axnet_cs.c

linux-2.6.15.6

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

    After a card is removed, axnet_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 axnet_release(dev_link_t *link)
{
    DEBUG(0, "axnet_release(0x%p)\n", link);

    pcmcia_release_configuration(link->handle);
    pcmcia_release_io(link->handle, &link->io);
    pcmcia_release_irq(link->handle, &link->irq);

    link->state &= ~DEV_CONFIG;
}

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

    The card status event handler.  Mostly, this schedules other
    stuff to run after an event is received.  A CARD_REMOVAL event
    also sets some flags to discourage the net drivers from trying
    to talk to the card any more.

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

static int axnet_event(event_t event, int priority,
		       event_callback_args_t *args)
{
    dev_link_t *link = args->client_data;
    struct net_device *dev = link->priv;

    DEBUG(2, "axnet_event(0x%06x)\n", event);

    switch (event) {
    case CS_EVENT_CARD_REMOVAL:
	link->state &= ~DEV_PRESENT;
	if (link->state & DEV_CONFIG)
	    netif_device_detach(dev);
	break;
    case CS_EVENT_CARD_INSERTION:
	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
	axnet_config(link);
	break;
    case CS_EVENT_PM_SUSPEND:
	link->state |= DEV_SUSPEND;
	/* Fall through... */
    case CS_EVENT_RESET_PHYSICAL:
	if (link->state & DEV_CONFIG) {
	    if (link->open)
		netif_device_detach(dev);
	    pcmcia_release_configuration(link->handle);
	}
	break;
    case CS_EVENT_PM_RESUME:
	link->state &= ~DEV_SUSPEND;
	/* Fall through... */
    case CS_EVENT_CARD_RESET:
	if (link->state & DEV_CONFIG) {
	    pcmcia_request_configuration(link->handle, &link->conf);
	    if (link->open) {
		axnet_reset_8390(dev);
		AX88190_init(dev, 1);
		netif_device_attach(dev);
	    }
	}
	break;
    }
    return 0;
} /* axnet_event */

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

    MII interface support

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

#define MDIO_SHIFT_CLK		0x01
#define MDIO_DATA_WRITE0	0x00
#define MDIO_DATA_WRITE1	0x08
#define MDIO_DATA_READ		0x04
#define MDIO_MASK		0x0f
#define MDIO_ENB_IN		0x02

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

static int mdio_read(kio_addr_t addr, int phy_id, int loc)
{
    u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
    int i, retval = 0;

    mdio_sync(addr);
    for (i = 14; i >= 0; i--) {
	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
	outb_p(dat, addr);
	outb_p(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 19; i > 0; i--) {
	outb_p(MDIO_ENB_IN, addr);
	retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
    }
    return (retval>>1) & 0xffff;
}

static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value)
{
    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_p(dat, addr);
	outb_p(dat | MDIO_SHIFT_CLK, addr);
    }
    for (i = 1; i >= 0; i--) {
	outb_p(MDIO_ENB_IN, addr);
	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
    }
}

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

static int axnet_open(struct net_device *dev)
{
    axnet_dev_t *info = PRIV(dev);
    dev_link_t *link = &info->link;
    
    DEBUG(2, "axnet_open('%s')\n", dev->name);

    if (!DEV_OK(link))
	return -ENODEV;

    link->open++;

    request_irq(dev->irq, ei_irq_wrapper, SA_SHIRQ, dev_info, dev);

    info->link_status = 0x00;
    init_timer(&info->watchdog);
    info->watchdog.function = &ei_watchdog;
    info->watchdog.data = (u_long)dev;
    info->watchdog.expires = jiffies + HZ;
    add_timer(&info->watchdog);

    return ax_open(dev);
} /* axnet_open */

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

static int axnet_close(struct net_device *dev)
{
    axnet_dev_t *info = PRIV(dev);
    dev_link_t *link = &info->link;

    DEBUG(2, "axnet_close('%s')\n", dev->name);

    ax_close(dev);
    free_irq(dev->irq, dev);
    
    link->open--;
    netif_stop_queue(dev);
    del_timer_sync(&info->watchdog);

    return 0;
} /* axnet_close */

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

    Hard reset the card.  This used to pause for the same period that
    a 8390 reset command required, but that shouldn't be necessary.

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

static void axnet_reset_8390(struct net_device *dev)
{
    kio_addr_t nic_base = dev->base_addr;
    int i;

    ei_status.txing = ei_status.dmaing = 0;

    outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);

    outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);

    for (i = 0; i < 100; i++) {
	if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
	    break;
	udelay(100);
    }
    outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
    
    if (i == 100)
	printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n",
	       dev->name);
    
} /* axnet_reset_8390 */

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

static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs)
{
    struct net_device *dev = dev_id;
    PRIV(dev)->stale = 0;
    return ax_interrupt(irq, dev_id, regs);
}

static void ei_watchdog(u_long arg)
{
    struct net_device *dev = (struct net_device *)(arg);
    axnet_dev_t *info = PRIV(dev);
    kio_addr_t nic_base = dev->base_addr;
    kio_addr_t mii_addr = nic_base + AXNET_MII_EEP;
    u_short link;

    if (!netif_device_present(dev)) goto reschedule;

    /* Check for pending interrupt with expired latency timer: with
       this, we can limp along even if the interrupt is blocked */
    if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
	if (!info->fast_poll)
	    printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
	ei_irq_wrapper(dev->irq, dev, NULL);
	info->fast_poll = HZ;
    }
    if (info->fast_poll) {
	info->fast_poll--;
	info->watchdog.expires = jiffies + 1;
	add_timer(&info->watchdog);
	return;
    }

    if (info->phy_id < 0)
	goto reschedule;
    link = mdio_read(mii_addr, info->phy_id, 1);
    if (!link || (link == 0xffff)) {
	printk(KERN_INFO "%s: MII is missing!\n", dev->name);
	info->phy_id = -1;
	goto reschedule;
    }

    link &= 0x0004;
    if (link != info->link_status) {
	u_short p = mdio_read(mii_addr, info->phy_id, 5);
	printk(KERN_INFO "%s: %s link beat\n", dev->name,
	       (link) ? "found" : "lost");
	if (link) {
	    info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
	    if (p)
		printk(KERN_INFO "%s: autonegotiation complete: "
		       "%sbaseT-%cD selected\n", dev->name,
		       ((p & 0x0180) ? "100" : "10"),
		       ((p & 0x0140) ? 'F' : 'H'));
	    else
		printk(KERN_INFO "%s: link partner did not autonegotiate\n",
		       dev->name);
	    AX88190_init(dev, 1);
	}
	info->link_status = link;
    }

reschedule:
    info->watchdog.expires = jiffies + HZ;
    add_timer(&info->watchdog);
}

static void netdev_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "axnet_cs");
}

static struct ethtool_ops netdev_ethtool_ops = {
	.get_drvinfo		= netdev_get_drvinfo,
};

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

static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
    axnet_dev_t *info = PRIV(dev);
    u16 *data = (u16 *)&rq->ifr_ifru;
    kio_addr_t mii_addr = dev->base_addr + AXNET_MII_EEP;
    switch (cmd) {
    case SIOCGMIIPHY:
	data[0] = info->phy_id;
    case SIOCGMIIREG:		/* Read MII PHY register. */
	data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
	return 0;
    case SIOCSMIIREG:		/* Write MII PHY register. */
	if (!capable(CAP_NET_ADMIN))
	    return -EPERM;
	mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
	return 0;
    }
    return -EOPNOTSUPP;
}

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

static void get_8390_hdr(struct net_device *dev,
			 struct e8390_pkt_hdr *hdr,
			 int ring_page)
{
    kio_addr_t nic_base = dev->base_addr;

    outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
    outb_p(ring_page, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);

    insw(nic_base + AXNET_DATAPORT, hdr,
	    sizeof(struct e8390_pkt_hdr)>>1);
    /* Fix for big endian systems */
    hdr->count = le16_to_cpu(hdr->count);

}

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

static void block_input(struct net_device *dev, int count,
			struct sk_buff *skb, int ring_offset)
{
    kio_addr_t nic_base = dev->base_addr;
    int xfer_count = count;
    char *buf = skb->data;

#ifdef PCMCIA_DEBUG
    if ((ei_debug > 4) && (count != 4))
	printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4);
#endif
    outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
    outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);

    insw(nic_base + AXNET_DATAPORT,buf,count>>1);
    if (count & 0x01)
	buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;

}

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

static void block_output(struct net_device *dev, int count,
			 const u_char *buf, const int start_page)
{
    kio_addr_t nic_base = dev->base_addr;

#ifdef PCMCIA_DEBUG
    if (ei_debug > 4)
	printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count);
#endif

    /* Round the count up for word writes.  Do we need to do this?
       What effect will an odd byte count have on the 8390?
       I should check someday. */
    if (count & 0x01)
	count++;

    outb_p(0x00, nic_base + EN0_RSARLO);
    outb_p(start_page, nic_base + EN0_RSARHI);
    outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
    outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
}

static struct pcmcia_device_id axnet_ids[] = {
	PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
	PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
	PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
	PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
	PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
	PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
	PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
	PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
	PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
	PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
	PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
	PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
	PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6,  0xab9be5ef),
	/* this is not specific enough */
	/* PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), */
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, axnet_ids);

static struct pcmcia_driver axnet_cs_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "axnet_cs",
	},
	.attach		= axnet_attach,
	.event		= axnet_event,
	.detach		= axnet_detach,
	.id_table       = axnet_ids,
};

static int __init init_axnet_cs(void)
{
	return pcmcia_register_driver(&axnet_cs_driver);
}

static void __exit exit_axnet_cs(void)
{
	pcmcia_unregister_driver(&axnet_cs_driver);
	BUG_ON(dev_list != NULL);
}

module_init(init_axnet_cs);
module_exit(exit_axnet_cs);

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

/* 8390.c: A general NS8390 ethernet driver core for linux. */
/*
	Written 1992-94 by Donald Becker.
  
	Copyright 1993 United States Government as represented by the
	Director, National Security Agency.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	The author may be reached as [e-mail], or C/O
	Scyld Computing Corporation
	410 Severn Ave., Suite 210
	Annapolis MD 21403

  This is the chip-specific code for many 8390-based ethernet adaptors.
  This is not a complete driver, it must be combined with board-specific
  code such as ne.c, wd.c, 3c503.c, etc.

  Seeing how at least eight drivers use this code, (not counting the
  PCMCIA ones either) it is easy to break some card by what seems like
  a simple innocent change. Please contact me or Donald if you think
  you have found something that needs changing. -- PG

  Changelog:

  Paul Gortmaker	: remove set_bit lock, other cleanups.
  Paul Gortmaker	: add ei_get_8390_hdr() so we can pass skb's to 
			  ei_block_input() for eth_io_copy_and_sum().
  Paul Gortmaker	: exchange static int ei_pingpong for a #define,
			  also add better Tx error handling.
  Paul Gortmaker	: rewrite Rx overrun handling as per NS specs.
  Alexey Kuznetsov	: use the 8390's six bit hash multicast filter.
  Paul Gortmaker	: tweak ANK's above multicast changes a bit.
  Paul Gortmaker	: update packet statistics for v2.1.x
  Alan Cox		: support arbitary stupid port mappings on the
  			  68K Macintosh. Support >16bit I/O spaces
  Paul Gortmaker	: add kmod support for auto-loading of the 8390
			  module by all drivers that require it.
  Alan Cox		: Spinlocking work, added 'BUG_83C690'
  Paul Gortmaker	: Separate out Tx timeout code from Tx path.

  Sources:
  The National Semiconductor LAN Databook, and the 3Com 3c503 databook.