smc91c92_cs.c

该文件是rt_linux

/*====================================================================*/

static struct net_device_stats *smc91c92_get_stats(struct net_device *dev)
{
    struct smc_private *smc = (struct smc_private *)dev->priv;
    /* Nothing to update - the 91c92 is a pretty primative chip. */
    return &smc->stats;
}


/*======================================================================
  
    Calculate values for the hardware multicast filter hash table.
    
======================================================================*/

static void fill_multicast_tbl(int count, struct dev_mc_list *addrs,
			       u_char *multicast_table)
{
    struct dev_mc_list	*mc_addr;
    
    for (mc_addr = addrs;  mc_addr && --count > 0;  mc_addr = mc_addr->next) {
	u_int position = ether_crc(6, mc_addr->dmi_addr);
#ifndef final_version		/* Verify multicast address. */
	if ((mc_addr->dmi_addr[0] & 1) == 0)
	    continue;
#endif
	multicast_table[position >> 29] |= 1 << ((position >> 26) & 7);
    }
}

/*======================================================================
  
    Set the receive mode.
    
    This routine is used by both the protocol level to notify us of
    promiscuous/multicast mode changes, and by the open/reset code to
    initialize the Rx registers.  We always set the multicast list and
    leave the receiver running.
    
======================================================================*/

static void set_rx_mode(struct net_device *dev)
{
    ioaddr_t ioaddr = dev->base_addr;
    struct smc_private *smc = dev->priv;
    u_int multicast_table[ 2 ] = { 0, };
    unsigned long flags;
    u_short rx_cfg_setting;
    
    if (dev->flags & IFF_PROMISC) {
	printk(KERN_NOTICE "%s: setting Rx mode to promiscuous.\n", dev->name);
	rx_cfg_setting = RxStripCRC | RxEnable | RxPromisc | RxAllMulti;
    } else if (dev->flags & IFF_ALLMULTI)
	rx_cfg_setting = RxStripCRC | RxEnable | RxAllMulti;
    else {
	if (dev->mc_count)  {
	    fill_multicast_tbl(dev->mc_count, dev->mc_list,
			       (u_char *)multicast_table);
	}
	rx_cfg_setting = RxStripCRC | RxEnable;
    }
    
    /* Load MC table and Rx setting into the chip without interrupts. */
    spin_lock_irqsave(&smc->lock, flags);
    SMC_SELECT_BANK(3);
    outl(multicast_table[0], ioaddr + MULTICAST0);
    outl(multicast_table[1], ioaddr + MULTICAST4);
    SMC_SELECT_BANK(0);
    outw(rx_cfg_setting, ioaddr + RCR);
    SMC_SELECT_BANK(2);
    spin_unlock_irqrestore(&smc->lock, flags);
 
    return;
}

/*======================================================================

    Senses when a card's config changes. Here, it's coax or TP.
 
======================================================================*/

static int s9k_config(struct net_device *dev, struct ifmap *map)
{
    struct smc_private *smc = dev->priv;
    if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
	if (smc->cfg & CFG_MII_SELECT)
	    return -EOPNOTSUPP;
	else if (map->port > 2)
	    return -EINVAL;
	dev->if_port = map->port;
	printk(KERN_INFO "%s: switched to %s port\n",
	       dev->name, if_names[dev->if_port]);
	smc_reset(dev);
    }
    return 0;
}

/*======================================================================

    Reset the chip, reloading every register that might be corrupted.

======================================================================*/

/*
  Set transceiver type, perhaps to something other than what the user
  specified in dev->if_port.
*/
static void smc_set_xcvr(struct net_device *dev, int if_port)
{
    struct smc_private *smc = (struct smc_private *)dev->priv;
    ioaddr_t ioaddr = dev->base_addr;
    u_short saved_bank;

    saved_bank = inw(ioaddr + BANK_SELECT);
    SMC_SELECT_BANK(1);
    if (if_port == 2) {
	outw(smc->cfg | CFG_AUI_SELECT, ioaddr + CONFIG);
	if ((smc->manfid == MANFID_OSITECH) &&
	    (smc->cardid != PRODID_OSITECH_SEVEN))
	    set_bits(OSI_AUI_PWR, ioaddr - 0x10 + OSITECH_AUI_PWR);
	smc->media_status = ((dev->if_port == 0) ? 0x0001 : 0x0002);
    } else {
	outw(smc->cfg, ioaddr + CONFIG);
	if ((smc->manfid == MANFID_OSITECH) &&
	    (smc->cardid != PRODID_OSITECH_SEVEN))
	    mask_bits(~OSI_AUI_PWR, ioaddr - 0x10 + OSITECH_AUI_PWR);
	smc->media_status = ((dev->if_port == 0) ? 0x0012 : 0x4001);
    }
    SMC_SELECT_BANK(saved_bank);
}

static void smc_reset(struct net_device *dev)
{
    ioaddr_t ioaddr = dev->base_addr;
    struct smc_private *smc = dev->priv;
    int i;

    DEBUG(0, "%s: smc91c92 reset called.\n", dev->name);
    
    /* The first interaction must be a write to bring the chip out
       of sleep mode. */
    SMC_SELECT_BANK(0);
    /* Reset the chip. */
    outw(RCR_SOFTRESET, ioaddr + RCR);
    udelay(10);
    
    /* Clear the transmit and receive configuration registers. */
    outw(RCR_CLEAR, ioaddr + RCR);
    outw(TCR_CLEAR, ioaddr + TCR);
    
    /* Set the Window 1 control, configuration and station addr registers.
       No point in writing the I/O base register ;-> */
    SMC_SELECT_BANK(1);
    /* Automatically release succesfully transmitted packets,
       Accept link errors, counter and Tx error interrupts. */
    outw(CTL_AUTO_RELEASE | CTL_TE_ENABLE | CTL_CR_ENABLE,
	 ioaddr + CONTROL);
    smc_set_xcvr(dev, dev->if_port);
    if ((smc->manfid == MANFID_OSITECH) &&
	(smc->cardid != PRODID_OSITECH_SEVEN))
	outw((dev->if_port == 2 ? OSI_AUI_PWR : 0) |
	     (inw(ioaddr-0x10+OSITECH_AUI_PWR) & 0xff00),
	     ioaddr - 0x10 + OSITECH_AUI_PWR);
    
    /* Fill in the physical address.  The databook is wrong about the order! */
    for (i = 0; i < 6; i += 2)
	outw((dev->dev_addr[i+1]<<8)+dev->dev_addr[i],
	     ioaddr + ADDR0 + i);
    
    /* Reset the MMU */
    SMC_SELECT_BANK(2);
    outw(MC_RESET, ioaddr + MMU_CMD);
    outw(0, ioaddr + INTERRUPT);
    
    /* Re-enable the chip. */
    SMC_SELECT_BANK(0);
    outw(((smc->cfg & CFG_MII_SELECT) ? 0 : TCR_MONCSN) |
	 TCR_ENABLE | TCR_PAD_EN, ioaddr + TCR);
    set_rx_mode(dev);

    if (smc->cfg & CFG_MII_SELECT) {
	SMC_SELECT_BANK(3);

	/* Reset MII */
	smc_mdio_write(dev, smc->mii_if.phy_id, 0, 0x8000);

	/* Restart MII autonegotiation */
	smc_mdio_write(dev, smc->mii_if.phy_id, 0, 0x0000);
	smc_mdio_write(dev, smc->mii_if.phy_id, 0, 0x1200);
    }

    /* Enable interrupts. */
    SMC_SELECT_BANK(2);
    outw((IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT) << 8,
	 ioaddr + INTERRUPT);
}

/*======================================================================

    Media selection timer routine
    
======================================================================*/

static void media_check(u_long arg)
{
    struct smc_private *smc = (struct smc_private *)(arg);
    struct net_device *dev = &smc->dev;
    ioaddr_t ioaddr = dev->base_addr;
    u_short i, media, saved_bank;
    u_short link;

    saved_bank = inw(ioaddr + BANK_SELECT);

    if (!netif_device_present(dev))
	goto reschedule;

    SMC_SELECT_BANK(2);
    i = inw(ioaddr + INTERRUPT);
    SMC_SELECT_BANK(0);
    media = inw(ioaddr + EPH) & EPH_LINK_OK;
    SMC_SELECT_BANK(1);
    media |= (inw(ioaddr + CONFIG) & CFG_AUI_SELECT) ? 2 : 1;
    
    /* Check for pending interrupt with watchdog flag set: with
       this, we can limp along even if the interrupt is blocked */
    if (smc->watchdog++ && ((i>>8) & i)) {
	if (!smc->fast_poll)
	    printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
	smc_interrupt(dev->irq, smc, NULL);
	smc->fast_poll = HZ;
    }
    if (smc->fast_poll) {
	smc->fast_poll--;
	smc->media.expires = jiffies + 1;
	add_timer(&smc->media);
	SMC_SELECT_BANK(saved_bank);
	return;
    }

    if (smc->cfg & CFG_MII_SELECT) {
	if (smc->mii_if.phy_id < 0)
	    goto reschedule;

	SMC_SELECT_BANK(3);
	link = smc_mdio_read(dev, smc->mii_if.phy_id, 1);
	if (!link || (link == 0xffff)) {
  	    printk(KERN_INFO "%s: MII is missing!\n", dev->name);
	    smc->mii_if.phy_id = -1;
	    goto reschedule;
	}

	link &= 0x0004;
	if (link != smc->link_status) {
	    u_short p = smc_mdio_read(dev, smc->mii_if.phy_id, 5);
	    printk(KERN_INFO "%s: %s link beat\n", dev->name,
		(link) ? "found" : "lost");
	    if (link) {
	        printk(KERN_INFO "%s: autonegotiation complete: "
	   	    "%sbaseT-%cD selected\n", dev->name,
		    ((p & 0x0180) ? "100" : "10"),
		    (((p & 0x0100) || ((p & 0x1c0) == 0x40)) ? 'F' : 'H'));
	    }
	    smc->link_status = link;
	}
    }

    if (smc->cfg & CFG_MII_SELECT)
	goto reschedule;

    /* Ignore collisions unless we've had no rx's recently */
    if (jiffies - dev->last_rx > HZ) {
	if (smc->tx_err || (smc->media_status & EPH_16COL))
	    media |= EPH_16COL;
    }
    smc->tx_err = 0;

    if (media != smc->media_status) {
	if ((media & smc->media_status & 1) &&
	    ((smc->media_status ^ media) & EPH_LINK_OK))
	    printk(KERN_INFO "%s: %s link beat\n", dev->name,
		   (smc->media_status & EPH_LINK_OK ? "lost" : "found"));
	else if ((media & smc->media_status & 2) &&
		 ((smc->media_status ^ media) & EPH_16COL))
	    printk(KERN_INFO "%s: coax cable %s\n", dev->name,
		   (media & EPH_16COL ? "problem" : "ok"));
	if (dev->if_port == 0) {
	    if (media & 1) {
		if (media & EPH_LINK_OK)
		    printk(KERN_INFO "%s: flipped to 10baseT\n",
			   dev->name);
		else
		    smc_set_xcvr(dev, 2);
	    } else {
		if (media & EPH_16COL)
		    smc_set_xcvr(dev, 1);
		else
		    printk(KERN_INFO "%s: flipped to 10base2\n",
			   dev->name);
	    }
	}
	smc->media_status = media;
    }
    
reschedule:
    smc->media.expires = jiffies + HZ;
    add_timer(&smc->media);
    SMC_SELECT_BANK(saved_bank);
}

static int smc_link_ok(struct net_device *dev)
{
    ioaddr_t ioaddr = dev->base_addr;
    struct smc_private *smc = dev->priv;

    if (smc->cfg & CFG_MII_SELECT) {
	return mii_link_ok(&smc->mii_if);
    } else {
        SMC_SELECT_BANK(0);
	return inw(ioaddr + EPH) & EPH_LINK_OK;
    }
}

static int smc_netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
{
    u16 tmp;
    ioaddr_t ioaddr = dev->base_addr;

    ecmd->supported = (SUPPORTED_TP | SUPPORTED_AUI |
	SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full);
		
    SMC_SELECT_BANK(1);
    tmp = inw(ioaddr + CONFIG);
    ecmd->port = (tmp & CFG_AUI_SELECT) ? PORT_AUI : PORT_TP;
    ecmd->transceiver = XCVR_INTERNAL;
    ecmd->speed = SPEED_10;
    ecmd->phy_address = ioaddr + MGMT;

    SMC_SELECT_BANK(0);
    tmp = inw(ioaddr + TCR);
    ecmd->duplex = (tmp & TCR_FDUPLX) ? DUPLEX_FULL : DUPLEX_HALF;

    return 0;
}

static int smc_netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
{
    u16 tmp;
    ioaddr_t ioaddr = dev->base_addr;

    if (ecmd->speed != SPEED_10)
    	return -EINVAL;
    if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
    	return -EINVAL;
    if (ecmd->port != PORT_TP && ecmd->port != PORT_AUI)
	return -EINVAL;
    if (ecmd->transceiver != XCVR_INTERNAL)
    	return -EINVAL;

    if (ecmd->port == PORT_AUI)
	smc_set_xcvr(dev, 1);
    else
	smc_set_xcvr(dev, 0);

    SMC_SELECT_BANK(0);
    tmp = inw(ioaddr + TCR);
    if (ecmd->duplex == DUPLEX_FULL)
	tmp |= TCR_FDUPLX;
    else
	tmp &= ~TCR_FDUPLX;
    outw(ioaddr + TCR, tmp);
	
    return 0;
}

static int smc_ethtool_ioctl (struct net_device *dev, void *useraddr)
{
    u32 ethcmd;
    struct smc_private *smc = dev->priv;

    if (get_user(ethcmd, (u32 *)useraddr))
	return -EFAULT;

    switch (ethcmd) {

    case ETHTOOL_GDRVINFO: {
	struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
	strcpy(info.driver, DRV_NAME);
	strcpy(info.version, DRV_VERSION);
	if (copy_to_user(useraddr, &info, sizeof(info)))
	    return -EFAULT;
	return 0;
    }

    /* get settings */
    case ETHTOOL_GSET: {
	int ret;
	struct ethtool_cmd ecmd = { ETHTOOL_GSET };
	spin_lock_irq(&smc->lock);
	if (smc->cfg & CFG_MII_SELECT)
	    ret = mii_ethtool_gset(&smc->mii_if, &ecmd);
	else
	    ret = smc_netdev_get_ecmd(dev, &ecmd);
	spin_unlock_irq(&smc->lock);
	if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
	    return -EFAULT;
	return ret;
    }

    /* set settings */
    case ETHTOOL_SSET: {
	int ret;
	struct ethtool_cmd ecmd;
	if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
	    return -EFAULT;
	spin_lock_irq(&smc->lock);
	if (smc->cfg & CFG_MII_SELECT)
	    ret = mii_ethtool_sset(&smc->mii_if, &ecmd);    
	else
	    ret = smc_netdev_set_ecmd(dev, &ecmd);
	spin_unlock_irq(&smc->lock);
	return ret;
    }

    /* get link status */
    case ETHTOOL_GLINK: {
	struct ethtool_value edata = { ETHTOOL_GLINK };
	spin_lock_irq(&smc->lock);
	edata.data = smc_link_ok(dev);
	spin_unlock_irq(&smc->lock);
	if (copy_to_user(useraddr, &edata, sizeof(edata)))
	    return -EFAULT;
	return 0;
    }

#ifdef PCMCIA_DEBUG
    /