smc91c92_cs.c

pcmcia驱动源代码,直接可以在linux2.6下使用 !

    This verifies that the chip is some SMC91cXX variant, and returns
    the revision code if successful.  Otherwise, it returns -ENODEV.

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

static int check_sig(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    kio_addr_t ioaddr = dev->base_addr;
    int width;
    u_short s;

    SMC_SELECT_BANK(1);
    if (inw(ioaddr + BANK_SELECT) >> 8 != 0x33) {
	/* Try powering up the chip */
	outw(0, ioaddr + CONTROL);
	mdelay(55);
    }

    /* Try setting bus width */
    width = (link->io.Attributes1 == IO_DATA_PATH_WIDTH_AUTO);
    s = inb(ioaddr + CONFIG);
    if (width)
	s |= CFG_16BIT;
    else
	s &= ~CFG_16BIT;
    outb(s, ioaddr + CONFIG);

    /* Check Base Address Register to make sure bus width is OK */
    s = inw(ioaddr + BASE_ADDR);
    if ((inw(ioaddr + BANK_SELECT) >> 8 == 0x33) &&
	((s >> 8) != (s & 0xff))) {
	SMC_SELECT_BANK(3);
	s = inw(ioaddr + REVISION);
	return (s & 0xff);
    }

    if (width) {
	    modconf_t mod = {
		    .Attributes = CONF_IO_CHANGE_WIDTH,
	    };
	    printk(KERN_INFO "smc91c92_cs: using 8-bit IO window.\n");

	    smc91c92_suspend(link);
	    pcmcia_modify_configuration(link, &mod);
	    smc91c92_resume(link);
	    return check_sig(link);
    }
    return -ENODEV;
}

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

    smc91c92_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    ethernet device available to the system.

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

#define CS_EXIT_TEST(ret, svc, label) \
if (ret != CS_SUCCESS) { cs_error(link, svc, ret); goto label; }

static int smc91c92_config(struct pcmcia_device *link)
{
    struct net_device *dev = link->priv;
    struct smc_private *smc = netdev_priv(dev);
    char *name;
    int i, j, rev;
    kio_addr_t ioaddr;
    u_long mir;

    DEBUG(0, "smc91c92_config(0x%p)\n", link);

    smc->manfid = link->manf_id;
    smc->cardid = link->card_id;

    if ((smc->manfid == MANFID_OSITECH) &&
	(smc->cardid != PRODID_OSITECH_SEVEN)) {
	i = osi_config(link);
    } else if ((smc->manfid == MANFID_MOTOROLA) ||
	       ((smc->manfid == MANFID_MEGAHERTZ) &&
		((smc->cardid == PRODID_MEGAHERTZ_VARIOUS) ||
		 (smc->cardid == PRODID_MEGAHERTZ_EM3288)))) {
	i = mhz_mfc_config(link);
    } else {
	i = smc_config(link);
    }
    CS_EXIT_TEST(i, RequestIO, config_failed);

    i = pcmcia_request_irq(link, &link->irq);
    CS_EXIT_TEST(i, RequestIRQ, config_failed);
    i = pcmcia_request_configuration(link, &link->conf);
    CS_EXIT_TEST(i, RequestConfiguration, config_failed);

    if (smc->manfid == MANFID_MOTOROLA)
	mot_config(link);

    dev->irq = link->irq.AssignedIRQ;

    if ((if_port >= 0) && (if_port <= 2))
	dev->if_port = if_port;
    else
	printk(KERN_NOTICE "smc91c92_cs: invalid if_port requested\n");

    switch (smc->manfid) {
    case MANFID_OSITECH:
    case MANFID_PSION:
	i = osi_setup(link, smc->manfid, smc->cardid); break;
    case MANFID_SMC:
    case MANFID_NEW_MEDIA:
	i = smc_setup(link); break;
    case 0x128: /* For broken Megahertz cards */
    case MANFID_MEGAHERTZ:
	i = mhz_setup(link); break;
    case MANFID_MOTOROLA:
    default: /* get the hw address from EEPROM */
	i = mot_setup(link); break;
    }

    if (i != 0) {
	printk(KERN_NOTICE "smc91c92_cs: Unable to find hardware address.\n");
	goto config_undo;
    }

    smc->duplex = 0;
    smc->rx_ovrn = 0;

    rev = check_sig(link);
    name = "???";
    if (rev > 0)
	switch (rev >> 4) {
	case 3: name = "92"; break;
	case 4: name = ((rev & 15) >= 6) ? "96" : "94"; break;
	case 5: name = "95"; break;
	case 7: name = "100"; break;
	case 8: name = "100-FD"; break;
	case 9: name = "110"; break;
	}

    ioaddr = dev->base_addr;
    if (rev > 0) {
	u_long mcr;
	SMC_SELECT_BANK(0);
	mir = inw(ioaddr + MEMINFO) & 0xff;
	if (mir == 0xff) mir++;
	/* Get scale factor for memory size */
	mcr = ((rev >> 4) > 3) ? inw(ioaddr + MEMCFG) : 0x0200;
	mir *= 128 * (1<<((mcr >> 9) & 7));
	SMC_SELECT_BANK(1);
	smc->cfg = inw(ioaddr + CONFIG) & ~CFG_AUI_SELECT;
	smc->cfg |= CFG_NO_WAIT | CFG_16BIT | CFG_STATIC;
	if (smc->manfid == MANFID_OSITECH)
	    smc->cfg |= CFG_IRQ_SEL_1 | CFG_IRQ_SEL_0;
	if ((rev >> 4) >= 7)
	    smc->cfg |= CFG_MII_SELECT;
    } else
	mir = 0;

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

	for (i = 0; i < 32; i++) {
	    j = mdio_read(dev, i, 1);
	    if ((j != 0) && (j != 0xffff)) break;
	}
	smc->mii_if.phy_id = (i < 32) ? i : -1;

	SMC_SELECT_BANK(0);
    }

    link->dev_node = &smc->node;
    SET_NETDEV_DEV(dev, &handle_to_dev(link));

    if (register_netdev(dev) != 0) {
	printk(KERN_ERR "smc91c92_cs: register_netdev() failed\n");
	link->dev_node = NULL;
	goto config_undo;
    }

    strcpy(smc->node.dev_name, dev->name);

    printk(KERN_INFO "%s: smc91c%s rev %d: io %#3lx, irq %d, "
	   "hw_addr ", dev->name, name, (rev & 0x0f), dev->base_addr,
	   dev->irq);
    for (i = 0; i < 6; i++)
	printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));

    if (rev > 0) {
	if (mir & 0x3ff)
	    printk(KERN_INFO "  %lu byte", mir);
	else
	    printk(KERN_INFO "  %lu kb", mir>>10);
	printk(" buffer, %s xcvr\n", (smc->cfg & CFG_MII_SELECT) ?
	       "MII" : if_names[dev->if_port]);
    }

    if (smc->cfg & CFG_MII_SELECT) {
	if (smc->mii_if.phy_id != -1) {
	    DEBUG(0, "  MII transceiver at index %d, status %x.\n",
		  smc->mii_if.phy_id, j);
	} else {
    	    printk(KERN_NOTICE "  No MII transceivers found!\n");
	}
    }
    return 0;

config_undo:
    unregister_netdev(dev);
config_failed:			/* CS_EXIT_TEST() calls jump to here... */
    smc91c92_release(link);
    return -ENODEV;
} /* smc91c92_config */

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

    After a card is removed, smc91c92_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.

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

static void smc91c92_release(struct pcmcia_device *link)
{
	DEBUG(0, "smc91c92_release(0x%p)\n", link);
	if (link->win) {
		struct net_device *dev = link->priv;
		struct smc_private *smc = netdev_priv(dev);
		iounmap(smc->base);
	}
	pcmcia_disable_device(link);
}

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

    MII interface support for SMC91cXX based cards
======================================================================*/

#define MDIO_SHIFT_CLK		0x04
#define MDIO_DATA_OUT		0x01
#define MDIO_DIR_WRITE		0x08
#define MDIO_DATA_WRITE0	(MDIO_DIR_WRITE)
#define MDIO_DATA_WRITE1	(MDIO_DIR_WRITE | MDIO_DATA_OUT)
#define MDIO_DATA_READ		0x02

static void mdio_sync(kio_addr_t addr)
{
    int bits;
    for (bits = 0; bits < 32; bits++) {
	outb(MDIO_DATA_WRITE1, addr);
	outb(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
    }
}

static int mdio_read(struct net_device *dev, int phy_id, int loc)
{
    kio_addr_t addr = dev->base_addr + MGMT;
    u_int cmd = (0x06<<10)|(phy_id<<5)|loc;
    int i, retval = 0;

    mdio_sync(addr);
    for (i = 13; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb(dat, addr);
	outb(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 19; i > 0; i--) {
	outb(0, addr);
	retval = (retval << 1) | ((inb(addr) & MDIO_DATA_READ) != 0);
	outb(MDIO_SHIFT_CLK, addr);
    }
    return (retval>>1) & 0xffff;
}

static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
{
    kio_addr_t addr = dev->base_addr + MGMT;
    u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
    int i;

    mdio_sync(addr);
    for (i = 31; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb(dat, addr);
	outb(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 1; i >= 0; i--) {
	outb(0, addr);
	outb(MDIO_SHIFT_CLK, addr);
    }
}

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

    The driver core code, most of which should be common with a
    non-PCMCIA implementation.

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

#ifdef PCMCIA_DEBUG
static void smc_dump(struct net_device *dev)
{
    kio_addr_t ioaddr = dev->base_addr;
    u_short i, w, save;
    save = inw(ioaddr + BANK_SELECT);
    for (w = 0; w < 4; w++) {
	SMC_SELECT_BANK(w);
	printk(KERN_DEBUG "bank %d: ", w);
	for (i = 0; i < 14; i += 2)
	    printk(" %04x", inw(ioaddr + i));
	printk("\n");
    }
    outw(save, ioaddr + BANK_SELECT);
}
#endif

static int smc_open(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct pcmcia_device *link = smc->p_dev;

#ifdef PCMCIA_DEBUG
    DEBUG(0, "%s: smc_open(%p), ID/Window %4.4x.\n",
	  dev->name, dev, inw(dev->base_addr + BANK_SELECT));
    if (pc_debug > 1) smc_dump(dev);
#endif

    /* Check that the PCMCIA card is still here. */
    if (!pcmcia_dev_present(link))
	return -ENODEV;
    /* Physical device present signature. */
    if (check_sig(link) < 0) {
	printk("smc91c92_cs: Yikes!  Bad chip signature!\n");
	return -ENODEV;
    }
    link->open++;

    netif_start_queue(dev);
    smc->saved_skb = NULL;
    smc->packets_waiting = 0;

    smc_reset(dev);
    init_timer(&smc->media);
    smc->media.function = &media_check;
    smc->media.data = (u_long) dev;
    smc->media.expires = jiffies + HZ;
    add_timer(&smc->media);

    return 0;
} /* smc_open */

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

static int smc_close(struct net_device *dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct pcmcia_device *link = smc->p_dev;
    kio_addr_t ioaddr = dev->base_addr;

    DEBUG(0, "%s: smc_close(), status %4.4x.\n",
	  dev->name, inw(ioaddr + BANK_SELECT));

    netif_stop_queue(dev);

    /* Shut off all interrupts, and turn off the Tx and Rx sections.
       Don't bother to check for chip present. */
    SMC_SELECT_BANK(2);	/* Nominally paranoia, but do no assume... */
    outw(0, ioaddr + INTERRUPT);
    SMC_SELECT_BANK(0);
    mask_bits(0xff00, ioaddr + RCR);
    mask_bits(0xff00, ioaddr + TCR);

    /* Put the chip into power-down mode. */
    SMC_SELECT_BANK(1);
    outw(CTL_POWERDOWN, ioaddr + CONTROL );

    link->open--;
    del_timer_sync(&smc->media);

    return 0;
} /* smc_close */

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

   Transfer a packet to the hardware and trigger the packet send.
   This may be called at either from either the Tx queue code
   or the interrupt handler.

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

static void smc_hardware_send_packet(struct net_device * dev)
{
    struct smc_private *smc = netdev_priv(dev);
    struct sk_buff *skb = smc->saved_skb;
    kio_addr_t ioaddr = dev->base_addr;
    u_char packet_no;

    if (!skb) {
	printk(KERN_ERR "%s: In XMIT with no packet to send.\n", dev->name);
	return;
    }

    /* There should be a packet slot waiting. */
    packet_no = inw(ioaddr + PNR_ARR) >> 8;
    if (packet_no & 0x80) {
	/* If not, there is a hardware problem!  Likely an ejected card. */
	printk(KERN_WARNING "%s: 91c92 hardware Tx buffer allocation"
	       " failed, status %#2.2x.\n", dev->name, packet_no);
	dev_kfree_skb_irq(skb);
	smc->saved_skb = NULL;
	netif_start_queue(dev);
	return;
    }

    smc->stats.tx_bytes += skb->len;
    /* The card should use the just-allocated buffer. */
    outw(packet_no, ioaddr + PNR_ARR);
    /* point to the beginning of the packet */
    outw(PTR_AUTOINC , ioaddr + POINTER);

    /* Send the packet length (+6 for status, length and ctl byte)
       and the status word (set to zeros). */
    {
	u_char *buf = skb->data;
	u_int length = skb->len; /* The chip will pad to ethernet min. */

	DEBUG(2, "%s: Trying to xmit packet of length %d.\n",
	      dev->name, length);
	
	/* send the packet length: +6 for status word, length, and ctl */
	outw(0, ioaddr + DATA_1);
	outw(length + 6, ioaddr + DATA_1);
	outsw(ioaddr + DATA_1, buf, length >> 1);
	
	/* The odd last byte, if there is one, goes in the control word. */
	outw((length & 1) ? 0x2000 | buf[length-1] : 0, ioaddr + DATA_1);
    }

    /* Enable the Tx interrupts, both Tx (TxErr) and TxEmpty. */
    outw(((IM_TX_INT|IM_TX_EMPTY_INT)<<8) |
	 (inw(ioaddr + INTERRUPT) & 0xff00),
	 ioaddr + INTERRUPT);

    /* The chip does the rest of the work. */
    outw(MC_ENQUEUE , ioaddr + MMU_CMD);

    smc->saved_skb = NULL;