Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

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_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         setup_timer(&lp->media, media_check, (unsigned long)dev);
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(unsigned long arg)
680 {
681         struct net_device *dev = (struct net_device *)(arg);
682         struct el3_private *lp = netdev_priv(dev);
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);
968 

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