drivers/net/ethernet/3com/3c589

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This source file includes following definitions.
tc589_probe
tc589_detach
tc589_config
tc589_release
tc589_suspend
tc589_resume
tc589_wait_for_completion
read_eeprom
tc589_set_xcvr
dump_status
tc589_reset
netdev_get_drvinfo
el3_config
el3_open
el3_tx_timeout
pop_tx_status
el3_start_xmit
el3_interrupt
media_check
el3_get_stats
update_stats
el3_rx
set_rx_mode
set_multicast_list
el3_close
   1 /* ======================================================================
   2  *
   3  * A PCMCIA ethernet driver for the 3com 3c589 card.
   4  *
   5  * Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net
   6  *
   7  * 3c589_cs.c 1.162 2001/10/13 00:08:50
   8  *
   9  * The network driver code is based on Donald Becker's 3c589 code:
  10  *
  11  * Written 1994 by Donald Becker.
  12  * Copyright 1993 United States Government as represented by the
  13  * Director, National Security Agency.  This software may be used and
  14  * distributed according to the terms of the GNU General Public License,
  15  * incorporated herein by reference.
  16  * Donald Becker may be reached at becker@scyld.com
  17  *
  18  * Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk>
  19  *
  20  * ======================================================================
  21  */
  22 
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24 
  25 #define DRV_NAME        "3c589_cs"
  26 #define DRV_VERSION     "1.162-ac"
  27 
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/ptrace.h>
  31 #include <linux/slab.h>
  32 #include <linux/string.h>
  33 #include <linux/timer.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/in.h>
  36 #include <linux/delay.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/skbuff.h>
  41 #include <linux/if_arp.h>
  42 #include <linux/ioport.h>
  43 #include <linux/bitops.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/uaccess.h>
  46 #include <linux/io.h>
  47 
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/cisreg.h>
  50 #include <pcmcia/ciscode.h>
  51 #include <pcmcia/ds.h>
  52 
  53 
  54 /* To minimize the size of the driver source I only define operating
  55  * constants if they are used several times. You'll need the manual
  56  * if you want to understand driver details.
  57  */
  58 
  59 /* Offsets from base I/O address. */
  60 #define EL3_DATA        0x00
  61 #define EL3_TIMER       0x0a
  62 #define EL3_CMD         0x0e
  63 #define EL3_STATUS      0x0e
  64 
  65 #define EEPROM_READ     0x0080
  66 #define EEPROM_BUSY     0x8000
  67 
  68 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
  69 
  70 /* The top five bits written to EL3_CMD are a command, the lower
  71  * 11 bits are the parameter, if applicable.
  72  */
  73 
  74 enum c509cmd {
  75         TotalReset      = 0<<11,
  76         SelectWindow    = 1<<11,
  77         StartCoax       = 2<<11,
  78         RxDisable       = 3<<11,
  79         RxEnable        = 4<<11,
  80         RxReset         = 5<<11,
  81         RxDiscard       = 8<<11,
  82         TxEnable        = 9<<11,
  83         TxDisable       = 10<<11,
  84         TxReset         = 11<<11,
  85         FakeIntr        = 12<<11,
  86         AckIntr         = 13<<11,
  87         SetIntrEnb      = 14<<11,
  88         SetStatusEnb    = 15<<11,
  89         SetRxFilter     = 16<<11,
  90         SetRxThreshold  = 17<<11,
  91         SetTxThreshold  = 18<<11,
  92         SetTxStart      = 19<<11,
  93         StatsEnable     = 21<<11,
  94         StatsDisable    = 22<<11,
  95         StopCoax        = 23<<11
  96 };
  97 
  98 enum c509status {
  99         IntLatch        = 0x0001,
 100         AdapterFailure  = 0x0002,
 101         TxComplete      = 0x0004,
 102         TxAvailable     = 0x0008,
 103         RxComplete      = 0x0010,
 104         RxEarly         = 0x0020,
 105         IntReq          = 0x0040,
 106         StatsFull       = 0x0080,
 107         CmdBusy         = 0x1000
 108 };
 109 
 110 /* The SetRxFilter command accepts the following classes: */
 111 enum RxFilter {
 112         RxStation       = 1,
 113         RxMulticast     = 2,
 114         RxBroadcast     = 4,
 115         RxProm          = 8
 116 };
 117 
 118 /* Register window 1 offsets, the window used in normal operation. */
 119 #define TX_FIFO         0x00
 120 #define RX_FIFO         0x00
 121 #define RX_STATUS       0x08
 122 #define TX_STATUS       0x0B
 123 #define TX_FREE         0x0C    /* Remaining free bytes in Tx buffer. */
 124 
 125 #define WN0_IRQ         0x08    /* Window 0: Set IRQ line in bits 12-15. */
 126 #define WN4_MEDIA       0x0A    /* Window 4: Various transcvr/media bits. */
 127 #define MEDIA_TP        0x00C0  /* Enable link beat and jabber for 10baseT. */
 128 #define MEDIA_LED       0x0001  /* Enable link light on 3C589E cards. */
 129 
 130 /* Time in jiffies before concluding Tx hung */
 131 #define TX_TIMEOUT      ((400*HZ)/1000)
 132 
 133 struct el3_private {
 134         struct pcmcia_device    *p_dev;
 135         /* For transceiver monitoring */
 136         struct timer_list       media;
 137         u16                     media_status;
 138         u16                     fast_poll;
 139         unsigned long           last_irq;
 140         spinlock_t              lock;
 141 };
 142 
 143 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
 144 
 145 /*====================================================================*/
 146 
 147 /* Module parameters */
 148 
 149 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
 150 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
 151 MODULE_LICENSE("GPL");
 152 
 153 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
 154 
 155 /* Special hook for setting if_port when module is loaded */
 156 INT_MODULE_PARM(if_port, 0);
 157 
 158 
 159 /*====================================================================*/
 160 
 161 static int tc589_config(struct pcmcia_device *link);
 162 static void tc589_release(struct pcmcia_device *link);
 163 
 164 static u16 read_eeprom(unsigned int ioaddr, int index);
 165 static void tc589_reset(struct net_device *dev);
 166 static void media_check(struct timer_list *t);
 167 static int el3_config(struct net_device *dev, struct ifmap *map);
 168 static int el3_open(struct net_device *dev);
 169 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
 170                                         struct net_device *dev);
 171 static irqreturn_t el3_interrupt(int irq, void *dev_id);
 172 static void update_stats(struct net_device *dev);
 173 static struct net_device_stats *el3_get_stats(struct net_device *dev);
 174 static int el3_rx(struct net_device *dev);
 175 static int el3_close(struct net_device *dev);
 176 static void el3_tx_timeout(struct net_device *dev);
 177 static void set_rx_mode(struct net_device *dev);
 178 static void set_multicast_list(struct net_device *dev);
 179 static const struct ethtool_ops netdev_ethtool_ops;
 180 
 181 static void tc589_detach(struct pcmcia_device *p_dev);
 182 
 183 static const struct net_device_ops el3_netdev_ops = {
 184         .ndo_open               = el3_open,
 185         .ndo_stop               = el3_close,
 186         .ndo_start_xmit         = el3_start_xmit,
 187         .ndo_tx_timeout         = el3_tx_timeout,
 188         .ndo_set_config         = el3_config,
 189         .ndo_get_stats          = el3_get_stats,
 190         .ndo_set_rx_mode        = set_multicast_list,
 191         .ndo_set_mac_address    = eth_mac_addr,
 192         .ndo_validate_addr      = eth_validate_addr,
 193 };
 194 
 195 static int tc589_probe(struct pcmcia_device *link)
 196 {
 197         struct el3_private *lp;
 198         struct net_device *dev;
 199 
 200         dev_dbg(&link->dev, "3c589_attach()\n");
 201 
 202         /* Create new ethernet device */
 203         dev = alloc_etherdev(sizeof(struct el3_private));
 204         if (!dev)
 205                 return -ENOMEM;
 206         lp = netdev_priv(dev);
 207         link->priv = dev;
 208         lp->p_dev = link;
 209 
 210         spin_lock_init(&lp->lock);
 211         link->resource[0]->end = 16;
 212         link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
 213 
 214         link->config_flags |= CONF_ENABLE_IRQ;
 215         link->config_index = 1;
 216 
 217         dev->netdev_ops = &el3_netdev_ops;
 218         dev->watchdog_timeo = TX_TIMEOUT;
 219 
 220         dev->ethtool_ops = &netdev_ethtool_ops;
 221 
 222         return tc589_config(link);
 223 }
 224 
 225 static void tc589_detach(struct pcmcia_device *link)
 226 {
 227         struct net_device *dev = link->priv;
 228 
 229         dev_dbg(&link->dev, "3c589_detach\n");
 230 
 231         unregister_netdev(dev);
 232 
 233         tc589_release(link);
 234 
 235         free_netdev(dev);
 236 } /* tc589_detach */
 237 
 238 static int tc589_config(struct pcmcia_device *link)
 239 {
 240         struct net_device *dev = link->priv;
 241         __be16 *phys_addr;
 242         int ret, i, j, multi = 0, fifo;
 243         unsigned int ioaddr;
 244         static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
 245         u8 *buf;
 246         size_t len;
 247 
 248         dev_dbg(&link->dev, "3c589_config\n");
 249 
 250         phys_addr = (__be16 *)dev->dev_addr;
 251         /* Is this a 3c562? */
 252         if (link->manf_id != MANFID_3COM)
 253                 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
 254         multi = (link->card_id == PRODID_3COM_3C562);
 255 
 256         link->io_lines = 16;
 257 
 258         /* For the 3c562, the base address must be xx00-xx7f */
 259         for (i = j = 0; j < 0x400; j += 0x10) {
 260                 if (multi && (j & 0x80))
 261                         continue;
 262                 link->resource[0]->start = j ^ 0x300;
 263                 i = pcmcia_request_io(link);
 264                 if (i == 0)
 265                         break;
 266         }
 267         if (i != 0)
 268                 goto failed;
 269 
 270         ret = pcmcia_request_irq(link, el3_interrupt);
 271         if (ret)
 272                 goto failed;
 273 
 274         ret = pcmcia_enable_device(link);
 275         if (ret)
 276                 goto failed;
 277 
 278         dev->irq = link->irq;
 279         dev->base_addr = link->resource[0]->start;
 280         ioaddr = dev->base_addr;
 281         EL3WINDOW(0);
 282 
 283         /* The 3c589 has an extra EEPROM for configuration info, including
 284          * the hardware address.  The 3c562 puts the address in the CIS.
 285          */
 286         len = pcmcia_get_tuple(link, 0x88, &buf);
 287         if (buf && len >= 6) {
 288                 for (i = 0; i < 3; i++)
 289                         phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
 290                 kfree(buf);
 291         } else {
 292                 kfree(buf); /* 0 < len < 6 */
 293                 for (i = 0; i < 3; i++)
 294                         phys_addr[i] = htons(read_eeprom(ioaddr, i));
 295                 if (phys_addr[0] == htons(0x6060)) {
 296                         dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
 297                                         dev->base_addr, dev->base_addr+15);
 298                         goto failed;
 299                 }
 300         }
 301 
 302         /* The address and resource configuration register aren't loaded from
 303          * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version.
 304          */
 305 
 306         outw(0x3f00, ioaddr + 8);
 307         fifo = inl(ioaddr);
 308 
 309         /* The if_port symbol can be set when the module is loaded */
 310         if ((if_port >= 0) && (if_port <= 3))
 311                 dev->if_port = if_port;
 312         else
 313                 dev_err(&link->dev, "invalid if_port requested\n");
 314 
 315         SET_NETDEV_DEV(dev, &link->dev);
 316 
 317         if (register_netdev(dev) != 0) {
 318                 dev_err(&link->dev, "register_netdev() failed\n");
 319                 goto failed;
 320         }
 321 
 322         netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
 323                         (multi ? "562" : "589"), dev->base_addr, dev->irq,
 324                         dev->dev_addr);
 325         netdev_info(dev, "  %dK FIFO split %s Rx:Tx, %s xcvr\n",
 326                         (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
 327                         if_names[dev->if_port]);
 328         return 0;
 329 
 330 failed:
 331         tc589_release(link);
 332         return -ENODEV;
 333 } /* tc589_config */
 334 
 335 static void tc589_release(struct pcmcia_device *link)
 336 {
 337         pcmcia_disable_device(link);
 338 }
 339 
 340 static int tc589_suspend(struct pcmcia_device *link)
 341 {
 342         struct net_device *dev = link->priv;
 343 
 344         if (link->open)
 345                 netif_device_detach(dev);
 346 
 347         return 0;
 348 }
 349 
 350 static int tc589_resume(struct pcmcia_device *link)
 351 {
 352         struct net_device *dev = link->priv;
 353 
 354         if (link->open) {
 355                 tc589_reset(dev);
 356                 netif_device_attach(dev);
 357         }
 358 
 359         return 0;
 360 }
 361 
 362 /*====================================================================*/
 363 
 364 /* Use this for commands that may take time to finish */
 365 
 366 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
 367 {
 368         int i = 100;
 369         outw(cmd, dev->base_addr + EL3_CMD);
 370         while (--i > 0)
 371                 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000))
 372                         break;
 373         if (i == 0)
 374                 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
 375 }
 376 
 377 /* Read a word from the EEPROM using the regular EEPROM access register.
 378  * Assume that we are in register window zero.
 379  */
 380 
 381 static u16 read_eeprom(unsigned int ioaddr, int index)
 382 {
 383         int i;
 384         outw(EEPROM_READ + index, ioaddr + 10);
 385         /* Reading the eeprom takes 162 us */
 386         for (i = 1620; i >= 0; i--)
 387                 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
 388                         break;
 389         return inw(ioaddr + 12);
 390 }
 391 
 392 /* Set transceiver type, perhaps to something other than what the user
 393  * specified in dev->if_port.
 394  */
 395 
 396 static void tc589_set_xcvr(struct net_device *dev, int if_port)
 397 {
 398         struct el3_private *lp = netdev_priv(dev);
 399         unsigned int ioaddr = dev->base_addr;
 400 
 401         EL3WINDOW(0);
 402         switch (if_port) {
 403         case 0:
 404         case 1:
 405                 outw(0, ioaddr + 6);
 406                 break;
 407         case 2:
 408                 outw(3<<14, ioaddr + 6);
 409                 break;
 410         case 3:
 411                 outw(1<<14, ioaddr + 6);
 412                 break;
 413         }
 414         /* On PCMCIA, this just turns on the LED */
 415         outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
 416         /* 10baseT interface, enable link beat and jabber check. */
 417         EL3WINDOW(4);
 418         outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
 419         EL3WINDOW(1);
 420         if (if_port == 2)
 421                 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
 422         else
 423                 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
 424 }
 425 
 426 static void dump_status(struct net_device *dev)
 427 {
 428         unsigned int ioaddr = dev->base_addr;
 429         EL3WINDOW(1);
 430         netdev_info(dev, "  irq status %04x, rx status %04x, tx status %02x  tx free %04x\n",
 431                         inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
 432                         inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
 433         EL3WINDOW(4);
 434         netdev_info(dev, "  diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
 435                         inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
 436                         inw(ioaddr+0x0a));
 437         EL3WINDOW(1);
 438 }
 439 
 440 /* Reset and restore all of the 3c589 registers. */
 441 static void tc589_reset(struct net_device *dev)
 442 {
 443         unsigned int ioaddr = dev->base_addr;
 444         int i;
 445 
 446         EL3WINDOW(0);
 447         outw(0x0001, ioaddr + 4);                       /* Activate board. */
 448         outw(0x3f00, ioaddr + 8);                       /* Set the IRQ line. */
 449 
 450         /* Set the station address in window 2. */
 451         EL3WINDOW(2);
 452         for (i = 0; i < 6; i++)
 453                 outb(dev->dev_addr[i], ioaddr + i);
 454 
 455         tc589_set_xcvr(dev, dev->if_port);
 456 
 457         /* Switch to the stats window, and clear all stats by reading. */
 458         outw(StatsDisable, ioaddr + EL3_CMD);
 459         EL3WINDOW(6);
 460         for (i = 0; i < 9; i++)
 461                 inb(ioaddr+i);
 462         inw(ioaddr + 10);
 463         inw(ioaddr + 12);
 464 
 465         /* Switch to register set 1 for normal use. */
 466         EL3WINDOW(1);
 467 
 468         set_rx_mode(dev);
 469         outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
 470         outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
 471         outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
 472         /* Allow status bits to be seen. */
 473         outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
 474         /* Ack all pending events, and set active indicator mask. */
 475         outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
 476          ioaddr + EL3_CMD);
 477         outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
 478          | AdapterFailure, ioaddr + EL3_CMD);
 479 }
 480 
 481 static void netdev_get_drvinfo(struct net_device *dev,
 482                                struct ethtool_drvinfo *info)
 483 {
 484         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 485         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 486         snprintf(info->bus_info, sizeof(info->bus_info),
 487                 "PCMCIA 0x%lx", dev->base_addr);
 488 }
 489 
 490 static const struct ethtool_ops netdev_ethtool_ops = {
 491         .get_drvinfo            = netdev_get_drvinfo,
 492 };
 493 
 494 static int el3_config(struct net_device *dev, struct ifmap *map)
 495 {
 496         if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
 497                 if (map->port <= 3) {
 498                         dev->if_port = map->port;
 499                         netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
 500                         tc589_set_xcvr(dev, dev->if_port);
 501                 } else {
 502                         return -EINVAL;
 503                 }
 504         }
 505         return 0;
 506 }
 507 
 508 static int el3_open(struct net_device *dev)
 509 {
 510         struct el3_private *lp = netdev_priv(dev);
 511         struct pcmcia_device *link = lp->p_dev;
 512 
 513         if (!pcmcia_dev_present(link))
 514                 return -ENODEV;
 515 
 516         link->open++;
 517         netif_start_queue(dev);
 518 
 519         tc589_reset(dev);
 520         timer_setup(&lp->media, media_check, 0);
 521         mod_timer(&lp->media, jiffies + HZ);
 522 
 523         dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
 524           dev->name, inw(dev->base_addr + EL3_STATUS));
 525 
 526         return 0;
 527 }
 528 
 529 static void el3_tx_timeout(struct net_device *dev)
 530 {
 531         unsigned int ioaddr = dev->base_addr;
 532 
 533         netdev_warn(dev, "Transmit timed out!\n");
 534         dump_status(dev);
 535         dev->stats.tx_errors++;
 536         netif_trans_update(dev); /* prevent tx timeout */
 537         /* Issue TX_RESET and TX_START commands. */
 538         tc589_wait_for_completion(dev, TxReset);
 539         outw(TxEnable, ioaddr + EL3_CMD);
 540         netif_wake_queue(dev);
 541 }
 542 
 543 static void pop_tx_status(struct net_device *dev)
 544 {
 545         unsigned int ioaddr = dev->base_addr;
 546         int i;
 547 
 548         /* Clear the Tx status stack. */
 549         for (i = 32; i > 0; i--) {
 550                 u_char tx_status = inb(ioaddr + TX_STATUS);
 551                 if (!(tx_status & 0x84))
 552                         break;
 553                 /* reset transmitter on jabber error or underrun */
 554                 if (tx_status & 0x30)
 555                         tc589_wait_for_completion(dev, TxReset);
 556                 if (tx_status & 0x38) {
 557                         netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
 558                         outw(TxEnable, ioaddr + EL3_CMD);
 559                         dev->stats.tx_aborted_errors++;
 560                 }
 561                 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
 562         }
 563 }
 564 
 565 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
 566                                         struct net_device *dev)
 567 {
 568         unsigned int ioaddr = dev->base_addr;
 569         struct el3_private *priv = netdev_priv(dev);
 570         unsigned long flags;
 571 
 572         netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
 573                (long)skb->len, inw(ioaddr + EL3_STATUS));
 574 
 575         spin_lock_irqsave(&priv->lock, flags);
 576 
 577         dev->stats.tx_bytes += skb->len;
 578 
 579         /* Put out the doubleword header... */
 580         outw(skb->len, ioaddr + TX_FIFO);
 581         outw(0x00, ioaddr + TX_FIFO);
 582         /* ... and the packet rounded to a doubleword. */
 583         outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
 584 
 585         if (inw(ioaddr + TX_FREE) <= 1536) {
 586                 netif_stop_queue(dev);
 587                 /* Interrupt us when the FIFO has room for max-sized packet. */
 588                 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
 589         }
 590 
 591         pop_tx_status(dev);
 592         spin_unlock_irqrestore(&priv->lock, flags);
 593         dev_kfree_skb(skb);
 594 
 595         return NETDEV_TX_OK;
 596 }
 597 
 598 /* The EL3 interrupt handler. */
 599 static irqreturn_t el3_interrupt(int irq, void *dev_id)
 600 {
 601         struct net_device *dev = (struct net_device *) dev_id;
 602         struct el3_private *lp = netdev_priv(dev);
 603         unsigned int ioaddr;
 604         __u16 status;
 605         int i = 0, handled = 1;
 606 
 607         if (!netif_device_present(dev))
 608                 return IRQ_NONE;
 609 
 610         ioaddr = dev->base_addr;
 611 
 612         netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
 613 
 614         spin_lock(&lp->lock);
 615         while ((status = inw(ioaddr + EL3_STATUS)) &
 616         (IntLatch | RxComplete | StatsFull)) {
 617                 if ((status & 0xe000) != 0x2000) {
 618                         netdev_dbg(dev, "interrupt from dead card\n");
 619                         handled = 0;
 620                         break;
 621                 }
 622                 if (status & RxComplete)
 623                         el3_rx(dev);
 624                 if (status & TxAvailable) {
 625                         netdev_dbg(dev, "    TX room bit was handled.\n");
 626                         /* There's room in the FIFO for a full-sized packet. */
 627                         outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
 628                         netif_wake_queue(dev);
 629                 }
 630                 if (status & TxComplete)
 631                         pop_tx_status(dev);
 632                 if (status & (AdapterFailure | RxEarly | StatsFull)) {
 633                         /* Handle all uncommon interrupts. */
 634                         if (status & StatsFull)         /* Empty statistics. */
 635                                 update_stats(dev);
 636                         if (status & RxEarly) {
 637                                 /* Rx early is unused. */
 638                                 el3_rx(dev);
 639                                 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
 640                         }
 641                         if (status & AdapterFailure) {
 642                                 u16 fifo_diag;
 643                                 EL3WINDOW(4);
 644                                 fifo_diag = inw(ioaddr + 4);
 645                                 EL3WINDOW(1);
 646                                 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
 647                             fifo_diag);
 648                                 if (fifo_diag & 0x0400) {
 649                                         /* Tx overrun */
 650                                         tc589_wait_for_completion(dev, TxReset);
 651                                         outw(TxEnable, ioaddr + EL3_CMD);
 652                                 }
 653                                 if (fifo_diag & 0x2000) {
 654                                         /* Rx underrun */
 655                                         tc589_wait_for_completion(dev, RxReset);
 656                                         set_rx_mode(dev);
 657                                         outw(RxEnable, ioaddr + EL3_CMD);
 658                                 }
 659                                 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
 660                         }
 661                 }
 662                 if (++i > 10) {
 663                         netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
 664                                         status);
 665                         /* Clear all interrupts */
 666                         outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
 667                         break;
 668                 }
 669                 /* Acknowledge the IRQ. */
 670                 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
 671         }
 672         lp->last_irq = jiffies;
 673         spin_unlock(&lp->lock);
 674         netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
 675                         inw(ioaddr + EL3_STATUS));
 676         return IRQ_RETVAL(handled);
 677 }
 678 
 679 static void media_check(struct timer_list *t)
 680 {
 681         struct el3_private *lp = from_timer(lp, t, media);
 682         struct net_device *dev = lp->p_dev->priv;
 683         unsigned int ioaddr = dev->base_addr;
 684         u16 media, errs;
 685         unsigned long flags;
 686 
 687         if (!netif_device_present(dev))
 688                 goto reschedule;
 689 
 690         /* Check for pending interrupt with expired latency timer: with
 691          * this, we can limp along even if the interrupt is blocked
 692          */
 693         if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
 694         (inb(ioaddr + EL3_TIMER) == 0xff)) {
 695                 if (!lp->fast_poll)
 696                         netdev_warn(dev, "interrupt(s) dropped!\n");
 697 
 698                 local_irq_save(flags);
 699                 el3_interrupt(dev->irq, dev);
 700                 local_irq_restore(flags);
 701 
 702                 lp->fast_poll = HZ;
 703         }
 704         if (lp->fast_poll) {
 705                 lp->fast_poll--;
 706                 lp->media.expires = jiffies + HZ/100;
 707                 add_timer(&lp->media);
 708                 return;
 709         }
 710 
 711         /* lp->lock guards the EL3 window. Window should always be 1 except
 712          * when the lock is held
 713          */
 714 
 715         spin_lock_irqsave(&lp->lock, flags);
 716         EL3WINDOW(4);
 717         media = inw(ioaddr+WN4_MEDIA) & 0xc810;
 718 
 719         /* Ignore collisions unless we've had no irq's recently */
 720         if (time_before(jiffies, lp->last_irq + HZ)) {
 721                 media &= ~0x0010;
 722         } else {
 723                 /* Try harder to detect carrier errors */
 724                 EL3WINDOW(6);
 725                 outw(StatsDisable, ioaddr + EL3_CMD);
 726                 errs = inb(ioaddr + 0);
 727                 outw(StatsEnable, ioaddr + EL3_CMD);
 728                 dev->stats.tx_carrier_errors += errs;
 729                 if (errs || (lp->media_status & 0x0010))
 730                         media |= 0x0010;
 731         }
 732 
 733         if (media != lp->media_status) {
 734                 if ((media & lp->media_status & 0x8000) &&
 735                                 ((lp->media_status ^ media) & 0x0800))
 736                 netdev_info(dev, "%s link beat\n",
 737                                 (lp->media_status & 0x0800 ? "lost" : "found"));
 738                 else if ((media & lp->media_status & 0x4000) &&
 739                  ((lp->media_status ^ media) & 0x0010))
 740                 netdev_info(dev, "coax cable %s\n",
 741                                 (lp->media_status & 0x0010 ? "ok" : "problem"));
 742                 if (dev->if_port == 0) {
 743                         if (media & 0x8000) {
 744                                 if (media & 0x0800)
 745                                         netdev_info(dev, "flipped to 10baseT\n");
 746                                 else
 747                         tc589_set_xcvr(dev, 2);
 748                         } else if (media & 0x4000) {
 749                                 if (media & 0x0010)
 750                                         tc589_set_xcvr(dev, 1);
 751                                 else
 752                                         netdev_info(dev, "flipped to 10base2\n");
 753                         }
 754                 }
 755                 lp->media_status = media;
 756         }
 757 
 758         EL3WINDOW(1);
 759         spin_unlock_irqrestore(&lp->lock, flags);
 760 
 761 reschedule:
 762         lp->media.expires = jiffies + HZ;
 763         add_timer(&lp->media);
 764 }
 765 
 766 static struct net_device_stats *el3_get_stats(struct net_device *dev)
 767 {
 768         struct el3_private *lp = netdev_priv(dev);
 769         unsigned long flags;
 770         struct pcmcia_device *link = lp->p_dev;
 771 
 772         if (pcmcia_dev_present(link)) {
 773                 spin_lock_irqsave(&lp->lock, flags);
 774                 update_stats(dev);
 775                 spin_unlock_irqrestore(&lp->lock, flags);
 776         }
 777         return &dev->stats;
 778 }
 779 
 780 /* Update statistics.  We change to register window 6, so this should be run
 781 * single-threaded if the device is active. This is expected to be a rare
 782 * operation, and it's simpler for the rest of the driver to assume that
 783 * window 1 is always valid rather than use a special window-state variable.
 784 *
 785 * Caller must hold the lock for this
 786 */
 787 
 788 static void update_stats(struct net_device *dev)
 789 {
 790         unsigned int ioaddr = dev->base_addr;
 791 
 792         netdev_dbg(dev, "updating the statistics.\n");
 793         /* Turn off statistics updates while reading. */
 794         outw(StatsDisable, ioaddr + EL3_CMD);
 795         /* Switch to the stats window, and read everything. */
 796         EL3WINDOW(6);
 797         dev->stats.tx_carrier_errors    += inb(ioaddr + 0);
 798         dev->stats.tx_heartbeat_errors  += inb(ioaddr + 1);
 799         /* Multiple collisions. */
 800         inb(ioaddr + 2);
 801         dev->stats.collisions           += inb(ioaddr + 3);
 802         dev->stats.tx_window_errors             += inb(ioaddr + 4);
 803         dev->stats.rx_fifo_errors               += inb(ioaddr + 5);
 804         dev->stats.tx_packets           += inb(ioaddr + 6);
 805         /* Rx packets   */
 806         inb(ioaddr + 7);
 807         /* Tx deferrals */
 808         inb(ioaddr + 8);
 809         /* Rx octets */
 810         inw(ioaddr + 10);
 811         /* Tx octets */
 812         inw(ioaddr + 12);
 813 
 814         /* Back to window 1, and turn statistics back on. */
 815         EL3WINDOW(1);
 816         outw(StatsEnable, ioaddr + EL3_CMD);
 817 }
 818 
 819 static int el3_rx(struct net_device *dev)
 820 {
 821         unsigned int ioaddr = dev->base_addr;
 822         int worklimit = 32;
 823         short rx_status;
 824 
 825         netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
 826                inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
 827         while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
 828                     worklimit > 0) {
 829                 worklimit--;
 830                 if (rx_status & 0x4000) { /* Error, update stats. */
 831                         short error = rx_status & 0x3800;
 832                         dev->stats.rx_errors++;
 833                         switch (error) {
 834                         case 0x0000:
 835                                 dev->stats.rx_over_errors++;
 836                                 break;
 837                         case 0x0800:
 838                                 dev->stats.rx_length_errors++;
 839                                 break;
 840                         case 0x1000:
 841                                 dev->stats.rx_frame_errors++;
 842                                 break;
 843                         case 0x1800:
 844                                 dev->stats.rx_length_errors++;
 845                                 break;
 846                         case 0x2000:
 847                                 dev->stats.rx_frame_errors++;
 848                                 break;
 849                         case 0x2800:
 850                                 dev->stats.rx_crc_errors++;
 851                                 break;
 852                         }
 853                 } else {
 854                         short pkt_len = rx_status & 0x7ff;
 855                         struct sk_buff *skb;
 856 
 857                         skb = netdev_alloc_skb(dev, pkt_len + 5);
 858 
 859                         netdev_dbg(dev, "    Receiving packet size %d status %4.4x.\n",
 860                        pkt_len, rx_status);
 861                         if (skb != NULL) {
 862                                 skb_reserve(skb, 2);
 863                                 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
 864                         (pkt_len+3)>>2);
 865                                 skb->protocol = eth_type_trans(skb, dev);
 866                                 netif_rx(skb);
 867                                 dev->stats.rx_packets++;
 868                                 dev->stats.rx_bytes += pkt_len;
 869                         } else {
 870                                 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
 871                            pkt_len);
 872                                 dev->stats.rx_dropped++;
 873                         }
 874                 }
 875                 /* Pop the top of the Rx FIFO */
 876                 tc589_wait_for_completion(dev, RxDiscard);
 877         }
 878         if (worklimit == 0)
 879                 netdev_warn(dev, "too much work in el3_rx!\n");
 880         return 0;
 881 }
 882 
 883 static void set_rx_mode(struct net_device *dev)
 884 {
 885         unsigned int ioaddr = dev->base_addr;
 886         u16 opts = SetRxFilter | RxStation | RxBroadcast;
 887 
 888         if (dev->flags & IFF_PROMISC)
 889                 opts |= RxMulticast | RxProm;
 890         else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
 891                 opts |= RxMulticast;
 892         outw(opts, ioaddr + EL3_CMD);
 893 }
 894 
 895 static void set_multicast_list(struct net_device *dev)
 896 {
 897         struct el3_private *priv = netdev_priv(dev);
 898         unsigned long flags;
 899 
 900         spin_lock_irqsave(&priv->lock, flags);
 901         set_rx_mode(dev);
 902         spin_unlock_irqrestore(&priv->lock, flags);
 903 }
 904 
 905 static int el3_close(struct net_device *dev)
 906 {
 907         struct el3_private *lp = netdev_priv(dev);
 908         struct pcmcia_device *link = lp->p_dev;
 909         unsigned int ioaddr = dev->base_addr;
 910 
 911         dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
 912 
 913         if (pcmcia_dev_present(link)) {
 914                 /* Turn off statistics ASAP.  We update dev->stats below. */
 915                 outw(StatsDisable, ioaddr + EL3_CMD);
 916 
 917                 /* Disable the receiver and transmitter. */
 918                 outw(RxDisable, ioaddr + EL3_CMD);
 919                 outw(TxDisable, ioaddr + EL3_CMD);
 920 
 921                 if (dev->if_port == 2)
 922                         /* Turn off thinnet power.  Green! */
 923                         outw(StopCoax, ioaddr + EL3_CMD);
 924                 else if (dev->if_port == 1) {
 925                         /* Disable link beat and jabber */
 926                         EL3WINDOW(4);
 927                         outw(0, ioaddr + WN4_MEDIA);
 928                 }
 929 
 930                 /* Switching back to window 0 disables the IRQ. */
 931                 EL3WINDOW(0);
 932                 /* But we explicitly zero the IRQ line select anyway. */
 933                 outw(0x0f00, ioaddr + WN0_IRQ);
 934 
 935                 /* Check if the card still exists */
 936                 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
 937                         update_stats(dev);
 938         }
 939 
 940         link->open--;
 941         netif_stop_queue(dev);
 942         del_timer_sync(&lp->media);
 943 
 944         return 0;
 945 }
 946 
 947 static const struct pcmcia_device_id tc589_ids[] = {
 948         PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
 949         PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
 950         PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
 951         PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
 952         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
 953         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
 954         PCMCIA_DEVICE_NULL,
 955 };
 956 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
 957 
 958 static struct pcmcia_driver tc589_driver = {
 959         .owner          = THIS_MODULE,
 960         .name           = "3c589_cs",
 961         .probe          = tc589_probe,
 962         .remove         = tc589_detach,
 963         .id_table       = tc589_ids,
 964         .suspend        = tc589_suspend,
 965         .resume         = tc589_resume,
 966 };
 967 module_pcmcia_driver(tc589_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/3com/3c589_cs.c

DEFINITIONS
