dm9000x.c

这个源码相信对很多用arm开发板开发的人会有用的

	    for (i = 0; i < 6; i++)
		dev->dev_addr[i] = db->srom[i];
#else
	    //random_ether_addr(dev->dev_addr);	// mhfan
	{
	    ////unsigned char enet_addr[]={0x26, 0xdc, 0x6c, 0x11, 0x7b, 0xbb}; //origion
	    unsigned char  enet_addr[6] = {0x00, 0x13, 0xf6, 0x6c, 0x87, 0x89}; //from 2.4
	    for (i=0; i < 6; i++) dev->dev_addr[i] = enet_addr[i];
	}
#endif	/* comment by mhfan */

	    /* Request IO from system */
	    request_region(iobase, 2, dev->name);
	}
    } while (!dm9000_found && (iobase+=0x10) <= DM9000_MAX_IO);
	
   printk("\n\nsun----dmfe_probe_exit\n\n");
    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 = (board_info_t *) dev->priv;
	
  printk("\n\nsun----dmfe_open\n\n");
  
    DMFE_DBUG(0, "dmfe_open", 0);
    //MOD_INC_USE_COUNT;

	//printk("net irq num is %d\n",dev->irq);
         //dev->irq=0;  //--
        // dev->irq=IRQ_EINT0 ;  //--
         printk("net irq num is %d\n",dev->irq);
	 printk("dev->name  is %s\n",dev->name);

	// set_irq_type(dev->irq, IRQT_RISING);
	 
										//net irq num is 0

										//dev->name  is eth0
    //if (request_irq(dev->irq, &dmfe_interrupt, SA_INTERRUPT/*SA_SHIRQ*/, dev->name, dev))
    if (request_irq(dev->irq, &dmfe_interrupt, /*SA_INTERRUPT*/SA_SHIRQ, dev->name/*"DM9000 device"*/, dev))
    	{
    	  printk("\n\nsun----request_irq failure\n\n");
  
//   if (request_irq(dev->irq, &dmfe_interrupt, SA_INTERRUPT, dev->name, dev))
	return -EAGAIN;
    	}
     	 //printk("sun-----requets irq exit\n");
		 /*
		//writel(0x04|0x4,extint0);  //OLD
   	writel(readl(extint0)|0x4444,extint0); //rising edge
	//writel(readl(intmsk)&0xfff7,intmsk);   //OLD
    	  writel(readl(intmsk)&0xfffffff0,intmsk); //mask open
	
	 printk("sun-----set irq register exit\n");
	 */

    /* Initilize DM910X board */
    dmfe_init_dm9000(dev);

    /* Init driver variable */
    db->dbug_cnt	    = 0;
    db->runt_length_counter = 0;
    db->long_length_counter = 0;
    db->reset_counter	    = 0;

    /* set and active a timer process */
    init_timer(&db->timer);
    db->timer.expires	    = DMFE_TIMER_WUT * 2;
    db->timer.data	    = (unsigned long) dev;
    db->timer.function	    = &dmfe_timer;
    add_timer(&db->timer);	// Move to DM9000 initiallization was finished.

#if defined(AUTOMDIX)
    /* set and active a timer process for Auto-MDIX */
    init_timer(&db->mdix_timer);
    db->mdix_timer.expires  = DMFE_TIMER_MDIX;
    db->mdix_timer.data	    = (unsigned long) dev;
    db->mdix_timer.function = &dmfe_mdix_timer;
    add_timer(&db->mdix_timer);
#endif

    netif_start_queue(dev);

    enable_irq(dev->irq);

    return 0;
}

/* Set PHY operationg mode */
static void set_PHY_mode(board_info_t * db)
{
    u16 phy_reg0 = 0x1000;	/* Auto-negotiation & non-duplux mode */
    u16 phy_reg4 = 0x01e1;	/* Default non flow control */

    if (!(db->op_mode & DM9000_AUTO)) {	// op_mode didn't auto sense */
	switch (db->op_mode) {
	case DM9000_10MHD:
	    phy_reg4 = 0x21;
	    phy_reg0 = 0x0000;
	    break;
	case DM9000_10MFD:
	    phy_reg4 = 0x41;
	    phy_reg0 = 0x1100;
	    break;
	case DM9000_100MHD:
	    phy_reg4 = 0x81;
	    phy_reg0 = 0x2000;
	    break;
	case DM9000_100MFD:
	    phy_reg4 = 0x101;
	    phy_reg0 = 0x3100;
	    break;
	}			// end of switch
    }				// end of if
    phy_write(db, 0, phy_reg0);
    phy_write(db, 4, 0x0400 | phy_reg4);
    db->Preg0 = phy_reg0;
    db->Preg4 = phy_reg4 + 0x0400;
}

/* Init HomeRun DM9801 */
static void program_dm9801(board_info_t * db, u16 HPNA_rev)
{
    __u16 reg16, reg17, reg24, reg25;

    if (!nfloor) nfloor = DM9801_NOISE_FLOOR;

    reg16 = phy_read(db, 16);
    reg17 = phy_read(db, 17);
    reg24 = phy_read(db, 24);
    reg25 = phy_read(db, 25);

    switch (HPNA_rev) {
    case 0xb900:		/* DM9801 E3 */
	reg16 |= 0x1000;
	reg25 = ((reg24 + nfloor) & 0x00ff) | 0xf000;
	break;
    case 0xb901:		/* DM9801 E4 */
	reg25 = ((reg24 + nfloor) & 0x00ff) | 0xc200;
	reg17 = (reg17 & 0xfff0) + nfloor + 3;
	break;
    case 0xb902:		/* DM9801 E5 */
    case 0xb903:		/* DM9801 E6 */
    default:
	reg16 |= 0x1000;
	reg25 = ((reg24 + nfloor - 3) & 0x00ff) | 0xc200;
	reg17 = (reg17 & 0xfff0) + nfloor;
    }

    phy_write(db, 16, reg16);
    phy_write(db, 17, reg17);
    phy_write(db, 25, reg25);
}

/* Init LongRun DM9802 */
static void program_dm9802(board_info_t * db)
{
    __u16 reg25;

    if (!nfloor) nfloor = DM9802_NOISE_FLOOR;

    reg25 = phy_read(db, 25);
    reg25 = (reg25 & 0xff00) + nfloor;
    phy_write(db, 25, reg25);
}

/* Identify NIC type */
static void identify_nic(board_info_t * db)
{
    u16 phy_reg3;

    iow(db, 0, DM9000_EXT_MII);
    phy_reg3 = phy_read(db, 3);

    switch (phy_reg3 & 0xfff0) {

    case 0xb900:

	if (phy_read(db, 31) == 0x4404) {
	    db->nic_type = HOMERUN_NIC;
	    program_dm9801(db, phy_reg3);
	} else {
	    db->nic_type = LONGRUN_NIC;
	    program_dm9802(db);
	}
	break;
    default:
	db->nic_type = FASTETHER_NIC;
	break;
    }

    iow(db, 0, DM9000_INT_MII);
}

/* Initilize dm9000 board */
static void dmfe_init_dm9000(struct net_device *dev)
{
    board_info_t *db = (board_info_t *) dev->priv;
    //printk("\n\nsun----dmfe_init_dm9000\n\n");
    DMFE_DBUG(0, "dmfe_init_dm9000()", 0);

    /* set the internal PHY power-on, GPIOs normal, and wait 2ms */
    iow(db, 0x1F, 0);		/* GPR (reg_1Fh)bit GPIO0=0 pre-activate PHY */
    udelay(20);			/* wait 2ms for PHY power-on ready */

    /* do a software reset and wait 20us */
    iow(db, DM9000_NCR, 3);
    udelay(20);			/* wait 20us at least for software reset ok */
    iow(db, 0, 3);		/* NCR (reg_00h) bit[0] RST=1 & Loopback=1,
				 * reset on. Added by SPenser */
    udelay(20);			/* wait 20us at least for software reset ok */

// Marked by Spenser
    /* set GPIO0=1 then GPIO0=0 to turn off and on the internal PHY */
    iow(db, 0x1F, 1);		/* GPR (reg_1Fh) bit[0] GPIO0=1 turn-off PHY  */
    iow(db, 0x1F, 0);		/* GPR (reg_1Fh) bit[0] GPIO0=0 activate PHY  */
//modify by he
    udelay(1000);		/* wait 4ms linking PHY (AUTO sense) if RX/TX */
    udelay(1000);
    udelay(1000);
    udelay(1000);

    /* I/O mode */
    db->io_mode = ior(db, 0xfe) >> 6;	/* ISR bit7:6 keeps I/O mode */

    /* NIC Type: FASTETHER, HOMERUN, LONGRUN */
    identify_nic(db);

    /* Set PHY */
    db->op_mode = media_mode;
    set_PHY_mode(db);

    /* Init needed register value */
    db->reg0 = DM9000_NCR;
    if ((db->nic_type != FASTETHER_NIC) && (db->op_mode & DM9000_1M_HPNA))
	db->reg0 |= DM9000_EXT_MII;

    /* User passed argument */
    db->reg5 = reg5;
    db->reg8 = reg8;
    db->reg9 = reg9;
    db->rega = rega;

    /* Program operating register */
    iow(db, 0x00, 0x08);
    iow(db, 0x02, 0);		/* TX Polling clear */
    iow(db, 0x2f, 0);		/* Special Mode */
    iow(db, 0x01, 0x2c);	/* clear TX status */
    iow(db, 0xfe, 0x0f);	/* Clear interrupt status */
    iow(db, 0x08, 0x37);
    iow(db, 0x09, 0x38);	/* Flow control: High/Low water */
    iow(db, 0x0a, 0x29);	/* flow control */

    /* Set address filter table */
    dm9000_hash_table(dev);

    /* Activate DM9000 */
    iow(db, 0x05, db->reg5 | 1);	/* RX enable */
    iow(db, 0xff, DM9000_REGFF);	/* Enable TX/RX interrupt mask */

    /* Init Driver variable */
    db->link_failed	= 1;
    db->tx_pkt_cnt	= 0;
    db->queue_pkt_len	= 0;
    dev->trans_start	= 0;

    netif_carrier_on(dev);
    spin_lock_init(&db->lock);
}

#if 0	/* comment by mhfan */
/* Reset dm9000 board due to 32bits mode while excess collision
 * or late collision.
 */
static void dmfe_reset_dm9000(struct net_device *dev)
{
    board_info_t *db = (board_info_t *) dev->priv;

    DMFE_DBUG(0, "dmfe_reset_dm9000()", 0);

    iow(db, 0, 1);		/* NCR (reg_00h) bit[0] RST=1, reset on.
				 * Added by SPenser */
    udelay(1);			/* wait 20us at least for software reset ok */
    iow(db, 0, 0);

    /* software reset 2 times */
    iow(db, DM9000_NCR, 3);
    udelay(20);
    iow(db, DM9000_NCR, 3);
    udelay(20);

    /* Program operating register */
    iow(db, 0x00, db->reg0);
    iow(db, 0x02, 0);		/* TX Polling clear */
    iow(db, 0x08, 0x3f);	/* Less 3Kb, 200us */
    iow(db, 0x09, 0x38);	/* Flow Control : High/Low Water */
    iow(db, 0x0a, 0x29);	/* TX Pause packet */
    iow(db, 0x2f, 0);		/* Special Mode */
    iow(db, 0x01, 0x2c);	/* clear TX status */
    iow(db, 0xfe, 0x0f);	/* Clear interrupt status */

    /* Activate DM9000 */
    iow(db, 0x05, db->reg5 | 1);	/* RX enable */
    iow(db, 0xff, DM9000_REGFF);	/* Enable TX/RX interrupt mask */

    /* Init Driver variable */
    db->link_failed = 1;
    db->tx_pkt_cnt = 0;
    db->queue_pkt_len = 0;
    dev->trans_start = 0;

    netif_carrier_on(dev);
}
#endif	/* comment by mhfan */

/* 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 = (board_info_t *) dev->priv;
    char *data_ptr;
    int i, tmplen;
  //printk("\n\nsun----dmfe_start_xmit\n\n");
    DMFE_DBUG(0, "dmfe_start_xmit", 0);

    if (db->tx_pkt_cnt > 1) return 1;

    netif_stop_queue(dev);


    /* Disable all interrupt */
    iow(db, 0xff, 0x80);

    /* Move data to DM9000 TX RAM */
    data_ptr = (char *) skb->data;
    outb(0xf8, db->ioaddr);

    db->sent_pkt_len = skb->len;

    if (db->io_mode == DM9000_BYTE_MODE) {	    /* Byte mode */
	for (i = 0; i < skb->len; i++)
	    outb((data_ptr[i] & 0xff), db->io_data);
    } else if (db->io_mode == DM9000_WORD_MODE) {   /* Word mode */
	tmplen = (skb->len + 1) / 2;
#if 0 	/* comment by mhfan */
{
    int j = 0;

    for (i = 0; i < tmplen; i++) {
	printk("%04x ", ((u16 *) data_ptr)[i]);
	if (++j == 16) { printk("\n"); j = 0; }
    }
    printk("\n\033[0m");
}
#endif	/* comment by mhfan */
	for (i = 0; i < tmplen; i++)
	    outw(((u16 *) data_ptr)[i], db->io_data);
    } else {					    /* DWord mode */
	tmplen = (skb->len + 3) / 4;
	for (i = 0; i < tmplen; i++)
	    outl(((u32 *) data_ptr)[i], db->io_data);
    }

    /* TX control: First packet immediately send, second packet queue */
    if (db->tx_pkt_cnt == 0) {			/* First Packet */
	db->tx_pkt_cnt++;

	/* Set TX length to DM9000 */
	iow(db, 0xfc, skb->len & 0xff);
	iow(db, 0xfd, (skb->len >> 8) & 0xff);

	/* Issue TX polling command */
	iow(db, 0x2, 0x1);			/* Cleared after TX complete */

	/* saved the time stamp */
	dev->trans_start = jiffies;
    } else {					/* Second packet */
	db->tx_pkt_cnt++;
	db->queue_pkt_len = skb->len;
    }

    /* free this SKB */
    dev_kfree_skb(skb);

    /* Re-enable resource check */
    if (db->tx_pkt_cnt == 1) netif_wake_queue(dev);

    /* Re-enable interrupt */
iow(db, 0xff, 0x83);

    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 = (board_info_t *) dev->priv;
    //printk("\n\nsun----dmfe_stop\n\n");
    DMFE_DBUG(0, "dmfe_stop", 0);

    /* deleted timer */
    del_timer(&db->timer);
    del_timer(&db->mdix_timer);

    netif_stop_queue(dev);

    /* free interrupt */
    free_irq(dev->irq, dev);

    /* RESET devie */
    phy_write(db, 0x00, 0x8000);	/* PHY RESET */
    iow(db, 0x1f, 0x01);	/* Power-Down PHY */
    iow(db, 0xff, 0x80);	/* Disable all interrupt */
    iow(db, 0x05, 0x00);	/* Disable RX */

    //MOD_DEC_USE_COUNT;

#if FALSE /* Dump Statistic counter */
    printk("\nRX FIFO OVERFLOW %lx\n", db->stats.rx_fifo_errors);
    printk("RX CRC %lx\n", db->stats.rx_crc_errors);
    printk("RX LEN Err %lx\n", db->stats.rx_length_errors);
    printk("RX LEN < 64byte %x\n", db->runt_length_counter);
    printk("RX LEN > 1514byte %x\n", db->long_length_counter);
    printk("RESET %x\n", db->reset_counter);
    printk("RESET: TX Timeout %x\n", db->reset_tx_timeout);
    printk("RESET: RX Status Wrong %x\n", db->reset_rx_status);
#endif

    return 0;
}

static void dmfe_tx_done(unsigned long unused)
{
    struct net_device *dev = dmfe_dev;
    board_info_t *db = (board_info_t *) dev->priv;
    int tx_status = ior(db, 0x01);	/* Got TX status */


    DMFE_DBUG(0, "dmfe_tx_done()", 0);


    if (tx_status & 0xc) {		/* One packet sent complete */
	db->tx_pkt_cnt--;
	dev->trans_start = 0;
	db->stats.tx_packets++;

	if (db->tx_pkt_cnt > 0) {	/* Queue packet check & send */
	    /* Set TX length to DM9000 */
	    iow(db, 0xfc, db->queue_pkt_len & 0xff);
	    iow(db, 0xfd, (db->queue_pkt_len >> 8) & 0xff);

	    /* Issue TX polling command */
	    iow(db, 0x2, 0x1);		/* Cleared after TX complete */
	    dev->trans_start = jiffies;	/* saved the time stamp */
	}
	netif_wake_queue(dev);
    }
}

/* DM9102 insterrupt handler.
 * receive the packet to upper layer, free the transmitted packet
 */
static irqreturn_t dmfe_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
    struct net_device *dev = dev_id;
    board_info_t *db;
    int int_status;
    u8 reg_save;

   //printk("\n\nsun----dmfe_interrupt\n\n");
#if 0	/* comment by mhfan */
    DMFE_DBUG(0, "dmfe_interrupt()", 0);

    if (!(*pFIO_FLAG_C & LAN_FIO_PATTERN)) return IRQ_NONE;
    *pFIO_FLAG_C = LAN_FIO_PATTERN;
    asm __volatile__ ("ssync;");
#endif	/* comment by mhfan */
//	printk("net isr --->\n");

/* //---
	if((GEDR2 & 0x40000000) == 0)
		return;

   GEDR2 |= 0x40000000;
   */

    if (!dev) {
	DMFE_DBUG(1, "dmfe_interrupt() without DEVICE arg", 0);
	return IRQ_NONE;
    }

    tintrflag++;

    /* A real interrupt coming */
    db = (board_info_t *) dev->priv;