硬件平臺：FL2440 （S3C2440）

內(nèi)核版本：2.6.35

主機平臺：Ubuntu 11.04

內(nèi)核版本：2.6.39

交叉編譯器：arm-linux-gcc 4.3.2

原創(chuàng)作品，轉(zhuǎn)載請標明出處

本文接上文

ARM-Linux驅(qū)動--DM9000網(wǎng)卡驅(qū)動分析（一）

ARM-Linux驅(qū)動--DM9000網(wǎng)卡驅(qū)動分析（二）

ARM-Linux驅(qū)動--DM9000網(wǎng)卡驅(qū)動分析（三）

1、接下來接著分析DM9000網(wǎng)卡驅(qū)動的數(shù)據(jù)接收函數(shù)

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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;

do {

ior(db, DM9000_MRCMDX);

rxbyte = readb(db->io_data);

if (rxbyte & DM9000_PKT_ERR) {

dev_warn(db->dev, "status check fail: %dn", rxbyte);

iow(db, DM9000_RCR, 0x00);

iow(db, DM9000_ISR, IMR_PAR);

return;

}

if (!(rxbyte & DM9000_PKT_RDY))

return;

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 x, length xn",

rxhdr.RxStatus, RxLen);

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:%xn", RxLen);

}

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 errorn");

dev->stats.rx_fifo_errors++;

}

if (rxhdr.RxStatus & RSR_CE) {

if (netif_msg_rx_err(db))

dev_dbg(db->dev, "crc errorn");

dev->stats.rx_crc_errors++;

}

if (rxhdr.RxStatus & RSR_RF) {

if (netif_msg_rx_err(db))

dev_dbg(db->dev, "length errorn");

dev->stats.rx_length_errors++;

}

}

if (GoodPacket &&

((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {

skb_reserve(skb, 2);

rdptr = (u8 *) skb_put(skb, RxLen - 4);

(db->inblk)(db->io_data, rdptr, RxLen);

dev->stats.rx_bytes += RxLen;

skb->protocol = eth_type_trans(skb, dev);

if (db->rx_csum) {

if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)

skb->ip_summed = CHECKSUM_UNNECESSARY;

else

skb->ip_summed = CHECKSUM_NONE;

}

netif_rx(skb);

dev->stats.rx_packets++;

} else {

(db->dumpblk)(db->io_data, RxLen);

}

} while (rxbyte & DM9000_PKT_RDY);

}

2、下面是完整的DM9000驅(qū)動代碼，可以完整的查看

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#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include "dm9000.h"

#include

#include

#include

#define DM9000_PHY 0x40

#define CARDNAME "dm9000"

#define DRV_VERSION "1.31"

static int watchdog = 5000;

module_param(watchdog, int, 0400);

MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");

enum dm9000_type {

TYPE_DM9000E,

TYPE_DM9000A,

TYPE_DM9000B

};

typedef struct board_info {

void __iomem *io_addr;

void __iomem *io_data;

u16 irq;

u16 tx_pkt_cnt;

u16 queue_pkt_len;

u16 queue_start_addr;

u16 queue_ip_summed;

u16 dbug_cnt;

u8 io_mode;

u8 phy_addr;

u8 imr_all;

unsigned int flags;

unsigned int in_suspend :1;

unsigned int wake_supported :1;

int debug_level;

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;

struct resource *addr_res;

struct resource *data_res;

struct resource *addr_req;

struct resource *data_req;

struct resource *irq_res;

int irq_wake;

struct mutex addr_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 rx_csum;

int can_csum;

int ip_summed;

} board_info_t;

#define dm9000_dbg(db, lev, msg...) do {

if ((lev) < CONFIG_DM9000_DEBUGLEVEL &&

(lev) < db->debug_level) {

dev_dbg(db->dev, msg);

}

} while (0)

static inline board_info_t *to_dm9000_board(struct net_device *dev)

{

return netdev_priv(dev);

}

static void

dm9000_reset(board_info_t * db)

{

dev_dbg(db->dev, "resetting devicen");

writeb(DM9000_NCR, db->io_addr);

udelay(200);

writeb(NCR_RST, db->io_data);

udelay(200);

}

static u8

ior(board_info_t * db, int reg)

{

writeb(reg, db->io_addr);

return readb(db->io_data);

}

static void

iow(board_info_t * db, int reg, int value)

{

writeb(reg, db->io_addr);

writeb(value, db->io_data);

}

static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)

{

writesb(reg, data, count);

}

static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)

{

writesw(reg, data, (count+1) >> 1);

}

static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)

{

writesl(reg, data, (count+3) >> 2);

}

static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)

{

readsb(reg, data, count);

}

static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)

{

readsw(reg, data, (count+1) >> 1);

}

static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)

{

readsl(reg, data, (count+3) >> 2);

}

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);

}

static void dm9000_set_io(struct board_info *db, int byte_width)

{

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 16bitn");

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;

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 EEPROMn");

break;

}

}

return 0;

}

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);

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);

}

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);

spin_lock_irqsave(&db->lock, flags);

iow(db, DM9000_EPCR, 0);

spin_unlock_irqrestore(&db->lock, flags);

mutex_unlock(&db->addr_lock);

}

static void dm9000_get_drvinfo(struct net_device *dev,

struct ethtool_drvinfo *info)

{

board_info_t *dm = to_dm9000_board(dev);

strcpy(info->driver, CARDNAME);

strcpy(info->version, DRV_VERSION);

strcpy(info->bus_info, to_platform_device(dm->dev)->name);

}

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 uint32_t dm9000_get_rx_csum(struct net_device *dev)

{

board_info_t *dm = to_dm9000_board(dev);

return dm->rx_csum;

}

static int dm9000_set_rx_csum_unlocked(struct net_device *dev, uint32_t data)

{

board_info_t *dm = to_dm9000_board(dev);

if (dm->can_csum) {

dm->rx_csum = data;

iow(dm, DM9000_RCSR, dm->rx_csum ? RCSR_CSUM : 0);

return 0;

}

return -EOPNOTSUPP;

}

static int dm9000_set_rx_csum(struct net_device *dev, uint32_t data)

{

board_info_t *dm = to_dm9000_board(dev);

unsigned long flags;

int ret;

spin_lock_irqsave(&dm->lock, flags);

ret = dm9000_set_rx_csum_unlocked(dev, data);

spin_unlock_irqrestore(&dm->lock, flags);

return ret;

}

static int dm9000_set_tx_csum(struct net_device *dev, uint32_t data)

{

board_info_t *dm = to_dm9000_board(dev);

int ret = -EOPNOTSUPP;

if (dm->can_csum)

ret = ethtool_op_set_tx_csum(dev, data);

return ret;

}

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;

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 i;

if ((len & 1) != 0 || (offset & 1) != 0)

return -EINVAL;

if (dm->flags & DM9000_PLATF_NO_EEPROM)

return -ENOENT;

if (ee->magic != DM_EEPROM_MAGIC)

return -EINVAL;

for (i = 0; i < len; i += 2)

dm9000_write_eeprom(dm, (offset + i) / 2, data + i);

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));

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) {

if (!dm->wake_state)

set_irq_wake(dm->irq_wake, 1);

else if (dm->wake_state & !opts)

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,

.get_rx_csum = dm9000_get_rx_csum,

.set_rx_csum = dm9000_set_rx_csum,

.get_tx_csum = ethtool_op_get_tx_csum,

.set_tx_csum = dm9000_set_tx_csum,

};

static void dm9000_show_carrier(board_info_t *db,

unsigned carrier, unsigned nsr)

{

struct net_device *ndev = db->ndev;

unsigned ncr = dm9000_read_locked(db, DM9000_NCR);

if (carrier)

dev_info(db->dev, "%s: link up, %dMbps, %s-duplex, no LPAn",

ndev->name, (nsr & NSR_SPEED) ? 10 : 100,

(ncr & NCR_FDX) ? "full" : "half");

else

dev_info(db->dev, "%s: link downn", 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);

}

static void

dm9000_release_board(struct platform_device *pdev, struct board_info *db)

{

iounmap(db->io_addr);

iounmap(db->io_data);

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 ?;

}

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];

u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;

dm9000_dbg(db, 1, "entering %sn", __func__);

for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)

iow(db, oft, dev->dev_addr[i]);

for (i = 0; i < 4; i++)

hash_table[i] = 0x0;

hash_table[3] = 0x8000;

if (dev->flags & IFF_PROMISC)

rcr |= RCR_PRMSC;

if (dev->flags & IFF_ALLMULTI)

rcr |= RCR_ALL;

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);

}

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_init_dm9000(struct net_device *dev)

{

board_info_t *db = netdev_priv(dev);

unsigned int imr;

unsigned int ncr;

dm9000_dbg(db, 1, "entering %sn", __func__);

db->io_mode = ior(db, DM9000_ISR) >> 6;

dm9000_set_rx_csum_unlocked(dev, db->rx_csum);

iow(db, DM9000_GPR, 0);

iow(db, DM9000_GPCR, GPCR_GEP_CNTL);

iow(db, DM9000_GPR, 0);

ncr = (db->flags & DM9000_PLATF_EXT_PHY) ? NCR_EXT_PHY : 0;

if (db->wake_supported)

ncr |= NCR_WAKEEN;

iow(db, DM9000_NCR, ncr);

iow(db, DM9000_TCR, 0);

iow(db, DM9000_BPTR, 0x3f);

iow(db, DM9000_FCR, 0xff);

iow(db, DM9000_SMCR, 0);

iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);

iow(db, DM9000_ISR, ISR_CLR_STATUS);

dm9000_hash_table_unlocked(dev);

imr = IMR_PAR | IMR_PTM | IMR_PRM;

if (db->type != TYPE_DM9000E)

imr |= IMR_LNKCHNG;

db->imr_all = imr;

iow(db, DM9000_IMR, imr);

db->tx_pkt_cnt = 0;

db->queue_pkt_len = 0;

dev->trans_start = jiffies;

}

static void dm9000_timeout(struct net_device *dev)

{

board_info_t *db = netdev_priv(dev);

u8 reg_save;

unsigned long flags;

reg_save = readb(db->io_addr);

spin_lock_irqsave(&db->lock, flags);

netif_stop_queue(dev);

dm9000_reset(db);

dm9000_init_dm9000(dev);

dev->trans_start = jiffies;

netif_wake_queue(dev);

writeb(reg_save, db->io_addr);

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);

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;

}

iow(dm, DM9000_TXPLL, pkt_len);

iow(dm, DM9000_TXPLH, pkt_len >> 8);

iow(dm, DM9000_TCR, TCR_TXREQ);

}

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);

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++;

if (db->tx_pkt_cnt == 1) {

dm9000_send_packet(dev, skb->ip_summed, skb->len);

} else {

db->queue_pkt_len = skb->len;

db->queue_ip_summed = skb->ip_summed;

netif_stop_queue(dev);

}

spin_unlock_irqrestore(&db->lock, flags);

dev_kfree_skb(skb);

return NETDEV_TX_OK;

}

static void dm9000_tx_done(struct net_device *dev, board_info_t *db)

{

int tx_status = ior(db, DM9000_NSR);

if (tx_status & (NSR_TX2END | NSR_TX1END)) {

db->tx_pkt_cnt--;

dev->stats.tx_packets++;

if (netif_msg_tx_done(db))

dev_dbg(db->dev, "tx done, NSR xn", tx_status);

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;

} __attribute__((__packed__));

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;

do {

ior(db, DM9000_MRCMDX);

rxbyte = readb(db->io_data);

if (rxbyte & DM9000_PKT_ERR) {

dev_warn(db->dev, "status check fail: %dn", rxbyte);

iow(db, DM9000_RCR, 0x00);

iow(db, DM9000_ISR, IMR_PAR);

return;

}

if (!(rxbyte & DM9000_PKT_RDY))

return;

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 x, length xn",

rxhdr.RxStatus, RxLen);

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:%xn", RxLen);

}

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 errorn");

dev->stats.rx_fifo_errors++;

}

if (rxhdr.RxStatus & RSR_CE) {

if (netif_msg_rx_err(db))

dev_dbg(db->dev, "crc errorn");

dev->stats.rx_crc_errors++;

}

if (rxhdr.RxStatus & RSR_RF) {

if (netif_msg_rx_err(db))

dev_dbg(db->dev, "length errorn");

dev->stats.rx_length_errors++;

}

}

if (GoodPacket &&

((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {

skb_reserve(skb, 2);

rdptr = (u8 *) skb_put(skb, RxLen - 4);

(db->inblk)(db->io_data, rdptr, RxLen);

dev->stats.rx_bytes += RxLen;

skb->protocol = eth_type_trans(skb, dev);

if (db->rx_csum) {

if ((((rxbyte & 0x1c) << 3) & rxbyte) == 0)

skb->ip_summed = CHECKSUM_UNNECESSARY;

else

skb->ip_summed = CHECKSUM_NONE;

}

netif_rx(skb);

dev->stats.rx_packets++;

} else {

(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 %sn", __func__);

spin_lock_irqsave(&db->lock, flags);

reg_save = readb(db->io_addr);

iow(db, DM9000_IMR, IMR_PAR);

int_status = ior(db, DM9000_ISR);

iow(db, DM9000_ISR, int_status);

if (netif_msg_intr(db))

dev_dbg(db->dev, "interrupt status xn", int_status);

if (int_status & ISR_PRS)

dm9000_rx(dev);

if (int_status & ISR_PTS)

dm9000_tx_done(dev, db);

if (db->type != TYPE_DM9000E) {

if (int_status & ISR_LNKCHNG) {

schedule_delayed_work(&db->phy_poll, 1);

}

}

iow(db, DM9000_IMR, db->imr_all);

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=0xx, WCR=0xxn", __func__, nsr, wcr);

if (nsr & NSR_WAKEST) {

iow(db, DM9000_NSR, NSR_WAKEST);

if (wcr & WCR_LINKST)

dev_info(db->dev, "wake by link status changen");

if (wcr & WCR_SAMPLEST)

dev_info(db->dev, "wake by sample packetn");

if (wcr & WCR_MAGICST )

dev_info(db->dev, "wake by magic packetn");

if (!(wcr & (WCR_LINKST | WCR_SAMPLEST | WCR_MAGICST)))

dev_err(db->dev, "wake signalled with no reason? "

"NSR=0xx, WSR=0xxn", nsr, wcr);

}

spin_unlock_irqrestore(&db->lock, flags);

return (nsr & NSR_WAKEST) ? IRQ_HANDLED : IRQ_NONE;

}

#ifdef CONFIG_NET_POLL_CONTROLLER

static void dm9000_poll_controller(struct net_device *dev)

{

disable_irq(dev->irq);

dm9000_interrupt(dev->irq, dev);

enable_irq(dev->irq);

}

#endif

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 %sn", dev->name);

if (irqflags == IRQF_TRIGGER_NONE)

dev_warn(db->dev, "WARNING: no IRQ resource flags set.n");

irqflags |= IRQF_SHARED;

if (request_irq(dev->irq, dm9000_interrupt, irqflags, dev->name, dev))

return -EAGAIN;

dm9000_reset(db);

dm9000_init_dm9000(dev);

db->dbug_cnt = 0;

mii_check_media(&db->mii, netif_msg_link(db), 1);

netif_start_queue(dev);

dm9000_schedule_poll(db);

return 0;

}

static void dm9000_msleep(board_info_t *db, unsigned int ms)

{

if (db->in_suspend)

mdelay(ms);

else

msleep(ms);

}

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);

reg_save = readb(db->io_addr);

iow(db, DM9000_EPAR, DM9000_PHY | reg);

iow(db, DM9000_EPCR, EPCR_ERPRR | EPCR_EPOS);

writeb(reg_save, db->io_addr);

spin_unlock_irqrestore(&db->lock,flags);

dm9000_msleep(db, 1);

spin_lock_irqsave(&db->lock,flags);

reg_save = readb(db->io_addr);

iow(db, DM9000_EPCR, 0x0);

ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);

writeb(reg_save, db->io_addr);

spin_unlock_irqrestore(&db->lock,flags);

mutex_unlock(&db->addr_lock);

dm9000_dbg(db, 5, "phy_read[x] -> xn", reg, ret);

return ret;

}

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[x] = xn", reg, value);

mutex_lock(&db->addr_lock);

spin_lock_irqsave(&db->lock,flags);

reg_save = readb(db->io_addr);

iow(db, DM9000_EPAR, DM9000_PHY | reg);

iow(db, DM9000_EPDRL, value);

iow(db, DM9000_EPDRH, value >> 8);

iow(db, DM9000_EPCR, EPCR_EPOS | EPCR_ERPRW);

writeb(reg_save, db->io_addr);

spin_unlock_irqrestore(&db->lock, flags);

dm9000_msleep(db, 1);

spin_lock_irqsave(&db->lock,flags);

reg_save = readb(db->io_addr);

iow(db, DM9000_EPCR, 0x0);

writeb(reg_save, db->io_addr);

spin_unlock_irqrestore(&db->lock, flags);

mutex_unlock(&db->addr_lock);

}

static void

dm9000_shutdown(struct net_device *dev)

{

board_info_t *db = netdev_priv(dev);

dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET);

iow(db, DM9000_GPR, 0x01);

iow(db, DM9000_IMR, IMR_PAR);

iow(db, DM9000_RCR, 0x00);

}

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 %sn", ndev->name);

cancel_delayed_work_sync(&db->phy_poll);

netif_stop_queue(ndev);

netif_carrier_off(ndev);

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_multicast_list = dm9000_hash_table,

.ndo_do_ioctl = dm9000_ioctl,

.ndo_change_mtu = eth_change_mtu,

.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 int __devinit

dm9000_probe(struct platform_device *pdev)

{

struct dm9000_plat_data *pdata = pdev->dev.platform_data;

struct board_info *db;

struct net_device *ndev;

const unsigned char *mac_src;

int ret = 0;

int iosize;

int i;

u32 id_val;

unsigned char ne_def_eth_mac_addr[]={0x00,0x12,0x34,0x56,0x80,0x49};

static void *bwscon;

static void *gpfcon;

static void *extint0;

static void *intmsk;

#define BWSCON (0x48000000)

#define GPFCON (0x56000050)

#define EXTINT0 (0x56000088)

#define INTMSK (0x4A000008)

bwscon=ioremap_nocache(BWSCON,0x0000004);

gpfcon=ioremap_nocache(GPFCON,0x0000004);

extint0=ioremap_nocache(EXTINT0,0x0000004);

intmsk=ioremap_nocache(INTMSK,0x0000004);

writel( readl(bwscon)|0xc0000,bwscon);

writel( (readl(gpfcon) & ~(0x3 << 14)) | (0x2 << 14), gpfcon);

writel( readl(gpfcon) | (0x1 << 7), gpfcon); // Disable pull-up，不使能上拉

writel( (readl(extint0) & ~(0xf << 28)) | (0x4 << 28), extint0); //rising edge，設(shè)置上升沿觸發(fā)中斷

writel( (readl(intmsk)) & ~0x80, intmsk);

ndev = alloc_etherdev(sizeof(struct board_info));

if (!ndev) {

dev_err(&pdev->dev, "could not allocate device.n");

return -ENOMEM;

}

SET_NETDEV_DEV(ndev, &pdev->dev);

dev_dbg(&pdev->dev, "dm9000_probe()n");

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 resourcesn");

ret = -ENOENT;

goto out;

}

db->irq_wake = platform_get_irq(pdev, 1);

if (db->irq_wake >= 0) {

dev_dbg(db->dev, "wakeup irq %dn", 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 {

ret = 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 {

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 arean");

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 regn");

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 arean");

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 regn");

ret = -EINVAL;

goto out;

}

ndev->base_addr = (unsigned long)db->io_addr;

ndev->irq = db->irq_res->start;

dm9000_set_io(db, iosize);

if (pdata != NULL) {

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);

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);

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 0xxn", id_val);

}

if (id_val != DM9000_ID) {

dev_err(db->dev, "wrong id: 0xxn", id_val);

ret = -ENODEV;

goto out;

}

id_val = ior(db, DM9000_CHIPR);

dev_dbg(db->dev, "dm9000 revision 0xxn", 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 x => defaulting to DM9000En", id_val);

db->type = TYPE_DM9000E;

}

if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) {

db->can_csum = 1;

db->rx_csum = 1;

ndev->features |= NETIF_F_IP_CSUM;

}

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";

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, 6);

}

if (!is_valid_ether_addr(ndev->dev_addr)) {

mac_src = "chip";

for (i = 0; i < 6; i++)

ndev->dev_addr[i] = ne_def_eth_mac_addr[i];

}

if (!is_valid_ether_addr(ndev->dev_addr))

dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "

"set using ifconfign", ndev->name);

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 __devexit

dm9000_drv_remove(struct platform_device *pdev)

{

struct net_device *ndev = platform_get_drvdata(pdev);

platform_set_drvdata(pdev, NULL);

unregister_netdev(ndev);

dm9000_release_board(pdev, (board_info_t *) netdev_priv(ndev));

free_netdev(ndev);

dev_dbg(&pdev->dev, "released and freed devicen");

return 0;

}

static struct platform_driver dm9000_driver = {

.driver = {

.name = "dm9000",

.owner = THIS_MODULE,

},

.probe = dm9000_probe,

.remove = __devexit_p(dm9000_drv_remove),

};

static int __init

dm9000_init(void)

{

printk(KERN_INFO "%s Ethernet Driver, V%sn", CARDNAME, DRV_VERSION);

return platform_driver_register(&dm9000_driver);

}

static void __exit

dm9000_cleanup(void)

{

platform_driver_unregister(&dm9000_driver);

}

module_init(dm9000_init);

module_exit(dm9000_cleanup);

MODULE_AUTHOR("Modified by yan");

MODULE_DESCRIPTION("Davicom DM9000 network driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:dm9000");