diff options
Diffstat (limited to 'drivers/net/au1000_eth.c')
| -rw-r--r-- | drivers/net/au1000_eth.c | 1308 |
1 files changed, 0 insertions, 1308 deletions
diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c deleted file mode 100644 index 6bac04603a8..00000000000 --- a/drivers/net/au1000_eth.c +++ /dev/null @@ -1,1308 +0,0 @@ -/* - * - * Alchemy Au1x00 ethernet driver - * - * Copyright 2001-2003, 2006 MontaVista Software Inc. - * Copyright 2002 TimeSys Corp. - * Added ethtool/mii-tool support, - * Copyright 2004 Matt Porter <mporter@kernel.crashing.org> - * Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de - * or riemer@riemer-nt.de: fixed the link beat detection with - * ioctls (SIOCGMIIPHY) - * Copyright 2006 Herbert Valerio Riedel <hvr@gnu.org> - * converted to use linux-2.6.x's PHY framework - * - * Author: MontaVista Software, Inc. - * ppopov@mvista.com or source@mvista.com - * - * ######################################################################## - * - * This program is free software; you can distribute 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 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., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * ######################################################################## - * - * - */ -#include <linux/capability.h> -#include <linux/dma-mapping.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/errno.h> -#include <linux/in.h> -#include <linux/ioport.h> -#include <linux/bitops.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/mii.h> -#include <linux/skbuff.h> -#include <linux/delay.h> -#include <linux/crc32.h> -#include <linux/phy.h> - -#include <asm/cpu.h> -#include <asm/mipsregs.h> -#include <asm/irq.h> -#include <asm/io.h> -#include <asm/processor.h> - -#include <au1000.h> -#include <prom.h> - -#include "au1000_eth.h" - -#ifdef AU1000_ETH_DEBUG -static int au1000_debug = 5; -#else -static int au1000_debug = 3; -#endif - -#define DRV_NAME "au1000_eth" -#define DRV_VERSION "1.6" -#define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>" -#define DRV_DESC "Au1xxx on-chip Ethernet driver" - -MODULE_AUTHOR(DRV_AUTHOR); -MODULE_DESCRIPTION(DRV_DESC); -MODULE_LICENSE("GPL"); - -/* - * Theory of operation - * - * The Au1000 MACs use a simple rx and tx descriptor ring scheme. - * There are four receive and four transmit descriptors. These - * descriptors are not in memory; rather, they are just a set of - * hardware registers. - * - * Since the Au1000 has a coherent data cache, the receive and - * transmit buffers are allocated from the KSEG0 segment. The - * hardware registers, however, are still mapped at KSEG1 to - * make sure there's no out-of-order writes, and that all writes - * complete immediately. - */ - -/* These addresses are only used if yamon doesn't tell us what - * the mac address is, and the mac address is not passed on the - * command line. - */ -static unsigned char au1000_mac_addr[6] __devinitdata = { - 0x00, 0x50, 0xc2, 0x0c, 0x30, 0x00 -}; - -struct au1000_private *au_macs[NUM_ETH_INTERFACES]; - -/* - * board-specific configurations - * - * PHY detection algorithm - * - * If AU1XXX_PHY_STATIC_CONFIG is undefined, the PHY setup is - * autodetected: - * - * mii_probe() first searches the current MAC's MII bus for a PHY, - * selecting the first (or last, if AU1XXX_PHY_SEARCH_HIGHEST_ADDR is - * defined) PHY address not already claimed by another netdev. - * - * If nothing was found that way when searching for the 2nd ethernet - * controller's PHY and AU1XXX_PHY1_SEARCH_ON_MAC0 is defined, then - * the first MII bus is searched as well for an unclaimed PHY; this is - * needed in case of a dual-PHY accessible only through the MAC0's MII - * bus. - * - * Finally, if no PHY is found, then the corresponding ethernet - * controller is not registered to the network subsystem. - */ - -/* autodetection defaults */ -#undef AU1XXX_PHY_SEARCH_HIGHEST_ADDR -#define AU1XXX_PHY1_SEARCH_ON_MAC0 - -/* static PHY setup - * - * most boards PHY setup should be detectable properly with the - * autodetection algorithm in mii_probe(), but in some cases (e.g. if - * you have a switch attached, or want to use the PHY's interrupt - * notification capabilities) you can provide a static PHY - * configuration here - * - * IRQs may only be set, if a PHY address was configured - * If a PHY address is given, also a bus id is required to be set - * - * ps: make sure the used irqs are configured properly in the board - * specific irq-map - */ - -#if defined(CONFIG_MIPS_BOSPORUS) -/* - * Micrel/Kendin 5 port switch attached to MAC0, - * MAC0 is associated with PHY address 5 (== WAN port) - * MAC1 is not associated with any PHY, since it's connected directly - * to the switch. - * no interrupts are used - */ -# define AU1XXX_PHY_STATIC_CONFIG - -# define AU1XXX_PHY0_ADDR 5 -# define AU1XXX_PHY0_BUSID 0 -# undef AU1XXX_PHY0_IRQ - -# undef AU1XXX_PHY1_ADDR -# undef AU1XXX_PHY1_BUSID -# undef AU1XXX_PHY1_IRQ -#endif - -#if defined(AU1XXX_PHY0_BUSID) && (AU1XXX_PHY0_BUSID > 0) -# error MAC0-associated PHY attached 2nd MACs MII bus not supported yet -#endif - -static void enable_mac(struct net_device *dev, int force_reset) -{ - unsigned long flags; - struct au1000_private *aup = netdev_priv(dev); - - spin_lock_irqsave(&aup->lock, flags); - - if(force_reset || (!aup->mac_enabled)) { - *aup->enable = MAC_EN_CLOCK_ENABLE; - au_sync_delay(2); - *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2 - | MAC_EN_CLOCK_ENABLE); - au_sync_delay(2); - - aup->mac_enabled = 1; - } - - spin_unlock_irqrestore(&aup->lock, flags); -} - -/* - * MII operations - */ -static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg) -{ - struct au1000_private *aup = netdev_priv(dev); - volatile u32 *const mii_control_reg = &aup->mac->mii_control; - volatile u32 *const mii_data_reg = &aup->mac->mii_data; - u32 timedout = 20; - u32 mii_control; - - while (*mii_control_reg & MAC_MII_BUSY) { - mdelay(1); - if (--timedout == 0) { - printk(KERN_ERR "%s: read_MII busy timeout!!\n", - dev->name); - return -1; - } - } - - mii_control = MAC_SET_MII_SELECT_REG(reg) | - MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ; - - *mii_control_reg = mii_control; - - timedout = 20; - while (*mii_control_reg & MAC_MII_BUSY) { - mdelay(1); - if (--timedout == 0) { - printk(KERN_ERR "%s: mdio_read busy timeout!!\n", - dev->name); - return -1; - } - } - return (int)*mii_data_reg; -} - -static void au1000_mdio_write(struct net_device *dev, int phy_addr, - int reg, u16 value) -{ - struct au1000_private *aup = netdev_priv(dev); - volatile u32 *const mii_control_reg = &aup->mac->mii_control; - volatile u32 *const mii_data_reg = &aup->mac->mii_data; - u32 timedout = 20; - u32 mii_control; - - while (*mii_control_reg & MAC_MII_BUSY) { - mdelay(1); - if (--timedout == 0) { - printk(KERN_ERR "%s: mdio_write busy timeout!!\n", - dev->name); - return; - } - } - - mii_control = MAC_SET_MII_SELECT_REG(reg) | - MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE; - - *mii_data_reg = value; - *mii_control_reg = mii_control; -} - -static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) -{ - /* WARNING: bus->phy_map[phy_addr].attached_dev == dev does - * _NOT_ hold (e.g. when PHY is accessed through other MAC's MII bus) */ - struct net_device *const dev = bus->priv; - - enable_mac(dev, 0); /* make sure the MAC associated with this - * mii_bus is enabled */ - return au1000_mdio_read(dev, phy_addr, regnum); -} - -static int au1000_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, - u16 value) -{ - struct net_device *const dev = bus->priv; - - enable_mac(dev, 0); /* make sure the MAC associated with this - * mii_bus is enabled */ - au1000_mdio_write(dev, phy_addr, regnum, value); - return 0; -} - -static int au1000_mdiobus_reset(struct mii_bus *bus) -{ - struct net_device *const dev = bus->priv; - - enable_mac(dev, 0); /* make sure the MAC associated with this - * mii_bus is enabled */ - return 0; -} - -static void hard_stop(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk(KERN_INFO "%s: hard stop\n", dev->name); - - aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE); - au_sync_delay(10); -} - -static void enable_rx_tx(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk(KERN_INFO "%s: enable_rx_tx\n", dev->name); - - aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE); - au_sync_delay(10); -} - -static void -au1000_adjust_link(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - struct phy_device *phydev = aup->phy_dev; - unsigned long flags; - - int status_change = 0; - - BUG_ON(!aup->phy_dev); - - spin_lock_irqsave(&aup->lock, flags); - - if (phydev->link && (aup->old_speed != phydev->speed)) { - // speed changed - - switch(phydev->speed) { - case SPEED_10: - case SPEED_100: - break; - default: - printk(KERN_WARNING - "%s: Speed (%d) is not 10/100 ???\n", - dev->name, phydev->speed); - break; - } - - aup->old_speed = phydev->speed; - - status_change = 1; - } - - if (phydev->link && (aup->old_duplex != phydev->duplex)) { - // duplex mode changed - - /* switching duplex mode requires to disable rx and tx! */ - hard_stop(dev); - - if (DUPLEX_FULL == phydev->duplex) - aup->mac->control = ((aup->mac->control - | MAC_FULL_DUPLEX) - & ~MAC_DISABLE_RX_OWN); - else - aup->mac->control = ((aup->mac->control - & ~MAC_FULL_DUPLEX) - | MAC_DISABLE_RX_OWN); - au_sync_delay(1); - - enable_rx_tx(dev); - aup->old_duplex = phydev->duplex; - - status_change = 1; - } - - if(phydev->link != aup->old_link) { - // link state changed - - if (!phydev->link) { - /* link went down */ - aup->old_speed = 0; - aup->old_duplex = -1; - } - - aup->old_link = phydev->link; - status_change = 1; - } - - spin_unlock_irqrestore(&aup->lock, flags); - - if (status_change) { - if (phydev->link) - printk(KERN_INFO "%s: link up (%d/%s)\n", - dev->name, phydev->speed, - DUPLEX_FULL == phydev->duplex ? "Full" : "Half"); - else - printk(KERN_INFO "%s: link down\n", dev->name); - } -} - -static int mii_probe (struct net_device *dev) -{ - struct au1000_private *const aup = netdev_priv(dev); - struct phy_device *phydev = NULL; - -#if defined(AU1XXX_PHY_STATIC_CONFIG) - BUG_ON(aup->mac_id < 0 || aup->mac_id > 1); - - if(aup->mac_id == 0) { /* get PHY0 */ -# if defined(AU1XXX_PHY0_ADDR) - phydev = au_macs[AU1XXX_PHY0_BUSID]->mii_bus->phy_map[AU1XXX_PHY0_ADDR]; -# else - printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n", - dev->name); - return 0; -# endif /* defined(AU1XXX_PHY0_ADDR) */ - } else if (aup->mac_id == 1) { /* get PHY1 */ -# if defined(AU1XXX_PHY1_ADDR) - phydev = au_macs[AU1XXX_PHY1_BUSID]->mii_bus->phy_map[AU1XXX_PHY1_ADDR]; -# else - printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n", - dev->name); - return 0; -# endif /* defined(AU1XXX_PHY1_ADDR) */ - } - -#else /* defined(AU1XXX_PHY_STATIC_CONFIG) */ - int phy_addr; - - /* find the first (lowest address) PHY on the current MAC's MII bus */ - for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) - if (aup->mii_bus->phy_map[phy_addr]) { - phydev = aup->mii_bus->phy_map[phy_addr]; -# if !defined(AU1XXX_PHY_SEARCH_HIGHEST_ADDR) - break; /* break out with first one found */ -# endif - } - -# if defined(AU1XXX_PHY1_SEARCH_ON_MAC0) - /* try harder to find a PHY */ - if (!phydev && (aup->mac_id == 1)) { - /* no PHY found, maybe we have a dual PHY? */ - printk (KERN_INFO DRV_NAME ": no PHY found on MAC1, " - "let's see if it's attached to MAC0...\n"); - - BUG_ON(!au_macs[0]); - - /* find the first (lowest address) non-attached PHY on - * the MAC0 MII bus */ - for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { - struct phy_device *const tmp_phydev = - au_macs[0]->mii_bus->phy_map[phy_addr]; - - if (!tmp_phydev) - continue; /* no PHY here... */ - - if (tmp_phydev->attached_dev) - continue; /* already claimed by MAC0 */ - - phydev = tmp_phydev; - break; /* found it */ - } - } -# endif /* defined(AU1XXX_PHY1_SEARCH_OTHER_BUS) */ - -#endif /* defined(AU1XXX_PHY_STATIC_CONFIG) */ - if (!phydev) { - printk (KERN_ERR DRV_NAME ":%s: no PHY found\n", dev->name); - return -1; - } - - /* now we are supposed to have a proper phydev, to attach to... */ - BUG_ON(phydev->attached_dev); - - phydev = phy_connect(dev, dev_name(&phydev->dev), &au1000_adjust_link, - 0, PHY_INTERFACE_MODE_MII); - - if (IS_ERR(phydev)) { - printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); - return PTR_ERR(phydev); - } - - /* mask with MAC supported features */ - phydev->supported &= (SUPPORTED_10baseT_Half - | SUPPORTED_10baseT_Full - | SUPPORTED_100baseT_Half - | SUPPORTED_100baseT_Full - | SUPPORTED_Autoneg - /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */ - | SUPPORTED_MII - | SUPPORTED_TP); - - phydev->advertising = phydev->supported; - - aup->old_link = 0; - aup->old_speed = 0; - aup->old_duplex = -1; - aup->phy_dev = phydev; - - printk(KERN_INFO "%s: attached PHY driver [%s] " - "(mii_bus:phy_addr=%s, irq=%d)\n", dev->name, - phydev->drv->name, dev_name(&phydev->dev), phydev->irq); - - return 0; -} - - -/* - * Buffer allocation/deallocation routines. The buffer descriptor returned - * has the virtual and dma address of a buffer suitable for - * both, receive and transmit operations. - */ -static db_dest_t *GetFreeDB(struct au1000_private *aup) -{ - db_dest_t *pDB; - pDB = aup->pDBfree; - - if (pDB) { - aup->pDBfree = pDB->pnext; - } - return pDB; -} - -void ReleaseDB(struct au1000_private *aup, db_dest_t *pDB) -{ - db_dest_t *pDBfree = aup->pDBfree; - if (pDBfree) - pDBfree->pnext = pDB; - aup->pDBfree = pDB; -} - -static void reset_mac_unlocked(struct net_device *dev) -{ - struct au1000_private *const aup = netdev_priv(dev); - int i; - - hard_stop(dev); - - *aup->enable = MAC_EN_CLOCK_ENABLE; - au_sync_delay(2); - *aup->enable = 0; - au_sync_delay(2); - - aup->tx_full = 0; - for (i = 0; i < NUM_RX_DMA; i++) { - /* reset control bits */ - aup->rx_dma_ring[i]->buff_stat &= ~0xf; - } - for (i = 0; i < NUM_TX_DMA; i++) { - /* reset control bits */ - aup->tx_dma_ring[i]->buff_stat &= ~0xf; - } - - aup->mac_enabled = 0; - -} - -static void reset_mac(struct net_device *dev) -{ - struct au1000_private *const aup = netdev_priv(dev); - unsigned long flags; - - if (au1000_debug > 4) - printk(KERN_INFO "%s: reset mac, aup %x\n", - dev->name, (unsigned)aup); - - spin_lock_irqsave(&aup->lock, flags); - - reset_mac_unlocked (dev); - - spin_unlock_irqrestore(&aup->lock, flags); -} - -/* - * Setup the receive and transmit "rings". These pointers are the addresses - * of the rx and tx MAC DMA registers so they are fixed by the hardware -- - * these are not descriptors sitting in memory. - */ -static void -setup_hw_rings(struct au1000_private *aup, u32 rx_base, u32 tx_base) -{ - int i; - - for (i = 0; i < NUM_RX_DMA; i++) { - aup->rx_dma_ring[i] = - (volatile rx_dma_t *) (rx_base + sizeof(rx_dma_t)*i); - } - for (i = 0; i < NUM_TX_DMA; i++) { - aup->tx_dma_ring[i] = - (volatile tx_dma_t *) (tx_base + sizeof(tx_dma_t)*i); - } -} - -static struct { - u32 base_addr; - u32 macen_addr; - int irq; - struct net_device *dev; -} iflist[2] = { -#ifdef CONFIG_SOC_AU1000 - {AU1000_ETH0_BASE, AU1000_MAC0_ENABLE, AU1000_MAC0_DMA_INT}, - {AU1000_ETH1_BASE, AU1000_MAC1_ENABLE, AU1000_MAC1_DMA_INT} -#endif -#ifdef CONFIG_SOC_AU1100 - {AU1100_ETH0_BASE, AU1100_MAC0_ENABLE, AU1100_MAC0_DMA_INT} -#endif -#ifdef CONFIG_SOC_AU1500 - {AU1500_ETH0_BASE, AU1500_MAC0_ENABLE, AU1500_MAC0_DMA_INT}, - {AU1500_ETH1_BASE, AU1500_MAC1_ENABLE, AU1500_MAC1_DMA_INT} -#endif -#ifdef CONFIG_SOC_AU1550 - {AU1550_ETH0_BASE, AU1550_MAC0_ENABLE, AU1550_MAC0_DMA_INT}, - {AU1550_ETH1_BASE, AU1550_MAC1_ENABLE, AU1550_MAC1_DMA_INT} -#endif -}; - -static int num_ifs; - -/* - * ethtool operations - */ - -static int au1000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (aup->phy_dev) - return phy_ethtool_gset(aup->phy_dev, cmd); - - return -EINVAL; -} - -static int au1000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - - if (aup->phy_dev) - return phy_ethtool_sset(aup->phy_dev, cmd); - - return -EINVAL; -} - -static void -au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) -{ - struct au1000_private *aup = netdev_priv(dev); - - strcpy(info->driver, DRV_NAME); - strcpy(info->version, DRV_VERSION); - info->fw_version[0] = '\0'; - sprintf(info->bus_info, "%s %d", DRV_NAME, aup->mac_id); - info->regdump_len = 0; -} - -static const struct ethtool_ops au1000_ethtool_ops = { - .get_settings = au1000_get_settings, - .set_settings = au1000_set_settings, - .get_drvinfo = au1000_get_drvinfo, - .get_link = ethtool_op_get_link, -}; - - -/* - * Initialize the interface. - * - * When the device powers up, the clocks are disabled and the - * mac is in reset state. When the interface is closed, we - * do the same -- reset the device and disable the clocks to - * conserve power. Thus, whenever au1000_init() is called, - * the device should already be in reset state. - */ -static int au1000_init(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - unsigned long flags; - int i; - u32 control; - - if (au1000_debug > 4) - printk("%s: au1000_init\n", dev->name); - - /* bring the device out of reset */ - enable_mac(dev, 1); - - spin_lock_irqsave(&aup->lock, flags); - - aup->mac->control = 0; - aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2; - aup->tx_tail = aup->tx_head; - aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2; - - aup->mac->mac_addr_high = dev->dev_addr[5]<<8 | dev->dev_addr[4]; - aup->mac->mac_addr_low = dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 | - dev->dev_addr[1]<<8 | dev->dev_addr[0]; - - for (i = 0; i < NUM_RX_DMA; i++) { - aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE; - } - au_sync(); - - control = MAC_RX_ENABLE | MAC_TX_ENABLE; -#ifndef CONFIG_CPU_LITTLE_ENDIAN - control |= MAC_BIG_ENDIAN; -#endif - if (aup->phy_dev) { - if (aup->phy_dev->link && (DUPLEX_FULL == aup->phy_dev->duplex)) - control |= MAC_FULL_DUPLEX; - else - control |= MAC_DISABLE_RX_OWN; - } else { /* PHY-less op, assume full-duplex */ - control |= MAC_FULL_DUPLEX; - } - - aup->mac->control = control; - aup->mac->vlan1_tag = 0x8100; /* activate vlan support */ - au_sync(); - - spin_unlock_irqrestore(&aup->lock, flags); - return 0; -} - -static inline void update_rx_stats(struct net_device *dev, u32 status) -{ - struct au1000_private *aup = netdev_priv(dev); - struct net_device_stats *ps = &dev->stats; - - ps->rx_packets++; - if (status & RX_MCAST_FRAME) - ps->multicast++; - - if (status & RX_ERROR) { - ps->rx_errors++; - if (status & RX_MISSED_FRAME) - ps->rx_missed_errors++; - if (status & (RX_OVERLEN | RX_RUNT | RX_LEN_ERROR)) - ps->rx_length_errors++; - if (status & RX_CRC_ERROR) - ps->rx_crc_errors++; - if (status & RX_COLL) - ps->collisions++; - } - else - ps->rx_bytes += status & RX_FRAME_LEN_MASK; - -} - -/* - * Au1000 receive routine. - */ -static int au1000_rx(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - struct sk_buff *skb; - volatile rx_dma_t *prxd; - u32 buff_stat, status; - db_dest_t *pDB; - u32 frmlen; - - if (au1000_debug > 5) - printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head); - - prxd = aup->rx_dma_ring[aup->rx_head]; - buff_stat = prxd->buff_stat; - while (buff_stat & RX_T_DONE) { - status = prxd->status; - pDB = aup->rx_db_inuse[aup->rx_head]; - update_rx_stats(dev, status); - if (!(status & RX_ERROR)) { - - /* good frame */ - frmlen = (status & RX_FRAME_LEN_MASK); - frmlen -= 4; /* Remove FCS */ - skb = dev_alloc_skb(frmlen + 2); - if (skb == NULL) { - printk(KERN_ERR - "%s: Memory squeeze, dropping packet.\n", - dev->name); - dev->stats.rx_dropped++; - continue; - } - skb_reserve(skb, 2); /* 16 byte IP header align */ - skb_copy_to_linear_data(skb, - (unsigned char *)pDB->vaddr, frmlen); - skb_put(skb, frmlen); - skb->protocol = eth_type_trans(skb, dev); - netif_rx(skb); /* pass the packet to upper layers */ - } - else { - if (au1000_debug > 4) { - if (status & RX_MISSED_FRAME) - printk("rx miss\n"); - if (status & RX_WDOG_TIMER) - printk("rx wdog\n"); - if (status & RX_RUNT) - printk("rx runt\n"); - if (status & RX_OVERLEN) - printk("rx overlen\n"); - if (status & RX_COLL) - printk("rx coll\n"); - if (status & RX_MII_ERROR) - printk("rx mii error\n"); - if (status & RX_CRC_ERROR) - printk("rx crc error\n"); - if (status & RX_LEN_ERROR) - printk("rx len error\n"); - if (status & RX_U_CNTRL_FRAME) - printk("rx u control frame\n"); - } - } - prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE); - aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1); - au_sync(); - - /* next descriptor */ - prxd = aup->rx_dma_ring[aup->rx_head]; - buff_stat = prxd->buff_stat; - } - return 0; -} - -static void update_tx_stats(struct net_device *dev, u32 status) -{ - struct au1000_private *aup = netdev_priv(dev); - struct net_device_stats *ps = &dev->stats; - - if (status & TX_FRAME_ABORTED) { - if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) { - if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) { - /* any other tx errors are only valid - * in half duplex mode */ - ps->tx_errors++; - ps->tx_aborted_errors++; - } - } - else { - ps->tx_errors++; - ps->tx_aborted_errors++; - if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER)) - ps->tx_carrier_errors++; - } - } -} - -/* - * Called from the interrupt service routine to acknowledge - * the TX DONE bits. This is a must if the irq is setup as - * edge triggered. - */ -static void au1000_tx_ack(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - volatile tx_dma_t *ptxd; - - ptxd = aup->tx_dma_ring[aup->tx_tail]; - - while (ptxd->buff_stat & TX_T_DONE) { - update_tx_stats(dev, ptxd->status); - ptxd->buff_stat &= ~TX_T_DONE; - ptxd->len = 0; - au_sync(); - - aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1); - ptxd = aup->tx_dma_ring[aup->tx_tail]; - - if (aup->tx_full) { - aup->tx_full = 0; - netif_wake_queue(dev); - } - } -} - -/* - * Au1000 interrupt service routine. - */ -static irqreturn_t au1000_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - - /* Handle RX interrupts first to minimize chance of overrun */ - - au1000_rx(dev); - au1000_tx_ack(dev); - return IRQ_RETVAL(1); -} - -static int au1000_open(struct net_device *dev) -{ - int retval; - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk("%s: open: dev=%p\n", dev->name, dev); - - if ((retval = request_irq(dev->irq, au1000_interrupt, 0, - dev->name, dev))) { - printk(KERN_ERR "%s: unable to get IRQ %d\n", - dev->name, dev->irq); - return retval; - } - - if ((retval = au1000_init(dev))) { - printk(KERN_ERR "%s: error in au1000_init\n", dev->name); - free_irq(dev->irq, dev); - return retval; - } - - if (aup->phy_dev) { - /* cause the PHY state machine to schedule a link state check */ - aup->phy_dev->state = PHY_CHANGELINK; - phy_start(aup->phy_dev); - } - - netif_start_queue(dev); - - if (au1000_debug > 4) - printk("%s: open: Initialization done.\n", dev->name); - - return 0; -} - -static int au1000_close(struct net_device *dev) -{ - unsigned long flags; - struct au1000_private *const aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk("%s: close: dev=%p\n", dev->name, dev); - - if (aup->phy_dev) - phy_stop(aup->phy_dev); - - spin_lock_irqsave(&aup->lock, flags); - - reset_mac_unlocked (dev); - - /* stop the device */ - netif_stop_queue(dev); - - /* disable the interrupt */ - free_irq(dev->irq, dev); - spin_unlock_irqrestore(&aup->lock, flags); - - return 0; -} - -/* - * Au1000 transmit routine. - */ -static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - struct net_device_stats *ps = &dev->stats; - volatile tx_dma_t *ptxd; - u32 buff_stat; - db_dest_t *pDB; - int i; - - if (au1000_debug > 5) - printk("%s: tx: aup %x len=%d, data=%p, head %d\n", - dev->name, (unsigned)aup, skb->len, - skb->data, aup->tx_head); - - ptxd = aup->tx_dma_ring[aup->tx_head]; - buff_stat = ptxd->buff_stat; - if (buff_stat & TX_DMA_ENABLE) { - /* We've wrapped around and the transmitter is still busy */ - netif_stop_queue(dev); - aup->tx_full = 1; - return NETDEV_TX_BUSY; - } - else if (buff_stat & TX_T_DONE) { - update_tx_stats(dev, ptxd->status); - ptxd->len = 0; - } - - if (aup->tx_full) { - aup->tx_full = 0; - netif_wake_queue(dev); - } - - pDB = aup->tx_db_inuse[aup->tx_head]; - skb_copy_from_linear_data(skb, pDB->vaddr, skb->len); - if (skb->len < ETH_ZLEN) { - for (i=skb->len; i<ETH_ZLEN; i++) { - ((char *)pDB->vaddr)[i] = 0; - } - ptxd->len = ETH_ZLEN; - } - else - ptxd->len = skb->len; - - ps->tx_packets++; - ps->tx_bytes += ptxd->len; - - ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE; - au_sync(); - dev_kfree_skb(skb); - aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1); - dev->trans_start = jiffies; - return NETDEV_TX_OK; -} - -/* - * The Tx ring has been full longer than the watchdog timeout - * value. The transmitter must be hung? - */ -static void au1000_tx_timeout(struct net_device *dev) -{ - printk(KERN_ERR "%s: au1000_tx_timeout: dev=%p\n", dev->name, dev); - reset_mac(dev); - au1000_init(dev); - dev->trans_start = jiffies; - netif_wake_queue(dev); -} - -static void au1000_multicast_list(struct net_device *dev) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (au1000_debug > 4) - printk("%s: au1000_multicast_list: flags=%x\n", dev->name, dev->flags); - - if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ - aup->mac->control |= MAC_PROMISCUOUS; - } else if ((dev->flags & IFF_ALLMULTI) || - dev->mc_count > MULTICAST_FILTER_LIMIT) { - aup->mac->control |= MAC_PASS_ALL_MULTI; - aup->mac->control &= ~MAC_PROMISCUOUS; - printk(KERN_INFO "%s: Pass all multicast\n", dev->name); - } else { - int i; - struct dev_mc_list *mclist; - u32 mc_filter[2]; /* Multicast hash filter */ - - mc_filter[1] = mc_filter[0] = 0; - for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; - i++, mclist = mclist->next) { - set_bit(ether_crc(ETH_ALEN, mclist->dmi_addr)>>26, - (long *)mc_filter); - } - aup->mac->multi_hash_high = mc_filter[1]; - aup->mac->multi_hash_low = mc_filter[0]; - aup->mac->control &= ~MAC_PROMISCUOUS; - aup->mac->control |= MAC_HASH_MODE; - } -} - -static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct au1000_private *aup = netdev_priv(dev); - - if (!netif_running(dev)) return -EINVAL; - - if (!aup->phy_dev) return -EINVAL; // PHY not controllable - - return phy_mii_ioctl(aup->phy_dev, if_mii(rq), cmd); -} - -static const struct net_device_ops au1000_netdev_ops = { - .ndo_open = au1000_open, - .ndo_stop = au1000_close, - .ndo_start_xmit = au1000_tx, - .ndo_set_multicast_list = au1000_multicast_list, - .ndo_do_ioctl = au1000_ioctl, - .ndo_tx_timeout = au1000_tx_timeout, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, - .ndo_change_mtu = eth_change_mtu, -}; - -static struct net_device * au1000_probe(int port_num) -{ - static unsigned version_printed = 0; - struct au1000_private *aup = NULL; - struct net_device *dev = NULL; - db_dest_t *pDB, *pDBfree; - char ethaddr[6]; - int irq, i, err; - u32 base, macen; - - if (port_num >= NUM_ETH_INTERFACES) - return NULL; - - base = CPHYSADDR(iflist[port_num].base_addr ); - macen = CPHYSADDR(iflist[port_num].macen_addr); - irq = iflist[port_num].irq; - - if (!request_mem_region( base, MAC_IOSIZE, "Au1x00 ENET") || - !request_mem_region(macen, 4, "Au1x00 ENET")) - return NULL; - - if (version_printed++ == 0) - printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR); - - dev = alloc_etherdev(sizeof(struct au1000_private)); - if (!dev) { - printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME); - return NULL; - } - - dev->base_addr = base; - dev->irq = irq; - dev->netdev_ops = &au1000_netdev_ops; - SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops); - dev->watchdog_timeo = ETH_TX_TIMEOUT; - - err = register_netdev(dev); - if (err != 0) { - printk(KERN_ERR "%s: Cannot register net device, error %d\n", - DRV_NAME, err); - free_netdev(dev); - return NULL; - } - - printk("%s: Au1xx0 Ethernet found at 0x%x, irq %d\n", - dev->name, base, irq); - - aup = netdev_priv(dev); - - spin_lock_init(&aup->lock); - - /* Allocate the data buffers */ - /* Snooping works fine with eth on all au1xxx */ - aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE * - (NUM_TX_BUFFS + NUM_RX_BUFFS), - &aup->dma_addr, 0); - if (!aup->vaddr) { - free_netdev(dev); - release_mem_region( base, MAC_IOSIZE); - release_mem_region(macen, 4); - return NULL; - } - - /* aup->mac is the base address of the MAC's registers */ - aup->mac = (volatile mac_reg_t *)iflist[port_num].base_addr; - - /* Setup some variables for quick register address access */ - aup->enable = (volatile u32 *)iflist[port_num].macen_addr; - aup->mac_id = port_num; - au_macs[port_num] = aup; - - if (port_num == 0) { - if (prom_get_ethernet_addr(ethaddr) == 0) - memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr)); - else { - printk(KERN_INFO "%s: No MAC address found\n", - dev->name); - /* Use the hard coded MAC addresses */ - } - - setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR); - } else if (port_num == 1) - setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR); - - /* - * Assign to the Ethernet ports two consecutive MAC addresses - * to match those that are printed on their stickers - */ - memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr)); - dev->dev_addr[5] += port_num; - - *aup->enable = 0; - aup->mac_enabled = 0; - - aup->mii_bus = mdiobus_alloc(); - if (aup->mii_bus == NULL) - goto err_out; - - aup->mii_bus->priv = dev; - aup->mii_bus->read = au1000_mdiobus_read; - aup->mii_bus->write = au1000_mdiobus_write; - aup->mii_bus->reset = au1000_mdiobus_reset; - aup->mii_bus->name = "au1000_eth_mii"; - snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id); - aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); - if (aup->mii_bus->irq == NULL) - goto err_out; - - for(i = 0; i < PHY_MAX_ADDR; ++i) - aup->mii_bus->irq[i] = PHY_POLL; - - /* if known, set corresponding PHY IRQs */ -#if defined(AU1XXX_PHY_STATIC_CONFIG) -# if defined(AU1XXX_PHY0_IRQ) - if (AU1XXX_PHY0_BUSID == aup->mac_id) - aup->mii_bus->irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ; -# endif -# if defined(AU1XXX_PHY1_IRQ) - if (AU1XXX_PHY1_BUSID == aup->mac_id) - aup->mii_bus->irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ; -# endif -#endif - mdiobus_register(aup->mii_bus); - - if (mii_probe(dev) != 0) { - goto err_out; - } - - pDBfree = NULL; - /* setup the data buffer descriptors and attach a buffer to each one */ - pDB = aup->db; - for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) { - pDB->pnext = pDBfree; - pDBfree = pDB; - pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i); - pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr); - pDB++; - } - aup->pDBfree = pDBfree; - - for (i = 0; i < NUM_RX_DMA; i++) { - pDB = GetFreeDB(aup); - if (!pDB) { - goto err_out; - } - aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; - aup->rx_db_inuse[i] = pDB; - } - for (i = 0; i < NUM_TX_DMA; i++) { - pDB = GetFreeDB(aup); - if (!pDB) { - goto err_out; - } - aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr; - aup->tx_dma_ring[i]->len = 0; - aup->tx_db_inuse[i] = pDB; - } - - /* - * The boot code uses the ethernet controller, so reset it to start - * fresh. au1000_init() expects that the device is in reset state. - */ - reset_mac(dev); - - return dev; - -err_out: - if (aup->mii_bus != NULL) { - mdiobus_unregister(aup->mii_bus); - mdiobus_free(aup->mii_bus); - } - - /* here we should have a valid dev plus aup-> register addresses - * so we can reset the mac properly.*/ - reset_mac(dev); - - for (i = 0; i < NUM_RX_DMA; i++) { - if (aup->rx_db_inuse[i]) - ReleaseDB(aup, aup->rx_db_inuse[i]); - } - for (i = 0; i < NUM_TX_DMA; i++) { - if (aup->tx_db_inuse[i]) - ReleaseDB(aup, aup->tx_db_inuse[i]); - } - dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr); - unregister_netdev(dev); - free_netdev(dev); - release_mem_region( base, MAC_IOSIZE); - release_mem_region(macen, 4); - return NULL; -} - -/* - * Setup the base address and interrupt of the Au1xxx ethernet macs - * based on cpu type and whether the interface is enabled in sys_pinfunc - * register. The last interface is enabled if SYS_PF_NI2 (bit 4) is 0. - */ -static int __init au1000_init_module(void) -{ - int ni = (int)((au_readl(SYS_PINFUNC) & (u32)(SYS_PF_NI2)) >> 4); - struct net_device *dev; - int i, found_one = 0; - - num_ifs = NUM_ETH_INTERFACES - ni; - - for(i = 0; i < num_ifs; i++) { - dev = au1000_probe(i); - iflist[i].dev = dev; - if (dev) - found_one++; - } - if (!found_one) - return -ENODEV; - return 0; -} - -static void __exit au1000_cleanup_module(void) -{ - int i, j; - struct net_device *dev; - struct au1000_private *aup; - - for (i = 0; i < num_ifs; i++) { - dev = iflist[i].dev; - if (dev) { - aup = netdev_priv(dev); - unregister_netdev(dev); - mdiobus_unregister(aup->mii_bus); - mdiobus_free(aup->mii_bus); - for (j = 0; j < NUM_RX_DMA; j++) - if (aup->rx_db_inuse[j]) - ReleaseDB(aup, aup->rx_db_inuse[j]); - for (j = 0; j < NUM_TX_DMA; j++) - if (aup->tx_db_inuse[j]) - ReleaseDB(aup, aup->tx_db_inuse[j]); - dma_free_noncoherent(NULL, MAX_BUF_SIZE * - (NUM_TX_BUFFS + NUM_RX_BUFFS), - (void *)aup->vaddr, aup->dma_addr); - release_mem_region(dev->base_addr, MAC_IOSIZE); - release_mem_region(CPHYSADDR(iflist[i].macen_addr), 4); - free_netdev(dev); - } - } -} - -module_init(au1000_init_module); -module_exit(au1000_cleanup_module); |