前面一节简单分析了Linux内核网卡驱动程序的框架，并编写了一个虚拟网卡驱动程序。这一节我们开始学习网卡芯片DM9000C，尝试将官方提供的DM900C网卡驱动程序移植到jz2440开发板使用的内核里。
内核版本：Linux-3.4.2
官方网卡驱动版本：2.09
1、DM900C连接方式
DM900C和S3C2440之间的连接是以内存访问接口的方式进行连接的，连接方式如上图所示：
- SD0~SD15：16位数据线，连接到S3C2440的16位数据线上
- CMD：命令线，连接到S3C2440的第3条地址线上
- INT：中断引脚，接S3C2440的GPF7引脚
- IOR#：读使能信号，接S3C2440的nOE引脚
- IOW#：写使能信号，接S3C2440的nWE引脚
- CS#：片选信号，接S3C2440的Bank4的片选引脚
DM9000C连接到S3C2440的bank4位置，bank4的访问区间位于0x20000000~0x28000000，当访问地址位于bank4所在的地址区间内，nGCS4片选信号被自动拉低，DM9000C芯片访问使能。至于DM9000C的具体访问地址在哪里呢？这个还需要再结合CMD命令线连接的地址线来分析。
S3C2440的地址线LADDR2连接到DM9000C的CMD引脚，我们知道CMD命令线信号状态决定对DM9000C的访问类型，当CMD为高表示SD传输的是数据，CMD为低表示传输的是地址。因此，当主控准备向DM900C写数据时，只需将要写的数据信息写入到0x20000004地址中；当主控准备向DM900C写入访问地址时，只需将要访问的地址信息写入到0x20000000地址。
例如：DM9000C芯片内的28H~29H地址为厂商ID寄存器，如果我们想获取厂商ID信息，只需先向0x20000000地址中写入寄存器0x28，然后读取0x20000004地址内容，就能获取厂商ID信息。
当DM9000C收到外部数据时，会将数据存放到内部数据寄存器中，然后通过INT引脚产生一个上升沿中断，通知S3C2440读取数据信息。同样的，当DM9000C将主控传过来的数据信息发送出去后，也会通过INT引脚产生一个中断，通知主控数据已经传入完成。
2、官方驱动程序移植
修改dm900c芯片官方提供的驱动程序，使其适应自己开发板硬件，这里移植的官方驱动程序的版本是2.09
2.1 删除入口函数前的条件编译
入口函数前有个ifdef MODULE条件编译，如果未定义MODULE宏，不编译这部分。我们这里需要使用入口函数，所以删除这个ifdef宏。当然，也可以在前面使用define定义MODULE这个宏。
2.2 修改入口、出口函数名，并修饰它们
未避免和内核中的其它函数重名，修改入口、出口函数名
init_module-->dm9000c_init
cleanup_module-->dm9000c_exit
最后使用module_init和module_exit修饰入口和出口函数
2.3 修改驱动程序的硬件差异部分
驱动程序的硬件差异部分主要可以概括为三部分：
- DM9000C网卡的基地址
- 使用的中断资源
- 根据DM9000C的芯片特性，设置S3C2440内存控制器访问时序
先来找出dm9000c的基地址在驱动程序中是在哪里描述的，从入口函数中开始进行查找。
dm9000c_init
|----->dmfe_probe
入口函数中最终调用了dmfe_probe函数，dmfe_probe函数内容如下：
struct net_device * __init dmfe_probe(void) { struct net_device *dev; ... dev= alloc_etherdev(sizeof(struct board_info)); ... err = dmfe_probe1(dev); ... err = register_netdev(dev); ... }
dmfe_probe函数中分配了net_device结构体，调用dmfe_probe函数后，最终注册了分配的net_device结构体。根据上一节的分析，可以知道net_device结构体就是为描述一个网卡设备抽象的，net_device结构体包含了网卡底层收发的函数等等，我们可以猜测dmfe_probe1函数中就是来初始化dm9000c硬件，根据硬件特性来设置net_device结构体的成员供上层使用。
（注：alloc_etherdev(sizeof(struct board_info))函数除了分配了net_device结构体外，还额外分配了一块描述board_info信息的内存，这块内存在后面会使用到）
继续来看dmfe_probe1函数
在前面DM9000C连接方式中，我们已经说过，当主控想对DM900C读写数据时，需要将想要读写访问的地址信息先写入到0x20000000地址，然后再根据是读还是去写的需求去操作0x20000004地址。如是读操作，只需读取该地址内容，如是写操作只需将写的内容写到该地址中。
在上图，主控想获取DM9000的DM9KS_VID_L寄存器内容，先调用outb函数向iobase出写入寄存器地址，然后从iobase+4位置读取寄存器里的值。可以看出这个iobase变量就是我们DM9000C的基地址。
找到了保存dm9000c的基地址变量，我们需要根据硬件特性设置iobase基地址，iobase的物理地址是0x20000000。iobase基地址的设置需要在调用dmfe_probe1函数之前，这里我们在入口函数处设置，并在出口函数中取消映射
继续来看dmfe_probe1函数
① Linux-3.4.2内核中的net_device结构体中已经没有了priv成员，所以额外分配的board_info结构体内存不能使用priv访问。新内核中提供了netdev_priv函数去获取这块内存的起始地址。
（注：官方提供dm9000驱动程序中有多处使用dev->priv获取分配board_info的初始地址，这些部分都需要统一替换成netdev_priv(dev)）
② 注释掉这部分内容，这句语句判断读取的dm9000芯片的版本信息不在这些给定版本内直接返回。我们的dm9000芯片版本信息可能和这些不同，但操作方式是通用的，所以取消这部分判断。
继续来看dmfe_probe1函数
① net_device的irq成员代表注册的中断号，所以irq描述中断号。这里我们这入口函数处设置irq，dm9000c的中断引脚连接s3c2440的外部中断7。
当使用了register_netdev()注册了网卡驱动net_device后，在内核中使用ifconfig就会进入net_device->open成员函数申请中断，激活队列等。
所以我们要修改open成员函数的申请中断函数，将触发中断改为“IRQF_TRIGGER_RISING”，上升沿触发
② Linux-3.4.2内核中对网卡进行操作的函数指针抽象到net_devices_ops结构体中，描述网卡设备的net_device结构体中的使用netdev_ops指针指向这部分内容，所以需要将老的接口修改成新内核的接口。
官方提供的2.09驱动程序中dm9000_hash_table中使用的net_device的mc_list、mc_count成员，在新内核的net_device结构体中都不存在了，所以还需要修改dm9000_hash_table函数。
将官方提供的dm9000_hash_table函数替换成以下内容，替换内容参考Linux-3.4.2内核自带的DM9000驱动程序中实现的
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 %s ", __func__); for (i = 0, oft = DM9000_PAR; 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; 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); }
Linux-3.4.2内核的ethtool_ops结构体中已经删除了.get_rx_csum、set_rx_csum、.get_tx_csum、.set_tx_csim等函数指针，这里我们需要注释掉defe_ethtool_ops结构体中的.get_rx_csum、set_rx_csum、.get_tx_csum、.set_tx_csim等函数指针的设置。
根据dm9000c芯片的访问时序特性，设置s3c2440芯片内存控制器，优化访问操作。
1）设置BWSCON寄存器
- 设置ST4=0，不使用UB/LB(UB/LB：表示高字节与低字节数据是否分开传输)
- 设置WS4=0，其中WAIT引脚为PE4,而我们DM9000C没有引脚接入PE4，所以禁止
- 设置DW4=0x01，我们的DM9000C的数据线为16位
2）设置BANLCON4寄存器
需参考DM9000c芯片数据手册（HCLK=100MHZ，1个时钟等于10ns）
- 设置Tacs=0，CS和CMD可以同时结束。表示bank4地址稳定多久后，CS片选才启动
- 设置Tcos=0，CS片选后，多久才能使能读写
- 设置Tacc=7，11个时钟 ，access cycle ，读写使能后,多久才能访问数据
- 设置Tcoh=1，1个时钟，因为当DM9000的写信号取消后，数据线上的数据还需要至少3ns才消失(nOE读写取消后，片选需要维持多长时间)
- 设置Tcah=0，CS和CMD可以同时结束。表示 CS片选取消后，地址需要维持多长时间
代码如下图所示，在入口函数中设置
3、编译测试
1）编译之前，首先添加该驱动需要的内核头文件
#include <linux/interrupt.h> #include "dm9000.h"
2）将修改的驱动程序放入到内核源码树的drivers/net/ethernet/davicom文件夹中
3）修改drivers/net/ethernet/davicom文件夹下的Makefile
4）切换到内核源码的顶层目录，指向make uImage
5）拷贝编译好的uImage文件到网络文件系统
6）在uboot中使用nfs命令将新的内核加载到内存中
nfs 0x30000000 192.168.1.100:/work/fs_digital_photo_self/uImage_net
7） bootm启动内核，查看是否能正常挂载网络文件系统
完整驱动程序
/* dm9ks.c: Version 2.08 2007/02/12 A Davicom DM9000/DM9010 ISA NIC fast Ethernet driver for Linux. 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 1997-2007 DAVICOM Semiconductor,Inc. All Rights Reserved. V2.00 Spenser - 01/10/2005 - Modification for PXA270 MAINSTONE. - Modified dmfe_tx_done(). - Add dmfe_timeout(). V2.01 10/07/2005 -Modified dmfe_timer() -Dected network speed 10/100M V2.02 10/12/2005 -Use link change to chage db->Speed -dmfe_open() wait for Link OK V2.03 11/22/2005 -Power-off and Power-on PHY in dmfe_init_dm9000() -support IOL V2.04 12/13/2005 -delay 1.6s between power-on and power-off in dmfe_init_dm9000() -set LED mode 1 in dmfe_init_dm9000() -add data bus driving capability in dmfe_init_dm9000() (optional) 10/3/2006 -Add DM8606 read/write function by MDC and MDIO V2.06 01/03/2007 -CONT_RX_PKT_CNT=0xFFFF -modify dmfe_tx_done function -check RX FIFO pointer -if using physical address, re-define I/O function -add db->cont_rx_pkt_cnt=0 at the front of dmfe_packet_receive() V2.08 02/12/2007 -module parameter macro 2.4 MODULE_PARM 2.6 module_param -remove #include <linux/config> -fix dmfe_interrupt for kernel 2.6.20 V2.09 05/24/2007 -support ethtool and mii-tool 05/30/2007 -fix the driver bug when ifconfig eth0 (-)promisc and (-)allmulti. 06/05/2007 -fix dm9000b issue(ex. 10M TX idle=65mA, 10M harmonic) -add flow control function (option) 10/01/2007 -Add #include <asm/uaccess.h> -Modyfy dmfe_do_ioctl for kernel 2.6.7 11/23/2007 -Add TDBUG to check TX FIFO pointer shift - Remove check_rx_ready() - Add #define CHECKSUM to modify CHECKSUM function 12/20/2007 -Modify TX timeout routine(+)check TCR&0x01 */ //#define CHECKSUM //#define TDBUG /* check TX FIFO pointer */ //#define RDBUG /* check RX FIFO pointer */ //#define DM8606 #define DRV_NAME "dm9KS" #define DRV_VERSION "2.09" #define DRV_RELDATE "2007-11-22" #ifdef MODVERSIONS #include <linux/modversions.h> #endif //#include <linux/config.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/ioport.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/version.h> #include <asm/dma.h> #include <linux/spinlock.h> #include <linux/crc32.h> #include <linux/mii.h> #include <linux/ethtool.h> #include <asm/uaccess.h> #include <linux/interrupt.h> #ifdef CONFIG_ARCH_MAINSTONE #include <asm/io.h> #include <asm/hardware.h> #include <asm/irq.h> #endif #include "dm9000.h" /* Board/System/Debug information/definition ---------------- */ #define DM9KS_ID 0x90000A46 #define DM9010_ID 0x90100A46 /*-------register name-----------------------*/ #define DM9KS_NCR 0x00 /* Network control Reg.*/ #define DM9KS_NSR 0x01 /* Network Status Reg.*/ #define DM9KS_TCR 0x02 /* TX control Reg.*/ #define DM9KS_RXCR 0x05 /* RX control Reg.*/ #define DM9KS_BPTR 0x08 #define DM9KS_FCTR 0x09 #define DM9KS_FCR 0x0a #define DM9KS_EPCR 0x0b #define DM9KS_EPAR 0x0c #define DM9KS_EPDRL 0x0d #define DM9KS_EPDRH 0x0e #define DM9KS_GPR 0x1f /* General purpose register */ #define DM9KS_CHIPR 0x2c #define DM9KS_TCR2 0x2d #define DM9KS_SMCR 0x2f /* Special Mode Control Reg.*/ #define DM9KS_ETXCSR 0x30 /* Early Transmit control/status Reg.*/ #define DM9KS_TCCR 0x31 /* Checksum cntrol Reg. */ #define DM9KS_RCSR 0x32 /* Receive Checksum status Reg.*/ #define DM9KS_BUSCR 0x38 #define DM9KS_MRCMDX 0xf0 #define DM9KS_MRCMD 0xf2 #define DM9KS_MDRAL 0xf4 #define DM9KS_MDRAH 0xf5 #define DM9KS_MWCMD 0xf8 #define DM9KS_MDWAL 0xfa #define DM9KS_MDWAH 0xfb #define DM9KS_TXPLL 0xfc #define DM9KS_TXPLH 0xfd #define DM9KS_ISR 0xfe #define DM9KS_IMR 0xff /*---------------------------------------------*/ #define DM9KS_REG05 0x30 /* SKIP_CRC/SKIP_LONG */ #define DM9KS_REGFF 0xA3 /* IMR */ #define DM9KS_DISINTR 0x80 #define DM9KS_PHY 0x40 /* PHY address 0x01 */ #define DM9KS_PKT_RDY 0x01 /* Packet ready to receive */ /* Added for PXA of MAINSTONE */ #ifdef CONFIG_ARCH_MAINSTONE #include <asm/arch/mainstone.h> #define DM9KS_MIN_IO (MST_ETH_PHYS + 0x300) #define DM9KS_MAX_IO (MST_ETH_PHYS + 0x370) #define DM9K_IRQ MAINSTONE_IRQ(3) #else #define DM9KS_MIN_IO 0x300 #define DM9KS_MAX_IO 0x370 #define DM9KS_IRQ 3 #endif #define DM9KS_VID_L 0x28 #define DM9KS_VID_H 0x29 #define DM9KS_PID_L 0x2A #define DM9KS_PID_H 0x2B #define DM9KS_RX_INTR 0x01 #define DM9KS_TX_INTR 0x02 #define DM9KS_LINK_INTR 0x20 #define DM9KS_DWORD_MODE 1 #define DM9KS_BYTE_MODE 2 #define DM9KS_WORD_MODE 0 #define TRUE 1 #define FALSE 0 /* Number of continuous Rx packets */ #define CONT_RX_PKT_CNT 0xFFFF #define DMFE_TIMER_WUT jiffies+(HZ*5) /* timer wakeup time : 5 second */ #ifdef DM9KS_DEBUG #define DMFE_DBUG(dbug_now, msg, vaule) if (dmfe_debug||dbug_now) printk(KERN_ERR "dmfe: %s %x ", msg, vaule) #else #define DMFE_DBUG(dbug_now, msg, vaule) if (dbug_now) printk(KERN_ERR "dmfe: %s %x ", msg, vaule) #endif #ifndef CONFIG_ARCH_MAINSTONE #pragma pack(push, 1) #endif typedef struct _RX_DESC { u8 rxbyte; u8 status; u16 length; }RX_DESC; typedef union{ u8 buf[4]; RX_DESC desc; } rx_t; #ifndef CONFIG_ARCH_MAINSTONE #pragma pack(pop) #endif enum DM9KS_PHY_mode { DM9KS_10MHD = 0, DM9KS_100MHD = 1, DM9KS_10MFD = 4, DM9KS_100MFD = 5, DM9KS_AUTO = 8, }; /* Structure/enum declaration ------------------------------- */ typedef struct board_info { u32 io_addr;/* Register I/O base address */ u32 io_data;/* Data I/O address */ u8 op_mode;/* PHY operation mode */ u8 io_mode;/* 0:word, 2:byte */ u8 Speed; /* current speed */ u8 chip_revision; int rx_csum;/* 0:disable, 1:enable */ u32 reset_counter;/* counter: RESET */ u32 reset_tx_timeout;/* RESET caused by TX Timeout */ int tx_pkt_cnt; int cont_rx_pkt_cnt;/* current number of continuos rx packets */ struct net_device_stats stats; struct timer_list timer; unsigned char srom[128]; spinlock_t lock; struct mii_if_info mii; } board_info_t; /* Global variable declaration ----------------------------- */ /*static int dmfe_debug = 0;*/ static struct net_device * dmfe_dev = NULL; static struct ethtool_ops dmfe_ethtool_ops; /* For module input parameter */ static int mode = DM9KS_AUTO; static int media_mode = DM9KS_AUTO; static int irq = DM9KS_IRQ; static int iobase = DM9KS_MIN_IO; #if 0 // use physical address; Not virtual address #ifdef outb #undef outb #endif #ifdef outw #undef outw #endif #ifdef outl #undef outl #endif #ifdef inb #undef inb #endif #ifdef inw #undef inw #endif #ifdef inl #undef inl #endif void outb(u8 reg, u32 ioaddr) { (*(volatile u8 *)(ioaddr)) = reg; } void outw(u16 reg, u32 ioaddr) { (*(volatile u16 *)(ioaddr)) = reg; } void outl(u32 reg, u32 ioaddr) { (*(volatile u32 *)(ioaddr)) = reg; } u8 inb(u32 ioaddr) { return (*(volatile u8 *)(ioaddr)); } u16 inw(u32 ioaddr) { return (*(volatile u16 *)(ioaddr)); } u32 inl(u32 ioaddr) { return (*(volatile u32 *)(ioaddr)); } #endif /* function declaration ------------------------------------- */ int dmfe_probe1(struct net_device *); static int dmfe_open(struct net_device *); static int dmfe_start_xmit(struct sk_buff *, struct net_device *); static void dmfe_tx_done(unsigned long); static void dmfe_packet_receive(struct net_device *); static int dmfe_stop(struct net_device *); static struct net_device_stats * dmfe_get_stats(struct net_device *); static int dmfe_do_ioctl(struct net_device *, struct ifreq *, int); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) static void dmfe_interrupt(int , void *, struct pt_regs *); #else #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) static irqreturn_t dmfe_interrupt(int , void *, struct pt_regs *); #else static irqreturn_t dmfe_interrupt(int , void *);/* for kernel 2.6.20 */ #endif #endif static void dmfe_timer(unsigned long); static void dmfe_init_dm9000(struct net_device *); static unsigned long cal_CRC(unsigned char *, unsigned int, u8); u8 ior(board_info_t *, int); void iow(board_info_t *, int, u8); static u16 phy_read(board_info_t *, int); static void phy_write(board_info_t *, int, u16); static u16 read_srom_word(board_info_t *, int); static void dm9000_hash_table(struct net_device *); static void dmfe_timeout(struct net_device *); static void dmfe_reset(struct net_device *); static int mdio_read(struct net_device *, int, int); static void mdio_write(struct net_device *, int, int, int); static void dmfe_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); static int dmfe_get_settings(struct net_device *, struct ethtool_cmd *); static int dmfe_set_settings(struct net_device *, struct ethtool_cmd *); static u32 dmfe_get_link(struct net_device *); static int dmfe_nway_reset(struct net_device *); static uint32_t dmfe_get_rx_csum(struct net_device *); static uint32_t dmfe_get_tx_csum(struct net_device *); static int dmfe_set_rx_csum(struct net_device *, uint32_t ); static int dmfe_set_tx_csum(struct net_device *, uint32_t ); #ifdef DM8606 #include "dm8606.h" #endif //DECLARE_TASKLET(dmfe_tx_tasklet,dmfe_tx_done,0); /* DM9000 network baord routine ---------------------------- */ /* Search DM9000 board, allocate space and register it */ struct net_device * __init dmfe_probe(void) { struct net_device *dev; int err; DMFE_DBUG(0, "dmfe_probe()",0); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) dev = init_etherdev(NULL, sizeof(struct board_info)); //ether_setup(dev); #else dev= alloc_etherdev(sizeof(struct board_info)); #endif if(!dev) return ERR_PTR(-ENOMEM); // SET_MODULE_OWNER(dev); err = dmfe_probe1(dev); if (err) goto out; #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0) err = register_netdev(dev); if (err) goto out1; #endif return dev; out1: release_region(dev->base_addr,2); out: #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) kfree(dev); #else free_netdev(dev); #endif return ERR_PTR(err); } static const struct net_device_ops dm9000c_netdev_ops = { .ndo_open = dmfe_open, .ndo_stop = dmfe_stop, .ndo_start_xmit = dmfe_start_xmit, .ndo_tx_timeout = dmfe_timeout, .ndo_set_rx_mode = dm9000_hash_table, .ndo_do_ioctl = dmfe_do_ioctl, .ndo_change_mtu = eth_change_mtu, .ndo_get_stats = dmfe_get_stats, //.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 }; int __init dmfe_probe1(struct net_device *dev) { struct board_info *db; /* Point a board information structure */ u32 id_val; u16 i, dm9000_found = FALSE; u8 MAC_addr[6]={0x00,0x60,0x6E,0x33,0x44,0x55}; u8 HasEEPROM=0,chip_info; DMFE_DBUG(0, "dmfe_probe1()",0); /* Search All DM9000 serial NIC */ do { outb(DM9KS_VID_L, iobase); id_val = inb(iobase + 4); outb(DM9KS_VID_H, iobase); id_val |= inb(iobase + 4) << 8; outb(DM9KS_PID_L, iobase); id_val |= inb(iobase + 4) << 16; outb(DM9KS_PID_H, iobase); id_val |= inb(iobase + 4) << 24; if (id_val == DM9KS_ID || id_val == DM9010_ID) { /* Request IO from system */ if(!request_region(iobase, 2, dev->name)) return -ENODEV; printk(KERN_ERR"<DM9KS> I/O: %x, VID: %x ",iobase, id_val); dm9000_found = TRUE; /* Allocated board information structure */ db = netdev_priv(dev); memset(db, 0, sizeof(struct board_info)); dmfe_dev = dev; db->io_addr = iobase; db->io_data = iobase + 4; db->chip_revision = ior(db, DM9KS_CHIPR); chip_info = ior(db,0x43); //if((db->chip_revision!=0x1A) || ((chip_info&(1<<5))!=0) || ((chip_info&(1<<2))!=1)) return -ENODEV; /* driver system function */ dev->netdev_ops = &dm9000c_netdev_ops; dev->base_addr = iobase; dev->irq = irq; //dev->open = &dmfe_open; //dev->hard_start_xmit = &dmfe_start_xmit; dev->watchdog_timeo = 5*HZ; //dev->tx_timeout = dmfe_timeout; //dev->stop = &dmfe_stop; //dev->get_stats = &dmfe_get_stats; //dev->set_multicast_list = &dm9000_hash_table; //dev->do_ioctl = &dmfe_do_ioctl; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,28) dev->ethtool_ops = &dmfe_ethtool_ops; #endif #ifdef CHECKSUM //dev->features |= NETIF_F_IP_CSUM; dev->features |= NETIF_F_IP_CSUM|NETIF_F_SG; #endif db->mii.dev = dev; db->mii.mdio_read = mdio_read; db->mii.mdio_write = mdio_write; db->mii.phy_id = 1; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,20) db->mii.phy_id_mask = 0x1F; db->mii.reg_num_mask = 0x1F; #endif //db->msg_enable =(debug == 0 ? DMFE_DEF_MSG_ENABLE : ((1 << debug) - 1)); /* Read SROM content */ for (i=0; i<64; i++) ((u16 *)db->srom)[i] = read_srom_word(db, i); /* Get the PID and VID from EEPROM to check */ id_val = (((u16 *)db->srom)[4])|(((u16 *)db->srom)[5]<<16); printk("id_val=%x ", id_val); if (id_val == DM9KS_ID || id_val == DM9010_ID) HasEEPROM =1; /* Set Node Address */ for (i=0; i<6; i++) { if (HasEEPROM) /* use EEPROM */ dev->dev_addr[i] = db->srom[i]; else /* No EEPROM */ dev->dev_addr[i] = MAC_addr[i]; } }//end of if() iobase += 0x10; }while(!dm9000_found && iobase <= DM9KS_MAX_IO); return dm9000_found ? 0:-ENODEV; } /* Open the interface. The interface is opened whenever "ifconfig" actives it. */ static int dmfe_open(struct net_device *dev) { board_info_t *db = netdev_priv(dev); u8 reg_nsr; int i; DMFE_DBUG(0, "dmfe_open", 0); if (request_irq(dev->irq,&dmfe_interrupt,IRQF_TRIGGER_RISING,dev->name,dev)) return -EAGAIN; /* Initilize DM910X board */ dmfe_init_dm9000(dev); #ifdef DM8606 // control DM8606 printk("[8606]reg0=0x%04x ",dm8606_read(db,0)); printk("[8606]reg1=0x%04x ",dm8606_read(db,0x1)); #endif /* Init driver variable */ db->reset_counter = 0; db->reset_tx_timeout = 0; db->cont_rx_pkt_cnt = 0; /* check link state and media speed */ db->Speed =10; i=0; do { reg_nsr = ior(db,DM9KS_NSR); if(reg_nsr & 0x40) /* link OK!! */ { /* wait for detected Speed */ mdelay(200); reg_nsr = ior(db,DM9KS_NSR); if(reg_nsr & 0x80) db->Speed =10; else db->Speed =100; break; } i++; mdelay(1); }while(i<3000); /* wait 3 second */ //printk("i=%d Speed=%d ",i,db->Speed); /* set and active a timer process */ init_timer(&db->timer); db->timer.expires = DMFE_TIMER_WUT; db->timer.data = (unsigned long)dev; db->timer.function = &dmfe_timer; add_timer(&db->timer); //Move to DM9000 initiallization was finished. netif_start_queue(dev); return 0; } /* Set PHY operationg mode */ static void set_PHY_mode(board_info_t *db) { #ifndef DM8606 u16 phy_reg0 = 0x1000;/* Auto-negotiation*/ u16 phy_reg4 = 0x01e1; if ( !(db->op_mode & DM9KS_AUTO) ) // op_mode didn't auto sense */ { switch(db->op_mode) { case DM9KS_10MHD: phy_reg4 = 0x21; phy_reg0 = 0x1000; break; case DM9KS_10MFD: phy_reg4 = 0x41; phy_reg0 = 0x1100; break; case DM9KS_100MHD: phy_reg4 = 0x81; phy_reg0 = 0x3000; break; case DM9KS_100MFD: phy_reg4 = 0x101; phy_reg0 = 0x3100; break; default: break; } // end of switch } // end of if #ifdef FLOW_CONTROL phy_write(db, 4, phy_reg4|(1<<10)); #else phy_write(db, 4, phy_reg4); #endif //end of FLOW_CONTROL phy_write(db, 0, phy_reg0|0x200); #else /* Fiber mode */ phy_write(db, 16, 0x4014); phy_write(db, 0, 0x2100); #endif //end of DM8606 if (db->chip_revision == 0x1A) { //set 10M TX idle =65mA (TX 100% utility is 160mA) phy_write(db,20, phy_read(db,20)|(1<<11)|(1<<10)); //:fix harmonic //For short code: //PHY_REG 27 (1Bh) <- 0000h phy_write(db, 27, 0x0000); //PHY_REG 27 (1Bh) <- AA00h phy_write(db, 27, 0xaa00); //PHY_REG 27 (1Bh) <- 0017h phy_write(db, 27, 0x0017); //PHY_REG 27 (1Bh) <- AA17h phy_write(db, 27, 0xaa17); //PHY_REG 27 (1Bh) <- 002Fh phy_write(db, 27, 0x002f); //PHY_REG 27 (1Bh) <- AA2Fh phy_write(db, 27, 0xaa2f); //PHY_REG 27 (1Bh) <- 0037h phy_write(db, 27, 0x0037); //PHY_REG 27 (1Bh) <- AA37h phy_write(db, 27, 0xaa37); //PHY_REG 27 (1Bh) <- 0040h phy_write(db, 27, 0x0040); //PHY_REG 27 (1Bh) <- AA40h phy_write(db, 27, 0xaa40); //For long code: //PHY_REG 27 (1Bh) <- 0050h phy_write(db, 27, 0x0050); //PHY_REG 27 (1Bh) <- AA50h phy_write(db, 27, 0xaa50); //PHY_REG 27 (1Bh) <- 006Bh phy_write(db, 27, 0x006b); //PHY_REG 27 (1Bh) <- AA6Bh phy_write(db, 27, 0xaa6b); //PHY_REG 27 (1Bh) <- 007Dh phy_write(db, 27, 0x007d); //PHY_REG 27 (1Bh) <- AA7Dh phy_write(db, 27, 0xaa7d); //PHY_REG 27 (1Bh) <- 008Dh phy_write(db, 27, 0x008d); //PHY_REG 27 (1Bh) <- AA8Dh phy_write(db, 27, 0xaa8d); //PHY_REG 27 (1Bh) <- 009Ch phy_write(db, 27, 0x009c); //PHY_REG 27 (1Bh) <- AA9Ch phy_write(db, 27, 0xaa9c); //PHY_REG 27 (1Bh) <- 00A3h phy_write(db, 27, 0x00a3); //PHY_REG 27 (1Bh) <- AAA3h phy_write(db, 27, 0xaaa3); //PHY_REG 27 (1Bh) <- 00B1h phy_write(db, 27, 0x00b1); //PHY_REG 27 (1Bh) <- AAB1h phy_write(db, 27, 0xaab1); //PHY_REG 27 (1Bh) <- 00C0h phy_write(db, 27, 0x00c0); //PHY_REG 27 (1Bh) <- AAC0h phy_write(db, 27, 0xaac0); //PHY_REG 27 (1Bh) <- 00D2h phy_write(db, 27, 0x00d2); //PHY_REG 27 (1Bh) <- AAD2h phy_write(db, 27, 0xaad2); //PHY_REG 27 (1Bh) <- 00E0h phy_write(db, 27, 0x00e0); //PHY_REG 27 (1Bh) <- AAE0h phy_write(db, 27, 0xaae0); //PHY_REG 27 (1Bh) <- 0000h phy_write(db, 27, 0x0000); } } /* Initilize dm9000 board */ static void dmfe_init_dm9000(struct net_device *dev) { board_info_t *db = netdev_priv(dev); DMFE_DBUG(0, "dmfe_init_dm9000()", 0); spin_lock_init(&db->lock); iow(db, DM9KS_GPR, 0); /* GPR (reg_1Fh)bit GPIO0=0 pre-activate PHY */ mdelay(20); /* wait for PHY power-on ready */ /* do a software reset and wait 20us */ iow(db, DM9KS_NCR, 3); udelay(20); /* wait 20us at least for software reset ok */ iow(db, DM9KS_NCR, 3); /* NCR (reg_00h) bit[0] RST=1 & Loopback=1, reset on */ udelay(20); /* wait 20us at least for software reset ok */ /* I/O mode */ db->io_mode = ior(db, DM9KS_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */ /* Set PHY */ db->op_mode = media_mode; set_PHY_mode(db); /* Program operating register */ iow(db, DM9KS_NCR, 0); iow(db, DM9KS_TCR, 0); /* TX Polling clear */ iow(db, DM9KS_BPTR, 0x3f); /* Less 3kb, 600us */ iow(db, DM9KS_SMCR, 0); /* Special Mode */ iow(db, DM9KS_NSR, 0x2c); /* clear TX status */ iow(db, DM9KS_ISR, 0x0f); /* Clear interrupt status */ iow(db, DM9KS_TCR2, 0x80); /* Set LED mode 1 */ if (db->chip_revision == 0x1A){ /* Data bus current driving/sinking capability */ iow(db, DM9KS_BUSCR, 0x01); /* default: 2mA */ } #ifdef FLOW_CONTROL iow(db, DM9KS_BPTR, 0x37); iow(db, DM9KS_FCTR, 0x38); iow(db, DM9KS_FCR, 0x29); #endif #ifdef DM8606 iow(db,0x34,1); #endif if (dev->features & NETIF_F_HW_CSUM){ printk(KERN_INFO "DM9KS:enable TX checksum "); iow(db, DM9KS_TCCR, 0x07); /* TX UDP/TCP/IP checksum enable */ } if (db->rx_csum){ printk(KERN_INFO "DM9KS:enable RX checksum "); iow(db, DM9KS_RCSR, 0x02); /* RX checksum enable */ } #ifdef ETRANS /*If TX loading is heavy, the driver can try to anbel "early transmit". The programmer can tune the "Early Transmit Threshold" to get the optimization. (DM9KS_ETXCSR.[1-0]) Side Effect: It will happen "Transmit under-run". When TX under-run always happens, the programmer can increase the value of "Early Transmit Threshold". */ iow(db, DM9KS_ETXCSR, 0x83); #endif /* Set address filter table */ dm9000_hash_table(dev); /* Activate DM9000/DM9010 */ iow(db, DM9KS_IMR, DM9KS_REGFF); /* Enable TX/RX interrupt mask */ iow(db, DM9KS_RXCR, DM9KS_REG05 | 1); /* RX enable */ /* Init Driver variable */ db->tx_pkt_cnt = 0; netif_carrier_on(dev); } /* Hardware start transmission. Send a packet to media from the upper layer. */ static int dmfe_start_xmit(struct sk_buff *skb, struct net_device *dev) { board_info_t *db = netdev_priv(dev); char * data_ptr; int i, tmplen; u16 MDWAH, MDWAL; #ifdef TDBUG /* check TX FIFO pointer */ u16 MDWAH1, MDWAL1; u16 tx_ptr; #endif DMFE_DBUG(0, "dmfe_start_xmit", 0); if (db->chip_revision != 0x1A) { if(db->Speed == 10) {if (db->tx_pkt_cnt >= 1) return 1;} else {if (db->tx_pkt_cnt >= 2) return 1;} }else if (db->tx_pkt_cnt >= 2) return 1; /* packet counting */ db->tx_pkt_cnt++; db->stats.tx_packets++; db->stats.tx_bytes+=skb->len; if (db->chip_revision != 0x1A) { if (db->Speed == 10) {if (db->tx_pkt_cnt >= 1) netif_stop_queue(dev);} else {if (db->tx_pkt_cnt >= 2) netif_stop_queue(dev);} }else if (db->tx_pkt_cnt >= 2) netif_stop_queue(dev); /* Disable all interrupt */ iow(db, DM9KS_IMR, DM9KS_DISINTR); MDWAH = ior(db,DM9KS_MDWAH); MDWAL = ior(db,DM9KS_MDWAL); /* Set TX length to reg. 0xfc & 0xfd */ iow(db, DM9KS_TXPLL, (skb->len & 0xff)); iow(db, DM9KS_TXPLH, (skb->len >> 8) & 0xff); /* Move data to TX SRAM */ data_ptr = (char *)skb->data; outb(DM9KS_MWCMD, db->io_addr); // Write data into SRAM trigger switch(db->io_mode) { case DM9KS_BYTE_MODE: for (i = 0; i < skb->len; i++) outb((data_ptr[i] & 0xff), db->io_data); break; case DM9KS_WORD_MODE: tmplen = (skb->len + 1) / 2; for (i = 0; i < tmplen; i++) outw(((u16 *)data_ptr)[i], db->io_data); break; case DM9KS_DWORD_MODE: tmplen = (skb->len + 3) / 4; for (i = 0; i< tmplen; i++) outl(((u32 *)data_ptr)[i], db->io_data); break; } #ifndef ETRANS /* Issue TX polling command */ iow(db, DM9KS_TCR, 0x1); /* Cleared after TX complete*/ #endif #ifdef TDBUG /* check TX FIFO pointer */ MDWAH1 = ior(db,DM9KS_MDWAH); MDWAL1 = ior(db,DM9KS_MDWAL); tx_ptr = (MDWAH<<8)|MDWAL; switch (db->io_mode) { case DM9KS_BYTE_MODE: tx_ptr += skb->len; break; case DM9KS_WORD_MODE: tx_ptr += ((skb->len + 1) / 2)*2; break; case DM9KS_DWORD_MODE: tx_ptr += ((skb->len+3)/4)*4; break; } if (tx_ptr > 0x0bff) tx_ptr -= 0x0c00; if (tx_ptr != ((MDWAH1<<8)|MDWAL1)) printk("[dm9ks:TX FIFO ERROR "); #endif /* Saved the time stamp */ dev->trans_start = jiffies; db->cont_rx_pkt_cnt =0; /* Free this SKB */ dev_kfree_skb(skb); /* Re-enable interrupt */ iow(db, DM9KS_IMR, DM9KS_REGFF); return 0; } /* Stop the interface. The interface is stopped when it is brought. */ static int dmfe_stop(struct net_device *dev) { board_info_t *db = netdev_priv(dev); DMFE_DBUG(0, "dmfe_stop", 0); /* deleted timer */ del_timer(&db->timer); netif_stop_queue(dev); /* free interrupt */ free_irq(dev->irq, dev); /* RESET devie */ phy_write(db, 0x00, 0x8000); /* PHY RESET */ //iow(db, DM9KS_GPR, 0x01); /* Power-Down PHY */ iow(db, DM9KS_IMR, DM9KS_DISINTR); /* Disable all interrupt */ iow(db, DM9KS_RXCR, 0x00); /* Disable RX */ /* Dump Statistic counter */ #if FALSE printk(" RX FIFO OVERFLOW %lx ", db->stats.rx_fifo_errors); printk("RX CRC %lx ", db->stats.rx_crc_errors); printk("RX LEN Err %lx ", db->stats.rx_length_errors); printk("RESET %x ", db->reset_counter); printk("RESET: TX Timeout %x ", db->reset_tx_timeout); printk("g_TX_nsr %x ", g_TX_nsr); #endif return 0; } static void dmfe_tx_done(unsigned long unused) { struct net_device *dev = dmfe_dev; board_info_t *db = netdev_priv(dev); int nsr; DMFE_DBUG(0, "dmfe_tx_done()", 0); nsr = ior(db, DM9KS_NSR); if (nsr & 0x0c) { if(nsr & 0x04) db->tx_pkt_cnt--; if(nsr & 0x08) db->tx_pkt_cnt--; if(db->tx_pkt_cnt < 0) { printk(KERN_DEBUG "DM9KS:tx_pkt_cnt ERROR!! "); while(ior(db,DM9KS_TCR) & 0x1){} db->tx_pkt_cnt = 0; } }else{ while(ior(db,DM9KS_TCR) & 0x1){} db->tx_pkt_cnt = 0; } netif_wake_queue(dev); return; } /* DM9000 insterrupt handler receive the packet to upper layer, free the transmitted packet */ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) static void dmfe_interrupt(int irq, void *dev_id, struct pt_regs *regs) #else #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19) static irqreturn_t dmfe_interrupt(int irq, void *dev_id, struct pt_regs *regs) #else static irqreturn_t dmfe_interrupt(int irq, void *dev_id) /* for kernel 2.6.20*/ #endif #endif { struct net_device *dev = dev_id; board_info_t *db; int int_status,i; u8 reg_save; DMFE_DBUG(0, "dmfe_interrupt()", 0); /* A real interrupt coming */ db = netdev_priv(dev); spin_lock(&db->lock); /* Save previous register address */ reg_save = inb(db->io_addr); /* Disable all interrupt */ iow(db, DM9KS_IMR, DM9KS_DISINTR); /* Got DM9000/DM9010 interrupt status */ int_status = ior(db, DM9KS_ISR); /* Got ISR */ iow(db, DM9KS_ISR, int_status); /* Clear ISR status */ /* Link status change */ if (int_status & DM9KS_LINK_INTR) { netif_stop_queue(dev); for(i=0; i<500; i++) /*wait link OK, waiting time =0.5s */ { phy_read(db,0x1); if(phy_read(db,0x1) & 0x4) /*Link OK*/ { /* wait for detected Speed */ for(i=0; i<200;i++) udelay(1000); /* set media speed */ if(phy_read(db,0)&0x2000) db->Speed =100; else db->Speed =10; break; } udelay(1000); } netif_wake_queue(dev); //printk("[INTR]i=%d speed=%d ",i, (int)(db->Speed)); } /* Received the coming packet */ if (int_status & DM9KS_RX_INTR) dmfe_packet_receive(dev); /* Trnasmit Interrupt check */ if (int_status & DM9KS_TX_INTR) dmfe_tx_done(0); if (db->cont_rx_pkt_cnt>=CONT_RX_PKT_CNT) { iow(db, DM9KS_IMR, 0xa2); } else { /* Re-enable interrupt mask */ iow(db, DM9KS_IMR, DM9KS_REGFF); } /* Restore previous register address */ outb(reg_save, db->io_addr); spin_unlock(&db->lock); #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0) return IRQ_HANDLED; #endif } /* Get statistics from driver. */ static struct net_device_stats * dmfe_get_stats(struct net_device *dev) { board_info_t *db = netdev_priv(dev); DMFE_DBUG(0, "dmfe_get_stats", 0); return &db->stats; } /* * Process the ethtool ioctl command */ static int dmfe_ethtool_ioctl(struct net_device *dev, void *useraddr) { //struct dmfe_board_info *db = dev->priv; struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO }; u32 ethcmd; if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) return -EFAULT; switch (ethcmd) { case ETHTOOL_GDRVINFO: strcpy(info.driver, DRV_NAME); strcpy(info.version, DRV_VERSION); sprintf(info.bus_info, "ISA 0x%lx %d",dev->base_addr, dev->irq); if (copy_to_user(useraddr, &info, sizeof(info))) return -EFAULT; return 0; } return -EOPNOTSUPP; } /* Process the upper socket ioctl command */ static int dmfe_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { board_info_t *db = netdev_priv(dev); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7) /* for kernel 2.6.7 */ struct mii_ioctl_data *data=(struct mii_ioctl_data *)&ifr->ifr_data; #endif int rc=0; DMFE_DBUG(0, "dmfe_do_ioctl()", 0); if (!netif_running(dev)) return -EINVAL; if (cmd == SIOCETHTOOL) rc = dmfe_ethtool_ioctl(dev, (void *) ifr->ifr_data); else { spin_lock_irq(&db->lock); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7) /* for kernel 2.6.7 */ rc = generic_mii_ioctl(&db->mii, data, cmd, NULL); #else rc = generic_mii_ioctl(&db->mii, if_mii(ifr), cmd, NULL); #endif spin_unlock_irq(&db->lock); } return rc; } /* Our watchdog timed out. Called by the networking layer */ static void dmfe_timeout(struct net_device *dev) { board_info_t *db = netdev_priv(dev); int i; DMFE_DBUG(0, "dmfe_TX_timeout()", 0); printk("TX time-out -- dmfe_timeout(). "); db->reset_tx_timeout++; db->stats.tx_errors++; #if FALSE printk("TX packet count = %d ", db->tx_pkt_cnt); printk("TX timeout = %d ", db->reset_tx_timeout); printk("22H=0x%02x 23H=0x%02x ",ior(db,0x22),ior(db,0x23)); printk("faH=0x%02x fbH=0x%02x ",ior(db,0xfa),ior(db,0xfb)); #endif i=0; while((i++<100)&&(ior(db,DM9KS_TCR) & 0x01)) { udelay(30); } if(i<100) { db->tx_pkt_cnt = 0; netif_wake_queue(dev); } else { dmfe_reset(dev); } } static void dmfe_reset(struct net_device * dev) { board_info_t *db = netdev_priv(dev); u8 reg_save; int i; /* Save previous register address */ reg_save = inb(db->io_addr); netif_stop_queue(dev); db->reset_counter++; dmfe_init_dm9000(dev); db->Speed =10; for(i=0; i<1000; i++) /*wait link OK, waiting time=1 second */ { if(phy_read(db,0x1) & 0x4) /*Link OK*/ { if(phy_read(db,0)&0x2000) db->Speed =100; else db->Speed =10; break; } udelay(1000); } netif_wake_queue(dev); /* Restore previous register address */ outb(reg_save, db->io_addr); } /* A periodic timer routine */ static void dmfe_timer(unsigned long data) { struct net_device * dev = (struct net_device *)data; board_info_t *db = netdev_priv(dev); DMFE_DBUG(0, "dmfe_timer()", 0); if (db->cont_rx_pkt_cnt>=CONT_RX_PKT_CNT) { db->cont_rx_pkt_cnt=0; iow(db, DM9KS_IMR, DM9KS_REGFF); } /* Set timer again */ db->timer.expires = DMFE_TIMER_WUT; add_timer(&db->timer); return; } /* Received a packet and pass to upper layer */ static void dmfe_packet_receive(struct net_device *dev) { board_info_t *db = netdev_priv(dev); struct sk_buff *skb; u8 rxbyte; u16 i, GoodPacket, tmplen = 0, MDRAH, MDRAL; u32 tmpdata; rx_t rx; u16 * ptr = (u16*)℞ u8* rdptr; DMFE_DBUG(0, "dmfe_packet_receive()", 0); db->cont_rx_pkt_cnt=0; do { /*store the value of Memory Data Read address register*/ MDRAH=ior(db, DM9KS_MDRAH); MDRAL=ior(db, DM9KS_MDRAL); ior(db, DM9KS_MRCMDX); /* Dummy read */ rxbyte = inb(db->io_data); /* Got most updated data */ #ifdef CHECKSUM if (rxbyte&0x2) /* check RX byte */ { printk("dm9ks: abnormal! "); dmfe_reset(dev); break; }else { if (!(rxbyte&0x1)) break; } #else if (rxbyte==0) break; if (rxbyte>1) { printk("dm9ks: Rxbyte error! "); dmfe_reset(dev); break; } #endif /* A packet ready now & Get status/length */ GoodPacket = TRUE; outb(DM9KS_MRCMD, db->io_addr); /* Read packet status & length */ switch (db->io_mode) { case DM9KS_BYTE_MODE: *ptr = inb(db->io_data) + (inb(db->io_data) << 8); *(ptr+1) = inb(db->io_data) + (inb(db->io_data) << 8); break; case DM9KS_WORD_MODE: *ptr = inw(db->io_data); *(ptr+1) = inw(db->io_data); break; case DM9KS_DWORD_MODE: tmpdata = inl(db->io_data); *ptr = tmpdata; *(ptr+1) = tmpdata >> 16; break; default: break; } /* Packet status check */ if (rx.desc.status & 0xbf) { GoodPacket = FALSE; if (rx.desc.status & 0x01) { db->stats.rx_fifo_errors++; printk(KERN_INFO"<RX FIFO error> "); } if (rx.desc.status & 0x02) { db->stats.rx_crc_errors++; printk(KERN_INFO"<RX CRC error> "); } if (rx.desc.status & 0x80) { db->stats.rx_length_errors++; printk(KERN_INFO"<RX Length error> "); } if (rx.desc.status & 0x08) printk(KERN_INFO"<Physical Layer error> "); } if (!GoodPacket) { // drop this packet!!! switch (db->io_mode) { case DM9KS_BYTE_MODE: for (i=0; i<rx.desc.length; i++) inb(db->io_data); break; case DM9KS_WORD_MODE: tmplen = (rx.desc.length + 1) / 2; for (i = 0; i < tmplen; i++) inw(db->io_data); break; case DM9KS_DWORD_MODE: tmplen = (rx.desc.length + 3) / 4; for (i = 0; i < tmplen; i++) inl(db->io_data); break; } continue;/*next the packet*/ } skb = dev_alloc_skb(rx.desc.length+4); if (skb == NULL ) { printk(KERN_INFO "%s: Memory squeeze. ", dev->name); /*re-load the value into Memory data read address register*/ iow(db,DM9KS_MDRAH,MDRAH); iow(db,DM9KS_MDRAL,MDRAL); return; } else { /* Move data from DM9000 */ skb->dev = dev; skb_reserve(skb, 2); rdptr = (u8*)skb_put(skb, rx.desc.length - 4); /* Read received packet from RX SARM */ switch (db->io_mode) { case DM9KS_BYTE_MODE: for (i=0; i<rx.desc.length; i++) rdptr[i]=inb(db->io_data); break; case DM9KS_WORD_MODE: tmplen = (rx.desc.length + 1) / 2; for (i = 0; i < tmplen; i++) ((u16 *)rdptr)[i] = inw(db->io_data); break; case DM9KS_DWORD_MODE: tmplen = (rx.desc.length + 3) / 4; for (i = 0; i < tmplen; i++) ((u32 *)rdptr)[i] = inl(db->io_data); break; } /* Pass to upper layer */ skb->protocol = eth_type_trans(skb,dev); #ifdef CHECKSUM if((rxbyte&0xe0)==0) /* receive packet no checksum fail */ skb->ip_summed = CHECKSUM_UNNECESSARY; #endif netif_rx(skb); dev->last_rx=jiffies; db->stats.rx_packets++; db->stats.rx_bytes += rx.desc.length; db->cont_rx_pkt_cnt++; #ifdef RDBG /* check RX FIFO pointer */ u16 MDRAH1, MDRAL1; u16 tmp_ptr; MDRAH1 = ior(db,DM9KS_MDRAH); MDRAL1 = ior(db,DM9KS_MDRAL); tmp_ptr = (MDRAH<<8)|MDRAL; switch (db->io_mode) { case DM9KS_BYTE_MODE: tmp_ptr += rx.desc.length+4; break; case DM9KS_WORD_MODE: tmp_ptr += ((rx.desc.length+1)/2)*2+4; break; case DM9KS_DWORD_MODE: tmp_ptr += ((rx.desc.length+3)/4)*4+4; break; } if (tmp_ptr >=0x4000) tmp_ptr = (tmp_ptr - 0x4000) + 0xc00; if (tmp_ptr != ((MDRAH1<<8)|MDRAL1)) printk("[dm9ks:RX FIFO ERROR "); #endif if (db->cont_rx_pkt_cnt>=CONT_RX_PKT_CNT) { dmfe_tx_done(0); break; } } }while((rxbyte & 0x01) == DM9KS_PKT_RDY); DMFE_DBUG(0, "[END]dmfe_packet_receive()", 0); } /* Read a word data from SROM */ static u16 read_srom_word(board_info_t *db, int offset) { iow(db, DM9KS_EPAR, offset); iow(db, DM9KS_EPCR, 0x4); while(ior(db, DM9KS_EPCR)&0x1); /* Wait read complete */ iow(db, DM9KS_EPCR, 0x0); return (ior(db, DM9KS_EPDRL) + (ior(db, DM9KS_EPDRH) << 8) ); } #if 0 /* Set DM9000/DM9010 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]; DMFE_DBUG(0, "dm9000_hash_table()", 0); /* enable promiscuous mode */ if (dev->flags & IFF_PROMISC){ //printk(KERN_INFO "DM9KS:enable promiscuous mode "); iow(db, DM9KS_RXCR, ior(db,DM9KS_RXCR)|(1<<1)); return; }else{ //printk(KERN_INFO "DM9KS:disable promiscuous mode "); iow(db, DM9KS_RXCR, ior(db,DM9KS_RXCR)&(~(1<<1))); } /* Receive all multicast packets */ if (dev->flags & IFF_ALLMULTI){ //printk(KERN_INFO "DM9KS:Pass all multicast "); iow(db, DM9KS_RXCR, ior(db,DM9KS_RXCR)|(1<<3)); }else{ //printk(KERN_INFO "DM9KS:Disable pass all multicast "); iow(db, DM9KS_RXCR, ior(db,DM9KS_RXCR)&(~(1<<3))); } /* Set Node address */ 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); } } #else /* * 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]; u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN; //dm9000_dbg(db, 1, "entering %s ", __func__); for (i = 0, oft = DM9000_PAR; 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; 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); } #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; } static int mdio_read(struct net_device *dev, int phy_id, int location) { board_info_t *db = netdev_priv(dev); return phy_read(db, location); } static void mdio_write(struct net_device *dev, int phy_id, int location, int val) { board_info_t *db = netdev_priv(dev); phy_write(db, location, val); } /* Read a byte from I/O port */ u8 ior(board_info_t *db, int reg) { outb(reg, db->io_addr); return inb(db->io_data); } /* Write a byte to I/O port */ void iow(board_info_t *db, int reg, u8 value) { outb(reg, db->io_addr); outb(value, db->io_data); } /* Read a word from phyxcer */ static u16 phy_read(board_info_t *db, int reg) { /* Fill the phyxcer register into REG_0C */ iow(db, DM9KS_EPAR, DM9KS_PHY | reg); iow(db, DM9KS_EPCR, 0xc); /* Issue phyxcer read command */ while(ior(db, DM9KS_EPCR)&0x1); /* Wait read complete */ iow(db, DM9KS_EPCR, 0x0); /* Clear phyxcer read command */ /* The read data keeps on REG_0D & REG_0E */ return ( ior(db, DM9KS_EPDRH) << 8 ) | ior(db, DM9KS_EPDRL); } /* Write a word to phyxcer */ static void phy_write(board_info_t *db, int reg, u16 value) { /* Fill the phyxcer register into REG_0C */ iow(db, DM9KS_EPAR, DM9KS_PHY | reg); /* Fill the written data into REG_0D & REG_0E */ iow(db, DM9KS_EPDRL, (value & 0xff)); iow(db, DM9KS_EPDRH, ( (value >> 8) & 0xff)); iow(db, DM9KS_EPCR, 0xa); /* Issue phyxcer write command */ while(ior(db, DM9KS_EPCR)&0x1); /* Wait read complete */ iow(db, DM9KS_EPCR, 0x0); /* Clear phyxcer write command */ } //====dmfe_ethtool_ops member functions==== static void dmfe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { //board_info_t *db = netdev_priv(dev); strcpy(info->driver, DRV_NAME); strcpy(info->version, DRV_VERSION); sprintf(info->bus_info, "ISA 0x%lx irq=%d",dev->base_addr, dev->irq); } static int dmfe_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { board_info_t *db = netdev_priv(dev); spin_lock_irq(&db->lock); mii_ethtool_gset(&db->mii, cmd); spin_unlock_irq(&db->lock); return 0; } static int dmfe_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) { board_info_t *db = netdev_priv(dev); int rc; spin_lock_irq(&db->lock); rc = mii_ethtool_sset(&db->mii, cmd); spin_unlock_irq(&db->lock); return rc; } /* * Check the link state */ static u32 dmfe_get_link(struct net_device *dev) { board_info_t *db = netdev_priv(dev); return mii_link_ok(&db->mii); } /* * Reset Auto-negitiation */ static int dmfe_nway_reset(struct net_device *dev) { board_info_t *db = netdev_priv(dev); return mii_nway_restart(&db->mii); } /* * Get RX checksum offload state */ static uint32_t dmfe_get_rx_csum(struct net_device *dev) { board_info_t *db = netdev_priv(dev); return db->rx_csum; } /* * Get TX checksum offload state */ static uint32_t dmfe_get_tx_csum(struct net_device *dev) { return (dev->features & NETIF_F_HW_CSUM) != 0; } /* * Enable/Disable RX checksum offload */ static int dmfe_set_rx_csum(struct net_device *dev, uint32_t data) { #ifdef CHECKSUM board_info_t *db = netdev_priv(dev); db->rx_csum = data; if(netif_running(dev)) { dmfe_stop(dev); dmfe_open(dev); } else dmfe_init_dm9000(dev); #else printk(KERN_ERR "DM9:Don't support checksum "); #endif return 0; } /* * Enable/Disable TX checksum offload */ static int dmfe_set_tx_csum(struct net_device *dev, uint32_t data) { #ifdef CHECKSUM if (data) dev->features |= NETIF_F_HW_CSUM; else dev->features &= ~NETIF_F_HW_CSUM; #else printk(KERN_ERR "DM9:Don't support checksum "); #endif return 0; } //========================================= #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,28) /* for kernel 2.4.28 */ static struct ethtool_ops dmfe_ethtool_ops = { .get_drvinfo = dmfe_get_drvinfo, .get_settings = dmfe_get_settings, .set_settings = dmfe_set_settings, .get_link = dmfe_get_link, .nway_reset = dmfe_nway_reset, //.get_rx_csum = dmfe_get_rx_csum, //.set_rx_csum = dmfe_set_rx_csum, //.get_tx_csum = dmfe_get_tx_csum, //.set_tx_csum = dmfe_set_tx_csum, }; #endif MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Davicom DM9000/DM9010 ISA/uP Fast Ethernet Driver"); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) MODULE_PARM(mode, "i"); MODULE_PARM(irq, "i"); MODULE_PARM(iobase, "i"); #else module_param(mode, int, 0); module_param(irq, int, 0); module_param(iobase, int, 0); #endif MODULE_PARM_DESC(mode,"Media Speed, 0:10MHD, 1:10MFD, 4:100MHD, 5:100MFD"); MODULE_PARM_DESC(irq,"EtherLink IRQ number"); MODULE_PARM_DESC(iobase, "EtherLink I/O base address"); /* Description: when user used insmod to add module, system invoked init_module() to initilize and register. */ int __init dm9000c_init(void) { volatile unsigned long *BWSCON; volatile unsigned long *BANKCON4; iobase = (int)ioremap(0x20000000, 4096); irq = IRQ_EINT7; /* 设置硬件相关 */ BWSCON = ioremap(0x48000000, 4); BANKCON4 = ioremap(0x48000014, 4); /* ST4[19] ：0 = 未使用UB/LB * WS4[18] : 0 = WAIT禁止 * DW4[17:16] : 01 = 16位 */ *BWSCON &= ~(0xf<<16); *BWSCON |= (1<<16); /* * Tacs[14:13]: 发出片选信号之前,多长时间内要先发出地址信号 * DM9000C的片选信号和CMD信号可以同时发出, * 所以它设为0 * Tcos[12:11]: 发出片选信号之后,多长时间才能发出读信号nOE * DM9000C的T1>=0ns, * 所以它设为0 * Tacc[10:8] : 读写信号的脉冲长度, * DM9000C的T2>=10ns, * 所以它设为1, 表示2个hclk周期,hclk=100MHz,就是20ns * Tcoh[7:6] : 当读信号nOE变为高电平后,片选信号还要维持多长时间 * DM9000C进行写操作时, nWE变为高电平之后, 数据线上的数据还要维持最少3ns * DM9000C进行读操作时, nOE变为高电平之后, 数据线上的数据在6ns之内会消失 * 我们取一个宽松值: 让片选信号在nOE放为高电平后,再维持10ns, * 所以设为01 * Tcah[5:4] : 当片选信号变为高电平后, 地址信号还要维持多长时间 * DM9000C的片选信号和CMD信号可以同时出现,同时消失 * 所以设为0 * PMC[1:0] : 00-正常模式 * */ *BANKCON4 = (7<<8)|(1<<6); iounmap(BWSCON); iounmap(BANKCON4); switch(mode) { case DM9KS_10MHD: case DM9KS_100MHD: case DM9KS_10MFD: case DM9KS_100MFD: media_mode = mode; break; default: media_mode = DM9KS_AUTO; } dmfe_dev = dmfe_probe(); if(IS_ERR(dmfe_dev)) return PTR_ERR(dmfe_dev); return 0; } /* Description: when user used rmmod to delete module, system invoked clean_module() to un-register DEVICE. */ void __exit dm9000c_exit(void) { struct net_device *dev = dmfe_dev; DMFE_DBUG(0, "clean_module()", 0); unregister_netdev(dmfe_dev); release_region(dev->base_addr, 2); #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) kfree(dev); #else free_netdev(dev); iounmap((void *)iobase); #endif DMFE_DBUG(0, "clean_module() exit", 0); } module_init(dm9000c_init); module_exit(dm9000c_exit);