diff options
Diffstat (limited to 'drivers/net/ethernet/micrel')
| -rw-r--r-- | drivers/net/ethernet/micrel/Kconfig | 66 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/Makefile | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8695net.c | 1631 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8695net.h | 107 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8842.c | 1272 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8851.c | 1623 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8851.h | 298 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8851_mll.c | 1713 | ||||
| -rw-r--r-- | drivers/net/ethernet/micrel/ksz884x.c | 7264 |
9 files changed, 13983 insertions, 0 deletions
diff --git a/drivers/net/ethernet/micrel/Kconfig b/drivers/net/ethernet/micrel/Kconfig new file mode 100644 index 00000000000..d16b11ed2e5 --- /dev/null +++ b/drivers/net/ethernet/micrel/Kconfig @@ -0,0 +1,66 @@ +# +# Micrel device configuration +# + +config NET_VENDOR_MICREL + bool "Micrel devices" + default y + depends on (HAS_IOMEM && DMA_ENGINE) || SPI || PCI || HAS_IOMEM || \ + (ARM && ARCH_KS8695) + ---help--- + If you have a network (Ethernet) card belonging to this class, say Y + and read the Ethernet-HOWTO, available from + <http://www.tldp.org/docs.html#howto>. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Micrel devices. If you say Y, you will be asked + for your specific card in the following questions. + +if NET_VENDOR_MICREL + +config ARM_KS8695_ETHER + tristate "KS8695 Ethernet support" + depends on ARM && ARCH_KS8695 + select MII + ---help--- + If you wish to compile a kernel for the KS8695 and want to + use the internal ethernet then you should answer Y to this. + +config KS8842 + tristate "Micrel KSZ8841/42 with generic bus interface" + depends on HAS_IOMEM && DMA_ENGINE + ---help--- + This platform driver is for KSZ8841(1-port) / KS8842(2-port) + ethernet switch chip (managed, VLAN, QoS) from Micrel or + Timberdale(FPGA). + +config KS8851 + tristate "Micrel KS8851 SPI" + depends on SPI + select MII + select CRC32 + select EEPROM_93CX6 + ---help--- + SPI driver for Micrel KS8851 SPI attached network chip. + +config KS8851_MLL + tristate "Micrel KS8851 MLL" + depends on HAS_IOMEM + select MII + ---help--- + This platform driver is for Micrel KS8851 Address/data bus + multiplexed network chip. + +config KSZ884X_PCI + tristate "Micrel KSZ8841/2 PCI" + depends on PCI + select MII + select CRC32 + ---help--- + This PCI driver is for Micrel KSZ8841/KSZ8842 PCI Ethernet chip. + + To compile this driver as a module, choose M here. The module + will be called ksz884x. + +endif # NET_VENDOR_MICREL diff --git a/drivers/net/ethernet/micrel/Makefile b/drivers/net/ethernet/micrel/Makefile new file mode 100644 index 00000000000..c83e4bc50c7 --- /dev/null +++ b/drivers/net/ethernet/micrel/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for the Micrel network device drivers. +# + +obj-$(CONFIG_ARM_KS8695_ETHER) += ks8695net.o +obj-$(CONFIG_KS8842) += ks8842.o +obj-$(CONFIG_KS8851) += ks8851.o +obj-$(CONFIG_KS8851_MLL) += ks8851_mll.o +obj-$(CONFIG_KSZ884X_PCI) += ksz884x.o diff --git a/drivers/net/ethernet/micrel/ks8695net.c b/drivers/net/ethernet/micrel/ks8695net.c new file mode 100644 index 00000000000..6c7c78baedc --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8695net.c @@ -0,0 +1,1631 @@ +/* + * Micrel KS8695 (Centaur) Ethernet. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * Copyright 2008 Simtec Electronics + * Daniel Silverstone <dsilvers@simtec.co.uk> + * Vincent Sanders <vince@simtec.co.uk> + */ + +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/interrupt.h> +#include <linux/skbuff.h> +#include <linux/spinlock.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <linux/slab.h> + +#include <asm/irq.h> + +#include <mach/regs-switch.h> +#include <mach/regs-misc.h> +#include <asm/mach/irq.h> +#include <mach/regs-irq.h> + +#include "ks8695net.h" + +#define MODULENAME "ks8695_ether" +#define MODULEVERSION "1.02" + +/* + * Transmit and device reset timeout, default 5 seconds. + */ +static int watchdog = 5000; + +/* Hardware structures */ + +/** + * struct rx_ring_desc - Receive descriptor ring element + * @status: The status of the descriptor element (E.g. who owns it) + * @length: The number of bytes in the block pointed to by data_ptr + * @data_ptr: The physical address of the data block to receive into + * @next_desc: The physical address of the next descriptor element. + */ +struct rx_ring_desc { + __le32 status; + __le32 length; + __le32 data_ptr; + __le32 next_desc; +}; + +/** + * struct tx_ring_desc - Transmit descriptor ring element + * @owner: Who owns the descriptor + * @status: The number of bytes in the block pointed to by data_ptr + * @data_ptr: The physical address of the data block to receive into + * @next_desc: The physical address of the next descriptor element. + */ +struct tx_ring_desc { + __le32 owner; + __le32 status; + __le32 data_ptr; + __le32 next_desc; +}; + +/** + * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings. + * @skb: The buffer in the ring + * @dma_ptr: The mapped DMA pointer of the buffer + * @length: The number of bytes mapped to dma_ptr + */ +struct ks8695_skbuff { + struct sk_buff *skb; + dma_addr_t dma_ptr; + u32 length; +}; + +/* Private device structure */ + +#define MAX_TX_DESC 8 +#define MAX_TX_DESC_MASK 0x7 +#define MAX_RX_DESC 16 +#define MAX_RX_DESC_MASK 0xf + +/*napi_weight have better more than rx DMA buffers*/ +#define NAPI_WEIGHT 64 + +#define MAX_RXBUF_SIZE 0x700 + +#define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC) +#define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC) +#define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE) + +/** + * enum ks8695_dtype - Device type + * @KS8695_DTYPE_WAN: This device is a WAN interface + * @KS8695_DTYPE_LAN: This device is a LAN interface + * @KS8695_DTYPE_HPNA: This device is an HPNA interface + */ +enum ks8695_dtype { + KS8695_DTYPE_WAN, + KS8695_DTYPE_LAN, + KS8695_DTYPE_HPNA, +}; + +/** + * struct ks8695_priv - Private data for the KS8695 Ethernet + * @in_suspend: Flag to indicate if we're suspending/resuming + * @ndev: The net_device for this interface + * @dev: The platform device object for this interface + * @dtype: The type of this device + * @io_regs: The ioremapped registers for this interface + * @napi : Add support NAPI for Rx + * @rx_irq_name: The textual name of the RX IRQ from the platform data + * @tx_irq_name: The textual name of the TX IRQ from the platform data + * @link_irq_name: The textual name of the link IRQ from the + * platform data if available + * @rx_irq: The IRQ number for the RX IRQ + * @tx_irq: The IRQ number for the TX IRQ + * @link_irq: The IRQ number for the link IRQ if available + * @regs_req: The resource request for the registers region + * @phyiface_req: The resource request for the phy/switch region + * if available + * @phyiface_regs: The ioremapped registers for the phy/switch if available + * @ring_base: The base pointer of the dma coherent memory for the rings + * @ring_base_dma: The DMA mapped equivalent of ring_base + * @tx_ring: The pointer in ring_base of the TX ring + * @tx_ring_used: The number of slots in the TX ring which are occupied + * @tx_ring_next_slot: The next slot to fill in the TX ring + * @tx_ring_dma: The DMA mapped equivalent of tx_ring + * @tx_buffers: The sk_buff mappings for the TX ring + * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables + * @rx_ring: The pointer in ring_base of the RX ring + * @rx_ring_dma: The DMA mapped equivalent of rx_ring + * @rx_buffers: The sk_buff mappings for the RX ring + * @next_rx_desc_read: The next RX descriptor to read from on IRQ + * @rx_lock: A lock to protect Rx irq function + * @msg_enable: The flags for which messages to emit + */ +struct ks8695_priv { + int in_suspend; + struct net_device *ndev; + struct device *dev; + enum ks8695_dtype dtype; + void __iomem *io_regs; + + struct napi_struct napi; + + const char *rx_irq_name, *tx_irq_name, *link_irq_name; + int rx_irq, tx_irq, link_irq; + + struct resource *regs_req, *phyiface_req; + void __iomem *phyiface_regs; + + void *ring_base; + dma_addr_t ring_base_dma; + + struct tx_ring_desc *tx_ring; + int tx_ring_used; + int tx_ring_next_slot; + dma_addr_t tx_ring_dma; + struct ks8695_skbuff tx_buffers[MAX_TX_DESC]; + spinlock_t txq_lock; + + struct rx_ring_desc *rx_ring; + dma_addr_t rx_ring_dma; + struct ks8695_skbuff rx_buffers[MAX_RX_DESC]; + int next_rx_desc_read; + spinlock_t rx_lock; + + int msg_enable; +}; + +/* Register access */ + +/** + * ks8695_readreg - Read from a KS8695 ethernet register + * @ksp: The device to read from + * @reg: The register to read + */ +static inline u32 +ks8695_readreg(struct ks8695_priv *ksp, int reg) +{ + return readl(ksp->io_regs + reg); +} + +/** + * ks8695_writereg - Write to a KS8695 ethernet register + * @ksp: The device to write to + * @reg: The register to write + * @value: The value to write to the register + */ +static inline void +ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value) +{ + writel(value, ksp->io_regs + reg); +} + +/* Utility functions */ + +/** + * ks8695_port_type - Retrieve port-type as user-friendly string + * @ksp: The device to return the type for + * + * Returns a string indicating which of the WAN, LAN or HPNA + * ports this device is likely to represent. + */ +static const char * +ks8695_port_type(struct ks8695_priv *ksp) +{ + switch (ksp->dtype) { + case KS8695_DTYPE_LAN: + return "LAN"; + case KS8695_DTYPE_WAN: + return "WAN"; + case KS8695_DTYPE_HPNA: + return "HPNA"; + } + + return "UNKNOWN"; +} + +/** + * ks8695_update_mac - Update the MAC registers in the device + * @ksp: The device to update + * + * Updates the MAC registers in the KS8695 device from the address in the + * net_device structure associated with this interface. + */ +static void +ks8695_update_mac(struct ks8695_priv *ksp) +{ + /* Update the HW with the MAC from the net_device */ + struct net_device *ndev = ksp->ndev; + u32 machigh, maclow; + + maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) | + (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0)); + machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0)); + + ks8695_writereg(ksp, KS8695_MAL, maclow); + ks8695_writereg(ksp, KS8695_MAH, machigh); + +} + +/** + * ks8695_refill_rxbuffers - Re-fill the RX buffer ring + * @ksp: The device to refill + * + * Iterates the RX ring of the device looking for empty slots. + * For each empty slot, we allocate and map a new SKB and give it + * to the hardware. + * This can be called from interrupt context safely. + */ +static void +ks8695_refill_rxbuffers(struct ks8695_priv *ksp) +{ + /* Run around the RX ring, filling in any missing sk_buff's */ + int buff_n; + + for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { + if (!ksp->rx_buffers[buff_n].skb) { + struct sk_buff *skb = + netdev_alloc_skb(ksp->ndev, MAX_RXBUF_SIZE); + dma_addr_t mapping; + + ksp->rx_buffers[buff_n].skb = skb; + if (skb == NULL) { + /* Failed to allocate one, perhaps + * we'll try again later. + */ + break; + } + + mapping = dma_map_single(ksp->dev, skb->data, + MAX_RXBUF_SIZE, + DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(ksp->dev, mapping))) { + /* Failed to DMA map this SKB, try later */ + dev_kfree_skb_irq(skb); + ksp->rx_buffers[buff_n].skb = NULL; + break; + } + ksp->rx_buffers[buff_n].dma_ptr = mapping; + ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE; + + /* Record this into the DMA ring */ + ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping); + ksp->rx_ring[buff_n].length = + cpu_to_le32(MAX_RXBUF_SIZE); + + wmb(); + + /* And give ownership over to the hardware */ + ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); + } + } +} + +/* Maximum number of multicast addresses which the KS8695 HW supports */ +#define KS8695_NR_ADDRESSES 16 + +/** + * ks8695_init_partial_multicast - Init the mcast addr registers + * @ksp: The device to initialise + * @addr: The multicast address list to use + * @nr_addr: The number of addresses in the list + * + * This routine is a helper for ks8695_set_multicast - it writes + * the additional-address registers in the KS8695 ethernet device + * and cleans up any others left behind. + */ +static void +ks8695_init_partial_multicast(struct ks8695_priv *ksp, + struct net_device *ndev) +{ + u32 low, high; + int i; + struct netdev_hw_addr *ha; + + i = 0; + netdev_for_each_mc_addr(ha, ndev) { + /* Ran out of space in chip? */ + BUG_ON(i == KS8695_NR_ADDRESSES); + + low = (ha->addr[2] << 24) | (ha->addr[3] << 16) | + (ha->addr[4] << 8) | (ha->addr[5]); + high = (ha->addr[0] << 8) | (ha->addr[1]); + + ks8695_writereg(ksp, KS8695_AAL_(i), low); + ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high); + i++; + } + + /* Clear the remaining Additional Station Addresses */ + for (; i < KS8695_NR_ADDRESSES; i++) { + ks8695_writereg(ksp, KS8695_AAL_(i), 0); + ks8695_writereg(ksp, KS8695_AAH_(i), 0); + } +} + +/* Interrupt handling */ + +/** + * ks8695_tx_irq - Transmit IRQ handler + * @irq: The IRQ which went off (ignored) + * @dev_id: The net_device for the interrupt + * + * Process the TX ring, clearing out any transmitted slots. + * Allows the net_device to pass us new packets once slots are + * freed. + */ +static irqreturn_t +ks8695_tx_irq(int irq, void *dev_id) +{ + struct net_device *ndev = (struct net_device *)dev_id; + struct ks8695_priv *ksp = netdev_priv(ndev); + int buff_n; + + for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { + if (ksp->tx_buffers[buff_n].skb && + !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) { + rmb(); + /* An SKB which is not owned by HW is present */ + /* Update the stats for the net_device */ + ndev->stats.tx_packets++; + ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length; + + /* Free the packet from the ring */ + ksp->tx_ring[buff_n].data_ptr = 0; + + /* Free the sk_buff */ + dma_unmap_single(ksp->dev, + ksp->tx_buffers[buff_n].dma_ptr, + ksp->tx_buffers[buff_n].length, + DMA_TO_DEVICE); + dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); + ksp->tx_buffers[buff_n].skb = NULL; + ksp->tx_ring_used--; + } + } + + netif_wake_queue(ndev); + + return IRQ_HANDLED; +} + +/** + * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit + * @ksp: Private data for the KS8695 Ethernet + * + * For KS8695 document: + * Interrupt Enable Register (offset 0xE204) + * Bit29 : WAN MAC Receive Interrupt Enable + * Bit16 : LAN MAC Receive Interrupt Enable + * Interrupt Status Register (Offset 0xF208) + * Bit29: WAN MAC Receive Status + * Bit16: LAN MAC Receive Status + * So, this Rx interrupt enable/status bit number is equal + * as Rx IRQ number. + */ +static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp) +{ + return ksp->rx_irq; +} + +/** + * ks8695_rx_irq - Receive IRQ handler + * @irq: The IRQ which went off (ignored) + * @dev_id: The net_device for the interrupt + * + * Inform NAPI that packet reception needs to be scheduled + */ + +static irqreturn_t +ks8695_rx_irq(int irq, void *dev_id) +{ + struct net_device *ndev = (struct net_device *)dev_id; + struct ks8695_priv *ksp = netdev_priv(ndev); + + spin_lock(&ksp->rx_lock); + + if (napi_schedule_prep(&ksp->napi)) { + unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); + unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); + /*disable rx interrupt*/ + status &= ~mask_bit; + writel(status , KS8695_IRQ_VA + KS8695_INTEN); + __napi_schedule(&ksp->napi); + } + + spin_unlock(&ksp->rx_lock); + return IRQ_HANDLED; +} + +/** + * ks8695_rx - Receive packets called by NAPI poll method + * @ksp: Private data for the KS8695 Ethernet + * @budget: Number of packets allowed to process + */ +static int ks8695_rx(struct ks8695_priv *ksp, int budget) +{ + struct net_device *ndev = ksp->ndev; + struct sk_buff *skb; + int buff_n; + u32 flags; + int pktlen; + int received = 0; + + buff_n = ksp->next_rx_desc_read; + while (received < budget + && ksp->rx_buffers[buff_n].skb + && (!(ksp->rx_ring[buff_n].status & + cpu_to_le32(RDES_OWN)))) { + rmb(); + flags = le32_to_cpu(ksp->rx_ring[buff_n].status); + + /* Found an SKB which we own, this means we + * received a packet + */ + if ((flags & (RDES_FS | RDES_LS)) != + (RDES_FS | RDES_LS)) { + /* This packet is not the first and + * the last segment. Therefore it is + * a "spanning" packet and we can't + * handle it + */ + goto rx_failure; + } + + if (flags & (RDES_ES | RDES_RE)) { + /* It's an error packet */ + ndev->stats.rx_errors++; + if (flags & RDES_TL) + ndev->stats.rx_length_errors++; + if (flags & RDES_RF) + ndev->stats.rx_length_errors++; + if (flags & RDES_CE) + ndev->stats.rx_crc_errors++; + if (flags & RDES_RE) + ndev->stats.rx_missed_errors++; + + goto rx_failure; + } + + pktlen = flags & RDES_FLEN; + pktlen -= 4; /* Drop the CRC */ + + /* Retrieve the sk_buff */ + skb = ksp->rx_buffers[buff_n].skb; + + /* Clear it from the ring */ + ksp->rx_buffers[buff_n].skb = NULL; + ksp->rx_ring[buff_n].data_ptr = 0; + + /* Unmap the SKB */ + dma_unmap_single(ksp->dev, + ksp->rx_buffers[buff_n].dma_ptr, + ksp->rx_buffers[buff_n].length, + DMA_FROM_DEVICE); + + /* Relinquish the SKB to the network layer */ + skb_put(skb, pktlen); + skb->protocol = eth_type_trans(skb, ndev); + netif_receive_skb(skb); + + /* Record stats */ + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += pktlen; + goto rx_finished; + +rx_failure: + /* This ring entry is an error, but we can + * re-use the skb + */ + /* Give the ring entry back to the hardware */ + ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN); +rx_finished: + received++; + buff_n = (buff_n + 1) & MAX_RX_DESC_MASK; + } + + /* And note which RX descriptor we last did */ + ksp->next_rx_desc_read = buff_n; + + /* And refill the buffers */ + ks8695_refill_rxbuffers(ksp); + + /* Kick the RX DMA engine, in case it became suspended */ + ks8695_writereg(ksp, KS8695_DRSC, 0); + + return received; +} + + +/** + * ks8695_poll - Receive packet by NAPI poll method + * @ksp: Private data for the KS8695 Ethernet + * @budget: The remaining number packets for network subsystem + * + * Invoked by the network core when it requests for new + * packets from the driver + */ +static int ks8695_poll(struct napi_struct *napi, int budget) +{ + struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi); + unsigned long work_done; + + unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN); + unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); + + work_done = ks8695_rx(ksp, budget); + + if (work_done < budget) { + unsigned long flags; + spin_lock_irqsave(&ksp->rx_lock, flags); + __napi_complete(napi); + /*enable rx interrupt*/ + writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN); + spin_unlock_irqrestore(&ksp->rx_lock, flags); + } + return work_done; +} + +/** + * ks8695_link_irq - Link change IRQ handler + * @irq: The IRQ which went off (ignored) + * @dev_id: The net_device for the interrupt + * + * The WAN interface can generate an IRQ when the link changes, + * report this to the net layer and the user. + */ +static irqreturn_t +ks8695_link_irq(int irq, void *dev_id) +{ + struct net_device *ndev = (struct net_device *)dev_id; + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + if (ctrl & WMC_WLS) { + netif_carrier_on(ndev); + if (netif_msg_link(ksp)) + dev_info(ksp->dev, + "%s: Link is now up (10%sMbps/%s-duplex)\n", + ndev->name, + (ctrl & WMC_WSS) ? "0" : "", + (ctrl & WMC_WDS) ? "Full" : "Half"); + } else { + netif_carrier_off(ndev); + if (netif_msg_link(ksp)) + dev_info(ksp->dev, "%s: Link is now down.\n", + ndev->name); + } + + return IRQ_HANDLED; +} + + +/* KS8695 Device functions */ + +/** + * ks8695_reset - Reset a KS8695 ethernet interface + * @ksp: The interface to reset + * + * Perform an engine reset of the interface and re-program it + * with sensible defaults. + */ +static void +ks8695_reset(struct ks8695_priv *ksp) +{ + int reset_timeout = watchdog; + /* Issue the reset via the TX DMA control register */ + ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST); + while (reset_timeout--) { + if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST)) + break; + msleep(1); + } + + if (reset_timeout < 0) { + dev_crit(ksp->dev, + "Timeout waiting for DMA engines to reset\n"); + /* And blithely carry on */ + } + + /* Definitely wait long enough before attempting to program + * the engines + */ + msleep(10); + + /* RX: unicast and broadcast */ + ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB); + /* TX: pad and add CRC */ + ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC); +} + +/** + * ks8695_shutdown - Shut down a KS8695 ethernet interface + * @ksp: The interface to shut down + * + * This disables packet RX/TX, cleans up IRQs, drains the rings, + * and basically places the interface into a clean shutdown + * state. + */ +static void +ks8695_shutdown(struct ks8695_priv *ksp) +{ + u32 ctrl; + int buff_n; + + /* Disable packet transmission */ + ctrl = ks8695_readreg(ksp, KS8695_DTXC); + ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE); + + /* Disable packet reception */ + ctrl = ks8695_readreg(ksp, KS8695_DRXC); + ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE); + + /* Release the IRQs */ + free_irq(ksp->rx_irq, ksp->ndev); + free_irq(ksp->tx_irq, ksp->ndev); + if (ksp->link_irq != -1) + free_irq(ksp->link_irq, ksp->ndev); + + /* Throw away any pending TX packets */ + for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { + if (ksp->tx_buffers[buff_n].skb) { + /* Remove this SKB from the TX ring */ + ksp->tx_ring[buff_n].owner = 0; + ksp->tx_ring[buff_n].status = 0; + ksp->tx_ring[buff_n].data_ptr = 0; + + /* Unmap and bin this SKB */ + dma_unmap_single(ksp->dev, + ksp->tx_buffers[buff_n].dma_ptr, + ksp->tx_buffers[buff_n].length, + DMA_TO_DEVICE); + dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb); + ksp->tx_buffers[buff_n].skb = NULL; + } + } + + /* Purge the RX buffers */ + for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { + if (ksp->rx_buffers[buff_n].skb) { + /* Remove the SKB from the RX ring */ + ksp->rx_ring[buff_n].status = 0; + ksp->rx_ring[buff_n].data_ptr = 0; + + /* Unmap and bin the SKB */ + dma_unmap_single(ksp->dev, + ksp->rx_buffers[buff_n].dma_ptr, + ksp->rx_buffers[buff_n].length, + DMA_FROM_DEVICE); + dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb); + ksp->rx_buffers[buff_n].skb = NULL; + } + } +} + + +/** + * ks8695_setup_irq - IRQ setup helper function + * @irq: The IRQ number to claim + * @irq_name: The name to give the IRQ claimant + * @handler: The function to call to handle the IRQ + * @ndev: The net_device to pass in as the dev_id argument to the handler + * + * Return 0 on success. + */ +static int +ks8695_setup_irq(int irq, const char *irq_name, + irq_handler_t handler, struct net_device *ndev) +{ + int ret; + + ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev); + + if (ret) { + dev_err(&ndev->dev, "failure to request IRQ %d\n", irq); + return ret; + } + + return 0; +} + +/** + * ks8695_init_net - Initialise a KS8695 ethernet interface + * @ksp: The interface to initialise + * + * This routine fills the RX ring, initialises the DMA engines, + * allocates the IRQs and then starts the packet TX and RX + * engines. + */ +static int +ks8695_init_net(struct ks8695_priv *ksp) +{ + int ret; + u32 ctrl; + + ks8695_refill_rxbuffers(ksp); + + /* Initialise the DMA engines */ + ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma); + ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma); + + /* Request the IRQs */ + ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name, + ks8695_rx_irq, ksp->ndev); + if (ret) + return ret; + ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name, + ks8695_tx_irq, ksp->ndev); + if (ret) + return ret; + if (ksp->link_irq != -1) { + ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name, + ks8695_link_irq, ksp->ndev); + if (ret) + return ret; + } + + /* Set up the ring indices */ + ksp->next_rx_desc_read = 0; + ksp->tx_ring_next_slot = 0; + ksp->tx_ring_used = 0; + + /* Bring up transmission */ + ctrl = ks8695_readreg(ksp, KS8695_DTXC); + /* Enable packet transmission */ + ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE); + + /* Bring up the reception */ + ctrl = ks8695_readreg(ksp, KS8695_DRXC); + /* Enable packet reception */ + ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE); + /* And start the DMA engine */ + ks8695_writereg(ksp, KS8695_DRSC, 0); + + /* All done */ + return 0; +} + +/** + * ks8695_release_device - HW resource release for KS8695 e-net + * @ksp: The device to be freed + * + * This unallocates io memory regions, dma-coherent regions etc + * which were allocated in ks8695_probe. + */ +static void +ks8695_release_device(struct ks8695_priv *ksp) +{ + /* Unmap the registers */ + iounmap(ksp->io_regs); + if (ksp->phyiface_regs) + iounmap(ksp->phyiface_regs); + + /* And release the request */ + release_resource(ksp->regs_req); + kfree(ksp->regs_req); + if (ksp->phyiface_req) { + release_resource(ksp->phyiface_req); + kfree(ksp->phyiface_req); + } + + /* Free the ring buffers */ + dma_free_coherent(ksp->dev, RING_DMA_SIZE, + ksp->ring_base, ksp->ring_base_dma); +} + +/* Ethtool support */ + +/** + * ks8695_get_msglevel - Get the messages enabled for emission + * @ndev: The network device to read from + */ +static u32 +ks8695_get_msglevel(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + + return ksp->msg_enable; +} + +/** + * ks8695_set_msglevel - Set the messages enabled for emission + * @ndev: The network device to configure + * @value: The messages to set for emission + */ +static void +ks8695_set_msglevel(struct net_device *ndev, u32 value) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + + ksp->msg_enable = value; +} + +/** + * ks8695_wan_get_settings - Get device-specific settings. + * @ndev: The network device to read settings from + * @cmd: The ethtool structure to read into + */ +static int +ks8695_wan_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + /* All ports on the KS8695 support these... */ + cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | + SUPPORTED_TP | SUPPORTED_MII); + cmd->transceiver = XCVR_INTERNAL; + + cmd->advertising = ADVERTISED_TP | ADVERTISED_MII; + cmd->port = PORT_MII; + cmd->supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause); + cmd->phy_address = 0; + + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + if ((ctrl & WMC_WAND) == 0) { + /* auto-negotiation is enabled */ + cmd->advertising |= ADVERTISED_Autoneg; + if (ctrl & WMC_WANA100F) + cmd->advertising |= ADVERTISED_100baseT_Full; + if (ctrl & WMC_WANA100H) + cmd->advertising |= ADVERTISED_100baseT_Half; + if (ctrl & WMC_WANA10F) + cmd->advertising |= ADVERTISED_10baseT_Full; + if (ctrl & WMC_WANA10H) + cmd->advertising |= ADVERTISED_10baseT_Half; + if (ctrl & WMC_WANAP) + cmd->advertising |= ADVERTISED_Pause; + cmd->autoneg = AUTONEG_ENABLE; + + ethtool_cmd_speed_set(cmd, + (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10); + cmd->duplex = (ctrl & WMC_WDS) ? + DUPLEX_FULL : DUPLEX_HALF; + } else { + /* auto-negotiation is disabled */ + cmd->autoneg = AUTONEG_DISABLE; + + ethtool_cmd_speed_set(cmd, ((ctrl & WMC_WANF100) ? + SPEED_100 : SPEED_10)); + cmd->duplex = (ctrl & WMC_WANFF) ? + DUPLEX_FULL : DUPLEX_HALF; + } + + return 0; +} + +/** + * ks8695_wan_set_settings - Set device-specific settings. + * @ndev: The network device to configure + * @cmd: The settings to configure + */ +static int +ks8695_wan_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + if ((cmd->speed != SPEED_10) && (cmd->speed != SPEED_100)) + return -EINVAL; + if ((cmd->duplex != DUPLEX_HALF) && (cmd->duplex != DUPLEX_FULL)) + return -EINVAL; + if (cmd->port != PORT_MII) + return -EINVAL; + if (cmd->transceiver != XCVR_INTERNAL) + return -EINVAL; + if ((cmd->autoneg != AUTONEG_DISABLE) && + (cmd->autoneg != AUTONEG_ENABLE)) + return -EINVAL; + + if (cmd->autoneg == AUTONEG_ENABLE) { + if ((cmd->advertising & (ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_100baseT_Full)) == 0) + return -EINVAL; + + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + + ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H | + WMC_WANA10F | WMC_WANA10H); + if (cmd->advertising & ADVERTISED_100baseT_Full) + ctrl |= WMC_WANA100F; + if (cmd->advertising & ADVERTISED_100baseT_Half) + ctrl |= WMC_WANA100H; + if (cmd->advertising & ADVERTISED_10baseT_Full) + ctrl |= WMC_WANA10F; + if (cmd->advertising & ADVERTISED_10baseT_Half) + ctrl |= WMC_WANA10H; + + /* force a re-negotiation */ + ctrl |= WMC_WANR; + writel(ctrl, ksp->phyiface_regs + KS8695_WMC); + } else { + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + + /* disable auto-negotiation */ + ctrl |= WMC_WAND; + ctrl &= ~(WMC_WANF100 | WMC_WANFF); + + if (cmd->speed == SPEED_100) + ctrl |= WMC_WANF100; + if (cmd->duplex == DUPLEX_FULL) + ctrl |= WMC_WANFF; + + writel(ctrl, ksp->phyiface_regs + KS8695_WMC); + } + + return 0; +} + +/** + * ks8695_wan_nwayreset - Restart the autonegotiation on the port. + * @ndev: The network device to restart autoneotiation on + */ +static int +ks8695_wan_nwayreset(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + + if ((ctrl & WMC_WAND) == 0) + writel(ctrl | WMC_WANR, + ksp->phyiface_regs + KS8695_WMC); + else + /* auto-negotiation not enabled */ + return -EINVAL; + + return 0; +} + +/** + * ks8695_wan_get_pause - Retrieve network pause/flow-control advertising + * @ndev: The device to retrieve settings from + * @param: The structure to fill out with the information + */ +static void +ks8695_wan_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + ctrl = readl(ksp->phyiface_regs + KS8695_WMC); + + /* advertise Pause */ + param->autoneg = (ctrl & WMC_WANAP); + + /* current Rx Flow-control */ + ctrl = ks8695_readreg(ksp, KS8695_DRXC); + param->rx_pause = (ctrl & DRXC_RFCE); + + /* current Tx Flow-control */ + ctrl = ks8695_readreg(ksp, KS8695_DTXC); + param->tx_pause = (ctrl & DTXC_TFCE); +} + +/** + * ks8695_get_drvinfo - Retrieve driver information + * @ndev: The network device to retrieve info about + * @info: The info structure to fill out. + */ +static void +ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) +{ + strlcpy(info->driver, MODULENAME, sizeof(info->driver)); + strlcpy(info->version, MODULEVERSION, sizeof(info->version)); + strlcpy(info->bus_info, dev_name(ndev->dev.parent), + sizeof(info->bus_info)); +} + +static const struct ethtool_ops ks8695_ethtool_ops = { + .get_msglevel = ks8695_get_msglevel, + .set_msglevel = ks8695_set_msglevel, + .get_drvinfo = ks8695_get_drvinfo, +}; + +static const struct ethtool_ops ks8695_wan_ethtool_ops = { + .get_msglevel = ks8695_get_msglevel, + .set_msglevel = ks8695_set_msglevel, + .get_settings = ks8695_wan_get_settings, + .set_settings = ks8695_wan_set_settings, + .nway_reset = ks8695_wan_nwayreset, + .get_link = ethtool_op_get_link, + .get_pauseparam = ks8695_wan_get_pause, + .get_drvinfo = ks8695_get_drvinfo, +}; + +/* Network device interface functions */ + +/** + * ks8695_set_mac - Update MAC in net dev and HW + * @ndev: The network device to update + * @addr: The new MAC address to set + */ +static int +ks8695_set_mac(struct net_device *ndev, void *addr) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + struct sockaddr *address = addr; + + if (!is_valid_ether_addr(address->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len); + + ks8695_update_mac(ksp); + + dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n", + ndev->name, ndev->dev_addr); + + return 0; +} + +/** + * ks8695_set_multicast - Set up the multicast behaviour of the interface + * @ndev: The net_device to configure + * + * This routine, called by the net layer, configures promiscuity + * and multicast reception behaviour for the interface. + */ +static void +ks8695_set_multicast(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + u32 ctrl; + + ctrl = ks8695_readreg(ksp, KS8695_DRXC); + + if (ndev->flags & IFF_PROMISC) { + /* enable promiscuous mode */ + ctrl |= DRXC_RA; + } else if (ndev->flags & ~IFF_PROMISC) { + /* disable promiscuous mode */ + ctrl &= ~DRXC_RA; + } + + if (ndev->flags & IFF_ALLMULTI) { + /* enable all multicast mode */ + ctrl |= DRXC_RM; + } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) { + /* more specific multicast addresses than can be + * handled in hardware + */ + ctrl |= DRXC_RM; + } else { + /* enable specific multicasts */ + ctrl &= ~DRXC_RM; + ks8695_init_partial_multicast(ksp, ndev); + } + + ks8695_writereg(ksp, KS8695_DRXC, ctrl); +} + +/** + * ks8695_timeout - Handle a network tx/rx timeout. + * @ndev: The net_device which timed out. + * + * A network transaction timed out, reset the device. + */ +static void +ks8695_timeout(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + + netif_stop_queue(ndev); + ks8695_shutdown(ksp); + + ks8695_reset(ksp); + + ks8695_update_mac(ksp); + + /* We ignore the return from this since it managed to init + * before it probably will be okay to init again. + */ + ks8695_init_net(ksp); + + /* Reconfigure promiscuity etc */ + ks8695_set_multicast(ndev); + + /* And start the TX queue once more */ + netif_start_queue(ndev); +} + +/** + * ks8695_start_xmit - Start a packet transmission + * @skb: The packet to transmit + * @ndev: The network device to send the packet on + * + * This routine, called by the net layer, takes ownership of the + * sk_buff and adds it to the TX ring. It then kicks the TX DMA + * engine to ensure transmission begins. + */ +static int +ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + int buff_n; + dma_addr_t dmap; + + spin_lock_irq(&ksp->txq_lock); + + if (ksp->tx_ring_used == MAX_TX_DESC) { + /* Somehow we got entered when we have no room */ + spin_unlock_irq(&ksp->txq_lock); + return NETDEV_TX_BUSY; + } + + buff_n = ksp->tx_ring_next_slot; + + BUG_ON(ksp->tx_buffers[buff_n].skb); + + dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(ksp->dev, dmap))) { + /* Failed to DMA map this SKB, give it back for now */ + spin_unlock_irq(&ksp->txq_lock); + dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\ + "transmission, trying later\n", ndev->name); + return NETDEV_TX_BUSY; + } + + ksp->tx_buffers[buff_n].dma_ptr = dmap; + /* Mapped okay, store the buffer pointer and length for later */ + ksp->tx_buffers[buff_n].skb = skb; + ksp->tx_buffers[buff_n].length = skb->len; + + /* Fill out the TX descriptor */ + ksp->tx_ring[buff_n].data_ptr = + cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr); + ksp->tx_ring[buff_n].status = + cpu_to_le32(TDES_IC | TDES_FS | TDES_LS | + (skb->len & TDES_TBS)); + + wmb(); + + /* Hand it over to the hardware */ + ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN); + + if (++ksp->tx_ring_used == MAX_TX_DESC) + netif_stop_queue(ndev); + + /* Kick the TX DMA in case it decided to go IDLE */ + ks8695_writereg(ksp, KS8695_DTSC, 0); + + /* And update the next ring slot */ + ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK; + + spin_unlock_irq(&ksp->txq_lock); + return NETDEV_TX_OK; +} + +/** + * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface + * @ndev: The net_device to stop + * + * This disables the TX queue and cleans up a KS8695 ethernet + * device. + */ +static int +ks8695_stop(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + + netif_stop_queue(ndev); + napi_disable(&ksp->napi); + + ks8695_shutdown(ksp); + + return 0; +} + +/** + * ks8695_open - Open (bring up) a KS8695 ethernet interface + * @ndev: The net_device to open + * + * This resets, configures the MAC, initialises the RX ring and + * DMA engines and starts the TX queue for a KS8695 ethernet + * device. + */ +static int +ks8695_open(struct net_device *ndev) +{ + struct ks8695_priv *ksp = netdev_priv(ndev); + int ret; + + ks8695_reset(ksp); + + ks8695_update_mac(ksp); + + ret = ks8695_init_net(ksp); + if (ret) { + ks8695_shutdown(ksp); + return ret; + } + + napi_enable(&ksp->napi); + netif_start_queue(ndev); + + return 0; +} + +/* Platform device driver */ + +/** + * ks8695_init_switch - Init LAN switch to known good defaults. + * @ksp: The device to initialise + * + * This initialises the LAN switch in the KS8695 to a known-good + * set of defaults. + */ +static void +ks8695_init_switch(struct ks8695_priv *ksp) +{ + u32 ctrl; + + /* Default value for SEC0 according to datasheet */ + ctrl = 0x40819e00; + + /* LED0 = Speed LED1 = Link/Activity */ + ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S); + ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY); + + /* Enable Switch */ + ctrl |= SEC0_ENABLE; + + writel(ctrl, ksp->phyiface_regs + KS8695_SEC0); + + /* Defaults for SEC1 */ + writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1); +} + +/** + * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults + * @ksp: The device to initialise + * + * This initialises a KS8695's WAN phy to sensible values for + * autonegotiation etc. + */ +static void +ks8695_init_wan_phy(struct ks8695_priv *ksp) +{ + u32 ctrl; + + /* Support auto-negotiation */ + ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H | + WMC_WANA10F | WMC_WANA10H); + + /* LED0 = Activity , LED1 = Link */ + ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK); + + /* Restart Auto-negotiation */ + ctrl |= WMC_WANR; + + writel(ctrl, ksp->phyiface_regs + KS8695_WMC); + + writel(0, ksp->phyiface_regs + KS8695_WPPM); + writel(0, ksp->phyiface_regs + KS8695_PPS); +} + +static const struct net_device_ops ks8695_netdev_ops = { + .ndo_open = ks8695_open, + .ndo_stop = ks8695_stop, + .ndo_start_xmit = ks8695_start_xmit, + .ndo_tx_timeout = ks8695_timeout, + .ndo_set_mac_address = ks8695_set_mac, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_rx_mode = ks8695_set_multicast, +}; + +/** + * ks8695_probe - Probe and initialise a KS8695 ethernet interface + * @pdev: The platform device to probe + * + * Initialise a KS8695 ethernet device from platform data. + * + * This driver requires at least one IORESOURCE_MEM for the + * registers and two IORESOURCE_IRQ for the RX and TX IRQs + * respectively. It can optionally take an additional + * IORESOURCE_MEM for the switch or phy in the case of the lan or + * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan + * port. + */ +static int +ks8695_probe(struct platform_device *pdev) +{ + struct ks8695_priv *ksp; + struct net_device *ndev; + struct resource *regs_res, *phyiface_res; + struct resource *rxirq_res, *txirq_res, *linkirq_res; + int ret = 0; + int buff_n; + u32 machigh, maclow; + + /* Initialise a net_device */ + ndev = alloc_etherdev(sizeof(struct ks8695_priv)); + if (!ndev) + return -ENOMEM; + + SET_NETDEV_DEV(ndev, &pdev->dev); + + dev_dbg(&pdev->dev, "ks8695_probe() called\n"); + + /* Configure our private structure a little */ + ksp = netdev_priv(ndev); + + ksp->dev = &pdev->dev; + ksp->ndev = ndev; + ksp->msg_enable = NETIF_MSG_LINK; + + /* Retrieve resources */ + regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + + rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2); + + if (!(regs_res && rxirq_res && txirq_res)) { + dev_err(ksp->dev, "insufficient resources\n"); + ret = -ENOENT; + goto failure; + } + + ksp->regs_req = request_mem_region(regs_res->start, + resource_size(regs_res), + pdev->name); + + if (!ksp->regs_req) { + dev_err(ksp->dev, "cannot claim register space\n"); + ret = -EIO; + goto failure; + } + + ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res)); + + if (!ksp->io_regs) { + dev_err(ksp->dev, "failed to ioremap registers\n"); + ret = -EINVAL; + goto failure; + } + + if (phyiface_res) { + ksp->phyiface_req = + request_mem_region(phyiface_res->start, + resource_size(phyiface_res), + phyiface_res->name); + + if (!ksp->phyiface_req) { + dev_err(ksp->dev, + "cannot claim switch register space\n"); + ret = -EIO; + goto failure; + } + + ksp->phyiface_regs = ioremap(phyiface_res->start, + resource_size(phyiface_res)); + + if (!ksp->phyiface_regs) { + dev_err(ksp->dev, + "failed to ioremap switch registers\n"); + ret = -EINVAL; + goto failure; + } + } + + ksp->rx_irq = rxirq_res->start; + ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX"; + ksp->tx_irq = txirq_res->start; + ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX"; + ksp->link_irq = (linkirq_res ? linkirq_res->start : -1); + ksp->link_irq_name = (linkirq_res && linkirq_res->name) ? + linkirq_res->name : "Ethernet Link"; + + /* driver system setup */ + ndev->netdev_ops = &ks8695_netdev_ops; + ndev->watchdog_timeo = msecs_to_jiffies(watchdog); + + netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT); + + /* Retrieve the default MAC addr from the chip. */ + /* The bootloader should have left it in there for us. */ + + machigh = ks8695_readreg(ksp, KS8695_MAH); + maclow = ks8695_readreg(ksp, KS8695_MAL); + + ndev->dev_addr[0] = (machigh >> 8) & 0xFF; + ndev->dev_addr[1] = machigh & 0xFF; + ndev->dev_addr[2] = (maclow >> 24) & 0xFF; + ndev->dev_addr[3] = (maclow >> 16) & 0xFF; + ndev->dev_addr[4] = (maclow >> 8) & 0xFF; + ndev->dev_addr[5] = maclow & 0xFF; + + if (!is_valid_ether_addr(ndev->dev_addr)) + dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please " + "set using ifconfig\n", ndev->name); + + /* In order to be efficient memory-wise, we allocate both + * rings in one go. + */ + ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE, + &ksp->ring_base_dma, GFP_KERNEL); + if (!ksp->ring_base) { + ret = -ENOMEM; + goto failure; + } + + /* Specify the TX DMA ring buffer */ + ksp->tx_ring = ksp->ring_base; + ksp->tx_ring_dma = ksp->ring_base_dma; + + /* And initialise the queue's lock */ + spin_lock_init(&ksp->txq_lock); + spin_lock_init(&ksp->rx_lock); + + /* Specify the RX DMA ring buffer */ + ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE; + ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE; + + /* Zero the descriptor rings */ + memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE); + memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE); + + /* Build the rings */ + for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) { + ksp->tx_ring[buff_n].next_desc = + cpu_to_le32(ksp->tx_ring_dma + + (sizeof(struct tx_ring_desc) * + ((buff_n + 1) & MAX_TX_DESC_MASK))); + } + + for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) { + ksp->rx_ring[buff_n].next_desc = + cpu_to_le32(ksp->rx_ring_dma + + (sizeof(struct rx_ring_desc) * + ((buff_n + 1) & MAX_RX_DESC_MASK))); + } + + /* Initialise the port (physically) */ + if (ksp->phyiface_regs && ksp->link_irq == -1) { + ks8695_init_switch(ksp); + ksp->dtype = KS8695_DTYPE_LAN; + ndev->ethtool_ops = &ks8695_ethtool_ops; + } else if (ksp->phyiface_regs && ksp->link_irq != -1) { + ks8695_init_wan_phy(ksp); + ksp->dtype = KS8695_DTYPE_WAN; + ndev->ethtool_ops = &ks8695_wan_ethtool_ops; + } else { + /* No initialisation since HPNA does not have a PHY */ + ksp->dtype = KS8695_DTYPE_HPNA; + ndev->ethtool_ops = &ks8695_ethtool_ops; + } + + /* And bring up the net_device with the net core */ + platform_set_drvdata(pdev, ndev); + ret = register_netdev(ndev); + + if (ret == 0) { + dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n", + ks8695_port_type(ksp), ndev->dev_addr); + } else { + /* Report the failure to register the net_device */ + dev_err(ksp->dev, "ks8695net: failed to register netdev.\n"); + goto failure; + } + + /* All is well */ + return 0; + + /* Error exit path */ +failure: + ks8695_release_device(ksp); + free_netdev(ndev); + + return ret; +} + +/** + * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device. + * @pdev: The device to suspend + * @state: The suspend state + * + * This routine detaches and shuts down a KS8695 ethernet device. + */ +static int +ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ks8695_priv *ksp = netdev_priv(ndev); + + ksp->in_suspend = 1; + + if (netif_running(ndev)) { + netif_device_detach(ndev); + ks8695_shutdown(ksp); + } + + return 0; +} + +/** + * ks8695_drv_resume - Resume a KS8695 ethernet platform device. + * @pdev: The device to resume + * + * This routine re-initialises and re-attaches a KS8695 ethernet + * device. + */ +static int +ks8695_drv_resume(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ks8695_priv *ksp = netdev_priv(ndev); + + if (netif_running(ndev)) { + ks8695_reset(ksp); + ks8695_init_net(ksp); + ks8695_set_multicast(ndev); + netif_device_attach(ndev); + } + + ksp->in_suspend = 0; + + return 0; +} + +/** + * ks8695_drv_remove - Remove a KS8695 net device on driver unload. + * @pdev: The platform device to remove + * + * This unregisters and releases a KS8695 ethernet device. + */ +static int +ks8695_drv_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ks8695_priv *ksp = netdev_priv(ndev); + + netif_napi_del(&ksp->napi); + + unregister_netdev(ndev); + ks8695_release_device(ksp); + free_netdev(ndev); + + dev_dbg(&pdev->dev, "released and freed device\n"); + return 0; +} + +static struct platform_driver ks8695_driver = { + .driver = { + .name = MODULENAME, + .owner = THIS_MODULE, + }, + .probe = ks8695_probe, + .remove = ks8695_drv_remove, + .suspend = ks8695_drv_suspend, + .resume = ks8695_drv_resume, +}; + +module_platform_driver(ks8695_driver); + +MODULE_AUTHOR("Simtec Electronics"); +MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" MODULENAME); + +module_param(watchdog, int, 0400); +MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); diff --git a/drivers/net/ethernet/micrel/ks8695net.h b/drivers/net/ethernet/micrel/ks8695net.h new file mode 100644 index 00000000000..80eff6ea516 --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8695net.h @@ -0,0 +1,107 @@ +/* + * Micrel KS8695 (Centaur) Ethernet. + * + * Copyright 2008 Simtec Electronics + * Daniel Silverstone <dsilvers@simtec.co.uk> + * Vincent Sanders <vince@simtec.co.uk> + */ + +#ifndef KS8695NET_H +#define KS8695NET_H + +/* Receive descriptor flags */ +#define RDES_OWN (1 << 31) /* Ownership */ +#define RDES_FS (1 << 30) /* First Descriptor */ +#define RDES_LS (1 << 29) /* Last Descriptor */ +#define RDES_IPE (1 << 28) /* IP Checksum error */ +#define RDES_TCPE (1 << 27) /* TCP Checksum error */ +#define RDES_UDPE (1 << 26) /* UDP Checksum error */ +#define RDES_ES (1 << 25) /* Error summary */ +#define RDES_MF (1 << 24) /* Multicast Frame */ +#define RDES_RE (1 << 19) /* MII Error reported */ +#define RDES_TL (1 << 18) /* Frame too Long */ +#define RDES_RF (1 << 17) /* Runt Frame */ +#define RDES_CE (1 << 16) /* CRC error */ +#define RDES_FT (1 << 15) /* Frame Type */ +#define RDES_FLEN (0x7ff) /* Frame Length */ + +#define RDES_RER (1 << 25) /* Receive End of Ring */ +#define RDES_RBS (0x7ff) /* Receive Buffer Size */ + +/* Transmit descriptor flags */ + +#define TDES_OWN (1 << 31) /* Ownership */ + +#define TDES_IC (1 << 31) /* Interrupt on Completion */ +#define TDES_FS (1 << 30) /* First Segment */ +#define TDES_LS (1 << 29) /* Last Segment */ +#define TDES_IPCKG (1 << 28) /* IP Checksum generate */ +#define TDES_TCPCKG (1 << 27) /* TCP Checksum generate */ +#define TDES_UDPCKG (1 << 26) /* UDP Checksum generate */ +#define TDES_TER (1 << 25) /* Transmit End of Ring */ +#define TDES_TBS (0x7ff) /* Transmit Buffer Size */ + +/* + * Network controller register offsets + */ +#define KS8695_DTXC (0x00) /* DMA Transmit Control */ +#define KS8695_DRXC (0x04) /* DMA Receive Control */ +#define KS8695_DTSC (0x08) /* DMA Transmit Start Command */ +#define KS8695_DRSC (0x0c) /* DMA Receive Start Command */ +#define KS8695_TDLB (0x10) /* Transmit Descriptor List + * Base Address + */ +#define KS8695_RDLB (0x14) /* Receive Descriptor List + * Base Address + */ +#define KS8695_MAL (0x18) /* MAC Station Address Low */ +#define KS8695_MAH (0x1c) /* MAC Station Address High */ +#define KS8695_AAL_(n) (0x80 + ((n)*8)) /* MAC Additional + * Station Address + * (0..15) Low + */ +#define KS8695_AAH_(n) (0x84 + ((n)*8)) /* MAC Additional + * Station Address + * (0..15) High + */ + + +/* DMA Transmit Control Register */ +#define DTXC_TRST (1 << 31) /* Soft Reset */ +#define DTXC_TBS (0x3f << 24) /* Transmit Burst Size */ +#define DTXC_TUCG (1 << 18) /* Transmit UDP + * Checksum Generate + */ +#define DTXC_TTCG (1 << 17) /* Transmit TCP + * Checksum Generate + */ +#define DTXC_TICG (1 << 16) /* Transmit IP + * Checksum Generate + */ +#define DTXC_TFCE (1 << 9) /* Transmit Flow + * Control Enable + */ +#define DTXC_TLB (1 << 8) /* Loopback mode */ +#define DTXC_TEP (1 << 2) /* Transmit Enable Padding */ +#define DTXC_TAC (1 << 1) /* Transmit Add CRC */ +#define DTXC_TE (1 << 0) /* TX Enable */ + +/* DMA Receive Control Register */ +#define DRXC_RBS (0x3f << 24) /* Receive Burst Size */ +#define DRXC_RUCC (1 << 18) /* Receive UDP Checksum check */ +#define DRXC_RTCG (1 << 17) /* Receive TCP Checksum check */ +#define DRXC_RICG (1 << 16) /* Receive IP Checksum check */ +#define DRXC_RFCE (1 << 9) /* Receive Flow Control + * Enable + */ +#define DRXC_RB (1 << 6) /* Receive Broadcast */ +#define DRXC_RM (1 << 5) /* Receive Multicast */ +#define DRXC_RU (1 << 4) /* Receive Unicast */ +#define DRXC_RERR (1 << 3) /* Receive Error Frame */ +#define DRXC_RA (1 << 2) /* Receive All */ +#define DRXC_RE (1 << 0) /* RX Enable */ + +/* Additional Station Address High */ +#define AAH_E (1 << 31) /* Address Enabled */ + +#endif /* KS8695NET_H */ diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c new file mode 100644 index 00000000000..822616e3c37 --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -0,0 +1,1272 @@ +/* + * ks8842.c timberdale KS8842 ethernet driver + * Copyright (c) 2009 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* Supports: + * The Micrel KS8842 behind the timberdale FPGA + * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/ks8842.h> +#include <linux/dmaengine.h> +#include <linux/dma-mapping.h> +#include <linux/scatterlist.h> + +#define DRV_NAME "ks8842" + +/* Timberdale specific Registers */ +#define REG_TIMB_RST 0x1c +#define REG_TIMB_FIFO 0x20 +#define REG_TIMB_ISR 0x24 +#define REG_TIMB_IER 0x28 +#define REG_TIMB_IAR 0x2C +#define REQ_TIMB_DMA_RESUME 0x30 + +/* KS8842 registers */ + +#define REG_SELECT_BANK 0x0e + +/* bank 0 registers */ +#define REG_QRFCR 0x04 + +/* bank 2 registers */ +#define REG_MARL 0x00 +#define REG_MARM 0x02 +#define REG_MARH 0x04 + +/* bank 3 registers */ +#define REG_GRR 0x06 + +/* bank 16 registers */ +#define REG_TXCR 0x00 +#define REG_TXSR 0x02 +#define REG_RXCR 0x04 +#define REG_TXMIR 0x08 +#define REG_RXMIR 0x0A + +/* bank 17 registers */ +#define REG_TXQCR 0x00 +#define REG_RXQCR 0x02 +#define REG_TXFDPR 0x04 +#define REG_RXFDPR 0x06 +#define REG_QMU_DATA_LO 0x08 +#define REG_QMU_DATA_HI 0x0A + +/* bank 18 registers */ +#define REG_IER 0x00 +#define IRQ_LINK_CHANGE 0x8000 +#define IRQ_TX 0x4000 +#define IRQ_RX 0x2000 +#define IRQ_RX_OVERRUN 0x0800 +#define IRQ_TX_STOPPED 0x0200 +#define IRQ_RX_STOPPED 0x0100 +#define IRQ_RX_ERROR 0x0080 +#define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \ + IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) +/* When running via timberdale in DMA mode, the RX interrupt should be + enabled in the KS8842, but not in the FPGA IP, since the IP handles + RX DMA internally. + TX interrupts are not needed it is handled by the FPGA the driver is + notified via DMA callbacks. +*/ +#define ENABLED_IRQS_DMA_IP (IRQ_LINK_CHANGE | IRQ_RX_STOPPED | \ + IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) +#define ENABLED_IRQS_DMA (ENABLED_IRQS_DMA_IP | IRQ_RX) +#define REG_ISR 0x02 +#define REG_RXSR 0x04 +#define RXSR_VALID 0x8000 +#define RXSR_BROADCAST 0x80 +#define RXSR_MULTICAST 0x40 +#define RXSR_UNICAST 0x20 +#define RXSR_FRAMETYPE 0x08 +#define RXSR_TOO_LONG 0x04 +#define RXSR_RUNT 0x02 +#define RXSR_CRC_ERROR 0x01 +#define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR) + +/* bank 32 registers */ +#define REG_SW_ID_AND_ENABLE 0x00 +#define REG_SGCR1 0x02 +#define REG_SGCR2 0x04 +#define REG_SGCR3 0x06 + +/* bank 39 registers */ +#define REG_MACAR1 0x00 +#define REG_MACAR2 0x02 +#define REG_MACAR3 0x04 + +/* bank 45 registers */ +#define REG_P1MBCR 0x00 +#define REG_P1MBSR 0x02 + +/* bank 46 registers */ +#define REG_P2MBCR 0x00 +#define REG_P2MBSR 0x02 + +/* bank 48 registers */ +#define REG_P1CR2 0x02 + +/* bank 49 registers */ +#define REG_P1CR4 0x02 +#define REG_P1SR 0x04 + +/* flags passed by platform_device for configuration */ +#define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */ +#define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */ + +#define DMA_BUFFER_SIZE 2048 + +struct ks8842_tx_dma_ctl { + struct dma_chan *chan; + struct dma_async_tx_descriptor *adesc; + void *buf; + struct scatterlist sg; + int channel; +}; + +struct ks8842_rx_dma_ctl { + struct dma_chan *chan; + struct dma_async_tx_descriptor *adesc; + struct sk_buff *skb; + struct scatterlist sg; + struct tasklet_struct tasklet; + int channel; +}; + +#define KS8842_USE_DMA(adapter) (((adapter)->dma_tx.channel != -1) && \ + ((adapter)->dma_rx.channel != -1)) + +struct ks8842_adapter { + void __iomem *hw_addr; + int irq; + unsigned long conf_flags; /* copy of platform_device config */ + struct tasklet_struct tasklet; + spinlock_t lock; /* spinlock to be interrupt safe */ + struct work_struct timeout_work; + struct net_device *netdev; + struct device *dev; + struct ks8842_tx_dma_ctl dma_tx; + struct ks8842_rx_dma_ctl dma_rx; +}; + +static void ks8842_dma_rx_cb(void *data); +static void ks8842_dma_tx_cb(void *data); + +static inline void ks8842_resume_dma(struct ks8842_adapter *adapter) +{ + iowrite32(1, adapter->hw_addr + REQ_TIMB_DMA_RESUME); +} + +static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank) +{ + iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK); +} + +static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank, + u8 value, int offset) +{ + ks8842_select_bank(adapter, bank); + iowrite8(value, adapter->hw_addr + offset); +} + +static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank, + u16 value, int offset) +{ + ks8842_select_bank(adapter, bank); + iowrite16(value, adapter->hw_addr + offset); +} + +static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank, + u16 bits, int offset) +{ + u16 reg; + ks8842_select_bank(adapter, bank); + reg = ioread16(adapter->hw_addr + offset); + reg |= bits; + iowrite16(reg, adapter->hw_addr + offset); +} + +static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank, + u16 bits, int offset) +{ + u16 reg; + ks8842_select_bank(adapter, bank); + reg = ioread16(adapter->hw_addr + offset); + reg &= ~bits; + iowrite16(reg, adapter->hw_addr + offset); +} + +static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank, + u32 value, int offset) +{ + ks8842_select_bank(adapter, bank); + iowrite32(value, adapter->hw_addr + offset); +} + +static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank, + int offset) +{ + ks8842_select_bank(adapter, bank); + return ioread8(adapter->hw_addr + offset); +} + +static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank, + int offset) +{ + ks8842_select_bank(adapter, bank); + return ioread16(adapter->hw_addr + offset); +} + +static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, + int offset) +{ + ks8842_select_bank(adapter, bank); + return ioread32(adapter->hw_addr + offset); +} + +static void ks8842_reset(struct ks8842_adapter *adapter) +{ + if (adapter->conf_flags & MICREL_KS884X) { + ks8842_write16(adapter, 3, 1, REG_GRR); + msleep(10); + iowrite16(0, adapter->hw_addr + REG_GRR); + } else { + /* The KS8842 goes haywire when doing softare reset + * a work around in the timberdale IP is implemented to + * do a hardware reset instead + ks8842_write16(adapter, 3, 1, REG_GRR); + msleep(10); + iowrite16(0, adapter->hw_addr + REG_GRR); + */ + iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); + msleep(20); + } +} + +static void ks8842_update_link_status(struct net_device *netdev, + struct ks8842_adapter *adapter) +{ + /* check the status of the link */ + if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) { + netif_carrier_on(netdev); + netif_wake_queue(netdev); + } else { + netif_stop_queue(netdev); + netif_carrier_off(netdev); + } +} + +static void ks8842_enable_tx(struct ks8842_adapter *adapter) +{ + ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR); +} + +static void ks8842_disable_tx(struct ks8842_adapter *adapter) +{ + ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR); +} + +static void ks8842_enable_rx(struct ks8842_adapter *adapter) +{ + ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR); +} + +static void ks8842_disable_rx(struct ks8842_adapter *adapter) +{ + ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR); +} + +static void ks8842_reset_hw(struct ks8842_adapter *adapter) +{ + /* reset the HW */ + ks8842_reset(adapter); + + /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */ + ks8842_write16(adapter, 16, 0x000E, REG_TXCR); + + /* enable the receiver, uni + multi + broadcast + flow ctrl + + crc strip */ + ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400, + REG_RXCR); + + /* TX frame pointer autoincrement */ + ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR); + + /* RX frame pointer autoincrement */ + ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR); + + /* RX 2 kb high watermark */ + ks8842_write16(adapter, 0, 0x1000, REG_QRFCR); + + /* aggressive back off in half duplex */ + ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1); + + /* enable no excessive collison drop */ + ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2); + + /* Enable port 1 force flow control / back pressure / transmit / recv */ + ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2); + + /* restart port auto-negotiation */ + ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); + + /* Enable the transmitter */ + ks8842_enable_tx(adapter); + + /* Enable the receiver */ + ks8842_enable_rx(adapter); + + /* clear all interrupts */ + ks8842_write16(adapter, 18, 0xffff, REG_ISR); + + /* enable interrupts */ + if (KS8842_USE_DMA(adapter)) { + /* When running in DMA Mode the RX interrupt is not enabled in + timberdale because RX data is received by DMA callbacks + it must still be enabled in the KS8842 because it indicates + to timberdale when there is RX data for it's DMA FIFOs */ + iowrite16(ENABLED_IRQS_DMA_IP, adapter->hw_addr + REG_TIMB_IER); + ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); + } else { + if (!(adapter->conf_flags & MICREL_KS884X)) + iowrite16(ENABLED_IRQS, + adapter->hw_addr + REG_TIMB_IER); + ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); + } + /* enable the switch */ + ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE); +} + +static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) +{ + int i; + u16 mac; + + for (i = 0; i < ETH_ALEN; i++) + dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); + + if (adapter->conf_flags & MICREL_KS884X) { + /* + the sequence of saving mac addr between MAC and Switch is + different. + */ + + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR1); + } else { + + /* make sure the switch port uses the same MAC as the QMU */ + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR1); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + } +} + +static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) +{ + unsigned long flags; + unsigned i; + + spin_lock_irqsave(&adapter->lock, flags); + for (i = 0; i < ETH_ALEN; i++) { + ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); + if (!(adapter->conf_flags & MICREL_KS884X)) + ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], + REG_MACAR1 + i); + } + + if (adapter->conf_flags & MICREL_KS884X) { + /* + the sequence of saving mac addr between MAC and Switch is + different. + */ + + u16 mac; + + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR1); + } + spin_unlock_irqrestore(&adapter->lock, flags); +} + +static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter) +{ + return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff; +} + +static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; + u8 *buf = ctl->buf; + + if (ctl->adesc) { + netdev_dbg(netdev, "%s: TX ongoing\n", __func__); + /* transfer ongoing */ + return NETDEV_TX_BUSY; + } + + sg_dma_len(&ctl->sg) = skb->len + sizeof(u32); + + /* copy data to the TX buffer */ + /* the control word, enable IRQ, port 1 and the length */ + *buf++ = 0x00; + *buf++ = 0x01; /* Port 1 */ + *buf++ = skb->len & 0xff; + *buf++ = (skb->len >> 8) & 0xff; + skb_copy_from_linear_data(skb, buf, skb->len); + + dma_sync_single_range_for_device(adapter->dev, + sg_dma_address(&ctl->sg), 0, sg_dma_len(&ctl->sg), + DMA_TO_DEVICE); + + /* make sure the length is a multiple of 4 */ + if (sg_dma_len(&ctl->sg) % 4) + sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4; + + ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, + &ctl->sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); + if (!ctl->adesc) + return NETDEV_TX_BUSY; + + ctl->adesc->callback_param = netdev; + ctl->adesc->callback = ks8842_dma_tx_cb; + ctl->adesc->tx_submit(ctl->adesc); + + netdev->stats.tx_bytes += skb->len; + + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + int len = skb->len; + + netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n", + __func__, skb->len, skb->head, skb->data, + skb_tail_pointer(skb), skb_end_pointer(skb)); + + /* check FIFO buffer space, we need space for CRC and command bits */ + if (ks8842_tx_fifo_space(adapter) < len + 8) + return NETDEV_TX_BUSY; + + if (adapter->conf_flags & KS884X_16BIT) { + u16 *ptr16 = (u16 *)skb->data; + ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO); + ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI); + netdev->stats.tx_bytes += len; + + /* copy buffer */ + while (len > 0) { + iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO); + iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI); + len -= sizeof(u32); + } + } else { + + u32 *ptr = (u32 *)skb->data; + u32 ctrl; + /* the control word, enable IRQ, port 1 and the length */ + ctrl = 0x8000 | 0x100 | (len << 16); + ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); + + netdev->stats.tx_bytes += len; + + /* copy buffer */ + while (len > 0) { + iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); + len -= sizeof(u32); + ptr++; + } + } + + /* enqueue packet */ + ks8842_write16(adapter, 17, 1, REG_TXQCR); + + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static void ks8842_update_rx_err_counters(struct net_device *netdev, u32 status) +{ + netdev_dbg(netdev, "RX error, status: %x\n", status); + + netdev->stats.rx_errors++; + if (status & RXSR_TOO_LONG) + netdev->stats.rx_length_errors++; + if (status & RXSR_CRC_ERROR) + netdev->stats.rx_crc_errors++; + if (status & RXSR_RUNT) + netdev->stats.rx_frame_errors++; +} + +static void ks8842_update_rx_counters(struct net_device *netdev, u32 status, + int len) +{ + netdev_dbg(netdev, "RX packet, len: %d\n", len); + + netdev->stats.rx_packets++; + netdev->stats.rx_bytes += len; + if (status & RXSR_MULTICAST) + netdev->stats.multicast++; +} + +static int __ks8842_start_new_rx_dma(struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; + struct scatterlist *sg = &ctl->sg; + int err; + + ctl->skb = netdev_alloc_skb(netdev, DMA_BUFFER_SIZE); + if (ctl->skb) { + sg_init_table(sg, 1); + sg_dma_address(sg) = dma_map_single(adapter->dev, + ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); + err = dma_mapping_error(adapter->dev, sg_dma_address(sg)); + if (unlikely(err)) { + sg_dma_address(sg) = 0; + goto out; + } + + sg_dma_len(sg) = DMA_BUFFER_SIZE; + + ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, + sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); + + if (!ctl->adesc) + goto out; + + ctl->adesc->callback_param = netdev; + ctl->adesc->callback = ks8842_dma_rx_cb; + ctl->adesc->tx_submit(ctl->adesc); + } else { + err = -ENOMEM; + sg_dma_address(sg) = 0; + goto out; + } + + return err; +out: + if (sg_dma_address(sg)) + dma_unmap_single(adapter->dev, sg_dma_address(sg), + DMA_BUFFER_SIZE, DMA_FROM_DEVICE); + sg_dma_address(sg) = 0; + if (ctl->skb) + dev_kfree_skb(ctl->skb); + + ctl->skb = NULL; + + printk(KERN_ERR DRV_NAME": Failed to start RX DMA: %d\n", err); + return err; +} + +static void ks8842_rx_frame_dma_tasklet(unsigned long arg) +{ + struct net_device *netdev = (struct net_device *)arg; + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; + struct sk_buff *skb = ctl->skb; + dma_addr_t addr = sg_dma_address(&ctl->sg); + u32 status; + + ctl->adesc = NULL; + + /* kick next transfer going */ + __ks8842_start_new_rx_dma(netdev); + + /* now handle the data we got */ + dma_unmap_single(adapter->dev, addr, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); + + status = *((u32 *)skb->data); + + netdev_dbg(netdev, "%s - rx_data: status: %x\n", + __func__, status & 0xffff); + + /* check the status */ + if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { + int len = (status >> 16) & 0x7ff; + + ks8842_update_rx_counters(netdev, status, len); + + /* reserve 4 bytes which is the status word */ + skb_reserve(skb, 4); + skb_put(skb, len); + + skb->protocol = eth_type_trans(skb, netdev); + netif_rx(skb); + } else { + ks8842_update_rx_err_counters(netdev, status); + dev_kfree_skb(skb); + } +} + +static void ks8842_rx_frame(struct net_device *netdev, + struct ks8842_adapter *adapter) +{ + u32 status; + int len; + + if (adapter->conf_flags & KS884X_16BIT) { + status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO); + len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI); + netdev_dbg(netdev, "%s - rx_data: status: %x\n", + __func__, status); + } else { + status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); + len = (status >> 16) & 0x7ff; + status &= 0xffff; + netdev_dbg(netdev, "%s - rx_data: status: %x\n", + __func__, status); + } + + /* check the status */ + if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { + struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len + 3); + + if (skb) { + + ks8842_update_rx_counters(netdev, status, len); + + if (adapter->conf_flags & KS884X_16BIT) { + u16 *data16 = (u16 *)skb_put(skb, len); + ks8842_select_bank(adapter, 17); + while (len > 0) { + *data16++ = ioread16(adapter->hw_addr + + REG_QMU_DATA_LO); + *data16++ = ioread16(adapter->hw_addr + + REG_QMU_DATA_HI); + len -= sizeof(u32); + } + } else { + u32 *data = (u32 *)skb_put(skb, len); + + ks8842_select_bank(adapter, 17); + while (len > 0) { + *data++ = ioread32(adapter->hw_addr + + REG_QMU_DATA_LO); + len -= sizeof(u32); + } + } + skb->protocol = eth_type_trans(skb, netdev); + netif_rx(skb); + } else + netdev->stats.rx_dropped++; + } else + ks8842_update_rx_err_counters(netdev, status); + + /* set high watermark to 3K */ + ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR); + + /* release the frame */ + ks8842_write16(adapter, 17, 0x01, REG_RXQCR); + + /* set high watermark to 2K */ + ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR); +} + +static void ks8842_handle_rx(struct net_device *netdev, + struct ks8842_adapter *adapter) +{ + u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; + netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data); + while (rx_data) { + ks8842_rx_frame(netdev, adapter); + rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; + } +} + +static void ks8842_handle_tx(struct net_device *netdev, + struct ks8842_adapter *adapter) +{ + u16 sr = ks8842_read16(adapter, 16, REG_TXSR); + netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr); + netdev->stats.tx_packets++; + if (netif_queue_stopped(netdev)) + netif_wake_queue(netdev); +} + +static void ks8842_handle_rx_overrun(struct net_device *netdev, + struct ks8842_adapter *adapter) +{ + netdev_dbg(netdev, "%s: entry\n", __func__); + netdev->stats.rx_errors++; + netdev->stats.rx_fifo_errors++; +} + +static void ks8842_tasklet(unsigned long arg) +{ + struct net_device *netdev = (struct net_device *)arg; + struct ks8842_adapter *adapter = netdev_priv(netdev); + u16 isr; + unsigned long flags; + u16 entry_bank; + + /* read current bank to be able to set it back */ + spin_lock_irqsave(&adapter->lock, flags); + entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); + spin_unlock_irqrestore(&adapter->lock, flags); + + isr = ks8842_read16(adapter, 18, REG_ISR); + netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); + + /* when running in DMA mode, do not ack RX interrupts, it is handled + internally by timberdale, otherwise it's DMA FIFO:s would stop + */ + if (KS8842_USE_DMA(adapter)) + isr &= ~IRQ_RX; + + /* Ack */ + ks8842_write16(adapter, 18, isr, REG_ISR); + + if (!(adapter->conf_flags & MICREL_KS884X)) + /* Ack in the timberdale IP as well */ + iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR); + + if (!netif_running(netdev)) + return; + + if (isr & IRQ_LINK_CHANGE) + ks8842_update_link_status(netdev, adapter); + + /* should not get IRQ_RX when running DMA mode */ + if (isr & (IRQ_RX | IRQ_RX_ERROR) && !KS8842_USE_DMA(adapter)) + ks8842_handle_rx(netdev, adapter); + + /* should only happen when in PIO mode */ + if (isr & IRQ_TX) + ks8842_handle_tx(netdev, adapter); + + if (isr & IRQ_RX_OVERRUN) + ks8842_handle_rx_overrun(netdev, adapter); + + if (isr & IRQ_TX_STOPPED) { + ks8842_disable_tx(adapter); + ks8842_enable_tx(adapter); + } + + if (isr & IRQ_RX_STOPPED) { + ks8842_disable_rx(adapter); + ks8842_enable_rx(adapter); + } + + /* re-enable interrupts, put back the bank selection register */ + spin_lock_irqsave(&adapter->lock, flags); + if (KS8842_USE_DMA(adapter)) + ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); + else + ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); + iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); + + /* Make sure timberdale continues DMA operations, they are stopped while + we are handling the ks8842 because we might change bank */ + if (KS8842_USE_DMA(adapter)) + ks8842_resume_dma(adapter); + + spin_unlock_irqrestore(&adapter->lock, flags); +} + +static irqreturn_t ks8842_irq(int irq, void *devid) +{ + struct net_device *netdev = devid; + struct ks8842_adapter *adapter = netdev_priv(netdev); + u16 isr; + u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); + irqreturn_t ret = IRQ_NONE; + + isr = ks8842_read16(adapter, 18, REG_ISR); + netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); + + if (isr) { + if (KS8842_USE_DMA(adapter)) + /* disable all but RX IRQ, since the FPGA relies on it*/ + ks8842_write16(adapter, 18, IRQ_RX, REG_IER); + else + /* disable IRQ */ + ks8842_write16(adapter, 18, 0x00, REG_IER); + + /* schedule tasklet */ + tasklet_schedule(&adapter->tasklet); + + ret = IRQ_HANDLED; + } + + iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); + + /* After an interrupt, tell timberdale to continue DMA operations. + DMA is disabled while we are handling the ks8842 because we might + change bank */ + ks8842_resume_dma(adapter); + + return ret; +} + +static void ks8842_dma_rx_cb(void *data) +{ + struct net_device *netdev = data; + struct ks8842_adapter *adapter = netdev_priv(netdev); + + netdev_dbg(netdev, "RX DMA finished\n"); + /* schedule tasklet */ + if (adapter->dma_rx.adesc) + tasklet_schedule(&adapter->dma_rx.tasklet); +} + +static void ks8842_dma_tx_cb(void *data) +{ + struct net_device *netdev = data; + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; + + netdev_dbg(netdev, "TX DMA finished\n"); + + if (!ctl->adesc) + return; + + netdev->stats.tx_packets++; + ctl->adesc = NULL; + + if (netif_queue_stopped(netdev)) + netif_wake_queue(netdev); +} + +static void ks8842_stop_dma(struct ks8842_adapter *adapter) +{ + struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; + struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; + + tx_ctl->adesc = NULL; + if (tx_ctl->chan) + tx_ctl->chan->device->device_control(tx_ctl->chan, + DMA_TERMINATE_ALL, 0); + + rx_ctl->adesc = NULL; + if (rx_ctl->chan) + rx_ctl->chan->device->device_control(rx_ctl->chan, + DMA_TERMINATE_ALL, 0); + + if (sg_dma_address(&rx_ctl->sg)) + dma_unmap_single(adapter->dev, sg_dma_address(&rx_ctl->sg), + DMA_BUFFER_SIZE, DMA_FROM_DEVICE); + sg_dma_address(&rx_ctl->sg) = 0; + + dev_kfree_skb(rx_ctl->skb); + rx_ctl->skb = NULL; +} + +static void ks8842_dealloc_dma_bufs(struct ks8842_adapter *adapter) +{ + struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; + struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; + + ks8842_stop_dma(adapter); + + if (tx_ctl->chan) + dma_release_channel(tx_ctl->chan); + tx_ctl->chan = NULL; + + if (rx_ctl->chan) + dma_release_channel(rx_ctl->chan); + rx_ctl->chan = NULL; + + tasklet_kill(&rx_ctl->tasklet); + + if (sg_dma_address(&tx_ctl->sg)) + dma_unmap_single(adapter->dev, sg_dma_address(&tx_ctl->sg), + DMA_BUFFER_SIZE, DMA_TO_DEVICE); + sg_dma_address(&tx_ctl->sg) = 0; + + kfree(tx_ctl->buf); + tx_ctl->buf = NULL; +} + +static bool ks8842_dma_filter_fn(struct dma_chan *chan, void *filter_param) +{ + return chan->chan_id == (long)filter_param; +} + +static int ks8842_alloc_dma_bufs(struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; + struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; + int err; + + dma_cap_mask_t mask; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_cap_set(DMA_PRIVATE, mask); + + sg_init_table(&tx_ctl->sg, 1); + + tx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, + (void *)(long)tx_ctl->channel); + if (!tx_ctl->chan) { + err = -ENODEV; + goto err; + } + + /* allocate DMA buffer */ + tx_ctl->buf = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL); + if (!tx_ctl->buf) { + err = -ENOMEM; + goto err; + } + + sg_dma_address(&tx_ctl->sg) = dma_map_single(adapter->dev, + tx_ctl->buf, DMA_BUFFER_SIZE, DMA_TO_DEVICE); + err = dma_mapping_error(adapter->dev, + sg_dma_address(&tx_ctl->sg)); + if (err) { + sg_dma_address(&tx_ctl->sg) = 0; + goto err; + } + + rx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, + (void *)(long)rx_ctl->channel); + if (!rx_ctl->chan) { + err = -ENODEV; + goto err; + } + + tasklet_init(&rx_ctl->tasklet, ks8842_rx_frame_dma_tasklet, + (unsigned long)netdev); + + return 0; +err: + ks8842_dealloc_dma_bufs(adapter); + return err; +} + +/* Netdevice operations */ + +static int ks8842_open(struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + int err; + + netdev_dbg(netdev, "%s - entry\n", __func__); + + if (KS8842_USE_DMA(adapter)) { + err = ks8842_alloc_dma_bufs(netdev); + + if (!err) { + /* start RX dma */ + err = __ks8842_start_new_rx_dma(netdev); + if (err) + ks8842_dealloc_dma_bufs(adapter); + } + + if (err) { + printk(KERN_WARNING DRV_NAME + ": Failed to initiate DMA, running PIO\n"); + ks8842_dealloc_dma_bufs(adapter); + adapter->dma_rx.channel = -1; + adapter->dma_tx.channel = -1; + } + } + + /* reset the HW */ + ks8842_reset_hw(adapter); + + ks8842_write_mac_addr(adapter, netdev->dev_addr); + + ks8842_update_link_status(netdev, adapter); + + err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME, + netdev); + if (err) { + pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err); + return err; + } + + return 0; +} + +static int ks8842_close(struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + + netdev_dbg(netdev, "%s - entry\n", __func__); + + cancel_work_sync(&adapter->timeout_work); + + if (KS8842_USE_DMA(adapter)) + ks8842_dealloc_dma_bufs(adapter); + + /* free the irq */ + free_irq(adapter->irq, netdev); + + /* disable the switch */ + ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE); + + return 0; +} + +static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb, + struct net_device *netdev) +{ + int ret; + struct ks8842_adapter *adapter = netdev_priv(netdev); + + netdev_dbg(netdev, "%s: entry\n", __func__); + + if (KS8842_USE_DMA(adapter)) { + unsigned long flags; + ret = ks8842_tx_frame_dma(skb, netdev); + /* for now only allow one transfer at the time */ + spin_lock_irqsave(&adapter->lock, flags); + if (adapter->dma_tx.adesc) + netif_stop_queue(netdev); + spin_unlock_irqrestore(&adapter->lock, flags); + return ret; + } + + ret = ks8842_tx_frame(skb, netdev); + + if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8) + netif_stop_queue(netdev); + + return ret; +} + +static int ks8842_set_mac(struct net_device *netdev, void *p) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct sockaddr *addr = p; + char *mac = (u8 *)addr->sa_data; + + netdev_dbg(netdev, "%s: entry\n", __func__); + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(netdev->dev_addr, mac, netdev->addr_len); + + ks8842_write_mac_addr(adapter, mac); + return 0; +} + +static void ks8842_tx_timeout_work(struct work_struct *work) +{ + struct ks8842_adapter *adapter = + container_of(work, struct ks8842_adapter, timeout_work); + struct net_device *netdev = adapter->netdev; + unsigned long flags; + + netdev_dbg(netdev, "%s: entry\n", __func__); + + spin_lock_irqsave(&adapter->lock, flags); + + if (KS8842_USE_DMA(adapter)) + ks8842_stop_dma(adapter); + + /* disable interrupts */ + ks8842_write16(adapter, 18, 0, REG_IER); + ks8842_write16(adapter, 18, 0xFFFF, REG_ISR); + + netif_stop_queue(netdev); + + spin_unlock_irqrestore(&adapter->lock, flags); + + ks8842_reset_hw(adapter); + + ks8842_write_mac_addr(adapter, netdev->dev_addr); + + ks8842_update_link_status(netdev, adapter); + + if (KS8842_USE_DMA(adapter)) + __ks8842_start_new_rx_dma(netdev); +} + +static void ks8842_tx_timeout(struct net_device *netdev) +{ + struct ks8842_adapter *adapter = netdev_priv(netdev); + + netdev_dbg(netdev, "%s: entry\n", __func__); + + schedule_work(&adapter->timeout_work); +} + +static const struct net_device_ops ks8842_netdev_ops = { + .ndo_open = ks8842_open, + .ndo_stop = ks8842_close, + .ndo_start_xmit = ks8842_xmit_frame, + .ndo_set_mac_address = ks8842_set_mac, + .ndo_tx_timeout = ks8842_tx_timeout, + .ndo_validate_addr = eth_validate_addr +}; + +static const struct ethtool_ops ks8842_ethtool_ops = { + .get_link = ethtool_op_get_link, +}; + +static int ks8842_probe(struct platform_device *pdev) +{ + int err = -ENOMEM; + struct resource *iomem; + struct net_device *netdev; + struct ks8842_adapter *adapter; + struct ks8842_platform_data *pdata = dev_get_platdata(&pdev->dev); + u16 id; + unsigned i; + + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) + goto err_mem_region; + + netdev = alloc_etherdev(sizeof(struct ks8842_adapter)); + if (!netdev) + goto err_alloc_etherdev; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + adapter = netdev_priv(netdev); + adapter->netdev = netdev; + INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work); + adapter->hw_addr = ioremap(iomem->start, resource_size(iomem)); + adapter->conf_flags = iomem->flags; + + if (!adapter->hw_addr) + goto err_ioremap; + + adapter->irq = platform_get_irq(pdev, 0); + if (adapter->irq < 0) { + err = adapter->irq; + goto err_get_irq; + } + + adapter->dev = (pdev->dev.parent) ? pdev->dev.parent : &pdev->dev; + + /* DMA is only supported when accessed via timberdale */ + if (!(adapter->conf_flags & MICREL_KS884X) && pdata && + (pdata->tx_dma_channel != -1) && + (pdata->rx_dma_channel != -1)) { + adapter->dma_rx.channel = pdata->rx_dma_channel; + adapter->dma_tx.channel = pdata->tx_dma_channel; + } else { + adapter->dma_rx.channel = -1; + adapter->dma_tx.channel = -1; + } + + tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev); + spin_lock_init(&adapter->lock); + + netdev->netdev_ops = &ks8842_netdev_ops; + netdev->ethtool_ops = &ks8842_ethtool_ops; + + /* Check if a mac address was given */ + i = netdev->addr_len; + if (pdata) { + for (i = 0; i < netdev->addr_len; i++) + if (pdata->macaddr[i] != 0) + break; + + if (i < netdev->addr_len) + /* an address was passed, use it */ + memcpy(netdev->dev_addr, pdata->macaddr, + netdev->addr_len); + } + + if (i == netdev->addr_len) { + ks8842_read_mac_addr(adapter, netdev->dev_addr); + + if (!is_valid_ether_addr(netdev->dev_addr)) + eth_hw_addr_random(netdev); + } + + id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE); + + strcpy(netdev->name, "eth%d"); + err = register_netdev(netdev); + if (err) + goto err_register; + + platform_set_drvdata(pdev, netdev); + + pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n", + (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); + + return 0; + +err_register: +err_get_irq: + iounmap(adapter->hw_addr); +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + release_mem_region(iomem->start, resource_size(iomem)); +err_mem_region: + return err; +} + +static int ks8842_remove(struct platform_device *pdev) +{ + struct net_device *netdev = platform_get_drvdata(pdev); + struct ks8842_adapter *adapter = netdev_priv(netdev); + struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + unregister_netdev(netdev); + tasklet_kill(&adapter->tasklet); + iounmap(adapter->hw_addr); + free_netdev(netdev); + release_mem_region(iomem->start, resource_size(iomem)); + return 0; +} + + +static struct platform_driver ks8842_platform_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, + .probe = ks8842_probe, + .remove = ks8842_remove, +}; + +module_platform_driver(ks8842_platform_driver); + +MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver"); +MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:ks8842"); + diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c new file mode 100644 index 00000000000..66d4ab703f4 --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8851.c @@ -0,0 +1,1623 @@ +/* drivers/net/ethernet/micrel/ks8851.c + * + * Copyright 2009 Simtec Electronics + * http://www.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define DEBUG + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/cache.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/eeprom_93cx6.h> +#include <linux/regulator/consumer.h> + +#include <linux/spi/spi.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> + +#include "ks8851.h" + +/** + * struct ks8851_rxctrl - KS8851 driver rx control + * @mchash: Multicast hash-table data. + * @rxcr1: KS_RXCR1 register setting + * @rxcr2: KS_RXCR2 register setting + * + * Representation of the settings needs to control the receive filtering + * such as the multicast hash-filter and the receive register settings. This + * is used to make the job of working out if the receive settings change and + * then issuing the new settings to the worker that will send the necessary + * commands. + */ +struct ks8851_rxctrl { + u16 mchash[4]; + u16 rxcr1; + u16 rxcr2; +}; + +/** + * union ks8851_tx_hdr - tx header data + * @txb: The header as bytes + * @txw: The header as 16bit, little-endian words + * + * A dual representation of the tx header data to allow + * access to individual bytes, and to allow 16bit accesses + * with 16bit alignment. + */ +union ks8851_tx_hdr { + u8 txb[6]; + __le16 txw[3]; +}; + +/** + * struct ks8851_net - KS8851 driver private data + * @netdev: The network device we're bound to + * @spidev: The spi device we're bound to. + * @lock: Lock to ensure that the device is not accessed when busy. + * @statelock: Lock on this structure for tx list. + * @mii: The MII state information for the mii calls. + * @rxctrl: RX settings for @rxctrl_work. + * @tx_work: Work queue for tx packets + * @rxctrl_work: Work queue for updating RX mode and multicast lists + * @txq: Queue of packets for transmission. + * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. + * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. + * @txh: Space for generating packet TX header in DMA-able data + * @rxd: Space for receiving SPI data, in DMA-able space. + * @txd: Space for transmitting SPI data, in DMA-able space. + * @msg_enable: The message flags controlling driver output (see ethtool). + * @fid: Incrementing frame id tag. + * @rc_ier: Cached copy of KS_IER. + * @rc_ccr: Cached copy of KS_CCR. + * @rc_rxqcr: Cached copy of KS_RXQCR. + * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom + * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. + * @vdd_reg: Optional regulator supplying the chip + * @vdd_io: Optional digital power supply for IO + * @gpio: Optional reset_n gpio + * + * The @lock ensures that the chip is protected when certain operations are + * in progress. When the read or write packet transfer is in progress, most + * of the chip registers are not ccessible until the transfer is finished and + * the DMA has been de-asserted. + * + * The @statelock is used to protect information in the structure which may + * need to be accessed via several sources, such as the network driver layer + * or one of the work queues. + * + * We align the buffers we may use for rx/tx to ensure that if the SPI driver + * wants to DMA map them, it will not have any problems with data the driver + * modifies. + */ +struct ks8851_net { + struct net_device *netdev; + struct spi_device *spidev; + struct mutex lock; + spinlock_t statelock; + + union ks8851_tx_hdr txh ____cacheline_aligned; + u8 rxd[8]; + u8 txd[8]; + + u32 msg_enable ____cacheline_aligned; + u16 tx_space; + u8 fid; + + u16 rc_ier; + u16 rc_rxqcr; + u16 rc_ccr; + u16 eeprom_size; + + struct mii_if_info mii; + struct ks8851_rxctrl rxctrl; + + struct work_struct tx_work; + struct work_struct rxctrl_work; + + struct sk_buff_head txq; + + struct spi_message spi_msg1; + struct spi_message spi_msg2; + struct spi_transfer spi_xfer1; + struct spi_transfer spi_xfer2[2]; + + struct eeprom_93cx6 eeprom; + struct regulator *vdd_reg; + struct regulator *vdd_io; + int gpio; +}; + +static int msg_enable; + +/* shift for byte-enable data */ +#define BYTE_EN(_x) ((_x) << 2) + +/* turn register number and byte-enable mask into data for start of packet */ +#define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) + +/* SPI register read/write calls. + * + * All these calls issue SPI transactions to access the chip's registers. They + * all require that the necessary lock is held to prevent accesses when the + * chip is busy transferring packet data (RX/TX FIFO accesses). + */ + +/** + * ks8851_wrreg16 - write 16bit register value to chip + * @ks: The chip state + * @reg: The register address + * @val: The value to write + * + * Issue a write to put the value @val into the register specified in @reg. + */ +static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) +{ + struct spi_transfer *xfer = &ks->spi_xfer1; + struct spi_message *msg = &ks->spi_msg1; + __le16 txb[2]; + int ret; + + txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); + txb[1] = cpu_to_le16(val); + + xfer->tx_buf = txb; + xfer->rx_buf = NULL; + xfer->len = 4; + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + netdev_err(ks->netdev, "spi_sync() failed\n"); +} + +/** + * ks8851_wrreg8 - write 8bit register value to chip + * @ks: The chip state + * @reg: The register address + * @val: The value to write + * + * Issue a write to put the value @val into the register specified in @reg. + */ +static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) +{ + struct spi_transfer *xfer = &ks->spi_xfer1; + struct spi_message *msg = &ks->spi_msg1; + __le16 txb[2]; + int ret; + int bit; + + bit = 1 << (reg & 3); + + txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); + txb[1] = val; + + xfer->tx_buf = txb; + xfer->rx_buf = NULL; + xfer->len = 3; + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + netdev_err(ks->netdev, "spi_sync() failed\n"); +} + +/** + * ks8851_rx_1msg - select whether to use one or two messages for spi read + * @ks: The device structure + * + * Return whether to generate a single message with a tx and rx buffer + * supplied to spi_sync(), or alternatively send the tx and rx buffers + * as separate messages. + * + * Depending on the hardware in use, a single message may be more efficient + * on interrupts or work done by the driver. + * + * This currently always returns true until we add some per-device data passed + * from the platform code to specify which mode is better. + */ +static inline bool ks8851_rx_1msg(struct ks8851_net *ks) +{ + return true; +} + +/** + * ks8851_rdreg - issue read register command and return the data + * @ks: The device state + * @op: The register address and byte enables in message format. + * @rxb: The RX buffer to return the result into + * @rxl: The length of data expected. + * + * This is the low level read call that issues the necessary spi message(s) + * to read data from the register specified in @op. + */ +static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, + u8 *rxb, unsigned rxl) +{ + struct spi_transfer *xfer; + struct spi_message *msg; + __le16 *txb = (__le16 *)ks->txd; + u8 *trx = ks->rxd; + int ret; + + txb[0] = cpu_to_le16(op | KS_SPIOP_RD); + + if (ks8851_rx_1msg(ks)) { + msg = &ks->spi_msg1; + xfer = &ks->spi_xfer1; + + xfer->tx_buf = txb; + xfer->rx_buf = trx; + xfer->len = rxl + 2; + } else { + msg = &ks->spi_msg2; + xfer = ks->spi_xfer2; + + xfer->tx_buf = txb; + xfer->rx_buf = NULL; + xfer->len = 2; + + xfer++; + xfer->tx_buf = NULL; + xfer->rx_buf = trx; + xfer->len = rxl; + } + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + netdev_err(ks->netdev, "read: spi_sync() failed\n"); + else if (ks8851_rx_1msg(ks)) + memcpy(rxb, trx + 2, rxl); + else + memcpy(rxb, trx, rxl); +} + +/** + * ks8851_rdreg8 - read 8 bit register from device + * @ks: The chip information + * @reg: The register address + * + * Read a 8bit register from the chip, returning the result +*/ +static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) +{ + u8 rxb[1]; + + ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); + return rxb[0]; +} + +/** + * ks8851_rdreg16 - read 16 bit register from device + * @ks: The chip information + * @reg: The register address + * + * Read a 16bit register from the chip, returning the result +*/ +static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) +{ + __le16 rx = 0; + + ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); + return le16_to_cpu(rx); +} + +/** + * ks8851_rdreg32 - read 32 bit register from device + * @ks: The chip information + * @reg: The register address + * + * Read a 32bit register from the chip. + * + * Note, this read requires the address be aligned to 4 bytes. +*/ +static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) +{ + __le32 rx = 0; + + WARN_ON(reg & 3); + + ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); + return le32_to_cpu(rx); +} + +/** + * ks8851_soft_reset - issue one of the soft reset to the device + * @ks: The device state. + * @op: The bit(s) to set in the GRR + * + * Issue the relevant soft-reset command to the device's GRR register + * specified by @op. + * + * Note, the delays are in there as a caution to ensure that the reset + * has time to take effect and then complete. Since the datasheet does + * not currently specify the exact sequence, we have chosen something + * that seems to work with our device. + */ +static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) +{ + ks8851_wrreg16(ks, KS_GRR, op); + mdelay(1); /* wait a short time to effect reset */ + ks8851_wrreg16(ks, KS_GRR, 0); + mdelay(1); /* wait for condition to clear */ +} + +/** + * ks8851_set_powermode - set power mode of the device + * @ks: The device state + * @pwrmode: The power mode value to write to KS_PMECR. + * + * Change the power mode of the chip. + */ +static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) +{ + unsigned pmecr; + + netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); + + pmecr = ks8851_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_PM_MASK; + pmecr |= pwrmode; + + ks8851_wrreg16(ks, KS_PMECR, pmecr); +} + +/** + * ks8851_write_mac_addr - write mac address to device registers + * @dev: The network device + * + * Update the KS8851 MAC address registers from the address in @dev. + * + * This call assumes that the chip is not running, so there is no need to + * shutdown the RXQ process whilst setting this. +*/ +static int ks8851_write_mac_addr(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + int i; + + mutex_lock(&ks->lock); + + /* + * Wake up chip in case it was powered off when stopped; otherwise, + * the first write to the MAC address does not take effect. + */ + ks8851_set_powermode(ks, PMECR_PM_NORMAL); + for (i = 0; i < ETH_ALEN; i++) + ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); + if (!netif_running(dev)) + ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); + + mutex_unlock(&ks->lock); + + return 0; +} + +/** + * ks8851_read_mac_addr - read mac address from device registers + * @dev: The network device + * + * Update our copy of the KS8851 MAC address from the registers of @dev. +*/ +static void ks8851_read_mac_addr(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + int i; + + mutex_lock(&ks->lock); + + for (i = 0; i < ETH_ALEN; i++) + dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); + + mutex_unlock(&ks->lock); +} + +/** + * ks8851_init_mac - initialise the mac address + * @ks: The device structure + * + * Get or create the initial mac address for the device and then set that + * into the station address register. If there is an EEPROM present, then + * we try that. If no valid mac address is found we use eth_random_addr() + * to create a new one. + */ +static void ks8851_init_mac(struct ks8851_net *ks) +{ + struct net_device *dev = ks->netdev; + + /* first, try reading what we've got already */ + if (ks->rc_ccr & CCR_EEPROM) { + ks8851_read_mac_addr(dev); + if (is_valid_ether_addr(dev->dev_addr)) + return; + + netdev_err(ks->netdev, "invalid mac address read %pM\n", + dev->dev_addr); + } + + eth_hw_addr_random(dev); + ks8851_write_mac_addr(dev); +} + +/** + * ks8851_rdfifo - read data from the receive fifo + * @ks: The device state. + * @buff: The buffer address + * @len: The length of the data to read + * + * Issue an RXQ FIFO read command and read the @len amount of data from + * the FIFO into the buffer specified by @buff. + */ +static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) +{ + struct spi_transfer *xfer = ks->spi_xfer2; + struct spi_message *msg = &ks->spi_msg2; + u8 txb[1]; + int ret; + + netif_dbg(ks, rx_status, ks->netdev, + "%s: %d@%p\n", __func__, len, buff); + + /* set the operation we're issuing */ + txb[0] = KS_SPIOP_RXFIFO; + + xfer->tx_buf = txb; + xfer->rx_buf = NULL; + xfer->len = 1; + + xfer++; + xfer->rx_buf = buff; + xfer->tx_buf = NULL; + xfer->len = len; + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); +} + +/** + * ks8851_dbg_dumpkkt - dump initial packet contents to debug + * @ks: The device state + * @rxpkt: The data for the received packet + * + * Dump the initial data from the packet to dev_dbg(). +*/ +static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) +{ + netdev_dbg(ks->netdev, + "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", + rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], + rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], + rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); +} + +/** + * ks8851_rx_pkts - receive packets from the host + * @ks: The device information. + * + * This is called from the IRQ work queue when the system detects that there + * are packets in the receive queue. Find out how many packets there are and + * read them from the FIFO. + */ +static void ks8851_rx_pkts(struct ks8851_net *ks) +{ + struct sk_buff *skb; + unsigned rxfc; + unsigned rxlen; + unsigned rxstat; + u32 rxh; + u8 *rxpkt; + + rxfc = ks8851_rdreg8(ks, KS_RXFC); + + netif_dbg(ks, rx_status, ks->netdev, + "%s: %d packets\n", __func__, rxfc); + + /* Currently we're issuing a read per packet, but we could possibly + * improve the code by issuing a single read, getting the receive + * header, allocating the packet and then reading the packet data + * out in one go. + * + * This form of operation would require us to hold the SPI bus' + * chipselect low during the entie transaction to avoid any + * reset to the data stream coming from the chip. + */ + + for (; rxfc != 0; rxfc--) { + rxh = ks8851_rdreg32(ks, KS_RXFHSR); + rxstat = rxh & 0xffff; + rxlen = (rxh >> 16) & 0xfff; + + netif_dbg(ks, rx_status, ks->netdev, + "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); + + /* the length of the packet includes the 32bit CRC */ + + /* set dma read address */ + ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); + + /* start the packet dma process, and set auto-dequeue rx */ + ks8851_wrreg16(ks, KS_RXQCR, + ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); + + if (rxlen > 4) { + unsigned int rxalign; + + rxlen -= 4; + rxalign = ALIGN(rxlen, 4); + skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); + if (skb) { + + /* 4 bytes of status header + 4 bytes of + * garbage: we put them before ethernet + * header, so that they are copied, + * but ignored. + */ + + rxpkt = skb_put(skb, rxlen) - 8; + + ks8851_rdfifo(ks, rxpkt, rxalign + 8); + + if (netif_msg_pktdata(ks)) + ks8851_dbg_dumpkkt(ks, rxpkt); + + skb->protocol = eth_type_trans(skb, ks->netdev); + netif_rx_ni(skb); + + ks->netdev->stats.rx_packets++; + ks->netdev->stats.rx_bytes += rxlen; + } + } + + ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); + } +} + +/** + * ks8851_irq - IRQ handler for dealing with interrupt requests + * @irq: IRQ number + * @_ks: cookie + * + * This handler is invoked when the IRQ line asserts to find out what happened. + * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs + * in thread context. + * + * Read the interrupt status, work out what needs to be done and then clear + * any of the interrupts that are not needed. + */ +static irqreturn_t ks8851_irq(int irq, void *_ks) +{ + struct ks8851_net *ks = _ks; + unsigned status; + unsigned handled = 0; + + mutex_lock(&ks->lock); + + status = ks8851_rdreg16(ks, KS_ISR); + + netif_dbg(ks, intr, ks->netdev, + "%s: status 0x%04x\n", __func__, status); + + if (status & IRQ_LCI) + handled |= IRQ_LCI; + + if (status & IRQ_LDI) { + u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_WKEVT_MASK; + ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); + + handled |= IRQ_LDI; + } + + if (status & IRQ_RXPSI) + handled |= IRQ_RXPSI; + + if (status & IRQ_TXI) { + handled |= IRQ_TXI; + + /* no lock here, tx queue should have been stopped */ + + /* update our idea of how much tx space is available to the + * system */ + ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); + + netif_dbg(ks, intr, ks->netdev, + "%s: txspace %d\n", __func__, ks->tx_space); + } + + if (status & IRQ_RXI) + handled |= IRQ_RXI; + + if (status & IRQ_SPIBEI) { + dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); + handled |= IRQ_SPIBEI; + } + + ks8851_wrreg16(ks, KS_ISR, handled); + + if (status & IRQ_RXI) { + /* the datasheet says to disable the rx interrupt during + * packet read-out, however we're masking the interrupt + * from the device so do not bother masking just the RX + * from the device. */ + + ks8851_rx_pkts(ks); + } + + /* if something stopped the rx process, probably due to wanting + * to change the rx settings, then do something about restarting + * it. */ + if (status & IRQ_RXPSI) { + struct ks8851_rxctrl *rxc = &ks->rxctrl; + + /* update the multicast hash table */ + ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); + ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); + ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); + ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); + + ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); + ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); + } + + mutex_unlock(&ks->lock); + + if (status & IRQ_LCI) + mii_check_link(&ks->mii); + + if (status & IRQ_TXI) + netif_wake_queue(ks->netdev); + + return IRQ_HANDLED; +} + +/** + * calc_txlen - calculate size of message to send packet + * @len: Length of data + * + * Returns the size of the TXFIFO message needed to send + * this packet. + */ +static inline unsigned calc_txlen(unsigned len) +{ + return ALIGN(len + 4, 4); +} + +/** + * ks8851_wrpkt - write packet to TX FIFO + * @ks: The device state. + * @txp: The sk_buff to transmit. + * @irq: IRQ on completion of the packet. + * + * Send the @txp to the chip. This means creating the relevant packet header + * specifying the length of the packet and the other information the chip + * needs, such as IRQ on completion. Send the header and the packet data to + * the device. + */ +static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) +{ + struct spi_transfer *xfer = ks->spi_xfer2; + struct spi_message *msg = &ks->spi_msg2; + unsigned fid = 0; + int ret; + + netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", + __func__, txp, txp->len, txp->data, irq); + + fid = ks->fid++; + fid &= TXFR_TXFID_MASK; + + if (irq) + fid |= TXFR_TXIC; /* irq on completion */ + + /* start header at txb[1] to align txw entries */ + ks->txh.txb[1] = KS_SPIOP_TXFIFO; + ks->txh.txw[1] = cpu_to_le16(fid); + ks->txh.txw[2] = cpu_to_le16(txp->len); + + xfer->tx_buf = &ks->txh.txb[1]; + xfer->rx_buf = NULL; + xfer->len = 5; + + xfer++; + xfer->tx_buf = txp->data; + xfer->rx_buf = NULL; + xfer->len = ALIGN(txp->len, 4); + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); +} + +/** + * ks8851_done_tx - update and then free skbuff after transmitting + * @ks: The device state + * @txb: The buffer transmitted + */ +static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) +{ + struct net_device *dev = ks->netdev; + + dev->stats.tx_bytes += txb->len; + dev->stats.tx_packets++; + + dev_kfree_skb(txb); +} + +/** + * ks8851_tx_work - process tx packet(s) + * @work: The work strucutre what was scheduled. + * + * This is called when a number of packets have been scheduled for + * transmission and need to be sent to the device. + */ +static void ks8851_tx_work(struct work_struct *work) +{ + struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); + struct sk_buff *txb; + bool last = skb_queue_empty(&ks->txq); + + mutex_lock(&ks->lock); + + while (!last) { + txb = skb_dequeue(&ks->txq); + last = skb_queue_empty(&ks->txq); + + if (txb != NULL) { + ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); + ks8851_wrpkt(ks, txb, last); + ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); + ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); + + ks8851_done_tx(ks, txb); + } + } + + mutex_unlock(&ks->lock); +} + +/** + * ks8851_net_open - open network device + * @dev: The network device being opened. + * + * Called when the network device is marked active, such as a user executing + * 'ifconfig up' on the device. + */ +static int ks8851_net_open(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + + /* lock the card, even if we may not actually be doing anything + * else at the moment */ + mutex_lock(&ks->lock); + + netif_dbg(ks, ifup, ks->netdev, "opening\n"); + + /* bring chip out of any power saving mode it was in */ + ks8851_set_powermode(ks, PMECR_PM_NORMAL); + + /* issue a soft reset to the RX/TX QMU to put it into a known + * state. */ + ks8851_soft_reset(ks, GRR_QMU); + + /* setup transmission parameters */ + + ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ + TXCR_TXPE | /* pad to min length */ + TXCR_TXCRC | /* add CRC */ + TXCR_TXFCE)); /* enable flow control */ + + /* auto-increment tx data, reset tx pointer */ + ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); + + /* setup receiver control */ + + ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ + RXCR1_RXFCE | /* enable flow control */ + RXCR1_RXBE | /* broadcast enable */ + RXCR1_RXUE | /* unicast enable */ + RXCR1_RXE)); /* enable rx block */ + + /* transfer entire frames out in one go */ + ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); + + /* set receive counter timeouts */ + ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ + ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ + ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ + + ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ + RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ + RXQCR_RXDTTE); /* IRQ on time exceeded */ + + ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); + + /* clear then enable interrupts */ + +#define STD_IRQ (IRQ_LCI | /* Link Change */ \ + IRQ_TXI | /* TX done */ \ + IRQ_RXI | /* RX done */ \ + IRQ_SPIBEI | /* SPI bus error */ \ + IRQ_TXPSI | /* TX process stop */ \ + IRQ_RXPSI) /* RX process stop */ + + ks->rc_ier = STD_IRQ; + ks8851_wrreg16(ks, KS_ISR, STD_IRQ); + ks8851_wrreg16(ks, KS_IER, STD_IRQ); + + netif_start_queue(ks->netdev); + + netif_dbg(ks, ifup, ks->netdev, "network device up\n"); + + mutex_unlock(&ks->lock); + return 0; +} + +/** + * ks8851_net_stop - close network device + * @dev: The device being closed. + * + * Called to close down a network device which has been active. Cancell any + * work, shutdown the RX and TX process and then place the chip into a low + * power state whilst it is not being used. + */ +static int ks8851_net_stop(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + + netif_info(ks, ifdown, dev, "shutting down\n"); + + netif_stop_queue(dev); + + mutex_lock(&ks->lock); + /* turn off the IRQs and ack any outstanding */ + ks8851_wrreg16(ks, KS_IER, 0x0000); + ks8851_wrreg16(ks, KS_ISR, 0xffff); + mutex_unlock(&ks->lock); + + /* stop any outstanding work */ + flush_work(&ks->tx_work); + flush_work(&ks->rxctrl_work); + + mutex_lock(&ks->lock); + /* shutdown RX process */ + ks8851_wrreg16(ks, KS_RXCR1, 0x0000); + + /* shutdown TX process */ + ks8851_wrreg16(ks, KS_TXCR, 0x0000); + + /* set powermode to soft power down to save power */ + ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); + mutex_unlock(&ks->lock); + + /* ensure any queued tx buffers are dumped */ + while (!skb_queue_empty(&ks->txq)) { + struct sk_buff *txb = skb_dequeue(&ks->txq); + + netif_dbg(ks, ifdown, ks->netdev, + "%s: freeing txb %p\n", __func__, txb); + + dev_kfree_skb(txb); + } + + return 0; +} + +/** + * ks8851_start_xmit - transmit packet + * @skb: The buffer to transmit + * @dev: The device used to transmit the packet. + * + * Called by the network layer to transmit the @skb. Queue the packet for + * the device and schedule the necessary work to transmit the packet when + * it is free. + * + * We do this to firstly avoid sleeping with the network device locked, + * and secondly so we can round up more than one packet to transmit which + * means we can try and avoid generating too many transmit done interrupts. + */ +static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + unsigned needed = calc_txlen(skb->len); + netdev_tx_t ret = NETDEV_TX_OK; + + netif_dbg(ks, tx_queued, ks->netdev, + "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); + + spin_lock(&ks->statelock); + + if (needed > ks->tx_space) { + netif_stop_queue(dev); + ret = NETDEV_TX_BUSY; + } else { + ks->tx_space -= needed; + skb_queue_tail(&ks->txq, skb); + } + + spin_unlock(&ks->statelock); + schedule_work(&ks->tx_work); + + return ret; +} + +/** + * ks8851_rxctrl_work - work handler to change rx mode + * @work: The work structure this belongs to. + * + * Lock the device and issue the necessary changes to the receive mode from + * the network device layer. This is done so that we can do this without + * having to sleep whilst holding the network device lock. + * + * Since the recommendation from Micrel is that the RXQ is shutdown whilst the + * receive parameters are programmed, we issue a write to disable the RXQ and + * then wait for the interrupt handler to be triggered once the RXQ shutdown is + * complete. The interrupt handler then writes the new values into the chip. + */ +static void ks8851_rxctrl_work(struct work_struct *work) +{ + struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); + + mutex_lock(&ks->lock); + + /* need to shutdown RXQ before modifying filter parameters */ + ks8851_wrreg16(ks, KS_RXCR1, 0x00); + + mutex_unlock(&ks->lock); +} + +static void ks8851_set_rx_mode(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + struct ks8851_rxctrl rxctrl; + + memset(&rxctrl, 0, sizeof(rxctrl)); + + if (dev->flags & IFF_PROMISC) { + /* interface to receive everything */ + + rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; + } else if (dev->flags & IFF_ALLMULTI) { + /* accept all multicast packets */ + + rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | + RXCR1_RXPAFMA | RXCR1_RXMAFMA); + } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { + struct netdev_hw_addr *ha; + u32 crc; + + /* accept some multicast */ + + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc(ETH_ALEN, ha->addr); + crc >>= (32 - 6); /* get top six bits */ + + rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); + } + + rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; + } else { + /* just accept broadcast / unicast */ + rxctrl.rxcr1 = RXCR1_RXPAFMA; + } + + rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ + RXCR1_RXBE | /* broadcast enable */ + RXCR1_RXE | /* RX process enable */ + RXCR1_RXFCE); /* enable flow control */ + + rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; + + /* schedule work to do the actual set of the data if needed */ + + spin_lock(&ks->statelock); + + if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { + memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); + schedule_work(&ks->rxctrl_work); + } + + spin_unlock(&ks->statelock); +} + +static int ks8851_set_mac_address(struct net_device *dev, void *addr) +{ + struct sockaddr *sa = addr; + + if (netif_running(dev)) + return -EBUSY; + + if (!is_valid_ether_addr(sa->sa_data)) + return -EADDRNOTAVAIL; + + memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); + return ks8851_write_mac_addr(dev); +} + +static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) +{ + struct ks8851_net *ks = netdev_priv(dev); + + if (!netif_running(dev)) + return -EINVAL; + + return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); +} + +static const struct net_device_ops ks8851_netdev_ops = { + .ndo_open = ks8851_net_open, + .ndo_stop = ks8851_net_stop, + .ndo_do_ioctl = ks8851_net_ioctl, + .ndo_start_xmit = ks8851_start_xmit, + .ndo_set_mac_address = ks8851_set_mac_address, + .ndo_set_rx_mode = ks8851_set_rx_mode, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + +/* ethtool support */ + +static void ks8851_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *di) +{ + strlcpy(di->driver, "KS8851", sizeof(di->driver)); + strlcpy(di->version, "1.00", sizeof(di->version)); + strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); +} + +static u32 ks8851_get_msglevel(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + return ks->msg_enable; +} + +static void ks8851_set_msglevel(struct net_device *dev, u32 to) +{ + struct ks8851_net *ks = netdev_priv(dev); + ks->msg_enable = to; +} + +static int ks8851_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ks8851_net *ks = netdev_priv(dev); + return mii_ethtool_gset(&ks->mii, cmd); +} + +static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ks8851_net *ks = netdev_priv(dev); + return mii_ethtool_sset(&ks->mii, cmd); +} + +static u32 ks8851_get_link(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + return mii_link_ok(&ks->mii); +} + +static int ks8851_nway_reset(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + return mii_nway_restart(&ks->mii); +} + +/* EEPROM support */ + +static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee) +{ + struct ks8851_net *ks = ee->data; + unsigned val; + + val = ks8851_rdreg16(ks, KS_EEPCR); + + ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0; + ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0; + ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0; +} + +static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee) +{ + struct ks8851_net *ks = ee->data; + unsigned val = EEPCR_EESA; /* default - eeprom access on */ + + if (ee->drive_data) + val |= EEPCR_EESRWA; + if (ee->reg_data_in) + val |= EEPCR_EEDO; + if (ee->reg_data_clock) + val |= EEPCR_EESCK; + if (ee->reg_chip_select) + val |= EEPCR_EECS; + + ks8851_wrreg16(ks, KS_EEPCR, val); +} + +/** + * ks8851_eeprom_claim - claim device EEPROM and activate the interface + * @ks: The network device state. + * + * Check for the presence of an EEPROM, and then activate software access + * to the device. + */ +static int ks8851_eeprom_claim(struct ks8851_net *ks) +{ + if (!(ks->rc_ccr & CCR_EEPROM)) + return -ENOENT; + + mutex_lock(&ks->lock); + + /* start with clock low, cs high */ + ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS); + return 0; +} + +/** + * ks8851_eeprom_release - release the EEPROM interface + * @ks: The device state + * + * Release the software access to the device EEPROM + */ +static void ks8851_eeprom_release(struct ks8851_net *ks) +{ + unsigned val = ks8851_rdreg16(ks, KS_EEPCR); + + ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA); + mutex_unlock(&ks->lock); +} + +#define KS_EEPROM_MAGIC (0x00008851) + +static int ks8851_set_eeprom(struct net_device *dev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct ks8851_net *ks = netdev_priv(dev); + int offset = ee->offset; + int len = ee->len; + u16 tmp; + + /* currently only support byte writing */ + if (len != 1) + return -EINVAL; + + if (ee->magic != KS_EEPROM_MAGIC) + return -EINVAL; + + if (ks8851_eeprom_claim(ks)) + return -ENOENT; + + eeprom_93cx6_wren(&ks->eeprom, true); + + /* ethtool currently only supports writing bytes, which means + * we have to read/modify/write our 16bit EEPROMs */ + + eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp); + + if (offset & 1) { + tmp &= 0xff; + tmp |= *data << 8; + } else { + tmp &= 0xff00; + tmp |= *data; + } + + eeprom_93cx6_write(&ks->eeprom, offset/2, tmp); + eeprom_93cx6_wren(&ks->eeprom, false); + + ks8851_eeprom_release(ks); + + return 0; +} + +static int ks8851_get_eeprom(struct net_device *dev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct ks8851_net *ks = netdev_priv(dev); + int offset = ee->offset; + int len = ee->len; + + /* must be 2 byte aligned */ + if (len & 1 || offset & 1) + return -EINVAL; + + if (ks8851_eeprom_claim(ks)) + return -ENOENT; + + ee->magic = KS_EEPROM_MAGIC; + + eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); + ks8851_eeprom_release(ks); + + return 0; +} + +static int ks8851_get_eeprom_len(struct net_device *dev) +{ + struct ks8851_net *ks = netdev_priv(dev); + + /* currently, we assume it is an 93C46 attached, so return 128 */ + return ks->rc_ccr & CCR_EEPROM ? 128 : 0; +} + +static const struct ethtool_ops ks8851_ethtool_ops = { + .get_drvinfo = ks8851_get_drvinfo, + .get_msglevel = ks8851_get_msglevel, + .set_msglevel = ks8851_set_msglevel, + .get_settings = ks8851_get_settings, + .set_settings = ks8851_set_settings, + .get_link = ks8851_get_link, + .nway_reset = ks8851_nway_reset, + .get_eeprom_len = ks8851_get_eeprom_len, + .get_eeprom = ks8851_get_eeprom, + .set_eeprom = ks8851_set_eeprom, +}; + +/* MII interface controls */ + +/** + * ks8851_phy_reg - convert MII register into a KS8851 register + * @reg: MII register number. + * + * Return the KS8851 register number for the corresponding MII PHY register + * if possible. Return zero if the MII register has no direct mapping to the + * KS8851 register set. + */ +static int ks8851_phy_reg(int reg) +{ + switch (reg) { + case MII_BMCR: + return KS_P1MBCR; + case MII_BMSR: + return KS_P1MBSR; + case MII_PHYSID1: + return KS_PHY1ILR; + case MII_PHYSID2: + return KS_PHY1IHR; + case MII_ADVERTISE: + return KS_P1ANAR; + case MII_LPA: + return KS_P1ANLPR; + } + + return 0x0; +} + +/** + * ks8851_phy_read - MII interface PHY register read. + * @dev: The network device the PHY is on. + * @phy_addr: Address of PHY (ignored as we only have one) + * @reg: The register to read. + * + * This call reads data from the PHY register specified in @reg. Since the + * device does not support all the MII registers, the non-existent values + * are always returned as zero. + * + * We return zero for unsupported registers as the MII code does not check + * the value returned for any error status, and simply returns it to the + * caller. The mii-tool that the driver was tested with takes any -ve error + * as real PHY capabilities, thus displaying incorrect data to the user. + */ +static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) +{ + struct ks8851_net *ks = netdev_priv(dev); + int ksreg; + int result; + + ksreg = ks8851_phy_reg(reg); + if (!ksreg) + return 0x0; /* no error return allowed, so use zero */ + + mutex_lock(&ks->lock); + result = ks8851_rdreg16(ks, ksreg); + mutex_unlock(&ks->lock); + + return result; +} + +static void ks8851_phy_write(struct net_device *dev, + int phy, int reg, int value) +{ + struct ks8851_net *ks = netdev_priv(dev); + int ksreg; + + ksreg = ks8851_phy_reg(reg); + if (ksreg) { + mutex_lock(&ks->lock); + ks8851_wrreg16(ks, ksreg, value); + mutex_unlock(&ks->lock); + } +} + +/** + * ks8851_read_selftest - read the selftest memory info. + * @ks: The device state + * + * Read and check the TX/RX memory selftest information. + */ +static int ks8851_read_selftest(struct ks8851_net *ks) +{ + unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; + int ret = 0; + unsigned rd; + + rd = ks8851_rdreg16(ks, KS_MBIR); + + if ((rd & both_done) != both_done) { + netdev_warn(ks->netdev, "Memory selftest not finished\n"); + return 0; + } + + if (rd & MBIR_TXMBFA) { + netdev_err(ks->netdev, "TX memory selftest fail\n"); + ret |= 1; + } + + if (rd & MBIR_RXMBFA) { + netdev_err(ks->netdev, "RX memory selftest fail\n"); + ret |= 2; + } + + return 0; +} + +/* driver bus management functions */ + +#ifdef CONFIG_PM_SLEEP + +static int ks8851_suspend(struct device *dev) +{ + struct ks8851_net *ks = dev_get_drvdata(dev); + struct net_device *netdev = ks->netdev; + + if (netif_running(netdev)) { + netif_device_detach(netdev); + ks8851_net_stop(netdev); + } + + return 0; +} + +static int ks8851_resume(struct device *dev) +{ + struct ks8851_net *ks = dev_get_drvdata(dev); + struct net_device *netdev = ks->netdev; + + if (netif_running(netdev)) { + ks8851_net_open(netdev); + netif_device_attach(netdev); + } + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume); + +static int ks8851_probe(struct spi_device *spi) +{ + struct net_device *ndev; + struct ks8851_net *ks; + int ret; + unsigned cider; + int gpio; + + ndev = alloc_etherdev(sizeof(struct ks8851_net)); + if (!ndev) + return -ENOMEM; + + spi->bits_per_word = 8; + + ks = netdev_priv(ndev); + + ks->netdev = ndev; + ks->spidev = spi; + ks->tx_space = 6144; + + gpio = of_get_named_gpio_flags(spi->dev.of_node, "reset-gpios", + 0, NULL); + if (gpio == -EPROBE_DEFER) { + ret = gpio; + goto err_gpio; + } + + ks->gpio = gpio; + if (gpio_is_valid(gpio)) { + ret = devm_gpio_request_one(&spi->dev, gpio, + GPIOF_OUT_INIT_LOW, "ks8851_rst_n"); + if (ret) { + dev_err(&spi->dev, "reset gpio request failed\n"); + goto err_gpio; + } + } + + ks->vdd_io = devm_regulator_get(&spi->dev, "vdd-io"); + if (IS_ERR(ks->vdd_io)) { + ret = PTR_ERR(ks->vdd_io); + goto err_reg_io; + } + + ret = regulator_enable(ks->vdd_io); + if (ret) { + dev_err(&spi->dev, "regulator vdd_io enable fail: %d\n", + ret); + goto err_reg_io; + } + + ks->vdd_reg = devm_regulator_get(&spi->dev, "vdd"); + if (IS_ERR(ks->vdd_reg)) { + ret = PTR_ERR(ks->vdd_reg); + goto err_reg; + } + + ret = regulator_enable(ks->vdd_reg); + if (ret) { + dev_err(&spi->dev, "regulator vdd enable fail: %d\n", + ret); + goto err_reg; + } + + if (gpio_is_valid(gpio)) { + usleep_range(10000, 11000); + gpio_set_value(gpio, 1); + } + + mutex_init(&ks->lock); + spin_lock_init(&ks->statelock); + + INIT_WORK(&ks->tx_work, ks8851_tx_work); + INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); + + /* initialise pre-made spi transfer messages */ + + spi_message_init(&ks->spi_msg1); + spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); + + spi_message_init(&ks->spi_msg2); + spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); + spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); + + /* setup EEPROM state */ + + ks->eeprom.data = ks; + ks->eeprom.width = PCI_EEPROM_WIDTH_93C46; + ks->eeprom.register_read = ks8851_eeprom_regread; + ks->eeprom.register_write = ks8851_eeprom_regwrite; + + /* setup mii state */ + ks->mii.dev = ndev; + ks->mii.phy_id = 1, + ks->mii.phy_id_mask = 1; + ks->mii.reg_num_mask = 0xf; + ks->mii.mdio_read = ks8851_phy_read; + ks->mii.mdio_write = ks8851_phy_write; + + dev_info(&spi->dev, "message enable is %d\n", msg_enable); + + /* set the default message enable */ + ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | + NETIF_MSG_PROBE | + NETIF_MSG_LINK)); + + skb_queue_head_init(&ks->txq); + + ndev->ethtool_ops = &ks8851_ethtool_ops; + SET_NETDEV_DEV(ndev, &spi->dev); + + spi_set_drvdata(spi, ks); + + ndev->if_port = IF_PORT_100BASET; + ndev->netdev_ops = &ks8851_netdev_ops; + ndev->irq = spi->irq; + + /* issue a global soft reset to reset the device. */ + ks8851_soft_reset(ks, GRR_GSR); + + /* simple check for a valid chip being connected to the bus */ + cider = ks8851_rdreg16(ks, KS_CIDER); + if ((cider & ~CIDER_REV_MASK) != CIDER_ID) { + dev_err(&spi->dev, "failed to read device ID\n"); + ret = -ENODEV; + goto err_id; + } + + /* cache the contents of the CCR register for EEPROM, etc. */ + ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); + + if (ks->rc_ccr & CCR_EEPROM) + ks->eeprom_size = 128; + else + ks->eeprom_size = 0; + + ks8851_read_selftest(ks); + ks8851_init_mac(ks); + + ret = request_threaded_irq(spi->irq, NULL, ks8851_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + ndev->name, ks); + if (ret < 0) { + dev_err(&spi->dev, "failed to get irq\n"); + goto err_irq; + } + + ret = register_netdev(ndev); + if (ret) { + dev_err(&spi->dev, "failed to register network device\n"); + goto err_netdev; + } + + netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", + CIDER_REV_GET(cider), ndev->dev_addr, ndev->irq, + ks->rc_ccr & CCR_EEPROM ? "has" : "no"); + + return 0; + + +err_netdev: + free_irq(ndev->irq, ks); + +err_irq: + if (gpio_is_valid(gpio)) + gpio_set_value(gpio, 0); +err_id: + regulator_disable(ks->vdd_reg); +err_reg: + regulator_disable(ks->vdd_io); +err_reg_io: +err_gpio: + free_netdev(ndev); + return ret; +} + +static int ks8851_remove(struct spi_device *spi) +{ + struct ks8851_net *priv = spi_get_drvdata(spi); + + if (netif_msg_drv(priv)) + dev_info(&spi->dev, "remove\n"); + + unregister_netdev(priv->netdev); + free_irq(spi->irq, priv); + if (gpio_is_valid(priv->gpio)) + gpio_set_value(priv->gpio, 0); + regulator_disable(priv->vdd_reg); + regulator_disable(priv->vdd_io); + free_netdev(priv->netdev); + + return 0; +} + +static const struct of_device_id ks8851_match_table[] = { + { .compatible = "micrel,ks8851" }, + { } +}; + +static struct spi_driver ks8851_driver = { + .driver = { + .name = "ks8851", + .of_match_table = ks8851_match_table, + .owner = THIS_MODULE, + .pm = &ks8851_pm_ops, + }, + .probe = ks8851_probe, + .remove = ks8851_remove, +}; +module_spi_driver(ks8851_driver); + +MODULE_DESCRIPTION("KS8851 Network driver"); +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_LICENSE("GPL"); + +module_param_named(message, msg_enable, int, 0); +MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); +MODULE_ALIAS("spi:ks8851"); diff --git a/drivers/net/ethernet/micrel/ks8851.h b/drivers/net/ethernet/micrel/ks8851.h new file mode 100644 index 00000000000..852256ef1f2 --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8851.h @@ -0,0 +1,298 @@ +/* drivers/net/ethernet/micrel/ks8851.h + * + * Copyright 2009 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * KS8851 register definitions + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#define KS_CCR 0x08 +#define CCR_EEPROM (1 << 9) +#define CCR_SPI (1 << 8) +#define CCR_32PIN (1 << 0) + +/* MAC address registers */ +#define KS_MAR(_m) (0x15 - (_m)) +#define KS_MARL 0x10 +#define KS_MARM 0x12 +#define KS_MARH 0x14 + +#define KS_OBCR 0x20 +#define OBCR_ODS_16mA (1 << 6) + +#define KS_EEPCR 0x22 +#define EEPCR_EESRWA (1 << 5) +#define EEPCR_EESA (1 << 4) +#define EEPCR_EESB (1 << 3) +#define EEPCR_EEDO (1 << 2) +#define EEPCR_EESCK (1 << 1) +#define EEPCR_EECS (1 << 0) + +#define KS_MBIR 0x24 +#define MBIR_TXMBF (1 << 12) +#define MBIR_TXMBFA (1 << 11) +#define MBIR_RXMBF (1 << 4) +#define MBIR_RXMBFA (1 << 3) + +#define KS_GRR 0x26 +#define GRR_QMU (1 << 1) +#define GRR_GSR (1 << 0) + +#define KS_WFCR 0x2A +#define WFCR_MPRXE (1 << 7) +#define WFCR_WF3E (1 << 3) +#define WFCR_WF2E (1 << 2) +#define WFCR_WF1E (1 << 1) +#define WFCR_WF0E (1 << 0) + +#define KS_WF0CRC0 0x30 +#define KS_WF0CRC1 0x32 +#define KS_WF0BM0 0x34 +#define KS_WF0BM1 0x36 +#define KS_WF0BM2 0x38 +#define KS_WF0BM3 0x3A + +#define KS_WF1CRC0 0x40 +#define KS_WF1CRC1 0x42 +#define KS_WF1BM0 0x44 +#define KS_WF1BM1 0x46 +#define KS_WF1BM2 0x48 +#define KS_WF1BM3 0x4A + +#define KS_WF2CRC0 0x50 +#define KS_WF2CRC1 0x52 +#define KS_WF2BM0 0x54 +#define KS_WF2BM1 0x56 +#define KS_WF2BM2 0x58 +#define KS_WF2BM3 0x5A + +#define KS_WF3CRC0 0x60 +#define KS_WF3CRC1 0x62 +#define KS_WF3BM0 0x64 +#define KS_WF3BM1 0x66 +#define KS_WF3BM2 0x68 +#define KS_WF3BM3 0x6A + +#define KS_TXCR 0x70 +#define TXCR_TCGICMP (1 << 8) +#define TXCR_TCGUDP (1 << 7) +#define TXCR_TCGTCP (1 << 6) +#define TXCR_TCGIP (1 << 5) +#define TXCR_FTXQ (1 << 4) +#define TXCR_TXFCE (1 << 3) +#define TXCR_TXPE (1 << 2) +#define TXCR_TXCRC (1 << 1) +#define TXCR_TXE (1 << 0) + +#define KS_TXSR 0x72 +#define TXSR_TXLC (1 << 13) +#define TXSR_TXMC (1 << 12) +#define TXSR_TXFID_MASK (0x3f << 0) +#define TXSR_TXFID_SHIFT (0) +#define TXSR_TXFID_GET(_v) (((_v) >> 0) & 0x3f) + +#define KS_RXCR1 0x74 +#define RXCR1_FRXQ (1 << 15) +#define RXCR1_RXUDPFCC (1 << 14) +#define RXCR1_RXTCPFCC (1 << 13) +#define RXCR1_RXIPFCC (1 << 12) +#define RXCR1_RXPAFMA (1 << 11) +#define RXCR1_RXFCE (1 << 10) +#define RXCR1_RXEFE (1 << 9) +#define RXCR1_RXMAFMA (1 << 8) +#define RXCR1_RXBE (1 << 7) +#define RXCR1_RXME (1 << 6) +#define RXCR1_RXUE (1 << 5) +#define RXCR1_RXAE (1 << 4) +#define RXCR1_RXINVF (1 << 1) +#define RXCR1_RXE (1 << 0) + +#define KS_RXCR2 0x76 +#define RXCR2_SRDBL_MASK (0x7 << 5) +#define RXCR2_SRDBL_SHIFT (5) +#define RXCR2_SRDBL_4B (0x0 << 5) +#define RXCR2_SRDBL_8B (0x1 << 5) +#define RXCR2_SRDBL_16B (0x2 << 5) +#define RXCR2_SRDBL_32B (0x3 << 5) +#define RXCR2_SRDBL_FRAME (0x4 << 5) +#define RXCR2_IUFFP (1 << 4) +#define RXCR2_RXIUFCEZ (1 << 3) +#define RXCR2_UDPLFE (1 << 2) +#define RXCR2_RXICMPFCC (1 << 1) +#define RXCR2_RXSAF (1 << 0) + +#define KS_TXMIR 0x78 + +#define KS_RXFHSR 0x7C +#define RXFSHR_RXFV (1 << 15) +#define RXFSHR_RXICMPFCS (1 << 13) +#define RXFSHR_RXIPFCS (1 << 12) +#define RXFSHR_RXTCPFCS (1 << 11) +#define RXFSHR_RXUDPFCS (1 << 10) +#define RXFSHR_RXBF (1 << 7) +#define RXFSHR_RXMF (1 << 6) +#define RXFSHR_RXUF (1 << 5) +#define RXFSHR_RXMR (1 << 4) +#define RXFSHR_RXFT (1 << 3) +#define RXFSHR_RXFTL (1 << 2) +#define RXFSHR_RXRF (1 << 1) +#define RXFSHR_RXCE (1 << 0) + +#define KS_RXFHBCR 0x7E +#define KS_TXQCR 0x80 +#define TXQCR_AETFE (1 << 2) +#define TXQCR_TXQMAM (1 << 1) +#define TXQCR_METFE (1 << 0) + +#define KS_RXQCR 0x82 +#define RXQCR_RXDTTS (1 << 12) +#define RXQCR_RXDBCTS (1 << 11) +#define RXQCR_RXFCTS (1 << 10) +#define RXQCR_RXIPHTOE (1 << 9) +#define RXQCR_RXDTTE (1 << 7) +#define RXQCR_RXDBCTE (1 << 6) +#define RXQCR_RXFCTE (1 << 5) +#define RXQCR_ADRFE (1 << 4) +#define RXQCR_SDA (1 << 3) +#define RXQCR_RRXEF (1 << 0) + +#define KS_TXFDPR 0x84 +#define TXFDPR_TXFPAI (1 << 14) +#define TXFDPR_TXFP_MASK (0x7ff << 0) +#define TXFDPR_TXFP_SHIFT (0) + +#define KS_RXFDPR 0x86 +#define RXFDPR_RXFPAI (1 << 14) + +#define KS_RXDTTR 0x8C +#define KS_RXDBCTR 0x8E + +#define KS_IER 0x90 +#define KS_ISR 0x92 +#define IRQ_LCI (1 << 15) +#define IRQ_TXI (1 << 14) +#define IRQ_RXI (1 << 13) +#define IRQ_RXOI (1 << 11) +#define IRQ_TXPSI (1 << 9) +#define IRQ_RXPSI (1 << 8) +#define IRQ_TXSAI (1 << 6) +#define IRQ_RXWFDI (1 << 5) +#define IRQ_RXMPDI (1 << 4) +#define IRQ_LDI (1 << 3) +#define IRQ_EDI (1 << 2) +#define IRQ_SPIBEI (1 << 1) +#define IRQ_DEDI (1 << 0) + +#define KS_RXFCTR 0x9C +#define KS_RXFC 0x9D +#define RXFCTR_RXFC_MASK (0xff << 8) +#define RXFCTR_RXFC_SHIFT (8) +#define RXFCTR_RXFC_GET(_v) (((_v) >> 8) & 0xff) +#define RXFCTR_RXFCT_MASK (0xff << 0) +#define RXFCTR_RXFCT_SHIFT (0) + +#define KS_TXNTFSR 0x9E + +#define KS_MAHTR0 0xA0 +#define KS_MAHTR1 0xA2 +#define KS_MAHTR2 0xA4 +#define KS_MAHTR3 0xA6 + +#define KS_FCLWR 0xB0 +#define KS_FCHWR 0xB2 +#define KS_FCOWR 0xB4 + +#define KS_CIDER 0xC0 +#define CIDER_ID 0x8870 +#define CIDER_REV_MASK (0x7 << 1) +#define CIDER_REV_SHIFT (1) +#define CIDER_REV_GET(_v) (((_v) >> 1) & 0x7) + +#define KS_CGCR 0xC6 + +#define KS_IACR 0xC8 +#define IACR_RDEN (1 << 12) +#define IACR_TSEL_MASK (0x3 << 10) +#define IACR_TSEL_SHIFT (10) +#define IACR_TSEL_MIB (0x3 << 10) +#define IACR_ADDR_MASK (0x1f << 0) +#define IACR_ADDR_SHIFT (0) + +#define KS_IADLR 0xD0 +#define KS_IAHDR 0xD2 + +#define KS_PMECR 0xD4 +#define PMECR_PME_DELAY (1 << 14) +#define PMECR_PME_POL (1 << 12) +#define PMECR_WOL_WAKEUP (1 << 11) +#define PMECR_WOL_MAGICPKT (1 << 10) +#define PMECR_WOL_LINKUP (1 << 9) +#define PMECR_WOL_ENERGY (1 << 8) +#define PMECR_AUTO_WAKE_EN (1 << 7) +#define PMECR_WAKEUP_NORMAL (1 << 6) +#define PMECR_WKEVT_MASK (0xf << 2) +#define PMECR_WKEVT_SHIFT (2) +#define PMECR_WKEVT_GET(_v) (((_v) >> 2) & 0xf) +#define PMECR_WKEVT_ENERGY (0x1 << 2) +#define PMECR_WKEVT_LINK (0x2 << 2) +#define PMECR_WKEVT_MAGICPKT (0x4 << 2) +#define PMECR_WKEVT_FRAME (0x8 << 2) +#define PMECR_PM_MASK (0x3 << 0) +#define PMECR_PM_SHIFT (0) +#define PMECR_PM_NORMAL (0x0 << 0) +#define PMECR_PM_ENERGY (0x1 << 0) +#define PMECR_PM_SOFTDOWN (0x2 << 0) +#define PMECR_PM_POWERSAVE (0x3 << 0) + +/* Standard MII PHY data */ +#define KS_P1MBCR 0xE4 +#define KS_P1MBSR 0xE6 +#define KS_PHY1ILR 0xE8 +#define KS_PHY1IHR 0xEA +#define KS_P1ANAR 0xEC +#define KS_P1ANLPR 0xEE + +#define KS_P1SCLMD 0xF4 +#define P1SCLMD_LEDOFF (1 << 15) +#define P1SCLMD_TXIDS (1 << 14) +#define P1SCLMD_RESTARTAN (1 << 13) +#define P1SCLMD_DISAUTOMDIX (1 << 10) +#define P1SCLMD_FORCEMDIX (1 << 9) +#define P1SCLMD_AUTONEGEN (1 << 7) +#define P1SCLMD_FORCE100 (1 << 6) +#define P1SCLMD_FORCEFDX (1 << 5) +#define P1SCLMD_ADV_FLOW (1 << 4) +#define P1SCLMD_ADV_100BT_FDX (1 << 3) +#define P1SCLMD_ADV_100BT_HDX (1 << 2) +#define P1SCLMD_ADV_10BT_FDX (1 << 1) +#define P1SCLMD_ADV_10BT_HDX (1 << 0) + +#define KS_P1CR 0xF6 +#define P1CR_HP_MDIX (1 << 15) +#define P1CR_REV_POL (1 << 13) +#define P1CR_OP_100M (1 << 10) +#define P1CR_OP_FDX (1 << 9) +#define P1CR_OP_MDI (1 << 7) +#define P1CR_AN_DONE (1 << 6) +#define P1CR_LINK_GOOD (1 << 5) +#define P1CR_PNTR_FLOW (1 << 4) +#define P1CR_PNTR_100BT_FDX (1 << 3) +#define P1CR_PNTR_100BT_HDX (1 << 2) +#define P1CR_PNTR_10BT_FDX (1 << 1) +#define P1CR_PNTR_10BT_HDX (1 << 0) + +/* TX Frame control */ + +#define TXFR_TXIC (1 << 15) +#define TXFR_TXFID_MASK (0x3f << 0) +#define TXFR_TXFID_SHIFT (0) + +/* SPI frame opcodes */ +#define KS_SPIOP_RD (0x00) +#define KS_SPIOP_WR (0x40) +#define KS_SPIOP_RXFIFO (0x80) +#define KS_SPIOP_TXFIFO (0xC0) diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c new file mode 100644 index 00000000000..c83d16dc7cd --- /dev/null +++ b/drivers/net/ethernet/micrel/ks8851_mll.c @@ -0,0 +1,1713 @@ +/** + * drivers/net/ethernet/micrel/ks8851_mll.c + * Copyright (c) 2009 Micrel Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* Supports: + * KS8851 16bit MLL chip from Micrel Inc. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/cache.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/ks8851_mll.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_net.h> + +#define DRV_NAME "ks8851_mll" + +static u8 KS_DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x86, 0x95, 0x11 }; +#define MAX_RECV_FRAMES 255 +#define MAX_BUF_SIZE 2048 +#define TX_BUF_SIZE 2000 +#define RX_BUF_SIZE 2000 + +#define KS_CCR 0x08 +#define CCR_EEPROM (1 << 9) +#define CCR_SPI (1 << 8) +#define CCR_8BIT (1 << 7) +#define CCR_16BIT (1 << 6) +#define CCR_32BIT (1 << 5) +#define CCR_SHARED (1 << 4) +#define CCR_32PIN (1 << 0) + +/* MAC address registers */ +#define KS_MARL 0x10 +#define KS_MARM 0x12 +#define KS_MARH 0x14 + +#define KS_OBCR 0x20 +#define OBCR_ODS_16MA (1 << 6) + +#define KS_EEPCR 0x22 +#define EEPCR_EESA (1 << 4) +#define EEPCR_EESB (1 << 3) +#define EEPCR_EEDO (1 << 2) +#define EEPCR_EESCK (1 << 1) +#define EEPCR_EECS (1 << 0) + +#define KS_MBIR 0x24 +#define MBIR_TXMBF (1 << 12) +#define MBIR_TXMBFA (1 << 11) +#define MBIR_RXMBF (1 << 4) +#define MBIR_RXMBFA (1 << 3) + +#define KS_GRR 0x26 +#define GRR_QMU (1 << 1) +#define GRR_GSR (1 << 0) + +#define KS_WFCR 0x2A +#define WFCR_MPRXE (1 << 7) +#define WFCR_WF3E (1 << 3) +#define WFCR_WF2E (1 << 2) +#define WFCR_WF1E (1 << 1) +#define WFCR_WF0E (1 << 0) + +#define KS_WF0CRC0 0x30 +#define KS_WF0CRC1 0x32 +#define KS_WF0BM0 0x34 +#define KS_WF0BM1 0x36 +#define KS_WF0BM2 0x38 +#define KS_WF0BM3 0x3A + +#define KS_WF1CRC0 0x40 +#define KS_WF1CRC1 0x42 +#define KS_WF1BM0 0x44 +#define KS_WF1BM1 0x46 +#define KS_WF1BM2 0x48 +#define KS_WF1BM3 0x4A + +#define KS_WF2CRC0 0x50 +#define KS_WF2CRC1 0x52 +#define KS_WF2BM0 0x54 +#define KS_WF2BM1 0x56 +#define KS_WF2BM2 0x58 +#define KS_WF2BM3 0x5A + +#define KS_WF3CRC0 0x60 +#define KS_WF3CRC1 0x62 +#define KS_WF3BM0 0x64 +#define KS_WF3BM1 0x66 +#define KS_WF3BM2 0x68 +#define KS_WF3BM3 0x6A + +#define KS_TXCR 0x70 +#define TXCR_TCGICMP (1 << 8) +#define TXCR_TCGUDP (1 << 7) +#define TXCR_TCGTCP (1 << 6) +#define TXCR_TCGIP (1 << 5) +#define TXCR_FTXQ (1 << 4) +#define TXCR_TXFCE (1 << 3) +#define TXCR_TXPE (1 << 2) +#define TXCR_TXCRC (1 << 1) +#define TXCR_TXE (1 << 0) + +#define KS_TXSR 0x72 +#define TXSR_TXLC (1 << 13) +#define TXSR_TXMC (1 << 12) +#define TXSR_TXFID_MASK (0x3f << 0) +#define TXSR_TXFID_SHIFT (0) +#define TXSR_TXFID_GET(_v) (((_v) >> 0) & 0x3f) + + +#define KS_RXCR1 0x74 +#define RXCR1_FRXQ (1 << 15) +#define RXCR1_RXUDPFCC (1 << 14) +#define RXCR1_RXTCPFCC (1 << 13) +#define RXCR1_RXIPFCC (1 << 12) +#define RXCR1_RXPAFMA (1 << 11) +#define RXCR1_RXFCE (1 << 10) +#define RXCR1_RXEFE (1 << 9) +#define RXCR1_RXMAFMA (1 << 8) +#define RXCR1_RXBE (1 << 7) +#define RXCR1_RXME (1 << 6) +#define RXCR1_RXUE (1 << 5) +#define RXCR1_RXAE (1 << 4) +#define RXCR1_RXINVF (1 << 1) +#define RXCR1_RXE (1 << 0) +#define RXCR1_FILTER_MASK (RXCR1_RXINVF | RXCR1_RXAE | \ + RXCR1_RXMAFMA | RXCR1_RXPAFMA) + +#define KS_RXCR2 0x76 +#define RXCR2_SRDBL_MASK (0x7 << 5) +#define RXCR2_SRDBL_SHIFT (5) +#define RXCR2_SRDBL_4B (0x0 << 5) +#define RXCR2_SRDBL_8B (0x1 << 5) +#define RXCR2_SRDBL_16B (0x2 << 5) +#define RXCR2_SRDBL_32B (0x3 << 5) +/* #define RXCR2_SRDBL_FRAME (0x4 << 5) */ +#define RXCR2_IUFFP (1 << 4) +#define RXCR2_RXIUFCEZ (1 << 3) +#define RXCR2_UDPLFE (1 << 2) +#define RXCR2_RXICMPFCC (1 << 1) +#define RXCR2_RXSAF (1 << 0) + +#define KS_TXMIR 0x78 + +#define KS_RXFHSR 0x7C +#define RXFSHR_RXFV (1 << 15) +#define RXFSHR_RXICMPFCS (1 << 13) +#define RXFSHR_RXIPFCS (1 << 12) +#define RXFSHR_RXTCPFCS (1 << 11) +#define RXFSHR_RXUDPFCS (1 << 10) +#define RXFSHR_RXBF (1 << 7) +#define RXFSHR_RXMF (1 << 6) +#define RXFSHR_RXUF (1 << 5) +#define RXFSHR_RXMR (1 << 4) +#define RXFSHR_RXFT (1 << 3) +#define RXFSHR_RXFTL (1 << 2) +#define RXFSHR_RXRF (1 << 1) +#define RXFSHR_RXCE (1 << 0) +#define RXFSHR_ERR (RXFSHR_RXCE | RXFSHR_RXRF |\ + RXFSHR_RXFTL | RXFSHR_RXMR |\ + RXFSHR_RXICMPFCS | RXFSHR_RXIPFCS |\ + RXFSHR_RXTCPFCS) +#define KS_RXFHBCR 0x7E +#define RXFHBCR_CNT_MASK 0x0FFF + +#define KS_TXQCR 0x80 +#define TXQCR_AETFE (1 << 2) +#define TXQCR_TXQMAM (1 << 1) +#define TXQCR_METFE (1 << 0) + +#define KS_RXQCR 0x82 +#define RXQCR_RXDTTS (1 << 12) +#define RXQCR_RXDBCTS (1 << 11) +#define RXQCR_RXFCTS (1 << 10) +#define RXQCR_RXIPHTOE (1 << 9) +#define RXQCR_RXDTTE (1 << 7) +#define RXQCR_RXDBCTE (1 << 6) +#define RXQCR_RXFCTE (1 << 5) +#define RXQCR_ADRFE (1 << 4) +#define RXQCR_SDA (1 << 3) +#define RXQCR_RRXEF (1 << 0) +#define RXQCR_CMD_CNTL (RXQCR_RXFCTE|RXQCR_ADRFE) + +#define KS_TXFDPR 0x84 +#define TXFDPR_TXFPAI (1 << 14) +#define TXFDPR_TXFP_MASK (0x7ff << 0) +#define TXFDPR_TXFP_SHIFT (0) + +#define KS_RXFDPR 0x86 +#define RXFDPR_RXFPAI (1 << 14) + +#define KS_RXDTTR 0x8C +#define KS_RXDBCTR 0x8E + +#define KS_IER 0x90 +#define KS_ISR 0x92 +#define IRQ_LCI (1 << 15) +#define IRQ_TXI (1 << 14) +#define IRQ_RXI (1 << 13) +#define IRQ_RXOI (1 << 11) +#define IRQ_TXPSI (1 << 9) +#define IRQ_RXPSI (1 << 8) +#define IRQ_TXSAI (1 << 6) +#define IRQ_RXWFDI (1 << 5) +#define IRQ_RXMPDI (1 << 4) +#define IRQ_LDI (1 << 3) +#define IRQ_EDI (1 << 2) +#define IRQ_SPIBEI (1 << 1) +#define IRQ_DEDI (1 << 0) + +#define KS_RXFCTR 0x9C +#define RXFCTR_THRESHOLD_MASK 0x00FF + +#define KS_RXFC 0x9D +#define RXFCTR_RXFC_MASK (0xff << 8) +#define RXFCTR_RXFC_SHIFT (8) +#define RXFCTR_RXFC_GET(_v) (((_v) >> 8) & 0xff) +#define RXFCTR_RXFCT_MASK (0xff << 0) +#define RXFCTR_RXFCT_SHIFT (0) + +#define KS_TXNTFSR 0x9E + +#define KS_MAHTR0 0xA0 +#define KS_MAHTR1 0xA2 +#define KS_MAHTR2 0xA4 +#define KS_MAHTR3 0xA6 + +#define KS_FCLWR 0xB0 +#define KS_FCHWR 0xB2 +#define KS_FCOWR 0xB4 + +#define KS_CIDER 0xC0 +#define CIDER_ID 0x8870 +#define CIDER_REV_MASK (0x7 << 1) +#define CIDER_REV_SHIFT (1) +#define CIDER_REV_GET(_v) (((_v) >> 1) & 0x7) + +#define KS_CGCR 0xC6 +#define KS_IACR 0xC8 +#define IACR_RDEN (1 << 12) +#define IACR_TSEL_MASK (0x3 << 10) +#define IACR_TSEL_SHIFT (10) +#define IACR_TSEL_MIB (0x3 << 10) +#define IACR_ADDR_MASK (0x1f << 0) +#define IACR_ADDR_SHIFT (0) + +#define KS_IADLR 0xD0 +#define KS_IAHDR 0xD2 + +#define KS_PMECR 0xD4 +#define PMECR_PME_DELAY (1 << 14) +#define PMECR_PME_POL (1 << 12) +#define PMECR_WOL_WAKEUP (1 << 11) +#define PMECR_WOL_MAGICPKT (1 << 10) +#define PMECR_WOL_LINKUP (1 << 9) +#define PMECR_WOL_ENERGY (1 << 8) +#define PMECR_AUTO_WAKE_EN (1 << 7) +#define PMECR_WAKEUP_NORMAL (1 << 6) +#define PMECR_WKEVT_MASK (0xf << 2) +#define PMECR_WKEVT_SHIFT (2) +#define PMECR_WKEVT_GET(_v) (((_v) >> 2) & 0xf) +#define PMECR_WKEVT_ENERGY (0x1 << 2) +#define PMECR_WKEVT_LINK (0x2 << 2) +#define PMECR_WKEVT_MAGICPKT (0x4 << 2) +#define PMECR_WKEVT_FRAME (0x8 << 2) +#define PMECR_PM_MASK (0x3 << 0) +#define PMECR_PM_SHIFT (0) +#define PMECR_PM_NORMAL (0x0 << 0) +#define PMECR_PM_ENERGY (0x1 << 0) +#define PMECR_PM_SOFTDOWN (0x2 << 0) +#define PMECR_PM_POWERSAVE (0x3 << 0) + +/* Standard MII PHY data */ +#define KS_P1MBCR 0xE4 +#define P1MBCR_FORCE_FDX (1 << 8) + +#define KS_P1MBSR 0xE6 +#define P1MBSR_AN_COMPLETE (1 << 5) +#define P1MBSR_AN_CAPABLE (1 << 3) +#define P1MBSR_LINK_UP (1 << 2) + +#define KS_PHY1ILR 0xE8 +#define KS_PHY1IHR 0xEA +#define KS_P1ANAR 0xEC +#define KS_P1ANLPR 0xEE + +#define KS_P1SCLMD 0xF4 +#define P1SCLMD_LEDOFF (1 << 15) +#define P1SCLMD_TXIDS (1 << 14) +#define P1SCLMD_RESTARTAN (1 << 13) +#define P1SCLMD_DISAUTOMDIX (1 << 10) +#define P1SCLMD_FORCEMDIX (1 << 9) +#define P1SCLMD_AUTONEGEN (1 << 7) +#define P1SCLMD_FORCE100 (1 << 6) +#define P1SCLMD_FORCEFDX (1 << 5) +#define P1SCLMD_ADV_FLOW (1 << 4) +#define P1SCLMD_ADV_100BT_FDX (1 << 3) +#define P1SCLMD_ADV_100BT_HDX (1 << 2) +#define P1SCLMD_ADV_10BT_FDX (1 << 1) +#define P1SCLMD_ADV_10BT_HDX (1 << 0) + +#define KS_P1CR 0xF6 +#define P1CR_HP_MDIX (1 << 15) +#define P1CR_REV_POL (1 << 13) +#define P1CR_OP_100M (1 << 10) +#define P1CR_OP_FDX (1 << 9) +#define P1CR_OP_MDI (1 << 7) +#define P1CR_AN_DONE (1 << 6) +#define P1CR_LINK_GOOD (1 << 5) +#define P1CR_PNTR_FLOW (1 << 4) +#define P1CR_PNTR_100BT_FDX (1 << 3) +#define P1CR_PNTR_100BT_HDX (1 << 2) +#define P1CR_PNTR_10BT_FDX (1 << 1) +#define P1CR_PNTR_10BT_HDX (1 << 0) + +/* TX Frame control */ + +#define TXFR_TXIC (1 << 15) +#define TXFR_TXFID_MASK (0x3f << 0) +#define TXFR_TXFID_SHIFT (0) + +#define KS_P1SR 0xF8 +#define P1SR_HP_MDIX (1 << 15) +#define P1SR_REV_POL (1 << 13) +#define P1SR_OP_100M (1 << 10) +#define P1SR_OP_FDX (1 << 9) +#define P1SR_OP_MDI (1 << 7) +#define P1SR_AN_DONE (1 << 6) +#define P1SR_LINK_GOOD (1 << 5) +#define P1SR_PNTR_FLOW (1 << 4) +#define P1SR_PNTR_100BT_FDX (1 << 3) +#define P1SR_PNTR_100BT_HDX (1 << 2) +#define P1SR_PNTR_10BT_FDX (1 << 1) +#define P1SR_PNTR_10BT_HDX (1 << 0) + +#define ENUM_BUS_NONE 0 +#define ENUM_BUS_8BIT 1 +#define ENUM_BUS_16BIT 2 +#define ENUM_BUS_32BIT 3 + +#define MAX_MCAST_LST 32 +#define HW_MCAST_SIZE 8 + +/** + * union ks_tx_hdr - tx header data + * @txb: The header as bytes + * @txw: The header as 16bit, little-endian words + * + * A dual representation of the tx header data to allow + * access to individual bytes, and to allow 16bit accesses + * with 16bit alignment. + */ +union ks_tx_hdr { + u8 txb[4]; + __le16 txw[2]; +}; + +/** + * struct ks_net - KS8851 driver private data + * @net_device : The network device we're bound to + * @hw_addr : start address of data register. + * @hw_addr_cmd : start address of command register. + * @txh : temporaly buffer to save status/length. + * @lock : Lock to ensure that the device is not accessed when busy. + * @pdev : Pointer to platform device. + * @mii : The MII state information for the mii calls. + * @frame_head_info : frame header information for multi-pkt rx. + * @statelock : Lock on this structure for tx list. + * @msg_enable : The message flags controlling driver output (see ethtool). + * @frame_cnt : number of frames received. + * @bus_width : i/o bus width. + * @rc_rxqcr : Cached copy of KS_RXQCR. + * @rc_txcr : Cached copy of KS_TXCR. + * @rc_ier : Cached copy of KS_IER. + * @sharedbus : Multipex(addr and data bus) mode indicator. + * @cmd_reg_cache : command register cached. + * @cmd_reg_cache_int : command register cached. Used in the irq handler. + * @promiscuous : promiscuous mode indicator. + * @all_mcast : mutlicast indicator. + * @mcast_lst_size : size of multicast list. + * @mcast_lst : multicast list. + * @mcast_bits : multicast enabed. + * @mac_addr : MAC address assigned to this device. + * @fid : frame id. + * @extra_byte : number of extra byte prepended rx pkt. + * @enabled : indicator this device works. + * + * The @lock ensures that the chip is protected when certain operations are + * in progress. When the read or write packet transfer is in progress, most + * of the chip registers are not accessible until the transfer is finished and + * the DMA has been de-asserted. + * + * The @statelock is used to protect information in the structure which may + * need to be accessed via several sources, such as the network driver layer + * or one of the work queues. + * + */ + +/* Receive multiplex framer header info */ +struct type_frame_head { + u16 sts; /* Frame status */ + u16 len; /* Byte count */ +}; + +struct ks_net { + struct net_device *netdev; + void __iomem *hw_addr; + void __iomem *hw_addr_cmd; + union ks_tx_hdr txh ____cacheline_aligned; + struct mutex lock; /* spinlock to be interrupt safe */ + struct platform_device *pdev; + struct mii_if_info mii; + struct type_frame_head *frame_head_info; + spinlock_t statelock; + u32 msg_enable; + u32 frame_cnt; + int bus_width; + + u16 rc_rxqcr; + u16 rc_txcr; + u16 rc_ier; + u16 sharedbus; + u16 cmd_reg_cache; + u16 cmd_reg_cache_int; + u16 promiscuous; + u16 all_mcast; + u16 mcast_lst_size; + u8 mcast_lst[MAX_MCAST_LST][ETH_ALEN]; + u8 mcast_bits[HW_MCAST_SIZE]; + u8 mac_addr[6]; + u8 fid; + u8 extra_byte; + u8 enabled; +}; + +static int msg_enable; + +#define BE3 0x8000 /* Byte Enable 3 */ +#define BE2 0x4000 /* Byte Enable 2 */ +#define BE1 0x2000 /* Byte Enable 1 */ +#define BE0 0x1000 /* Byte Enable 0 */ + +/* register read/write calls. + * + * All these calls issue transactions to access the chip's registers. They + * all require that the necessary lock is held to prevent accesses when the + * chip is busy transferring packet data (RX/TX FIFO accesses). + */ + +/** + * ks_rdreg8 - read 8 bit register from device + * @ks : The chip information + * @offset: The register address + * + * Read a 8bit register from the chip, returning the result + */ +static u8 ks_rdreg8(struct ks_net *ks, int offset) +{ + u16 data; + u8 shift_bit = offset & 0x03; + u8 shift_data = (offset & 1) << 3; + ks->cmd_reg_cache = (u16) offset | (u16)(BE0 << shift_bit); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + data = ioread16(ks->hw_addr); + return (u8)(data >> shift_data); +} + +/** + * ks_rdreg16 - read 16 bit register from device + * @ks : The chip information + * @offset: The register address + * + * Read a 16bit register from the chip, returning the result + */ + +static u16 ks_rdreg16(struct ks_net *ks, int offset) +{ + ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + return ioread16(ks->hw_addr); +} + +/** + * ks_wrreg8 - write 8bit register value to chip + * @ks: The chip information + * @offset: The register address + * @value: The value to write + * + */ +static void ks_wrreg8(struct ks_net *ks, int offset, u8 value) +{ + u8 shift_bit = (offset & 0x03); + u16 value_write = (u16)(value << ((offset & 1) << 3)); + ks->cmd_reg_cache = (u16)offset | (BE0 << shift_bit); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + iowrite16(value_write, ks->hw_addr); +} + +/** + * ks_wrreg16 - write 16bit register value to chip + * @ks: The chip information + * @offset: The register address + * @value: The value to write + * + */ + +static void ks_wrreg16(struct ks_net *ks, int offset, u16 value) +{ + ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + iowrite16(value, ks->hw_addr); +} + +/** + * ks_inblk - read a block of data from QMU. This is called after sudo DMA mode enabled. + * @ks: The chip state + * @wptr: buffer address to save data + * @len: length in byte to read + * + */ +static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len) +{ + len >>= 1; + while (len--) + *wptr++ = (u16)ioread16(ks->hw_addr); +} + +/** + * ks_outblk - write data to QMU. This is called after sudo DMA mode enabled. + * @ks: The chip information + * @wptr: buffer address + * @len: length in byte to write + * + */ +static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len) +{ + len >>= 1; + while (len--) + iowrite16(*wptr++, ks->hw_addr); +} + +static void ks_disable_int(struct ks_net *ks) +{ + ks_wrreg16(ks, KS_IER, 0x0000); +} /* ks_disable_int */ + +static void ks_enable_int(struct ks_net *ks) +{ + ks_wrreg16(ks, KS_IER, ks->rc_ier); +} /* ks_enable_int */ + +/** + * ks_tx_fifo_space - return the available hardware buffer size. + * @ks: The chip information + * + */ +static inline u16 ks_tx_fifo_space(struct ks_net *ks) +{ + return ks_rdreg16(ks, KS_TXMIR) & 0x1fff; +} + +/** + * ks_save_cmd_reg - save the command register from the cache. + * @ks: The chip information + * + */ +static inline void ks_save_cmd_reg(struct ks_net *ks) +{ + /*ks8851 MLL has a bug to read back the command register. + * So rely on software to save the content of command register. + */ + ks->cmd_reg_cache_int = ks->cmd_reg_cache; +} + +/** + * ks_restore_cmd_reg - restore the command register from the cache and + * write to hardware register. + * @ks: The chip information + * + */ +static inline void ks_restore_cmd_reg(struct ks_net *ks) +{ + ks->cmd_reg_cache = ks->cmd_reg_cache_int; + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); +} + +/** + * ks_set_powermode - set power mode of the device + * @ks: The chip information + * @pwrmode: The power mode value to write to KS_PMECR. + * + * Change the power mode of the chip. + */ +static void ks_set_powermode(struct ks_net *ks, unsigned pwrmode) +{ + unsigned pmecr; + + netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); + + ks_rdreg16(ks, KS_GRR); + pmecr = ks_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_PM_MASK; + pmecr |= pwrmode; + + ks_wrreg16(ks, KS_PMECR, pmecr); +} + +/** + * ks_read_config - read chip configuration of bus width. + * @ks: The chip information + * + */ +static void ks_read_config(struct ks_net *ks) +{ + u16 reg_data = 0; + + /* Regardless of bus width, 8 bit read should always work.*/ + reg_data = ks_rdreg8(ks, KS_CCR) & 0x00FF; + reg_data |= ks_rdreg8(ks, KS_CCR+1) << 8; + + /* addr/data bus are multiplexed */ + ks->sharedbus = (reg_data & CCR_SHARED) == CCR_SHARED; + + /* There are garbage data when reading data from QMU, + depending on bus-width. + */ + + if (reg_data & CCR_8BIT) { + ks->bus_width = ENUM_BUS_8BIT; + ks->extra_byte = 1; + } else if (reg_data & CCR_16BIT) { + ks->bus_width = ENUM_BUS_16BIT; + ks->extra_byte = 2; + } else { + ks->bus_width = ENUM_BUS_32BIT; + ks->extra_byte = 4; + } +} + +/** + * ks_soft_reset - issue one of the soft reset to the device + * @ks: The device state. + * @op: The bit(s) to set in the GRR + * + * Issue the relevant soft-reset command to the device's GRR register + * specified by @op. + * + * Note, the delays are in there as a caution to ensure that the reset + * has time to take effect and then complete. Since the datasheet does + * not currently specify the exact sequence, we have chosen something + * that seems to work with our device. + */ +static void ks_soft_reset(struct ks_net *ks, unsigned op) +{ + /* Disable interrupt first */ + ks_wrreg16(ks, KS_IER, 0x0000); + ks_wrreg16(ks, KS_GRR, op); + mdelay(10); /* wait a short time to effect reset */ + ks_wrreg16(ks, KS_GRR, 0); + mdelay(1); /* wait for condition to clear */ +} + + +static void ks_enable_qmu(struct ks_net *ks) +{ + u16 w; + + w = ks_rdreg16(ks, KS_TXCR); + /* Enables QMU Transmit (TXCR). */ + ks_wrreg16(ks, KS_TXCR, w | TXCR_TXE); + + /* + * RX Frame Count Threshold Enable and Auto-Dequeue RXQ Frame + * Enable + */ + + w = ks_rdreg16(ks, KS_RXQCR); + ks_wrreg16(ks, KS_RXQCR, w | RXQCR_RXFCTE); + + /* Enables QMU Receive (RXCR1). */ + w = ks_rdreg16(ks, KS_RXCR1); + ks_wrreg16(ks, KS_RXCR1, w | RXCR1_RXE); + ks->enabled = true; +} /* ks_enable_qmu */ + +static void ks_disable_qmu(struct ks_net *ks) +{ + u16 w; + + w = ks_rdreg16(ks, KS_TXCR); + + /* Disables QMU Transmit (TXCR). */ + w &= ~TXCR_TXE; + ks_wrreg16(ks, KS_TXCR, w); + + /* Disables QMU Receive (RXCR1). */ + w = ks_rdreg16(ks, KS_RXCR1); + w &= ~RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, w); + + ks->enabled = false; + +} /* ks_disable_qmu */ + +/** + * ks_read_qmu - read 1 pkt data from the QMU. + * @ks: The chip information + * @buf: buffer address to save 1 pkt + * @len: Pkt length + * Here is the sequence to read 1 pkt: + * 1. set sudo DMA mode + * 2. read prepend data + * 3. read pkt data + * 4. reset sudo DMA Mode + */ +static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len) +{ + u32 r = ks->extra_byte & 0x1 ; + u32 w = ks->extra_byte - r; + + /* 1. set sudo DMA mode */ + ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI); + ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff); + + /* 2. read prepend data */ + /** + * read 4 + extra bytes and discard them. + * extra bytes for dummy, 2 for status, 2 for len + */ + + /* use likely(r) for 8 bit access for performance */ + if (unlikely(r)) + ioread8(ks->hw_addr); + ks_inblk(ks, buf, w + 2 + 2); + + /* 3. read pkt data */ + ks_inblk(ks, buf, ALIGN(len, 4)); + + /* 4. reset sudo DMA Mode */ + ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr); +} + +/** + * ks_rcv - read multiple pkts data from the QMU. + * @ks: The chip information + * @netdev: The network device being opened. + * + * Read all of header information before reading pkt content. + * It is not allowed only port of pkts in QMU after issuing + * interrupt ack. + */ +static void ks_rcv(struct ks_net *ks, struct net_device *netdev) +{ + u32 i; + struct type_frame_head *frame_hdr = ks->frame_head_info; + struct sk_buff *skb; + + ks->frame_cnt = ks_rdreg16(ks, KS_RXFCTR) >> 8; + + /* read all header information */ + for (i = 0; i < ks->frame_cnt; i++) { + /* Checking Received packet status */ + frame_hdr->sts = ks_rdreg16(ks, KS_RXFHSR); + /* Get packet len from hardware */ + frame_hdr->len = ks_rdreg16(ks, KS_RXFHBCR); + frame_hdr++; + } + + frame_hdr = ks->frame_head_info; + while (ks->frame_cnt--) { + if (unlikely(!(frame_hdr->sts & RXFSHR_RXFV) || + frame_hdr->len >= RX_BUF_SIZE || + frame_hdr->len <= 0)) { + + /* discard an invalid packet */ + ks_wrreg16(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_RRXEF)); + netdev->stats.rx_dropped++; + if (!(frame_hdr->sts & RXFSHR_RXFV)) + netdev->stats.rx_frame_errors++; + else + netdev->stats.rx_length_errors++; + frame_hdr++; + continue; + } + + skb = netdev_alloc_skb(netdev, frame_hdr->len + 16); + if (likely(skb)) { + skb_reserve(skb, 2); + /* read data block including CRC 4 bytes */ + ks_read_qmu(ks, (u16 *)skb->data, frame_hdr->len); + skb_put(skb, frame_hdr->len - 4); + skb->protocol = eth_type_trans(skb, netdev); + netif_rx(skb); + /* exclude CRC size */ + netdev->stats.rx_bytes += frame_hdr->len - 4; + netdev->stats.rx_packets++; + } else { + ks_wrreg16(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_RRXEF)); + netdev->stats.rx_dropped++; + } + frame_hdr++; + } +} + +/** + * ks_update_link_status - link status update. + * @netdev: The network device being opened. + * @ks: The chip information + * + */ + +static void ks_update_link_status(struct net_device *netdev, struct ks_net *ks) +{ + /* check the status of the link */ + u32 link_up_status; + if (ks_rdreg16(ks, KS_P1SR) & P1SR_LINK_GOOD) { + netif_carrier_on(netdev); + link_up_status = true; + } else { + netif_carrier_off(netdev); + link_up_status = false; + } + netif_dbg(ks, link, ks->netdev, + "%s: %s\n", __func__, link_up_status ? "UP" : "DOWN"); +} + +/** + * ks_irq - device interrupt handler + * @irq: Interrupt number passed from the IRQ handler. + * @pw: The private word passed to register_irq(), our struct ks_net. + * + * This is the handler invoked to find out what happened + * + * Read the interrupt status, work out what needs to be done and then clear + * any of the interrupts that are not needed. + */ + +static irqreturn_t ks_irq(int irq, void *pw) +{ + struct net_device *netdev = pw; + struct ks_net *ks = netdev_priv(netdev); + u16 status; + + /*this should be the first in IRQ handler */ + ks_save_cmd_reg(ks); + + status = ks_rdreg16(ks, KS_ISR); + if (unlikely(!status)) { + ks_restore_cmd_reg(ks); + return IRQ_NONE; + } + + ks_wrreg16(ks, KS_ISR, status); + + if (likely(status & IRQ_RXI)) + ks_rcv(ks, netdev); + + if (unlikely(status & IRQ_LCI)) + ks_update_link_status(netdev, ks); + + if (unlikely(status & IRQ_TXI)) + netif_wake_queue(netdev); + + if (unlikely(status & IRQ_LDI)) { + + u16 pmecr = ks_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_WKEVT_MASK; + ks_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); + } + + if (unlikely(status & IRQ_RXOI)) + ks->netdev->stats.rx_over_errors++; + /* this should be the last in IRQ handler*/ + ks_restore_cmd_reg(ks); + return IRQ_HANDLED; +} + + +/** + * ks_net_open - open network device + * @netdev: The network device being opened. + * + * Called when the network device is marked active, such as a user executing + * 'ifconfig up' on the device. + */ +static int ks_net_open(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + int err; + +#define KS_INT_FLAGS IRQF_TRIGGER_LOW + /* lock the card, even if we may not actually do anything + * else at the moment. + */ + + netif_dbg(ks, ifup, ks->netdev, "%s - entry\n", __func__); + + /* reset the HW */ + err = request_irq(netdev->irq, ks_irq, KS_INT_FLAGS, DRV_NAME, netdev); + + if (err) { + pr_err("Failed to request IRQ: %d: %d\n", netdev->irq, err); + return err; + } + + /* wake up powermode to normal mode */ + ks_set_powermode(ks, PMECR_PM_NORMAL); + mdelay(1); /* wait for normal mode to take effect */ + + ks_wrreg16(ks, KS_ISR, 0xffff); + ks_enable_int(ks); + ks_enable_qmu(ks); + netif_start_queue(ks->netdev); + + netif_dbg(ks, ifup, ks->netdev, "network device up\n"); + + return 0; +} + +/** + * ks_net_stop - close network device + * @netdev: The device being closed. + * + * Called to close down a network device which has been active. Cancell any + * work, shutdown the RX and TX process and then place the chip into a low + * power state whilst it is not being used. + */ +static int ks_net_stop(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + + netif_info(ks, ifdown, netdev, "shutting down\n"); + + netif_stop_queue(netdev); + + mutex_lock(&ks->lock); + + /* turn off the IRQs and ack any outstanding */ + ks_wrreg16(ks, KS_IER, 0x0000); + ks_wrreg16(ks, KS_ISR, 0xffff); + + /* shutdown RX/TX QMU */ + ks_disable_qmu(ks); + + /* set powermode to soft power down to save power */ + ks_set_powermode(ks, PMECR_PM_SOFTDOWN); + free_irq(netdev->irq, netdev); + mutex_unlock(&ks->lock); + return 0; +} + + +/** + * ks_write_qmu - write 1 pkt data to the QMU. + * @ks: The chip information + * @pdata: buffer address to save 1 pkt + * @len: Pkt length in byte + * Here is the sequence to write 1 pkt: + * 1. set sudo DMA mode + * 2. write status/length + * 3. write pkt data + * 4. reset sudo DMA Mode + * 5. reset sudo DMA mode + * 6. Wait until pkt is out + */ +static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len) +{ + /* start header at txb[0] to align txw entries */ + ks->txh.txw[0] = 0; + ks->txh.txw[1] = cpu_to_le16(len); + + /* 1. set sudo-DMA mode */ + ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff); + /* 2. write status/lenth info */ + ks_outblk(ks, ks->txh.txw, 4); + /* 3. write pkt data */ + ks_outblk(ks, (u16 *)pdata, ALIGN(len, 4)); + /* 4. reset sudo-DMA mode */ + ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr); + /* 5. Enqueue Tx(move the pkt from TX buffer into TXQ) */ + ks_wrreg16(ks, KS_TXQCR, TXQCR_METFE); + /* 6. wait until TXQCR_METFE is auto-cleared */ + while (ks_rdreg16(ks, KS_TXQCR) & TXQCR_METFE) + ; +} + +/** + * ks_start_xmit - transmit packet + * @skb : The buffer to transmit + * @netdev : The device used to transmit the packet. + * + * Called by the network layer to transmit the @skb. + * spin_lock_irqsave is required because tx and rx should be mutual exclusive. + * So while tx is in-progress, prevent IRQ interrupt from happenning. + */ +static int ks_start_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + int retv = NETDEV_TX_OK; + struct ks_net *ks = netdev_priv(netdev); + + disable_irq(netdev->irq); + ks_disable_int(ks); + spin_lock(&ks->statelock); + + /* Extra space are required: + * 4 byte for alignment, 4 for status/length, 4 for CRC + */ + + if (likely(ks_tx_fifo_space(ks) >= skb->len + 12)) { + ks_write_qmu(ks, skb->data, skb->len); + /* add tx statistics */ + netdev->stats.tx_bytes += skb->len; + netdev->stats.tx_packets++; + dev_kfree_skb(skb); + } else + retv = NETDEV_TX_BUSY; + spin_unlock(&ks->statelock); + ks_enable_int(ks); + enable_irq(netdev->irq); + return retv; +} + +/** + * ks_start_rx - ready to serve pkts + * @ks : The chip information + * + */ +static void ks_start_rx(struct ks_net *ks) +{ + u16 cntl; + + /* Enables QMU Receive (RXCR1). */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl |= RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, cntl); +} /* ks_start_rx */ + +/** + * ks_stop_rx - stop to serve pkts + * @ks : The chip information + * + */ +static void ks_stop_rx(struct ks_net *ks) +{ + u16 cntl; + + /* Disables QMU Receive (RXCR1). */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl &= ~RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, cntl); + +} /* ks_stop_rx */ + +static unsigned long const ethernet_polynomial = 0x04c11db7U; + +static unsigned long ether_gen_crc(int length, u8 *data) +{ + long crc = -1; + while (--length >= 0) { + u8 current_octet = *data++; + int bit; + + for (bit = 0; bit < 8; bit++, current_octet >>= 1) { + crc = (crc << 1) ^ + ((crc < 0) ^ (current_octet & 1) ? + ethernet_polynomial : 0); + } + } + return (unsigned long)crc; +} /* ether_gen_crc */ + +/** +* ks_set_grpaddr - set multicast information +* @ks : The chip information +*/ + +static void ks_set_grpaddr(struct ks_net *ks) +{ + u8 i; + u32 index, position, value; + + memset(ks->mcast_bits, 0, sizeof(u8) * HW_MCAST_SIZE); + + for (i = 0; i < ks->mcast_lst_size; i++) { + position = (ether_gen_crc(6, ks->mcast_lst[i]) >> 26) & 0x3f; + index = position >> 3; + value = 1 << (position & 7); + ks->mcast_bits[index] |= (u8)value; + } + + for (i = 0; i < HW_MCAST_SIZE; i++) { + if (i & 1) { + ks_wrreg16(ks, (u16)((KS_MAHTR0 + i) & ~1), + (ks->mcast_bits[i] << 8) | + ks->mcast_bits[i - 1]); + } + } +} /* ks_set_grpaddr */ + +/** +* ks_clear_mcast - clear multicast information +* +* @ks : The chip information +* This routine removes all mcast addresses set in the hardware. +*/ + +static void ks_clear_mcast(struct ks_net *ks) +{ + u16 i, mcast_size; + for (i = 0; i < HW_MCAST_SIZE; i++) + ks->mcast_bits[i] = 0; + + mcast_size = HW_MCAST_SIZE >> 2; + for (i = 0; i < mcast_size; i++) + ks_wrreg16(ks, KS_MAHTR0 + (2*i), 0); +} + +static void ks_set_promis(struct ks_net *ks, u16 promiscuous_mode) +{ + u16 cntl; + ks->promiscuous = promiscuous_mode; + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + cntl = ks_rdreg16(ks, KS_RXCR1); + + cntl &= ~RXCR1_FILTER_MASK; + if (promiscuous_mode) + /* Enable Promiscuous mode */ + cntl |= RXCR1_RXAE | RXCR1_RXINVF; + else + /* Disable Promiscuous mode (default normal mode) */ + cntl |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, cntl); + + if (ks->enabled) + ks_start_rx(ks); + +} /* ks_set_promis */ + +static void ks_set_mcast(struct ks_net *ks, u16 mcast) +{ + u16 cntl; + + ks->all_mcast = mcast; + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl &= ~RXCR1_FILTER_MASK; + if (mcast) + /* Enable "Perfect with Multicast address passed mode" */ + cntl |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA); + else + /** + * Disable "Perfect with Multicast address passed + * mode" (normal mode). + */ + cntl |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, cntl); + + if (ks->enabled) + ks_start_rx(ks); +} /* ks_set_mcast */ + +static void ks_set_rx_mode(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + struct netdev_hw_addr *ha; + + /* Turn on/off promiscuous mode. */ + if ((netdev->flags & IFF_PROMISC) == IFF_PROMISC) + ks_set_promis(ks, + (u16)((netdev->flags & IFF_PROMISC) == IFF_PROMISC)); + /* Turn on/off all mcast mode. */ + else if ((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI) + ks_set_mcast(ks, + (u16)((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI)); + else + ks_set_promis(ks, false); + + if ((netdev->flags & IFF_MULTICAST) && netdev_mc_count(netdev)) { + if (netdev_mc_count(netdev) <= MAX_MCAST_LST) { + int i = 0; + + netdev_for_each_mc_addr(ha, netdev) { + if (i >= MAX_MCAST_LST) + break; + memcpy(ks->mcast_lst[i++], ha->addr, ETH_ALEN); + } + ks->mcast_lst_size = (u8)i; + ks_set_grpaddr(ks); + } else { + /** + * List too big to support so + * turn on all mcast mode. + */ + ks->mcast_lst_size = MAX_MCAST_LST; + ks_set_mcast(ks, true); + } + } else { + ks->mcast_lst_size = 0; + ks_clear_mcast(ks); + } +} /* ks_set_rx_mode */ + +static void ks_set_mac(struct ks_net *ks, u8 *data) +{ + u16 *pw = (u16 *)data; + u16 w, u; + + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + + u = *pw++; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARH, w); + + u = *pw++; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARM, w); + + u = *pw; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARL, w); + + memcpy(ks->mac_addr, data, ETH_ALEN); + + if (ks->enabled) + ks_start_rx(ks); +} + +static int ks_set_mac_address(struct net_device *netdev, void *paddr) +{ + struct ks_net *ks = netdev_priv(netdev); + struct sockaddr *addr = paddr; + u8 *da; + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + + da = (u8 *)netdev->dev_addr; + + ks_set_mac(ks, da); + return 0; +} + +static int ks_net_ioctl(struct net_device *netdev, struct ifreq *req, int cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EINVAL; + + return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); +} + +static const struct net_device_ops ks_netdev_ops = { + .ndo_open = ks_net_open, + .ndo_stop = ks_net_stop, + .ndo_do_ioctl = ks_net_ioctl, + .ndo_start_xmit = ks_start_xmit, + .ndo_set_mac_address = ks_set_mac_address, + .ndo_set_rx_mode = ks_set_rx_mode, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + +/* ethtool support */ + +static void ks_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *di) +{ + strlcpy(di->driver, DRV_NAME, sizeof(di->driver)); + strlcpy(di->version, "1.00", sizeof(di->version)); + strlcpy(di->bus_info, dev_name(netdev->dev.parent), + sizeof(di->bus_info)); +} + +static u32 ks_get_msglevel(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return ks->msg_enable; +} + +static void ks_set_msglevel(struct net_device *netdev, u32 to) +{ + struct ks_net *ks = netdev_priv(netdev); + ks->msg_enable = to; +} + +static int ks_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_ethtool_gset(&ks->mii, cmd); +} + +static int ks_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_ethtool_sset(&ks->mii, cmd); +} + +static u32 ks_get_link(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_link_ok(&ks->mii); +} + +static int ks_nway_reset(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_nway_restart(&ks->mii); +} + +static const struct ethtool_ops ks_ethtool_ops = { + .get_drvinfo = ks_get_drvinfo, + .get_msglevel = ks_get_msglevel, + .set_msglevel = ks_set_msglevel, + .get_settings = ks_get_settings, + .set_settings = ks_set_settings, + .get_link = ks_get_link, + .nway_reset = ks_nway_reset, +}; + +/* MII interface controls */ + +/** + * ks_phy_reg - convert MII register into a KS8851 register + * @reg: MII register number. + * + * Return the KS8851 register number for the corresponding MII PHY register + * if possible. Return zero if the MII register has no direct mapping to the + * KS8851 register set. + */ +static int ks_phy_reg(int reg) +{ + switch (reg) { + case MII_BMCR: + return KS_P1MBCR; + case MII_BMSR: + return KS_P1MBSR; + case MII_PHYSID1: + return KS_PHY1ILR; + case MII_PHYSID2: + return KS_PHY1IHR; + case MII_ADVERTISE: + return KS_P1ANAR; + case MII_LPA: + return KS_P1ANLPR; + } + + return 0x0; +} + +/** + * ks_phy_read - MII interface PHY register read. + * @netdev: The network device the PHY is on. + * @phy_addr: Address of PHY (ignored as we only have one) + * @reg: The register to read. + * + * This call reads data from the PHY register specified in @reg. Since the + * device does not support all the MII registers, the non-existent values + * are always returned as zero. + * + * We return zero for unsupported registers as the MII code does not check + * the value returned for any error status, and simply returns it to the + * caller. The mii-tool that the driver was tested with takes any -ve error + * as real PHY capabilities, thus displaying incorrect data to the user. + */ +static int ks_phy_read(struct net_device *netdev, int phy_addr, int reg) +{ + struct ks_net *ks = netdev_priv(netdev); + int ksreg; + int result; + + ksreg = ks_phy_reg(reg); + if (!ksreg) + return 0x0; /* no error return allowed, so use zero */ + + mutex_lock(&ks->lock); + result = ks_rdreg16(ks, ksreg); + mutex_unlock(&ks->lock); + + return result; +} + +static void ks_phy_write(struct net_device *netdev, + int phy, int reg, int value) +{ + struct ks_net *ks = netdev_priv(netdev); + int ksreg; + + ksreg = ks_phy_reg(reg); + if (ksreg) { + mutex_lock(&ks->lock); + ks_wrreg16(ks, ksreg, value); + mutex_unlock(&ks->lock); + } +} + +/** + * ks_read_selftest - read the selftest memory info. + * @ks: The device state + * + * Read and check the TX/RX memory selftest information. + */ +static int ks_read_selftest(struct ks_net *ks) +{ + unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; + int ret = 0; + unsigned rd; + + rd = ks_rdreg16(ks, KS_MBIR); + + if ((rd & both_done) != both_done) { + netdev_warn(ks->netdev, "Memory selftest not finished\n"); + return 0; + } + + if (rd & MBIR_TXMBFA) { + netdev_err(ks->netdev, "TX memory selftest fails\n"); + ret |= 1; + } + + if (rd & MBIR_RXMBFA) { + netdev_err(ks->netdev, "RX memory selftest fails\n"); + ret |= 2; + } + + netdev_info(ks->netdev, "the selftest passes\n"); + return ret; +} + +static void ks_setup(struct ks_net *ks) +{ + u16 w; + + /** + * Configure QMU Transmit + */ + + /* Setup Transmit Frame Data Pointer Auto-Increment (TXFDPR) */ + ks_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); + + /* Setup Receive Frame Data Pointer Auto-Increment */ + ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI); + + /* Setup Receive Frame Threshold - 1 frame (RXFCTFC) */ + ks_wrreg16(ks, KS_RXFCTR, 1 & RXFCTR_THRESHOLD_MASK); + + /* Setup RxQ Command Control (RXQCR) */ + ks->rc_rxqcr = RXQCR_CMD_CNTL; + ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); + + /** + * set the force mode to half duplex, default is full duplex + * because if the auto-negotiation fails, most switch uses + * half-duplex. + */ + + w = ks_rdreg16(ks, KS_P1MBCR); + w &= ~P1MBCR_FORCE_FDX; + ks_wrreg16(ks, KS_P1MBCR, w); + + w = TXCR_TXFCE | TXCR_TXPE | TXCR_TXCRC | TXCR_TCGIP; + ks_wrreg16(ks, KS_TXCR, w); + + w = RXCR1_RXFCE | RXCR1_RXBE | RXCR1_RXUE | RXCR1_RXME | RXCR1_RXIPFCC; + + if (ks->promiscuous) /* bPromiscuous */ + w |= (RXCR1_RXAE | RXCR1_RXINVF); + else if (ks->all_mcast) /* Multicast address passed mode */ + w |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA); + else /* Normal mode */ + w |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, w); +} /*ks_setup */ + + +static void ks_setup_int(struct ks_net *ks) +{ + ks->rc_ier = 0x00; + /* Clear the interrupts status of the hardware. */ + ks_wrreg16(ks, KS_ISR, 0xffff); + + /* Enables the interrupts of the hardware. */ + ks->rc_ier = (IRQ_LCI | IRQ_TXI | IRQ_RXI); +} /* ks_setup_int */ + +static int ks_hw_init(struct ks_net *ks) +{ +#define MHEADER_SIZE (sizeof(struct type_frame_head) * MAX_RECV_FRAMES) + ks->promiscuous = 0; + ks->all_mcast = 0; + ks->mcast_lst_size = 0; + + ks->frame_head_info = kmalloc(MHEADER_SIZE, GFP_KERNEL); + if (!ks->frame_head_info) + return false; + + ks_set_mac(ks, KS_DEFAULT_MAC_ADDRESS); + return true; +} + +#if defined(CONFIG_OF) +static const struct of_device_id ks8851_ml_dt_ids[] = { + { .compatible = "micrel,ks8851-mll" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ks8851_ml_dt_ids); +#endif + +static int ks8851_probe(struct platform_device *pdev) +{ + int err = -ENOMEM; + struct resource *io_d, *io_c; + struct net_device *netdev; + struct ks_net *ks; + u16 id, data; + const char *mac; + + io_d = platform_get_resource(pdev, IORESOURCE_MEM, 0); + io_c = platform_get_resource(pdev, IORESOURCE_MEM, 1); + + if (!request_mem_region(io_d->start, resource_size(io_d), DRV_NAME)) + goto err_mem_region; + + if (!request_mem_region(io_c->start, resource_size(io_c), DRV_NAME)) + goto err_mem_region1; + + netdev = alloc_etherdev(sizeof(struct ks_net)); + if (!netdev) + goto err_alloc_etherdev; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + ks = netdev_priv(netdev); + ks->netdev = netdev; + ks->hw_addr = ioremap(io_d->start, resource_size(io_d)); + + if (!ks->hw_addr) + goto err_ioremap; + + ks->hw_addr_cmd = ioremap(io_c->start, resource_size(io_c)); + if (!ks->hw_addr_cmd) + goto err_ioremap1; + + netdev->irq = platform_get_irq(pdev, 0); + + if ((int)netdev->irq < 0) { + err = netdev->irq; + goto err_get_irq; + } + + ks->pdev = pdev; + + mutex_init(&ks->lock); + spin_lock_init(&ks->statelock); + + netdev->netdev_ops = &ks_netdev_ops; + netdev->ethtool_ops = &ks_ethtool_ops; + + /* setup mii state */ + ks->mii.dev = netdev; + ks->mii.phy_id = 1, + ks->mii.phy_id_mask = 1; + ks->mii.reg_num_mask = 0xf; + ks->mii.mdio_read = ks_phy_read; + ks->mii.mdio_write = ks_phy_write; + + netdev_info(netdev, "message enable is %d\n", msg_enable); + /* set the default message enable */ + ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | + NETIF_MSG_PROBE | + NETIF_MSG_LINK)); + ks_read_config(ks); + + /* simple check for a valid chip being connected to the bus */ + if ((ks_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) { + netdev_err(netdev, "failed to read device ID\n"); + err = -ENODEV; + goto err_register; + } + + if (ks_read_selftest(ks)) { + netdev_err(netdev, "failed to read device ID\n"); + err = -ENODEV; + goto err_register; + } + + err = register_netdev(netdev); + if (err) + goto err_register; + + platform_set_drvdata(pdev, netdev); + + ks_soft_reset(ks, GRR_GSR); + ks_hw_init(ks); + ks_disable_qmu(ks); + ks_setup(ks); + ks_setup_int(ks); + + data = ks_rdreg16(ks, KS_OBCR); + ks_wrreg16(ks, KS_OBCR, data | OBCR_ODS_16MA); + + /* overwriting the default MAC address */ + if (pdev->dev.of_node) { + mac = of_get_mac_address(pdev->dev.of_node); + if (mac) + memcpy(ks->mac_addr, mac, ETH_ALEN); + } else { + struct ks8851_mll_platform_data *pdata; + + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) { + netdev_err(netdev, "No platform data\n"); + err = -ENODEV; + goto err_pdata; + } + memcpy(ks->mac_addr, pdata->mac_addr, ETH_ALEN); + } + if (!is_valid_ether_addr(ks->mac_addr)) { + /* Use random MAC address if none passed */ + eth_random_addr(ks->mac_addr); + netdev_info(netdev, "Using random mac address\n"); + } + netdev_info(netdev, "Mac address is: %pM\n", ks->mac_addr); + + memcpy(netdev->dev_addr, ks->mac_addr, ETH_ALEN); + + ks_set_mac(ks, netdev->dev_addr); + + id = ks_rdreg16(ks, KS_CIDER); + + netdev_info(netdev, "Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n", + (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); + return 0; + +err_pdata: + unregister_netdev(netdev); +err_register: +err_get_irq: + iounmap(ks->hw_addr_cmd); +err_ioremap1: + iounmap(ks->hw_addr); +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + release_mem_region(io_c->start, resource_size(io_c)); +err_mem_region1: + release_mem_region(io_d->start, resource_size(io_d)); +err_mem_region: + return err; +} + +static int ks8851_remove(struct platform_device *pdev) +{ + struct net_device *netdev = platform_get_drvdata(pdev); + struct ks_net *ks = netdev_priv(netdev); + struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + kfree(ks->frame_head_info); + unregister_netdev(netdev); + iounmap(ks->hw_addr); + free_netdev(netdev); + release_mem_region(iomem->start, resource_size(iomem)); + return 0; + +} + +static struct platform_driver ks8851_platform_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(ks8851_ml_dt_ids), + }, + .probe = ks8851_probe, + .remove = ks8851_remove, +}; + +module_platform_driver(ks8851_platform_driver); + +MODULE_DESCRIPTION("KS8851 MLL Network driver"); +MODULE_AUTHOR("David Choi <david.choi@micrel.com>"); +MODULE_LICENSE("GPL"); +module_param_named(message, msg_enable, int, 0); +MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); + diff --git a/drivers/net/ethernet/micrel/ksz884x.c b/drivers/net/ethernet/micrel/ksz884x.c new file mode 100644 index 00000000000..064a48d0c36 --- /dev/null +++ b/drivers/net/ethernet/micrel/ksz884x.c @@ -0,0 +1,7264 @@ +/** + * drivers/net/ethernet/micrel/ksx884x.c - Micrel KSZ8841/2 PCI Ethernet driver + * + * Copyright (c) 2009-2010 Micrel, Inc. + * Tristram Ha <Tristram.Ha@micrel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/mii.h> +#include <linux/platform_device.h> +#include <linux/ethtool.h> +#include <linux/etherdevice.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/if_vlan.h> +#include <linux/crc32.h> +#include <linux/sched.h> +#include <linux/slab.h> + + +/* DMA Registers */ + +#define KS_DMA_TX_CTRL 0x0000 +#define DMA_TX_ENABLE 0x00000001 +#define DMA_TX_CRC_ENABLE 0x00000002 +#define DMA_TX_PAD_ENABLE 0x00000004 +#define DMA_TX_LOOPBACK 0x00000100 +#define DMA_TX_FLOW_ENABLE 0x00000200 +#define DMA_TX_CSUM_IP 0x00010000 +#define DMA_TX_CSUM_TCP 0x00020000 +#define DMA_TX_CSUM_UDP 0x00040000 +#define DMA_TX_BURST_SIZE 0x3F000000 + +#define KS_DMA_RX_CTRL 0x0004 +#define DMA_RX_ENABLE 0x00000001 +#define KS884X_DMA_RX_MULTICAST 0x00000002 +#define DMA_RX_PROMISCUOUS 0x00000004 +#define DMA_RX_ERROR 0x00000008 +#define DMA_RX_UNICAST 0x00000010 +#define DMA_RX_ALL_MULTICAST 0x00000020 +#define DMA_RX_BROADCAST 0x00000040 +#define DMA_RX_FLOW_ENABLE 0x00000200 +#define DMA_RX_CSUM_IP 0x00010000 +#define DMA_RX_CSUM_TCP 0x00020000 +#define DMA_RX_CSUM_UDP 0x00040000 +#define DMA_RX_BURST_SIZE 0x3F000000 + +#define DMA_BURST_SHIFT 24 +#define DMA_BURST_DEFAULT 8 + +#define KS_DMA_TX_START 0x0008 +#define KS_DMA_RX_START 0x000C +#define DMA_START 0x00000001 + +#define KS_DMA_TX_ADDR 0x0010 +#define KS_DMA_RX_ADDR 0x0014 + +#define DMA_ADDR_LIST_MASK 0xFFFFFFFC +#define DMA_ADDR_LIST_SHIFT 2 + +/* MTR0 */ +#define KS884X_MULTICAST_0_OFFSET 0x0020 +#define KS884X_MULTICAST_1_OFFSET 0x0021 +#define KS884X_MULTICAST_2_OFFSET 0x0022 +#define KS884x_MULTICAST_3_OFFSET 0x0023 +/* MTR1 */ +#define KS884X_MULTICAST_4_OFFSET 0x0024 +#define KS884X_MULTICAST_5_OFFSET 0x0025 +#define KS884X_MULTICAST_6_OFFSET 0x0026 +#define KS884X_MULTICAST_7_OFFSET 0x0027 + +/* Interrupt Registers */ + +/* INTEN */ +#define KS884X_INTERRUPTS_ENABLE 0x0028 +/* INTST */ +#define KS884X_INTERRUPTS_STATUS 0x002C + +#define KS884X_INT_RX_STOPPED 0x02000000 +#define KS884X_INT_TX_STOPPED 0x04000000 +#define KS884X_INT_RX_OVERRUN 0x08000000 +#define KS884X_INT_TX_EMPTY 0x10000000 +#define KS884X_INT_RX 0x20000000 +#define KS884X_INT_TX 0x40000000 +#define KS884X_INT_PHY 0x80000000 + +#define KS884X_INT_RX_MASK \ + (KS884X_INT_RX | KS884X_INT_RX_OVERRUN) +#define KS884X_INT_TX_MASK \ + (KS884X_INT_TX | KS884X_INT_TX_EMPTY) +#define KS884X_INT_MASK (KS884X_INT_RX | KS884X_INT_TX | KS884X_INT_PHY) + +/* MAC Additional Station Address */ + +/* MAAL0 */ +#define KS_ADD_ADDR_0_LO 0x0080 +/* MAAH0 */ +#define KS_ADD_ADDR_0_HI 0x0084 +/* MAAL1 */ +#define KS_ADD_ADDR_1_LO 0x0088 +/* MAAH1 */ +#define KS_ADD_ADDR_1_HI 0x008C +/* MAAL2 */ +#define KS_ADD_ADDR_2_LO 0x0090 +/* MAAH2 */ +#define KS_ADD_ADDR_2_HI 0x0094 +/* MAAL3 */ +#define KS_ADD_ADDR_3_LO 0x0098 +/* MAAH3 */ +#define KS_ADD_ADDR_3_HI 0x009C +/* MAAL4 */ +#define KS_ADD_ADDR_4_LO 0x00A0 +/* MAAH4 */ +#define KS_ADD_ADDR_4_HI 0x00A4 +/* MAAL5 */ +#define KS_ADD_ADDR_5_LO 0x00A8 +/* MAAH5 */ +#define KS_ADD_ADDR_5_HI 0x00AC +/* MAAL6 */ +#define KS_ADD_ADDR_6_LO 0x00B0 +/* MAAH6 */ +#define KS_ADD_ADDR_6_HI 0x00B4 +/* MAAL7 */ +#define KS_ADD_ADDR_7_LO 0x00B8 +/* MAAH7 */ +#define KS_ADD_ADDR_7_HI 0x00BC +/* MAAL8 */ +#define KS_ADD_ADDR_8_LO 0x00C0 +/* MAAH8 */ +#define KS_ADD_ADDR_8_HI 0x00C4 +/* MAAL9 */ +#define KS_ADD_ADDR_9_LO 0x00C8 +/* MAAH9 */ +#define KS_ADD_ADDR_9_HI 0x00CC +/* MAAL10 */ +#define KS_ADD_ADDR_A_LO 0x00D0 +/* MAAH10 */ +#define KS_ADD_ADDR_A_HI 0x00D4 +/* MAAL11 */ +#define KS_ADD_ADDR_B_LO 0x00D8 +/* MAAH11 */ +#define KS_ADD_ADDR_B_HI 0x00DC +/* MAAL12 */ +#define KS_ADD_ADDR_C_LO 0x00E0 +/* MAAH12 */ +#define KS_ADD_ADDR_C_HI 0x00E4 +/* MAAL13 */ +#define KS_ADD_ADDR_D_LO 0x00E8 +/* MAAH13 */ +#define KS_ADD_ADDR_D_HI 0x00EC +/* MAAL14 */ +#define KS_ADD_ADDR_E_LO 0x00F0 +/* MAAH14 */ +#define KS_ADD_ADDR_E_HI 0x00F4 +/* MAAL15 */ +#define KS_ADD_ADDR_F_LO 0x00F8 +/* MAAH15 */ +#define KS_ADD_ADDR_F_HI 0x00FC + +#define ADD_ADDR_HI_MASK 0x0000FFFF +#define ADD_ADDR_ENABLE 0x80000000 +#define ADD_ADDR_INCR 8 + +/* Miscellaneous Registers */ + +/* MARL */ +#define KS884X_ADDR_0_OFFSET 0x0200 +#define KS884X_ADDR_1_OFFSET 0x0201 +/* MARM */ +#define KS884X_ADDR_2_OFFSET 0x0202 +#define KS884X_ADDR_3_OFFSET 0x0203 +/* MARH */ +#define KS884X_ADDR_4_OFFSET 0x0204 +#define KS884X_ADDR_5_OFFSET 0x0205 + +/* OBCR */ +#define KS884X_BUS_CTRL_OFFSET 0x0210 + +#define BUS_SPEED_125_MHZ 0x0000 +#define BUS_SPEED_62_5_MHZ 0x0001 +#define BUS_SPEED_41_66_MHZ 0x0002 +#define BUS_SPEED_25_MHZ 0x0003 + +/* EEPCR */ +#define KS884X_EEPROM_CTRL_OFFSET 0x0212 + +#define EEPROM_CHIP_SELECT 0x0001 +#define EEPROM_SERIAL_CLOCK 0x0002 +#define EEPROM_DATA_OUT 0x0004 +#define EEPROM_DATA_IN 0x0008 +#define EEPROM_ACCESS_ENABLE 0x0010 + +/* MBIR */ +#define KS884X_MEM_INFO_OFFSET 0x0214 + +#define RX_MEM_TEST_FAILED 0x0008 +#define RX_MEM_TEST_FINISHED 0x0010 +#define TX_MEM_TEST_FAILED 0x0800 +#define TX_MEM_TEST_FINISHED 0x1000 + +/* GCR */ +#define KS884X_GLOBAL_CTRL_OFFSET 0x0216 +#define GLOBAL_SOFTWARE_RESET 0x0001 + +#define KS8841_POWER_MANAGE_OFFSET 0x0218 + +/* WFCR */ +#define KS8841_WOL_CTRL_OFFSET 0x021A +#define KS8841_WOL_MAGIC_ENABLE 0x0080 +#define KS8841_WOL_FRAME3_ENABLE 0x0008 +#define KS8841_WOL_FRAME2_ENABLE 0x0004 +#define KS8841_WOL_FRAME1_ENABLE 0x0002 +#define KS8841_WOL_FRAME0_ENABLE 0x0001 + +/* WF0 */ +#define KS8841_WOL_FRAME_CRC_OFFSET 0x0220 +#define KS8841_WOL_FRAME_BYTE0_OFFSET 0x0224 +#define KS8841_WOL_FRAME_BYTE2_OFFSET 0x0228 + +/* IACR */ +#define KS884X_IACR_P 0x04A0 +#define KS884X_IACR_OFFSET KS884X_IACR_P + +/* IADR1 */ +#define KS884X_IADR1_P 0x04A2 +#define KS884X_IADR2_P 0x04A4 +#define KS884X_IADR3_P 0x04A6 +#define KS884X_IADR4_P 0x04A8 +#define KS884X_IADR5_P 0x04AA + +#define KS884X_ACC_CTRL_SEL_OFFSET KS884X_IACR_P +#define KS884X_ACC_CTRL_INDEX_OFFSET (KS884X_ACC_CTRL_SEL_OFFSET + 1) + +#define KS884X_ACC_DATA_0_OFFSET KS884X_IADR4_P +#define KS884X_ACC_DATA_1_OFFSET (KS884X_ACC_DATA_0_OFFSET + 1) +#define KS884X_ACC_DATA_2_OFFSET KS884X_IADR5_P +#define KS884X_ACC_DATA_3_OFFSET (KS884X_ACC_DATA_2_OFFSET + 1) +#define KS884X_ACC_DATA_4_OFFSET KS884X_IADR2_P +#define KS884X_ACC_DATA_5_OFFSET (KS884X_ACC_DATA_4_OFFSET + 1) +#define KS884X_ACC_DATA_6_OFFSET KS884X_IADR3_P +#define KS884X_ACC_DATA_7_OFFSET (KS884X_ACC_DATA_6_OFFSET + 1) +#define KS884X_ACC_DATA_8_OFFSET KS884X_IADR1_P + +/* P1MBCR */ +#define KS884X_P1MBCR_P 0x04D0 +#define KS884X_P1MBSR_P 0x04D2 +#define KS884X_PHY1ILR_P 0x04D4 +#define KS884X_PHY1IHR_P 0x04D6 +#define KS884X_P1ANAR_P 0x04D8 +#define KS884X_P1ANLPR_P 0x04DA + +/* P2MBCR */ +#define KS884X_P2MBCR_P 0x04E0 +#define KS884X_P2MBSR_P 0x04E2 +#define KS884X_PHY2ILR_P 0x04E4 +#define KS884X_PHY2IHR_P 0x04E6 +#define KS884X_P2ANAR_P 0x04E8 +#define KS884X_P2ANLPR_P 0x04EA + +#define KS884X_PHY_1_CTRL_OFFSET KS884X_P1MBCR_P +#define PHY_CTRL_INTERVAL (KS884X_P2MBCR_P - KS884X_P1MBCR_P) + +#define KS884X_PHY_CTRL_OFFSET 0x00 + +/* Mode Control Register */ +#define PHY_REG_CTRL 0 + +#define PHY_RESET 0x8000 +#define PHY_LOOPBACK 0x4000 +#define PHY_SPEED_100MBIT 0x2000 +#define PHY_AUTO_NEG_ENABLE 0x1000 +#define PHY_POWER_DOWN 0x0800 +#define PHY_MII_DISABLE 0x0400 +#define PHY_AUTO_NEG_RESTART 0x0200 +#define PHY_FULL_DUPLEX 0x0100 +#define PHY_COLLISION_TEST 0x0080 +#define PHY_HP_MDIX 0x0020 +#define PHY_FORCE_MDIX 0x0010 +#define PHY_AUTO_MDIX_DISABLE 0x0008 +#define PHY_REMOTE_FAULT_DISABLE 0x0004 +#define PHY_TRANSMIT_DISABLE 0x0002 +#define PHY_LED_DISABLE 0x0001 + +#define KS884X_PHY_STATUS_OFFSET 0x02 + +/* Mode Status Register */ +#define PHY_REG_STATUS 1 + +#define PHY_100BT4_CAPABLE 0x8000 +#define PHY_100BTX_FD_CAPABLE 0x4000 +#define PHY_100BTX_CAPABLE 0x2000 +#define PHY_10BT_FD_CAPABLE 0x1000 +#define PHY_10BT_CAPABLE 0x0800 +#define PHY_MII_SUPPRESS_CAPABLE 0x0040 +#define PHY_AUTO_NEG_ACKNOWLEDGE 0x0020 +#define PHY_REMOTE_FAULT 0x0010 +#define PHY_AUTO_NEG_CAPABLE 0x0008 +#define PHY_LINK_STATUS 0x0004 +#define PHY_JABBER_DETECT 0x0002 +#define PHY_EXTENDED_CAPABILITY 0x0001 + +#define KS884X_PHY_ID_1_OFFSET 0x04 +#define KS884X_PHY_ID_2_OFFSET 0x06 + +/* PHY Identifier Registers */ +#define PHY_REG_ID_1 2 +#define PHY_REG_ID_2 3 + +#define KS884X_PHY_AUTO_NEG_OFFSET 0x08 + +/* Auto-Negotiation Advertisement Register */ +#define PHY_REG_AUTO_NEGOTIATION 4 + +#define PHY_AUTO_NEG_NEXT_PAGE 0x8000 +#define PHY_AUTO_NEG_REMOTE_FAULT 0x2000 +/* Not supported. */ +#define PHY_AUTO_NEG_ASYM_PAUSE 0x0800 +#define PHY_AUTO_NEG_SYM_PAUSE 0x0400 +#define PHY_AUTO_NEG_100BT4 0x0200 +#define PHY_AUTO_NEG_100BTX_FD 0x0100 +#define PHY_AUTO_NEG_100BTX 0x0080 +#define PHY_AUTO_NEG_10BT_FD 0x0040 +#define PHY_AUTO_NEG_10BT 0x0020 +#define PHY_AUTO_NEG_SELECTOR 0x001F +#define PHY_AUTO_NEG_802_3 0x0001 + +#define PHY_AUTO_NEG_PAUSE (PHY_AUTO_NEG_SYM_PAUSE | PHY_AUTO_NEG_ASYM_PAUSE) + +#define KS884X_PHY_REMOTE_CAP_OFFSET 0x0A + +/* Auto-Negotiation Link Partner Ability Register */ +#define PHY_REG_REMOTE_CAPABILITY 5 + +#define PHY_REMOTE_NEXT_PAGE 0x8000 +#define PHY_REMOTE_ACKNOWLEDGE 0x4000 +#define PHY_REMOTE_REMOTE_FAULT 0x2000 +#define PHY_REMOTE_SYM_PAUSE 0x0400 +#define PHY_REMOTE_100BTX_FD 0x0100 +#define PHY_REMOTE_100BTX 0x0080 +#define PHY_REMOTE_10BT_FD 0x0040 +#define PHY_REMOTE_10BT 0x0020 + +/* P1VCT */ +#define KS884X_P1VCT_P 0x04F0 +#define KS884X_P1PHYCTRL_P 0x04F2 + +/* P2VCT */ +#define KS884X_P2VCT_P 0x04F4 +#define KS884X_P2PHYCTRL_P 0x04F6 + +#define KS884X_PHY_SPECIAL_OFFSET KS884X_P1VCT_P +#define PHY_SPECIAL_INTERVAL (KS884X_P2VCT_P - KS884X_P1VCT_P) + +#define KS884X_PHY_LINK_MD_OFFSET 0x00 + +#define PHY_START_CABLE_DIAG 0x8000 +#define PHY_CABLE_DIAG_RESULT 0x6000 +#define PHY_CABLE_STAT_NORMAL 0x0000 +#define PHY_CABLE_STAT_OPEN 0x2000 +#define PHY_CABLE_STAT_SHORT 0x4000 +#define PHY_CABLE_STAT_FAILED 0x6000 +#define PHY_CABLE_10M_SHORT 0x1000 +#define PHY_CABLE_FAULT_COUNTER 0x01FF + +#define KS884X_PHY_PHY_CTRL_OFFSET 0x02 + +#define PHY_STAT_REVERSED_POLARITY 0x0020 +#define PHY_STAT_MDIX 0x0010 +#define PHY_FORCE_LINK 0x0008 +#define PHY_POWER_SAVING_DISABLE 0x0004 +#define PHY_REMOTE_LOOPBACK 0x0002 + +/* SIDER */ +#define KS884X_SIDER_P 0x0400 +#define KS884X_CHIP_ID_OFFSET KS884X_SIDER_P +#define KS884X_FAMILY_ID_OFFSET (KS884X_CHIP_ID_OFFSET + 1) + +#define REG_FAMILY_ID 0x88 + +#define REG_CHIP_ID_41 0x8810 +#define REG_CHIP_ID_42 0x8800 + +#define KS884X_CHIP_ID_MASK_41 0xFF10 +#define KS884X_CHIP_ID_MASK 0xFFF0 +#define KS884X_CHIP_ID_SHIFT 4 +#define KS884X_REVISION_MASK 0x000E +#define KS884X_REVISION_SHIFT 1 +#define KS8842_START 0x0001 + +#define CHIP_IP_41_M 0x8810 +#define CHIP_IP_42_M 0x8800 +#define CHIP_IP_61_M 0x8890 +#define CHIP_IP_62_M 0x8880 + +#define CHIP_IP_41_P 0x8850 +#define CHIP_IP_42_P 0x8840 +#define CHIP_IP_61_P 0x88D0 +#define CHIP_IP_62_P 0x88C0 + +/* SGCR1 */ +#define KS8842_SGCR1_P 0x0402 +#define KS8842_SWITCH_CTRL_1_OFFSET KS8842_SGCR1_P + +#define SWITCH_PASS_ALL 0x8000 +#define SWITCH_TX_FLOW_CTRL 0x2000 +#define SWITCH_RX_FLOW_CTRL 0x1000 +#define SWITCH_CHECK_LENGTH 0x0800 +#define SWITCH_AGING_ENABLE 0x0400 +#define SWITCH_FAST_AGING 0x0200 +#define SWITCH_AGGR_BACKOFF 0x0100 +#define SWITCH_PASS_PAUSE 0x0008 +#define SWITCH_LINK_AUTO_AGING 0x0001 + +/* SGCR2 */ +#define KS8842_SGCR2_P 0x0404 +#define KS8842_SWITCH_CTRL_2_OFFSET KS8842_SGCR2_P + +#define SWITCH_VLAN_ENABLE 0x8000 +#define SWITCH_IGMP_SNOOP 0x4000 +#define IPV6_MLD_SNOOP_ENABLE 0x2000 +#define IPV6_MLD_SNOOP_OPTION 0x1000 +#define PRIORITY_SCHEME_SELECT 0x0800 +#define SWITCH_MIRROR_RX_TX 0x0100 +#define UNICAST_VLAN_BOUNDARY 0x0080 +#define MULTICAST_STORM_DISABLE 0x0040 +#define SWITCH_BACK_PRESSURE 0x0020 +#define FAIR_FLOW_CTRL 0x0010 +#define NO_EXC_COLLISION_DROP 0x0008 +#define SWITCH_HUGE_PACKET 0x0004 +#define SWITCH_LEGAL_PACKET 0x0002 +#define SWITCH_BUF_RESERVE 0x0001 + +/* SGCR3 */ +#define KS8842_SGCR3_P 0x0406 +#define KS8842_SWITCH_CTRL_3_OFFSET KS8842_SGCR3_P + +#define BROADCAST_STORM_RATE_LO 0xFF00 +#define SWITCH_REPEATER 0x0080 +#define SWITCH_HALF_DUPLEX 0x0040 +#define SWITCH_FLOW_CTRL 0x0020 +#define SWITCH_10_MBIT 0x0010 +#define SWITCH_REPLACE_NULL_VID 0x0008 +#define BROADCAST_STORM_RATE_HI 0x0007 + +#define BROADCAST_STORM_RATE 0x07FF + +/* SGCR4 */ +#define KS8842_SGCR4_P 0x0408 + +/* SGCR5 */ +#define KS8842_SGCR5_P 0x040A +#define KS8842_SWITCH_CTRL_5_OFFSET KS8842_SGCR5_P + +#define LED_MODE 0x8200 +#define LED_SPEED_DUPLEX_ACT 0x0000 +#define LED_SPEED_DUPLEX_LINK_ACT 0x8000 +#define LED_DUPLEX_10_100 0x0200 + +/* SGCR6 */ +#define KS8842_SGCR6_P 0x0410 +#define KS8842_SWITCH_CTRL_6_OFFSET KS8842_SGCR6_P + +#define KS8842_PRIORITY_MASK 3 +#define KS8842_PRIORITY_SHIFT 2 + +/* SGCR7 */ +#define KS8842_SGCR7_P 0x0412 +#define KS8842_SWITCH_CTRL_7_OFFSET KS8842_SGCR7_P + +#define SWITCH_UNK_DEF_PORT_ENABLE 0x0008 +#define SWITCH_UNK_DEF_PORT_3 0x0004 +#define SWITCH_UNK_DEF_PORT_2 0x0002 +#define SWITCH_UNK_DEF_PORT_1 0x0001 + +/* MACAR1 */ +#define KS8842_MACAR1_P 0x0470 +#define KS8842_MACAR2_P 0x0472 +#define KS8842_MACAR3_P 0x0474 +#define KS8842_MAC_ADDR_1_OFFSET KS8842_MACAR1_P +#define KS8842_MAC_ADDR_0_OFFSET (KS8842_MAC_ADDR_1_OFFSET + 1) +#define KS8842_MAC_ADDR_3_OFFSET KS8842_MACAR2_P +#define KS8842_MAC_ADDR_2_OFFSET (KS8842_MAC_ADDR_3_OFFSET + 1) +#define KS8842_MAC_ADDR_5_OFFSET KS8842_MACAR3_P +#define KS8842_MAC_ADDR_4_OFFSET (KS8842_MAC_ADDR_5_OFFSET + 1) + +/* TOSR1 */ +#define KS8842_TOSR1_P 0x0480 +#define KS8842_TOSR2_P 0x0482 +#define KS8842_TOSR3_P 0x0484 +#define KS8842_TOSR4_P 0x0486 +#define KS8842_TOSR5_P 0x0488 +#define KS8842_TOSR6_P 0x048A +#define KS8842_TOSR7_P 0x0490 +#define KS8842_TOSR8_P 0x0492 +#define KS8842_TOS_1_OFFSET KS8842_TOSR1_P +#define KS8842_TOS_2_OFFSET KS8842_TOSR2_P +#define KS8842_TOS_3_OFFSET KS8842_TOSR3_P +#define KS8842_TOS_4_OFFSET KS8842_TOSR4_P +#define KS8842_TOS_5_OFFSET KS8842_TOSR5_P +#define KS8842_TOS_6_OFFSET KS8842_TOSR6_P + +#define KS8842_TOS_7_OFFSET KS8842_TOSR7_P +#define KS8842_TOS_8_OFFSET KS8842_TOSR8_P + +/* P1CR1 */ +#define KS8842_P1CR1_P 0x0500 +#define KS8842_P1CR2_P 0x0502 +#define KS8842_P1VIDR_P 0x0504 +#define KS8842_P1CR3_P 0x0506 +#define KS8842_P1IRCR_P 0x0508 +#define KS8842_P1ERCR_P 0x050A +#define KS884X_P1SCSLMD_P 0x0510 +#define KS884X_P1CR4_P 0x0512 +#define KS884X_P1SR_P 0x0514 + +/* P2CR1 */ +#define KS8842_P2CR1_P 0x0520 +#define KS8842_P2CR2_P 0x0522 +#define KS8842_P2VIDR_P 0x0524 +#define KS8842_P2CR3_P 0x0526 +#define KS8842_P2IRCR_P 0x0528 +#define KS8842_P2ERCR_P 0x052A +#define KS884X_P2SCSLMD_P 0x0530 +#define KS884X_P2CR4_P 0x0532 +#define KS884X_P2SR_P 0x0534 + +/* P3CR1 */ +#define KS8842_P3CR1_P 0x0540 +#define KS8842_P3CR2_P 0x0542 +#define KS8842_P3VIDR_P 0x0544 +#define KS8842_P3CR3_P 0x0546 +#define KS8842_P3IRCR_P 0x0548 +#define KS8842_P3ERCR_P 0x054A + +#define KS8842_PORT_1_CTRL_1 KS8842_P1CR1_P +#define KS8842_PORT_2_CTRL_1 KS8842_P2CR1_P +#define KS8842_PORT_3_CTRL_1 KS8842_P3CR1_P + +#define PORT_CTRL_ADDR(port, addr) \ + (addr = KS8842_PORT_1_CTRL_1 + (port) * \ + (KS8842_PORT_2_CTRL_1 - KS8842_PORT_1_CTRL_1)) + +#define KS8842_PORT_CTRL_1_OFFSET 0x00 + +#define PORT_BROADCAST_STORM 0x0080 +#define PORT_DIFFSERV_ENABLE 0x0040 +#define PORT_802_1P_ENABLE 0x0020 +#define PORT_BASED_PRIORITY_MASK 0x0018 +#define PORT_BASED_PRIORITY_BASE 0x0003 +#define PORT_BASED_PRIORITY_SHIFT 3 +#define PORT_BASED_PRIORITY_0 0x0000 +#define PORT_BASED_PRIORITY_1 0x0008 +#define PORT_BASED_PRIORITY_2 0x0010 +#define PORT_BASED_PRIORITY_3 0x0018 +#define PORT_INSERT_TAG 0x0004 +#define PORT_REMOVE_TAG 0x0002 +#define PORT_PRIO_QUEUE_ENABLE 0x0001 + +#define KS8842_PORT_CTRL_2_OFFSET 0x02 + +#define PORT_INGRESS_VLAN_FILTER 0x4000 +#define PORT_DISCARD_NON_VID 0x2000 +#define PORT_FORCE_FLOW_CTRL 0x1000 +#define PORT_BACK_PRESSURE 0x0800 +#define PORT_TX_ENABLE 0x0400 +#define PORT_RX_ENABLE 0x0200 +#define PORT_LEARN_DISABLE 0x0100 +#define PORT_MIRROR_SNIFFER 0x0080 +#define PORT_MIRROR_RX 0x0040 +#define PORT_MIRROR_TX 0x0020 +#define PORT_USER_PRIORITY_CEILING 0x0008 +#define PORT_VLAN_MEMBERSHIP 0x0007 + +#define KS8842_PORT_CTRL_VID_OFFSET 0x04 + +#define PORT_DEFAULT_VID 0x0001 + +#define KS8842_PORT_CTRL_3_OFFSET 0x06 + +#define PORT_INGRESS_LIMIT_MODE 0x000C +#define PORT_INGRESS_ALL 0x0000 +#define PORT_INGRESS_UNICAST 0x0004 +#define PORT_INGRESS_MULTICAST 0x0008 +#define PORT_INGRESS_BROADCAST 0x000C +#define PORT_COUNT_IFG 0x0002 +#define PORT_COUNT_PREAMBLE 0x0001 + +#define KS8842_PORT_IN_RATE_OFFSET 0x08 +#define KS8842_PORT_OUT_RATE_OFFSET 0x0A + +#define PORT_PRIORITY_RATE 0x0F +#define PORT_PRIORITY_RATE_SHIFT 4 + +#define KS884X_PORT_LINK_MD 0x10 + +#define PORT_CABLE_10M_SHORT 0x8000 +#define PORT_CABLE_DIAG_RESULT 0x6000 +#define PORT_CABLE_STAT_NORMAL 0x0000 +#define PORT_CABLE_STAT_OPEN 0x2000 +#define PORT_CABLE_STAT_SHORT 0x4000 +#define PORT_CABLE_STAT_FAILED 0x6000 +#define PORT_START_CABLE_DIAG 0x1000 +#define PORT_FORCE_LINK 0x0800 +#define PORT_POWER_SAVING_DISABLE 0x0400 +#define PORT_PHY_REMOTE_LOOPBACK 0x0200 +#define PORT_CABLE_FAULT_COUNTER 0x01FF + +#define KS884X_PORT_CTRL_4_OFFSET 0x12 + +#define PORT_LED_OFF 0x8000 +#define PORT_TX_DISABLE 0x4000 +#define PORT_AUTO_NEG_RESTART 0x2000 +#define PORT_REMOTE_FAULT_DISABLE 0x1000 +#define PORT_POWER_DOWN 0x0800 +#define PORT_AUTO_MDIX_DISABLE 0x0400 +#define PORT_FORCE_MDIX 0x0200 +#define PORT_LOOPBACK 0x0100 +#define PORT_AUTO_NEG_ENABLE 0x0080 +#define PORT_FORCE_100_MBIT 0x0040 +#define PORT_FORCE_FULL_DUPLEX 0x0020 +#define PORT_AUTO_NEG_SYM_PAUSE 0x0010 +#define PORT_AUTO_NEG_100BTX_FD 0x0008 +#define PORT_AUTO_NEG_100BTX 0x0004 +#define PORT_AUTO_NEG_10BT_FD 0x0002 +#define PORT_AUTO_NEG_10BT 0x0001 + +#define KS884X_PORT_STATUS_OFFSET 0x14 + +#define PORT_HP_MDIX 0x8000 +#define PORT_REVERSED_POLARITY 0x2000 +#define PORT_RX_FLOW_CTRL 0x0800 +#define PORT_TX_FLOW_CTRL 0x1000 +#define PORT_STATUS_SPEED_100MBIT 0x0400 +#define PORT_STATUS_FULL_DUPLEX 0x0200 +#define PORT_REMOTE_FAULT 0x0100 +#define PORT_MDIX_STATUS 0x0080 +#define PORT_AUTO_NEG_COMPLETE 0x0040 +#define PORT_STATUS_LINK_GOOD 0x0020 +#define PORT_REMOTE_SYM_PAUSE 0x0010 +#define PORT_REMOTE_100BTX_FD 0x0008 +#define PORT_REMOTE_100BTX 0x0004 +#define PORT_REMOTE_10BT_FD 0x0002 +#define PORT_REMOTE_10BT 0x0001 + +/* +#define STATIC_MAC_TABLE_ADDR 00-0000FFFF-FFFFFFFF +#define STATIC_MAC_TABLE_FWD_PORTS 00-00070000-00000000 +#define STATIC_MAC_TABLE_VALID 00-00080000-00000000 +#define STATIC_MAC_TABLE_OVERRIDE 00-00100000-00000000 +#define STATIC_MAC_TABLE_USE_FID 00-00200000-00000000 +#define STATIC_MAC_TABLE_FID 00-03C00000-00000000 +*/ + +#define STATIC_MAC_TABLE_ADDR 0x0000FFFF +#define STATIC_MAC_TABLE_FWD_PORTS 0x00070000 +#define STATIC_MAC_TABLE_VALID 0x00080000 +#define STATIC_MAC_TABLE_OVERRIDE 0x00100000 +#define STATIC_MAC_TABLE_USE_FID 0x00200000 +#define STATIC_MAC_TABLE_FID 0x03C00000 + +#define STATIC_MAC_FWD_PORTS_SHIFT 16 +#define STATIC_MAC_FID_SHIFT 22 + +/* +#define VLAN_TABLE_VID 00-00000000-00000FFF +#define VLAN_TABLE_FID 00-00000000-0000F000 +#define VLAN_TABLE_MEMBERSHIP 00-00000000-00070000 +#define VLAN_TABLE_VALID 00-00000000-00080000 +*/ + +#define VLAN_TABLE_VID 0x00000FFF +#define VLAN_TABLE_FID 0x0000F000 +#define VLAN_TABLE_MEMBERSHIP 0x00070000 +#define VLAN_TABLE_VALID 0x00080000 + +#define VLAN_TABLE_FID_SHIFT 12 +#define VLAN_TABLE_MEMBERSHIP_SHIFT 16 + +/* +#define DYNAMIC_MAC_TABLE_ADDR 00-0000FFFF-FFFFFFFF +#define DYNAMIC_MAC_TABLE_FID 00-000F0000-00000000 +#define DYNAMIC_MAC_TABLE_SRC_PORT 00-00300000-00000000 +#define DYNAMIC_MAC_TABLE_TIMESTAMP 00-00C00000-00000000 +#define DYNAMIC_MAC_TABLE_ENTRIES 03-FF000000-00000000 +#define DYNAMIC_MAC_TABLE_MAC_EMPTY 04-00000000-00000000 +#define DYNAMIC_MAC_TABLE_RESERVED 78-00000000-00000000 +#define DYNAMIC_MAC_TABLE_NOT_READY 80-00000000-00000000 +*/ + +#define DYNAMIC_MAC_TABLE_ADDR 0x0000FFFF +#define DYNAMIC_MAC_TABLE_FID 0x000F0000 +#define DYNAMIC_MAC_TABLE_SRC_PORT 0x00300000 +#define DYNAMIC_MAC_TABLE_TIMESTAMP 0x00C00000 +#define DYNAMIC_MAC_TABLE_ENTRIES 0xFF000000 + +#define DYNAMIC_MAC_TABLE_ENTRIES_H 0x03 +#define DYNAMIC_MAC_TABLE_MAC_EMPTY 0x04 +#define DYNAMIC_MAC_TABLE_RESERVED 0x78 +#define DYNAMIC_MAC_TABLE_NOT_READY 0x80 + +#define DYNAMIC_MAC_FID_SHIFT 16 +#define DYNAMIC_MAC_SRC_PORT_SHIFT 20 +#define DYNAMIC_MAC_TIMESTAMP_SHIFT 22 +#define DYNAMIC_MAC_ENTRIES_SHIFT 24 +#define DYNAMIC_MAC_ENTRIES_H_SHIFT 8 + +/* +#define MIB_COUNTER_VALUE 00-00000000-3FFFFFFF +#define MIB_COUNTER_VALID 00-00000000-40000000 +#define MIB_COUNTER_OVERFLOW 00-00000000-80000000 +*/ + +#define MIB_COUNTER_VALUE 0x3FFFFFFF +#define MIB_COUNTER_VALID 0x40000000 +#define MIB_COUNTER_OVERFLOW 0x80000000 + +#define MIB_PACKET_DROPPED 0x0000FFFF + +#define KS_MIB_PACKET_DROPPED_TX_0 0x100 +#define KS_MIB_PACKET_DROPPED_TX_1 0x101 +#define KS_MIB_PACKET_DROPPED_TX 0x102 +#define KS_MIB_PACKET_DROPPED_RX_0 0x103 +#define KS_MIB_PACKET_DROPPED_RX_1 0x104 +#define KS_MIB_PACKET_DROPPED_RX 0x105 + +/* Change default LED mode. */ +#define SET_DEFAULT_LED LED_SPEED_DUPLEX_ACT + +#define MAC_ADDR_ORDER(i) (ETH_ALEN - 1 - (i)) + +#define MAX_ETHERNET_BODY_SIZE 1500 +#define ETHERNET_HEADER_SIZE (14 + VLAN_HLEN) + +#define MAX_ETHERNET_PACKET_SIZE \ + (MAX_ETHERNET_BODY_SIZE + ETHERNET_HEADER_SIZE) + +#define REGULAR_RX_BUF_SIZE (MAX_ETHERNET_PACKET_SIZE + 4) +#define MAX_RX_BUF_SIZE (1912 + 4) + +#define ADDITIONAL_ENTRIES 16 +#define MAX_MULTICAST_LIST 32 + +#define HW_MULTICAST_SIZE 8 + +#define HW_TO_DEV_PORT(port) (port - 1) + +enum { + media_connected, + media_disconnected +}; + +enum { + OID_COUNTER_UNKOWN, + + OID_COUNTER_FIRST, + + /* total transmit errors */ + OID_COUNTER_XMIT_ERROR, + + /* total receive errors */ + OID_COUNTER_RCV_ERROR, + + OID_COUNTER_LAST +}; + +/* + * Hardware descriptor definitions + */ + +#define DESC_ALIGNMENT 16 +#define BUFFER_ALIGNMENT 8 + +#define NUM_OF_RX_DESC 64 +#define NUM_OF_TX_DESC 64 + +#define KS_DESC_RX_FRAME_LEN 0x000007FF +#define KS_DESC_RX_FRAME_TYPE 0x00008000 +#define KS_DESC_RX_ERROR_CRC 0x00010000 +#define KS_DESC_RX_ERROR_RUNT 0x00020000 +#define KS_DESC_RX_ERROR_TOO_LONG 0x00040000 +#define KS_DESC_RX_ERROR_PHY 0x00080000 +#define KS884X_DESC_RX_PORT_MASK 0x00300000 +#define KS_DESC_RX_MULTICAST 0x01000000 +#define KS_DESC_RX_ERROR 0x02000000 +#define KS_DESC_RX_ERROR_CSUM_UDP 0x04000000 +#define KS_DESC_RX_ERROR_CSUM_TCP 0x08000000 +#define KS_DESC_RX_ERROR_CSUM_IP 0x10000000 +#define KS_DESC_RX_LAST 0x20000000 +#define KS_DESC_RX_FIRST 0x40000000 +#define KS_DESC_RX_ERROR_COND \ + (KS_DESC_RX_ERROR_CRC | \ + KS_DESC_RX_ERROR_RUNT | \ + KS_DESC_RX_ERROR_PHY | \ + KS_DESC_RX_ERROR_TOO_LONG) + +#define KS_DESC_HW_OWNED 0x80000000 + +#define KS_DESC_BUF_SIZE 0x000007FF +#define KS884X_DESC_TX_PORT_MASK 0x00300000 +#define KS_DESC_END_OF_RING 0x02000000 +#define KS_DESC_TX_CSUM_GEN_UDP 0x04000000 +#define KS_DESC_TX_CSUM_GEN_TCP 0x08000000 +#define KS_DESC_TX_CSUM_GEN_IP 0x10000000 +#define KS_DESC_TX_LAST 0x20000000 +#define KS_DESC_TX_FIRST 0x40000000 +#define KS_DESC_TX_INTERRUPT 0x80000000 + +#define KS_DESC_PORT_SHIFT 20 + +#define KS_DESC_RX_MASK (KS_DESC_BUF_SIZE) + +#define KS_DESC_TX_MASK \ + (KS_DESC_TX_INTERRUPT | \ + KS_DESC_TX_FIRST | \ + KS_DESC_TX_LAST | \ + KS_DESC_TX_CSUM_GEN_IP | \ + KS_DESC_TX_CSUM_GEN_TCP | \ + KS_DESC_TX_CSUM_GEN_UDP | \ + KS_DESC_BUF_SIZE) + +struct ksz_desc_rx_stat { +#ifdef __BIG_ENDIAN_BITFIELD + u32 hw_owned:1; + u32 first_desc:1; + u32 last_desc:1; + u32 csum_err_ip:1; + u32 csum_err_tcp:1; + u32 csum_err_udp:1; + u32 error:1; + u32 multicast:1; + u32 src_port:4; + u32 err_phy:1; + u32 err_too_long:1; + u32 err_runt:1; + u32 err_crc:1; + u32 frame_type:1; + u32 reserved1:4; + u32 frame_len:11; +#else + u32 frame_len:11; + u32 reserved1:4; + u32 frame_type:1; + u32 err_crc:1; + u32 err_runt:1; + u32 err_too_long:1; + u32 err_phy:1; + u32 src_port:4; + u32 multicast:1; + u32 error:1; + u32 csum_err_udp:1; + u32 csum_err_tcp:1; + u32 csum_err_ip:1; + u32 last_desc:1; + u32 first_desc:1; + u32 hw_owned:1; +#endif +}; + +struct ksz_desc_tx_stat { +#ifdef __BIG_ENDIAN_BITFIELD + u32 hw_owned:1; + u32 reserved1:31; +#else + u32 reserved1:31; + u32 hw_owned:1; +#endif +}; + +struct ksz_desc_rx_buf { +#ifdef __BIG_ENDIAN_BITFIELD + u32 reserved4:6; + u32 end_of_ring:1; + u32 reserved3:14; + u32 buf_size:11; +#else + u32 buf_size:11; + u32 reserved3:14; + u32 end_of_ring:1; + u32 reserved4:6; +#endif +}; + +struct ksz_desc_tx_buf { +#ifdef __BIG_ENDIAN_BITFIELD + u32 intr:1; + u32 first_seg:1; + u32 last_seg:1; + u32 csum_gen_ip:1; + u32 csum_gen_tcp:1; + u32 csum_gen_udp:1; + u32 end_of_ring:1; + u32 reserved4:1; + u32 dest_port:4; + u32 reserved3:9; + u32 buf_size:11; +#else + u32 buf_size:11; + u32 reserved3:9; + u32 dest_port:4; + u32 reserved4:1; + u32 end_of_ring:1; + u32 csum_gen_udp:1; + u32 csum_gen_tcp:1; + u32 csum_gen_ip:1; + u32 last_seg:1; + u32 first_seg:1; + u32 intr:1; +#endif +}; + +union desc_stat { + struct ksz_desc_rx_stat rx; + struct ksz_desc_tx_stat tx; + u32 data; +}; + +union desc_buf { + struct ksz_desc_rx_buf rx; + struct ksz_desc_tx_buf tx; + u32 data; +}; + +/** + * struct ksz_hw_desc - Hardware descriptor data structure + * @ctrl: Descriptor control value. + * @buf: Descriptor buffer value. + * @addr: Physical address of memory buffer. + * @next: Pointer to next hardware descriptor. + */ +struct ksz_hw_desc { + union desc_stat ctrl; + union desc_buf buf; + u32 addr; + u32 next; +}; + +/** + * struct ksz_sw_desc - Software descriptor data structure + * @ctrl: Descriptor control value. + * @buf: Descriptor buffer value. + * @buf_size: Current buffers size value in hardware descriptor. + */ +struct ksz_sw_desc { + union desc_stat ctrl; + union desc_buf buf; + u32 buf_size; +}; + +/** + * struct ksz_dma_buf - OS dependent DMA buffer data structure + * @skb: Associated socket buffer. + * @dma: Associated physical DMA address. + * len: Actual len used. + */ +struct ksz_dma_buf { + struct sk_buff *skb; + dma_addr_t dma; + int len; +}; + +/** + * struct ksz_desc - Descriptor structure + * @phw: Hardware descriptor pointer to uncached physical memory. + * @sw: Cached memory to hold hardware descriptor values for + * manipulation. + * @dma_buf: Operating system dependent data structure to hold physical + * memory buffer allocation information. + */ +struct ksz_desc { + struct ksz_hw_desc *phw; + struct ksz_sw_desc sw; + struct ksz_dma_buf dma_buf; +}; + +#define DMA_BUFFER(desc) ((struct ksz_dma_buf *)(&(desc)->dma_buf)) + +/** + * struct ksz_desc_info - Descriptor information data structure + * @ring: First descriptor in the ring. + * @cur: Current descriptor being manipulated. + * @ring_virt: First hardware descriptor in the ring. + * @ring_phys: The physical address of the first descriptor of the ring. + * @size: Size of hardware descriptor. + * @alloc: Number of descriptors allocated. + * @avail: Number of descriptors available for use. + * @last: Index for last descriptor released to hardware. + * @next: Index for next descriptor available for use. + * @mask: Mask for index wrapping. + */ +struct ksz_desc_info { + struct ksz_desc *ring; + struct ksz_desc *cur; + struct ksz_hw_desc *ring_virt; + u32 ring_phys; + int size; + int alloc; + int avail; + int last; + int next; + int mask; +}; + +/* + * KSZ8842 switch definitions + */ + +enum { + TABLE_STATIC_MAC = 0, + TABLE_VLAN, + TABLE_DYNAMIC_MAC, + TABLE_MIB +}; + +#define LEARNED_MAC_TABLE_ENTRIES 1024 +#define STATIC_MAC_TABLE_ENTRIES 8 + +/** + * struct ksz_mac_table - Static MAC table data structure + * @mac_addr: MAC address to filter. + * @vid: VID value. + * @fid: FID value. + * @ports: Port membership. + * @override: Override setting. + * @use_fid: FID use setting. + * @valid: Valid setting indicating the entry is being used. + */ +struct ksz_mac_table { + u8 mac_addr[ETH_ALEN]; + u16 vid; + u8 fid; + u8 ports; + u8 override:1; + u8 use_fid:1; + u8 valid:1; +}; + +#define VLAN_TABLE_ENTRIES 16 + +/** + * struct ksz_vlan_table - VLAN table data structure + * @vid: VID value. + * @fid: FID value. + * @member: Port membership. + */ +struct ksz_vlan_table { + u16 vid; + u8 fid; + u8 member; +}; + +#define DIFFSERV_ENTRIES 64 +#define PRIO_802_1P_ENTRIES 8 +#define PRIO_QUEUES 4 + +#define SWITCH_PORT_NUM 2 +#define TOTAL_PORT_NUM (SWITCH_PORT_NUM + 1) +#define HOST_MASK (1 << SWITCH_PORT_NUM) +#define PORT_MASK 7 + +#define MAIN_PORT 0 +#define OTHER_PORT 1 +#define HOST_PORT SWITCH_PORT_NUM + +#define PORT_COUNTER_NUM 0x20 +#define TOTAL_PORT_COUNTER_NUM (PORT_COUNTER_NUM + 2) + +#define MIB_COUNTER_RX_LO_PRIORITY 0x00 +#define MIB_COUNTER_RX_HI_PRIORITY 0x01 +#define MIB_COUNTER_RX_UNDERSIZE 0x02 +#define MIB_COUNTER_RX_FRAGMENT 0x03 +#define MIB_COUNTER_RX_OVERSIZE 0x04 +#define MIB_COUNTER_RX_JABBER 0x05 +#define MIB_COUNTER_RX_SYMBOL_ERR 0x06 +#define MIB_COUNTER_RX_CRC_ERR 0x07 +#define MIB_COUNTER_RX_ALIGNMENT_ERR 0x08 +#define MIB_COUNTER_RX_CTRL_8808 0x09 +#define MIB_COUNTER_RX_PAUSE 0x0A +#define MIB_COUNTER_RX_BROADCAST 0x0B +#define MIB_COUNTER_RX_MULTICAST 0x0C +#define MIB_COUNTER_RX_UNICAST 0x0D +#define MIB_COUNTER_RX_OCTET_64 0x0E +#define MIB_COUNTER_RX_OCTET_65_127 0x0F +#define MIB_COUNTER_RX_OCTET_128_255 0x10 +#define MIB_COUNTER_RX_OCTET_256_511 0x11 +#define MIB_COUNTER_RX_OCTET_512_1023 0x12 +#define MIB_COUNTER_RX_OCTET_1024_1522 0x13 +#define MIB_COUNTER_TX_LO_PRIORITY 0x14 +#define MIB_COUNTER_TX_HI_PRIORITY 0x15 +#define MIB_COUNTER_TX_LATE_COLLISION 0x16 +#define MIB_COUNTER_TX_PAUSE 0x17 +#define MIB_COUNTER_TX_BROADCAST 0x18 +#define MIB_COUNTER_TX_MULTICAST 0x19 +#define MIB_COUNTER_TX_UNICAST 0x1A +#define MIB_COUNTER_TX_DEFERRED 0x1B +#define MIB_COUNTER_TX_TOTAL_COLLISION 0x1C +#define MIB_COUNTER_TX_EXCESS_COLLISION 0x1D +#define MIB_COUNTER_TX_SINGLE_COLLISION 0x1E +#define MIB_COUNTER_TX_MULTI_COLLISION 0x1F + +#define MIB_COUNTER_RX_DROPPED_PACKET 0x20 +#define MIB_COUNTER_TX_DROPPED_PACKET 0x21 + +/** + * struct ksz_port_mib - Port MIB data structure + * @cnt_ptr: Current pointer to MIB counter index. + * @link_down: Indication the link has just gone down. + * @state: Connection status of the port. + * @mib_start: The starting counter index. Some ports do not start at 0. + * @counter: 64-bit MIB counter value. + * @dropped: Temporary buffer to remember last read packet dropped values. + * + * MIB counters needs to be read periodically so that counters do not get + * overflowed and give incorrect values. A right balance is needed to + * satisfy this condition and not waste too much CPU time. + * + * It is pointless to read MIB counters when the port is disconnected. The + * @state provides the connection status so that MIB counters are read only + * when the port is connected. The @link_down indicates the port is just + * disconnected so that all MIB counters are read one last time to update the + * information. + */ +struct ksz_port_mib { + u8 cnt_ptr; + u8 link_down; + u8 state; + u8 mib_start; + + u64 counter[TOTAL_PORT_COUNTER_NUM]; + u32 dropped[2]; +}; + +/** + * struct ksz_port_cfg - Port configuration data structure + * @vid: VID value. + * @member: Port membership. + * @port_prio: Port priority. + * @rx_rate: Receive priority rate. + * @tx_rate: Transmit priority rate. + * @stp_state: Current Spanning Tree Protocol state. + */ +struct ksz_port_cfg { + u16 vid; + u8 member; + u8 port_prio; + u32 rx_rate[PRIO_QUEUES]; + u32 tx_rate[PRIO_QUEUES]; + int stp_state; +}; + +/** + * struct ksz_switch - KSZ8842 switch data structure + * @mac_table: MAC table entries information. + * @vlan_table: VLAN table entries information. + * @port_cfg: Port configuration information. + * @diffserv: DiffServ priority settings. Possible values from 6-bit of ToS + * (bit7 ~ bit2) field. + * @p_802_1p: 802.1P priority settings. Possible values from 3-bit of 802.1p + * Tag priority field. + * @br_addr: Bridge address. Used for STP. + * @other_addr: Other MAC address. Used for multiple network device mode. + * @broad_per: Broadcast storm percentage. + * @member: Current port membership. Used for STP. + */ +struct ksz_switch { + struct ksz_mac_table mac_table[STATIC_MAC_TABLE_ENTRIES]; + struct ksz_vlan_table vlan_table[VLAN_TABLE_ENTRIES]; + struct ksz_port_cfg port_cfg[TOTAL_PORT_NUM]; + + u8 diffserv[DIFFSERV_ENTRIES]; + u8 p_802_1p[PRIO_802_1P_ENTRIES]; + + u8 br_addr[ETH_ALEN]; + u8 other_addr[ETH_ALEN]; + + u8 broad_per; + u8 member; +}; + +#define TX_RATE_UNIT 10000 + +/** + * struct ksz_port_info - Port information data structure + * @state: Connection status of the port. + * @tx_rate: Transmit rate divided by 10000 to get Mbit. + * @duplex: Duplex mode. + * @advertised: Advertised auto-negotiation setting. Used to determine link. + * @partner: Auto-negotiation partner setting. Used to determine link. + * @port_id: Port index to access actual hardware register. + * @pdev: Pointer to OS dependent network device. + */ +struct ksz_port_info { + uint state; + uint tx_rate; + u8 duplex; + u8 advertised; + u8 partner; + u8 port_id; + void *pdev; +}; + +#define MAX_TX_HELD_SIZE 52000 + +/* Hardware features and bug fixes. */ +#define LINK_INT_WORKING (1 << 0) +#define SMALL_PACKET_TX_BUG (1 << 1) +#define HALF_DUPLEX_SIGNAL_BUG (1 << 2) +#define RX_HUGE_FRAME (1 << 4) +#define STP_SUPPORT (1 << 8) + +/* Software overrides. */ +#define PAUSE_FLOW_CTRL (1 << 0) +#define FAST_AGING (1 << 1) + +/** + * struct ksz_hw - KSZ884X hardware data structure + * @io: Virtual address assigned. + * @ksz_switch: Pointer to KSZ8842 switch. + * @port_info: Port information. + * @port_mib: Port MIB information. + * @dev_count: Number of network devices this hardware supports. + * @dst_ports: Destination ports in switch for transmission. + * @id: Hardware ID. Used for display only. + * @mib_cnt: Number of MIB counters this hardware has. + * @mib_port_cnt: Number of ports with MIB counters. + * @tx_cfg: Cached transmit control settings. + * @rx_cfg: Cached receive control settings. + * @intr_mask: Current interrupt mask. + * @intr_set: Current interrup set. + * @intr_blocked: Interrupt blocked. + * @rx_desc_info: Receive descriptor information. + * @tx_desc_info: Transmit descriptor information. + * @tx_int_cnt: Transmit interrupt count. Used for TX optimization. + * @tx_int_mask: Transmit interrupt mask. Used for TX optimization. + * @tx_size: Transmit data size. Used for TX optimization. + * The maximum is defined by MAX_TX_HELD_SIZE. + * @perm_addr: Permanent MAC address. + * @override_addr: Overrided MAC address. + * @address: Additional MAC address entries. + * @addr_list_size: Additional MAC address list size. + * @mac_override: Indication of MAC address overrided. + * @promiscuous: Counter to keep track of promiscuous mode set. + * @all_multi: Counter to keep track of all multicast mode set. + * @multi_list: Multicast address entries. + * @multi_bits: Cached multicast hash table settings. + * @multi_list_size: Multicast address list size. + * @enabled: Indication of hardware enabled. + * @rx_stop: Indication of receive process stop. + * @features: Hardware features to enable. + * @overrides: Hardware features to override. + * @parent: Pointer to parent, network device private structure. + */ +struct ksz_hw { + void __iomem *io; + + struct ksz_switch *ksz_switch; + struct ksz_port_info port_info[SWITCH_PORT_NUM]; + struct ksz_port_mib port_mib[TOTAL_PORT_NUM]; + int dev_count; + int dst_ports; + int id; + int mib_cnt; + int mib_port_cnt; + + u32 tx_cfg; + u32 rx_cfg; + u32 intr_mask; + u32 intr_set; + uint intr_blocked; + + struct ksz_desc_info rx_desc_info; + struct ksz_desc_info tx_desc_info; + + int tx_int_cnt; + int tx_int_mask; + int tx_size; + + u8 perm_addr[ETH_ALEN]; + u8 override_addr[ETH_ALEN]; + u8 address[ADDITIONAL_ENTRIES][ETH_ALEN]; + u8 addr_list_size; + u8 mac_override; + u8 promiscuous; + u8 all_multi; + u8 multi_list[MAX_MULTICAST_LIST][ETH_ALEN]; + u8 multi_bits[HW_MULTICAST_SIZE]; + u8 multi_list_size; + + u8 enabled; + u8 rx_stop; + u8 reserved2[1]; + + uint features; + uint overrides; + + void *parent; +}; + +enum { + PHY_NO_FLOW_CTRL, + PHY_FLOW_CTRL, + PHY_TX_ONLY, + PHY_RX_ONLY +}; + +/** + * struct ksz_port - Virtual port data structure + * @duplex: Duplex mode setting. 1 for half duplex, 2 for full + * duplex, and 0 for auto, which normally results in full + * duplex. + * @speed: Speed setting. 10 for 10 Mbit, 100 for 100 Mbit, and + * 0 for auto, which normally results in 100 Mbit. + * @force_link: Force link setting. 0 for auto-negotiation, and 1 for + * force. + * @flow_ctrl: Flow control setting. PHY_NO_FLOW_CTRL for no flow + * control, and PHY_FLOW_CTRL for flow control. + * PHY_TX_ONLY and PHY_RX_ONLY are not supported for 100 + * Mbit PHY. + * @first_port: Index of first port this port supports. + * @mib_port_cnt: Number of ports with MIB counters. + * @port_cnt: Number of ports this port supports. + * @counter: Port statistics counter. + * @hw: Pointer to hardware structure. + * @linked: Pointer to port information linked to this port. + */ +struct ksz_port { + u8 duplex; + u8 speed; + u8 force_link; + u8 flow_ctrl; + + int first_port; + int mib_port_cnt; + int port_cnt; + u64 counter[OID_COUNTER_LAST]; + + struct ksz_hw *hw; + struct ksz_port_info *linked; +}; + +/** + * struct ksz_timer_info - Timer information data structure + * @timer: Kernel timer. + * @cnt: Running timer counter. + * @max: Number of times to run timer; -1 for infinity. + * @period: Timer period in jiffies. + */ +struct ksz_timer_info { + struct timer_list timer; + int cnt; + int max; + int period; +}; + +/** + * struct ksz_shared_mem - OS dependent shared memory data structure + * @dma_addr: Physical DMA address allocated. + * @alloc_size: Allocation size. + * @phys: Actual physical address used. + * @alloc_virt: Virtual address allocated. + * @virt: Actual virtual address used. + */ +struct ksz_shared_mem { + dma_addr_t dma_addr; + uint alloc_size; + uint phys; + u8 *alloc_virt; + u8 *virt; +}; + +/** + * struct ksz_counter_info - OS dependent counter information data structure + * @counter: Wait queue to wakeup after counters are read. + * @time: Next time in jiffies to read counter. + * @read: Indication of counters read in full or not. + */ +struct ksz_counter_info { + wait_queue_head_t counter; + unsigned long time; + int read; +}; + +/** + * struct dev_info - Network device information data structure + * @dev: Pointer to network device. + * @pdev: Pointer to PCI device. + * @hw: Hardware structure. + * @desc_pool: Physical memory used for descriptor pool. + * @hwlock: Spinlock to prevent hardware from accessing. + * @lock: Mutex lock to prevent device from accessing. + * @dev_rcv: Receive process function used. + * @last_skb: Socket buffer allocated for descriptor rx fragments. + * @skb_index: Buffer index for receiving fragments. + * @skb_len: Buffer length for receiving fragments. + * @mib_read: Workqueue to read MIB counters. + * @mib_timer_info: Timer to read MIB counters. + * @counter: Used for MIB reading. + * @mtu: Current MTU used. The default is REGULAR_RX_BUF_SIZE; + * the maximum is MAX_RX_BUF_SIZE. + * @opened: Counter to keep track of device open. + * @rx_tasklet: Receive processing tasklet. + * @tx_tasklet: Transmit processing tasklet. + * @wol_enable: Wake-on-LAN enable set by ethtool. + * @wol_support: Wake-on-LAN support used by ethtool. + * @pme_wait: Used for KSZ8841 power management. + */ +struct dev_info { + struct net_device *dev; + struct pci_dev *pdev; + + struct ksz_hw hw; + struct ksz_shared_mem desc_pool; + + spinlock_t hwlock; + struct mutex lock; + + int (*dev_rcv)(struct dev_info *); + + struct sk_buff *last_skb; + int skb_index; + int skb_len; + + struct work_struct mib_read; + struct ksz_timer_info mib_timer_info; + struct ksz_counter_info counter[TOTAL_PORT_NUM]; + + int mtu; + int opened; + + struct tasklet_struct rx_tasklet; + struct tasklet_struct tx_tasklet; + + int wol_enable; + int wol_support; + unsigned long pme_wait; +}; + +/** + * struct dev_priv - Network device private data structure + * @adapter: Adapter device information. + * @port: Port information. + * @monitor_time_info: Timer to monitor ports. + * @proc_sem: Semaphore for proc accessing. + * @id: Device ID. + * @mii_if: MII interface information. + * @advertising: Temporary variable to store advertised settings. + * @msg_enable: The message flags controlling driver output. + * @media_state: The connection status of the device. + * @multicast: The all multicast state of the device. + * @promiscuous: The promiscuous state of the device. + */ +struct dev_priv { + struct dev_info *adapter; + struct ksz_port port; + struct ksz_timer_info monitor_timer_info; + + struct semaphore proc_sem; + int id; + + struct mii_if_info mii_if; + u32 advertising; + + u32 msg_enable; + int media_state; + int multicast; + int promiscuous; +}; + +#define DRV_NAME "KSZ884X PCI" +#define DEVICE_NAME "KSZ884x PCI" +#define DRV_VERSION "1.0.0" +#define DRV_RELDATE "Feb 8, 2010" + +static char version[] = + "Micrel " DEVICE_NAME " " DRV_VERSION " (" DRV_RELDATE ")"; + +static u8 DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x88, 0x42, 0x01 }; + +/* + * Interrupt processing primary routines + */ + +static inline void hw_ack_intr(struct ksz_hw *hw, uint interrupt) +{ + writel(interrupt, hw->io + KS884X_INTERRUPTS_STATUS); +} + +static inline void hw_dis_intr(struct ksz_hw *hw) +{ + hw->intr_blocked = hw->intr_mask; + writel(0, hw->io + KS884X_INTERRUPTS_ENABLE); + hw->intr_set = readl(hw->io + KS884X_INTERRUPTS_ENABLE); +} + +static inline void hw_set_intr(struct ksz_hw *hw, uint interrupt) +{ + hw->intr_set = interrupt; + writel(interrupt, hw->io + KS884X_INTERRUPTS_ENABLE); +} + +static inline void hw_ena_intr(struct ksz_hw *hw) +{ + hw->intr_blocked = 0; + hw_set_intr(hw, hw->intr_mask); +} + +static inline void hw_dis_intr_bit(struct ksz_hw *hw, uint bit) +{ + hw->intr_mask &= ~(bit); +} + +static inline void hw_turn_off_intr(struct ksz_hw *hw, uint interrupt) +{ + u32 read_intr; + + read_intr = readl(hw->io + KS884X_INTERRUPTS_ENABLE); + hw->intr_set = read_intr & ~interrupt; + writel(hw->intr_set, hw->io + KS884X_INTERRUPTS_ENABLE); + hw_dis_intr_bit(hw, interrupt); +} + +/** + * hw_turn_on_intr - turn on specified interrupts + * @hw: The hardware instance. + * @bit: The interrupt bits to be on. + * + * This routine turns on the specified interrupts in the interrupt mask so that + * those interrupts will be enabled. + */ +static void hw_turn_on_intr(struct ksz_hw *hw, u32 bit) +{ + hw->intr_mask |= bit; + + if (!hw->intr_blocked) + hw_set_intr(hw, hw->intr_mask); +} + +static inline void hw_ena_intr_bit(struct ksz_hw *hw, uint interrupt) +{ + u32 read_intr; + + read_intr = readl(hw->io + KS884X_INTERRUPTS_ENABLE); + hw->intr_set = read_intr | interrupt; + writel(hw->intr_set, hw->io + KS884X_INTERRUPTS_ENABLE); +} + +static inline void hw_read_intr(struct ksz_hw *hw, uint *status) +{ + *status = readl(hw->io + KS884X_INTERRUPTS_STATUS); + *status = *status & hw->intr_set; +} + +static inline void hw_restore_intr(struct ksz_hw *hw, uint interrupt) +{ + if (interrupt) + hw_ena_intr(hw); +} + +/** + * hw_block_intr - block hardware interrupts + * + * This function blocks all interrupts of the hardware and returns the current + * interrupt enable mask so that interrupts can be restored later. + * + * Return the current interrupt enable mask. + */ +static uint hw_block_intr(struct ksz_hw *hw) +{ + uint interrupt = 0; + + if (!hw->intr_blocked) { + hw_dis_intr(hw); + interrupt = hw->intr_blocked; + } + return interrupt; +} + +/* + * Hardware descriptor routines + */ + +static inline void reset_desc(struct ksz_desc *desc, union desc_stat status) +{ + status.rx.hw_owned = 0; + desc->phw->ctrl.data = cpu_to_le32(status.data); +} + +static inline void release_desc(struct ksz_desc *desc) +{ + desc->sw.ctrl.tx.hw_owned = 1; + if (desc->sw.buf_size != desc->sw.buf.data) { + desc->sw.buf_size = desc->sw.buf.data; + desc->phw->buf.data = cpu_to_le32(desc->sw.buf.data); + } + desc->phw->ctrl.data = cpu_to_le32(desc->sw.ctrl.data); +} + +static void get_rx_pkt(struct ksz_desc_info *info, struct ksz_desc **desc) +{ + *desc = &info->ring[info->last]; + info->last++; + info->last &= info->mask; + info->avail--; + (*desc)->sw.buf.data &= ~KS_DESC_RX_MASK; +} + +static inline void set_rx_buf(struct ksz_desc *desc, u32 addr) +{ + desc->phw->addr = cpu_to_le32(addr); +} + +static inline void set_rx_len(struct ksz_desc *desc, u32 len) +{ + desc->sw.buf.rx.buf_size = len; +} + +static inline void get_tx_pkt(struct ksz_desc_info *info, + struct ksz_desc **desc) +{ + *desc = &info->ring[info->next]; + info->next++; + info->next &= info->mask; + info->avail--; + (*desc)->sw.buf.data &= ~KS_DESC_TX_MASK; +} + +static inline void set_tx_buf(struct ksz_desc *desc, u32 addr) +{ + desc->phw->addr = cpu_to_le32(addr); +} + +static inline void set_tx_len(struct ksz_desc *desc, u32 len) +{ + desc->sw.buf.tx.buf_size = len; +} + +/* Switch functions */ + +#define TABLE_READ 0x10 +#define TABLE_SEL_SHIFT 2 + +#define HW_DELAY(hw, reg) \ + do { \ + u16 dummy; \ + dummy = readw(hw->io + reg); \ + } while (0) + +/** + * sw_r_table - read 4 bytes of data from switch table + * @hw: The hardware instance. + * @table: The table selector. + * @addr: The address of the table entry. + * @data: Buffer to store the read data. + * + * This routine reads 4 bytes of data from the table of the switch. + * Hardware interrupts are disabled to minimize corruption of read data. + */ +static void sw_r_table(struct ksz_hw *hw, int table, u16 addr, u32 *data) +{ + u16 ctrl_addr; + uint interrupt; + + ctrl_addr = (((table << TABLE_SEL_SHIFT) | TABLE_READ) << 8) | addr; + + interrupt = hw_block_intr(hw); + + writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET); + HW_DELAY(hw, KS884X_IACR_OFFSET); + *data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET); + + hw_restore_intr(hw, interrupt); +} + +/** + * sw_w_table_64 - write 8 bytes of data to the switch table + * @hw: The hardware instance. + * @table: The table selector. + * @addr: The address of the table entry. + * @data_hi: The high part of data to be written (bit63 ~ bit32). + * @data_lo: The low part of data to be written (bit31 ~ bit0). + * + * This routine writes 8 bytes of data to the table of the switch. + * Hardware interrupts are disabled to minimize corruption of written data. + */ +static void sw_w_table_64(struct ksz_hw *hw, int table, u16 addr, u32 data_hi, + u32 data_lo) +{ + u16 ctrl_addr; + uint interrupt; + + ctrl_addr = ((table << TABLE_SEL_SHIFT) << 8) | addr; + + interrupt = hw_block_intr(hw); + + writel(data_hi, hw->io + KS884X_ACC_DATA_4_OFFSET); + writel(data_lo, hw->io + KS884X_ACC_DATA_0_OFFSET); + + writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET); + HW_DELAY(hw, KS884X_IACR_OFFSET); + + hw_restore_intr(hw, interrupt); +} + +/** + * sw_w_sta_mac_table - write to the static MAC table + * @hw: The hardware instance. + * @addr: The address of the table entry. + * @mac_addr: The MAC address. + * @ports: The port members. + * @override: The flag to override the port receive/transmit settings. + * @valid: The flag to indicate entry is valid. + * @use_fid: The flag to indicate the FID is valid. + * @fid: The FID value. + * + * This routine writes an entry of the static MAC table of the switch. It + * calls sw_w_table_64() to write the data. + */ +static void sw_w_sta_mac_table(struct ksz_hw *hw, u16 addr, u8 *mac_addr, + u8 ports, int override, int valid, int use_fid, u8 fid) +{ + u32 data_hi; + u32 data_lo; + + data_lo = ((u32) mac_addr[2] << 24) | + ((u32) mac_addr[3] << 16) | + ((u32) mac_addr[4] << 8) | mac_addr[5]; + data_hi = ((u32) mac_addr[0] << 8) | mac_addr[1]; + data_hi |= (u32) ports << STATIC_MAC_FWD_PORTS_SHIFT; + + if (override) + data_hi |= STATIC_MAC_TABLE_OVERRIDE; + if (use_fid) { + data_hi |= STATIC_MAC_TABLE_USE_FID; + data_hi |= (u32) fid << STATIC_MAC_FID_SHIFT; + } + if (valid) + data_hi |= STATIC_MAC_TABLE_VALID; + + sw_w_table_64(hw, TABLE_STATIC_MAC, addr, data_hi, data_lo); +} + +/** + * sw_r_vlan_table - read from the VLAN table + * @hw: The hardware instance. + * @addr: The address of the table entry. + * @vid: Buffer to store the VID. + * @fid: Buffer to store the VID. + * @member: Buffer to store the port membership. + * + * This function reads an entry of the VLAN table of the switch. It calls + * sw_r_table() to get the data. + * + * Return 0 if the entry is valid; otherwise -1. + */ +static int sw_r_vlan_table(struct ksz_hw *hw, u16 addr, u16 *vid, u8 *fid, + u8 *member) +{ + u32 data; + + sw_r_table(hw, TABLE_VLAN, addr, &data); + if (data & VLAN_TABLE_VALID) { + *vid = (u16)(data & VLAN_TABLE_VID); + *fid = (u8)((data & VLAN_TABLE_FID) >> VLAN_TABLE_FID_SHIFT); + *member = (u8)((data & VLAN_TABLE_MEMBERSHIP) >> + VLAN_TABLE_MEMBERSHIP_SHIFT); + return 0; + } + return -1; +} + +/** + * port_r_mib_cnt - read MIB counter + * @hw: The hardware instance. + * @port: The port index. + * @addr: The address of the counter. + * @cnt: Buffer to store the counter. + * + * This routine reads a MIB counter of the port. + * Hardware interrupts are disabled to minimize corruption of read data. + */ +static void port_r_mib_cnt(struct ksz_hw *hw, int port, u16 addr, u64 *cnt) +{ + u32 data; + u16 ctrl_addr; + uint interrupt; + int timeout; + + ctrl_addr = addr + PORT_COUNTER_NUM * port; + + interrupt = hw_block_intr(hw); + + ctrl_addr |= (((TABLE_MIB << TABLE_SEL_SHIFT) | TABLE_READ) << 8); + writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET); + HW_DELAY(hw, KS884X_IACR_OFFSET); + + for (timeout = 100; timeout > 0; timeout--) { + data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET); + + if (data & MIB_COUNTER_VALID) { + if (data & MIB_COUNTER_OVERFLOW) + *cnt += MIB_COUNTER_VALUE + 1; + *cnt += data & MIB_COUNTER_VALUE; + break; + } + } + + hw_restore_intr(hw, interrupt); +} + +/** + * port_r_mib_pkt - read dropped packet counts + * @hw: The hardware instance. + * @port: The port index. + * @cnt: Buffer to store the receive and transmit dropped packet counts. + * + * This routine reads the dropped packet counts of the port. + * Hardware interrupts are disabled to minimize corruption of read data. + */ +static void port_r_mib_pkt(struct ksz_hw *hw, int port, u32 *last, u64 *cnt) +{ + u32 cur; + u32 data; + u16 ctrl_addr; + uint interrupt; + int index; + + index = KS_MIB_PACKET_DROPPED_RX_0 + port; + do { + interrupt = hw_block_intr(hw); + + ctrl_addr = (u16) index; + ctrl_addr |= (((TABLE_MIB << TABLE_SEL_SHIFT) | TABLE_READ) + << 8); + writew(ctrl_addr, hw->io + KS884X_IACR_OFFSET); + HW_DELAY(hw, KS884X_IACR_OFFSET); + data = readl(hw->io + KS884X_ACC_DATA_0_OFFSET); + + hw_restore_intr(hw, interrupt); + + data &= MIB_PACKET_DROPPED; + cur = *last; + if (data != cur) { + *last = data; + if (data < cur) + data += MIB_PACKET_DROPPED + 1; + data -= cur; + *cnt += data; + } + ++last; + ++cnt; + index -= KS_MIB_PACKET_DROPPED_TX - + KS_MIB_PACKET_DROPPED_TX_0 + 1; + } while (index >= KS_MIB_PACKET_DROPPED_TX_0 + port); +} + +/** + * port_r_cnt - read MIB counters periodically + * @hw: The hardware instance. + * @port: The port index. + * + * This routine is used to read the counters of the port periodically to avoid + * counter overflow. The hardware should be acquired first before calling this + * routine. + * + * Return non-zero when not all counters not read. + */ +static int port_r_cnt(struct ksz_hw *hw, int port) +{ + struct ksz_port_mib *mib = &hw->port_mib[port]; + + if (mib->mib_start < PORT_COUNTER_NUM) + while (mib->cnt_ptr < PORT_COUNTER_NUM) { + port_r_mib_cnt(hw, port, mib->cnt_ptr, + &mib->counter[mib->cnt_ptr]); + ++mib->cnt_ptr; + } + if (hw->mib_cnt > PORT_COUNTER_NUM) + port_r_mib_pkt(hw, port, mib->dropped, + &mib->counter[PORT_COUNTER_NUM]); + mib->cnt_ptr = 0; + return 0; +} + +/** + * port_init_cnt - initialize MIB counter values + * @hw: The hardware instance. + * @port: The port index. + * + * This routine is used to initialize all counters to zero if the hardware + * cannot do it after reset. + */ +static void port_init_cnt(struct ksz_hw *hw, int port) +{ + struct ksz_port_mib *mib = &hw->port_mib[port]; + + mib->cnt_ptr = 0; + if (mib->mib_start < PORT_COUNTER_NUM) + do { + port_r_mib_cnt(hw, port, mib->cnt_ptr, + &mib->counter[mib->cnt_ptr]); + ++mib->cnt_ptr; + } while (mib->cnt_ptr < PORT_COUNTER_NUM); + if (hw->mib_cnt > PORT_COUNTER_NUM) + port_r_mib_pkt(hw, port, mib->dropped, + &mib->counter[PORT_COUNTER_NUM]); + memset((void *) mib->counter, 0, sizeof(u64) * TOTAL_PORT_COUNTER_NUM); + mib->cnt_ptr = 0; +} + +/* + * Port functions + */ + +/** + * port_chk - check port register bits + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the port register. + * @bits: The data bits to check. + * + * This function checks whether the specified bits of the port register are set + * or not. + * + * Return 0 if the bits are not set. + */ +static int port_chk(struct ksz_hw *hw, int port, int offset, u16 bits) +{ + u32 addr; + u16 data; + + PORT_CTRL_ADDR(port, addr); + addr += offset; + data = readw(hw->io + addr); + return (data & bits) == bits; +} + +/** + * port_cfg - set port register bits + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the port register. + * @bits: The data bits to set. + * @set: The flag indicating whether the bits are to be set or not. + * + * This routine sets or resets the specified bits of the port register. + */ +static void port_cfg(struct ksz_hw *hw, int port, int offset, u16 bits, + int set) +{ + u32 addr; + u16 data; + + PORT_CTRL_ADDR(port, addr); + addr += offset; + data = readw(hw->io + addr); + if (set) + data |= bits; + else + data &= ~bits; + writew(data, hw->io + addr); +} + +/** + * port_chk_shift - check port bit + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the register. + * @shift: Number of bits to shift. + * + * This function checks whether the specified port is set in the register or + * not. + * + * Return 0 if the port is not set. + */ +static int port_chk_shift(struct ksz_hw *hw, int port, u32 addr, int shift) +{ + u16 data; + u16 bit = 1 << port; + + data = readw(hw->io + addr); + data >>= shift; + return (data & bit) == bit; +} + +/** + * port_cfg_shift - set port bit + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the register. + * @shift: Number of bits to shift. + * @set: The flag indicating whether the port is to be set or not. + * + * This routine sets or resets the specified port in the register. + */ +static void port_cfg_shift(struct ksz_hw *hw, int port, u32 addr, int shift, + int set) +{ + u16 data; + u16 bits = 1 << port; + + data = readw(hw->io + addr); + bits <<= shift; + if (set) + data |= bits; + else + data &= ~bits; + writew(data, hw->io + addr); +} + +/** + * port_r8 - read byte from port register + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the port register. + * @data: Buffer to store the data. + * + * This routine reads a byte from the port register. + */ +static void port_r8(struct ksz_hw *hw, int port, int offset, u8 *data) +{ + u32 addr; + + PORT_CTRL_ADDR(port, addr); + addr += offset; + *data = readb(hw->io + addr); +} + +/** + * port_r16 - read word from port register. + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the port register. + * @data: Buffer to store the data. + * + * This routine reads a word from the port register. + */ +static void port_r16(struct ksz_hw *hw, int port, int offset, u16 *data) +{ + u32 addr; + + PORT_CTRL_ADDR(port, addr); + addr += offset; + *data = readw(hw->io + addr); +} + +/** + * port_w16 - write word to port register. + * @hw: The hardware instance. + * @port: The port index. + * @offset: The offset of the port register. + * @data: Data to write. + * + * This routine writes a word to the port register. + */ +static void port_w16(struct ksz_hw *hw, int port, int offset, u16 data) +{ + u32 addr; + + PORT_CTRL_ADDR(port, addr); + addr += offset; + writew(data, hw->io + addr); +} + +/** + * sw_chk - check switch register bits + * @hw: The hardware instance. + * @addr: The address of the switch register. + * @bits: The data bits to check. + * + * This function checks whether the specified bits of the switch register are + * set or not. + * + * Return 0 if the bits are not set. + */ +static int sw_chk(struct ksz_hw *hw, u32 addr, u16 bits) +{ + u16 data; + + data = readw(hw->io + addr); + return (data & bits) == bits; +} + +/** + * sw_cfg - set switch register bits + * @hw: The hardware instance. + * @addr: The address of the switch register. + * @bits: The data bits to set. + * @set: The flag indicating whether the bits are to be set or not. + * + * This function sets or resets the specified bits of the switch register. + */ +static void sw_cfg(struct ksz_hw *hw, u32 addr, u16 bits, int set) +{ + u16 data; + + data = readw(hw->io + addr); + if (set) + data |= bits; + else + data &= ~bits; + writew(data, hw->io + addr); +} + +/* Bandwidth */ + +static inline void port_cfg_broad_storm(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_BROADCAST_STORM, set); +} + +static inline int port_chk_broad_storm(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_BROADCAST_STORM); +} + +/* Driver set switch broadcast storm protection at 10% rate. */ +#define BROADCAST_STORM_PROTECTION_RATE 10 + +/* 148,800 frames * 67 ms / 100 */ +#define BROADCAST_STORM_VALUE 9969 + +/** + * sw_cfg_broad_storm - configure broadcast storm threshold + * @hw: The hardware instance. + * @percent: Broadcast storm threshold in percent of transmit rate. + * + * This routine configures the broadcast storm threshold of the switch. + */ +static void sw_cfg_broad_storm(struct ksz_hw *hw, u8 percent) +{ + u16 data; + u32 value = ((u32) BROADCAST_STORM_VALUE * (u32) percent / 100); + + if (value > BROADCAST_STORM_RATE) + value = BROADCAST_STORM_RATE; + + data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET); + data &= ~(BROADCAST_STORM_RATE_LO | BROADCAST_STORM_RATE_HI); + data |= ((value & 0x00FF) << 8) | ((value & 0xFF00) >> 8); + writew(data, hw->io + KS8842_SWITCH_CTRL_3_OFFSET); +} + +/** + * sw_get_board_storm - get broadcast storm threshold + * @hw: The hardware instance. + * @percent: Buffer to store the broadcast storm threshold percentage. + * + * This routine retrieves the broadcast storm threshold of the switch. + */ +static void sw_get_broad_storm(struct ksz_hw *hw, u8 *percent) +{ + int num; + u16 data; + + data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET); + num = (data & BROADCAST_STORM_RATE_HI); + num <<= 8; + num |= (data & BROADCAST_STORM_RATE_LO) >> 8; + num = (num * 100 + BROADCAST_STORM_VALUE / 2) / BROADCAST_STORM_VALUE; + *percent = (u8) num; +} + +/** + * sw_dis_broad_storm - disable broadstorm + * @hw: The hardware instance. + * @port: The port index. + * + * This routine disables the broadcast storm limit function of the switch. + */ +static void sw_dis_broad_storm(struct ksz_hw *hw, int port) +{ + port_cfg_broad_storm(hw, port, 0); +} + +/** + * sw_ena_broad_storm - enable broadcast storm + * @hw: The hardware instance. + * @port: The port index. + * + * This routine enables the broadcast storm limit function of the switch. + */ +static void sw_ena_broad_storm(struct ksz_hw *hw, int port) +{ + sw_cfg_broad_storm(hw, hw->ksz_switch->broad_per); + port_cfg_broad_storm(hw, port, 1); +} + +/** + * sw_init_broad_storm - initialize broadcast storm + * @hw: The hardware instance. + * + * This routine initializes the broadcast storm limit function of the switch. + */ +static void sw_init_broad_storm(struct ksz_hw *hw) +{ + int port; + + hw->ksz_switch->broad_per = 1; + sw_cfg_broad_storm(hw, hw->ksz_switch->broad_per); + for (port = 0; port < TOTAL_PORT_NUM; port++) + sw_dis_broad_storm(hw, port); + sw_cfg(hw, KS8842_SWITCH_CTRL_2_OFFSET, MULTICAST_STORM_DISABLE, 1); +} + +/** + * hw_cfg_broad_storm - configure broadcast storm + * @hw: The hardware instance. + * @percent: Broadcast storm threshold in percent of transmit rate. + * + * This routine configures the broadcast storm threshold of the switch. + * It is called by user functions. The hardware should be acquired first. + */ +static void hw_cfg_broad_storm(struct ksz_hw *hw, u8 percent) +{ + if (percent > 100) + percent = 100; + + sw_cfg_broad_storm(hw, percent); + sw_get_broad_storm(hw, &percent); + hw->ksz_switch->broad_per = percent; +} + +/** + * sw_dis_prio_rate - disable switch priority rate + * @hw: The hardware instance. + * @port: The port index. + * + * This routine disables the priority rate function of the switch. + */ +static void sw_dis_prio_rate(struct ksz_hw *hw, int port) +{ + u32 addr; + + PORT_CTRL_ADDR(port, addr); + addr += KS8842_PORT_IN_RATE_OFFSET; + writel(0, hw->io + addr); +} + +/** + * sw_init_prio_rate - initialize switch prioirty rate + * @hw: The hardware instance. + * + * This routine initializes the priority rate function of the switch. + */ +static void sw_init_prio_rate(struct ksz_hw *hw) +{ + int port; + int prio; + struct ksz_switch *sw = hw->ksz_switch; + + for (port = 0; port < TOTAL_PORT_NUM; port++) { + for (prio = 0; prio < PRIO_QUEUES; prio++) { + sw->port_cfg[port].rx_rate[prio] = + sw->port_cfg[port].tx_rate[prio] = 0; + } + sw_dis_prio_rate(hw, port); + } +} + +/* Communication */ + +static inline void port_cfg_back_pressure(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_BACK_PRESSURE, set); +} + +static inline void port_cfg_force_flow_ctrl(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_FORCE_FLOW_CTRL, set); +} + +static inline int port_chk_back_pressure(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_BACK_PRESSURE); +} + +static inline int port_chk_force_flow_ctrl(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_FORCE_FLOW_CTRL); +} + +/* Spanning Tree */ + +static inline void port_cfg_dis_learn(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_LEARN_DISABLE, set); +} + +static inline void port_cfg_rx(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_RX_ENABLE, set); +} + +static inline void port_cfg_tx(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_TX_ENABLE, set); +} + +static inline void sw_cfg_fast_aging(struct ksz_hw *hw, int set) +{ + sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, SWITCH_FAST_AGING, set); +} + +static inline void sw_flush_dyn_mac_table(struct ksz_hw *hw) +{ + if (!(hw->overrides & FAST_AGING)) { + sw_cfg_fast_aging(hw, 1); + mdelay(1); + sw_cfg_fast_aging(hw, 0); + } +} + +/* VLAN */ + +static inline void port_cfg_ins_tag(struct ksz_hw *hw, int p, int insert) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_INSERT_TAG, insert); +} + +static inline void port_cfg_rmv_tag(struct ksz_hw *hw, int p, int remove) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_REMOVE_TAG, remove); +} + +static inline int port_chk_ins_tag(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_INSERT_TAG); +} + +static inline int port_chk_rmv_tag(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_REMOVE_TAG); +} + +static inline void port_cfg_dis_non_vid(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_DISCARD_NON_VID, set); +} + +static inline void port_cfg_in_filter(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_INGRESS_VLAN_FILTER, set); +} + +static inline int port_chk_dis_non_vid(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_DISCARD_NON_VID); +} + +static inline int port_chk_in_filter(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_INGRESS_VLAN_FILTER); +} + +/* Mirroring */ + +static inline void port_cfg_mirror_sniffer(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_SNIFFER, set); +} + +static inline void port_cfg_mirror_rx(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_RX, set); +} + +static inline void port_cfg_mirror_tx(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_MIRROR_TX, set); +} + +static inline void sw_cfg_mirror_rx_tx(struct ksz_hw *hw, int set) +{ + sw_cfg(hw, KS8842_SWITCH_CTRL_2_OFFSET, SWITCH_MIRROR_RX_TX, set); +} + +static void sw_init_mirror(struct ksz_hw *hw) +{ + int port; + + for (port = 0; port < TOTAL_PORT_NUM; port++) { + port_cfg_mirror_sniffer(hw, port, 0); + port_cfg_mirror_rx(hw, port, 0); + port_cfg_mirror_tx(hw, port, 0); + } + sw_cfg_mirror_rx_tx(hw, 0); +} + +static inline void sw_cfg_unk_def_deliver(struct ksz_hw *hw, int set) +{ + sw_cfg(hw, KS8842_SWITCH_CTRL_7_OFFSET, + SWITCH_UNK_DEF_PORT_ENABLE, set); +} + +static inline int sw_cfg_chk_unk_def_deliver(struct ksz_hw *hw) +{ + return sw_chk(hw, KS8842_SWITCH_CTRL_7_OFFSET, + SWITCH_UNK_DEF_PORT_ENABLE); +} + +static inline void sw_cfg_unk_def_port(struct ksz_hw *hw, int port, int set) +{ + port_cfg_shift(hw, port, KS8842_SWITCH_CTRL_7_OFFSET, 0, set); +} + +static inline int sw_chk_unk_def_port(struct ksz_hw *hw, int port) +{ + return port_chk_shift(hw, port, KS8842_SWITCH_CTRL_7_OFFSET, 0); +} + +/* Priority */ + +static inline void port_cfg_diffserv(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_DIFFSERV_ENABLE, set); +} + +static inline void port_cfg_802_1p(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_802_1P_ENABLE, set); +} + +static inline void port_cfg_replace_vid(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_USER_PRIORITY_CEILING, set); +} + +static inline void port_cfg_prio(struct ksz_hw *hw, int p, int set) +{ + port_cfg(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_PRIO_QUEUE_ENABLE, set); +} + +static inline int port_chk_diffserv(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_DIFFSERV_ENABLE); +} + +static inline int port_chk_802_1p(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_802_1P_ENABLE); +} + +static inline int port_chk_replace_vid(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_2_OFFSET, PORT_USER_PRIORITY_CEILING); +} + +static inline int port_chk_prio(struct ksz_hw *hw, int p) +{ + return port_chk(hw, p, + KS8842_PORT_CTRL_1_OFFSET, PORT_PRIO_QUEUE_ENABLE); +} + +/** + * sw_dis_diffserv - disable switch DiffServ priority + * @hw: The hardware instance. + * @port: The port index. + * + * This routine disables the DiffServ priority function of the switch. + */ +static void sw_dis_diffserv(struct ksz_hw *hw, int port) +{ + port_cfg_diffserv(hw, port, 0); +} + +/** + * sw_dis_802_1p - disable switch 802.1p priority + * @hw: The hardware instance. + * @port: The port index. + * + * This routine disables the 802.1p priority function of the switch. + */ +static void sw_dis_802_1p(struct ksz_hw *hw, int port) +{ + port_cfg_802_1p(hw, port, 0); +} + +/** + * sw_cfg_replace_null_vid - + * @hw: The hardware instance. + * @set: The flag to disable or enable. + * + */ +static void sw_cfg_replace_null_vid(struct ksz_hw *hw, int set) +{ + sw_cfg(hw, KS8842_SWITCH_CTRL_3_OFFSET, SWITCH_REPLACE_NULL_VID, set); +} + +/** + * sw_cfg_replace_vid - enable switch 802.10 priority re-mapping + * @hw: The hardware instance. + * @port: The port index. + * @set: The flag to disable or enable. + * + * This routine enables the 802.1p priority re-mapping function of the switch. + * That allows 802.1p priority field to be replaced with the port's default + * tag's priority value if the ingress packet's 802.1p priority has a higher + * priority than port's default tag's priority. + */ +static void sw_cfg_replace_vid(struct ksz_hw *hw, int port, int set) +{ + port_cfg_replace_vid(hw, port, set); +} + +/** + * sw_cfg_port_based - configure switch port based priority + * @hw: The hardware instance. + * @port: The port index. + * @prio: The priority to set. + * + * This routine configures the port based priority of the switch. + */ +static void sw_cfg_port_based(struct ksz_hw *hw, int port, u8 prio) +{ + u16 data; + + if (prio > PORT_BASED_PRIORITY_BASE) + prio = PORT_BASED_PRIORITY_BASE; + + hw->ksz_switch->port_cfg[port].port_prio = prio; + + port_r16(hw, port, KS8842_PORT_CTRL_1_OFFSET, &data); + data &= ~PORT_BASED_PRIORITY_MASK; + data |= prio << PORT_BASED_PRIORITY_SHIFT; + port_w16(hw, port, KS8842_PORT_CTRL_1_OFFSET, data); +} + +/** + * sw_dis_multi_queue - disable transmit multiple queues + * @hw: The hardware instance. + * @port: The port index. + * + * This routine disables the transmit multiple queues selection of the switch + * port. Only single transmit queue on the port. + */ +static void sw_dis_multi_queue(struct ksz_hw *hw, int port) +{ + port_cfg_prio(hw, port, 0); +} + +/** + * sw_init_prio - initialize switch priority + * @hw: The hardware instance. + * + * This routine initializes the switch QoS priority functions. + */ +static void sw_init_prio(struct ksz_hw *hw) +{ + int port; + int tos; + struct ksz_switch *sw = hw->ksz_switch; + + /* + * Init all the 802.1p tag priority value to be assigned to different + * priority queue. + */ + sw->p_802_1p[0] = 0; + sw->p_802_1p[1] = 0; + sw->p_802_1p[2] = 1; + sw->p_802_1p[3] = 1; + sw->p_802_1p[4] = 2; + sw->p_802_1p[5] = 2; + sw->p_802_1p[6] = 3; + sw->p_802_1p[7] = 3; + + /* + * Init all the DiffServ priority value to be assigned to priority + * queue 0. + */ + for (tos = 0; tos < DIFFSERV_ENTRIES; tos++) + sw->diffserv[tos] = 0; + + /* All QoS functions disabled. */ + for (port = 0; port < TOTAL_PORT_NUM; port++) { + sw_dis_multi_queue(hw, port); + sw_dis_diffserv(hw, port); + sw_dis_802_1p(hw, port); + sw_cfg_replace_vid(hw, port, 0); + + sw->port_cfg[port].port_prio = 0; + sw_cfg_port_based(hw, port, sw->port_cfg[port].port_prio); + } + sw_cfg_replace_null_vid(hw, 0); +} + +/** + * port_get_def_vid - get port default VID. + * @hw: The hardware instance. + * @port: The port index. + * @vid: Buffer to store the VID. + * + * This routine retrieves the default VID of the port. + */ +static void port_get_def_vid(struct ksz_hw *hw, int port, u16 *vid) +{ + u32 addr; + + PORT_CTRL_ADDR(port, addr); + addr += KS8842_PORT_CTRL_VID_OFFSET; + *vid = readw(hw->io + addr); +} + +/** + * sw_init_vlan - initialize switch VLAN + * @hw: The hardware instance. + * + * This routine initializes the VLAN function of the switch. + */ +static void sw_init_vlan(struct ksz_hw *hw) +{ + int port; + int entry; + struct ksz_switch *sw = hw->ksz_switch; + + /* Read 16 VLAN entries from device's VLAN table. */ + for (entry = 0; entry < VLAN_TABLE_ENTRIES; entry++) { + sw_r_vlan_table(hw, entry, + &sw->vlan_table[entry].vid, + &sw->vlan_table[entry].fid, + &sw->vlan_table[entry].member); + } + + for (port = 0; port < TOTAL_PORT_NUM; port++) { + port_get_def_vid(hw, port, &sw->port_cfg[port].vid); + sw->port_cfg[port].member = PORT_MASK; + } +} + +/** + * sw_cfg_port_base_vlan - configure port-based VLAN membership + * @hw: The hardware instance. + * @port: The port index. + * @member: The port-based VLAN membership. + * + * This routine configures the port-based VLAN membership of the port. + */ +static void sw_cfg_port_base_vlan(struct ksz_hw *hw, int port, u8 member) +{ + u32 addr; + u8 data; + + PORT_CTRL_ADDR(port, addr); + addr += KS8842_PORT_CTRL_2_OFFSET; + + data = readb(hw->io + addr); + data &= ~PORT_VLAN_MEMBERSHIP; + data |= (member & PORT_MASK); + writeb(data, hw->io + addr); + + hw->ksz_switch->port_cfg[port].member = member; +} + +/** + * sw_get_addr - get the switch MAC address. + * @hw: The hardware instance. + * @mac_addr: Buffer to store the MAC address. + * + * This function retrieves the MAC address of the switch. + */ +static inline void sw_get_addr(struct ksz_hw *hw, u8 *mac_addr) +{ + int i; + + for (i = 0; i < 6; i += 2) { + mac_addr[i] = readb(hw->io + KS8842_MAC_ADDR_0_OFFSET + i); + mac_addr[1 + i] = readb(hw->io + KS8842_MAC_ADDR_1_OFFSET + i); + } +} + +/** + * sw_set_addr - configure switch MAC address + * @hw: The hardware instance. + * @mac_addr: The MAC address. + * + * This function configures the MAC address of the switch. + */ +static void sw_set_addr(struct ksz_hw *hw, u8 *mac_addr) +{ + int i; + + for (i = 0; i < 6; i += 2) { + writeb(mac_addr[i], hw->io + KS8842_MAC_ADDR_0_OFFSET + i); + writeb(mac_addr[1 + i], hw->io + KS8842_MAC_ADDR_1_OFFSET + i); + } +} + +/** + * sw_set_global_ctrl - set switch global control + * @hw: The hardware instance. + * + * This routine sets the global control of the switch function. + */ +static void sw_set_global_ctrl(struct ksz_hw *hw) +{ + u16 data; + + /* Enable switch MII flow control. */ + data = readw(hw->io + KS8842_SWITCH_CTRL_3_OFFSET); + data |= SWITCH_FLOW_CTRL; + writew(data, hw->io + KS8842_SWITCH_CTRL_3_OFFSET); + + data = readw(hw->io + KS8842_SWITCH_CTRL_1_OFFSET); + + /* Enable aggressive back off algorithm in half duplex mode. */ + data |= SWITCH_AGGR_BACKOFF; + + /* Enable automatic fast aging when link changed detected. */ + data |= SWITCH_AGING_ENABLE; + data |= SWITCH_LINK_AUTO_AGING; + + if (hw->overrides & FAST_AGING) + data |= SWITCH_FAST_AGING; + else + data &= ~SWITCH_FAST_AGING; + writew(data, hw->io + KS8842_SWITCH_CTRL_1_OFFSET); + + data = readw(hw->io + KS8842_SWITCH_CTRL_2_OFFSET); + + /* Enable no excessive collision drop. */ + data |= NO_EXC_COLLISION_DROP; + writew(data, hw->io + KS8842_SWITCH_CTRL_2_OFFSET); +} + +enum { + STP_STATE_DISABLED = 0, + STP_STATE_LISTENING, + STP_STATE_LEARNING, + STP_STATE_FORWARDING, + STP_STATE_BLOCKED, + STP_STATE_SIMPLE +}; + +/** + * port_set_stp_state - configure port spanning tree state + * @hw: The hardware instance. + * @port: The port index. + * @state: The spanning tree state. + * + * This routine configures the spanning tree state of the port. + */ +static void port_set_stp_state(struct ksz_hw *hw, int port, int state) +{ + u16 data; + + port_r16(hw, port, KS8842_PORT_CTRL_2_OFFSET, &data); + switch (state) { + case STP_STATE_DISABLED: + data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE); + data |= PORT_LEARN_DISABLE; + break; + case STP_STATE_LISTENING: +/* + * No need to turn on transmit because of port direct mode. + * Turning on receive is required if static MAC table is not setup. + */ + data &= ~PORT_TX_ENABLE; + data |= PORT_RX_ENABLE; + data |= PORT_LEARN_DISABLE; + break; + case STP_STATE_LEARNING: + data &= ~PORT_TX_ENABLE; + data |= PORT_RX_ENABLE; + data &= ~PORT_LEARN_DISABLE; + break; + case STP_STATE_FORWARDING: + data |= (PORT_TX_ENABLE | PORT_RX_ENABLE); + data &= ~PORT_LEARN_DISABLE; + break; + case STP_STATE_BLOCKED: +/* + * Need to setup static MAC table with override to keep receiving BPDU + * messages. See sw_init_stp routine. + */ + data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE); + data |= PORT_LEARN_DISABLE; + break; + case STP_STATE_SIMPLE: + data |= (PORT_TX_ENABLE | PORT_RX_ENABLE); + data |= PORT_LEARN_DISABLE; + break; + } + port_w16(hw, port, KS8842_PORT_CTRL_2_OFFSET, data); + hw->ksz_switch->port_cfg[port].stp_state = state; +} + +#define STP_ENTRY 0 +#define BROADCAST_ENTRY 1 +#define BRIDGE_ADDR_ENTRY 2 +#define IPV6_ADDR_ENTRY 3 + +/** + * sw_clr_sta_mac_table - clear static MAC table + * @hw: The hardware instance. + * + * This routine clears the static MAC table. + */ +static void sw_clr_sta_mac_table(struct ksz_hw *hw) +{ + struct ksz_mac_table *entry; + int i; + + for (i = 0; i < STATIC_MAC_TABLE_ENTRIES; i++) { + entry = &hw->ksz_switch->mac_table[i]; + sw_w_sta_mac_table(hw, i, + entry->mac_addr, entry->ports, + entry->override, 0, + entry->use_fid, entry->fid); + } +} + +/** + * sw_init_stp - initialize switch spanning tree support + * @hw: The hardware instance. + * + * This routine initializes the spanning tree support of the switch. + */ +static void sw_init_stp(struct ksz_hw *hw) +{ + struct ksz_mac_table *entry; + + entry = &hw->ksz_switch->mac_table[STP_ENTRY]; + entry->mac_addr[0] = 0x01; + entry->mac_addr[1] = 0x80; + entry->mac_addr[2] = 0xC2; + entry->mac_addr[3] = 0x00; + entry->mac_addr[4] = 0x00; + entry->mac_addr[5] = 0x00; + entry->ports = HOST_MASK; + entry->override = 1; + entry->valid = 1; + sw_w_sta_mac_table(hw, STP_ENTRY, + entry->mac_addr, entry->ports, + entry->override, entry->valid, + entry->use_fid, entry->fid); +} + +/** + * sw_block_addr - block certain packets from the host port + * @hw: The hardware instance. + * + * This routine blocks certain packets from reaching to the host port. + */ +static void sw_block_addr(struct ksz_hw *hw) +{ + struct ksz_mac_table *entry; + int i; + + for (i = BROADCAST_ENTRY; i <= IPV6_ADDR_ENTRY; i++) { + entry = &hw->ksz_switch->mac_table[i]; + entry->valid = 0; + sw_w_sta_mac_table(hw, i, + entry->mac_addr, entry->ports, + entry->override, entry->valid, + entry->use_fid, entry->fid); + } +} + +#define PHY_LINK_SUPPORT \ + (PHY_AUTO_NEG_ASYM_PAUSE | \ + PHY_AUTO_NEG_SYM_PAUSE | \ + PHY_AUTO_NEG_100BT4 | \ + PHY_AUTO_NEG_100BTX_FD | \ + PHY_AUTO_NEG_100BTX | \ + PHY_AUTO_NEG_10BT_FD | \ + PHY_AUTO_NEG_10BT) + +static inline void hw_r_phy_ctrl(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_CTRL_OFFSET); +} + +static inline void hw_w_phy_ctrl(struct ksz_hw *hw, int phy, u16 data) +{ + writew(data, hw->io + phy + KS884X_PHY_CTRL_OFFSET); +} + +static inline void hw_r_phy_link_stat(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_STATUS_OFFSET); +} + +static inline void hw_r_phy_auto_neg(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_AUTO_NEG_OFFSET); +} + +static inline void hw_w_phy_auto_neg(struct ksz_hw *hw, int phy, u16 data) +{ + writew(data, hw->io + phy + KS884X_PHY_AUTO_NEG_OFFSET); +} + +static inline void hw_r_phy_rem_cap(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_REMOTE_CAP_OFFSET); +} + +static inline void hw_r_phy_crossover(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_CTRL_OFFSET); +} + +static inline void hw_w_phy_crossover(struct ksz_hw *hw, int phy, u16 data) +{ + writew(data, hw->io + phy + KS884X_PHY_CTRL_OFFSET); +} + +static inline void hw_r_phy_polarity(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_PHY_CTRL_OFFSET); +} + +static inline void hw_w_phy_polarity(struct ksz_hw *hw, int phy, u16 data) +{ + writew(data, hw->io + phy + KS884X_PHY_PHY_CTRL_OFFSET); +} + +static inline void hw_r_phy_link_md(struct ksz_hw *hw, int phy, u16 *data) +{ + *data = readw(hw->io + phy + KS884X_PHY_LINK_MD_OFFSET); +} + +static inline void hw_w_phy_link_md(struct ksz_hw *hw, int phy, u16 data) +{ + writew(data, hw->io + phy + KS884X_PHY_LINK_MD_OFFSET); +} + +/** + * hw_r_phy - read data from PHY register + * @hw: The hardware instance. + * @port: Port to read. + * @reg: PHY register to read. + * @val: Buffer to store the read data. + * + * This routine reads data from the PHY register. + */ +static void hw_r_phy(struct ksz_hw *hw, int port, u16 reg, u16 *val) +{ + int phy; + + phy = KS884X_PHY_1_CTRL_OFFSET + port * PHY_CTRL_INTERVAL + reg; + *val = readw(hw->io + phy); +} + +/** + * port_w_phy - write data to PHY register + * @hw: The hardware instance. + * @port: Port to write. + * @reg: PHY register to write. + * @val: Word data to write. + * + * This routine writes data to the PHY register. + */ +static void hw_w_phy(struct ksz_hw *hw, int port, u16 reg, u16 val) +{ + int phy; + + phy = KS884X_PHY_1_CTRL_OFFSET + port * PHY_CTRL_INTERVAL + reg; + writew(val, hw->io + phy); +} + +/* + * EEPROM access functions + */ + +#define AT93C_CODE 0 +#define AT93C_WR_OFF 0x00 +#define AT93C_WR_ALL 0x10 +#define AT93C_ER_ALL 0x20 +#define AT93C_WR_ON 0x30 + +#define AT93C_WRITE 1 +#define AT93C_READ 2 +#define AT93C_ERASE 3 + +#define EEPROM_DELAY 4 + +static inline void drop_gpio(struct ksz_hw *hw, u8 gpio) +{ + u16 data; + + data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET); + data &= ~gpio; + writew(data, hw->io + KS884X_EEPROM_CTRL_OFFSET); +} + +static inline void raise_gpio(struct ksz_hw *hw, u8 gpio) +{ + u16 data; + + data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET); + data |= gpio; + writew(data, hw->io + KS884X_EEPROM_CTRL_OFFSET); +} + +static inline u8 state_gpio(struct ksz_hw *hw, u8 gpio) +{ + u16 data; + + data = readw(hw->io + KS884X_EEPROM_CTRL_OFFSET); + return (u8)(data & gpio); +} + +static void eeprom_clk(struct ksz_hw *hw) +{ + raise_gpio(hw, EEPROM_SERIAL_CLOCK); + udelay(EEPROM_DELAY); + drop_gpio(hw, EEPROM_SERIAL_CLOCK); + udelay(EEPROM_DELAY); +} + +static u16 spi_r(struct ksz_hw *hw) +{ + int i; + u16 temp = 0; + + for (i = 15; i >= 0; i--) { + raise_gpio(hw, EEPROM_SERIAL_CLOCK); + udelay(EEPROM_DELAY); + + temp |= (state_gpio(hw, EEPROM_DATA_IN)) ? 1 << i : 0; + + drop_gpio(hw, EEPROM_SERIAL_CLOCK); + udelay(EEPROM_DELAY); + } + return temp; +} + +static void spi_w(struct ksz_hw *hw, u16 data) +{ + int i; + + for (i = 15; i >= 0; i--) { + (data & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) : + drop_gpio(hw, EEPROM_DATA_OUT); + eeprom_clk(hw); + } +} + +static void spi_reg(struct ksz_hw *hw, u8 data, u8 reg) +{ + int i; + + /* Initial start bit */ + raise_gpio(hw, EEPROM_DATA_OUT); + eeprom_clk(hw); + + /* AT93C operation */ + for (i = 1; i >= 0; i--) { + (data & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) : + drop_gpio(hw, EEPROM_DATA_OUT); + eeprom_clk(hw); + } + + /* Address location */ + for (i = 5; i >= 0; i--) { + (reg & (0x01 << i)) ? raise_gpio(hw, EEPROM_DATA_OUT) : + drop_gpio(hw, EEPROM_DATA_OUT); + eeprom_clk(hw); + } +} + +#define EEPROM_DATA_RESERVED 0 +#define EEPROM_DATA_MAC_ADDR_0 1 +#define EEPROM_DATA_MAC_ADDR_1 2 +#define EEPROM_DATA_MAC_ADDR_2 3 +#define EEPROM_DATA_SUBSYS_ID 4 +#define EEPROM_DATA_SUBSYS_VEN_ID 5 +#define EEPROM_DATA_PM_CAP 6 + +/* User defined EEPROM data */ +#define EEPROM_DATA_OTHER_MAC_ADDR 9 + +/** + * eeprom_read - read from AT93C46 EEPROM + * @hw: The hardware instance. + * @reg: The register offset. + * + * This function reads a word from the AT93C46 EEPROM. + * + * Return the data value. + */ +static u16 eeprom_read(struct ksz_hw *hw, u8 reg) +{ + u16 data; + + raise_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT); + + spi_reg(hw, AT93C_READ, reg); + data = spi_r(hw); + + drop_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT); + + return data; +} + +/** + * eeprom_write - write to AT93C46 EEPROM + * @hw: The hardware instance. + * @reg: The register offset. + * @data: The data value. + * + * This procedure writes a word to the AT93C46 EEPROM. + */ +static void eeprom_write(struct ksz_hw *hw, u8 reg, u16 data) +{ + int timeout; + + raise_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT); + + /* Enable write. */ + spi_reg(hw, AT93C_CODE, AT93C_WR_ON); + drop_gpio(hw, EEPROM_CHIP_SELECT); + udelay(1); + + /* Erase the register. */ + raise_gpio(hw, EEPROM_CHIP_SELECT); + spi_reg(hw, AT93C_ERASE, reg); + drop_gpio(hw, EEPROM_CHIP_SELECT); + udelay(1); + + /* Check operation complete. */ + raise_gpio(hw, EEPROM_CHIP_SELECT); + timeout = 8; + mdelay(2); + do { + mdelay(1); + } while (!state_gpio(hw, EEPROM_DATA_IN) && --timeout); + drop_gpio(hw, EEPROM_CHIP_SELECT); + udelay(1); + + /* Write the register. */ + raise_gpio(hw, EEPROM_CHIP_SELECT); + spi_reg(hw, AT93C_WRITE, reg); + spi_w(hw, data); + drop_gpio(hw, EEPROM_CHIP_SELECT); + udelay(1); + + /* Check operation complete. */ + raise_gpio(hw, EEPROM_CHIP_SELECT); + timeout = 8; + mdelay(2); + do { + mdelay(1); + } while (!state_gpio(hw, EEPROM_DATA_IN) && --timeout); + drop_gpio(hw, EEPROM_CHIP_SELECT); + udelay(1); + + /* Disable write. */ + raise_gpio(hw, EEPROM_CHIP_SELECT); + spi_reg(hw, AT93C_CODE, AT93C_WR_OFF); + + drop_gpio(hw, EEPROM_ACCESS_ENABLE | EEPROM_CHIP_SELECT); +} + +/* + * Link detection routines + */ + +static u16 advertised_flow_ctrl(struct ksz_port *port, u16 ctrl) +{ + ctrl &= ~PORT_AUTO_NEG_SYM_PAUSE; + switch (port->flow_ctrl) { + case PHY_FLOW_CTRL: + ctrl |= PORT_AUTO_NEG_SYM_PAUSE; + break; + /* Not supported. */ + case PHY_TX_ONLY: + case PHY_RX_ONLY: + default: + break; + } + return ctrl; +} + +static void set_flow_ctrl(struct ksz_hw *hw, int rx, int tx) +{ + u32 rx_cfg; + u32 tx_cfg; + + rx_cfg = hw->rx_cfg; + tx_cfg = hw->tx_cfg; + if (rx) + hw->rx_cfg |= DMA_RX_FLOW_ENABLE; + else + hw->rx_cfg &= ~DMA_RX_FLOW_ENABLE; + if (tx) + hw->tx_cfg |= DMA_TX_FLOW_ENABLE; + else + hw->tx_cfg &= ~DMA_TX_FLOW_ENABLE; + if (hw->enabled) { + if (rx_cfg != hw->rx_cfg) + writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL); + if (tx_cfg != hw->tx_cfg) + writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL); + } +} + +static void determine_flow_ctrl(struct ksz_hw *hw, struct ksz_port *port, + u16 local, u16 remote) +{ + int rx; + int tx; + + if (hw->overrides & PAUSE_FLOW_CTRL) + return; + + rx = tx = 0; + if (port->force_link) + rx = tx = 1; + if (remote & PHY_AUTO_NEG_SYM_PAUSE) { + if (local & PHY_AUTO_NEG_SYM_PAUSE) { + rx = tx = 1; + } else if ((remote & PHY_AUTO_NEG_ASYM_PAUSE) && + (local & PHY_AUTO_NEG_PAUSE) == + PHY_AUTO_NEG_ASYM_PAUSE) { + tx = 1; + } + } else if (remote & PHY_AUTO_NEG_ASYM_PAUSE) { + if ((local & PHY_AUTO_NEG_PAUSE) == PHY_AUTO_NEG_PAUSE) + rx = 1; + } + if (!hw->ksz_switch) + set_flow_ctrl(hw, rx, tx); +} + +static inline void port_cfg_change(struct ksz_hw *hw, struct ksz_port *port, + struct ksz_port_info *info, u16 link_status) +{ + if ((hw->features & HALF_DUPLEX_SIGNAL_BUG) && + !(hw->overrides & PAUSE_FLOW_CTRL)) { + u32 cfg = hw->tx_cfg; + + /* Disable flow control in the half duplex mode. */ + if (1 == info->duplex) + hw->tx_cfg &= ~DMA_TX_FLOW_ENABLE; + if (hw->enabled && cfg != hw->tx_cfg) + writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL); + } +} + +/** + * port_get_link_speed - get current link status + * @port: The port instance. + * + * This routine reads PHY registers to determine the current link status of the + * switch ports. + */ +static void port_get_link_speed(struct ksz_port *port) +{ + uint interrupt; + struct ksz_port_info *info; + struct ksz_port_info *linked = NULL; + struct ksz_hw *hw = port->hw; + u16 data; + u16 status; + u8 local; + u8 remote; + int i; + int p; + int change = 0; + + interrupt = hw_block_intr(hw); + + for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) { + info = &hw->port_info[p]; + port_r16(hw, p, KS884X_PORT_CTRL_4_OFFSET, &data); + port_r16(hw, p, KS884X_PORT_STATUS_OFFSET, &status); + + /* + * Link status is changing all the time even when there is no + * cable connection! + */ + remote = status & (PORT_AUTO_NEG_COMPLETE | + PORT_STATUS_LINK_GOOD); + local = (u8) data; + + /* No change to status. */ + if (local == info->advertised && remote == info->partner) + continue; + + info->advertised = local; + info->partner = remote; + if (status & PORT_STATUS_LINK_GOOD) { + + /* Remember the first linked port. */ + if (!linked) + linked = info; + + info->tx_rate = 10 * TX_RATE_UNIT; + if (status & PORT_STATUS_SPEED_100MBIT) + info->tx_rate = 100 * TX_RATE_UNIT; + + info->duplex = 1; + if (status & PORT_STATUS_FULL_DUPLEX) + info->duplex = 2; + + if (media_connected != info->state) { + hw_r_phy(hw, p, KS884X_PHY_AUTO_NEG_OFFSET, + &data); + hw_r_phy(hw, p, KS884X_PHY_REMOTE_CAP_OFFSET, + &status); + determine_flow_ctrl(hw, port, data, status); + if (hw->ksz_switch) { + port_cfg_back_pressure(hw, p, + (1 == info->duplex)); + } + change |= 1 << i; + port_cfg_change(hw, port, info, status); + } + info->state = media_connected; + } else { + if (media_disconnected != info->state) { + change |= 1 << i; + + /* Indicate the link just goes down. */ + hw->port_mib[p].link_down = 1; + } + info->state = media_disconnected; + } + hw->port_mib[p].state = (u8) info->state; + } + + if (linked && media_disconnected == port->linked->state) + port->linked = linked; + + hw_restore_intr(hw, interrupt); +} + +#define PHY_RESET_TIMEOUT 10 + +/** + * port_set_link_speed - set port speed + * @port: The port instance. + * + * This routine sets the link speed of the switch ports. + */ +static void port_set_link_speed(struct ksz_port *port) +{ + struct ksz_port_info *info; + struct ksz_hw *hw = port->hw; + u16 data; + u16 cfg; + u8 status; + int i; + int p; + + for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) { + info = &hw->port_info[p]; + + port_r16(hw, p, KS884X_PORT_CTRL_4_OFFSET, &data); + port_r8(hw, p, KS884X_PORT_STATUS_OFFSET, &status); + + cfg = 0; + if (status & PORT_STATUS_LINK_GOOD) + cfg = data; + + data |= PORT_AUTO_NEG_ENABLE; + data = advertised_flow_ctrl(port, data); + + data |= PORT_AUTO_NEG_100BTX_FD | PORT_AUTO_NEG_100BTX | + PORT_AUTO_NEG_10BT_FD | PORT_AUTO_NEG_10BT; + + /* Check if manual configuration is specified by the user. */ + if (port->speed || port->duplex) { + if (10 == port->speed) + data &= ~(PORT_AUTO_NEG_100BTX_FD | + PORT_AUTO_NEG_100BTX); + else if (100 == port->speed) + data &= ~(PORT_AUTO_NEG_10BT_FD | + PORT_AUTO_NEG_10BT); + if (1 == port->duplex) + data &= ~(PORT_AUTO_NEG_100BTX_FD | + PORT_AUTO_NEG_10BT_FD); + else if (2 == port->duplex) + data &= ~(PORT_AUTO_NEG_100BTX | + PORT_AUTO_NEG_10BT); + } + if (data != cfg) { + data |= PORT_AUTO_NEG_RESTART; + port_w16(hw, p, KS884X_PORT_CTRL_4_OFFSET, data); + } + } +} + +/** + * port_force_link_speed - force port speed + * @port: The port instance. + * + * This routine forces the link speed of the switch ports. + */ +static void port_force_link_speed(struct ksz_port *port) +{ + struct ksz_hw *hw = port->hw; + u16 data; + int i; + int phy; + int p; + + for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) { + phy = KS884X_PHY_1_CTRL_OFFSET + p * PHY_CTRL_INTERVAL; + hw_r_phy_ctrl(hw, phy, &data); + + data &= ~PHY_AUTO_NEG_ENABLE; + + if (10 == port->speed) + data &= ~PHY_SPEED_100MBIT; + else if (100 == port->speed) + data |= PHY_SPEED_100MBIT; + if (1 == port->duplex) + data &= ~PHY_FULL_DUPLEX; + else if (2 == port->duplex) + data |= PHY_FULL_DUPLEX; + hw_w_phy_ctrl(hw, phy, data); + } +} + +static void port_set_power_saving(struct ksz_port *port, int enable) +{ + struct ksz_hw *hw = port->hw; + int i; + int p; + + for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) + port_cfg(hw, p, + KS884X_PORT_CTRL_4_OFFSET, PORT_POWER_DOWN, enable); +} + +/* + * KSZ8841 power management functions + */ + +/** + * hw_chk_wol_pme_status - check PMEN pin + * @hw: The hardware instance. + * + * This function is used to check PMEN pin is asserted. + * + * Return 1 if PMEN pin is asserted; otherwise, 0. + */ +static int hw_chk_wol_pme_status(struct ksz_hw *hw) +{ + struct dev_info *hw_priv = container_of(hw, struct dev_info, hw); + struct pci_dev *pdev = hw_priv->pdev; + u16 data; + + if (!pdev->pm_cap) + return 0; + pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data); + return (data & PCI_PM_CTRL_PME_STATUS) == PCI_PM_CTRL_PME_STATUS; +} + +/** + * hw_clr_wol_pme_status - clear PMEN pin + * @hw: The hardware instance. + * + * This routine is used to clear PME_Status to deassert PMEN pin. + */ +static void hw_clr_wol_pme_status(struct ksz_hw *hw) +{ + struct dev_info *hw_priv = container_of(hw, struct dev_info, hw); + struct pci_dev *pdev = hw_priv->pdev; + u16 data; + + if (!pdev->pm_cap) + return; + + /* Clear PME_Status to deassert PMEN pin. */ + pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data); + data |= PCI_PM_CTRL_PME_STATUS; + pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, data); +} + +/** + * hw_cfg_wol_pme - enable or disable Wake-on-LAN + * @hw: The hardware instance. + * @set: The flag indicating whether to enable or disable. + * + * This routine is used to enable or disable Wake-on-LAN. + */ +static void hw_cfg_wol_pme(struct ksz_hw *hw, int set) +{ + struct dev_info *hw_priv = container_of(hw, struct dev_info, hw); + struct pci_dev *pdev = hw_priv->pdev; + u16 data; + + if (!pdev->pm_cap) + return; + pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &data); + data &= ~PCI_PM_CTRL_STATE_MASK; + if (set) + data |= PCI_PM_CTRL_PME_ENABLE | PCI_D3hot; + else + data &= ~PCI_PM_CTRL_PME_ENABLE; + pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, data); +} + +/** + * hw_cfg_wol - configure Wake-on-LAN features + * @hw: The hardware instance. + * @frame: The pattern frame bit. + * @set: The flag indicating whether to enable or disable. + * + * This routine is used to enable or disable certain Wake-on-LAN features. + */ +static void hw_cfg_wol(struct ksz_hw *hw, u16 frame, int set) +{ + u16 data; + + data = readw(hw->io + KS8841_WOL_CTRL_OFFSET); + if (set) + data |= frame; + else + data &= ~frame; + writew(data, hw->io + KS8841_WOL_CTRL_OFFSET); +} + +/** + * hw_set_wol_frame - program Wake-on-LAN pattern + * @hw: The hardware instance. + * @i: The frame index. + * @mask_size: The size of the mask. + * @mask: Mask to ignore certain bytes in the pattern. + * @frame_size: The size of the frame. + * @pattern: The frame data. + * + * This routine is used to program Wake-on-LAN pattern. + */ +static void hw_set_wol_frame(struct ksz_hw *hw, int i, uint mask_size, + const u8 *mask, uint frame_size, const u8 *pattern) +{ + int bits; + int from; + int len; + int to; + u32 crc; + u8 data[64]; + u8 val = 0; + + if (frame_size > mask_size * 8) + frame_size = mask_size * 8; + if (frame_size > 64) + frame_size = 64; + + i *= 0x10; + writel(0, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i); + writel(0, hw->io + KS8841_WOL_FRAME_BYTE2_OFFSET + i); + + bits = len = from = to = 0; + do { + if (bits) { + if ((val & 1)) + data[to++] = pattern[from]; + val >>= 1; + ++from; + --bits; + } else { + val = mask[len]; + writeb(val, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i + + len); + ++len; + if (val) + bits = 8; + else + from += 8; + } + } while (from < (int) frame_size); + if (val) { + bits = mask[len - 1]; + val <<= (from % 8); + bits &= ~val; + writeb(bits, hw->io + KS8841_WOL_FRAME_BYTE0_OFFSET + i + len - + 1); + } + crc = ether_crc(to, data); + writel(crc, hw->io + KS8841_WOL_FRAME_CRC_OFFSET + i); +} + +/** + * hw_add_wol_arp - add ARP pattern + * @hw: The hardware instance. + * @ip_addr: The IPv4 address assigned to the device. + * + * This routine is used to add ARP pattern for waking up the host. + */ +static void hw_add_wol_arp(struct ksz_hw *hw, const u8 *ip_addr) +{ + static const u8 mask[6] = { 0x3F, 0xF0, 0x3F, 0x00, 0xC0, 0x03 }; + u8 pattern[42] = { + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x08, 0x06, + 0x00, 0x01, 0x08, 0x00, 0x06, 0x04, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 }; + + memcpy(&pattern[38], ip_addr, 4); + hw_set_wol_frame(hw, 3, 6, mask, 42, pattern); +} + +/** + * hw_add_wol_bcast - add broadcast pattern + * @hw: The hardware instance. + * + * This routine is used to add broadcast pattern for waking up the host. + */ +static void hw_add_wol_bcast(struct ksz_hw *hw) +{ + static const u8 mask[] = { 0x3F }; + static const u8 pattern[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; + + hw_set_wol_frame(hw, 2, 1, mask, ETH_ALEN, pattern); +} + +/** + * hw_add_wol_mcast - add multicast pattern + * @hw: The hardware instance. + * + * This routine is used to add multicast pattern for waking up the host. + * + * It is assumed the multicast packet is the ICMPv6 neighbor solicitation used + * by IPv6 ping command. Note that multicast packets are filtred through the + * multicast hash table, so not all multicast packets can wake up the host. + */ +static void hw_add_wol_mcast(struct ksz_hw *hw) +{ + static const u8 mask[] = { 0x3F }; + u8 pattern[] = { 0x33, 0x33, 0xFF, 0x00, 0x00, 0x00 }; + + memcpy(&pattern[3], &hw->override_addr[3], 3); + hw_set_wol_frame(hw, 1, 1, mask, 6, pattern); +} + +/** + * hw_add_wol_ucast - add unicast pattern + * @hw: The hardware instance. + * + * This routine is used to add unicast pattern to wakeup the host. + * + * It is assumed the unicast packet is directed to the device, as the hardware + * can only receive them in normal case. + */ +static void hw_add_wol_ucast(struct ksz_hw *hw) +{ + static const u8 mask[] = { 0x3F }; + + hw_set_wol_frame(hw, 0, 1, mask, ETH_ALEN, hw->override_addr); +} + +/** + * hw_enable_wol - enable Wake-on-LAN + * @hw: The hardware instance. + * @wol_enable: The Wake-on-LAN settings. + * @net_addr: The IPv4 address assigned to the device. + * + * This routine is used to enable Wake-on-LAN depending on driver settings. + */ +static void hw_enable_wol(struct ksz_hw *hw, u32 wol_enable, const u8 *net_addr) +{ + hw_cfg_wol(hw, KS8841_WOL_MAGIC_ENABLE, (wol_enable & WAKE_MAGIC)); + hw_cfg_wol(hw, KS8841_WOL_FRAME0_ENABLE, (wol_enable & WAKE_UCAST)); + hw_add_wol_ucast(hw); + hw_cfg_wol(hw, KS8841_WOL_FRAME1_ENABLE, (wol_enable & WAKE_MCAST)); + hw_add_wol_mcast(hw); + hw_cfg_wol(hw, KS8841_WOL_FRAME2_ENABLE, (wol_enable & WAKE_BCAST)); + hw_cfg_wol(hw, KS8841_WOL_FRAME3_ENABLE, (wol_enable & WAKE_ARP)); + hw_add_wol_arp(hw, net_addr); +} + +/** + * hw_init - check driver is correct for the hardware + * @hw: The hardware instance. + * + * This function checks the hardware is correct for this driver and sets the + * hardware up for proper initialization. + * + * Return number of ports or 0 if not right. + */ +static int hw_init(struct ksz_hw *hw) +{ + int rc = 0; + u16 data; + u16 revision; + + /* Set bus speed to 125MHz. */ + writew(BUS_SPEED_125_MHZ, hw->io + KS884X_BUS_CTRL_OFFSET); + + /* Check KSZ884x chip ID. */ + data = readw(hw->io + KS884X_CHIP_ID_OFFSET); + + revision = (data & KS884X_REVISION_MASK) >> KS884X_REVISION_SHIFT; + data &= KS884X_CHIP_ID_MASK_41; + if (REG_CHIP_ID_41 == data) + rc = 1; + else if (REG_CHIP_ID_42 == data) + rc = 2; + else + return 0; + + /* Setup hardware features or bug workarounds. */ + if (revision <= 1) { + hw->features |= SMALL_PACKET_TX_BUG; + if (1 == rc) + hw->features |= HALF_DUPLEX_SIGNAL_BUG; + } + return rc; +} + +/** + * hw_reset - reset the hardware + * @hw: The hardware instance. + * + * This routine resets the hardware. + */ +static void hw_reset(struct ksz_hw *hw) +{ + writew(GLOBAL_SOFTWARE_RESET, hw->io + KS884X_GLOBAL_CTRL_OFFSET); + + /* Wait for device to reset. */ + mdelay(10); + + /* Write 0 to clear device reset. */ + writew(0, hw->io + KS884X_GLOBAL_CTRL_OFFSET); +} + +/** + * hw_setup - setup the hardware + * @hw: The hardware instance. + * + * This routine setup the hardware for proper operation. + */ +static void hw_setup(struct ksz_hw *hw) +{ +#if SET_DEFAULT_LED + u16 data; + + /* Change default LED mode. */ + data = readw(hw->io + KS8842_SWITCH_CTRL_5_OFFSET); + data &= ~LED_MODE; + data |= SET_DEFAULT_LED; + writew(data, hw->io + KS8842_SWITCH_CTRL_5_OFFSET); +#endif + + /* Setup transmit control. */ + hw->tx_cfg = (DMA_TX_PAD_ENABLE | DMA_TX_CRC_ENABLE | + (DMA_BURST_DEFAULT << DMA_BURST_SHIFT) | DMA_TX_ENABLE); + + /* Setup receive control. */ + hw->rx_cfg = (DMA_RX_BROADCAST | DMA_RX_UNICAST | + (DMA_BURST_DEFAULT << DMA_BURST_SHIFT) | DMA_RX_ENABLE); + hw->rx_cfg |= KS884X_DMA_RX_MULTICAST; + + /* Hardware cannot handle UDP packet in IP fragments. */ + hw->rx_cfg |= (DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP); + + if (hw->all_multi) + hw->rx_cfg |= DMA_RX_ALL_MULTICAST; + if (hw->promiscuous) + hw->rx_cfg |= DMA_RX_PROMISCUOUS; +} + +/** + * hw_setup_intr - setup interrupt mask + * @hw: The hardware instance. + * + * This routine setup the interrupt mask for proper operation. + */ +static void hw_setup_intr(struct ksz_hw *hw) +{ + hw->intr_mask = KS884X_INT_MASK | KS884X_INT_RX_OVERRUN; +} + +static void ksz_check_desc_num(struct ksz_desc_info *info) +{ +#define MIN_DESC_SHIFT 2 + + int alloc = info->alloc; + int shift; + + shift = 0; + while (!(alloc & 1)) { + shift++; + alloc >>= 1; + } + if (alloc != 1 || shift < MIN_DESC_SHIFT) { + pr_alert("Hardware descriptor numbers not right!\n"); + while (alloc) { + shift++; + alloc >>= 1; + } + if (shift < MIN_DESC_SHIFT) + shift = MIN_DESC_SHIFT; + alloc = 1 << shift; + info->alloc = alloc; + } + info->mask = info->alloc - 1; +} + +static void hw_init_desc(struct ksz_desc_info *desc_info, int transmit) +{ + int i; + u32 phys = desc_info->ring_phys; + struct ksz_hw_desc *desc = desc_info->ring_virt; + struct ksz_desc *cur = desc_info->ring; + struct ksz_desc *previous = NULL; + + for (i = 0; i < desc_info->alloc; i++) { + cur->phw = desc++; + phys += desc_info->size; + previous = cur++; + previous->phw->next = cpu_to_le32(phys); + } + previous->phw->next = cpu_to_le32(desc_info->ring_phys); + previous->sw.buf.rx.end_of_ring = 1; + previous->phw->buf.data = cpu_to_le32(previous->sw.buf.data); + + desc_info->avail = desc_info->alloc; + desc_info->last = desc_info->next = 0; + + desc_info->cur = desc_info->ring; +} + +/** + * hw_set_desc_base - set descriptor base addresses + * @hw: The hardware instance. + * @tx_addr: The transmit descriptor base. + * @rx_addr: The receive descriptor base. + * + * This routine programs the descriptor base addresses after reset. + */ +static void hw_set_desc_base(struct ksz_hw *hw, u32 tx_addr, u32 rx_addr) +{ + /* Set base address of Tx/Rx descriptors. */ + writel(tx_addr, hw->io + KS_DMA_TX_ADDR); + writel(rx_addr, hw->io + KS_DMA_RX_ADDR); +} + +static void hw_reset_pkts(struct ksz_desc_info *info) +{ + info->cur = info->ring; + info->avail = info->alloc; + info->last = info->next = 0; +} + +static inline void hw_resume_rx(struct ksz_hw *hw) +{ + writel(DMA_START, hw->io + KS_DMA_RX_START); +} + +/** + * hw_start_rx - start receiving + * @hw: The hardware instance. + * + * This routine starts the receive function of the hardware. + */ +static void hw_start_rx(struct ksz_hw *hw) +{ + writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL); + + /* Notify when the receive stops. */ + hw->intr_mask |= KS884X_INT_RX_STOPPED; + + writel(DMA_START, hw->io + KS_DMA_RX_START); + hw_ack_intr(hw, KS884X_INT_RX_STOPPED); + hw->rx_stop++; + + /* Variable overflows. */ + if (0 == hw->rx_stop) + hw->rx_stop = 2; +} + +/** + * hw_stop_rx - stop receiving + * @hw: The hardware instance. + * + * This routine stops the receive function of the hardware. + */ +static void hw_stop_rx(struct ksz_hw *hw) +{ + hw->rx_stop = 0; + hw_turn_off_intr(hw, KS884X_INT_RX_STOPPED); + writel((hw->rx_cfg & ~DMA_RX_ENABLE), hw->io + KS_DMA_RX_CTRL); +} + +/** + * hw_start_tx - start transmitting + * @hw: The hardware instance. + * + * This routine starts the transmit function of the hardware. + */ +static void hw_start_tx(struct ksz_hw *hw) +{ + writel(hw->tx_cfg, hw->io + KS_DMA_TX_CTRL); +} + +/** + * hw_stop_tx - stop transmitting + * @hw: The hardware instance. + * + * This routine stops the transmit function of the hardware. + */ +static void hw_stop_tx(struct ksz_hw *hw) +{ + writel((hw->tx_cfg & ~DMA_TX_ENABLE), hw->io + KS_DMA_TX_CTRL); +} + +/** + * hw_disable - disable hardware + * @hw: The hardware instance. + * + * This routine disables the hardware. + */ +static void hw_disable(struct ksz_hw *hw) +{ + hw_stop_rx(hw); + hw_stop_tx(hw); + hw->enabled = 0; +} + +/** + * hw_enable - enable hardware + * @hw: The hardware instance. + * + * This routine enables the hardware. + */ +static void hw_enable(struct ksz_hw *hw) +{ + hw_start_tx(hw); + hw_start_rx(hw); + hw->enabled = 1; +} + +/** + * hw_alloc_pkt - allocate enough descriptors for transmission + * @hw: The hardware instance. + * @length: The length of the packet. + * @physical: Number of descriptors required. + * + * This function allocates descriptors for transmission. + * + * Return 0 if not successful; 1 for buffer copy; or number of descriptors. + */ +static int hw_alloc_pkt(struct ksz_hw *hw, int length, int physical) +{ + /* Always leave one descriptor free. */ + if (hw->tx_desc_info.avail <= 1) + return 0; + + /* Allocate a descriptor for transmission and mark it current. */ + get_tx_pkt(&hw->tx_desc_info, &hw->tx_desc_info.cur); + hw->tx_desc_info.cur->sw.buf.tx.first_seg = 1; + + /* Keep track of number of transmit descriptors used so far. */ + ++hw->tx_int_cnt; + hw->tx_size += length; + + /* Cannot hold on too much data. */ + if (hw->tx_size >= MAX_TX_HELD_SIZE) + hw->tx_int_cnt = hw->tx_int_mask + 1; + + if (physical > hw->tx_desc_info.avail) + return 1; + + return hw->tx_desc_info.avail; +} + +/** + * hw_send_pkt - mark packet for transmission + * @hw: The hardware instance. + * + * This routine marks the packet for transmission in PCI version. + */ +static void hw_send_pkt(struct ksz_hw *hw) +{ + struct ksz_desc *cur = hw->tx_desc_info.cur; + + cur->sw.buf.tx.last_seg = 1; + + /* Interrupt only after specified number of descriptors used. */ + if (hw->tx_int_cnt > hw->tx_int_mask) { + cur->sw.buf.tx.intr = 1; + hw->tx_int_cnt = 0; + hw->tx_size = 0; + } + + /* KSZ8842 supports port directed transmission. */ + cur->sw.buf.tx.dest_port = hw->dst_ports; + + release_desc(cur); + + writel(0, hw->io + KS_DMA_TX_START); +} + +static int empty_addr(u8 *addr) +{ + u32 *addr1 = (u32 *) addr; + u16 *addr2 = (u16 *) &addr[4]; + + return 0 == *addr1 && 0 == *addr2; +} + +/** + * hw_set_addr - set MAC address + * @hw: The hardware instance. + * + * This routine programs the MAC address of the hardware when the address is + * overrided. + */ +static void hw_set_addr(struct ksz_hw *hw) +{ + int i; + + for (i = 0; i < ETH_ALEN; i++) + writeb(hw->override_addr[MAC_ADDR_ORDER(i)], + hw->io + KS884X_ADDR_0_OFFSET + i); + + sw_set_addr(hw, hw->override_addr); +} + +/** + * hw_read_addr - read MAC address + * @hw: The hardware instance. + * + * This routine retrieves the MAC address of the hardware. + */ +static void hw_read_addr(struct ksz_hw *hw) +{ + int i; + + for (i = 0; i < ETH_ALEN; i++) + hw->perm_addr[MAC_ADDR_ORDER(i)] = readb(hw->io + + KS884X_ADDR_0_OFFSET + i); + + if (!hw->mac_override) { + memcpy(hw->override_addr, hw->perm_addr, ETH_ALEN); + if (empty_addr(hw->override_addr)) { + memcpy(hw->perm_addr, DEFAULT_MAC_ADDRESS, ETH_ALEN); + memcpy(hw->override_addr, DEFAULT_MAC_ADDRESS, + ETH_ALEN); + hw->override_addr[5] += hw->id; + hw_set_addr(hw); + } + } +} + +static void hw_ena_add_addr(struct ksz_hw *hw, int index, u8 *mac_addr) +{ + int i; + u32 mac_addr_lo; + u32 mac_addr_hi; + + mac_addr_hi = 0; + for (i = 0; i < 2; i++) { + mac_addr_hi <<= 8; + mac_addr_hi |= mac_addr[i]; + } + mac_addr_hi |= ADD_ADDR_ENABLE; + mac_addr_lo = 0; + for (i = 2; i < 6; i++) { + mac_addr_lo <<= 8; + mac_addr_lo |= mac_addr[i]; + } + index *= ADD_ADDR_INCR; + + writel(mac_addr_lo, hw->io + index + KS_ADD_ADDR_0_LO); + writel(mac_addr_hi, hw->io + index + KS_ADD_ADDR_0_HI); +} + +static void hw_set_add_addr(struct ksz_hw *hw) +{ + int i; + + for (i = 0; i < ADDITIONAL_ENTRIES; i++) { + if (empty_addr(hw->address[i])) + writel(0, hw->io + ADD_ADDR_INCR * i + + KS_ADD_ADDR_0_HI); + else + hw_ena_add_addr(hw, i, hw->address[i]); + } +} + +static int hw_add_addr(struct ksz_hw *hw, u8 *mac_addr) +{ + int i; + int j = ADDITIONAL_ENTRIES; + + if (ether_addr_equal(hw->override_addr, mac_addr)) + return 0; + for (i = 0; i < hw->addr_list_size; i++) { + if (ether_addr_equal(hw->address[i], mac_addr)) + return 0; + if (ADDITIONAL_ENTRIES == j && empty_addr(hw->address[i])) + j = i; + } + if (j < ADDITIONAL_ENTRIES) { + memcpy(hw->address[j], mac_addr, ETH_ALEN); + hw_ena_add_addr(hw, j, hw->address[j]); + return 0; + } + return -1; +} + +static int hw_del_addr(struct ksz_hw *hw, u8 *mac_addr) +{ + int i; + + for (i = 0; i < hw->addr_list_size; i++) { + if (ether_addr_equal(hw->address[i], mac_addr)) { + memset(hw->address[i], 0, ETH_ALEN); + writel(0, hw->io + ADD_ADDR_INCR * i + + KS_ADD_ADDR_0_HI); + return 0; + } + } + return -1; +} + +/** + * hw_clr_multicast - clear multicast addresses + * @hw: The hardware instance. + * + * This routine removes all multicast addresses set in the hardware. + */ +static void hw_clr_multicast(struct ksz_hw *hw) +{ + int i; + + for (i = 0; i < HW_MULTICAST_SIZE; i++) { + hw->multi_bits[i] = 0; + + writeb(0, hw->io + KS884X_MULTICAST_0_OFFSET + i); + } +} + +/** + * hw_set_grp_addr - set multicast addresses + * @hw: The hardware instance. + * + * This routine programs multicast addresses for the hardware to accept those + * addresses. + */ +static void hw_set_grp_addr(struct ksz_hw *hw) +{ + int i; + int index; + int position; + int value; + + memset(hw->multi_bits, 0, sizeof(u8) * HW_MULTICAST_SIZE); + + for (i = 0; i < hw->multi_list_size; i++) { + position = (ether_crc(6, hw->multi_list[i]) >> 26) & 0x3f; + index = position >> 3; + value = 1 << (position & 7); + hw->multi_bits[index] |= (u8) value; + } + + for (i = 0; i < HW_MULTICAST_SIZE; i++) + writeb(hw->multi_bits[i], hw->io + KS884X_MULTICAST_0_OFFSET + + i); +} + +/** + * hw_set_multicast - enable or disable all multicast receiving + * @hw: The hardware instance. + * @multicast: To turn on or off the all multicast feature. + * + * This routine enables/disables the hardware to accept all multicast packets. + */ +static void hw_set_multicast(struct ksz_hw *hw, u8 multicast) +{ + /* Stop receiving for reconfiguration. */ + hw_stop_rx(hw); + + if (multicast) + hw->rx_cfg |= DMA_RX_ALL_MULTICAST; + else + hw->rx_cfg &= ~DMA_RX_ALL_MULTICAST; + + if (hw->enabled) + hw_start_rx(hw); +} + +/** + * hw_set_promiscuous - enable or disable promiscuous receiving + * @hw: The hardware instance. + * @prom: To turn on or off the promiscuous feature. + * + * This routine enables/disables the hardware to accept all packets. + */ +static void hw_set_promiscuous(struct ksz_hw *hw, u8 prom) +{ + /* Stop receiving for reconfiguration. */ + hw_stop_rx(hw); + + if (prom) + hw->rx_cfg |= DMA_RX_PROMISCUOUS; + else + hw->rx_cfg &= ~DMA_RX_PROMISCUOUS; + + if (hw->enabled) + hw_start_rx(hw); +} + +/** + * sw_enable - enable the switch + * @hw: The hardware instance. + * @enable: The flag to enable or disable the switch + * + * This routine is used to enable/disable the switch in KSZ8842. + */ +static void sw_enable(struct ksz_hw *hw, int enable) +{ + int port; + + for (port = 0; port < SWITCH_PORT_NUM; port++) { + if (hw->dev_count > 1) { + /* Set port-base vlan membership with host port. */ + sw_cfg_port_base_vlan(hw, port, + HOST_MASK | (1 << port)); + port_set_stp_state(hw, port, STP_STATE_DISABLED); + } else { + sw_cfg_port_base_vlan(hw, port, PORT_MASK); + port_set_stp_state(hw, port, STP_STATE_FORWARDING); + } + } + if (hw->dev_count > 1) + port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_SIMPLE); + else + port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_FORWARDING); + + if (enable) + enable = KS8842_START; + writew(enable, hw->io + KS884X_CHIP_ID_OFFSET); +} + +/** + * sw_setup - setup the switch + * @hw: The hardware instance. + * + * This routine setup the hardware switch engine for default operation. + */ +static void sw_setup(struct ksz_hw *hw) +{ + int port; + + sw_set_global_ctrl(hw); + + /* Enable switch broadcast storm protection at 10% percent rate. */ + sw_init_broad_storm(hw); + hw_cfg_broad_storm(hw, BROADCAST_STORM_PROTECTION_RATE); + for (port = 0; port < SWITCH_PORT_NUM; port++) + sw_ena_broad_storm(hw, port); + + sw_init_prio(hw); + + sw_init_mirror(hw); + + sw_init_prio_rate(hw); + + sw_init_vlan(hw); + + if (hw->features & STP_SUPPORT) + sw_init_stp(hw); + if (!sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_TX_FLOW_CTRL | SWITCH_RX_FLOW_CTRL)) + hw->overrides |= PAUSE_FLOW_CTRL; + sw_enable(hw, 1); +} + +/** + * ksz_start_timer - start kernel timer + * @info: Kernel timer information. + * @time: The time tick. + * + * This routine starts the kernel timer after the specified time tick. + */ +static void ksz_start_timer(struct ksz_timer_info *info, int time) +{ + info->cnt = 0; + info->timer.expires = jiffies + time; + add_timer(&info->timer); + + /* infinity */ + info->max = -1; +} + +/** + * ksz_stop_timer - stop kernel timer + * @info: Kernel timer information. + * + * This routine stops the kernel timer. + */ +static void ksz_stop_timer(struct ksz_timer_info *info) +{ + if (info->max) { + info->max = 0; + del_timer_sync(&info->timer); + } +} + +static void ksz_init_timer(struct ksz_timer_info *info, int period, + void (*function)(unsigned long), void *data) +{ + info->max = 0; + info->period = period; + init_timer(&info->timer); + info->timer.function = function; + info->timer.data = (unsigned long) data; +} + +static void ksz_update_timer(struct ksz_timer_info *info) +{ + ++info->cnt; + if (info->max > 0) { + if (info->cnt < info->max) { + info->timer.expires = jiffies + info->period; + add_timer(&info->timer); + } else + info->max = 0; + } else if (info->max < 0) { + info->timer.expires = jiffies + info->period; + add_timer(&info->timer); + } +} + +/** + * ksz_alloc_soft_desc - allocate software descriptors + * @desc_info: Descriptor information structure. + * @transmit: Indication that descriptors are for transmit. + * + * This local function allocates software descriptors for manipulation in + * memory. + * + * Return 0 if successful. + */ +static int ksz_alloc_soft_desc(struct ksz_desc_info *desc_info, int transmit) +{ + desc_info->ring = kzalloc(sizeof(struct ksz_desc) * desc_info->alloc, + GFP_KERNEL); + if (!desc_info->ring) + return 1; + hw_init_desc(desc_info, transmit); + return 0; +} + +/** + * ksz_alloc_desc - allocate hardware descriptors + * @adapter: Adapter information structure. + * + * This local function allocates hardware descriptors for receiving and + * transmitting. + * + * Return 0 if successful. + */ +static int ksz_alloc_desc(struct dev_info *adapter) +{ + struct ksz_hw *hw = &adapter->hw; + int offset; + + /* Allocate memory for RX & TX descriptors. */ + adapter->desc_pool.alloc_size = + hw->rx_desc_info.size * hw->rx_desc_info.alloc + + hw->tx_desc_info.size * hw->tx_desc_info.alloc + + DESC_ALIGNMENT; + + adapter->desc_pool.alloc_virt = + pci_alloc_consistent( + adapter->pdev, adapter->desc_pool.alloc_size, + &adapter->desc_pool.dma_addr); + if (adapter->desc_pool.alloc_virt == NULL) { + adapter->desc_pool.alloc_size = 0; + return 1; + } + memset(adapter->desc_pool.alloc_virt, 0, adapter->desc_pool.alloc_size); + + /* Align to the next cache line boundary. */ + offset = (((ulong) adapter->desc_pool.alloc_virt % DESC_ALIGNMENT) ? + (DESC_ALIGNMENT - + ((ulong) adapter->desc_pool.alloc_virt % DESC_ALIGNMENT)) : 0); + adapter->desc_pool.virt = adapter->desc_pool.alloc_virt + offset; + adapter->desc_pool.phys = adapter->desc_pool.dma_addr + offset; + + /* Allocate receive/transmit descriptors. */ + hw->rx_desc_info.ring_virt = (struct ksz_hw_desc *) + adapter->desc_pool.virt; + hw->rx_desc_info.ring_phys = adapter->desc_pool.phys; + offset = hw->rx_desc_info.alloc * hw->rx_desc_info.size; + hw->tx_desc_info.ring_virt = (struct ksz_hw_desc *) + (adapter->desc_pool.virt + offset); + hw->tx_desc_info.ring_phys = adapter->desc_pool.phys + offset; + + if (ksz_alloc_soft_desc(&hw->rx_desc_info, 0)) + return 1; + if (ksz_alloc_soft_desc(&hw->tx_desc_info, 1)) + return 1; + + return 0; +} + +/** + * free_dma_buf - release DMA buffer resources + * @adapter: Adapter information structure. + * + * This routine is just a helper function to release the DMA buffer resources. + */ +static void free_dma_buf(struct dev_info *adapter, struct ksz_dma_buf *dma_buf, + int direction) +{ + pci_unmap_single(adapter->pdev, dma_buf->dma, dma_buf->len, direction); + dev_kfree_skb(dma_buf->skb); + dma_buf->skb = NULL; + dma_buf->dma = 0; +} + +/** + * ksz_init_rx_buffers - initialize receive descriptors + * @adapter: Adapter information structure. + * + * This routine initializes DMA buffers for receiving. + */ +static void ksz_init_rx_buffers(struct dev_info *adapter) +{ + int i; + struct ksz_desc *desc; + struct ksz_dma_buf *dma_buf; + struct ksz_hw *hw = &adapter->hw; + struct ksz_desc_info *info = &hw->rx_desc_info; + + for (i = 0; i < hw->rx_desc_info.alloc; i++) { + get_rx_pkt(info, &desc); + + dma_buf = DMA_BUFFER(desc); + if (dma_buf->skb && dma_buf->len != adapter->mtu) + free_dma_buf(adapter, dma_buf, PCI_DMA_FROMDEVICE); + dma_buf->len = adapter->mtu; + if (!dma_buf->skb) + dma_buf->skb = alloc_skb(dma_buf->len, GFP_ATOMIC); + if (dma_buf->skb && !dma_buf->dma) + dma_buf->dma = pci_map_single( + adapter->pdev, + skb_tail_pointer(dma_buf->skb), + dma_buf->len, + PCI_DMA_FROMDEVICE); + + /* Set descriptor. */ + set_rx_buf(desc, dma_buf->dma); + set_rx_len(desc, dma_buf->len); + release_desc(desc); + } +} + +/** + * ksz_alloc_mem - allocate memory for hardware descriptors + * @adapter: Adapter information structure. + * + * This function allocates memory for use by hardware descriptors for receiving + * and transmitting. + * + * Return 0 if successful. + */ +static int ksz_alloc_mem(struct dev_info *adapter) +{ + struct ksz_hw *hw = &adapter->hw; + + /* Determine the number of receive and transmit descriptors. */ + hw->rx_desc_info.alloc = NUM_OF_RX_DESC; + hw->tx_desc_info.alloc = NUM_OF_TX_DESC; + + /* Determine how many descriptors to skip transmit interrupt. */ + hw->tx_int_cnt = 0; + hw->tx_int_mask = NUM_OF_TX_DESC / 4; + if (hw->tx_int_mask > 8) + hw->tx_int_mask = 8; + while (hw->tx_int_mask) { + hw->tx_int_cnt++; + hw->tx_int_mask >>= 1; + } + if (hw->tx_int_cnt) { + hw->tx_int_mask = (1 << (hw->tx_int_cnt - 1)) - 1; + hw->tx_int_cnt = 0; + } + + /* Determine the descriptor size. */ + hw->rx_desc_info.size = + (((sizeof(struct ksz_hw_desc) + DESC_ALIGNMENT - 1) / + DESC_ALIGNMENT) * DESC_ALIGNMENT); + hw->tx_desc_info.size = + (((sizeof(struct ksz_hw_desc) + DESC_ALIGNMENT - 1) / + DESC_ALIGNMENT) * DESC_ALIGNMENT); + if (hw->rx_desc_info.size != sizeof(struct ksz_hw_desc)) + pr_alert("Hardware descriptor size not right!\n"); + ksz_check_desc_num(&hw->rx_desc_info); + ksz_check_desc_num(&hw->tx_desc_info); + + /* Allocate descriptors. */ + if (ksz_alloc_desc(adapter)) + return 1; + + return 0; +} + +/** + * ksz_free_desc - free software and hardware descriptors + * @adapter: Adapter information structure. + * + * This local routine frees the software and hardware descriptors allocated by + * ksz_alloc_desc(). + */ +static void ksz_free_desc(struct dev_info *adapter) +{ + struct ksz_hw *hw = &adapter->hw; + + /* Reset descriptor. */ + hw->rx_desc_info.ring_virt = NULL; + hw->tx_desc_info.ring_virt = NULL; + hw->rx_desc_info.ring_phys = 0; + hw->tx_desc_info.ring_phys = 0; + + /* Free memory. */ + if (adapter->desc_pool.alloc_virt) + pci_free_consistent( + adapter->pdev, + adapter->desc_pool.alloc_size, + adapter->desc_pool.alloc_virt, + adapter->desc_pool.dma_addr); + + /* Reset resource pool. */ + adapter->desc_pool.alloc_size = 0; + adapter->desc_pool.alloc_virt = NULL; + + kfree(hw->rx_desc_info.ring); + hw->rx_desc_info.ring = NULL; + kfree(hw->tx_desc_info.ring); + hw->tx_desc_info.ring = NULL; +} + +/** + * ksz_free_buffers - free buffers used in the descriptors + * @adapter: Adapter information structure. + * @desc_info: Descriptor information structure. + * + * This local routine frees buffers used in the DMA buffers. + */ +static void ksz_free_buffers(struct dev_info *adapter, + struct ksz_desc_info *desc_info, int direction) +{ + int i; + struct ksz_dma_buf *dma_buf; + struct ksz_desc *desc = desc_info->ring; + + for (i = 0; i < desc_info->alloc; i++) { + dma_buf = DMA_BUFFER(desc); + if (dma_buf->skb) + free_dma_buf(adapter, dma_buf, direction); + desc++; + } +} + +/** + * ksz_free_mem - free all resources used by descriptors + * @adapter: Adapter information structure. + * + * This local routine frees all the resources allocated by ksz_alloc_mem(). + */ +static void ksz_free_mem(struct dev_info *adapter) +{ + /* Free transmit buffers. */ + ksz_free_buffers(adapter, &adapter->hw.tx_desc_info, + PCI_DMA_TODEVICE); + + /* Free receive buffers. */ + ksz_free_buffers(adapter, &adapter->hw.rx_desc_info, + PCI_DMA_FROMDEVICE); + + /* Free descriptors. */ + ksz_free_desc(adapter); +} + +static void get_mib_counters(struct ksz_hw *hw, int first, int cnt, + u64 *counter) +{ + int i; + int mib; + int port; + struct ksz_port_mib *port_mib; + + memset(counter, 0, sizeof(u64) * TOTAL_PORT_COUNTER_NUM); + for (i = 0, port = first; i < cnt; i++, port++) { + port_mib = &hw->port_mib[port]; + for (mib = port_mib->mib_start; mib < hw->mib_cnt; mib++) + counter[mib] += port_mib->counter[mib]; + } +} + +/** + * send_packet - send packet + * @skb: Socket buffer. + * @dev: Network device. + * + * This routine is used to send a packet out to the network. + */ +static void send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct ksz_desc *desc; + struct ksz_desc *first; + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_desc_info *info = &hw->tx_desc_info; + struct ksz_dma_buf *dma_buf; + int len; + int last_frag = skb_shinfo(skb)->nr_frags; + + /* + * KSZ8842 with multiple device interfaces needs to be told which port + * to send. + */ + if (hw->dev_count > 1) + hw->dst_ports = 1 << priv->port.first_port; + + /* Hardware will pad the length to 60. */ + len = skb->len; + + /* Remember the very first descriptor. */ + first = info->cur; + desc = first; + + dma_buf = DMA_BUFFER(desc); + if (last_frag) { + int frag; + skb_frag_t *this_frag; + + dma_buf->len = skb_headlen(skb); + + dma_buf->dma = pci_map_single( + hw_priv->pdev, skb->data, dma_buf->len, + PCI_DMA_TODEVICE); + set_tx_buf(desc, dma_buf->dma); + set_tx_len(desc, dma_buf->len); + + frag = 0; + do { + this_frag = &skb_shinfo(skb)->frags[frag]; + + /* Get a new descriptor. */ + get_tx_pkt(info, &desc); + + /* Keep track of descriptors used so far. */ + ++hw->tx_int_cnt; + + dma_buf = DMA_BUFFER(desc); + dma_buf->len = skb_frag_size(this_frag); + + dma_buf->dma = pci_map_single( + hw_priv->pdev, + skb_frag_address(this_frag), + dma_buf->len, + PCI_DMA_TODEVICE); + set_tx_buf(desc, dma_buf->dma); + set_tx_len(desc, dma_buf->len); + + frag++; + if (frag == last_frag) + break; + + /* Do not release the last descriptor here. */ + release_desc(desc); + } while (1); + + /* current points to the last descriptor. */ + info->cur = desc; + + /* Release the first descriptor. */ + release_desc(first); + } else { + dma_buf->len = len; + + dma_buf->dma = pci_map_single( + hw_priv->pdev, skb->data, dma_buf->len, + PCI_DMA_TODEVICE); + set_tx_buf(desc, dma_buf->dma); + set_tx_len(desc, dma_buf->len); + } + + if (skb->ip_summed == CHECKSUM_PARTIAL) { + (desc)->sw.buf.tx.csum_gen_tcp = 1; + (desc)->sw.buf.tx.csum_gen_udp = 1; + } + + /* + * The last descriptor holds the packet so that it can be returned to + * network subsystem after all descriptors are transmitted. + */ + dma_buf->skb = skb; + + hw_send_pkt(hw); + + /* Update transmit statistics. */ + dev->stats.tx_packets++; + dev->stats.tx_bytes += len; +} + +/** + * transmit_cleanup - clean up transmit descriptors + * @dev: Network device. + * + * This routine is called to clean up the transmitted buffers. + */ +static void transmit_cleanup(struct dev_info *hw_priv, int normal) +{ + int last; + union desc_stat status; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_desc_info *info = &hw->tx_desc_info; + struct ksz_desc *desc; + struct ksz_dma_buf *dma_buf; + struct net_device *dev = NULL; + + spin_lock_irq(&hw_priv->hwlock); + last = info->last; + + while (info->avail < info->alloc) { + /* Get next descriptor which is not hardware owned. */ + desc = &info->ring[last]; + status.data = le32_to_cpu(desc->phw->ctrl.data); + if (status.tx.hw_owned) { + if (normal) + break; + else + reset_desc(desc, status); + } + + dma_buf = DMA_BUFFER(desc); + pci_unmap_single( + hw_priv->pdev, dma_buf->dma, dma_buf->len, + PCI_DMA_TODEVICE); + + /* This descriptor contains the last buffer in the packet. */ + if (dma_buf->skb) { + dev = dma_buf->skb->dev; + + /* Release the packet back to network subsystem. */ + dev_kfree_skb_irq(dma_buf->skb); + dma_buf->skb = NULL; + } + + /* Free the transmitted descriptor. */ + last++; + last &= info->mask; + info->avail++; + } + info->last = last; + spin_unlock_irq(&hw_priv->hwlock); + + /* Notify the network subsystem that the packet has been sent. */ + if (dev) + dev->trans_start = jiffies; +} + +/** + * transmit_done - transmit done processing + * @dev: Network device. + * + * This routine is called when the transmit interrupt is triggered, indicating + * either a packet is sent successfully or there are transmit errors. + */ +static void tx_done(struct dev_info *hw_priv) +{ + struct ksz_hw *hw = &hw_priv->hw; + int port; + + transmit_cleanup(hw_priv, 1); + + for (port = 0; port < hw->dev_count; port++) { + struct net_device *dev = hw->port_info[port].pdev; + + if (netif_running(dev) && netif_queue_stopped(dev)) + netif_wake_queue(dev); + } +} + +static inline void copy_old_skb(struct sk_buff *old, struct sk_buff *skb) +{ + skb->dev = old->dev; + skb->protocol = old->protocol; + skb->ip_summed = old->ip_summed; + skb->csum = old->csum; + skb_set_network_header(skb, ETH_HLEN); + + dev_consume_skb_any(old); +} + +/** + * netdev_tx - send out packet + * @skb: Socket buffer. + * @dev: Network device. + * + * This function is used by the upper network layer to send out a packet. + * + * Return 0 if successful; otherwise an error code indicating failure. + */ +static netdev_tx_t netdev_tx(struct sk_buff *skb, struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + int left; + int num = 1; + int rc = 0; + + if (hw->features & SMALL_PACKET_TX_BUG) { + struct sk_buff *org_skb = skb; + + if (skb->len <= 48) { + if (skb_end_pointer(skb) - skb->data >= 50) { + memset(&skb->data[skb->len], 0, 50 - skb->len); + skb->len = 50; + } else { + skb = netdev_alloc_skb(dev, 50); + if (!skb) + return NETDEV_TX_BUSY; + memcpy(skb->data, org_skb->data, org_skb->len); + memset(&skb->data[org_skb->len], 0, + 50 - org_skb->len); + skb->len = 50; + copy_old_skb(org_skb, skb); + } + } + } + + spin_lock_irq(&hw_priv->hwlock); + + num = skb_shinfo(skb)->nr_frags + 1; + left = hw_alloc_pkt(hw, skb->len, num); + if (left) { + if (left < num || + (CHECKSUM_PARTIAL == skb->ip_summed && + skb->protocol == htons(ETH_P_IPV6))) { + struct sk_buff *org_skb = skb; + + skb = netdev_alloc_skb(dev, org_skb->len); + if (!skb) { + rc = NETDEV_TX_BUSY; + goto unlock; + } + skb_copy_and_csum_dev(org_skb, skb->data); + org_skb->ip_summed = CHECKSUM_NONE; + skb->len = org_skb->len; + copy_old_skb(org_skb, skb); + } + send_packet(skb, dev); + if (left <= num) + netif_stop_queue(dev); + } else { + /* Stop the transmit queue until packet is allocated. */ + netif_stop_queue(dev); + rc = NETDEV_TX_BUSY; + } +unlock: + spin_unlock_irq(&hw_priv->hwlock); + + return rc; +} + +/** + * netdev_tx_timeout - transmit timeout processing + * @dev: Network device. + * + * This routine is called when the transmit timer expires. That indicates the + * hardware is not running correctly because transmit interrupts are not + * triggered to free up resources so that the transmit routine can continue + * sending out packets. The hardware is reset to correct the problem. + */ +static void netdev_tx_timeout(struct net_device *dev) +{ + static unsigned long last_reset; + + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + int port; + + if (hw->dev_count > 1) { + /* + * Only reset the hardware if time between calls is long + * enough. + */ + if (time_before_eq(jiffies, last_reset + dev->watchdog_timeo)) + hw_priv = NULL; + } + + last_reset = jiffies; + if (hw_priv) { + hw_dis_intr(hw); + hw_disable(hw); + + transmit_cleanup(hw_priv, 0); + hw_reset_pkts(&hw->rx_desc_info); + hw_reset_pkts(&hw->tx_desc_info); + ksz_init_rx_buffers(hw_priv); + + hw_reset(hw); + + hw_set_desc_base(hw, + hw->tx_desc_info.ring_phys, + hw->rx_desc_info.ring_phys); + hw_set_addr(hw); + if (hw->all_multi) + hw_set_multicast(hw, hw->all_multi); + else if (hw->multi_list_size) + hw_set_grp_addr(hw); + + if (hw->dev_count > 1) { + hw_set_add_addr(hw); + for (port = 0; port < SWITCH_PORT_NUM; port++) { + struct net_device *port_dev; + + port_set_stp_state(hw, port, + STP_STATE_DISABLED); + + port_dev = hw->port_info[port].pdev; + if (netif_running(port_dev)) + port_set_stp_state(hw, port, + STP_STATE_SIMPLE); + } + } + + hw_enable(hw); + hw_ena_intr(hw); + } + + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +static inline void csum_verified(struct sk_buff *skb) +{ + unsigned short protocol; + struct iphdr *iph; + + protocol = skb->protocol; + skb_reset_network_header(skb); + iph = (struct iphdr *) skb_network_header(skb); + if (protocol == htons(ETH_P_8021Q)) { + protocol = iph->tot_len; + skb_set_network_header(skb, VLAN_HLEN); + iph = (struct iphdr *) skb_network_header(skb); + } + if (protocol == htons(ETH_P_IP)) { + if (iph->protocol == IPPROTO_TCP) + skb->ip_summed = CHECKSUM_UNNECESSARY; + } +} + +static inline int rx_proc(struct net_device *dev, struct ksz_hw* hw, + struct ksz_desc *desc, union desc_stat status) +{ + int packet_len; + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_dma_buf *dma_buf; + struct sk_buff *skb; + int rx_status; + + /* Received length includes 4-byte CRC. */ + packet_len = status.rx.frame_len - 4; + + dma_buf = DMA_BUFFER(desc); + pci_dma_sync_single_for_cpu( + hw_priv->pdev, dma_buf->dma, packet_len + 4, + PCI_DMA_FROMDEVICE); + + do { + /* skb->data != skb->head */ + skb = netdev_alloc_skb(dev, packet_len + 2); + if (!skb) { + dev->stats.rx_dropped++; + return -ENOMEM; + } + + /* + * Align socket buffer in 4-byte boundary for better + * performance. + */ + skb_reserve(skb, 2); + + memcpy(skb_put(skb, packet_len), + dma_buf->skb->data, packet_len); + } while (0); + + skb->protocol = eth_type_trans(skb, dev); + + if (hw->rx_cfg & (DMA_RX_CSUM_UDP | DMA_RX_CSUM_TCP)) + csum_verified(skb); + + /* Update receive statistics. */ + dev->stats.rx_packets++; + dev->stats.rx_bytes += packet_len; + + /* Notify upper layer for received packet. */ + rx_status = netif_rx(skb); + + return 0; +} + +static int dev_rcv_packets(struct dev_info *hw_priv) +{ + int next; + union desc_stat status; + struct ksz_hw *hw = &hw_priv->hw; + struct net_device *dev = hw->port_info[0].pdev; + struct ksz_desc_info *info = &hw->rx_desc_info; + int left = info->alloc; + struct ksz_desc *desc; + int received = 0; + + next = info->next; + while (left--) { + /* Get next descriptor which is not hardware owned. */ + desc = &info->ring[next]; + status.data = le32_to_cpu(desc->phw->ctrl.data); + if (status.rx.hw_owned) + break; + + /* Status valid only when last descriptor bit is set. */ + if (status.rx.last_desc && status.rx.first_desc) { + if (rx_proc(dev, hw, desc, status)) + goto release_packet; + received++; + } + +release_packet: + release_desc(desc); + next++; + next &= info->mask; + } + info->next = next; + + return received; +} + +static int port_rcv_packets(struct dev_info *hw_priv) +{ + int next; + union desc_stat status; + struct ksz_hw *hw = &hw_priv->hw; + struct net_device *dev = hw->port_info[0].pdev; + struct ksz_desc_info *info = &hw->rx_desc_info; + int left = info->alloc; + struct ksz_desc *desc; + int received = 0; + + next = info->next; + while (left--) { + /* Get next descriptor which is not hardware owned. */ + desc = &info->ring[next]; + status.data = le32_to_cpu(desc->phw->ctrl.data); + if (status.rx.hw_owned) + break; + + if (hw->dev_count > 1) { + /* Get received port number. */ + int p = HW_TO_DEV_PORT(status.rx.src_port); + + dev = hw->port_info[p].pdev; + if (!netif_running(dev)) + goto release_packet; + } + + /* Status valid only when last descriptor bit is set. */ + if (status.rx.last_desc && status.rx.first_desc) { + if (rx_proc(dev, hw, desc, status)) + goto release_packet; + received++; + } + +release_packet: + release_desc(desc); + next++; + next &= info->mask; + } + info->next = next; + + return received; +} + +static int dev_rcv_special(struct dev_info *hw_priv) +{ + int next; + union desc_stat status; + struct ksz_hw *hw = &hw_priv->hw; + struct net_device *dev = hw->port_info[0].pdev; + struct ksz_desc_info *info = &hw->rx_desc_info; + int left = info->alloc; + struct ksz_desc *desc; + int received = 0; + + next = info->next; + while (left--) { + /* Get next descriptor which is not hardware owned. */ + desc = &info->ring[next]; + status.data = le32_to_cpu(desc->phw->ctrl.data); + if (status.rx.hw_owned) + break; + + if (hw->dev_count > 1) { + /* Get received port number. */ + int p = HW_TO_DEV_PORT(status.rx.src_port); + + dev = hw->port_info[p].pdev; + if (!netif_running(dev)) + goto release_packet; + } + + /* Status valid only when last descriptor bit is set. */ + if (status.rx.last_desc && status.rx.first_desc) { + /* + * Receive without error. With receive errors + * disabled, packets with receive errors will be + * dropped, so no need to check the error bit. + */ + if (!status.rx.error || (status.data & + KS_DESC_RX_ERROR_COND) == + KS_DESC_RX_ERROR_TOO_LONG) { + if (rx_proc(dev, hw, desc, status)) + goto release_packet; + received++; + } else { + struct dev_priv *priv = netdev_priv(dev); + + /* Update receive error statistics. */ + priv->port.counter[OID_COUNTER_RCV_ERROR]++; + } + } + +release_packet: + release_desc(desc); + next++; + next &= info->mask; + } + info->next = next; + + return received; +} + +static void rx_proc_task(unsigned long data) +{ + struct dev_info *hw_priv = (struct dev_info *) data; + struct ksz_hw *hw = &hw_priv->hw; + + if (!hw->enabled) + return; + if (unlikely(!hw_priv->dev_rcv(hw_priv))) { + + /* In case receive process is suspended because of overrun. */ + hw_resume_rx(hw); + + /* tasklets are interruptible. */ + spin_lock_irq(&hw_priv->hwlock); + hw_turn_on_intr(hw, KS884X_INT_RX_MASK); + spin_unlock_irq(&hw_priv->hwlock); + } else { + hw_ack_intr(hw, KS884X_INT_RX); + tasklet_schedule(&hw_priv->rx_tasklet); + } +} + +static void tx_proc_task(unsigned long data) +{ + struct dev_info *hw_priv = (struct dev_info *) data; + struct ksz_hw *hw = &hw_priv->hw; + + hw_ack_intr(hw, KS884X_INT_TX_MASK); + + tx_done(hw_priv); + + /* tasklets are interruptible. */ + spin_lock_irq(&hw_priv->hwlock); + hw_turn_on_intr(hw, KS884X_INT_TX); + spin_unlock_irq(&hw_priv->hwlock); +} + +static inline void handle_rx_stop(struct ksz_hw *hw) +{ + /* Receive just has been stopped. */ + if (0 == hw->rx_stop) + hw->intr_mask &= ~KS884X_INT_RX_STOPPED; + else if (hw->rx_stop > 1) { + if (hw->enabled && (hw->rx_cfg & DMA_RX_ENABLE)) { + hw_start_rx(hw); + } else { + hw->intr_mask &= ~KS884X_INT_RX_STOPPED; + hw->rx_stop = 0; + } + } else + /* Receive just has been started. */ + hw->rx_stop++; +} + +/** + * netdev_intr - interrupt handling + * @irq: Interrupt number. + * @dev_id: Network device. + * + * This function is called by upper network layer to signal interrupt. + * + * Return IRQ_HANDLED if interrupt is handled. + */ +static irqreturn_t netdev_intr(int irq, void *dev_id) +{ + uint int_enable = 0; + struct net_device *dev = (struct net_device *) dev_id; + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + spin_lock(&hw_priv->hwlock); + + hw_read_intr(hw, &int_enable); + + /* Not our interrupt! */ + if (!int_enable) { + spin_unlock(&hw_priv->hwlock); + return IRQ_NONE; + } + + do { + hw_ack_intr(hw, int_enable); + int_enable &= hw->intr_mask; + + if (unlikely(int_enable & KS884X_INT_TX_MASK)) { + hw_dis_intr_bit(hw, KS884X_INT_TX_MASK); + tasklet_schedule(&hw_priv->tx_tasklet); + } + + if (likely(int_enable & KS884X_INT_RX)) { + hw_dis_intr_bit(hw, KS884X_INT_RX); + tasklet_schedule(&hw_priv->rx_tasklet); + } + + if (unlikely(int_enable & KS884X_INT_RX_OVERRUN)) { + dev->stats.rx_fifo_errors++; + hw_resume_rx(hw); + } + + if (unlikely(int_enable & KS884X_INT_PHY)) { + struct ksz_port *port = &priv->port; + + hw->features |= LINK_INT_WORKING; + port_get_link_speed(port); + } + + if (unlikely(int_enable & KS884X_INT_RX_STOPPED)) { + handle_rx_stop(hw); + break; + } + + if (unlikely(int_enable & KS884X_INT_TX_STOPPED)) { + u32 data; + + hw->intr_mask &= ~KS884X_INT_TX_STOPPED; + pr_info("Tx stopped\n"); + data = readl(hw->io + KS_DMA_TX_CTRL); + if (!(data & DMA_TX_ENABLE)) + pr_info("Tx disabled\n"); + break; + } + } while (0); + + hw_ena_intr(hw); + + spin_unlock(&hw_priv->hwlock); + + return IRQ_HANDLED; +} + +/* + * Linux network device functions + */ + +static unsigned long next_jiffies; + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void netdev_netpoll(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + + hw_dis_intr(&hw_priv->hw); + netdev_intr(dev->irq, dev); +} +#endif + +static void bridge_change(struct ksz_hw *hw) +{ + int port; + u8 member; + struct ksz_switch *sw = hw->ksz_switch; + + /* No ports in forwarding state. */ + if (!sw->member) { + port_set_stp_state(hw, SWITCH_PORT_NUM, STP_STATE_SIMPLE); + sw_block_addr(hw); + } + for (port = 0; port < SWITCH_PORT_NUM; port++) { + if (STP_STATE_FORWARDING == sw->port_cfg[port].stp_state) + member = HOST_MASK | sw->member; + else + member = HOST_MASK | (1 << port); + if (member != sw->port_cfg[port].member) + sw_cfg_port_base_vlan(hw, port, member); + } +} + +/** + * netdev_close - close network device + * @dev: Network device. + * + * This function process the close operation of network device. This is caused + * by the user command "ifconfig ethX down." + * + * Return 0 if successful; otherwise an error code indicating failure. + */ +static int netdev_close(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_port *port = &priv->port; + struct ksz_hw *hw = &hw_priv->hw; + int pi; + + netif_stop_queue(dev); + + ksz_stop_timer(&priv->monitor_timer_info); + + /* Need to shut the port manually in multiple device interfaces mode. */ + if (hw->dev_count > 1) { + port_set_stp_state(hw, port->first_port, STP_STATE_DISABLED); + + /* Port is closed. Need to change bridge setting. */ + if (hw->features & STP_SUPPORT) { + pi = 1 << port->first_port; + if (hw->ksz_switch->member & pi) { + hw->ksz_switch->member &= ~pi; + bridge_change(hw); + } + } + } + if (port->first_port > 0) + hw_del_addr(hw, dev->dev_addr); + if (!hw_priv->wol_enable) + port_set_power_saving(port, true); + + if (priv->multicast) + --hw->all_multi; + if (priv->promiscuous) + --hw->promiscuous; + + hw_priv->opened--; + if (!(hw_priv->opened)) { + ksz_stop_timer(&hw_priv->mib_timer_info); + flush_work(&hw_priv->mib_read); + + hw_dis_intr(hw); + hw_disable(hw); + hw_clr_multicast(hw); + + /* Delay for receive task to stop scheduling itself. */ + msleep(2000 / HZ); + + tasklet_kill(&hw_priv->rx_tasklet); + tasklet_kill(&hw_priv->tx_tasklet); + free_irq(dev->irq, hw_priv->dev); + + transmit_cleanup(hw_priv, 0); + hw_reset_pkts(&hw->rx_desc_info); + hw_reset_pkts(&hw->tx_desc_info); + + /* Clean out static MAC table when the switch is shutdown. */ + if (hw->features & STP_SUPPORT) + sw_clr_sta_mac_table(hw); + } + + return 0; +} + +static void hw_cfg_huge_frame(struct dev_info *hw_priv, struct ksz_hw *hw) +{ + if (hw->ksz_switch) { + u32 data; + + data = readw(hw->io + KS8842_SWITCH_CTRL_2_OFFSET); + if (hw->features & RX_HUGE_FRAME) + data |= SWITCH_HUGE_PACKET; + else + data &= ~SWITCH_HUGE_PACKET; + writew(data, hw->io + KS8842_SWITCH_CTRL_2_OFFSET); + } + if (hw->features & RX_HUGE_FRAME) { + hw->rx_cfg |= DMA_RX_ERROR; + hw_priv->dev_rcv = dev_rcv_special; + } else { + hw->rx_cfg &= ~DMA_RX_ERROR; + if (hw->dev_count > 1) + hw_priv->dev_rcv = port_rcv_packets; + else + hw_priv->dev_rcv = dev_rcv_packets; + } +} + +static int prepare_hardware(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + int rc = 0; + + /* Remember the network device that requests interrupts. */ + hw_priv->dev = dev; + rc = request_irq(dev->irq, netdev_intr, IRQF_SHARED, dev->name, dev); + if (rc) + return rc; + tasklet_init(&hw_priv->rx_tasklet, rx_proc_task, + (unsigned long) hw_priv); + tasklet_init(&hw_priv->tx_tasklet, tx_proc_task, + (unsigned long) hw_priv); + + hw->promiscuous = 0; + hw->all_multi = 0; + hw->multi_list_size = 0; + + hw_reset(hw); + + hw_set_desc_base(hw, + hw->tx_desc_info.ring_phys, hw->rx_desc_info.ring_phys); + hw_set_addr(hw); + hw_cfg_huge_frame(hw_priv, hw); + ksz_init_rx_buffers(hw_priv); + return 0; +} + +static void set_media_state(struct net_device *dev, int media_state) +{ + struct dev_priv *priv = netdev_priv(dev); + + if (media_state == priv->media_state) + netif_carrier_on(dev); + else + netif_carrier_off(dev); + netif_info(priv, link, dev, "link %s\n", + media_state == priv->media_state ? "on" : "off"); +} + +/** + * netdev_open - open network device + * @dev: Network device. + * + * This function process the open operation of network device. This is caused + * by the user command "ifconfig ethX up." + * + * Return 0 if successful; otherwise an error code indicating failure. + */ +static int netdev_open(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port *port = &priv->port; + int i; + int p; + int rc = 0; + + priv->multicast = 0; + priv->promiscuous = 0; + + /* Reset device statistics. */ + memset(&dev->stats, 0, sizeof(struct net_device_stats)); + memset((void *) port->counter, 0, + (sizeof(u64) * OID_COUNTER_LAST)); + + if (!(hw_priv->opened)) { + rc = prepare_hardware(dev); + if (rc) + return rc; + for (i = 0; i < hw->mib_port_cnt; i++) { + if (next_jiffies < jiffies) + next_jiffies = jiffies + HZ * 2; + else + next_jiffies += HZ * 1; + hw_priv->counter[i].time = next_jiffies; + hw->port_mib[i].state = media_disconnected; + port_init_cnt(hw, i); + } + if (hw->ksz_switch) + hw->port_mib[HOST_PORT].state = media_connected; + else { + hw_add_wol_bcast(hw); + hw_cfg_wol_pme(hw, 0); + hw_clr_wol_pme_status(&hw_priv->hw); + } + } + port_set_power_saving(port, false); + + for (i = 0, p = port->first_port; i < port->port_cnt; i++, p++) { + /* + * Initialize to invalid value so that link detection + * is done. + */ + hw->port_info[p].partner = 0xFF; + hw->port_info[p].state = media_disconnected; + } + + /* Need to open the port in multiple device interfaces mode. */ + if (hw->dev_count > 1) { + port_set_stp_state(hw, port->first_port, STP_STATE_SIMPLE); + if (port->first_port > 0) + hw_add_addr(hw, dev->dev_addr); + } + + port_get_link_speed(port); + if (port->force_link) + port_force_link_speed(port); + else + port_set_link_speed(port); + + if (!(hw_priv->opened)) { + hw_setup_intr(hw); + hw_enable(hw); + hw_ena_intr(hw); + + if (hw->mib_port_cnt) + ksz_start_timer(&hw_priv->mib_timer_info, + hw_priv->mib_timer_info.period); + } + + hw_priv->opened++; + + ksz_start_timer(&priv->monitor_timer_info, + priv->monitor_timer_info.period); + + priv->media_state = port->linked->state; + + set_media_state(dev, media_connected); + netif_start_queue(dev); + + return 0; +} + +/* RX errors = rx_errors */ +/* RX dropped = rx_dropped */ +/* RX overruns = rx_fifo_errors */ +/* RX frame = rx_crc_errors + rx_frame_errors + rx_length_errors */ +/* TX errors = tx_errors */ +/* TX dropped = tx_dropped */ +/* TX overruns = tx_fifo_errors */ +/* TX carrier = tx_aborted_errors + tx_carrier_errors + tx_window_errors */ +/* collisions = collisions */ + +/** + * netdev_query_statistics - query network device statistics + * @dev: Network device. + * + * This function returns the statistics of the network device. The device + * needs not be opened. + * + * Return network device statistics. + */ +static struct net_device_stats *netdev_query_statistics(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct ksz_port *port = &priv->port; + struct ksz_hw *hw = &priv->adapter->hw; + struct ksz_port_mib *mib; + int i; + int p; + + dev->stats.rx_errors = port->counter[OID_COUNTER_RCV_ERROR]; + dev->stats.tx_errors = port->counter[OID_COUNTER_XMIT_ERROR]; + + /* Reset to zero to add count later. */ + dev->stats.multicast = 0; + dev->stats.collisions = 0; + dev->stats.rx_length_errors = 0; + dev->stats.rx_crc_errors = 0; + dev->stats.rx_frame_errors = 0; + dev->stats.tx_window_errors = 0; + + for (i = 0, p = port->first_port; i < port->mib_port_cnt; i++, p++) { + mib = &hw->port_mib[p]; + + dev->stats.multicast += (unsigned long) + mib->counter[MIB_COUNTER_RX_MULTICAST]; + + dev->stats.collisions += (unsigned long) + mib->counter[MIB_COUNTER_TX_TOTAL_COLLISION]; + + dev->stats.rx_length_errors += (unsigned long)( + mib->counter[MIB_COUNTER_RX_UNDERSIZE] + + mib->counter[MIB_COUNTER_RX_FRAGMENT] + + mib->counter[MIB_COUNTER_RX_OVERSIZE] + + mib->counter[MIB_COUNTER_RX_JABBER]); + dev->stats.rx_crc_errors += (unsigned long) + mib->counter[MIB_COUNTER_RX_CRC_ERR]; + dev->stats.rx_frame_errors += (unsigned long)( + mib->counter[MIB_COUNTER_RX_ALIGNMENT_ERR] + + mib->counter[MIB_COUNTER_RX_SYMBOL_ERR]); + + dev->stats.tx_window_errors += (unsigned long) + mib->counter[MIB_COUNTER_TX_LATE_COLLISION]; + } + + return &dev->stats; +} + +/** + * netdev_set_mac_address - set network device MAC address + * @dev: Network device. + * @addr: Buffer of MAC address. + * + * This function is used to set the MAC address of the network device. + * + * Return 0 to indicate success. + */ +static int netdev_set_mac_address(struct net_device *dev, void *addr) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct sockaddr *mac = addr; + uint interrupt; + + if (priv->port.first_port > 0) + hw_del_addr(hw, dev->dev_addr); + else { + hw->mac_override = 1; + memcpy(hw->override_addr, mac->sa_data, ETH_ALEN); + } + + memcpy(dev->dev_addr, mac->sa_data, ETH_ALEN); + + interrupt = hw_block_intr(hw); + + if (priv->port.first_port > 0) + hw_add_addr(hw, dev->dev_addr); + else + hw_set_addr(hw); + hw_restore_intr(hw, interrupt); + + return 0; +} + +static void dev_set_promiscuous(struct net_device *dev, struct dev_priv *priv, + struct ksz_hw *hw, int promiscuous) +{ + if (promiscuous != priv->promiscuous) { + u8 prev_state = hw->promiscuous; + + if (promiscuous) + ++hw->promiscuous; + else + --hw->promiscuous; + priv->promiscuous = promiscuous; + + /* Turn on/off promiscuous mode. */ + if (hw->promiscuous <= 1 && prev_state <= 1) + hw_set_promiscuous(hw, hw->promiscuous); + + /* + * Port is not in promiscuous mode, meaning it is released + * from the bridge. + */ + if ((hw->features & STP_SUPPORT) && !promiscuous && + (dev->priv_flags & IFF_BRIDGE_PORT)) { + struct ksz_switch *sw = hw->ksz_switch; + int port = priv->port.first_port; + + port_set_stp_state(hw, port, STP_STATE_DISABLED); + port = 1 << port; + if (sw->member & port) { + sw->member &= ~port; + bridge_change(hw); + } + } + } +} + +static void dev_set_multicast(struct dev_priv *priv, struct ksz_hw *hw, + int multicast) +{ + if (multicast != priv->multicast) { + u8 all_multi = hw->all_multi; + + if (multicast) + ++hw->all_multi; + else + --hw->all_multi; + priv->multicast = multicast; + + /* Turn on/off all multicast mode. */ + if (hw->all_multi <= 1 && all_multi <= 1) + hw_set_multicast(hw, hw->all_multi); + } +} + +/** + * netdev_set_rx_mode + * @dev: Network device. + * + * This routine is used to set multicast addresses or put the network device + * into promiscuous mode. + */ +static void netdev_set_rx_mode(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct netdev_hw_addr *ha; + int multicast = (dev->flags & IFF_ALLMULTI); + + dev_set_promiscuous(dev, priv, hw, (dev->flags & IFF_PROMISC)); + + if (hw_priv->hw.dev_count > 1) + multicast |= (dev->flags & IFF_MULTICAST); + dev_set_multicast(priv, hw, multicast); + + /* Cannot use different hashes in multiple device interfaces mode. */ + if (hw_priv->hw.dev_count > 1) + return; + + if ((dev->flags & IFF_MULTICAST) && !netdev_mc_empty(dev)) { + int i = 0; + + /* List too big to support so turn on all multicast mode. */ + if (netdev_mc_count(dev) > MAX_MULTICAST_LIST) { + if (MAX_MULTICAST_LIST != hw->multi_list_size) { + hw->multi_list_size = MAX_MULTICAST_LIST; + ++hw->all_multi; + hw_set_multicast(hw, hw->all_multi); + } + return; + } + + netdev_for_each_mc_addr(ha, dev) { + if (i >= MAX_MULTICAST_LIST) + break; + memcpy(hw->multi_list[i++], ha->addr, ETH_ALEN); + } + hw->multi_list_size = (u8) i; + hw_set_grp_addr(hw); + } else { + if (MAX_MULTICAST_LIST == hw->multi_list_size) { + --hw->all_multi; + hw_set_multicast(hw, hw->all_multi); + } + hw->multi_list_size = 0; + hw_clr_multicast(hw); + } +} + +static int netdev_change_mtu(struct net_device *dev, int new_mtu) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + int hw_mtu; + + if (netif_running(dev)) + return -EBUSY; + + /* Cannot use different MTU in multiple device interfaces mode. */ + if (hw->dev_count > 1) + if (dev != hw_priv->dev) + return 0; + if (new_mtu < 60) + return -EINVAL; + + if (dev->mtu != new_mtu) { + hw_mtu = new_mtu + ETHERNET_HEADER_SIZE + 4; + if (hw_mtu > MAX_RX_BUF_SIZE) + return -EINVAL; + if (hw_mtu > REGULAR_RX_BUF_SIZE) { + hw->features |= RX_HUGE_FRAME; + hw_mtu = MAX_RX_BUF_SIZE; + } else { + hw->features &= ~RX_HUGE_FRAME; + hw_mtu = REGULAR_RX_BUF_SIZE; + } + hw_mtu = (hw_mtu + 3) & ~3; + hw_priv->mtu = hw_mtu; + dev->mtu = new_mtu; + } + return 0; +} + +/** + * netdev_ioctl - I/O control processing + * @dev: Network device. + * @ifr: Interface request structure. + * @cmd: I/O control code. + * + * This function is used to process I/O control calls. + * + * Return 0 to indicate success. + */ +static int netdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port *port = &priv->port; + int result = 0; + struct mii_ioctl_data *data = if_mii(ifr); + + if (down_interruptible(&priv->proc_sem)) + return -ERESTARTSYS; + + switch (cmd) { + /* Get address of MII PHY in use. */ + case SIOCGMIIPHY: + data->phy_id = priv->id; + + /* Fallthrough... */ + + /* Read MII PHY register. */ + case SIOCGMIIREG: + if (data->phy_id != priv->id || data->reg_num >= 6) + result = -EIO; + else + hw_r_phy(hw, port->linked->port_id, data->reg_num, + &data->val_out); + break; + + /* Write MII PHY register. */ + case SIOCSMIIREG: + if (!capable(CAP_NET_ADMIN)) + result = -EPERM; + else if (data->phy_id != priv->id || data->reg_num >= 6) + result = -EIO; + else + hw_w_phy(hw, port->linked->port_id, data->reg_num, + data->val_in); + break; + + default: + result = -EOPNOTSUPP; + } + + up(&priv->proc_sem); + + return result; +} + +/* + * MII support + */ + +/** + * mdio_read - read PHY register + * @dev: Network device. + * @phy_id: The PHY id. + * @reg_num: The register number. + * + * This function returns the PHY register value. + * + * Return the register value. + */ +static int mdio_read(struct net_device *dev, int phy_id, int reg_num) +{ + struct dev_priv *priv = netdev_priv(dev); + struct ksz_port *port = &priv->port; + struct ksz_hw *hw = port->hw; + u16 val_out; + + hw_r_phy(hw, port->linked->port_id, reg_num << 1, &val_out); + return val_out; +} + +/** + * mdio_write - set PHY register + * @dev: Network device. + * @phy_id: The PHY id. + * @reg_num: The register number. + * @val: The register value. + * + * This procedure sets the PHY register value. + */ +static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val) +{ + struct dev_priv *priv = netdev_priv(dev); + struct ksz_port *port = &priv->port; + struct ksz_hw *hw = port->hw; + int i; + int pi; + + for (i = 0, pi = port->first_port; i < port->port_cnt; i++, pi++) + hw_w_phy(hw, pi, reg_num << 1, val); +} + +/* + * ethtool support + */ + +#define EEPROM_SIZE 0x40 + +static u16 eeprom_data[EEPROM_SIZE] = { 0 }; + +#define ADVERTISED_ALL \ + (ADVERTISED_10baseT_Half | \ + ADVERTISED_10baseT_Full | \ + ADVERTISED_100baseT_Half | \ + ADVERTISED_100baseT_Full) + +/* These functions use the MII functions in mii.c. */ + +/** + * netdev_get_settings - get network device settings + * @dev: Network device. + * @cmd: Ethtool command. + * + * This function queries the PHY and returns its state in the ethtool command. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + + mutex_lock(&hw_priv->lock); + mii_ethtool_gset(&priv->mii_if, cmd); + cmd->advertising |= SUPPORTED_TP; + mutex_unlock(&hw_priv->lock); + + /* Save advertised settings for workaround in next function. */ + priv->advertising = cmd->advertising; + return 0; +} + +/** + * netdev_set_settings - set network device settings + * @dev: Network device. + * @cmd: Ethtool command. + * + * This function sets the PHY according to the ethtool command. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_port *port = &priv->port; + u32 speed = ethtool_cmd_speed(cmd); + int rc; + + /* + * ethtool utility does not change advertised setting if auto + * negotiation is not specified explicitly. + */ + if (cmd->autoneg && priv->advertising == cmd->advertising) { + cmd->advertising |= ADVERTISED_ALL; + if (10 == speed) + cmd->advertising &= + ~(ADVERTISED_100baseT_Full | + ADVERTISED_100baseT_Half); + else if (100 == speed) + cmd->advertising &= + ~(ADVERTISED_10baseT_Full | + ADVERTISED_10baseT_Half); + if (0 == cmd->duplex) + cmd->advertising &= + ~(ADVERTISED_100baseT_Full | + ADVERTISED_10baseT_Full); + else if (1 == cmd->duplex) + cmd->advertising &= + ~(ADVERTISED_100baseT_Half | + ADVERTISED_10baseT_Half); + } + mutex_lock(&hw_priv->lock); + if (cmd->autoneg && + (cmd->advertising & ADVERTISED_ALL) == + ADVERTISED_ALL) { + port->duplex = 0; + port->speed = 0; + port->force_link = 0; + } else { + port->duplex = cmd->duplex + 1; + if (1000 != speed) + port->speed = speed; + if (cmd->autoneg) + port->force_link = 0; + else + port->force_link = 1; + } + rc = mii_ethtool_sset(&priv->mii_if, cmd); + mutex_unlock(&hw_priv->lock); + return rc; +} + +/** + * netdev_nway_reset - restart auto-negotiation + * @dev: Network device. + * + * This function restarts the PHY for auto-negotiation. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_nway_reset(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + int rc; + + mutex_lock(&hw_priv->lock); + rc = mii_nway_restart(&priv->mii_if); + mutex_unlock(&hw_priv->lock); + return rc; +} + +/** + * netdev_get_link - get network device link status + * @dev: Network device. + * + * This function gets the link status from the PHY. + * + * Return true if PHY is linked and false otherwise. + */ +static u32 netdev_get_link(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + int rc; + + rc = mii_link_ok(&priv->mii_if); + return rc; +} + +/** + * netdev_get_drvinfo - get network driver information + * @dev: Network device. + * @info: Ethtool driver info data structure. + * + * This procedure returns the driver information. + */ +static void netdev_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + + strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); + strlcpy(info->version, DRV_VERSION, sizeof(info->version)); + strlcpy(info->bus_info, pci_name(hw_priv->pdev), + sizeof(info->bus_info)); +} + +/** + * netdev_get_regs_len - get length of register dump + * @dev: Network device. + * + * This function returns the length of the register dump. + * + * Return length of the register dump. + */ +static struct hw_regs { + int start; + int end; +} hw_regs_range[] = { + { KS_DMA_TX_CTRL, KS884X_INTERRUPTS_STATUS }, + { KS_ADD_ADDR_0_LO, KS_ADD_ADDR_F_HI }, + { KS884X_ADDR_0_OFFSET, KS8841_WOL_FRAME_BYTE2_OFFSET }, + { KS884X_SIDER_P, KS8842_SGCR7_P }, + { KS8842_MACAR1_P, KS8842_TOSR8_P }, + { KS884X_P1MBCR_P, KS8842_P3ERCR_P }, + { 0, 0 } +}; + +static int netdev_get_regs_len(struct net_device *dev) +{ + struct hw_regs *range = hw_regs_range; + int regs_len = 0x10 * sizeof(u32); + + while (range->end > range->start) { + regs_len += (range->end - range->start + 3) / 4 * 4; + range++; + } + return regs_len; +} + +/** + * netdev_get_regs - get register dump + * @dev: Network device. + * @regs: Ethtool registers data structure. + * @ptr: Buffer to store the register values. + * + * This procedure dumps the register values in the provided buffer. + */ +static void netdev_get_regs(struct net_device *dev, struct ethtool_regs *regs, + void *ptr) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + int *buf = (int *) ptr; + struct hw_regs *range = hw_regs_range; + int len; + + mutex_lock(&hw_priv->lock); + regs->version = 0; + for (len = 0; len < 0x40; len += 4) { + pci_read_config_dword(hw_priv->pdev, len, buf); + buf++; + } + while (range->end > range->start) { + for (len = range->start; len < range->end; len += 4) { + *buf = readl(hw->io + len); + buf++; + } + range++; + } + mutex_unlock(&hw_priv->lock); +} + +#define WOL_SUPPORT \ + (WAKE_PHY | WAKE_MAGIC | \ + WAKE_UCAST | WAKE_MCAST | \ + WAKE_BCAST | WAKE_ARP) + +/** + * netdev_get_wol - get Wake-on-LAN support + * @dev: Network device. + * @wol: Ethtool Wake-on-LAN data structure. + * + * This procedure returns Wake-on-LAN support. + */ +static void netdev_get_wol(struct net_device *dev, + struct ethtool_wolinfo *wol) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + + wol->supported = hw_priv->wol_support; + wol->wolopts = hw_priv->wol_enable; + memset(&wol->sopass, 0, sizeof(wol->sopass)); +} + +/** + * netdev_set_wol - set Wake-on-LAN support + * @dev: Network device. + * @wol: Ethtool Wake-on-LAN data structure. + * + * This function sets Wake-on-LAN support. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_set_wol(struct net_device *dev, + struct ethtool_wolinfo *wol) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + + /* Need to find a way to retrieve the device IP address. */ + static const u8 net_addr[] = { 192, 168, 1, 1 }; + + if (wol->wolopts & ~hw_priv->wol_support) + return -EINVAL; + + hw_priv->wol_enable = wol->wolopts; + + /* Link wakeup cannot really be disabled. */ + if (wol->wolopts) + hw_priv->wol_enable |= WAKE_PHY; + hw_enable_wol(&hw_priv->hw, hw_priv->wol_enable, net_addr); + return 0; +} + +/** + * netdev_get_msglevel - get debug message level + * @dev: Network device. + * + * This function returns current debug message level. + * + * Return current debug message flags. + */ +static u32 netdev_get_msglevel(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + + return priv->msg_enable; +} + +/** + * netdev_set_msglevel - set debug message level + * @dev: Network device. + * @value: Debug message flags. + * + * This procedure sets debug message level. + */ +static void netdev_set_msglevel(struct net_device *dev, u32 value) +{ + struct dev_priv *priv = netdev_priv(dev); + + priv->msg_enable = value; +} + +/** + * netdev_get_eeprom_len - get EEPROM length + * @dev: Network device. + * + * This function returns the length of the EEPROM. + * + * Return length of the EEPROM. + */ +static int netdev_get_eeprom_len(struct net_device *dev) +{ + return EEPROM_SIZE * 2; +} + +/** + * netdev_get_eeprom - get EEPROM data + * @dev: Network device. + * @eeprom: Ethtool EEPROM data structure. + * @data: Buffer to store the EEPROM data. + * + * This function dumps the EEPROM data in the provided buffer. + * + * Return 0 if successful; otherwise an error code. + */ +#define EEPROM_MAGIC 0x10A18842 + +static int netdev_get_eeprom(struct net_device *dev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + u8 *eeprom_byte = (u8 *) eeprom_data; + int i; + int len; + + len = (eeprom->offset + eeprom->len + 1) / 2; + for (i = eeprom->offset / 2; i < len; i++) + eeprom_data[i] = eeprom_read(&hw_priv->hw, i); + eeprom->magic = EEPROM_MAGIC; + memcpy(data, &eeprom_byte[eeprom->offset], eeprom->len); + + return 0; +} + +/** + * netdev_set_eeprom - write EEPROM data + * @dev: Network device. + * @eeprom: Ethtool EEPROM data structure. + * @data: Data buffer. + * + * This function modifies the EEPROM data one byte at a time. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_set_eeprom(struct net_device *dev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + u16 eeprom_word[EEPROM_SIZE]; + u8 *eeprom_byte = (u8 *) eeprom_word; + int i; + int len; + + if (eeprom->magic != EEPROM_MAGIC) + return -EINVAL; + + len = (eeprom->offset + eeprom->len + 1) / 2; + for (i = eeprom->offset / 2; i < len; i++) + eeprom_data[i] = eeprom_read(&hw_priv->hw, i); + memcpy(eeprom_word, eeprom_data, EEPROM_SIZE * 2); + memcpy(&eeprom_byte[eeprom->offset], data, eeprom->len); + for (i = 0; i < EEPROM_SIZE; i++) + if (eeprom_word[i] != eeprom_data[i]) { + eeprom_data[i] = eeprom_word[i]; + eeprom_write(&hw_priv->hw, i, eeprom_data[i]); + } + + return 0; +} + +/** + * netdev_get_pauseparam - get flow control parameters + * @dev: Network device. + * @pause: Ethtool PAUSE settings data structure. + * + * This procedure returns the PAUSE control flow settings. + */ +static void netdev_get_pauseparam(struct net_device *dev, + struct ethtool_pauseparam *pause) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + pause->autoneg = (hw->overrides & PAUSE_FLOW_CTRL) ? 0 : 1; + if (!hw->ksz_switch) { + pause->rx_pause = + (hw->rx_cfg & DMA_RX_FLOW_ENABLE) ? 1 : 0; + pause->tx_pause = + (hw->tx_cfg & DMA_TX_FLOW_ENABLE) ? 1 : 0; + } else { + pause->rx_pause = + (sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_RX_FLOW_CTRL)) ? 1 : 0; + pause->tx_pause = + (sw_chk(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_TX_FLOW_CTRL)) ? 1 : 0; + } +} + +/** + * netdev_set_pauseparam - set flow control parameters + * @dev: Network device. + * @pause: Ethtool PAUSE settings data structure. + * + * This function sets the PAUSE control flow settings. + * Not implemented yet. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_set_pauseparam(struct net_device *dev, + struct ethtool_pauseparam *pause) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port *port = &priv->port; + + mutex_lock(&hw_priv->lock); + if (pause->autoneg) { + if (!pause->rx_pause && !pause->tx_pause) + port->flow_ctrl = PHY_NO_FLOW_CTRL; + else + port->flow_ctrl = PHY_FLOW_CTRL; + hw->overrides &= ~PAUSE_FLOW_CTRL; + port->force_link = 0; + if (hw->ksz_switch) { + sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_RX_FLOW_CTRL, 1); + sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_TX_FLOW_CTRL, 1); + } + port_set_link_speed(port); + } else { + hw->overrides |= PAUSE_FLOW_CTRL; + if (hw->ksz_switch) { + sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_RX_FLOW_CTRL, pause->rx_pause); + sw_cfg(hw, KS8842_SWITCH_CTRL_1_OFFSET, + SWITCH_TX_FLOW_CTRL, pause->tx_pause); + } else + set_flow_ctrl(hw, pause->rx_pause, pause->tx_pause); + } + mutex_unlock(&hw_priv->lock); + + return 0; +} + +/** + * netdev_get_ringparam - get tx/rx ring parameters + * @dev: Network device. + * @pause: Ethtool RING settings data structure. + * + * This procedure returns the TX/RX ring settings. + */ +static void netdev_get_ringparam(struct net_device *dev, + struct ethtool_ringparam *ring) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + ring->tx_max_pending = (1 << 9); + ring->tx_pending = hw->tx_desc_info.alloc; + ring->rx_max_pending = (1 << 9); + ring->rx_pending = hw->rx_desc_info.alloc; +} + +#define STATS_LEN (TOTAL_PORT_COUNTER_NUM) + +static struct { + char string[ETH_GSTRING_LEN]; +} ethtool_stats_keys[STATS_LEN] = { + { "rx_lo_priority_octets" }, + { "rx_hi_priority_octets" }, + { "rx_undersize_packets" }, + { "rx_fragments" }, + { "rx_oversize_packets" }, + { "rx_jabbers" }, + { "rx_symbol_errors" }, + { "rx_crc_errors" }, + { "rx_align_errors" }, + { "rx_mac_ctrl_packets" }, + { "rx_pause_packets" }, + { "rx_bcast_packets" }, + { "rx_mcast_packets" }, + { "rx_ucast_packets" }, + { "rx_64_or_less_octet_packets" }, + { "rx_65_to_127_octet_packets" }, + { "rx_128_to_255_octet_packets" }, + { "rx_256_to_511_octet_packets" }, + { "rx_512_to_1023_octet_packets" }, + { "rx_1024_to_1522_octet_packets" }, + + { "tx_lo_priority_octets" }, + { "tx_hi_priority_octets" }, + { "tx_late_collisions" }, + { "tx_pause_packets" }, + { "tx_bcast_packets" }, + { "tx_mcast_packets" }, + { "tx_ucast_packets" }, + { "tx_deferred" }, + { "tx_total_collisions" }, + { "tx_excessive_collisions" }, + { "tx_single_collisions" }, + { "tx_mult_collisions" }, + + { "rx_discards" }, + { "tx_discards" }, +}; + +/** + * netdev_get_strings - get statistics identity strings + * @dev: Network device. + * @stringset: String set identifier. + * @buf: Buffer to store the strings. + * + * This procedure returns the strings used to identify the statistics. + */ +static void netdev_get_strings(struct net_device *dev, u32 stringset, u8 *buf) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + if (ETH_SS_STATS == stringset) + memcpy(buf, ðtool_stats_keys, + ETH_GSTRING_LEN * hw->mib_cnt); +} + +/** + * netdev_get_sset_count - get statistics size + * @dev: Network device. + * @sset: The statistics set number. + * + * This function returns the size of the statistics to be reported. + * + * Return size of the statistics to be reported. + */ +static int netdev_get_sset_count(struct net_device *dev, int sset) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + switch (sset) { + case ETH_SS_STATS: + return hw->mib_cnt; + default: + return -EOPNOTSUPP; + } +} + +/** + * netdev_get_ethtool_stats - get network device statistics + * @dev: Network device. + * @stats: Ethtool statistics data structure. + * @data: Buffer to store the statistics. + * + * This procedure returns the statistics. + */ +static void netdev_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port *port = &priv->port; + int n_stats = stats->n_stats; + int i; + int n; + int p; + int rc; + u64 counter[TOTAL_PORT_COUNTER_NUM]; + + mutex_lock(&hw_priv->lock); + n = SWITCH_PORT_NUM; + for (i = 0, p = port->first_port; i < port->mib_port_cnt; i++, p++) { + if (media_connected == hw->port_mib[p].state) { + hw_priv->counter[p].read = 1; + + /* Remember first port that requests read. */ + if (n == SWITCH_PORT_NUM) + n = p; + } + } + mutex_unlock(&hw_priv->lock); + + if (n < SWITCH_PORT_NUM) + schedule_work(&hw_priv->mib_read); + + if (1 == port->mib_port_cnt && n < SWITCH_PORT_NUM) { + p = n; + rc = wait_event_interruptible_timeout( + hw_priv->counter[p].counter, + 2 == hw_priv->counter[p].read, + HZ * 1); + } else + for (i = 0, p = n; i < port->mib_port_cnt - n; i++, p++) { + if (0 == i) { + rc = wait_event_interruptible_timeout( + hw_priv->counter[p].counter, + 2 == hw_priv->counter[p].read, + HZ * 2); + } else if (hw->port_mib[p].cnt_ptr) { + rc = wait_event_interruptible_timeout( + hw_priv->counter[p].counter, + 2 == hw_priv->counter[p].read, + HZ * 1); + } + } + + get_mib_counters(hw, port->first_port, port->mib_port_cnt, counter); + n = hw->mib_cnt; + if (n > n_stats) + n = n_stats; + n_stats -= n; + for (i = 0; i < n; i++) + *data++ = counter[i]; +} + +/** + * netdev_set_features - set receive checksum support + * @dev: Network device. + * @features: New device features (offloads). + * + * This function sets receive checksum support setting. + * + * Return 0 if successful; otherwise an error code. + */ +static int netdev_set_features(struct net_device *dev, + netdev_features_t features) +{ + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + + mutex_lock(&hw_priv->lock); + + /* see note in hw_setup() */ + if (features & NETIF_F_RXCSUM) + hw->rx_cfg |= DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP; + else + hw->rx_cfg &= ~(DMA_RX_CSUM_TCP | DMA_RX_CSUM_IP); + + if (hw->enabled) + writel(hw->rx_cfg, hw->io + KS_DMA_RX_CTRL); + + mutex_unlock(&hw_priv->lock); + + return 0; +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_settings = netdev_get_settings, + .set_settings = netdev_set_settings, + .nway_reset = netdev_nway_reset, + .get_link = netdev_get_link, + .get_drvinfo = netdev_get_drvinfo, + .get_regs_len = netdev_get_regs_len, + .get_regs = netdev_get_regs, + .get_wol = netdev_get_wol, + .set_wol = netdev_set_wol, + .get_msglevel = netdev_get_msglevel, + .set_msglevel = netdev_set_msglevel, + .get_eeprom_len = netdev_get_eeprom_len, + .get_eeprom = netdev_get_eeprom, + .set_eeprom = netdev_set_eeprom, + .get_pauseparam = netdev_get_pauseparam, + .set_pauseparam = netdev_set_pauseparam, + .get_ringparam = netdev_get_ringparam, + .get_strings = netdev_get_strings, + .get_sset_count = netdev_get_sset_count, + .get_ethtool_stats = netdev_get_ethtool_stats, +}; + +/* + * Hardware monitoring + */ + +static void update_link(struct net_device *dev, struct dev_priv *priv, + struct ksz_port *port) +{ + if (priv->media_state != port->linked->state) { + priv->media_state = port->linked->state; + if (netif_running(dev)) + set_media_state(dev, media_connected); + } +} + +static void mib_read_work(struct work_struct *work) +{ + struct dev_info *hw_priv = + container_of(work, struct dev_info, mib_read); + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port_mib *mib; + int i; + + next_jiffies = jiffies; + for (i = 0; i < hw->mib_port_cnt; i++) { + mib = &hw->port_mib[i]; + + /* Reading MIB counters or requested to read. */ + if (mib->cnt_ptr || 1 == hw_priv->counter[i].read) { + + /* Need to process receive interrupt. */ + if (port_r_cnt(hw, i)) + break; + hw_priv->counter[i].read = 0; + + /* Finish reading counters. */ + if (0 == mib->cnt_ptr) { + hw_priv->counter[i].read = 2; + wake_up_interruptible( + &hw_priv->counter[i].counter); + } + } else if (jiffies >= hw_priv->counter[i].time) { + /* Only read MIB counters when the port is connected. */ + if (media_connected == mib->state) + hw_priv->counter[i].read = 1; + next_jiffies += HZ * 1 * hw->mib_port_cnt; + hw_priv->counter[i].time = next_jiffies; + + /* Port is just disconnected. */ + } else if (mib->link_down) { + mib->link_down = 0; + + /* Read counters one last time after link is lost. */ + hw_priv->counter[i].read = 1; + } + } +} + +static void mib_monitor(unsigned long ptr) +{ + struct dev_info *hw_priv = (struct dev_info *) ptr; + + mib_read_work(&hw_priv->mib_read); + + /* This is used to verify Wake-on-LAN is working. */ + if (hw_priv->pme_wait) { + if (hw_priv->pme_wait <= jiffies) { + hw_clr_wol_pme_status(&hw_priv->hw); + hw_priv->pme_wait = 0; + } + } else if (hw_chk_wol_pme_status(&hw_priv->hw)) { + + /* PME is asserted. Wait 2 seconds to clear it. */ + hw_priv->pme_wait = jiffies + HZ * 2; + } + + ksz_update_timer(&hw_priv->mib_timer_info); +} + +/** + * dev_monitor - periodic monitoring + * @ptr: Network device pointer. + * + * This routine is run in a kernel timer to monitor the network device. + */ +static void dev_monitor(unsigned long ptr) +{ + struct net_device *dev = (struct net_device *) ptr; + struct dev_priv *priv = netdev_priv(dev); + struct dev_info *hw_priv = priv->adapter; + struct ksz_hw *hw = &hw_priv->hw; + struct ksz_port *port = &priv->port; + + if (!(hw->features & LINK_INT_WORKING)) + port_get_link_speed(port); + update_link(dev, priv, port); + + ksz_update_timer(&priv->monitor_timer_info); +} + +/* + * Linux network device interface functions + */ + +/* Driver exported variables */ + +static int msg_enable; + +static char *macaddr = ":"; +static char *mac1addr = ":"; + +/* + * This enables multiple network device mode for KSZ8842, which contains a + * switch with two physical ports. Some users like to take control of the + * ports for running Spanning Tree Protocol. The driver will create an + * additional eth? device for the other port. + * + * Some limitations are the network devices cannot have different MTU and + * multicast hash tables. + */ +static int multi_dev; + +/* + * As most users select multiple network device mode to use Spanning Tree + * Protocol, this enables a feature in which most unicast and multicast packets + * are forwarded inside the switch and not passed to the host. Only packets + * that need the host's attention are passed to it. This prevents the host + * wasting CPU time to examine each and every incoming packets and do the + * forwarding itself. + * + * As the hack requires the private bridge header, the driver cannot compile + * with just the kernel headers. + * + * Enabling STP support also turns on multiple network device mode. + */ +static int stp; + +/* + * This enables fast aging in the KSZ8842 switch. Not sure what situation + * needs that. However, fast aging is used to flush the dynamic MAC table when + * STP support is enabled. + */ +static int fast_aging; + +/** + * netdev_init - initialize network device. + * @dev: Network device. + * + * This function initializes the network device. + * + * Return 0 if successful; otherwise an error code indicating failure. + */ +static int __init netdev_init(struct net_device *dev) +{ + struct dev_priv *priv = netdev_priv(dev); + + /* 500 ms timeout */ + ksz_init_timer(&priv->monitor_timer_info, 500 * HZ / 1000, + dev_monitor, dev); + + /* 500 ms timeout */ + dev->watchdog_timeo = HZ / 2; + + dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_RXCSUM; + + /* + * Hardware does not really support IPv6 checksum generation, but + * driver actually runs faster with this on. + */ + dev->hw_features |= NETIF_F_IPV6_CSUM; + + dev->features |= dev->hw_features; + + sema_init(&priv->proc_sem, 1); + + priv->mii_if.phy_id_mask = 0x1; + priv->mii_if.reg_num_mask = 0x7; + priv->mii_if.dev = dev; + priv->mii_if.mdio_read = mdio_read; + priv->mii_if.mdio_write = mdio_write; + priv->mii_if.phy_id = priv->port.first_port + 1; + + priv->msg_enable = netif_msg_init(msg_enable, + (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)); + + return 0; +} + +static const struct net_device_ops netdev_ops = { + .ndo_init = netdev_init, + .ndo_open = netdev_open, + .ndo_stop = netdev_close, + .ndo_get_stats = netdev_query_statistics, + .ndo_start_xmit = netdev_tx, + .ndo_tx_timeout = netdev_tx_timeout, + .ndo_change_mtu = netdev_change_mtu, + .ndo_set_features = netdev_set_features, + .ndo_set_mac_address = netdev_set_mac_address, + .ndo_validate_addr = eth_validate_addr, + .ndo_do_ioctl = netdev_ioctl, + .ndo_set_rx_mode = netdev_set_rx_mode, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = netdev_netpoll, +#endif +}; + +static void netdev_free(struct net_device *dev) +{ + if (dev->watchdog_timeo) + unregister_netdev(dev); + + free_netdev(dev); +} + +struct platform_info { + struct dev_info dev_info; + struct net_device *netdev[SWITCH_PORT_NUM]; +}; + +static int net_device_present; + +static void get_mac_addr(struct dev_info *hw_priv, u8 *macaddr, int port) +{ + int i; + int j; + int got_num; + int num; + + i = j = num = got_num = 0; + while (j < ETH_ALEN) { + if (macaddr[i]) { + int digit; + + got_num = 1; + digit = hex_to_bin(macaddr[i]); + if (digit >= 0) + num = num * 16 + digit; + else if (':' == macaddr[i]) + got_num = 2; + else + break; + } else if (got_num) + got_num = 2; + else + break; + if (2 == got_num) { + if (MAIN_PORT == port) { + hw_priv->hw.override_addr[j++] = (u8) num; + hw_priv->hw.override_addr[5] += + hw_priv->hw.id; + } else { + hw_priv->hw.ksz_switch->other_addr[j++] = + (u8) num; + hw_priv->hw.ksz_switch->other_addr[5] += + hw_priv->hw.id; + } + num = got_num = 0; + } + i++; + } + if (ETH_ALEN == j) { + if (MAIN_PORT == port) + hw_priv->hw.mac_override = 1; + } +} + +#define KS884X_DMA_MASK (~0x0UL) + +static void read_other_addr(struct ksz_hw *hw) +{ + int i; + u16 data[3]; + struct ksz_switch *sw = hw->ksz_switch; + + for (i = 0; i < 3; i++) + data[i] = eeprom_read(hw, i + EEPROM_DATA_OTHER_MAC_ADDR); + if ((data[0] || data[1] || data[2]) && data[0] != 0xffff) { + sw->other_addr[5] = (u8) data[0]; + sw->other_addr[4] = (u8)(data[0] >> 8); + sw->other_addr[3] = (u8) data[1]; + sw->other_addr[2] = (u8)(data[1] >> 8); + sw->other_addr[1] = (u8) data[2]; + sw->other_addr[0] = (u8)(data[2] >> 8); + } +} + +#ifndef PCI_VENDOR_ID_MICREL_KS +#define PCI_VENDOR_ID_MICREL_KS 0x16c6 +#endif + +static int pcidev_init(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct net_device *dev; + struct dev_priv *priv; + struct dev_info *hw_priv; + struct ksz_hw *hw; + struct platform_info *info; + struct ksz_port *port; + unsigned long reg_base; + unsigned long reg_len; + int cnt; + int i; + int mib_port_count; + int pi; + int port_count; + int result; + char banner[sizeof(version)]; + struct ksz_switch *sw = NULL; + + result = pci_enable_device(pdev); + if (result) + return result; + + result = -ENODEV; + + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) || + pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) + return result; + + reg_base = pci_resource_start(pdev, 0); + reg_len = pci_resource_len(pdev, 0); + if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) + return result; + + if (!request_mem_region(reg_base, reg_len, DRV_NAME)) + return result; + pci_set_master(pdev); + + result = -ENOMEM; + + info = kzalloc(sizeof(struct platform_info), GFP_KERNEL); + if (!info) + goto pcidev_init_dev_err; + + hw_priv = &info->dev_info; + hw_priv->pdev = pdev; + + hw = &hw_priv->hw; + + hw->io = ioremap(reg_base, reg_len); + if (!hw->io) + goto pcidev_init_io_err; + + cnt = hw_init(hw); + if (!cnt) { + if (msg_enable & NETIF_MSG_PROBE) + pr_alert("chip not detected\n"); + result = -ENODEV; + goto pcidev_init_alloc_err; + } + + snprintf(banner, sizeof(banner), "%s", version); + banner[13] = cnt + '0'; /* Replace x in "Micrel KSZ884x" */ + dev_info(&hw_priv->pdev->dev, "%s\n", banner); + dev_dbg(&hw_priv->pdev->dev, "Mem = %p; IRQ = %d\n", hw->io, pdev->irq); + + /* Assume device is KSZ8841. */ + hw->dev_count = 1; + port_count = 1; + mib_port_count = 1; + hw->addr_list_size = 0; + hw->mib_cnt = PORT_COUNTER_NUM; + hw->mib_port_cnt = 1; + + /* KSZ8842 has a switch with multiple ports. */ + if (2 == cnt) { + if (fast_aging) + hw->overrides |= FAST_AGING; + + hw->mib_cnt = TOTAL_PORT_COUNTER_NUM; + + /* Multiple network device interfaces are required. */ + if (multi_dev) { + hw->dev_count = SWITCH_PORT_NUM; + hw->addr_list_size = SWITCH_PORT_NUM - 1; + } + + /* Single network device has multiple ports. */ + if (1 == hw->dev_count) { + port_count = SWITCH_PORT_NUM; + mib_port_count = SWITCH_PORT_NUM; + } + hw->mib_port_cnt = TOTAL_PORT_NUM; + hw->ksz_switch = kzalloc(sizeof(struct ksz_switch), GFP_KERNEL); + if (!hw->ksz_switch) + goto pcidev_init_alloc_err; + + sw = hw->ksz_switch; + } + for (i = 0; i < hw->mib_port_cnt; i++) + hw->port_mib[i].mib_start = 0; + + hw->parent = hw_priv; + + /* Default MTU is 1500. */ + hw_priv->mtu = (REGULAR_RX_BUF_SIZE + 3) & ~3; + + if (ksz_alloc_mem(hw_priv)) + goto pcidev_init_mem_err; + + hw_priv->hw.id = net_device_present; + + spin_lock_init(&hw_priv->hwlock); + mutex_init(&hw_priv->lock); + + for (i = 0; i < TOTAL_PORT_NUM; i++) + init_waitqueue_head(&hw_priv->counter[i].counter); + + if (macaddr[0] != ':') + get_mac_addr(hw_priv, macaddr, MAIN_PORT); + + /* Read MAC address and initialize override address if not overrided. */ + hw_read_addr(hw); + + /* Multiple device interfaces mode requires a second MAC address. */ + if (hw->dev_count > 1) { + memcpy(sw->other_addr, hw->override_addr, ETH_ALEN); + read_other_addr(hw); + if (mac1addr[0] != ':') + get_mac_addr(hw_priv, mac1addr, OTHER_PORT); + } + + hw_setup(hw); + if (hw->ksz_switch) + sw_setup(hw); + else { + hw_priv->wol_support = WOL_SUPPORT; + hw_priv->wol_enable = 0; + } + + INIT_WORK(&hw_priv->mib_read, mib_read_work); + + /* 500 ms timeout */ + ksz_init_timer(&hw_priv->mib_timer_info, 500 * HZ / 1000, + mib_monitor, hw_priv); + + for (i = 0; i < hw->dev_count; i++) { + dev = alloc_etherdev(sizeof(struct dev_priv)); + if (!dev) + goto pcidev_init_reg_err; + SET_NETDEV_DEV(dev, &pdev->dev); + info->netdev[i] = dev; + + priv = netdev_priv(dev); + priv->adapter = hw_priv; + priv->id = net_device_present++; + + port = &priv->port; + port->port_cnt = port_count; + port->mib_port_cnt = mib_port_count; + port->first_port = i; + port->flow_ctrl = PHY_FLOW_CTRL; + + port->hw = hw; + port->linked = &hw->port_info[port->first_port]; + + for (cnt = 0, pi = i; cnt < port_count; cnt++, pi++) { + hw->port_info[pi].port_id = pi; + hw->port_info[pi].pdev = dev; + hw->port_info[pi].state = media_disconnected; + } + + dev->mem_start = (unsigned long) hw->io; + dev->mem_end = dev->mem_start + reg_len - 1; + dev->irq = pdev->irq; + if (MAIN_PORT == i) + memcpy(dev->dev_addr, hw_priv->hw.override_addr, + ETH_ALEN); + else { + memcpy(dev->dev_addr, sw->other_addr, ETH_ALEN); + if (ether_addr_equal(sw->other_addr, hw->override_addr)) + dev->dev_addr[5] += port->first_port; + } + + dev->netdev_ops = &netdev_ops; + dev->ethtool_ops = &netdev_ethtool_ops; + if (register_netdev(dev)) + goto pcidev_init_reg_err; + port_set_power_saving(port, true); + } + + pci_dev_get(hw_priv->pdev); + pci_set_drvdata(pdev, info); + return 0; + +pcidev_init_reg_err: + for (i = 0; i < hw->dev_count; i++) { + if (info->netdev[i]) { + netdev_free(info->netdev[i]); + info->netdev[i] = NULL; + } + } + +pcidev_init_mem_err: + ksz_free_mem(hw_priv); + kfree(hw->ksz_switch); + +pcidev_init_alloc_err: + iounmap(hw->io); + +pcidev_init_io_err: + kfree(info); + +pcidev_init_dev_err: + release_mem_region(reg_base, reg_len); + + return result; +} + +static void pcidev_exit(struct pci_dev *pdev) +{ + int i; + struct platform_info *info = pci_get_drvdata(pdev); + struct dev_info *hw_priv = &info->dev_info; + + release_mem_region(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + for (i = 0; i < hw_priv->hw.dev_count; i++) { + if (info->netdev[i]) + netdev_free(info->netdev[i]); + } + if (hw_priv->hw.io) + iounmap(hw_priv->hw.io); + ksz_free_mem(hw_priv); + kfree(hw_priv->hw.ksz_switch); + pci_dev_put(hw_priv->pdev); + kfree(info); +} + +#ifdef CONFIG_PM +static int pcidev_resume(struct pci_dev *pdev) +{ + int i; + struct platform_info *info = pci_get_drvdata(pdev); + struct dev_info *hw_priv = &info->dev_info; + struct ksz_hw *hw = &hw_priv->hw; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + pci_enable_wake(pdev, PCI_D0, 0); + + if (hw_priv->wol_enable) + hw_cfg_wol_pme(hw, 0); + for (i = 0; i < hw->dev_count; i++) { + if (info->netdev[i]) { + struct net_device *dev = info->netdev[i]; + + if (netif_running(dev)) { + netdev_open(dev); + netif_device_attach(dev); + } + } + } + return 0; +} + +static int pcidev_suspend(struct pci_dev *pdev, pm_message_t state) +{ + int i; + struct platform_info *info = pci_get_drvdata(pdev); + struct dev_info *hw_priv = &info->dev_info; + struct ksz_hw *hw = &hw_priv->hw; + + /* Need to find a way to retrieve the device IP address. */ + static const u8 net_addr[] = { 192, 168, 1, 1 }; + + for (i = 0; i < hw->dev_count; i++) { + if (info->netdev[i]) { + struct net_device *dev = info->netdev[i]; + + if (netif_running(dev)) { + netif_device_detach(dev); + netdev_close(dev); + } + } + } + if (hw_priv->wol_enable) { + hw_enable_wol(hw, hw_priv->wol_enable, net_addr); + hw_cfg_wol_pme(hw, 1); + } + + pci_save_state(pdev); + pci_enable_wake(pdev, pci_choose_state(pdev, state), 1); + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + return 0; +} +#endif + +static char pcidev_name[] = "ksz884xp"; + +static DEFINE_PCI_DEVICE_TABLE(pcidev_table) = { + { PCI_VENDOR_ID_MICREL_KS, 0x8841, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { PCI_VENDOR_ID_MICREL_KS, 0x8842, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { 0 } +}; + +MODULE_DEVICE_TABLE(pci, pcidev_table); + +static struct pci_driver pci_device_driver = { +#ifdef CONFIG_PM + .suspend = pcidev_suspend, + .resume = pcidev_resume, +#endif + .name = pcidev_name, + .id_table = pcidev_table, + .probe = pcidev_init, + .remove = pcidev_exit +}; + +module_pci_driver(pci_device_driver); + +MODULE_DESCRIPTION("KSZ8841/2 PCI network driver"); +MODULE_AUTHOR("Tristram Ha <Tristram.Ha@micrel.com>"); +MODULE_LICENSE("GPL"); + +module_param_named(message, msg_enable, int, 0); +MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); + +module_param(macaddr, charp, 0); +module_param(mac1addr, charp, 0); +module_param(fast_aging, int, 0); +module_param(multi_dev, int, 0); +module_param(stp, int, 0); +MODULE_PARM_DESC(macaddr, "MAC address"); +MODULE_PARM_DESC(mac1addr, "Second MAC address"); +MODULE_PARM_DESC(fast_aging, "Fast aging"); +MODULE_PARM_DESC(multi_dev, "Multiple device interfaces"); +MODULE_PARM_DESC(stp, "STP support"); |