Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/net/ethernet/3com/3c589_cs.c

  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(unsigned long arg);
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_change_mtu         = eth_change_mtu,
192         .ndo_set_mac_address    = eth_mac_addr,
193         .ndo_validate_addr      = eth_validate_addr,
194 };
195 
196 static int tc589_probe(struct pcmcia_device *link)
197 {
198         struct el3_private *lp;
199         struct net_device *dev;
200 
201         dev_dbg(&link->dev, "3c589_attach()\n");
202 
203         /* Create new ethernet device */
204         dev = alloc_etherdev(sizeof(struct el3_private));
205         if (!dev)
206                 return -ENOMEM;
207         lp = netdev_priv(dev);
208         link->priv = dev;
209         lp->p_dev = link;
210 
211         spin_lock_init(&lp->lock);
212         link->resource[0]->end = 16;
213         link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
214 
215         link->config_flags |= CONF_ENABLE_IRQ;
216         link->config_index = 1;
217 
218         dev->netdev_ops = &el3_netdev_ops;
219         dev->watchdog_timeo = TX_TIMEOUT;
220 
221         SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
222 
223         return tc589_config(link);
224 }
225 
226 static void tc589_detach(struct pcmcia_device *link)
227 {
228         struct net_device *dev = link->priv;
229 
230         dev_dbg(&link->dev, "3c589_detach\n");
231 
232         unregister_netdev(dev);
233 
234         tc589_release(link);
235 
236         free_netdev(dev);
237 } /* tc589_detach */
238 
239 static int tc589_config(struct pcmcia_device *link)
240 {
241         struct net_device *dev = link->priv;
242         __be16 *phys_addr;
243         int ret, i, j, multi = 0, fifo;
244         unsigned int ioaddr;
245         static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
246         u8 *buf;
247         size_t len;
248 
249         dev_dbg(&link->dev, "3c589_config\n");
250 
251         phys_addr = (__be16 *)dev->dev_addr;
252         /* Is this a 3c562? */
253         if (link->manf_id != MANFID_3COM)
254                 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
255         multi = (link->card_id == PRODID_3COM_3C562);
256 
257         link->io_lines = 16;
258 
259         /* For the 3c562, the base address must be xx00-xx7f */
260         for (i = j = 0; j < 0x400; j += 0x10) {
261                 if (multi && (j & 0x80))
262                         continue;
263                 link->resource[0]->start = j ^ 0x300;
264                 i = pcmcia_request_io(link);
265                 if (i == 0)
266                         break;
267         }
268         if (i != 0)
269                 goto failed;
270 
271         ret = pcmcia_request_irq(link, el3_interrupt);
272         if (ret)
273                 goto failed;
274 
275         ret = pcmcia_enable_device(link);
276         if (ret)
277                 goto failed;
278 
279         dev->irq = link->irq;
280         dev->base_addr = link->resource[0]->start;
281         ioaddr = dev->base_addr;
282         EL3WINDOW(0);
283 
284         /* The 3c589 has an extra EEPROM for configuration info, including
285          * the hardware address.  The 3c562 puts the address in the CIS.
286          */
287         len = pcmcia_get_tuple(link, 0x88, &buf);
288         if (buf && len >= 6) {
289                 for (i = 0; i < 3; i++)
290                         phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
291                 kfree(buf);
292         } else {
293                 kfree(buf); /* 0 < len < 6 */
294                 for (i = 0; i < 3; i++)
295                         phys_addr[i] = htons(read_eeprom(ioaddr, i));
296                 if (phys_addr[0] == htons(0x6060)) {
297                         dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
298                                         dev->base_addr, dev->base_addr+15);
299                         goto failed;
300                 }
301         }
302 
303         /* The address and resource configuration register aren't loaded from
304          * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version.
305          */
306 
307         outw(0x3f00, ioaddr + 8);
308         fifo = inl(ioaddr);
309 
310         /* The if_port symbol can be set when the module is loaded */
311         if ((if_port >= 0) && (if_port <= 3))
312                 dev->if_port = if_port;
313         else
314                 dev_err(&link->dev, "invalid if_port requested\n");
315 
316         SET_NETDEV_DEV(dev, &link->dev);
317 
318         if (register_netdev(dev) != 0) {
319                 dev_err(&link->dev, "register_netdev() failed\n");
320                 goto failed;
321         }
322 
323         netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
324                         (multi ? "562" : "589"), dev->base_addr, dev->irq,
325                         dev->dev_addr);
326         netdev_info(dev, "  %dK FIFO split %s Rx:Tx, %s xcvr\n",
327                         (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
328                         if_names[dev->if_port]);
329         return 0;
330 
331 failed:
332         tc589_release(link);
333         return -ENODEV;
334 } /* tc589_config */
335 
336 static void tc589_release(struct pcmcia_device *link)
337 {
338         pcmcia_disable_device(link);
339 }
340 
341 static int tc589_suspend(struct pcmcia_device *link)
342 {
343         struct net_device *dev = link->priv;
344 
345         if (link->open)
346                 netif_device_detach(dev);
347 
348         return 0;
349 }
350 
351 static int tc589_resume(struct pcmcia_device *link)
352 {
353         struct net_device *dev = link->priv;
354 
355         if (link->open) {
356                 tc589_reset(dev);
357                 netif_device_attach(dev);
358         }
359 
360         return 0;
361 }
362 
363 /*====================================================================*/
364 
365 /* Use this for commands that may take time to finish */
366 
367 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
368 {
369         int i = 100;
370         outw(cmd, dev->base_addr + EL3_CMD);
371         while (--i > 0)
372                 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000))
373                         break;
374         if (i == 0)
375                 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
376 }
377 
378 /* Read a word from the EEPROM using the regular EEPROM access register.
379  * Assume that we are in register window zero.
380  */
381 
382 static u16 read_eeprom(unsigned int ioaddr, int index)
383 {
384         int i;
385         outw(EEPROM_READ + index, ioaddr + 10);
386         /* Reading the eeprom takes 162 us */
387         for (i = 1620; i >= 0; i--)
388                 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
389                         break;
390         return inw(ioaddr + 12);
391 }
392 
393 /* Set transceiver type, perhaps to something other than what the user
394  * specified in dev->if_port.
395  */
396 
397 static void tc589_set_xcvr(struct net_device *dev, int if_port)
398 {
399         struct el3_private *lp = netdev_priv(dev);
400         unsigned int ioaddr = dev->base_addr;
401 
402         EL3WINDOW(0);
403         switch (if_port) {
404         case 0:
405         case 1:
406                 outw(0, ioaddr + 6);
407                 break;
408         case 2:
409                 outw(3<<14, ioaddr + 6);
410                 break;
411         case 3:
412                 outw(1<<14, ioaddr + 6);
413                 break;
414         }
415         /* On PCMCIA, this just turns on the LED */
416         outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
417         /* 10baseT interface, enable link beat and jabber check. */
418         EL3WINDOW(4);
419         outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
420         EL3WINDOW(1);
421         if (if_port == 2)
422                 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
423         else
424                 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
425 }
426 
427 static void dump_status(struct net_device *dev)
428 {
429         unsigned int ioaddr = dev->base_addr;
430         EL3WINDOW(1);
431         netdev_info(dev, "  irq status %04x, rx status %04x, tx status %02x  tx free %04x\n",
432                         inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
433                         inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
434         EL3WINDOW(4);
435         netdev_info(dev, "  diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
436                         inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
437                         inw(ioaddr+0x0a));
438         EL3WINDOW(1);
439 }
440 
441 /* Reset and restore all of the 3c589 registers. */
442 static void tc589_reset(struct net_device *dev)
443 {
444         unsigned int ioaddr = dev->base_addr;
445         int i;
446 
447         EL3WINDOW(0);
448         outw(0x0001, ioaddr + 4);                       /* Activate board. */
449         outw(0x3f00, ioaddr + 8);                       /* Set the IRQ line. */
450 
451         /* Set the station address in window 2. */
452         EL3WINDOW(2);
453         for (i = 0; i < 6; i++)
454                 outb(dev->dev_addr[i], ioaddr + i);
455 
456         tc589_set_xcvr(dev, dev->if_port);
457 
458         /* Switch to the stats window, and clear all stats by reading. */
459         outw(StatsDisable, ioaddr + EL3_CMD);
460         EL3WINDOW(6);
461         for (i = 0; i < 9; i++)
462                 inb(ioaddr+i);
463         inw(ioaddr + 10);
464         inw(ioaddr + 12);
465 
466         /* Switch to register set 1 for normal use. */
467         EL3WINDOW(1);
468 
469         set_rx_mode(dev);
470         outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
471         outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
472         outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
473         /* Allow status bits to be seen. */
474         outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
475         /* Ack all pending events, and set active indicator mask. */
476         outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
477          ioaddr + EL3_CMD);
478         outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
479          | AdapterFailure, ioaddr + EL3_CMD);
480 }
481 
482 static void netdev_get_drvinfo(struct net_device *dev,
483                                struct ethtool_drvinfo *info)
484 {
485         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
486         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
487         snprintf(info->bus_info, sizeof(info->bus_info),
488                 "PCMCIA 0x%lx", dev->base_addr);
489 }
490 
491 static const struct ethtool_ops netdev_ethtool_ops = {
492         .get_drvinfo            = netdev_get_drvinfo,
493 };
494 
495 static int el3_config(struct net_device *dev, struct ifmap *map)
496 {
497         if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
498                 if (map->port <= 3) {
499                         dev->if_port = map->port;
500                         netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
501                         tc589_set_xcvr(dev, dev->if_port);
502                 } else {
503                         return -EINVAL;
504                 }
505         }
506         return 0;
507 }
508 
509 static int el3_open(struct net_device *dev)
510 {
511         struct el3_private *lp = netdev_priv(dev);
512         struct pcmcia_device *link = lp->p_dev;
513 
514         if (!pcmcia_dev_present(link))
515                 return -ENODEV;
516 
517         link->open++;
518         netif_start_queue(dev);
519 
520         tc589_reset(dev);
521         init_timer(&lp->media);
522         lp->media.function = media_check;
523         lp->media.data = (unsigned long) dev;
524         lp->media.expires = jiffies + HZ;
525         add_timer(&lp->media);
526 
527         dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
528           dev->name, inw(dev->base_addr + EL3_STATUS));
529 
530         return 0;
531 }
532 
533 static void el3_tx_timeout(struct net_device *dev)
534 {
535         unsigned int ioaddr = dev->base_addr;
536 
537         netdev_warn(dev, "Transmit timed out!\n");
538         dump_status(dev);
539         dev->stats.tx_errors++;
540         dev->trans_start = jiffies; /* prevent tx timeout */
541         /* Issue TX_RESET and TX_START commands. */
542         tc589_wait_for_completion(dev, TxReset);
543         outw(TxEnable, ioaddr + EL3_CMD);
544         netif_wake_queue(dev);
545 }
546 
547 static void pop_tx_status(struct net_device *dev)
548 {
549         unsigned int ioaddr = dev->base_addr;
550         int i;
551 
552         /* Clear the Tx status stack. */
553         for (i = 32; i > 0; i--) {
554                 u_char tx_status = inb(ioaddr + TX_STATUS);
555                 if (!(tx_status & 0x84))
556                         break;
557                 /* reset transmitter on jabber error or underrun */
558                 if (tx_status & 0x30)
559                         tc589_wait_for_completion(dev, TxReset);
560                 if (tx_status & 0x38) {
561                         netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
562                         outw(TxEnable, ioaddr + EL3_CMD);
563                         dev->stats.tx_aborted_errors++;
564                 }
565                 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
566         }
567 }
568 
569 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
570                                         struct net_device *dev)
571 {
572         unsigned int ioaddr = dev->base_addr;
573         struct el3_private *priv = netdev_priv(dev);
574         unsigned long flags;
575 
576         netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
577                (long)skb->len, inw(ioaddr + EL3_STATUS));
578 
579         spin_lock_irqsave(&priv->lock, flags);
580 
581         dev->stats.tx_bytes += skb->len;
582 
583         /* Put out the doubleword header... */
584         outw(skb->len, ioaddr + TX_FIFO);
585         outw(0x00, ioaddr + TX_FIFO);
586         /* ... and the packet rounded to a doubleword. */
587         outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
588 
589         if (inw(ioaddr + TX_FREE) <= 1536) {
590                 netif_stop_queue(dev);
591                 /* Interrupt us when the FIFO has room for max-sized packet. */
592                 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
593         }
594 
595         pop_tx_status(dev);
596         spin_unlock_irqrestore(&priv->lock, flags);
597         dev_kfree_skb(skb);
598 
599         return NETDEV_TX_OK;
600 }
601 
602 /* The EL3 interrupt handler. */
603 static irqreturn_t el3_interrupt(int irq, void *dev_id)
604 {
605         struct net_device *dev = (struct net_device *) dev_id;
606         struct el3_private *lp = netdev_priv(dev);
607         unsigned int ioaddr;
608         __u16 status;
609         int i = 0, handled = 1;
610 
611         if (!netif_device_present(dev))
612                 return IRQ_NONE;
613 
614         ioaddr = dev->base_addr;
615 
616         netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
617 
618         spin_lock(&lp->lock);
619         while ((status = inw(ioaddr + EL3_STATUS)) &
620         (IntLatch | RxComplete | StatsFull)) {
621                 if ((status & 0xe000) != 0x2000) {
622                         netdev_dbg(dev, "interrupt from dead card\n");
623                         handled = 0;
624                         break;
625                 }
626                 if (status & RxComplete)
627                         el3_rx(dev);
628                 if (status & TxAvailable) {
629                         netdev_dbg(dev, "    TX room bit was handled.\n");
630                         /* There's room in the FIFO for a full-sized packet. */
631                         outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
632                         netif_wake_queue(dev);
633                 }
634                 if (status & TxComplete)
635                         pop_tx_status(dev);
636                 if (status & (AdapterFailure | RxEarly | StatsFull)) {
637                         /* Handle all uncommon interrupts. */
638                         if (status & StatsFull)         /* Empty statistics. */
639                                 update_stats(dev);
640                         if (status & RxEarly) {
641                                 /* Rx early is unused. */
642                                 el3_rx(dev);
643                                 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
644                         }
645                         if (status & AdapterFailure) {
646                                 u16 fifo_diag;
647                                 EL3WINDOW(4);
648                                 fifo_diag = inw(ioaddr + 4);
649                                 EL3WINDOW(1);
650                                 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
651                             fifo_diag);
652                                 if (fifo_diag & 0x0400) {
653                                         /* Tx overrun */
654                                         tc589_wait_for_completion(dev, TxReset);
655                                         outw(TxEnable, ioaddr + EL3_CMD);
656                                 }
657                                 if (fifo_diag & 0x2000) {
658                                         /* Rx underrun */
659                                         tc589_wait_for_completion(dev, RxReset);
660                                         set_rx_mode(dev);
661                                         outw(RxEnable, ioaddr + EL3_CMD);
662                                 }
663                                 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
664                         }
665                 }
666                 if (++i > 10) {
667                         netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
668                                         status);
669                         /* Clear all interrupts */
670                         outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
671                         break;
672                 }
673                 /* Acknowledge the IRQ. */
674                 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
675         }
676         lp->last_irq = jiffies;
677         spin_unlock(&lp->lock);
678         netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
679                         inw(ioaddr + EL3_STATUS));
680         return IRQ_RETVAL(handled);
681 }
682 
683 static void media_check(unsigned long arg)
684 {
685         struct net_device *dev = (struct net_device *)(arg);
686         struct el3_private *lp = netdev_priv(dev);
687         unsigned int ioaddr = dev->base_addr;
688         u16 media, errs;
689         unsigned long flags;
690 
691         if (!netif_device_present(dev))
692                 goto reschedule;
693 
694         /* Check for pending interrupt with expired latency timer: with
695          * this, we can limp along even if the interrupt is blocked
696          */
697         if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
698         (inb(ioaddr + EL3_TIMER) == 0xff)) {
699                 if (!lp->fast_poll)
700                         netdev_warn(dev, "interrupt(s) dropped!\n");
701 
702                 local_irq_save(flags);
703                 el3_interrupt(dev->irq, dev);
704                 local_irq_restore(flags);
705 
706                 lp->fast_poll = HZ;
707         }
708         if (lp->fast_poll) {
709                 lp->fast_poll--;
710                 lp->media.expires = jiffies + HZ/100;
711                 add_timer(&lp->media);
712                 return;
713         }
714 
715         /* lp->lock guards the EL3 window. Window should always be 1 except
716          * when the lock is held
717          */
718 
719         spin_lock_irqsave(&lp->lock, flags);
720         EL3WINDOW(4);
721         media = inw(ioaddr+WN4_MEDIA) & 0xc810;
722 
723         /* Ignore collisions unless we've had no irq's recently */
724         if (time_before(jiffies, lp->last_irq + HZ)) {
725                 media &= ~0x0010;
726         } else {
727                 /* Try harder to detect carrier errors */
728                 EL3WINDOW(6);
729                 outw(StatsDisable, ioaddr + EL3_CMD);
730                 errs = inb(ioaddr + 0);
731                 outw(StatsEnable, ioaddr + EL3_CMD);
732                 dev->stats.tx_carrier_errors += errs;
733                 if (errs || (lp->media_status & 0x0010))
734                         media |= 0x0010;
735         }
736 
737         if (media != lp->media_status) {
738                 if ((media & lp->media_status & 0x8000) &&
739                                 ((lp->media_status ^ media) & 0x0800))
740                 netdev_info(dev, "%s link beat\n",
741                                 (lp->media_status & 0x0800 ? "lost" : "found"));
742                 else if ((media & lp->media_status & 0x4000) &&
743                  ((lp->media_status ^ media) & 0x0010))
744                 netdev_info(dev, "coax cable %s\n",
745                                 (lp->media_status & 0x0010 ? "ok" : "problem"));
746                 if (dev->if_port == 0) {
747                         if (media & 0x8000) {
748                                 if (media & 0x0800)
749                                         netdev_info(dev, "flipped to 10baseT\n");
750                                 else
751                         tc589_set_xcvr(dev, 2);
752                         } else if (media & 0x4000) {
753                                 if (media & 0x0010)
754                                         tc589_set_xcvr(dev, 1);
755                                 else
756                                         netdev_info(dev, "flipped to 10base2\n");
757                         }
758                 }
759                 lp->media_status = media;
760         }
761 
762         EL3WINDOW(1);
763         spin_unlock_irqrestore(&lp->lock, flags);
764 
765 reschedule:
766         lp->media.expires = jiffies + HZ;
767         add_timer(&lp->media);
768 }
769 
770 static struct net_device_stats *el3_get_stats(struct net_device *dev)
771 {
772         struct el3_private *lp = netdev_priv(dev);
773         unsigned long flags;
774         struct pcmcia_device *link = lp->p_dev;
775 
776         if (pcmcia_dev_present(link)) {
777                 spin_lock_irqsave(&lp->lock, flags);
778                 update_stats(dev);
779                 spin_unlock_irqrestore(&lp->lock, flags);
780         }
781         return &dev->stats;
782 }
783 
784 /* Update statistics.  We change to register window 6, so this should be run
785 * single-threaded if the device is active. This is expected to be a rare
786 * operation, and it's simpler for the rest of the driver to assume that
787 * window 1 is always valid rather than use a special window-state variable.
788 *
789 * Caller must hold the lock for this
790 */
791 
792 static void update_stats(struct net_device *dev)
793 {
794         unsigned int ioaddr = dev->base_addr;
795 
796         netdev_dbg(dev, "updating the statistics.\n");
797         /* Turn off statistics updates while reading. */
798         outw(StatsDisable, ioaddr + EL3_CMD);
799         /* Switch to the stats window, and read everything. */
800         EL3WINDOW(6);
801         dev->stats.tx_carrier_errors    += inb(ioaddr + 0);
802         dev->stats.tx_heartbeat_errors  += inb(ioaddr + 1);
803         /* Multiple collisions. */
804         inb(ioaddr + 2);
805         dev->stats.collisions           += inb(ioaddr + 3);
806         dev->stats.tx_window_errors             += inb(ioaddr + 4);
807         dev->stats.rx_fifo_errors               += inb(ioaddr + 5);
808         dev->stats.tx_packets           += inb(ioaddr + 6);
809         /* Rx packets   */
810         inb(ioaddr + 7);
811         /* Tx deferrals */
812         inb(ioaddr + 8);
813         /* Rx octets */
814         inw(ioaddr + 10);
815         /* Tx octets */
816         inw(ioaddr + 12);
817 
818         /* Back to window 1, and turn statistics back on. */
819         EL3WINDOW(1);
820         outw(StatsEnable, ioaddr + EL3_CMD);
821 }
822 
823 static int el3_rx(struct net_device *dev)
824 {
825         unsigned int ioaddr = dev->base_addr;
826         int worklimit = 32;
827         short rx_status;
828 
829         netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
830                inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
831         while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
832                     worklimit > 0) {
833                 worklimit--;
834                 if (rx_status & 0x4000) { /* Error, update stats. */
835                         short error = rx_status & 0x3800;
836                         dev->stats.rx_errors++;
837                         switch (error) {
838                         case 0x0000:
839                                 dev->stats.rx_over_errors++;
840                                 break;
841                         case 0x0800:
842                                 dev->stats.rx_length_errors++;
843                                 break;
844                         case 0x1000:
845                                 dev->stats.rx_frame_errors++;
846                                 break;
847                         case 0x1800:
848                                 dev->stats.rx_length_errors++;
849                                 break;
850                         case 0x2000:
851                                 dev->stats.rx_frame_errors++;
852                                 break;
853                         case 0x2800:
854                                 dev->stats.rx_crc_errors++;
855                                 break;
856                         }
857                 } else {
858                         short pkt_len = rx_status & 0x7ff;
859                         struct sk_buff *skb;
860 
861                         skb = netdev_alloc_skb(dev, pkt_len + 5);
862 
863                         netdev_dbg(dev, "    Receiving packet size %d status %4.4x.\n",
864                        pkt_len, rx_status);
865                         if (skb != NULL) {
866                                 skb_reserve(skb, 2);
867                                 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
868                         (pkt_len+3)>>2);
869                                 skb->protocol = eth_type_trans(skb, dev);
870                                 netif_rx(skb);
871                                 dev->stats.rx_packets++;
872                                 dev->stats.rx_bytes += pkt_len;
873                         } else {
874                                 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
875                            pkt_len);
876                                 dev->stats.rx_dropped++;
877                         }
878                 }
879                 /* Pop the top of the Rx FIFO */
880                 tc589_wait_for_completion(dev, RxDiscard);
881         }
882         if (worklimit == 0)
883                 netdev_warn(dev, "too much work in el3_rx!\n");
884         return 0;
885 }
886 
887 static void set_rx_mode(struct net_device *dev)
888 {
889         unsigned int ioaddr = dev->base_addr;
890         u16 opts = SetRxFilter | RxStation | RxBroadcast;
891 
892         if (dev->flags & IFF_PROMISC)
893                 opts |= RxMulticast | RxProm;
894         else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
895                 opts |= RxMulticast;
896         outw(opts, ioaddr + EL3_CMD);
897 }
898 
899 static void set_multicast_list(struct net_device *dev)
900 {
901         struct el3_private *priv = netdev_priv(dev);
902         unsigned long flags;
903 
904         spin_lock_irqsave(&priv->lock, flags);
905         set_rx_mode(dev);
906         spin_unlock_irqrestore(&priv->lock, flags);
907 }
908 
909 static int el3_close(struct net_device *dev)
910 {
911         struct el3_private *lp = netdev_priv(dev);
912         struct pcmcia_device *link = lp->p_dev;
913         unsigned int ioaddr = dev->base_addr;
914 
915         dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
916 
917         if (pcmcia_dev_present(link)) {
918                 /* Turn off statistics ASAP.  We update dev->stats below. */
919                 outw(StatsDisable, ioaddr + EL3_CMD);
920 
921                 /* Disable the receiver and transmitter. */
922                 outw(RxDisable, ioaddr + EL3_CMD);
923                 outw(TxDisable, ioaddr + EL3_CMD);
924 
925                 if (dev->if_port == 2)
926                         /* Turn off thinnet power.  Green! */
927                         outw(StopCoax, ioaddr + EL3_CMD);
928                 else if (dev->if_port == 1) {
929                         /* Disable link beat and jabber */
930                         EL3WINDOW(4);
931                         outw(0, ioaddr + WN4_MEDIA);
932                 }
933 
934                 /* Switching back to window 0 disables the IRQ. */
935                 EL3WINDOW(0);
936                 /* But we explicitly zero the IRQ line select anyway. */
937                 outw(0x0f00, ioaddr + WN0_IRQ);
938 
939                 /* Check if the card still exists */
940                 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
941                         update_stats(dev);
942         }
943 
944         link->open--;
945         netif_stop_queue(dev);
946         del_timer_sync(&lp->media);
947 
948         return 0;
949 }
950 
951 static const struct pcmcia_device_id tc589_ids[] = {
952         PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
953         PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
954         PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
955         PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
956         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
957         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
958         PCMCIA_DEVICE_NULL,
959 };
960 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
961 
962 static struct pcmcia_driver tc589_driver = {
963         .owner          = THIS_MODULE,
964         .name           = "3c589_cs",
965         .probe          = tc589_probe,
966         .remove         = tc589_detach,
967         .id_table       = tc589_ids,
968         .suspend        = tc589_suspend,
969         .resume         = tc589_resume,
970 };
971 module_pcmcia_driver(tc589_driver);
972 

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