diff options
Diffstat (limited to 'drivers/net/ethernet/davicom/dm9000.c')
| -rw-r--r-- | drivers/net/ethernet/davicom/dm9000.c | 1766 |
1 files changed, 1766 insertions, 0 deletions
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c new file mode 100644 index 00000000000..13723c96d1a --- /dev/null +++ b/drivers/net/ethernet/davicom/dm9000.c @@ -0,0 +1,1766 @@ +/* + * Davicom DM9000 Fast Ethernet driver for Linux. + * Copyright (C) 1997 Sten Wang + * + * 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. + * + * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved. + * + * Additional updates, Copyright: + * Ben Dooks <ben@simtec.co.uk> + * Sascha Hauer <s.hauer@pengutronix.de> + */ + +#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/of.h> +#include <linux/of_net.h> +#include <linux/ethtool.h> +#include <linux/dm9000.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/slab.h> + +#include <asm/delay.h> +#include <asm/irq.h> +#include <asm/io.h> + +#include "dm9000.h" + +/* Board/System/Debug information/definition ---------------- */ + +#define DM9000_PHY 0x40 /* PHY address 0x01 */ + +#define CARDNAME "dm9000" +#define DRV_VERSION "1.31" + +/* + * Transmit timeout, default 5 seconds. + */ +static int watchdog = 5000; +module_param(watchdog, int, 0400); +MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds"); + +/* + * Debug messages level + */ +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "dm9000 debug level (0-4)"); + +/* DM9000 register address locking. + * + * The DM9000 uses an address register to control where data written + * to the data register goes. This means that the address register + * must be preserved over interrupts or similar calls. + * + * During interrupt and other critical calls, a spinlock is used to + * protect the system, but the calls themselves save the address + * in the address register in case they are interrupting another + * access to the device. + * + * For general accesses a lock is provided so that calls which are + * allowed to sleep are serialised so that the address register does + * not need to be saved. This lock also serves to serialise access + * to the EEPROM and PHY access registers which are shared between + * these two devices. + */ + +/* The driver supports the original DM9000E, and now the two newer + * devices, DM9000A and DM9000B. + */ + +enum dm9000_type { + TYPE_DM9000E, /* original DM9000 */ + TYPE_DM9000A, + TYPE_DM9000B +}; + +/* Structure/enum declaration ------------------------------- */ +typedef struct board_info { + + void __iomem *io_addr; /* Register I/O base address */ + void __iomem *io_data; /* Data I/O address */ + u16 irq; /* IRQ */ + + u16 tx_pkt_cnt; + u16 queue_pkt_len; + u16 queue_start_addr; + u16 queue_ip_summed; + u16 dbug_cnt; + u8 io_mode; /* 0:word, 2:byte */ + u8 phy_addr; + u8 imr_all; + + unsigned int flags; + unsigned int in_timeout:1; + unsigned int in_suspend:1; + unsigned int wake_supported:1; + + enum dm9000_type type; + + void (*inblk)(void __iomem *port, void *data, int length); + void (*outblk)(void __iomem *port, void *data, int length); + void (*dumpblk)(void __iomem *port, int length); + + struct device *dev; /* parent device */ + + struct resource *addr_res; /* resources found */ + struct resource *data_res; + struct resource *addr_req; /* resources requested */ + struct resource *data_req; + struct resource *irq_res; + + int irq_wake; + + struct mutex addr_lock; /* phy and eeprom access lock */ + + struct delayed_work phy_poll; + struct net_device *ndev; + + spinlock_t lock; + + struct mii_if_info mii; + u32 msg_enable; + u32 wake_state; + + int ip_summed; +} board_info_t; + +/* debug code */ + +#define dm9000_dbg(db, lev, msg...) do { \ + if ((lev) < debug) { \ + dev_dbg(db->dev, msg); \ + } \ +} while (0) + +static inline board_info_t *to_dm9000_board(struct net_device *dev) +{ + return netdev_priv(dev); +} + +/* DM9000 network board routine ---------------------------- */ + +/* + * Read a byte from I/O port + */ +static u8 +ior(board_info_t *db, int reg) +{ + writeb(reg, db->io_addr); + return readb(db->io_data); +} + +/* + * Write a byte to I/O port + */ + +static void +iow(board_info_t *db, int reg, int value) +{ + writeb(reg, db->io_addr); + writeb(value, db->io_data); +} + +static void +dm9000_reset(board_info_t *db) +{ + dev_dbg(db->dev, "resetting device\n"); + + /* Reset DM9000, see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 + * The essential point is that we have to do a double reset, and the + * instruction is to set LBK into MAC internal loopback mode. + */ + iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK); + udelay(100); /* Application note says at least 20 us */ + if (ior(db, DM9000_NCR) & 1) + dev_err(db->dev, "dm9000 did not respond to first reset\n"); + + iow(db, DM9000_NCR, 0); + iow(db, DM9000_NCR, NCR_RST | NCR_MAC_LBK); + udelay(100); + if (ior(db, DM9000_NCR) & 1) + dev_err(db->dev, "dm9000 did not respond to second reset\n"); +} + +/* routines for sending block to chip */ + +static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count) +{ + iowrite8_rep(reg, data, count); +} + +static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count) +{ + iowrite16_rep(reg, data, (count+1) >> 1); +} + +static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count) +{ + iowrite32_rep(reg, data, (count+3) >> 2); +} + +/* input block from chip to memory */ + +static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count) +{ + ioread8_rep(reg, data, count); +} + + +static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count) +{ + ioread16_rep(reg, data, (count+1) >> 1); +} + +static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count) +{ + ioread32_rep(reg, data, (count+3) >> 2); +} + +/* dump block from chip to null */ + +static void dm9000_dumpblk_8bit(void __iomem *reg, int count) +{ + int i; + int tmp; + + for (i = 0; i < count; i++) + tmp = readb(reg); +} + +static void dm9000_dumpblk_16bit(void __iomem *reg, int count) +{ + int i; + int tmp; + + count = (count + 1) >> 1; + + for (i = 0; i < count; i++) + tmp = readw(reg); +} + +static void dm9000_dumpblk_32bit(void __iomem *reg, int count) +{ + int i; + int tmp; + + count = (count + 3) >> 2; + + for (i = 0; i < count; i++) + tmp = readl(reg); +} + +/* + * Sleep, either by using msleep() or if we are suspending, then + * use mdelay() to sleep. + */ +static void dm9000_msleep(board_info_t *db, unsigned int ms) +{ + if (db->in_suspend || db->in_timeout) + mdelay(ms); + else + msleep(ms); +} + +/* Read a word from phyxcer */ +static int +dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg) +{ + board_info_t *db = netdev_priv(dev); + unsigned long flags; + unsigned int reg_save; + int ret; + + mutex_lock(&db->addr_lock); + + spin_lock_irqsave(&db->lock, flags); + + /* Save previous register address */ + reg_save = readb(db->io_addr); + + /* Fill the phyxcer register into REG_0C */ + iow(db, DM9000_EPAR, DM9000_PHY | reg); + + /* Issue phyxcer read command */ + iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS); + + writeb(reg_save, db->io_addr); + spin_unlock_irqrestore(&db->lock, flags); + + dm9000_msleep(db, 1); /* Wait read complete */ + + spin_lock_irqsave(&db->lock, flags); + reg_save = readb(db->io_addr); + + iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */ + + /* The read data keeps on REG_0D & REG_0E */ + ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL); + + /* restore the previous address */ + writeb(reg_save, db->io_addr); + spin_unlock_irqrestore(&db->lock, flags); + + mutex_unlock(&db->addr_lock); + + dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret); + return ret; +} + +/* Write a word to phyxcer */ +static void +dm9000_phy_write(struct net_device *dev, + int phyaddr_unused, int reg, int value) +{ + board_info_t *db = netdev_priv(dev); + unsigned long flags; + unsigned long reg_save; + + dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value); + if (!db->in_timeout) + mutex_lock(&db->addr_lock); + + spin_lock_irqsave(&db->lock, flags); + + /* Save previous register address */ + reg_save = readb(db->io_addr); + + /* Fill the phyxcer register into REG_0C */ + iow(db, DM9000_EPAR, DM9000_PHY | reg); + + /* Fill the written data into REG_0D & REG_0E */ + iow(db, DM9000_EPDRL, value); + iow(db, DM9000_EPDRH, value >> 8); + + /* Issue phyxcer write command */ + iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW); + + writeb(reg_save, db->io_addr); + spin_unlock_irqrestore(&db->lock, flags); + + dm9000_msleep(db, 1); /* Wait write complete */ + + spin_lock_irqsave(&db->lock, flags); + reg_save = readb(db->io_addr); + + iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */ + + /* restore the previous address */ + writeb(reg_save, db->io_addr); + + spin_unlock_irqrestore(&db->lock, flags); + if (!db->in_timeout) + mutex_unlock(&db->addr_lock); +} + +/* dm9000_set_io + * + * select the specified set of io routines to use with the + * device + */ + +static void dm9000_set_io(struct board_info *db, int byte_width) +{ + /* use the size of the data resource to work out what IO + * routines we want to use + */ + + switch (byte_width) { + case 1: + db->dumpblk = dm9000_dumpblk_8bit; + db->outblk = dm9000_outblk_8bit; + db->inblk = dm9000_inblk_8bit; + break; + + + case 3: + dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n"); + case 2: + db->dumpblk = dm9000_dumpblk_16bit; + db->outblk = dm9000_outblk_16bit; + db->inblk = dm9000_inblk_16bit; + break; + + case 4: + default: + db->dumpblk = dm9000_dumpblk_32bit; + db->outblk = dm9000_outblk_32bit; + db->inblk = dm9000_inblk_32bit; + break; + } +} + +static void dm9000_schedule_poll(board_info_t *db) +{ + if (db->type == TYPE_DM9000E) + schedule_delayed_work(&db->phy_poll, HZ * 2); +} + +static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd) +{ + board_info_t *dm = to_dm9000_board(dev); + + if (!netif_running(dev)) + return -EINVAL; + + return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL); +} + +static unsigned int +dm9000_read_locked(board_info_t *db, int reg) +{ + unsigned long flags; + unsigned int ret; + + spin_lock_irqsave(&db->lock, flags); + ret = ior(db, reg); + spin_unlock_irqrestore(&db->lock, flags); + + return ret; +} + +static int dm9000_wait_eeprom(board_info_t *db) +{ + unsigned int status; + int timeout = 8; /* wait max 8msec */ + + /* The DM9000 data sheets say we should be able to + * poll the ERRE bit in EPCR to wait for the EEPROM + * operation. From testing several chips, this bit + * does not seem to work. + * + * We attempt to use the bit, but fall back to the + * timeout (which is why we do not return an error + * on expiry) to say that the EEPROM operation has + * completed. + */ + + while (1) { + status = dm9000_read_locked(db, DM9000_EPCR); + + if ((status & EPCR_ERRE) == 0) + break; + + msleep(1); + + if (timeout-- < 0) { + dev_dbg(db->dev, "timeout waiting EEPROM\n"); + break; + } + } + + return 0; +} + +/* + * Read a word data from EEPROM + */ +static void +dm9000_read_eeprom(board_info_t *db, int offset, u8 *to) +{ + unsigned long flags; + + if (db->flags & DM9000_PLATF_NO_EEPROM) { + to[0] = 0xff; + to[1] = 0xff; + return; + } + + mutex_lock(&db->addr_lock); + + spin_lock_irqsave(&db->lock, flags); + + iow(db, DM9000_EPAR, offset); + iow(db, DM9000_EPCR, EPCR_ERPRR); + + spin_unlock_irqrestore(&db->lock, flags); + + dm9000_wait_eeprom(db); + + /* delay for at-least 150uS */ + msleep(1); + + spin_lock_irqsave(&db->lock, flags); + + iow(db, DM9000_EPCR, 0x0); + + to[0] = ior(db, DM9000_EPDRL); + to[1] = ior(db, DM9000_EPDRH); + + spin_unlock_irqrestore(&db->lock, flags); + + mutex_unlock(&db->addr_lock); +} + +/* + * Write a word data to SROM + */ +static void +dm9000_write_eeprom(board_info_t *db, int offset, u8 *data) +{ + unsigned long flags; + + if (db->flags & DM9000_PLATF_NO_EEPROM) + return; + + mutex_lock(&db->addr_lock); + + spin_lock_irqsave(&db->lock, flags); + iow(db, DM9000_EPAR, offset); + iow(db, DM9000_EPDRH, data[1]); + iow(db, DM9000_EPDRL, data[0]); + iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW); + spin_unlock_irqrestore(&db->lock, flags); + + dm9000_wait_eeprom(db); + + mdelay(1); /* wait at least 150uS to clear */ + + spin_lock_irqsave(&db->lock, flags); + iow(db, DM9000_EPCR, 0); + spin_unlock_irqrestore(&db->lock, flags); + + mutex_unlock(&db->addr_lock); +} + +/* ethtool ops */ + +static void dm9000_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + board_info_t *dm = to_dm9000_board(dev); + + strlcpy(info->driver, CARDNAME, sizeof(info->driver)); + strlcpy(info->version, DRV_VERSION, sizeof(info->version)); + strlcpy(info->bus_info, to_platform_device(dm->dev)->name, + sizeof(info->bus_info)); +} + +static u32 dm9000_get_msglevel(struct net_device *dev) +{ + board_info_t *dm = to_dm9000_board(dev); + + return dm->msg_enable; +} + +static void dm9000_set_msglevel(struct net_device *dev, u32 value) +{ + board_info_t *dm = to_dm9000_board(dev); + + dm->msg_enable = value; +} + +static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + board_info_t *dm = to_dm9000_board(dev); + + mii_ethtool_gset(&dm->mii, cmd); + return 0; +} + +static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + board_info_t *dm = to_dm9000_board(dev); + + return mii_ethtool_sset(&dm->mii, cmd); +} + +static int dm9000_nway_reset(struct net_device *dev) +{ + board_info_t *dm = to_dm9000_board(dev); + return mii_nway_restart(&dm->mii); +} + +static int dm9000_set_features(struct net_device *dev, + netdev_features_t features) +{ + board_info_t *dm = to_dm9000_board(dev); + netdev_features_t changed = dev->features ^ features; + unsigned long flags; + + if (!(changed & NETIF_F_RXCSUM)) + return 0; + + spin_lock_irqsave(&dm->lock, flags); + iow(dm, DM9000_RCSR, (features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0); + spin_unlock_irqrestore(&dm->lock, flags); + + return 0; +} + +static u32 dm9000_get_link(struct net_device *dev) +{ + board_info_t *dm = to_dm9000_board(dev); + u32 ret; + + if (dm->flags & DM9000_PLATF_EXT_PHY) + ret = mii_link_ok(&dm->mii); + else + ret = dm9000_read_locked(dm, DM9000_NSR) & NSR_LINKST ? 1 : 0; + + return ret; +} + +#define DM_EEPROM_MAGIC (0x444D394B) + +static int dm9000_get_eeprom_len(struct net_device *dev) +{ + return 128; +} + +static int dm9000_get_eeprom(struct net_device *dev, + struct ethtool_eeprom *ee, u8 *data) +{ + board_info_t *dm = to_dm9000_board(dev); + int offset = ee->offset; + int len = ee->len; + int i; + + /* EEPROM access is aligned to two bytes */ + + if ((len & 1) != 0 || (offset & 1) != 0) + return -EINVAL; + + if (dm->flags & DM9000_PLATF_NO_EEPROM) + return -ENOENT; + + ee->magic = DM_EEPROM_MAGIC; + + for (i = 0; i < len; i += 2) + dm9000_read_eeprom(dm, (offset + i) / 2, data + i); + + return 0; +} + +static int dm9000_set_eeprom(struct net_device *dev, + struct ethtool_eeprom *ee, u8 *data) +{ + board_info_t *dm = to_dm9000_board(dev); + int offset = ee->offset; + int len = ee->len; + int done; + + /* EEPROM access is aligned to two bytes */ + + if (dm->flags & DM9000_PLATF_NO_EEPROM) + return -ENOENT; + + if (ee->magic != DM_EEPROM_MAGIC) + return -EINVAL; + + while (len > 0) { + if (len & 1 || offset & 1) { + int which = offset & 1; + u8 tmp[2]; + + dm9000_read_eeprom(dm, offset / 2, tmp); + tmp[which] = *data; + dm9000_write_eeprom(dm, offset / 2, tmp); + + done = 1; + } else { + dm9000_write_eeprom(dm, offset / 2, data); + done = 2; + } + + data += done; + offset += done; + len -= done; + } + + return 0; +} + +static void dm9000_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) +{ + board_info_t *dm = to_dm9000_board(dev); + + memset(w, 0, sizeof(struct ethtool_wolinfo)); + + /* note, we could probably support wake-phy too */ + w->supported = dm->wake_supported ? WAKE_MAGIC : 0; + w->wolopts = dm->wake_state; +} + +static int dm9000_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) +{ + board_info_t *dm = to_dm9000_board(dev); + unsigned long flags; + u32 opts = w->wolopts; + u32 wcr = 0; + + if (!dm->wake_supported) + return -EOPNOTSUPP; + + if (opts & ~WAKE_MAGIC) + return -EINVAL; + + if (opts & WAKE_MAGIC) + wcr |= WCR_MAGICEN; + + mutex_lock(&dm->addr_lock); + + spin_lock_irqsave(&dm->lock, flags); + iow(dm, DM9000_WCR, wcr); + spin_unlock_irqrestore(&dm->lock, flags); + + mutex_unlock(&dm->addr_lock); + + if (dm->wake_state != opts) { + /* change in wol state, update IRQ state */ + + if (!dm->wake_state) + irq_set_irq_wake(dm->irq_wake, 1); + else if (dm->wake_state && !opts) + irq_set_irq_wake(dm->irq_wake, 0); + } + + dm->wake_state = opts; + return 0; +} + +static const struct ethtool_ops dm9000_ethtool_ops = { + .get_drvinfo = dm9000_get_drvinfo, + .get_settings = dm9000_get_settings, + .set_settings = dm9000_set_settings, + .get_msglevel = dm9000_get_msglevel, + .set_msglevel = dm9000_set_msglevel, + .nway_reset = dm9000_nway_reset, + .get_link = dm9000_get_link, + .get_wol = dm9000_get_wol, + .set_wol = dm9000_set_wol, + .get_eeprom_len = dm9000_get_eeprom_len, + .get_eeprom = dm9000_get_eeprom, + .set_eeprom = dm9000_set_eeprom, +}; + +static void dm9000_show_carrier(board_info_t *db, + unsigned carrier, unsigned nsr) +{ + int lpa; + struct net_device *ndev = db->ndev; + struct mii_if_info *mii = &db->mii; + unsigned ncr = dm9000_read_locked(db, DM9000_NCR); + + if (carrier) { + lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); + dev_info(db->dev, + "%s: link up, %dMbps, %s-duplex, lpa 0x%04X\n", + ndev->name, (nsr & NSR_SPEED) ? 10 : 100, + (ncr & NCR_FDX) ? "full" : "half", lpa); + } else { + dev_info(db->dev, "%s: link down\n", ndev->name); + } +} + +static void +dm9000_poll_work(struct work_struct *w) +{ + struct delayed_work *dw = to_delayed_work(w); + board_info_t *db = container_of(dw, board_info_t, phy_poll); + struct net_device *ndev = db->ndev; + + if (db->flags & DM9000_PLATF_SIMPLE_PHY && + !(db->flags & DM9000_PLATF_EXT_PHY)) { + unsigned nsr = dm9000_read_locked(db, DM9000_NSR); + unsigned old_carrier = netif_carrier_ok(ndev) ? 1 : 0; + unsigned new_carrier; + + new_carrier = (nsr & NSR_LINKST) ? 1 : 0; + + if (old_carrier != new_carrier) { + if (netif_msg_link(db)) + dm9000_show_carrier(db, new_carrier, nsr); + + if (!new_carrier) + netif_carrier_off(ndev); + else + netif_carrier_on(ndev); + } + } else + mii_check_media(&db->mii, netif_msg_link(db), 0); + + if (netif_running(ndev)) + dm9000_schedule_poll(db); +} + +/* dm9000_release_board + * + * release a board, and any mapped resources + */ + +static void +dm9000_release_board(struct platform_device *pdev, struct board_info *db) +{ + /* unmap our resources */ + + iounmap(db->io_addr); + iounmap(db->io_data); + + /* release the resources */ + + release_resource(db->data_req); + kfree(db->data_req); + + release_resource(db->addr_req); + kfree(db->addr_req); +} + +static unsigned char dm9000_type_to_char(enum dm9000_type type) +{ + switch (type) { + case TYPE_DM9000E: return 'e'; + case TYPE_DM9000A: return 'a'; + case TYPE_DM9000B: return 'b'; + } + + return '?'; +} + +/* + * Set DM9000 multicast address + */ +static void +dm9000_hash_table_unlocked(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + struct netdev_hw_addr *ha; + int i, oft; + u32 hash_val; + u16 hash_table[4] = { 0, 0, 0, 0x8000 }; /* broadcast address */ + u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN; + + dm9000_dbg(db, 1, "entering %s\n", __func__); + + for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++) + iow(db, oft, dev->dev_addr[i]); + + if (dev->flags & IFF_PROMISC) + rcr |= RCR_PRMSC; + + if (dev->flags & IFF_ALLMULTI) + rcr |= RCR_ALL; + + /* the multicast address in Hash Table : 64 bits */ + netdev_for_each_mc_addr(ha, dev) { + hash_val = ether_crc_le(6, ha->addr) & 0x3f; + hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16); + } + + /* Write the hash table to MAC MD table */ + for (i = 0, oft = DM9000_MAR; i < 4; i++) { + iow(db, oft++, hash_table[i]); + iow(db, oft++, hash_table[i] >> 8); + } + + iow(db, DM9000_RCR, rcr); +} + +static void +dm9000_hash_table(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&db->lock, flags); + dm9000_hash_table_unlocked(dev); + spin_unlock_irqrestore(&db->lock, flags); +} + +static void +dm9000_mask_interrupts(board_info_t *db) +{ + iow(db, DM9000_IMR, IMR_PAR); +} + +static void +dm9000_unmask_interrupts(board_info_t *db) +{ + iow(db, DM9000_IMR, db->imr_all); +} + +/* + * Initialize dm9000 board + */ +static void +dm9000_init_dm9000(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + unsigned int imr; + unsigned int ncr; + + dm9000_dbg(db, 1, "entering %s\n", __func__); + + dm9000_reset(db); + dm9000_mask_interrupts(db); + + /* I/O mode */ + db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */ + + /* Checksum mode */ + if (dev->hw_features & NETIF_F_RXCSUM) + iow(db, DM9000_RCSR, + (dev->features & NETIF_F_RXCSUM) ? RCSR_CSUM : 0); + + iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */ + iow(db, DM9000_GPR, 0); + + /* If we are dealing with DM9000B, some extra steps are required: a + * manual phy reset, and setting init params. + */ + if (db->type == TYPE_DM9000B) { + dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); + dm9000_phy_write(dev, 0, MII_DM_DSPCR, DSPCR_INIT_PARAM); + } + + ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0; + + /* if wol is needed, then always set NCR_WAKEEN otherwise we end + * up dumping the wake events if we disable this. There is already + * a wake-mask in DM9000_WCR */ + if (db->wake_supported) + ncr |= NCR_WAKEEN; + + iow(db, DM9000_NCR, ncr); + + /* Program operating register */ + iow(db, DM9000_TCR, 0); /* TX Polling clear */ + iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */ + iow(db, DM9000_FCR, 0xff); /* Flow Control */ + iow(db, DM9000_SMCR, 0); /* Special Mode */ + /* clear TX status */ + iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END); + iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */ + + /* Set address filter table */ + dm9000_hash_table_unlocked(dev); + + imr = IMR_PAR | IMR_PTM | IMR_PRM; + if (db->type != TYPE_DM9000E) + imr |= IMR_LNKCHNG; + + db->imr_all = imr; + + /* Init Driver variable */ + db->tx_pkt_cnt = 0; + db->queue_pkt_len = 0; + dev->trans_start = jiffies; +} + +/* Our watchdog timed out. Called by the networking layer */ +static void dm9000_timeout(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + u8 reg_save; + unsigned long flags; + + /* Save previous register address */ + spin_lock_irqsave(&db->lock, flags); + db->in_timeout = 1; + reg_save = readb(db->io_addr); + + netif_stop_queue(dev); + dm9000_init_dm9000(dev); + dm9000_unmask_interrupts(db); + /* We can accept TX packets again */ + dev->trans_start = jiffies; /* prevent tx timeout */ + netif_wake_queue(dev); + + /* Restore previous register address */ + writeb(reg_save, db->io_addr); + db->in_timeout = 0; + spin_unlock_irqrestore(&db->lock, flags); +} + +static void dm9000_send_packet(struct net_device *dev, + int ip_summed, + u16 pkt_len) +{ + board_info_t *dm = to_dm9000_board(dev); + + /* The DM9000 is not smart enough to leave fragmented packets alone. */ + if (dm->ip_summed != ip_summed) { + if (ip_summed == CHECKSUM_NONE) + iow(dm, DM9000_TCCR, 0); + else + iow(dm, DM9000_TCCR, TCCR_IP | TCCR_UDP | TCCR_TCP); + dm->ip_summed = ip_summed; + } + + /* Set TX length to DM9000 */ + iow(dm, DM9000_TXPLL, pkt_len); + iow(dm, DM9000_TXPLH, pkt_len >> 8); + + /* Issue TX polling command */ + iow(dm, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */ +} + +/* + * Hardware start transmission. + * Send a packet to media from the upper layer. + */ +static int +dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + unsigned long flags; + board_info_t *db = netdev_priv(dev); + + dm9000_dbg(db, 3, "%s:\n", __func__); + + if (db->tx_pkt_cnt > 1) + return NETDEV_TX_BUSY; + + spin_lock_irqsave(&db->lock, flags); + + /* Move data to DM9000 TX RAM */ + writeb(DM9000_MWCMD, db->io_addr); + + (db->outblk)(db->io_data, skb->data, skb->len); + dev->stats.tx_bytes += skb->len; + + db->tx_pkt_cnt++; + /* TX control: First packet immediately send, second packet queue */ + if (db->tx_pkt_cnt == 1) { + dm9000_send_packet(dev, skb->ip_summed, skb->len); + } else { + /* Second packet */ + db->queue_pkt_len = skb->len; + db->queue_ip_summed = skb->ip_summed; + netif_stop_queue(dev); + } + + spin_unlock_irqrestore(&db->lock, flags); + + /* free this SKB */ + dev_consume_skb_any(skb); + + return NETDEV_TX_OK; +} + +/* + * DM9000 interrupt handler + * receive the packet to upper layer, free the transmitted packet + */ + +static void dm9000_tx_done(struct net_device *dev, board_info_t *db) +{ + int tx_status = ior(db, DM9000_NSR); /* Got TX status */ + + if (tx_status & (NSR_TX2END | NSR_TX1END)) { + /* One packet sent complete */ + db->tx_pkt_cnt--; + dev->stats.tx_packets++; + + if (netif_msg_tx_done(db)) + dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status); + + /* Queue packet check & send */ + if (db->tx_pkt_cnt > 0) + dm9000_send_packet(dev, db->queue_ip_summed, + db->queue_pkt_len); + netif_wake_queue(dev); + } +} + +struct dm9000_rxhdr { + u8 RxPktReady; + u8 RxStatus; + __le16 RxLen; +} __packed; + +/* + * Received a packet and pass to upper layer + */ +static void +dm9000_rx(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + struct dm9000_rxhdr rxhdr; + struct sk_buff *skb; + u8 rxbyte, *rdptr; + bool GoodPacket; + int RxLen; + + /* Check packet ready or not */ + do { + ior(db, DM9000_MRCMDX); /* Dummy read */ + + /* Get most updated data */ + rxbyte = readb(db->io_data); + + /* Status check: this byte must be 0 or 1 */ + if (rxbyte & DM9000_PKT_ERR) { + dev_warn(db->dev, "status check fail: %d\n", rxbyte); + iow(db, DM9000_RCR, 0x00); /* Stop Device */ + return; + } + + if (!(rxbyte & DM9000_PKT_RDY)) + return; + + /* A packet ready now & Get status/length */ + GoodPacket = true; + writeb(DM9000_MRCMD, db->io_addr); + + (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr)); + + RxLen = le16_to_cpu(rxhdr.RxLen); + + if (netif_msg_rx_status(db)) + dev_dbg(db->dev, "RX: status %02x, length %04x\n", + rxhdr.RxStatus, RxLen); + + /* Packet Status check */ + if (RxLen < 0x40) { + GoodPacket = false; + if (netif_msg_rx_err(db)) + dev_dbg(db->dev, "RX: Bad Packet (runt)\n"); + } + + if (RxLen > DM9000_PKT_MAX) { + dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen); + } + + /* rxhdr.RxStatus is identical to RSR register. */ + if (rxhdr.RxStatus & (RSR_FOE | RSR_CE | RSR_AE | + RSR_PLE | RSR_RWTO | + RSR_LCS | RSR_RF)) { + GoodPacket = false; + if (rxhdr.RxStatus & RSR_FOE) { + if (netif_msg_rx_err(db)) + dev_dbg(db->dev, "fifo error\n"); + dev->stats.rx_fifo_errors++; + } + if (rxhdr.RxStatus & RSR_CE) { + if (netif_msg_rx_err(db)) + dev_dbg(db->dev, "crc error\n"); + dev->stats.rx_crc_errors++; + } + if (rxhdr.RxStatus & RSR_RF) { + if (netif_msg_rx_err(db)) + dev_dbg(db->dev, "length error\n"); + dev->stats.rx_length_errors++; + } + } + + /* Move data from DM9000 */ + if (GoodPacket && + ((skb = netdev_alloc_skb(dev, RxLen + 4)) != NULL)) { + skb_reserve(skb, 2); + rdptr = (u8 *) skb_put(skb, RxLen - 4); + + /* Read received packet from RX SRAM */ + + (db->inblk)(db->io_data, rdptr, RxLen); + dev->stats.rx_bytes += RxLen; + + /* Pass to upper layer */ + skb->protocol = eth_type_trans(skb, dev); + if (dev->features & NETIF_F_RXCSUM) { + if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb_checksum_none_assert(skb); + } + netif_rx(skb); + dev->stats.rx_packets++; + + } else { + /* need to dump the packet's data */ + + (db->dumpblk)(db->io_data, RxLen); + } + } while (rxbyte & DM9000_PKT_RDY); +} + +static irqreturn_t dm9000_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + board_info_t *db = netdev_priv(dev); + int int_status; + unsigned long flags; + u8 reg_save; + + dm9000_dbg(db, 3, "entering %s\n", __func__); + + /* A real interrupt coming */ + + /* holders of db->lock must always block IRQs */ + spin_lock_irqsave(&db->lock, flags); + + /* Save previous register address */ + reg_save = readb(db->io_addr); + + dm9000_mask_interrupts(db); + /* Got DM9000 interrupt status */ + int_status = ior(db, DM9000_ISR); /* Got ISR */ + iow(db, DM9000_ISR, int_status); /* Clear ISR status */ + + if (netif_msg_intr(db)) + dev_dbg(db->dev, "interrupt status %02x\n", int_status); + + /* Received the coming packet */ + if (int_status & ISR_PRS) + dm9000_rx(dev); + + /* Trnasmit Interrupt check */ + if (int_status & ISR_PTS) + dm9000_tx_done(dev, db); + + if (db->type != TYPE_DM9000E) { + if (int_status & ISR_LNKCHNG) { + /* fire a link-change request */ + schedule_delayed_work(&db->phy_poll, 1); + } + } + + dm9000_unmask_interrupts(db); + /* Restore previous register address */ + writeb(reg_save, db->io_addr); + + spin_unlock_irqrestore(&db->lock, flags); + + return IRQ_HANDLED; +} + +static irqreturn_t dm9000_wol_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + board_info_t *db = netdev_priv(dev); + unsigned long flags; + unsigned nsr, wcr; + + spin_lock_irqsave(&db->lock, flags); + + nsr = ior(db, DM9000_NSR); + wcr = ior(db, DM9000_WCR); + + dev_dbg(db->dev, "%s: NSR=0x%02x, WCR=0x%02x\n", __func__, nsr, wcr); + + if (nsr & NSR_WAKEST) { + /* clear, so we can avoid */ + iow(db, DM9000_NSR, NSR_WAKEST); + + if (wcr & WCR_LINKST) + dev_info(db->dev, "wake by link status change\n"); + if (wcr & WCR_SAMPLEST) + dev_info(db->dev, "wake by sample packet\n"); + if (wcr & WCR_MAGICST) + dev_info(db->dev, "wake by magic packet\n"); + if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST))) + dev_err(db->dev, "wake signalled with no reason? " + "NSR=0x%02x, WSR=0x%02x\n", nsr, wcr); + } + + spin_unlock_irqrestore(&db->lock, flags); + + return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +/* + *Used by netconsole + */ +static void dm9000_poll_controller(struct net_device *dev) +{ + disable_irq(dev->irq); + dm9000_interrupt(dev->irq, dev); + enable_irq(dev->irq); +} +#endif + +/* + * Open the interface. + * The interface is opened whenever "ifconfig" actives it. + */ +static int +dm9000_open(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK; + + if (netif_msg_ifup(db)) + dev_dbg(db->dev, "enabling %s\n", dev->name); + + /* If there is no IRQ type specified, default to something that + * may work, and tell the user that this is a problem */ + + if (irqflags == IRQF_TRIGGER_NONE) + irqflags = irq_get_trigger_type(dev->irq); + + if (irqflags == IRQF_TRIGGER_NONE) + dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n"); + + irqflags |= IRQF_SHARED; + + /* GPIO0 on pre-activate PHY, Reg 1F is not set by reset */ + iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */ + mdelay(1); /* delay needs by DM9000B */ + + /* Initialize DM9000 board */ + dm9000_init_dm9000(dev); + + if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev)) + return -EAGAIN; + /* Now that we have an interrupt handler hooked up we can unmask + * our interrupts + */ + dm9000_unmask_interrupts(db); + + /* Init driver variable */ + db->dbug_cnt = 0; + + mii_check_media(&db->mii, netif_msg_link(db), 1); + netif_start_queue(dev); + + /* Poll initial link status */ + schedule_delayed_work(&db->phy_poll, 1); + + return 0; +} + +static void +dm9000_shutdown(struct net_device *dev) +{ + board_info_t *db = netdev_priv(dev); + + /* RESET device */ + dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */ + iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */ + dm9000_mask_interrupts(db); + iow(db, DM9000_RCR, 0x00); /* Disable RX */ +} + +/* + * Stop the interface. + * The interface is stopped when it is brought. + */ +static int +dm9000_stop(struct net_device *ndev) +{ + board_info_t *db = netdev_priv(ndev); + + if (netif_msg_ifdown(db)) + dev_dbg(db->dev, "shutting down %s\n", ndev->name); + + cancel_delayed_work_sync(&db->phy_poll); + + netif_stop_queue(ndev); + netif_carrier_off(ndev); + + /* free interrupt */ + free_irq(ndev->irq, ndev); + + dm9000_shutdown(ndev); + + return 0; +} + +static const struct net_device_ops dm9000_netdev_ops = { + .ndo_open = dm9000_open, + .ndo_stop = dm9000_stop, + .ndo_start_xmit = dm9000_start_xmit, + .ndo_tx_timeout = dm9000_timeout, + .ndo_set_rx_mode = dm9000_hash_table, + .ndo_do_ioctl = dm9000_ioctl, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_features = dm9000_set_features, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = dm9000_poll_controller, +#endif +}; + +static struct dm9000_plat_data *dm9000_parse_dt(struct device *dev) +{ + struct dm9000_plat_data *pdata; + struct device_node *np = dev->of_node; + const void *mac_addr; + + if (!IS_ENABLED(CONFIG_OF) || !np) + return NULL; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + if (of_find_property(np, "davicom,ext-phy", NULL)) + pdata->flags |= DM9000_PLATF_EXT_PHY; + if (of_find_property(np, "davicom,no-eeprom", NULL)) + pdata->flags |= DM9000_PLATF_NO_EEPROM; + + mac_addr = of_get_mac_address(np); + if (mac_addr) + memcpy(pdata->dev_addr, mac_addr, sizeof(pdata->dev_addr)); + + return pdata; +} + +/* + * Search DM9000 board, allocate space and register it + */ +static int +dm9000_probe(struct platform_device *pdev) +{ + struct dm9000_plat_data *pdata = dev_get_platdata(&pdev->dev); + struct board_info *db; /* Point a board information structure */ + struct net_device *ndev; + const unsigned char *mac_src; + int ret = 0; + int iosize; + int i; + u32 id_val; + + if (!pdata) { + pdata = dm9000_parse_dt(&pdev->dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } + + /* Init network device */ + ndev = alloc_etherdev(sizeof(struct board_info)); + if (!ndev) + return -ENOMEM; + + SET_NETDEV_DEV(ndev, &pdev->dev); + + dev_dbg(&pdev->dev, "dm9000_probe()\n"); + + /* setup board info structure */ + db = netdev_priv(ndev); + + db->dev = &pdev->dev; + db->ndev = ndev; + + spin_lock_init(&db->lock); + mutex_init(&db->addr_lock); + + INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work); + + db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + + if (db->addr_res == NULL || db->data_res == NULL || + db->irq_res == NULL) { + dev_err(db->dev, "insufficient resources\n"); + ret = -ENOENT; + goto out; + } + + db->irq_wake = platform_get_irq(pdev, 1); + if (db->irq_wake >= 0) { + dev_dbg(db->dev, "wakeup irq %d\n", db->irq_wake); + + ret = request_irq(db->irq_wake, dm9000_wol_interrupt, + IRQF_SHARED, dev_name(db->dev), ndev); + if (ret) { + dev_err(db->dev, "cannot get wakeup irq (%d)\n", ret); + } else { + + /* test to see if irq is really wakeup capable */ + ret = irq_set_irq_wake(db->irq_wake, 1); + if (ret) { + dev_err(db->dev, "irq %d cannot set wakeup (%d)\n", + db->irq_wake, ret); + ret = 0; + } else { + irq_set_irq_wake(db->irq_wake, 0); + db->wake_supported = 1; + } + } + } + + iosize = resource_size(db->addr_res); + db->addr_req = request_mem_region(db->addr_res->start, iosize, + pdev->name); + + if (db->addr_req == NULL) { + dev_err(db->dev, "cannot claim address reg area\n"); + ret = -EIO; + goto out; + } + + db->io_addr = ioremap(db->addr_res->start, iosize); + + if (db->io_addr == NULL) { + dev_err(db->dev, "failed to ioremap address reg\n"); + ret = -EINVAL; + goto out; + } + + iosize = resource_size(db->data_res); + db->data_req = request_mem_region(db->data_res->start, iosize, + pdev->name); + + if (db->data_req == NULL) { + dev_err(db->dev, "cannot claim data reg area\n"); + ret = -EIO; + goto out; + } + + db->io_data = ioremap(db->data_res->start, iosize); + + if (db->io_data == NULL) { + dev_err(db->dev, "failed to ioremap data reg\n"); + ret = -EINVAL; + goto out; + } + + /* fill in parameters for net-dev structure */ + ndev->base_addr = (unsigned long)db->io_addr; + ndev->irq = db->irq_res->start; + + /* ensure at least we have a default set of IO routines */ + dm9000_set_io(db, iosize); + + /* check to see if anything is being over-ridden */ + if (pdata != NULL) { + /* check to see if the driver wants to over-ride the + * default IO width */ + + if (pdata->flags & DM9000_PLATF_8BITONLY) + dm9000_set_io(db, 1); + + if (pdata->flags & DM9000_PLATF_16BITONLY) + dm9000_set_io(db, 2); + + if (pdata->flags & DM9000_PLATF_32BITONLY) + dm9000_set_io(db, 4); + + /* check to see if there are any IO routine + * over-rides */ + + if (pdata->inblk != NULL) + db->inblk = pdata->inblk; + + if (pdata->outblk != NULL) + db->outblk = pdata->outblk; + + if (pdata->dumpblk != NULL) + db->dumpblk = pdata->dumpblk; + + db->flags = pdata->flags; + } + +#ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL + db->flags |= DM9000_PLATF_SIMPLE_PHY; +#endif + + dm9000_reset(db); + + /* try multiple times, DM9000 sometimes gets the read wrong */ + for (i = 0; i < 8; i++) { + id_val = ior(db, DM9000_VIDL); + id_val |= (u32)ior(db, DM9000_VIDH) << 8; + id_val |= (u32)ior(db, DM9000_PIDL) << 16; + id_val |= (u32)ior(db, DM9000_PIDH) << 24; + + if (id_val == DM9000_ID) + break; + dev_err(db->dev, "read wrong id 0x%08x\n", id_val); + } + + if (id_val != DM9000_ID) { + dev_err(db->dev, "wrong id: 0x%08x\n", id_val); + ret = -ENODEV; + goto out; + } + + /* Identify what type of DM9000 we are working on */ + + id_val = ior(db, DM9000_CHIPR); + dev_dbg(db->dev, "dm9000 revision 0x%02x\n", id_val); + + switch (id_val) { + case CHIPR_DM9000A: + db->type = TYPE_DM9000A; + break; + case CHIPR_DM9000B: + db->type = TYPE_DM9000B; + break; + default: + dev_dbg(db->dev, "ID %02x => defaulting to DM9000E\n", id_val); + db->type = TYPE_DM9000E; + } + + /* dm9000a/b are capable of hardware checksum offload */ + if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) { + ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM; + ndev->features |= ndev->hw_features; + } + + /* from this point we assume that we have found a DM9000 */ + + /* driver system function */ + ether_setup(ndev); + + ndev->netdev_ops = &dm9000_netdev_ops; + ndev->watchdog_timeo = msecs_to_jiffies(watchdog); + ndev->ethtool_ops = &dm9000_ethtool_ops; + + db->msg_enable = NETIF_MSG_LINK; + db->mii.phy_id_mask = 0x1f; + db->mii.reg_num_mask = 0x1f; + db->mii.force_media = 0; + db->mii.full_duplex = 0; + db->mii.dev = ndev; + db->mii.mdio_read = dm9000_phy_read; + db->mii.mdio_write = dm9000_phy_write; + + mac_src = "eeprom"; + + /* try reading the node address from the attached EEPROM */ + for (i = 0; i < 6; i += 2) + dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i); + + if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) { + mac_src = "platform data"; + memcpy(ndev->dev_addr, pdata->dev_addr, ETH_ALEN); + } + + if (!is_valid_ether_addr(ndev->dev_addr)) { + /* try reading from mac */ + + mac_src = "chip"; + for (i = 0; i < 6; i++) + ndev->dev_addr[i] = ior(db, i+DM9000_PAR); + } + + if (!is_valid_ether_addr(ndev->dev_addr)) { + dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please " + "set using ifconfig\n", ndev->name); + + eth_hw_addr_random(ndev); + mac_src = "random"; + } + + + platform_set_drvdata(pdev, ndev); + ret = register_netdev(ndev); + + if (ret == 0) + printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n", + ndev->name, dm9000_type_to_char(db->type), + db->io_addr, db->io_data, ndev->irq, + ndev->dev_addr, mac_src); + return 0; + +out: + dev_err(db->dev, "not found (%d).\n", ret); + + dm9000_release_board(pdev, db); + free_netdev(ndev); + + return ret; +} + +static int +dm9000_drv_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct net_device *ndev = platform_get_drvdata(pdev); + board_info_t *db; + + if (ndev) { + db = netdev_priv(ndev); + db->in_suspend = 1; + + if (!netif_running(ndev)) + return 0; + + netif_device_detach(ndev); + + /* only shutdown if not using WoL */ + if (!db->wake_state) + dm9000_shutdown(ndev); + } + return 0; +} + +static int +dm9000_drv_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct net_device *ndev = platform_get_drvdata(pdev); + board_info_t *db = netdev_priv(ndev); + + if (ndev) { + if (netif_running(ndev)) { + /* reset if we were not in wake mode to ensure if + * the device was powered off it is in a known state */ + if (!db->wake_state) { + dm9000_init_dm9000(ndev); + dm9000_unmask_interrupts(db); + } + + netif_device_attach(ndev); + } + + db->in_suspend = 0; + } + return 0; +} + +static const struct dev_pm_ops dm9000_drv_pm_ops = { + .suspend = dm9000_drv_suspend, + .resume = dm9000_drv_resume, +}; + +static int +dm9000_drv_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + + unregister_netdev(ndev); + dm9000_release_board(pdev, netdev_priv(ndev)); + free_netdev(ndev); /* free device structure */ + + dev_dbg(&pdev->dev, "released and freed device\n"); + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id dm9000_of_matches[] = { + { .compatible = "davicom,dm9000", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, dm9000_of_matches); +#endif + +static struct platform_driver dm9000_driver = { + .driver = { + .name = "dm9000", + .owner = THIS_MODULE, + .pm = &dm9000_drv_pm_ops, + .of_match_table = of_match_ptr(dm9000_of_matches), + }, + .probe = dm9000_probe, + .remove = dm9000_drv_remove, +}; + +module_platform_driver(dm9000_driver); + +MODULE_AUTHOR("Sascha Hauer, Ben Dooks"); +MODULE_DESCRIPTION("Davicom DM9000 network driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:dm9000"); |