Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

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         dev->ethtool_ops = &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         setup_timer(&lp->media, media_check, (unsigned long)dev);
522         mod_timer(&lp->media, jiffies + HZ);
523 
524         dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
525           dev->name, inw(dev->base_addr + EL3_STATUS));
526 
527         return 0;
528 }
529 
530 static void el3_tx_timeout(struct net_device *dev)
531 {
532         unsigned int ioaddr = dev->base_addr;
533 
534         netdev_warn(dev, "Transmit timed out!\n");
535         dump_status(dev);
536         dev->stats.tx_errors++;
537         dev->trans_start = jiffies; /* prevent tx timeout */
538         /* Issue TX_RESET and TX_START commands. */
539         tc589_wait_for_completion(dev, TxReset);
540         outw(TxEnable, ioaddr + EL3_CMD);
541         netif_wake_queue(dev);
542 }
543 
544 static void pop_tx_status(struct net_device *dev)
545 {
546         unsigned int ioaddr = dev->base_addr;
547         int i;
548 
549         /* Clear the Tx status stack. */
550         for (i = 32; i > 0; i--) {
551                 u_char tx_status = inb(ioaddr + TX_STATUS);
552                 if (!(tx_status & 0x84))
553                         break;
554                 /* reset transmitter on jabber error or underrun */
555                 if (tx_status & 0x30)
556                         tc589_wait_for_completion(dev, TxReset);
557                 if (tx_status & 0x38) {
558                         netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
559                         outw(TxEnable, ioaddr + EL3_CMD);
560                         dev->stats.tx_aborted_errors++;
561                 }
562                 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
563         }
564 }
565 
566 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
567                                         struct net_device *dev)
568 {
569         unsigned int ioaddr = dev->base_addr;
570         struct el3_private *priv = netdev_priv(dev);
571         unsigned long flags;
572 
573         netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
574                (long)skb->len, inw(ioaddr + EL3_STATUS));
575 
576         spin_lock_irqsave(&priv->lock, flags);
577 
578         dev->stats.tx_bytes += skb->len;
579 
580         /* Put out the doubleword header... */
581         outw(skb->len, ioaddr + TX_FIFO);
582         outw(0x00, ioaddr + TX_FIFO);
583         /* ... and the packet rounded to a doubleword. */
584         outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
585 
586         if (inw(ioaddr + TX_FREE) <= 1536) {
587                 netif_stop_queue(dev);
588                 /* Interrupt us when the FIFO has room for max-sized packet. */
589                 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
590         }
591 
592         pop_tx_status(dev);
593         spin_unlock_irqrestore(&priv->lock, flags);
594         dev_kfree_skb(skb);
595 
596         return NETDEV_TX_OK;
597 }
598 
599 /* The EL3 interrupt handler. */
600 static irqreturn_t el3_interrupt(int irq, void *dev_id)
601 {
602         struct net_device *dev = (struct net_device *) dev_id;
603         struct el3_private *lp = netdev_priv(dev);
604         unsigned int ioaddr;
605         __u16 status;
606         int i = 0, handled = 1;
607 
608         if (!netif_device_present(dev))
609                 return IRQ_NONE;
610 
611         ioaddr = dev->base_addr;
612 
613         netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
614 
615         spin_lock(&lp->lock);
616         while ((status = inw(ioaddr + EL3_STATUS)) &
617         (IntLatch | RxComplete | StatsFull)) {
618                 if ((status & 0xe000) != 0x2000) {
619                         netdev_dbg(dev, "interrupt from dead card\n");
620                         handled = 0;
621                         break;
622                 }
623                 if (status & RxComplete)
624                         el3_rx(dev);
625                 if (status & TxAvailable) {
626                         netdev_dbg(dev, "    TX room bit was handled.\n");
627                         /* There's room in the FIFO for a full-sized packet. */
628                         outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
629                         netif_wake_queue(dev);
630                 }
631                 if (status & TxComplete)
632                         pop_tx_status(dev);
633                 if (status & (AdapterFailure | RxEarly | StatsFull)) {
634                         /* Handle all uncommon interrupts. */
635                         if (status & StatsFull)         /* Empty statistics. */
636                                 update_stats(dev);
637                         if (status & RxEarly) {
638                                 /* Rx early is unused. */
639                                 el3_rx(dev);
640                                 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
641                         }
642                         if (status & AdapterFailure) {
643                                 u16 fifo_diag;
644                                 EL3WINDOW(4);
645                                 fifo_diag = inw(ioaddr + 4);
646                                 EL3WINDOW(1);
647                                 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
648                             fifo_diag);
649                                 if (fifo_diag & 0x0400) {
650                                         /* Tx overrun */
651                                         tc589_wait_for_completion(dev, TxReset);
652                                         outw(TxEnable, ioaddr + EL3_CMD);
653                                 }
654                                 if (fifo_diag & 0x2000) {
655                                         /* Rx underrun */
656                                         tc589_wait_for_completion(dev, RxReset);
657                                         set_rx_mode(dev);
658                                         outw(RxEnable, ioaddr + EL3_CMD);
659                                 }
660                                 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
661                         }
662                 }
663                 if (++i > 10) {
664                         netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
665                                         status);
666                         /* Clear all interrupts */
667                         outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
668                         break;
669                 }
670                 /* Acknowledge the IRQ. */
671                 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
672         }
673         lp->last_irq = jiffies;
674         spin_unlock(&lp->lock);
675         netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
676                         inw(ioaddr + EL3_STATUS));
677         return IRQ_RETVAL(handled);
678 }
679 
680 static void media_check(unsigned long arg)
681 {
682         struct net_device *dev = (struct net_device *)(arg);
683         struct el3_private *lp = netdev_priv(dev);
684         unsigned int ioaddr = dev->base_addr;
685         u16 media, errs;
686         unsigned long flags;
687 
688         if (!netif_device_present(dev))
689                 goto reschedule;
690 
691         /* Check for pending interrupt with expired latency timer: with
692          * this, we can limp along even if the interrupt is blocked
693          */
694         if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
695         (inb(ioaddr + EL3_TIMER) == 0xff)) {
696                 if (!lp->fast_poll)
697                         netdev_warn(dev, "interrupt(s) dropped!\n");
698 
699                 local_irq_save(flags);
700                 el3_interrupt(dev->irq, dev);
701                 local_irq_restore(flags);
702 
703                 lp->fast_poll = HZ;
704         }
705         if (lp->fast_poll) {
706                 lp->fast_poll--;
707                 lp->media.expires = jiffies + HZ/100;
708                 add_timer(&lp->media);
709                 return;
710         }
711 
712         /* lp->lock guards the EL3 window. Window should always be 1 except
713          * when the lock is held
714          */
715 
716         spin_lock_irqsave(&lp->lock, flags);
717         EL3WINDOW(4);
718         media = inw(ioaddr+WN4_MEDIA) & 0xc810;
719 
720         /* Ignore collisions unless we've had no irq's recently */
721         if (time_before(jiffies, lp->last_irq + HZ)) {
722                 media &= ~0x0010;
723         } else {
724                 /* Try harder to detect carrier errors */
725                 EL3WINDOW(6);
726                 outw(StatsDisable, ioaddr + EL3_CMD);
727                 errs = inb(ioaddr + 0);
728                 outw(StatsEnable, ioaddr + EL3_CMD);
729                 dev->stats.tx_carrier_errors += errs;
730                 if (errs || (lp->media_status & 0x0010))
731                         media |= 0x0010;
732         }
733 
734         if (media != lp->media_status) {
735                 if ((media & lp->media_status & 0x8000) &&
736                                 ((lp->media_status ^ media) & 0x0800))
737                 netdev_info(dev, "%s link beat\n",
738                                 (lp->media_status & 0x0800 ? "lost" : "found"));
739                 else if ((media & lp->media_status & 0x4000) &&
740                  ((lp->media_status ^ media) & 0x0010))
741                 netdev_info(dev, "coax cable %s\n",
742                                 (lp->media_status & 0x0010 ? "ok" : "problem"));
743                 if (dev->if_port == 0) {
744                         if (media & 0x8000) {
745                                 if (media & 0x0800)
746                                         netdev_info(dev, "flipped to 10baseT\n");
747                                 else
748                         tc589_set_xcvr(dev, 2);
749                         } else if (media & 0x4000) {
750                                 if (media & 0x0010)
751                                         tc589_set_xcvr(dev, 1);
752                                 else
753                                         netdev_info(dev, "flipped to 10base2\n");
754                         }
755                 }
756                 lp->media_status = media;
757         }
758 
759         EL3WINDOW(1);
760         spin_unlock_irqrestore(&lp->lock, flags);
761 
762 reschedule:
763         lp->media.expires = jiffies + HZ;
764         add_timer(&lp->media);
765 }
766 
767 static struct net_device_stats *el3_get_stats(struct net_device *dev)
768 {
769         struct el3_private *lp = netdev_priv(dev);
770         unsigned long flags;
771         struct pcmcia_device *link = lp->p_dev;
772 
773         if (pcmcia_dev_present(link)) {
774                 spin_lock_irqsave(&lp->lock, flags);
775                 update_stats(dev);
776                 spin_unlock_irqrestore(&lp->lock, flags);
777         }
778         return &dev->stats;
779 }
780 
781 /* Update statistics.  We change to register window 6, so this should be run
782 * single-threaded if the device is active. This is expected to be a rare
783 * operation, and it's simpler for the rest of the driver to assume that
784 * window 1 is always valid rather than use a special window-state variable.
785 *
786 * Caller must hold the lock for this
787 */
788 
789 static void update_stats(struct net_device *dev)
790 {
791         unsigned int ioaddr = dev->base_addr;
792 
793         netdev_dbg(dev, "updating the statistics.\n");
794         /* Turn off statistics updates while reading. */
795         outw(StatsDisable, ioaddr + EL3_CMD);
796         /* Switch to the stats window, and read everything. */
797         EL3WINDOW(6);
798         dev->stats.tx_carrier_errors    += inb(ioaddr + 0);
799         dev->stats.tx_heartbeat_errors  += inb(ioaddr + 1);
800         /* Multiple collisions. */
801         inb(ioaddr + 2);
802         dev->stats.collisions           += inb(ioaddr + 3);
803         dev->stats.tx_window_errors             += inb(ioaddr + 4);
804         dev->stats.rx_fifo_errors               += inb(ioaddr + 5);
805         dev->stats.tx_packets           += inb(ioaddr + 6);
806         /* Rx packets   */
807         inb(ioaddr + 7);
808         /* Tx deferrals */
809         inb(ioaddr + 8);
810         /* Rx octets */
811         inw(ioaddr + 10);
812         /* Tx octets */
813         inw(ioaddr + 12);
814 
815         /* Back to window 1, and turn statistics back on. */
816         EL3WINDOW(1);
817         outw(StatsEnable, ioaddr + EL3_CMD);
818 }
819 
820 static int el3_rx(struct net_device *dev)
821 {
822         unsigned int ioaddr = dev->base_addr;
823         int worklimit = 32;
824         short rx_status;
825 
826         netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
827                inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
828         while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
829                     worklimit > 0) {
830                 worklimit--;
831                 if (rx_status & 0x4000) { /* Error, update stats. */
832                         short error = rx_status & 0x3800;
833                         dev->stats.rx_errors++;
834                         switch (error) {
835                         case 0x0000:
836                                 dev->stats.rx_over_errors++;
837                                 break;
838                         case 0x0800:
839                                 dev->stats.rx_length_errors++;
840                                 break;
841                         case 0x1000:
842                                 dev->stats.rx_frame_errors++;
843                                 break;
844                         case 0x1800:
845                                 dev->stats.rx_length_errors++;
846                                 break;
847                         case 0x2000:
848                                 dev->stats.rx_frame_errors++;
849                                 break;
850                         case 0x2800:
851                                 dev->stats.rx_crc_errors++;
852                                 break;
853                         }
854                 } else {
855                         short pkt_len = rx_status & 0x7ff;
856                         struct sk_buff *skb;
857 
858                         skb = netdev_alloc_skb(dev, pkt_len + 5);
859 
860                         netdev_dbg(dev, "    Receiving packet size %d status %4.4x.\n",
861                        pkt_len, rx_status);
862                         if (skb != NULL) {
863                                 skb_reserve(skb, 2);
864                                 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
865                         (pkt_len+3)>>2);
866                                 skb->protocol = eth_type_trans(skb, dev);
867                                 netif_rx(skb);
868                                 dev->stats.rx_packets++;
869                                 dev->stats.rx_bytes += pkt_len;
870                         } else {
871                                 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
872                            pkt_len);
873                                 dev->stats.rx_dropped++;
874                         }
875                 }
876                 /* Pop the top of the Rx FIFO */
877                 tc589_wait_for_completion(dev, RxDiscard);
878         }
879         if (worklimit == 0)
880                 netdev_warn(dev, "too much work in el3_rx!\n");
881         return 0;
882 }
883 
884 static void set_rx_mode(struct net_device *dev)
885 {
886         unsigned int ioaddr = dev->base_addr;
887         u16 opts = SetRxFilter | RxStation | RxBroadcast;
888 
889         if (dev->flags & IFF_PROMISC)
890                 opts |= RxMulticast | RxProm;
891         else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
892                 opts |= RxMulticast;
893         outw(opts, ioaddr + EL3_CMD);
894 }
895 
896 static void set_multicast_list(struct net_device *dev)
897 {
898         struct el3_private *priv = netdev_priv(dev);
899         unsigned long flags;
900 
901         spin_lock_irqsave(&priv->lock, flags);
902         set_rx_mode(dev);
903         spin_unlock_irqrestore(&priv->lock, flags);
904 }
905 
906 static int el3_close(struct net_device *dev)
907 {
908         struct el3_private *lp = netdev_priv(dev);
909         struct pcmcia_device *link = lp->p_dev;
910         unsigned int ioaddr = dev->base_addr;
911 
912         dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
913 
914         if (pcmcia_dev_present(link)) {
915                 /* Turn off statistics ASAP.  We update dev->stats below. */
916                 outw(StatsDisable, ioaddr + EL3_CMD);
917 
918                 /* Disable the receiver and transmitter. */
919                 outw(RxDisable, ioaddr + EL3_CMD);
920                 outw(TxDisable, ioaddr + EL3_CMD);
921 
922                 if (dev->if_port == 2)
923                         /* Turn off thinnet power.  Green! */
924                         outw(StopCoax, ioaddr + EL3_CMD);
925                 else if (dev->if_port == 1) {
926                         /* Disable link beat and jabber */
927                         EL3WINDOW(4);
928                         outw(0, ioaddr + WN4_MEDIA);
929                 }
930 
931                 /* Switching back to window 0 disables the IRQ. */
932                 EL3WINDOW(0);
933                 /* But we explicitly zero the IRQ line select anyway. */
934                 outw(0x0f00, ioaddr + WN0_IRQ);
935 
936                 /* Check if the card still exists */
937                 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
938                         update_stats(dev);
939         }
940 
941         link->open--;
942         netif_stop_queue(dev);
943         del_timer_sync(&lp->media);
944 
945         return 0;
946 }
947 
948 static const struct pcmcia_device_id tc589_ids[] = {
949         PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
950         PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
951         PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
952         PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
953         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
954         PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
955         PCMCIA_DEVICE_NULL,
956 };
957 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
958 
959 static struct pcmcia_driver tc589_driver = {
960         .owner          = THIS_MODULE,
961         .name           = "3c589_cs",
962         .probe          = tc589_probe,
963         .remove         = tc589_detach,
964         .id_table       = tc589_ids,
965         .suspend        = tc589_suspend,
966         .resume         = tc589_resume,
967 };
968 module_pcmcia_driver(tc589_driver);
969 

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