1 、在arch/arm/plat-s3c24xx/common-smdk.c 增加D的平台设备。
vi arch/arm/plat-s3c24xx/common-smdk.c
(1) 添加头文件及 DM9000平台设备结构
下面部分内容添加到static struct platform_device __initdata *smdk_devs[]结构体前面
#include
#if defined(CONFIG_DM9000)||(defined(CONFIG_DM9000_MODULE))
/*DM9000*/
static struct resource s3c_dm9k_resource[]={
[0] = {
.start = 0x10000000,
.end = 0x10000003 ,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 0x11000000,
.end = 0x11000003,
.flags = IORESOURCE_MEM,
},
[2] = {
.start = IRQ_EINT0,
.end = IRQ_EINT0,
.flags = IORESOURCE_IRQ,
}
};
static struct dm9000_plat_data s3c_dm9k_platdata = {
.flags = DM9000_PLATF_16BITONLY,
};
static struct platform_device s3c_device_dm9k = {
.name = "dm9000",
.id = 0,
.num_resources = ARRAY_SIZE(s3c_dm9k_resource),
.resource = s3c_dm9k_resource,
.dev = {
.platform_data = &s3c_dm9k_platdata,
}
};
#endif
(2) 在 static struct platform_device __initdata *smdk_devs[] 中加入网卡设备
static struct platform_device __initdata *smdk_devs[] = {
&s3c_device_nand,
&smdk_led4,
&smdk_led5,
&smdk_led6,
&smdk_led7,
&s3c_device_dm9k,
};
2 、 修改dm9000.c及dm9000.h文件
(1) 将当前dm9000目录下dm9000.c替代内核源码下/driver/net/dm9000.c
(2) 将当前dm9000目录下dm9000.h替代内核源码下/driver/net/dm9000.h
3 、 配置内核将 DM9000 编译入内核
#make menuconfig
做如下修改：
Device Driver --->
Network device support --->
[ * ] Network device support
Ethernet(10 or 100Mbit)--->
< * >DM9000 support
4、再新编译
#make
至此，DM9000网卡可以驱动起来。
DM9000.c
/*
* dm9000.c: Version 1.2 03/18/2003
*
* A Davicom DM9000 ISA NIC 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.
*
* V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
* 06/22/2001 Support DM9801 progrmming
* E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
* E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
* R17 = (R17 & 0xfff0) | NF + 3
* E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
* R17 = (R17 & 0xfff0) | NF
*
* v1.00 modify by simon 2001.9.5
* change for kernel 2.4.x
*
* v1.1 11/09/2001 fix force mode bug
*
* v1.2 03/18/2003 Weilun Huang
:
* Fixed phy reset.
* Added tx/rx 32 bit mode.
* Cleaned up for kernel merge.
*
* 03/03/2004 Sascha Hauer
* Port to 2.6 kernel
*
* 24-Sep-2004 Ben Dooks
* Cleanup of code to remove ifdefs
* Allowed platform device data to influence access width
* Reformatting areas of code
*
* 17-Mar-2005 Sascha Hauer
* * removed 2.4 style module parameters
* * removed removed unused stat counter and fixed
* net_device_stats
* * introduced tx_timeout function
* * reworked locking
*
* 01-Jul-2005 Ben Dooks
* * fixed spinlock call without pointer
* * ensure spinlock is initialised
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "dm9000.h"
/* Board/System/Debug information/definition ---------------- */
#define DM9000_PHY 0x40 /* PHY address 0x01 */
#define CARDNAME "dm9000"
#define PFX CARDNAME ": "
#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
#define DM9000_DEBUG 0
#if DM9000_DEBUG > 2
#define PRINTK3(args...) printk(CARDNAME ": " args)
#else
#define PRINTK3(args...) do { } while(0)
#endif
#if DM9000_DEBUG > 1
#define PRINTK2(args...) printk(CARDNAME ": " args)
#else
#define PRINTK2(args...) do { } while(0)
#endif
#if DM9000_DEBUG > 0
#define PRINTK1(args...) printk(CARDNAME ": " args)
#define PRINTK(args...) printk(CARDNAME ": " args)
#else
#define PRINTK1(args...) do { } while(0)
#define PRINTK(args...) printk(KERN_DEBUG args)
#endif
/*
* Transmit timeout, default 5 seconds.
*/
static int watchdog = 5000;
module_param(watchdog, int, 0400);
MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
/* 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 dbug_cnt;
u8 io_mode; /* 0:word, 2:byte */
u8 chip_ver;
u8 phy_addr;
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 resource *addr_res; /* resources found */
struct resource *data_res;
struct resource *addr_req; /* resources requested */
struct resource *data_req;
struct resource *irq_res;
struct mutex addr_lock; /* phy and eeprom access lock */
struct delayed_work phy_poll;
struct net_device *ndev;
spinlock_t lock;
struct timer_list timer;
struct net_device_stats stats;
unsigned char srom[128];
struct mii_if_info mii;
u32 msg_enable;
} board_info_t;
/* function declaration ------------------------------------- */
static int dm9000_probe(struct platform_device *);
static int dm9000_open(struct net_device *);
static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
static int dm9000_stop(struct net_device *);
static void dm9000_timer(unsigned long);
static void dm9000_init_dm9000(struct net_device *);
static struct net_device_stats *dm9000_get_stats(struct net_device *);
static irqreturn_t dm9000_interrupt(int, void *);
static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
int value);
static u16 read_srom_word(board_info_t *, int);
static void dm9000_rx(struct net_device *);
static void dm9000_hash_table(struct net_device *);
//#define DM9000_PROGRAM_EEPROM
#ifdef DM9000_PROGRAM_EEPROM
static void program_eeprom(board_info_t * db);
#endif
/* DM9000 network board routine ---------------------------- */
static void
dm9000_reset(board_info_t * db)
{
PRINTK1("dm9000x: resetting\n");
/* RESET device */
writeb(DM9000_NCR, db->io_addr);
udelay(200);
writeb(NCR_RST, db->io_data);
udelay(200);
}
/*
* 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);
}
/* routines for sending block to chip */
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);
}
/* input block from chip to memory */
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);
}
/* 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);
}
/* 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 2:
db->dumpblk = dm9000_dumpblk_16bit;
db->outblk = dm9000_outblk_16bit;
db->inblk = dm9000_inblk_16bit;
break;
case 3:
printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
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;
}
}
/* 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 */
reg_save = readb(db->io_addr);
spin_lock_irqsave(&db->lock,flags);
netif_stop_queue(dev);
// dm9000_reset(db);
dm9000_init_dm9000(dev);
/* We can accept TX packets again */
// dev->trans_start = jiffies;
dev->trans_start = 0;
netif_wake_queue(dev);
/* Restore previous register address */
writeb(reg_save, db->io_addr);
spin_unlock_irqrestore(&db->lock,flags);
}
#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
/* dm9000_release_board
*
* release a board, and any mapped resources
*/
static void
dm9000_release_board(struct platform_device *pdev, struct board_info *db)
{
if (db->data_res == NULL) {
if (db->addr_res != NULL)
release_mem_region((unsigned long)db->io_addr, 4);
return;
}
/* unmap our resources */
iounmap(db->io_addr);
iounmap(db->io_data);
/* release the resources */
if (db->data_req != NULL) {
release_resource(db->data_req);
kfree(db->data_req);
}
if (db->addr_req != NULL) {
release_resource(db->addr_req);
kfree(db->addr_req);
}
}
#define res_size(_r) (((_r)->end - (_r)->start) + 1)
/*
* Search DM9000 board, allocate space and register it
*/
static int
dm9000_probe(struct platform_device *pdev)
{
struct dm9000_plat_data *pdata = pdev->dev.platform_data;
struct board_info *db; /* Point a board information structure */
struct net_device *ndev;
unsigned long base;
int ret = 0;
int iosize;
int i;
u32 id_val;
#if defined(CONFIG_ARCH_S3C2410)
unsigned int oldval_bwscon; /* 用来保存BWSCON寄存器的值 */
unsigned int oldval_bankcon2; /* 用来保存S3C2410_BANKCON2寄存器的值 */
#endif
/* Init network device */
ndev = alloc_etherdev(sizeof (struct board_info));
if (!ndev) {
printk("%s: could not allocate device.\n", CARDNAME);
return -ENOMEM;
}
//SET_MODULE_OWNER(ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
PRINTK2("dm9000_probe()");
#if defined(CONFIG_ARCH_S3C2410)
/* 设置Bank4: 总线宽度为16, 使能nWAIT。by */
oldval_bwscon = *((volatile unsigned int *)S3C2410_BWSCON);
// *((volatile unsigned int *)S3C2410_BWSCON) = (oldval_bwscon & ~(3<<16)) \
// | S3C2410_BWSCON_DW4_16 | S3C2410_BWSCON_WS4 | S3C2410_BWSCON_ST4;
*((volatile unsigned int *)S3C2410_BWSCON) = (oldval_bwscon & ~(3<<8)) | S3C2410_BWSCON_DW2_16 ;
/* 设置BANK3的时间参数, by */
oldval_bankcon2 = *((volatile unsigned int *)S3C2410_BANKCON2);
*((volatile unsigned int *)S3C2410_BANKCON2) = 0x1f7c;
#endif
/* setup board info structure */
db = netdev_priv(ndev);
memset(db, 0, sizeof (*db));
spin_lock_init(&db->lock);
if (pdev->num_resources < 2) {
ret = -ENODEV;
goto out;
} else if (pdev->num_resources == 2) {
base = pdev->resource[0].start;
if (!request_mem_region(base, 4, ndev->name)) {
ret = -EBUSY;
goto out;
}
} else {
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) {
printk(KERN_ERR PFX "insufficient resources\n");
ret = -ENOENT;
goto out;
}
i = res_size(db->addr_res);
db->addr_req = request_mem_region(db->addr_res->start, i,
pdev->name);
if (db->addr_req == NULL) {
printk(KERN_ERR PFX "cannot claim address reg area\n");
ret = -EIO;
goto out;
}
db->io_addr = ioremap(db->addr_res->start, i);
if (db->io_addr == NULL) {
printk(KERN_ERR "failed to ioremap address reg\n");
ret = -EINVAL;
goto out;
}
iosize = res_size(db->data_res);
db->data_req = request_mem_region(db->data_res->start, iosize,
pdev->name);
if (db->data_req == NULL) {
printk(KERN_ERR PFX "cannot claim data reg area\n");
ret = -EIO;
goto out;
}
db->io_data = ioremap(db->data_res->start, iosize);
if (db->io_data == NULL) {
printk(KERN_ERR "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;
}
dm9000_reset(db);
/* try two times, DM9000 sometimes gets the first read wrong */
for (i = 0; i < 2; 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;
printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
}
if (id_val != DM9000_ID) {
printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
goto release;
}
/* from this point we assume that we have found a DM9000 */
/* driver system function */
ether_setup(ndev);
ndev->open = &dm9000_open;
ndev->hard_start_xmit = &dm9000_start_xmit;
ndev->tx_timeout = &dm9000_timeout;
ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
ndev->stop = &dm9000_stop;
ndev->get_stats = &dm9000_get_stats;
ndev->set_multicast_list = &dm9000_hash_table;
#ifdef CONFIG_NET_POLL_CONTROLLER
ndev->poll_controller = &dm9000_poll_controller;
#endif
#ifdef DM9000_PROGRAM_EEPROM
program_eeprom(db);
#endif
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;
/* I/O mode */
db->chip_ver = ior(db, 0x2c);
db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
/* Read SROM content */
for (i = 0; i < 64; i++)
((u16 *) db->srom)[i] = read_srom_word(db, i);
/* Set Node Address */
for (i = 0; i < 6; i++)
ndev->dev_addr[i] = db->srom[i];
if (!is_valid_ether_addr(ndev->dev_addr)) {
/* try reading from mac */
for (i = 0; i < 6; i++)
ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
}
if (!is_valid_ether_addr(ndev->dev_addr)) {
printk("%s: Invalid ethernet MAC address. Please "
"set using ifconfig\n", ndev->name);
#if defined(CONFIG_ARCH_S3C2410)
printk("Now use the default MAC address: 08:90:90:90:90:90\n");
ndev->dev_addr[0] = 0x08;
ndev->dev_addr[1] = 0x90;
ndev->dev_addr[2] = 0x90;
ndev->dev_addr[3] = 0x90;
ndev->dev_addr[4] = 0x90;
ndev->dev_addr[5] = 0x90;
#endif
}
platform_set_drvdata(pdev, ndev);
ret = register_netdev(ndev);
if (ret == 0) {
printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
ndev->name, db->io_addr, db->io_data, ndev->irq);
for (i = 0; i < 5; i++)
printk("%02x:", ndev->dev_addr[i]);
printk("%02x\n", ndev->dev_addr[5]);
}
return 0;
release:
out:
printk("%s: not found (%d).\n", CARDNAME, ret);
#if defined(CONFIG_ARCH_S3C2410)
/* 恢复寄存器原来的值 */
*((volatile unsigned int *)S3C2410_BWSCON) = oldval_bwscon;
*((volatile unsigned int *)S3C2410_BANKCON2) = oldval_bankcon2;
#endif
dm9000_release_board(pdev, db);
free_netdev(ndev);
return ret;
}
/*
* 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);
PRINTK2("entering dm9000_open\n");
#if defined(CONFIG_ARCH_S3C2410)
if (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED|IRQF_TRIGGER_RISING, dev->name, dev))
#else
if (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED, dev->name, dev))
#endif
return -EAGAIN;
/* Initialize DM9000 board */
// dm9000_reset(db);
dm9000_init_dm9000(dev);
/* Init driver variable */
db->dbug_cnt = 0;
/* set and active a timer process */
init_timer(&db->timer);
db->timer.expires = DM9000_TIMER_WUT;
db->timer.data = (unsigned long) dev;
db->timer.function = &dm9000_timer;
add_timer(&db->timer);
mii_check_media(&db->mii, netif_msg_link(db), 1);
netif_start_queue(dev);
return 0;
}
/*
* Initilize dm9000 board
*/
static void
dm9000_init_dm9000(struct net_device *dev)
{
board_info_t *db = netdev_priv(dev);
int i;
PRINTK1("entering %s\n",__FUNCTION__);
if(!(ior(db, DM9000_NSR) & 0x40))
{
printk(" \n device is not link \n");
/* GPIO0 on pre-activate PHY */
iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
udelay(100);
dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
// dm9000_phy_write(dev, 0, 0x14, 0x0030);
if(db->chip_ver > 0x19) dm9000_phy_write(dev, 0, 0x1b, 0xe100);
iow(db, DM9000_GPR, 0); /* Enable PHY */
for(i = 1000; i && (ior(db, 0x28) != 0x46); i--)
udelay(100);
}
else
{
printk(" \n link ok \n");
printk(" phy reg 0x00 %04x\n", dm9000_phy_read(dev, 0, 0x00));
printk(" phy reg 0x01 %04x\n", dm9000_phy_read(dev, 0, 0x01));
printk(" phy reg 0x04 %04x\n", dm9000_phy_read(dev, 0, 0x04));
printk(" phy reg 0x05 %04x\n", dm9000_phy_read(dev, 0, 0x05));
}
dm9000_reset(db);
/* Program operating register */
iow(db, DM9000_NCR, 0);
iow(db, DM9000_IMR, IMR_PAR);
iow(db, DM9000_TCR, 0); /* TX Polling clear */
iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
iow(db, DM9000_FCR, 0x28); /* Flow Control */
iow(db, DM9000_SMCR, 0x08); /* 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 */
iow(db, 0x2d, 0x80);
iow(db, 0x39, 0x00);
if(db->chip_ver > 0x19)
iow(db, 0x38, 0x61);
else
iow(db, 0x38, 0x21);
/* Set address filter table */
dm9000_hash_table(dev);
/* Activate DM9000 */
iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
/* Enable TX/RX interrupt mask */
iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
/* Init Driver variable */
db->tx_pkt_cnt = 0;
db->queue_pkt_len = 0;
dev->trans_start = 0;
}
/*
* 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)
{
board_info_t *db = netdev_priv(dev);
PRINTK3("dm9000_start_xmit\n");
if (db->tx_pkt_cnt > 0)
return 1;
netif_stop_queue(dev);
db->tx_pkt_cnt++;
db->stats.tx_bytes += skb->len;
db->stats.tx_packets++;
/* Disable all interrupts */
iow(db, DM9000_IMR, IMR_PAR);
/* Set TX length to DM9000 */
iow(db, DM9000_TXPLL, skb->len & 0xff);
iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
/* Move data to DM9000 TX RAM */
writeb(DM9000_MWCMD, db->io_addr);
(db->outblk)(db->io_data, skb->data, skb->len);
/* Issue TX polling command */
iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
dev->trans_start = jiffies; /* save the time stamp */
/* free this SKB */
dev_kfree_skb(skb);
/* Re-enable interrupt */
iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
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 */
udelay(100);
iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
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);
PRINTK1("entering %s\n",__FUNCTION__);
/* deleted timer */
del_timer(&db->timer);
netif_stop_queue(ndev);
netif_carrier_off(ndev);
/* free interrupt */
free_irq(ndev->irq, ndev);
dm9000_shutdown(ndev);
return 0;
}
/*
* 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_TCR); /* Got TX status */
if(tx_status & TCR_TXREQ)
{
db->stats.tx_fifo_errors++;
}
else
{
db->tx_pkt_cnt = 0;
dev->trans_start = 0;
netif_wake_queue(dev);
}
}
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;
u8 reg_save;
PRINTK3("entering %s\n",__FUNCTION__);
if (!dev) {
PRINTK1("dm9000_interrupt() without DEVICE arg\n");
return IRQ_HANDLED;
}
/* A real interrupt coming */
spin_lock(&db->lock);
/* Save previous register address */
reg_save = readb(db->io_addr);
/* Disable all interrupts */
iow(db, DM9000_IMR, IMR_PAR);
/* Got DM9000 interrupt status */
int_status = ior(db, DM9000_ISR); /* Got ISR */
iow(db, DM9000_ISR, int_status); /* Clear ISR status */
/* Received the coming packet */
if (int_status & ISR_PRS)
dm9000_rx(dev);
int_status |= ior(db, DM9000_ISR); /* Got ISR */
/* Trnasmit Interrupt check */
if (int_status & ISR_PTS)
{
dm9000_tx_done(dev, db);
iow(db, DM9000_ISR, ISR_PTS);
}
/* Re-enable interrupt mask */
iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
/* Restore previous register address */
writeb(reg_save, db->io_addr);
spin_unlock(&db->lock);
return IRQ_HANDLED;
}
/*
* Get statistics from driver.
*/
static struct net_device_stats *
dm9000_get_stats(struct net_device *dev)
{
board_info_t *db = netdev_priv(dev);
return &db->stats;
}
/*
* A periodic timer routine
* Dynamic media sense, allocated Rx buffer...
*/
static void
dm9000_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *) data;
board_info_t *db = netdev_priv(dev);
PRINTK3("dm9000_timer()\n");
mii_check_media(&db->mii, netif_msg_link(db), 0);
/*
printk("\n reg 0x00 ==> %02x", ior(db, 0x00));
printk("\n reg 0x01 ==> %02x", ior(db, 0x01));
printk("\n reg 0x05 ==> %02x", ior(db, 0x05));
printk("\n reg 0xfe ==> %02x", ior(db, 0xfe));
printk("\n reg 0xff ==> %02x", ior(db, 0xff));
*/
/* Set timer again */
db->timer.expires = DM9000_TIMER_WUT;
add_timer(&db->timer);
}
struct dm9000_rxhdr {
u16 RxStatus;
u16 RxLen;
} __attribute__((__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 {
/* Get most updated data */
ior(db, DM9000_MRCMDX); /* Dummy read */
ior(db, DM9000_ISR); /* Dummy read */
rxbyte = ior(db, DM9000_MRCMDX);
/* Status check: this byte must be 0 or 1 */
if (rxbyte > DM9000_PKT_RDY) {
printk("status check failed: %d\n", rxbyte);
iow(db, DM9000_RCR, 0x00); /* Stop Device */
iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
/* Initialize DM9000 board */
// dm9000_reset(db);
dm9000_init_dm9000(dev);
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 = rxhdr.RxLen;
/* Packet Status check */
if (RxLen < 0x40) {
GoodPacket = false;
PRINTK1("Bad Packet received (runt)\n");
}
if (RxLen > DM9000_PKT_MAX) {
PRINTK1("RST: RX Len:%x\n", RxLen);
}
if (rxhdr.RxStatus & 0xbf00) {
GoodPacket = false;
if (rxhdr.RxStatus & 0x100) {
PRINTK1("fifo error\n");
db->stats.rx_fifo_errors++;
}
if (rxhdr.RxStatus & 0x200) {
PRINTK1("crc error\n");
db->stats.rx_crc_errors++;
}
if (rxhdr.RxStatus & 0x8000) {
PRINTK1("length error\n");
db->stats.rx_length_errors++;
}
}
/* Move data from DM9000 */
if (GoodPacket
&& ((skb = dev_alloc_skb(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);
db->stats.rx_bytes += RxLen;
/* Pass to upper layer */
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
db->stats.rx_packets++;
} else {
/* need to dump the packet's data */
(db->dumpblk)(db->io_data, RxLen);
}
} while (rxbyte == DM9000_PKT_RDY);
}
/*
* Read a word data from SROM
*/
static u16
read_srom_word(board_info_t * db, int offset)
{
iow(db, DM9000_EPAR, offset);
iow(db, DM9000_EPCR, EPCR_ERPRR);
while(ior(db, DM9000_EPCR) & 0x01)
mdelay(8); /* according to the datasheet 200us should be enough,
but it doesn't work */
iow(db, DM9000_EPCR, 0x0);
return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
}
#ifdef DM9000_PROGRAM_EEPROM
/*
* Write a word data to SROM
*/
static void
write_srom_word(board_info_t * db, int offset, u16 val)
{
iow(db, DM9000_EPAR, offset);
iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
iow(db, DM9000_EPDRL, (val & 0xff));
iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
while(ior(db, DM9000_EPCR) & 0x01)
mdelay(8); /* same shit */
iow(db, DM9000_EPCR, 0);
}
/*
* Only for development:
* Here we write static data to the eeprom in case
* we don't have valid content on a new board
*/
static void
program_eeprom(board_info_t * db)
{
u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
0x0000, /* Autoload: accept nothing */
0x0a46, 0x9000, /* Vendor / Product ID */
0x0000, /* pin control */
0x0000,
}; /* Wake-up mode control */
int i;
for (i = 0; i < 8; i++)
write_srom_word(db, i, eeprom[i]);
}
#endif
/*
* Calculate the CRC valude of the Rx packet
* flag = 1 : return the reverse CRC (for the received packet CRC)
* 0 : return the normal CRC (for Hash Table index)
*/
static unsigned long
cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
{
u32 crc = ether_crc_le(Len, Data);
if (flag)
return ~crc;
return crc;
}
/*
* Set DM9000 multicast address
*/
static void
dm9000_hash_table(struct net_device *dev)
{
board_info_t *db = netdev_priv(dev);
struct dev_mc_list *mcptr = dev->mc_list;
int mc_cnt = dev->mc_count;
u32 hash_val;
u16 i, oft, hash_table[4];
unsigned long flags;
PRINTK2("dm9000_hash_table()\n");
spin_lock_irqsave(&db->lock,flags);
for (i = 0, oft = 0x10; i < 6; i++, oft++)
iow(db, oft, dev->dev_addr[i]);
/* Clear Hash Table */
for (i = 0; i < 4; i++)
hash_table[i] = 0x0;
/* broadcast address */
hash_table[3] = 0x8000;
/* the multicast address in Hash Table : 64 bits */
for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
}
/* Write the hash table to MAC MD table */
for (i = 0, oft = 0x16; i < 4; i++) {
iow(db, oft++, hash_table[i] & 0xff);
iow(db, oft++, (hash_table[i] >> 8) & 0xff);
}
spin_unlock_irqrestore(&db->lock,flags);
}
/*
* 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;
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);
iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
while(ior(db, DM9000_EPCR) & 0x01)
udelay(100); /* Wait read complete */
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);
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;
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 & 0xff));
iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
while(ior(db, DM9000_EPCR) & 0x01)
udelay(500); /* Wait write complete */
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);
}
static int
dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
{
struct net_device *ndev = platform_get_drvdata(dev);
if (ndev) {
if (netif_running(ndev)) {
netif_device_detach(ndev);
dm9000_shutdown(ndev);
}
}
return 0;
}
static int
dm9000_drv_resume(struct platform_device *dev)
{
struct net_device *ndev = platform_get_drvdata(dev);
board_info_t *db = netdev_priv(ndev);
if (ndev) {
if (netif_running(ndev)) {
// dm9000_reset(db);
dm9000_init_dm9000(ndev);
netif_device_attach(ndev);
}
}
return 0;
}
static int
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 *) ndev->ml_priv);
free_netdev(ndev); /* free device structure */
PRINTK1("clean_module() exit\n");
return 0;
}
static struct platform_driver dm9000_driver = {
.driver = {
.name = "dm9000",
.owner = THIS_MODULE,
},
.probe = dm9000_probe,
.remove = dm9000_drv_remove,
.suspend = dm9000_drv_suspend,
.resume = dm9000_drv_resume,
};
static int __init
dm9000_init(void)
{
printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
return platform_driver_register(&dm9000_driver); /* search board and register */
}
static void __exit
dm9000_cleanup(void)
{
platform_driver_unregister(&dm9000_driver);
}
module_init(dm9000_init);
module_exit(dm9000_cleanup);
MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
MODULE_DESCRIPTION("Davicom DM9000 network driver");
MODULE_LICENSE("GPL");
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