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/drivers/net/pcmcia/axnet_cs.c

https://bitbucket.org/slukk/jb-tsm-kernel-4.2
C | 1725 lines | 1105 code | 255 blank | 365 comment | 204 complexity | 89cc31b6910001547dec1a62d3eb03ff MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0

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   1/*======================================================================
   2
   3    A PCMCIA ethernet driver for Asix AX88190-based cards
   4
   5    The Asix AX88190 is a NS8390-derived chipset with a few nasty
   6    idiosyncracies that make it very inconvenient to support with a
   7    standard 8390 driver.  This driver is based on pcnet_cs, with the
   8    tweaked 8390 code grafted on the end.  Much of what I did was to
   9    clean up and update a similar driver supplied by Asix, which was
  10    adapted by William Lee, william@asix.com.tw.
  11
  12    Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
  13
  14    axnet_cs.c 1.28 2002/06/29 06:27:37
  15
  16    The network driver code is based on Donald Becker's NE2000 code:
  17
  18    Written 1992,1993 by Donald Becker.
  19    Copyright 1993 United States Government as represented by the
  20    Director, National Security Agency.  This software may be used and
  21    distributed according to the terms of the GNU General Public License,
  22    incorporated herein by reference.
  23    Donald Becker may be reached at becker@scyld.com
  24
  25======================================================================*/
  26
  27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29#include <linux/kernel.h>
  30#include <linux/module.h>
  31#include <linux/init.h>
  32#include <linux/ptrace.h>
  33#include <linux/string.h>
  34#include <linux/timer.h>
  35#include <linux/delay.h>
  36#include <linux/spinlock.h>
  37#include <linux/netdevice.h>
  38#include <linux/etherdevice.h>
  39#include <linux/crc32.h>
  40#include <linux/mii.h>
  41#include "../8390.h"
  42
  43#include <pcmcia/cistpl.h>
  44#include <pcmcia/ciscode.h>
  45#include <pcmcia/ds.h>
  46#include <pcmcia/cisreg.h>
  47
  48#include <asm/io.h>
  49#include <asm/system.h>
  50#include <asm/byteorder.h>
  51#include <asm/uaccess.h>
  52
  53#define AXNET_CMD	0x00
  54#define AXNET_DATAPORT	0x10	/* NatSemi-defined port window offset. */
  55#define AXNET_RESET	0x1f	/* Issue a read to reset, a write to clear. */
  56#define AXNET_MII_EEP	0x14	/* Offset of MII access port */
  57#define AXNET_TEST	0x15	/* Offset of TEST Register port */
  58#define AXNET_GPIO	0x17	/* Offset of General Purpose Register Port */
  59
  60#define AXNET_START_PG	0x40	/* First page of TX buffer */
  61#define AXNET_STOP_PG	0x80	/* Last page +1 of RX ring */
  62
  63#define AXNET_RDC_TIMEOUT 0x02	/* Max wait in jiffies for Tx RDC */
  64
  65#define IS_AX88190	0x0001
  66#define IS_AX88790	0x0002
  67
  68/*====================================================================*/
  69
  70/* Module parameters */
  71
  72MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  73MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
  74MODULE_LICENSE("GPL");
  75
  76
  77/*====================================================================*/
  78
  79static int axnet_config(struct pcmcia_device *link);
  80static void axnet_release(struct pcmcia_device *link);
  81static int axnet_open(struct net_device *dev);
  82static int axnet_close(struct net_device *dev);
  83static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
  84static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
  85					  struct net_device *dev);
  86static struct net_device_stats *get_stats(struct net_device *dev);
  87static void set_multicast_list(struct net_device *dev);
  88static void axnet_tx_timeout(struct net_device *dev);
  89static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
  90static void ei_watchdog(u_long arg);
  91static void axnet_reset_8390(struct net_device *dev);
  92
  93static int mdio_read(unsigned int addr, int phy_id, int loc);
  94static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
  95
  96static void get_8390_hdr(struct net_device *,
  97			 struct e8390_pkt_hdr *, int);
  98static void block_input(struct net_device *dev, int count,
  99			struct sk_buff *skb, int ring_offset);
 100static void block_output(struct net_device *dev, int count,
 101			 const u_char *buf, const int start_page);
 102
 103static void axnet_detach(struct pcmcia_device *p_dev);
 104
 105static void AX88190_init(struct net_device *dev, int startp);
 106static int ax_open(struct net_device *dev);
 107static int ax_close(struct net_device *dev);
 108static irqreturn_t ax_interrupt(int irq, void *dev_id);
 109
 110/*====================================================================*/
 111
 112typedef struct axnet_dev_t {
 113	struct pcmcia_device	*p_dev;
 114	caddr_t	base;
 115	struct timer_list	watchdog;
 116	int	stale, fast_poll;
 117	u_short	link_status;
 118	u_char	duplex_flag;
 119	int	phy_id;
 120	int	flags;
 121	int	active_low;
 122} axnet_dev_t;
 123
 124static inline axnet_dev_t *PRIV(struct net_device *dev)
 125{
 126	void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
 127	return p;
 128}
 129
 130static const struct net_device_ops axnet_netdev_ops = {
 131	.ndo_open 		= axnet_open,
 132	.ndo_stop		= axnet_close,
 133	.ndo_do_ioctl		= axnet_ioctl,
 134	.ndo_start_xmit		= axnet_start_xmit,
 135	.ndo_tx_timeout		= axnet_tx_timeout,
 136	.ndo_get_stats		= get_stats,
 137	.ndo_set_multicast_list = set_multicast_list,
 138	.ndo_change_mtu		= eth_change_mtu,
 139	.ndo_set_mac_address 	= eth_mac_addr,
 140	.ndo_validate_addr	= eth_validate_addr,
 141};
 142
 143static int axnet_probe(struct pcmcia_device *link)
 144{
 145    axnet_dev_t *info;
 146    struct net_device *dev;
 147    struct ei_device *ei_local;
 148
 149    dev_dbg(&link->dev, "axnet_attach()\n");
 150
 151    dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
 152    if (!dev)
 153	return -ENOMEM;
 154
 155    ei_local = netdev_priv(dev);
 156    spin_lock_init(&ei_local->page_lock);
 157
 158    info = PRIV(dev);
 159    info->p_dev = link;
 160    link->priv = dev;
 161    link->config_flags |= CONF_ENABLE_IRQ;
 162
 163    dev->netdev_ops = &axnet_netdev_ops;
 164
 165    dev->watchdog_timeo = TX_TIMEOUT;
 166
 167    return axnet_config(link);
 168} /* axnet_attach */
 169
 170static void axnet_detach(struct pcmcia_device *link)
 171{
 172    struct net_device *dev = link->priv;
 173
 174    dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
 175
 176    unregister_netdev(dev);
 177
 178    axnet_release(link);
 179
 180    free_netdev(dev);
 181} /* axnet_detach */
 182
 183/*======================================================================
 184
 185    This probes for a card's hardware address by reading the PROM.
 186
 187======================================================================*/
 188
 189static int get_prom(struct pcmcia_device *link)
 190{
 191    struct net_device *dev = link->priv;
 192    unsigned int ioaddr = dev->base_addr;
 193    int i, j;
 194
 195    /* This is based on drivers/net/ne.c */
 196    struct {
 197	u_char value, offset;
 198    } program_seq[] = {
 199	{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
 200	{0x01,	EN0_DCFG},	/* Set word-wide access. */
 201	{0x00,	EN0_RCNTLO},	/* Clear the count regs. */
 202	{0x00,	EN0_RCNTHI},
 203	{0x00,	EN0_IMR},	/* Mask completion irq. */
 204	{0xFF,	EN0_ISR},
 205	{E8390_RXOFF|0x40, EN0_RXCR},	/* 0x60  Set to monitor */
 206	{E8390_TXOFF, EN0_TXCR},	/* 0x02  and loopback mode. */
 207	{0x10,	EN0_RCNTLO},
 208	{0x00,	EN0_RCNTHI},
 209	{0x00,	EN0_RSARLO},	/* DMA starting at 0x0400. */
 210	{0x04,	EN0_RSARHI},
 211	{E8390_RREAD+E8390_START, E8390_CMD},
 212    };
 213
 214    /* Not much of a test, but the alternatives are messy */
 215    if (link->config_base != 0x03c0)
 216	return 0;
 217
 218    axnet_reset_8390(dev);
 219    mdelay(10);
 220
 221    for (i = 0; i < ARRAY_SIZE(program_seq); i++)
 222	outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
 223
 224    for (i = 0; i < 6; i += 2) {
 225	j = inw(ioaddr + AXNET_DATAPORT);
 226	dev->dev_addr[i] = j & 0xff;
 227	dev->dev_addr[i+1] = j >> 8;
 228    }
 229    return 1;
 230} /* get_prom */
 231
 232static int try_io_port(struct pcmcia_device *link)
 233{
 234    int j, ret;
 235    link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 236    link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
 237    if (link->resource[0]->end == 32) {
 238	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
 239	/* for master/slave multifunction cards */
 240	if (link->resource[1]->end > 0)
 241	    link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
 242    } else {
 243	/* This should be two 16-port windows */
 244	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 245	link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
 246    }
 247    if (link->resource[0]->start == 0) {
 248	for (j = 0; j < 0x400; j += 0x20) {
 249	    link->resource[0]->start = j ^ 0x300;
 250	    link->resource[1]->start = (j ^ 0x300) + 0x10;
 251	    link->io_lines = 16;
 252	    ret = pcmcia_request_io(link);
 253	    if (ret == 0)
 254		    return ret;
 255	}
 256	return ret;
 257    } else {
 258	return pcmcia_request_io(link);
 259    }
 260}
 261
 262static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
 263{
 264	if (p_dev->config_index == 0)
 265		return -EINVAL;
 266
 267	p_dev->config_index = 0x05;
 268	if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
 269		return -ENODEV;
 270
 271	return try_io_port(p_dev);
 272}
 273
 274static int axnet_config(struct pcmcia_device *link)
 275{
 276    struct net_device *dev = link->priv;
 277    axnet_dev_t *info = PRIV(dev);
 278    int i, j, j2, ret;
 279
 280    dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
 281
 282    /* don't trust the CIS on this; Linksys got it wrong */
 283    link->config_regs = 0x63;
 284    link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
 285    ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
 286    if (ret != 0)
 287	goto failed;
 288
 289    if (!link->irq)
 290	    goto failed;
 291
 292    if (resource_size(link->resource[1]) == 8)
 293	link->config_flags |= CONF_ENABLE_SPKR;
 294    
 295    ret = pcmcia_enable_device(link);
 296    if (ret)
 297	    goto failed;
 298
 299    dev->irq = link->irq;
 300    dev->base_addr = link->resource[0]->start;
 301
 302    if (!get_prom(link)) {
 303	pr_notice("this is not an AX88190 card!\n");
 304	pr_notice("use pcnet_cs instead.\n");
 305	goto failed;
 306    }
 307
 308    ei_status.name = "AX88190";
 309    ei_status.word16 = 1;
 310    ei_status.tx_start_page = AXNET_START_PG;
 311    ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
 312    ei_status.stop_page = AXNET_STOP_PG;
 313    ei_status.reset_8390 = axnet_reset_8390;
 314    ei_status.get_8390_hdr = get_8390_hdr;
 315    ei_status.block_input = block_input;
 316    ei_status.block_output = block_output;
 317
 318    if (inb(dev->base_addr + AXNET_TEST) != 0)
 319	info->flags |= IS_AX88790;
 320    else
 321	info->flags |= IS_AX88190;
 322
 323    if (info->flags & IS_AX88790)
 324	outb(0x10, dev->base_addr + AXNET_GPIO);  /* select Internal PHY */
 325
 326    info->active_low = 0;
 327
 328    for (i = 0; i < 32; i++) {
 329	j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
 330	j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
 331	if (j == j2) continue;
 332	if ((j != 0) && (j != 0xffff)) break;
 333    }
 334
 335    if (i == 32) {
 336	/* Maybe PHY is in power down mode. (PPD_SET = 1)
 337	   Bit 2 of CCSR is active low. */
 338	pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
 339	for (i = 0; i < 32; i++) {
 340	    j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
 341	    j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
 342	    if (j == j2) continue;
 343	    if ((j != 0) && (j != 0xffff)) {
 344		info->active_low = 1;
 345		break;
 346	    }
 347	}
 348    }
 349
 350    info->phy_id = (i < 32) ? i : -1;
 351    SET_NETDEV_DEV(dev, &link->dev);
 352
 353    if (register_netdev(dev) != 0) {
 354	pr_notice("register_netdev() failed\n");
 355	goto failed;
 356    }
 357
 358    netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
 359		((info->flags & IS_AX88790) ? 7 : 1),
 360		dev->base_addr, dev->irq, dev->dev_addr);
 361    if (info->phy_id != -1) {
 362	netdev_dbg(dev, "  MII transceiver at index %d, status %x\n",
 363		   info->phy_id, j);
 364    } else {
 365	netdev_notice(dev, "  No MII transceivers found!\n");
 366    }
 367    return 0;
 368
 369failed:
 370    axnet_release(link);
 371    return -ENODEV;
 372} /* axnet_config */
 373
 374static void axnet_release(struct pcmcia_device *link)
 375{
 376	pcmcia_disable_device(link);
 377}
 378
 379static int axnet_suspend(struct pcmcia_device *link)
 380{
 381	struct net_device *dev = link->priv;
 382
 383	if (link->open)
 384		netif_device_detach(dev);
 385
 386	return 0;
 387}
 388
 389static int axnet_resume(struct pcmcia_device *link)
 390{
 391	struct net_device *dev = link->priv;
 392	axnet_dev_t *info = PRIV(dev);
 393
 394	if (link->open) {
 395		if (info->active_low == 1)
 396			pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
 397
 398		axnet_reset_8390(dev);
 399		AX88190_init(dev, 1);
 400		netif_device_attach(dev);
 401	}
 402
 403	return 0;
 404}
 405
 406
 407/*======================================================================
 408
 409    MII interface support
 410
 411======================================================================*/
 412
 413#define MDIO_SHIFT_CLK		0x01
 414#define MDIO_DATA_WRITE0	0x00
 415#define MDIO_DATA_WRITE1	0x08
 416#define MDIO_DATA_READ		0x04
 417#define MDIO_MASK		0x0f
 418#define MDIO_ENB_IN		0x02
 419
 420static void mdio_sync(unsigned int addr)
 421{
 422    int bits;
 423    for (bits = 0; bits < 32; bits++) {
 424	outb_p(MDIO_DATA_WRITE1, addr);
 425	outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
 426    }
 427}
 428
 429static int mdio_read(unsigned int addr, int phy_id, int loc)
 430{
 431    u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
 432    int i, retval = 0;
 433
 434    mdio_sync(addr);
 435    for (i = 14; i >= 0; i--) {
 436	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
 437	outb_p(dat, addr);
 438	outb_p(dat | MDIO_SHIFT_CLK, addr);
 439    }
 440    for (i = 19; i > 0; i--) {
 441	outb_p(MDIO_ENB_IN, addr);
 442	retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
 443	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
 444    }
 445    return (retval>>1) & 0xffff;
 446}
 447
 448static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
 449{
 450    u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
 451    int i;
 452
 453    mdio_sync(addr);
 454    for (i = 31; i >= 0; i--) {
 455	int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
 456	outb_p(dat, addr);
 457	outb_p(dat | MDIO_SHIFT_CLK, addr);
 458    }
 459    for (i = 1; i >= 0; i--) {
 460	outb_p(MDIO_ENB_IN, addr);
 461	outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
 462    }
 463}
 464
 465/*====================================================================*/
 466
 467static int axnet_open(struct net_device *dev)
 468{
 469    int ret;
 470    axnet_dev_t *info = PRIV(dev);
 471    struct pcmcia_device *link = info->p_dev;
 472    unsigned int nic_base = dev->base_addr;
 473    
 474    dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
 475
 476    if (!pcmcia_dev_present(link))
 477	return -ENODEV;
 478
 479    outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
 480    ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
 481    if (ret)
 482	    return ret;
 483
 484    link->open++;
 485
 486    info->link_status = 0x00;
 487    init_timer(&info->watchdog);
 488    info->watchdog.function = ei_watchdog;
 489    info->watchdog.data = (u_long)dev;
 490    info->watchdog.expires = jiffies + HZ;
 491    add_timer(&info->watchdog);
 492
 493    return ax_open(dev);
 494} /* axnet_open */
 495
 496/*====================================================================*/
 497
 498static int axnet_close(struct net_device *dev)
 499{
 500    axnet_dev_t *info = PRIV(dev);
 501    struct pcmcia_device *link = info->p_dev;
 502
 503    dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
 504
 505    ax_close(dev);
 506    free_irq(dev->irq, dev);
 507    
 508    link->open--;
 509    netif_stop_queue(dev);
 510    del_timer_sync(&info->watchdog);
 511
 512    return 0;
 513} /* axnet_close */
 514
 515/*======================================================================
 516
 517    Hard reset the card.  This used to pause for the same period that
 518    a 8390 reset command required, but that shouldn't be necessary.
 519
 520======================================================================*/
 521
 522static void axnet_reset_8390(struct net_device *dev)
 523{
 524    unsigned int nic_base = dev->base_addr;
 525    int i;
 526
 527    ei_status.txing = ei_status.dmaing = 0;
 528
 529    outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
 530
 531    outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
 532
 533    for (i = 0; i < 100; i++) {
 534	if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
 535	    break;
 536	udelay(100);
 537    }
 538    outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
 539    
 540    if (i == 100)
 541	netdev_err(dev, "axnet_reset_8390() did not complete\n");
 542    
 543} /* axnet_reset_8390 */
 544
 545/*====================================================================*/
 546
 547static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
 548{
 549    struct net_device *dev = dev_id;
 550    PRIV(dev)->stale = 0;
 551    return ax_interrupt(irq, dev_id);
 552}
 553
 554static void ei_watchdog(u_long arg)
 555{
 556    struct net_device *dev = (struct net_device *)(arg);
 557    axnet_dev_t *info = PRIV(dev);
 558    unsigned int nic_base = dev->base_addr;
 559    unsigned int mii_addr = nic_base + AXNET_MII_EEP;
 560    u_short link;
 561
 562    if (!netif_device_present(dev)) goto reschedule;
 563
 564    /* Check for pending interrupt with expired latency timer: with
 565       this, we can limp along even if the interrupt is blocked */
 566    if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
 567	if (!info->fast_poll)
 568	    netdev_info(dev, "interrupt(s) dropped!\n");
 569	ei_irq_wrapper(dev->irq, dev);
 570	info->fast_poll = HZ;
 571    }
 572    if (info->fast_poll) {
 573	info->fast_poll--;
 574	info->watchdog.expires = jiffies + 1;
 575	add_timer(&info->watchdog);
 576	return;
 577    }
 578
 579    if (info->phy_id < 0)
 580	goto reschedule;
 581    link = mdio_read(mii_addr, info->phy_id, 1);
 582    if (!link || (link == 0xffff)) {
 583	netdev_info(dev, "MII is missing!\n");
 584	info->phy_id = -1;
 585	goto reschedule;
 586    }
 587
 588    link &= 0x0004;
 589    if (link != info->link_status) {
 590	u_short p = mdio_read(mii_addr, info->phy_id, 5);
 591	netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
 592	if (link) {
 593	    info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
 594	    if (p)
 595		netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
 596			    (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
 597	    else
 598		netdev_info(dev, "link partner did not autonegotiate\n");
 599	    AX88190_init(dev, 1);
 600	}
 601	info->link_status = link;
 602    }
 603
 604reschedule:
 605    info->watchdog.expires = jiffies + HZ;
 606    add_timer(&info->watchdog);
 607}
 608
 609/*====================================================================*/
 610
 611static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 612{
 613    axnet_dev_t *info = PRIV(dev);
 614    struct mii_ioctl_data *data = if_mii(rq);
 615    unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
 616    switch (cmd) {
 617    case SIOCGMIIPHY:
 618	data->phy_id = info->phy_id;
 619    case SIOCGMIIREG:		/* Read MII PHY register. */
 620	data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
 621	return 0;
 622    case SIOCSMIIREG:		/* Write MII PHY register. */
 623	mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
 624	return 0;
 625    }
 626    return -EOPNOTSUPP;
 627}
 628
 629/*====================================================================*/
 630
 631static void get_8390_hdr(struct net_device *dev,
 632			 struct e8390_pkt_hdr *hdr,
 633			 int ring_page)
 634{
 635    unsigned int nic_base = dev->base_addr;
 636
 637    outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
 638    outb_p(ring_page, nic_base + EN0_RSARHI);
 639    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
 640
 641    insw(nic_base + AXNET_DATAPORT, hdr,
 642	    sizeof(struct e8390_pkt_hdr)>>1);
 643    /* Fix for big endian systems */
 644    hdr->count = le16_to_cpu(hdr->count);
 645
 646}
 647
 648/*====================================================================*/
 649
 650static void block_input(struct net_device *dev, int count,
 651			struct sk_buff *skb, int ring_offset)
 652{
 653    unsigned int nic_base = dev->base_addr;
 654    int xfer_count = count;
 655    char *buf = skb->data;
 656
 657    if ((ei_debug > 4) && (count != 4))
 658	    pr_debug("%s: [bi=%d]\n", dev->name, count+4);
 659    outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
 660    outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
 661    outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
 662
 663    insw(nic_base + AXNET_DATAPORT,buf,count>>1);
 664    if (count & 0x01)
 665	buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
 666
 667}
 668
 669/*====================================================================*/
 670
 671static void block_output(struct net_device *dev, int count,
 672			 const u_char *buf, const int start_page)
 673{
 674    unsigned int nic_base = dev->base_addr;
 675
 676    pr_debug("%s: [bo=%d]\n", dev->name, count);
 677
 678    /* Round the count up for word writes.  Do we need to do this?
 679       What effect will an odd byte count have on the 8390?
 680       I should check someday. */
 681    if (count & 0x01)
 682	count++;
 683
 684    outb_p(0x00, nic_base + EN0_RSARLO);
 685    outb_p(start_page, nic_base + EN0_RSARHI);
 686    outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
 687    outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
 688}
 689
 690static const struct pcmcia_device_id axnet_ids[] = {
 691	PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
 692	PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
 693	PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
 694	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
 695	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
 696	PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
 697	PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
 698	PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
 699	PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), 
 700	PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
 701	PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
 702	PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
 703	PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
 704	PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
 705	PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
 706	PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
 707	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
 708	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
 709	PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
 710	PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
 711	PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
 712	PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
 713	PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
 714	PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
 715	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
 716	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
 717	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
 718	PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6,  0xab9be5ef),
 719	PCMCIA_DEVICE_NULL,
 720};
 721MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
 722
 723static struct pcmcia_driver axnet_cs_driver = {
 724	.owner		= THIS_MODULE,
 725	.name		= "axnet_cs",
 726	.probe		= axnet_probe,
 727	.remove		= axnet_detach,
 728	.id_table       = axnet_ids,
 729	.suspend	= axnet_suspend,
 730	.resume		= axnet_resume,
 731};
 732
 733static int __init init_axnet_cs(void)
 734{
 735	return pcmcia_register_driver(&axnet_cs_driver);
 736}
 737
 738static void __exit exit_axnet_cs(void)
 739{
 740	pcmcia_unregister_driver(&axnet_cs_driver);
 741}
 742
 743module_init(init_axnet_cs);
 744module_exit(exit_axnet_cs);
 745
 746/*====================================================================*/
 747
 748/* 8390.c: A general NS8390 ethernet driver core for linux. */
 749/*
 750	Written 1992-94 by Donald Becker.
 751  
 752	Copyright 1993 United States Government as represented by the
 753	Director, National Security Agency.
 754
 755	This software may be used and distributed according to the terms
 756	of the GNU General Public License, incorporated herein by reference.
 757
 758	The author may be reached as becker@scyld.com, or C/O
 759	Scyld Computing Corporation
 760	410 Severn Ave., Suite 210
 761	Annapolis MD 21403
 762
 763  This is the chip-specific code for many 8390-based ethernet adaptors.
 764  This is not a complete driver, it must be combined with board-specific
 765  code such as ne.c, wd.c, 3c503.c, etc.
 766
 767  Seeing how at least eight drivers use this code, (not counting the
 768  PCMCIA ones either) it is easy to break some card by what seems like
 769  a simple innocent change. Please contact me or Donald if you think
 770  you have found something that needs changing. -- PG
 771
 772  Changelog:
 773
 774  Paul Gortmaker	: remove set_bit lock, other cleanups.
 775  Paul Gortmaker	: add ei_get_8390_hdr() so we can pass skb's to 
 776			  ei_block_input() for eth_io_copy_and_sum().
 777  Paul Gortmaker	: exchange static int ei_pingpong for a #define,
 778			  also add better Tx error handling.
 779  Paul Gortmaker	: rewrite Rx overrun handling as per NS specs.
 780  Alexey Kuznetsov	: use the 8390's six bit hash multicast filter.
 781  Paul Gortmaker	: tweak ANK's above multicast changes a bit.
 782  Paul Gortmaker	: update packet statistics for v2.1.x
 783  Alan Cox		: support arbitrary stupid port mappings on the
 784  			  68K Macintosh. Support >16bit I/O spaces
 785  Paul Gortmaker	: add kmod support for auto-loading of the 8390
 786			  module by all drivers that require it.
 787  Alan Cox		: Spinlocking work, added 'BUG_83C690'
 788  Paul Gortmaker	: Separate out Tx timeout code from Tx path.
 789
 790  Sources:
 791  The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
 792
 793  */
 794
 795#include <linux/bitops.h>
 796#include <asm/irq.h>
 797#include <linux/fcntl.h>
 798#include <linux/in.h>
 799#include <linux/interrupt.h>
 800
 801#define BUG_83C690
 802
 803/* These are the operational function interfaces to board-specific
 804   routines.
 805	void reset_8390(struct net_device *dev)
 806		Resets the board associated with DEV, including a hardware reset of
 807		the 8390.  This is only called when there is a transmit timeout, and
 808		it is always followed by 8390_init().
 809	void block_output(struct net_device *dev, int count, const unsigned char *buf,
 810					  int start_page)
 811		Write the COUNT bytes of BUF to the packet buffer at START_PAGE.  The
 812		"page" value uses the 8390's 256-byte pages.
 813	void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
 814		Read the 4 byte, page aligned 8390 header. *If* there is a
 815		subsequent read, it will be of the rest of the packet.
 816	void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 817		Read COUNT bytes from the packet buffer into the skb data area. Start 
 818		reading from RING_OFFSET, the address as the 8390 sees it.  This will always
 819		follow the read of the 8390 header. 
 820*/
 821#define ei_reset_8390 (ei_local->reset_8390)
 822#define ei_block_output (ei_local->block_output)
 823#define ei_block_input (ei_local->block_input)
 824#define ei_get_8390_hdr (ei_local->get_8390_hdr)
 825
 826/* use 0 for production, 1 for verification, >2 for debug */
 827#ifndef ei_debug
 828int ei_debug = 1;
 829#endif
 830
 831/* Index to functions. */
 832static void ei_tx_intr(struct net_device *dev);
 833static void ei_tx_err(struct net_device *dev);
 834static void ei_receive(struct net_device *dev);
 835static void ei_rx_overrun(struct net_device *dev);
 836
 837/* Routines generic to NS8390-based boards. */
 838static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
 839								int start_page);
 840static void do_set_multicast_list(struct net_device *dev);
 841
 842/*
 843 *	SMP and the 8390 setup.
 844 *
 845 *	The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
 846 *	a page register that controls bank and packet buffer access. We guard
 847 *	this with ei_local->page_lock. Nobody should assume or set the page other
 848 *	than zero when the lock is not held. Lock holders must restore page 0
 849 *	before unlocking. Even pure readers must take the lock to protect in 
 850 *	page 0.
 851 *
 852 *	To make life difficult the chip can also be very slow. We therefore can't
 853 *	just use spinlocks. For the longer lockups we disable the irq the device
 854 *	sits on and hold the lock. We must hold the lock because there is a dual
 855 *	processor case other than interrupts (get stats/set multicast list in
 856 *	parallel with each other and transmit).
 857 *
 858 *	Note: in theory we can just disable the irq on the card _but_ there is
 859 *	a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
 860 *	enter lock, take the queued irq. So we waddle instead of flying.
 861 *
 862 *	Finally by special arrangement for the purpose of being generally 
 863 *	annoying the transmit function is called bh atomic. That places
 864 *	restrictions on the user context callers as disable_irq won't save
 865 *	them.
 866 */
 867 
 868/**
 869 * ax_open - Open/initialize the board.
 870 * @dev: network device to initialize
 871 *
 872 * This routine goes all-out, setting everything
 873 * up anew at each open, even though many of these registers should only
 874 * need to be set once at boot.
 875 */
 876static int ax_open(struct net_device *dev)
 877{
 878	unsigned long flags;
 879	struct ei_device *ei_local = netdev_priv(dev);
 880
 881	/*
 882	 *	Grab the page lock so we own the register set, then call
 883	 *	the init function.
 884	 */
 885      
 886      	spin_lock_irqsave(&ei_local->page_lock, flags);
 887	AX88190_init(dev, 1);
 888	/* Set the flag before we drop the lock, That way the IRQ arrives
 889	   after its set and we get no silly warnings */
 890	netif_start_queue(dev);
 891      	spin_unlock_irqrestore(&ei_local->page_lock, flags);
 892	ei_local->irqlock = 0;
 893	return 0;
 894}
 895
 896#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
 897
 898/**
 899 * ax_close - shut down network device
 900 * @dev: network device to close
 901 *
 902 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
 903 */
 904static int ax_close(struct net_device *dev)
 905{
 906	unsigned long flags;
 907
 908	/*
 909	 *      Hold the page lock during close
 910	 */
 911
 912	spin_lock_irqsave(&dev_lock(dev), flags);
 913	AX88190_init(dev, 0);
 914	spin_unlock_irqrestore(&dev_lock(dev), flags);
 915	netif_stop_queue(dev);
 916	return 0;
 917}
 918
 919/**
 920 * axnet_tx_timeout - handle transmit time out condition
 921 * @dev: network device which has apparently fallen asleep
 922 *
 923 * Called by kernel when device never acknowledges a transmit has
 924 * completed (or failed) - i.e. never posted a Tx related interrupt.
 925 */
 926
 927static void axnet_tx_timeout(struct net_device *dev)
 928{
 929	long e8390_base = dev->base_addr;
 930	struct ei_device *ei_local = netdev_priv(dev);
 931	int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
 932	unsigned long flags;
 933
 934	dev->stats.tx_errors++;
 935
 936	spin_lock_irqsave(&ei_local->page_lock, flags);
 937	txsr = inb(e8390_base+EN0_TSR);
 938	isr = inb(e8390_base+EN0_ISR);
 939	spin_unlock_irqrestore(&ei_local->page_lock, flags);
 940
 941	netdev_printk(KERN_DEBUG, dev,
 942		      "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
 943		      (txsr & ENTSR_ABT) ? "excess collisions." :
 944		      (isr) ? "lost interrupt?" : "cable problem?",
 945		      txsr, isr, tickssofar);
 946
 947	if (!isr && !dev->stats.tx_packets) 
 948	{
 949		/* The 8390 probably hasn't gotten on the cable yet. */
 950		ei_local->interface_num ^= 1;   /* Try a different xcvr.  */
 951	}
 952
 953	/* Ugly but a reset can be slow, yet must be protected */
 954		
 955	spin_lock_irqsave(&ei_local->page_lock, flags);
 956		
 957	/* Try to restart the card.  Perhaps the user has fixed something. */
 958	ei_reset_8390(dev);
 959	AX88190_init(dev, 1);
 960		
 961	spin_unlock_irqrestore(&ei_local->page_lock, flags);
 962	netif_wake_queue(dev);
 963}
 964    
 965/**
 966 * axnet_start_xmit - begin packet transmission
 967 * @skb: packet to be sent
 968 * @dev: network device to which packet is sent
 969 *
 970 * Sends a packet to an 8390 network device.
 971 */
 972 
 973static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
 974					  struct net_device *dev)
 975{
 976	long e8390_base = dev->base_addr;
 977	struct ei_device *ei_local = netdev_priv(dev);
 978	int length, send_length, output_page;
 979	unsigned long flags;
 980	u8 packet[ETH_ZLEN];
 981	
 982	netif_stop_queue(dev);
 983
 984	length = skb->len;
 985
 986	/* Mask interrupts from the ethercard. 
 987	   SMP: We have to grab the lock here otherwise the IRQ handler
 988	   on another CPU can flip window and race the IRQ mask set. We end
 989	   up trashing the mcast filter not disabling irqs if we don't lock */
 990	   
 991	spin_lock_irqsave(&ei_local->page_lock, flags);
 992	outb_p(0x00, e8390_base + EN0_IMR);
 993	
 994	/*
 995	 *	Slow phase with lock held.
 996	 */
 997	 
 998	ei_local->irqlock = 1;
 999
1000	send_length = max(length, ETH_ZLEN);
1001
1002	/*
1003	 * We have two Tx slots available for use. Find the first free
1004	 * slot, and then perform some sanity checks. With two Tx bufs,
1005	 * you get very close to transmitting back-to-back packets. With
1006	 * only one Tx buf, the transmitter sits idle while you reload the
1007	 * card, leaving a substantial gap between each transmitted packet.
1008	 */
1009
1010	if (ei_local->tx1 == 0) 
1011	{
1012		output_page = ei_local->tx_start_page;
1013		ei_local->tx1 = send_length;
1014		if (ei_debug  &&  ei_local->tx2 > 0)
1015			netdev_printk(KERN_DEBUG, dev,
1016				      "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1017				      ei_local->tx2, ei_local->lasttx,
1018				      ei_local->txing);
1019	}
1020	else if (ei_local->tx2 == 0) 
1021	{
1022		output_page = ei_local->tx_start_page + TX_PAGES/2;
1023		ei_local->tx2 = send_length;
1024		if (ei_debug  &&  ei_local->tx1 > 0)
1025			netdev_printk(KERN_DEBUG, dev,
1026				      "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1027				      ei_local->tx1, ei_local->lasttx,
1028				      ei_local->txing);
1029	}
1030	else
1031	{	/* We should never get here. */
1032		if (ei_debug)
1033			netdev_printk(KERN_DEBUG, dev,
1034				      "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1035				      ei_local->tx1, ei_local->tx2,
1036				      ei_local->lasttx);
1037		ei_local->irqlock = 0;
1038		netif_stop_queue(dev);
1039		outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1040		spin_unlock_irqrestore(&ei_local->page_lock, flags);
1041		dev->stats.tx_errors++;
1042		return NETDEV_TX_BUSY;
1043	}
1044
1045	/*
1046	 * Okay, now upload the packet and trigger a send if the transmitter
1047	 * isn't already sending. If it is busy, the interrupt handler will
1048	 * trigger the send later, upon receiving a Tx done interrupt.
1049	 */
1050
1051	if (length == skb->len)
1052		ei_block_output(dev, length, skb->data, output_page);
1053	else {
1054		memset(packet, 0, ETH_ZLEN);
1055		skb_copy_from_linear_data(skb, packet, skb->len);
1056		ei_block_output(dev, length, packet, output_page);
1057	}
1058	
1059	if (! ei_local->txing) 
1060	{
1061		ei_local->txing = 1;
1062		NS8390_trigger_send(dev, send_length, output_page);
1063		dev->trans_start = jiffies;
1064		if (output_page == ei_local->tx_start_page) 
1065		{
1066			ei_local->tx1 = -1;
1067			ei_local->lasttx = -1;
1068		}
1069		else 
1070		{
1071			ei_local->tx2 = -1;
1072			ei_local->lasttx = -2;
1073		}
1074	}
1075	else ei_local->txqueue++;
1076
1077	if (ei_local->tx1  &&  ei_local->tx2)
1078		netif_stop_queue(dev);
1079	else
1080		netif_start_queue(dev);
1081
1082	/* Turn 8390 interrupts back on. */
1083	ei_local->irqlock = 0;
1084	outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1085	
1086	spin_unlock_irqrestore(&ei_local->page_lock, flags);
1087
1088	dev_kfree_skb (skb);
1089	dev->stats.tx_bytes += send_length;
1090    
1091	return NETDEV_TX_OK;
1092}
1093
1094/**
1095 * ax_interrupt - handle the interrupts from an 8390
1096 * @irq: interrupt number
1097 * @dev_id: a pointer to the net_device
1098 *
1099 * Handle the ether interface interrupts. We pull packets from
1100 * the 8390 via the card specific functions and fire them at the networking
1101 * stack. We also handle transmit completions and wake the transmit path if
1102 * necessary. We also update the counters and do other housekeeping as
1103 * needed.
1104 */
1105
1106static irqreturn_t ax_interrupt(int irq, void *dev_id)
1107{
1108	struct net_device *dev = dev_id;
1109	long e8390_base;
1110	int interrupts, nr_serviced = 0, i;
1111	struct ei_device *ei_local;
1112    	int handled = 0;
1113	unsigned long flags;
1114
1115	e8390_base = dev->base_addr;
1116	ei_local = netdev_priv(dev);
1117
1118	/*
1119	 *	Protect the irq test too.
1120	 */
1121	 
1122	spin_lock_irqsave(&ei_local->page_lock, flags);
1123
1124	if (ei_local->irqlock) {
1125#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1126		const char *msg;
1127		/* The "irqlock" check is only for testing. */
1128		if (ei_local->irqlock)
1129			msg = "Interrupted while interrupts are masked!";
1130		else
1131			msg = "Reentering the interrupt handler!";
1132		netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1133			    msg,
1134			    inb_p(e8390_base + EN0_ISR),
1135			    inb_p(e8390_base + EN0_IMR));
1136#endif
1137		spin_unlock_irqrestore(&ei_local->page_lock, flags);
1138		return IRQ_NONE;
1139	}
1140    
1141	if (ei_debug > 3)
1142		netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n",
1143			      inb_p(e8390_base + EN0_ISR));
1144
1145	outb_p(0x00, e8390_base + EN0_ISR);
1146	ei_local->irqlock = 1;
1147   
1148	/* !!Assumption!! -- we stay in page 0.	 Don't break this. */
1149	while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1150	       ++nr_serviced < MAX_SERVICE)
1151	{
1152		if (!netif_running(dev) || (interrupts == 0xff)) {
1153			if (ei_debug > 1)
1154				netdev_warn(dev,
1155					    "interrupt from stopped card\n");
1156			outb_p(interrupts, e8390_base + EN0_ISR);
1157			interrupts = 0;
1158			break;
1159		}
1160		handled = 1;
1161
1162		/* AX88190 bug fix. */
1163		outb_p(interrupts, e8390_base + EN0_ISR);
1164		for (i = 0; i < 10; i++) {
1165			if (!(inb(e8390_base + EN0_ISR) & interrupts))
1166				break;
1167			outb_p(0, e8390_base + EN0_ISR);
1168			outb_p(interrupts, e8390_base + EN0_ISR);
1169		}
1170		if (interrupts & ENISR_OVER) 
1171			ei_rx_overrun(dev);
1172		else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) 
1173		{
1174			/* Got a good (?) packet. */
1175			ei_receive(dev);
1176		}
1177		/* Push the next to-transmit packet through. */
1178		if (interrupts & ENISR_TX)
1179			ei_tx_intr(dev);
1180		else if (interrupts & ENISR_TX_ERR)
1181			ei_tx_err(dev);
1182
1183		if (interrupts & ENISR_COUNTERS) 
1184		{
1185			dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1186			dev->stats.rx_crc_errors   += inb_p(e8390_base + EN0_COUNTER1);
1187			dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1188		}
1189	}
1190    
1191	if (interrupts && ei_debug > 3) 
1192	{
1193		handled = 1;
1194		if (nr_serviced >= MAX_SERVICE) 
1195		{
1196			/* 0xFF is valid for a card removal */
1197			if(interrupts!=0xFF)
1198				netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n",
1199					    interrupts);
1200			outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1201		} else {
1202			netdev_warn(dev, "unknown interrupt %#2x\n",
1203				    interrupts);
1204			outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1205		}
1206	}
1207
1208	/* Turn 8390 interrupts back on. */
1209	ei_local->irqlock = 0;
1210	outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1211
1212	spin_unlock_irqrestore(&ei_local->page_lock, flags);
1213	return IRQ_RETVAL(handled);
1214}
1215
1216/**
1217 * ei_tx_err - handle transmitter error
1218 * @dev: network device which threw the exception
1219 *
1220 * A transmitter error has happened. Most likely excess collisions (which
1221 * is a fairly normal condition). If the error is one where the Tx will
1222 * have been aborted, we try and send another one right away, instead of
1223 * letting the failed packet sit and collect dust in the Tx buffer. This
1224 * is a much better solution as it avoids kernel based Tx timeouts, and
1225 * an unnecessary card reset.
1226 *
1227 * Called with lock held.
1228 */
1229
1230static void ei_tx_err(struct net_device *dev)
1231{
1232	long e8390_base = dev->base_addr;
1233	unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1234	unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1235
1236#ifdef VERBOSE_ERROR_DUMP
1237	netdev_printk(KERN_DEBUG, dev,
1238		      "transmitter error (%#2x):", txsr);
1239	if (txsr & ENTSR_ABT)
1240		pr_cont(" excess-collisions");
1241	if (txsr & ENTSR_ND)
1242		pr_cont(" non-deferral");
1243	if (txsr & ENTSR_CRS)
1244		pr_cont(" lost-carrier");
1245	if (txsr & ENTSR_FU)
1246		pr_cont(" FIFO-underrun");
1247	if (txsr & ENTSR_CDH)
1248		pr_cont(" lost-heartbeat");
1249	pr_cont("\n");
1250#endif
1251
1252	if (tx_was_aborted)
1253		ei_tx_intr(dev);
1254	else 
1255	{
1256		dev->stats.tx_errors++;
1257		if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1258		if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1259		if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1260	}
1261}
1262
1263/**
1264 * ei_tx_intr - transmit interrupt handler
1265 * @dev: network device for which tx intr is handled
1266 *
1267 * We have finished a transmit: check for errors and then trigger the next
1268 * packet to be sent. Called with lock held.
1269 */
1270
1271static void ei_tx_intr(struct net_device *dev)
1272{
1273	long e8390_base = dev->base_addr;
1274	struct ei_device *ei_local = netdev_priv(dev);
1275	int status = inb(e8390_base + EN0_TSR);
1276    
1277	/*
1278	 * There are two Tx buffers, see which one finished, and trigger
1279	 * the send of another one if it exists.
1280	 */
1281	ei_local->txqueue--;
1282
1283	if (ei_local->tx1 < 0) 
1284	{
1285		if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1286			netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1287				   ei_local->name, ei_local->lasttx,
1288				   ei_local->tx1);
1289		ei_local->tx1 = 0;
1290		if (ei_local->tx2 > 0) 
1291		{
1292			ei_local->txing = 1;
1293			NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1294			dev->trans_start = jiffies;
1295			ei_local->tx2 = -1,
1296			ei_local->lasttx = 2;
1297		}
1298		else ei_local->lasttx = 20, ei_local->txing = 0;	
1299	}
1300	else if (ei_local->tx2 < 0) 
1301	{
1302		if (ei_local->lasttx != 2  &&  ei_local->lasttx != -2)
1303			netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1304				    ei_local->name, ei_local->lasttx,
1305				    ei_local->tx2);
1306		ei_local->tx2 = 0;
1307		if (ei_local->tx1 > 0) 
1308		{
1309			ei_local->txing = 1;
1310			NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1311			dev->trans_start = jiffies;
1312			ei_local->tx1 = -1;
1313			ei_local->lasttx = 1;
1314		}
1315		else
1316			ei_local->lasttx = 10, ei_local->txing = 0;
1317	}
1318//	else
1319//		netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1320//			    ei_local->lasttx);
1321
1322	/* Minimize Tx latency: update the statistics after we restart TXing. */
1323	if (status & ENTSR_COL)
1324		dev->stats.collisions++;
1325	if (status & ENTSR_PTX)
1326		dev->stats.tx_packets++;
1327	else 
1328	{
1329		dev->stats.tx_errors++;
1330		if (status & ENTSR_ABT) 
1331		{
1332			dev->stats.tx_aborted_errors++;
1333			dev->stats.collisions += 16;
1334		}
1335		if (status & ENTSR_CRS) 
1336			dev->stats.tx_carrier_errors++;
1337		if (status & ENTSR_FU) 
1338			dev->stats.tx_fifo_errors++;
1339		if (status & ENTSR_CDH)
1340			dev->stats.tx_heartbeat_errors++;
1341		if (status & ENTSR_OWC)
1342			dev->stats.tx_window_errors++;
1343	}
1344	netif_wake_queue(dev);
1345}
1346
1347/**
1348 * ei_receive - receive some packets
1349 * @dev: network device with which receive will be run
1350 *
1351 * We have a good packet(s), get it/them out of the buffers. 
1352 * Called with lock held.
1353 */
1354
1355static void ei_receive(struct net_device *dev)
1356{
1357	long e8390_base = dev->base_addr;
1358	struct ei_device *ei_local = netdev_priv(dev);
1359	unsigned char rxing_page, this_frame, next_frame;
1360	unsigned short current_offset;
1361	int rx_pkt_count = 0;
1362	struct e8390_pkt_hdr rx_frame;
1363    
1364	while (++rx_pkt_count < 10) 
1365	{
1366		int pkt_len, pkt_stat;
1367		
1368		/* Get the rx page (incoming packet pointer). */
1369		rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1370		
1371		/* Remove one frame from the ring.  Boundary is always a page behind. */
1372		this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1373		if (this_frame >= ei_local->stop_page)
1374			this_frame = ei_local->rx_start_page;
1375		
1376		/* Someday we'll omit the previous, iff we never get this message.
1377		   (There is at least one clone claimed to have a problem.)  
1378		   
1379		   Keep quiet if it looks like a card removal. One problem here
1380		   is that some clones crash in roughly the same way.
1381		 */
1382		if (ei_debug > 0  &&  this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1383		    netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1384			       this_frame, ei_local->current_page);
1385		
1386		if (this_frame == rxing_page)	/* Read all the frames? */
1387			break;				/* Done for now */
1388		
1389		current_offset = this_frame << 8;
1390		ei_get_8390_hdr(dev, &rx_frame, this_frame);
1391		
1392		pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1393		pkt_stat = rx_frame.status;
1394		
1395		next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1396		
1397		if (pkt_len < 60  ||  pkt_len > 1518) 
1398		{
1399			if (ei_debug)
1400				netdev_printk(KERN_DEBUG, dev,
1401					      "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1402					      rx_frame.count, rx_frame.status,
1403					      rx_frame.next);
1404			dev->stats.rx_errors++;
1405			dev->stats.rx_length_errors++;
1406		}
1407		 else if ((pkt_stat & 0x0F) == ENRSR_RXOK) 
1408		{
1409			struct sk_buff *skb;
1410			
1411			skb = dev_alloc_skb(pkt_len+2);
1412			if (skb == NULL) 
1413			{
1414				if (ei_debug > 1)
1415					netdev_printk(KERN_DEBUG, dev,
1416						      "Couldn't allocate a sk_buff of size %d\n",
1417						      pkt_len);
1418				dev->stats.rx_dropped++;
1419				break;
1420			}
1421			else
1422			{
1423				skb_reserve(skb,2);	/* IP headers on 16 byte boundaries */
1424				skb_put(skb, pkt_len);	/* Make room */
1425				ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1426				skb->protocol=eth_type_trans(skb,dev);
1427				netif_rx(skb);
1428				dev->stats.rx_packets++;
1429				dev->stats.rx_bytes += pkt_len;
1430				if (pkt_stat & ENRSR_PHY)
1431					dev->stats.multicast++;
1432			}
1433		} 
1434		else 
1435		{
1436			if (ei_debug)
1437				netdev_printk(KERN_DEBUG, dev,
1438					      "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1439					      rx_frame.status, rx_frame.next,
1440					      rx_frame.count);
1441			dev->stats.rx_errors++;
1442			/* NB: The NIC counts CRC, frame and missed errors. */
1443			if (pkt_stat & ENRSR_FO)
1444				dev->stats.rx_fifo_errors++;
1445		}
1446		next_frame = rx_frame.next;
1447		
1448		/* This _should_ never happen: it's here for avoiding bad clones. */
1449		if (next_frame >= ei_local->stop_page) {
1450			netdev_info(dev, "next frame inconsistency, %#2x\n",
1451				    next_frame);
1452			next_frame = ei_local->rx_start_page;
1453		}
1454		ei_local->current_page = next_frame;
1455		outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1456	}
1457}
1458
1459/**
1460 * ei_rx_overrun - handle receiver overrun
1461 * @dev: network device which threw exception
1462 *
1463 * We have a receiver overrun: we have to kick the 8390 to get it started
1464 * again. Problem is that you have to kick it exactly as NS prescribes in
1465 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1466 * This includes causing "the NIC to defer indefinitely when it is stopped
1467 * on a busy network."  Ugh.
1468 * Called with lock held. Don't call this with the interrupts off or your
1469 * computer will hate you - it takes 10ms or so. 
1470 */
1471
1472static void ei_rx_overrun(struct net_device *dev)
1473{
1474	axnet_dev_t *info = PRIV(dev);
1475	long e8390_base = dev->base_addr;
1476	unsigned char was_txing, must_resend = 0;
1477    
1478	/*
1479	 * Record whether a Tx was in progress and then issue the
1480	 * stop command.
1481	 */
1482	was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1483	outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1484    
1485	if (ei_debug > 1)
1486		netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n");
1487	dev->stats.rx_over_errors++;
1488    
1489	/* 
1490	 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1491	 * We wait at least 2ms.
1492	 */
1493
1494	mdelay(2);
1495
1496	/*
1497	 * Reset RBCR[01] back to zero as per magic incantation.
1498	 */
1499	outb_p(0x00, e8390_base+EN0_RCNTLO);
1500	outb_p(0x00, e8390_base+EN0_RCNTHI);
1501
1502	/*
1503	 * See if any Tx was interrupted or not. According to NS, this
1504	 * step is vital, and skipping it will cause no end of havoc.
1505	 */
1506
1507	if (was_txing)
1508	{ 
1509		unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1510		if (!tx_completed)
1511			must_resend = 1;
1512	}
1513
1514	/*
1515	 * Have to enter loopback mode and then restart the NIC before
1516	 * you are allowed to slurp packets up off the ring.
1517	 */
1518	outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1519	outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1520
1521	/*
1522	 * Clear the Rx ring of all the debris, and ack the interrupt.
1523	 */
1524	ei_receive(dev);
1525
1526	/*
1527	 * Leave loopback mode, and resend any packet that got stopped.
1528	 */
1529	outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); 
1530	if (must_resend)
1531    		outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1532}
1533
1534/*
1535 *	Collect the stats. This is called unlocked and from several contexts.
1536 */
1537 
1538static struct net_device_stats *get_stats(struct net_device *dev)
1539{
1540	long ioaddr = dev->base_addr;
1541	struct ei_device *ei_local = netdev_priv(dev);
1542	unsigned long flags;
1543    
1544	/* If the card is stopped, just return the present stats. */
1545	if (!netif_running(dev))
1546		return &dev->stats;
1547
1548	spin_lock_irqsave(&ei_local->page_lock,flags);
1549	/* Read the counter registers, assuming we are in page 0. */
1550	dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1551	dev->stats.rx_crc_errors   += inb_p(ioaddr + EN0_COUNTER1);
1552	dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1553	spin_unlock_irqrestore(&ei_local->page_lock, flags);
1554    
1555	return &dev->stats;
1556}
1557
1558/*
1559 * Form the 64 bit 8390 multicast table from the linked list of addresses
1560 * associated with this dev structure.
1561 */
1562 
1563static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1564{
1565	struct netdev_hw_addr *ha;
1566	u32 crc;
1567
1568	netdev_for_each_mc_addr(ha, dev) {
1569		crc = ether_crc(ETH_ALEN, ha->addr);
1570		/* 
1571		 * The 8390 uses the 6 most significant bits of the
1572		 * CRC to index the multicast table.
1573		 */
1574		bits[crc>>29] |= (1<<((crc>>26)&7));
1575	}
1576}
1577
1578/**
1579 * do_set_multicast_list - set/clear multicast filter
1580 * @dev: net device for which multicast filter is adjusted
1581 *
1582 *	Set or clear the multicast filter for this adaptor.
1583 *	Must be called with lock held. 
1584 */
1585 
1586static void do_set_multicast_list(struct net_device *dev)
1587{
1588	long e8390_base = dev->base_addr;
1589	int i;
1590	struct ei_device *ei_local = netdev_priv(dev);
1591
1592	if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1593		memset(ei_local->mcfilter, 0, 8);
1594		if (!netdev_mc_empty(dev))
1595			make_mc_bits(ei_local->mcfilter, dev);
1596	} else {
1597		/* set to accept-all */
1598		memset(ei_local->mcfilter, 0xFF, 8);
1599	}
1600
1601	outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1602	for(i = 0; i < 8; i++) 
1603	{
1604		outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1605	}
1606	outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1607
1608  	if(dev->flags&IFF_PROMISC)
1609  		outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1610	else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1611  		outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1612  	else
1613  		outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1614
1615	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1616}
1617
1618/*
1619 *	Called without lock held. This is invoked from user context and may
1620 *	be parallel to just about everything else. Its also fairly quick and
1621 *	not called too often. Must protect against both bh and irq users
1622 */
1623
1624static void set_multicast_list(struct net_device *dev)
1625{
1626	unsigned long flags;
1627
1628	spin_lock_irqsave(&dev_lock(dev), flags);
1629	do_set_multicast_list(dev);
1630	spin_unlock_irqrestore(&dev_lock(dev), flags);
1631}	
1632
1633/* This page of functions should be 8390 generic */
1634/* Follow National Semi's recommendations for initializing the "NIC". */
1635
1636/**
1637 * AX88190_init - initialize 8390 hardware
1638 * @dev: network device to initialize
1639 * @startp: boolean.  non-zero value to initiate chip processing
1640 *
1641 *	Must be called with lock held.
1642 */
1643
1644static void AX88190_init(struct net_device *dev, int startp)
1645{
1646	axnet_dev_t *info = PRIV(dev);
1647	long e8390_base = dev->base_addr;
1648	struct ei_device *ei_local = netdev_priv(dev);
1649	int i;
1650	int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1651    
1652	if(sizeof(struct e8390_pkt_hdr)!=4)
1653    		panic("8390.c: header struct mispacked\n");    
1654	/* Follow National Semi's recommendations for initing the DP83902. */
1655	outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1656	outb_p(endcfg, e8390_base + EN0_DCFG);	/* 0x48 or 0x49 */
1657	/* Clear the remote byte count registers. */
1658	outb_p(0x00,  e8390_base + EN0_RCNTLO);
1659	outb_p(0x00,  e8390_base + EN0_RCNTHI);
1660	/* Set to monitor and loopback mode -- this is vital!. */
1661	outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1662	outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1663	/* Set the transmit page and receive ring. */
1664	outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1665	ei_local->tx1 = ei_local->tx2 = 0;
1666	outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1667	outb_p(ei_local->stop_

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