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Linux/drivers/net/ethernet/3com/3c509.c

  1 /* 3c509.c: A 3c509 EtherLink3 ethernet driver for linux. */
  2 /*
  3         Written 1993-2000 by Donald Becker.
  4 
  5         Copyright 1994-2000 by Donald Becker.
  6         Copyright 1993 United States Government as represented by the
  7         Director, National Security Agency.      This software may be used and
  8         distributed according to the terms of the GNU General Public License,
  9         incorporated herein by reference.
 10 
 11         This driver is for the 3Com EtherLinkIII series.
 12 
 13         The author may be reached as becker@scyld.com, or C/O
 14         Scyld Computing Corporation
 15         410 Severn Ave., Suite 210
 16         Annapolis MD 21403
 17 
 18         Known limitations:
 19         Because of the way 3c509 ISA detection works it's difficult to predict
 20         a priori which of several ISA-mode cards will be detected first.
 21 
 22         This driver does not use predictive interrupt mode, resulting in higher
 23         packet latency but lower overhead.  If interrupts are disabled for an
 24         unusually long time it could also result in missed packets, but in
 25         practice this rarely happens.
 26 
 27 
 28         FIXES:
 29                 Alan Cox:       Removed the 'Unexpected interrupt' bug.
 30                 Michael Meskes: Upgraded to Donald Becker's version 1.07.
 31                 Alan Cox:       Increased the eeprom delay. Regardless of
 32                                 what the docs say some people definitely
 33                                 get problems with lower (but in card spec)
 34                                 delays
 35                 v1.10 4/21/97 Fixed module code so that multiple cards may be detected,
 36                                 other cleanups.  -djb
 37                 Andrea Arcangeli:       Upgraded to Donald Becker's version 1.12.
 38                 Rick Payne:     Fixed SMP race condition
 39                 v1.13 9/8/97 Made 'max_interrupt_work' an insmod-settable variable -djb
 40                 v1.14 10/15/97 Avoided waiting..discard message for fast machines -djb
 41                 v1.15 1/31/98 Faster recovery for Tx errors. -djb
 42                 v1.16 2/3/98 Different ID port handling to avoid sound cards. -djb
 43                 v1.18 12Mar2001 Andrew Morton
 44                         - Avoid bogus detect of 3c590's (Andrzej Krzysztofowicz)
 45                         - Reviewed against 1.18 from scyld.com
 46                 v1.18a 17Nov2001 Jeff Garzik <jgarzik@pobox.com>
 47                         - ethtool support
 48                 v1.18b 1Mar2002 Zwane Mwaikambo <zwane@commfireservices.com>
 49                         - Power Management support
 50                 v1.18c 1Mar2002 David Ruggiero <jdr@farfalle.com>
 51                         - Full duplex support
 52                 v1.19  16Oct2002 Zwane Mwaikambo <zwane@linuxpower.ca>
 53                         - Additional ethtool features
 54                 v1.19a 28Oct2002 Davud Ruggiero <jdr@farfalle.com>
 55                         - Increase *read_eeprom udelay to workaround oops with 2 cards.
 56                 v1.19b 08Nov2002 Marc Zyngier <maz@wild-wind.fr.eu.org>
 57                         - Introduce driver model for EISA cards.
 58                 v1.20  04Feb2008 Ondrej Zary <linux@rainbow-software.org>
 59                         - convert to isa_driver and pnp_driver and some cleanups
 60 */
 61 
 62 #define DRV_NAME        "3c509"
 63 #define DRV_VERSION     "1.20"
 64 #define DRV_RELDATE     "04Feb2008"
 65 
 66 /* A few values that may be tweaked. */
 67 
 68 /* Time in jiffies before concluding the transmitter is hung. */
 69 #define TX_TIMEOUT  (400*HZ/1000)
 70 
 71 #include <linux/module.h>
 72 #include <linux/isa.h>
 73 #include <linux/pnp.h>
 74 #include <linux/string.h>
 75 #include <linux/interrupt.h>
 76 #include <linux/errno.h>
 77 #include <linux/in.h>
 78 #include <linux/ioport.h>
 79 #include <linux/init.h>
 80 #include <linux/netdevice.h>
 81 #include <linux/etherdevice.h>
 82 #include <linux/pm.h>
 83 #include <linux/skbuff.h>
 84 #include <linux/delay.h>        /* for udelay() */
 85 #include <linux/spinlock.h>
 86 #include <linux/ethtool.h>
 87 #include <linux/device.h>
 88 #include <linux/eisa.h>
 89 #include <linux/bitops.h>
 90 
 91 #include <linux/uaccess.h>
 92 #include <asm/io.h>
 93 #include <asm/irq.h>
 94 
 95 static char version[] = DRV_NAME ".c:" DRV_VERSION " " DRV_RELDATE " becker@scyld.com\n";
 96 
 97 #ifdef EL3_DEBUG
 98 static int el3_debug = EL3_DEBUG;
 99 #else
100 static int el3_debug = 2;
101 #endif
102 
103 /* Used to do a global count of all the cards in the system.  Must be
104  * a global variable so that the eisa probe routines can increment
105  * it */
106 static int el3_cards = 0;
107 #define EL3_MAX_CARDS 8
108 
109 /* To minimize the size of the driver source I only define operating
110    constants if they are used several times.  You'll need the manual
111    anyway if you want to understand driver details. */
112 /* Offsets from base I/O address. */
113 #define EL3_DATA 0x00
114 #define EL3_CMD 0x0e
115 #define EL3_STATUS 0x0e
116 #define EEPROM_READ 0x80
117 
118 #define EL3_IO_EXTENT   16
119 
120 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
121 
122 
123 /* The top five bits written to EL3_CMD are a command, the lower
124    11 bits are the parameter, if applicable. */
125 enum c509cmd {
126         TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
127         RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
128         TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
129         FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
130         SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
131         SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
132         StatsDisable = 22<<11, StopCoax = 23<<11, PowerUp = 27<<11,
133         PowerDown = 28<<11, PowerAuto = 29<<11};
134 
135 enum c509status {
136         IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
137         TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
138         IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000, };
139 
140 /* The SetRxFilter command accepts the following classes: */
141 enum RxFilter {
142         RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 };
143 
144 /* Register window 1 offsets, the window used in normal operation. */
145 #define TX_FIFO         0x00
146 #define RX_FIFO         0x00
147 #define RX_STATUS       0x08
148 #define TX_STATUS       0x0B
149 #define TX_FREE         0x0C            /* Remaining free bytes in Tx buffer. */
150 
151 #define WN0_CONF_CTRL   0x04            /* Window 0: Configuration control register */
152 #define WN0_ADDR_CONF   0x06            /* Window 0: Address configuration register */
153 #define WN0_IRQ         0x08            /* Window 0: Set IRQ line in bits 12-15. */
154 #define WN4_MEDIA       0x0A            /* Window 4: Various transcvr/media bits. */
155 #define MEDIA_TP        0x00C0          /* Enable link beat and jabber for 10baseT. */
156 #define WN4_NETDIAG     0x06            /* Window 4: Net diagnostic */
157 #define FD_ENABLE       0x8000          /* Enable full-duplex ("external loopback") */
158 
159 /*
160  * Must be a power of two (we use a binary and in the
161  * circular queue)
162  */
163 #define SKB_QUEUE_SIZE  64
164 
165 enum el3_cardtype { EL3_ISA, EL3_PNP, EL3_EISA };
166 
167 struct el3_private {
168         spinlock_t lock;
169         /* skb send-queue */
170         int head, size;
171         struct sk_buff *queue[SKB_QUEUE_SIZE];
172         enum el3_cardtype type;
173 };
174 static int id_port;
175 static int current_tag;
176 static struct net_device *el3_devs[EL3_MAX_CARDS];
177 
178 /* Parameters that may be passed into the module. */
179 static int debug = -1;
180 static int irq[] = {-1, -1, -1, -1, -1, -1, -1, -1};
181 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
182 static int max_interrupt_work = 10;
183 #ifdef CONFIG_PNP
184 static int nopnp;
185 #endif
186 
187 static int el3_common_init(struct net_device *dev);
188 static void el3_common_remove(struct net_device *dev);
189 static ushort id_read_eeprom(int index);
190 static ushort read_eeprom(int ioaddr, int index);
191 static int el3_open(struct net_device *dev);
192 static netdev_tx_t el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
193 static irqreturn_t el3_interrupt(int irq, void *dev_id);
194 static void update_stats(struct net_device *dev);
195 static struct net_device_stats *el3_get_stats(struct net_device *dev);
196 static int el3_rx(struct net_device *dev);
197 static int el3_close(struct net_device *dev);
198 static void set_multicast_list(struct net_device *dev);
199 static void el3_tx_timeout (struct net_device *dev);
200 static void el3_down(struct net_device *dev);
201 static void el3_up(struct net_device *dev);
202 static const struct ethtool_ops ethtool_ops;
203 #ifdef CONFIG_PM
204 static int el3_suspend(struct device *, pm_message_t);
205 static int el3_resume(struct device *);
206 #else
207 #define el3_suspend NULL
208 #define el3_resume NULL
209 #endif
210 
211 
212 /* generic device remove for all device types */
213 static int el3_device_remove (struct device *device);
214 #ifdef CONFIG_NET_POLL_CONTROLLER
215 static void el3_poll_controller(struct net_device *dev);
216 #endif
217 
218 /* Return 0 on success, 1 on error, 2 when found already detected PnP card */
219 static int el3_isa_id_sequence(__be16 *phys_addr)
220 {
221         short lrs_state = 0xff;
222         int i;
223 
224         /* ISA boards are detected by sending the ID sequence to the
225            ID_PORT.  We find cards past the first by setting the 'current_tag'
226            on cards as they are found.  Cards with their tag set will not
227            respond to subsequent ID sequences. */
228 
229         outb(0x00, id_port);
230         outb(0x00, id_port);
231         for (i = 0; i < 255; i++) {
232                 outb(lrs_state, id_port);
233                 lrs_state <<= 1;
234                 lrs_state = lrs_state & 0x100 ? lrs_state ^ 0xcf : lrs_state;
235         }
236         /* For the first probe, clear all board's tag registers. */
237         if (current_tag == 0)
238                 outb(0xd0, id_port);
239         else                    /* Otherwise kill off already-found boards. */
240                 outb(0xd8, id_port);
241         if (id_read_eeprom(7) != 0x6d50)
242                 return 1;
243         /* Read in EEPROM data, which does contention-select.
244            Only the lowest address board will stay "on-line".
245            3Com got the byte order backwards. */
246         for (i = 0; i < 3; i++)
247                 phys_addr[i] = htons(id_read_eeprom(i));
248 #ifdef CONFIG_PNP
249         if (!nopnp) {
250                 /* The ISA PnP 3c509 cards respond to the ID sequence too.
251                    This check is needed in order not to register them twice. */
252                 for (i = 0; i < el3_cards; i++) {
253                         struct el3_private *lp = netdev_priv(el3_devs[i]);
254                         if (lp->type == EL3_PNP &&
255                             ether_addr_equal((u8 *)phys_addr, el3_devs[i]->dev_addr)) {
256                                 if (el3_debug > 3)
257                                         pr_debug("3c509 with address %02x %02x %02x %02x %02x %02x was found by ISAPnP\n",
258                                                 phys_addr[0] & 0xff, phys_addr[0] >> 8,
259                                                 phys_addr[1] & 0xff, phys_addr[1] >> 8,
260                                                 phys_addr[2] & 0xff, phys_addr[2] >> 8);
261                                 /* Set the adaptor tag so that the next card can be found. */
262                                 outb(0xd0 + ++current_tag, id_port);
263                                 return 2;
264                         }
265                 }
266         }
267 #endif /* CONFIG_PNP */
268         return 0;
269 
270 }
271 
272 static void el3_dev_fill(struct net_device *dev, __be16 *phys_addr, int ioaddr,
273                          int irq, int if_port, enum el3_cardtype type)
274 {
275         struct el3_private *lp = netdev_priv(dev);
276 
277         memcpy(dev->dev_addr, phys_addr, ETH_ALEN);
278         dev->base_addr = ioaddr;
279         dev->irq = irq;
280         dev->if_port = if_port;
281         lp->type = type;
282 }
283 
284 static int el3_isa_match(struct device *pdev, unsigned int ndev)
285 {
286         struct net_device *dev;
287         int ioaddr, isa_irq, if_port, err;
288         unsigned int iobase;
289         __be16 phys_addr[3];
290 
291         while ((err = el3_isa_id_sequence(phys_addr)) == 2)
292                 ;       /* Skip to next card when PnP card found */
293         if (err == 1)
294                 return 0;
295 
296         iobase = id_read_eeprom(8);
297         if_port = iobase >> 14;
298         ioaddr = 0x200 + ((iobase & 0x1f) << 4);
299         if (irq[el3_cards] > 1 && irq[el3_cards] < 16)
300                 isa_irq = irq[el3_cards];
301         else
302                 isa_irq = id_read_eeprom(9) >> 12;
303 
304         dev = alloc_etherdev(sizeof(struct el3_private));
305         if (!dev)
306                 return -ENOMEM;
307 
308         SET_NETDEV_DEV(dev, pdev);
309         netdev_boot_setup_check(dev);
310 
311         if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509-isa")) {
312                 free_netdev(dev);
313                 return 0;
314         }
315 
316         /* Set the adaptor tag so that the next card can be found. */
317         outb(0xd0 + ++current_tag, id_port);
318 
319         /* Activate the adaptor at the EEPROM location. */
320         outb((ioaddr >> 4) | 0xe0, id_port);
321 
322         EL3WINDOW(0);
323         if (inw(ioaddr) != 0x6d50) {
324                 free_netdev(dev);
325                 return 0;
326         }
327 
328         /* Free the interrupt so that some other card can use it. */
329         outw(0x0f00, ioaddr + WN0_IRQ);
330 
331         el3_dev_fill(dev, phys_addr, ioaddr, isa_irq, if_port, EL3_ISA);
332         dev_set_drvdata(pdev, dev);
333         if (el3_common_init(dev)) {
334                 free_netdev(dev);
335                 return 0;
336         }
337 
338         el3_devs[el3_cards++] = dev;
339         return 1;
340 }
341 
342 static int el3_isa_remove(struct device *pdev,
343                                     unsigned int ndev)
344 {
345         el3_device_remove(pdev);
346         dev_set_drvdata(pdev, NULL);
347         return 0;
348 }
349 
350 #ifdef CONFIG_PM
351 static int el3_isa_suspend(struct device *dev, unsigned int n,
352                            pm_message_t state)
353 {
354         current_tag = 0;
355         return el3_suspend(dev, state);
356 }
357 
358 static int el3_isa_resume(struct device *dev, unsigned int n)
359 {
360         struct net_device *ndev = dev_get_drvdata(dev);
361         int ioaddr = ndev->base_addr, err;
362         __be16 phys_addr[3];
363 
364         while ((err = el3_isa_id_sequence(phys_addr)) == 2)
365                 ;       /* Skip to next card when PnP card found */
366         if (err == 1)
367                 return 0;
368         /* Set the adaptor tag so that the next card can be found. */
369         outb(0xd0 + ++current_tag, id_port);
370         /* Enable the card */
371         outb((ioaddr >> 4) | 0xe0, id_port);
372         EL3WINDOW(0);
373         if (inw(ioaddr) != 0x6d50)
374                 return 1;
375         /* Free the interrupt so that some other card can use it. */
376         outw(0x0f00, ioaddr + WN0_IRQ);
377         return el3_resume(dev);
378 }
379 #endif
380 
381 static struct isa_driver el3_isa_driver = {
382         .match          = el3_isa_match,
383         .remove         = el3_isa_remove,
384 #ifdef CONFIG_PM
385         .suspend        = el3_isa_suspend,
386         .resume         = el3_isa_resume,
387 #endif
388         .driver         = {
389                 .name   = "3c509"
390         },
391 };
392 static int isa_registered;
393 
394 #ifdef CONFIG_PNP
395 static struct pnp_device_id el3_pnp_ids[] = {
396         { .id = "TCM5090" }, /* 3Com Etherlink III (TP) */
397         { .id = "TCM5091" }, /* 3Com Etherlink III */
398         { .id = "TCM5094" }, /* 3Com Etherlink III (combo) */
399         { .id = "TCM5095" }, /* 3Com Etherlink III (TPO) */
400         { .id = "TCM5098" }, /* 3Com Etherlink III (TPC) */
401         { .id = "PNP80f7" }, /* 3Com Etherlink III compatible */
402         { .id = "PNP80f8" }, /* 3Com Etherlink III compatible */
403         { .id = "" }
404 };
405 MODULE_DEVICE_TABLE(pnp, el3_pnp_ids);
406 
407 static int el3_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
408 {
409         short i;
410         int ioaddr, irq, if_port;
411         __be16 phys_addr[3];
412         struct net_device *dev = NULL;
413         int err;
414 
415         ioaddr = pnp_port_start(pdev, 0);
416         if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509-pnp"))
417                 return -EBUSY;
418         irq = pnp_irq(pdev, 0);
419         EL3WINDOW(0);
420         for (i = 0; i < 3; i++)
421                 phys_addr[i] = htons(read_eeprom(ioaddr, i));
422         if_port = read_eeprom(ioaddr, 8) >> 14;
423         dev = alloc_etherdev(sizeof(struct el3_private));
424         if (!dev) {
425                 release_region(ioaddr, EL3_IO_EXTENT);
426                 return -ENOMEM;
427         }
428         SET_NETDEV_DEV(dev, &pdev->dev);
429         netdev_boot_setup_check(dev);
430 
431         el3_dev_fill(dev, phys_addr, ioaddr, irq, if_port, EL3_PNP);
432         pnp_set_drvdata(pdev, dev);
433         err = el3_common_init(dev);
434 
435         if (err) {
436                 pnp_set_drvdata(pdev, NULL);
437                 free_netdev(dev);
438                 return err;
439         }
440 
441         el3_devs[el3_cards++] = dev;
442         return 0;
443 }
444 
445 static void el3_pnp_remove(struct pnp_dev *pdev)
446 {
447         el3_common_remove(pnp_get_drvdata(pdev));
448         pnp_set_drvdata(pdev, NULL);
449 }
450 
451 #ifdef CONFIG_PM
452 static int el3_pnp_suspend(struct pnp_dev *pdev, pm_message_t state)
453 {
454         return el3_suspend(&pdev->dev, state);
455 }
456 
457 static int el3_pnp_resume(struct pnp_dev *pdev)
458 {
459         return el3_resume(&pdev->dev);
460 }
461 #endif
462 
463 static struct pnp_driver el3_pnp_driver = {
464         .name           = "3c509",
465         .id_table       = el3_pnp_ids,
466         .probe          = el3_pnp_probe,
467         .remove         = el3_pnp_remove,
468 #ifdef CONFIG_PM
469         .suspend        = el3_pnp_suspend,
470         .resume         = el3_pnp_resume,
471 #endif
472 };
473 static int pnp_registered;
474 #endif /* CONFIG_PNP */
475 
476 #ifdef CONFIG_EISA
477 static struct eisa_device_id el3_eisa_ids[] = {
478                 { "TCM5090" },
479                 { "TCM5091" },
480                 { "TCM5092" },
481                 { "TCM5093" },
482                 { "TCM5094" },
483                 { "TCM5095" },
484                 { "TCM5098" },
485                 { "" }
486 };
487 MODULE_DEVICE_TABLE(eisa, el3_eisa_ids);
488 
489 static int el3_eisa_probe (struct device *device);
490 
491 static struct eisa_driver el3_eisa_driver = {
492                 .id_table = el3_eisa_ids,
493                 .driver   = {
494                                 .name    = "3c579",
495                                 .probe   = el3_eisa_probe,
496                                 .remove  = el3_device_remove,
497                                 .suspend = el3_suspend,
498                                 .resume  = el3_resume,
499                 }
500 };
501 static int eisa_registered;
502 #endif
503 
504 static const struct net_device_ops netdev_ops = {
505         .ndo_open               = el3_open,
506         .ndo_stop               = el3_close,
507         .ndo_start_xmit         = el3_start_xmit,
508         .ndo_get_stats          = el3_get_stats,
509         .ndo_set_rx_mode        = set_multicast_list,
510         .ndo_tx_timeout         = el3_tx_timeout,
511         .ndo_set_mac_address    = eth_mac_addr,
512         .ndo_validate_addr      = eth_validate_addr,
513 #ifdef CONFIG_NET_POLL_CONTROLLER
514         .ndo_poll_controller    = el3_poll_controller,
515 #endif
516 };
517 
518 static int el3_common_init(struct net_device *dev)
519 {
520         struct el3_private *lp = netdev_priv(dev);
521         int err;
522         const char *if_names[] = {"10baseT", "AUI", "undefined", "BNC"};
523 
524         spin_lock_init(&lp->lock);
525 
526         if (dev->mem_start & 0x05) { /* xcvr codes 1/3/4/12 */
527                 dev->if_port = (dev->mem_start & 0x0f);
528         } else { /* xcvr codes 0/8 */
529                 /* use eeprom value, but save user's full-duplex selection */
530                 dev->if_port |= (dev->mem_start & 0x08);
531         }
532 
533         /* The EL3-specific entries in the device structure. */
534         dev->netdev_ops = &netdev_ops;
535         dev->watchdog_timeo = TX_TIMEOUT;
536         dev->ethtool_ops = &ethtool_ops;
537 
538         err = register_netdev(dev);
539         if (err) {
540                 pr_err("Failed to register 3c5x9 at %#3.3lx, IRQ %d.\n",
541                         dev->base_addr, dev->irq);
542                 release_region(dev->base_addr, EL3_IO_EXTENT);
543                 return err;
544         }
545 
546         pr_info("%s: 3c5x9 found at %#3.3lx, %s port, address %pM, IRQ %d.\n",
547                dev->name, dev->base_addr, if_names[(dev->if_port & 0x03)],
548                dev->dev_addr, dev->irq);
549 
550         if (el3_debug > 0)
551                 pr_info("%s", version);
552         return 0;
553 
554 }
555 
556 static void el3_common_remove (struct net_device *dev)
557 {
558         unregister_netdev (dev);
559         release_region(dev->base_addr, EL3_IO_EXTENT);
560         free_netdev (dev);
561 }
562 
563 #ifdef CONFIG_EISA
564 static int el3_eisa_probe(struct device *device)
565 {
566         short i;
567         int ioaddr, irq, if_port;
568         __be16 phys_addr[3];
569         struct net_device *dev = NULL;
570         struct eisa_device *edev;
571         int err;
572 
573         /* Yeepee, The driver framework is calling us ! */
574         edev = to_eisa_device (device);
575         ioaddr = edev->base_addr;
576 
577         if (!request_region(ioaddr, EL3_IO_EXTENT, "3c579-eisa"))
578                 return -EBUSY;
579 
580         /* Change the register set to the configuration window 0. */
581         outw(SelectWindow | 0, ioaddr + 0xC80 + EL3_CMD);
582 
583         irq = inw(ioaddr + WN0_IRQ) >> 12;
584         if_port = inw(ioaddr + 6)>>14;
585         for (i = 0; i < 3; i++)
586                 phys_addr[i] = htons(read_eeprom(ioaddr, i));
587 
588         /* Restore the "Product ID" to the EEPROM read register. */
589         read_eeprom(ioaddr, 3);
590 
591         dev = alloc_etherdev(sizeof (struct el3_private));
592         if (dev == NULL) {
593                 release_region(ioaddr, EL3_IO_EXTENT);
594                 return -ENOMEM;
595         }
596 
597         SET_NETDEV_DEV(dev, device);
598         netdev_boot_setup_check(dev);
599 
600         el3_dev_fill(dev, phys_addr, ioaddr, irq, if_port, EL3_EISA);
601         eisa_set_drvdata (edev, dev);
602         err = el3_common_init(dev);
603 
604         if (err) {
605                 eisa_set_drvdata (edev, NULL);
606                 free_netdev(dev);
607                 return err;
608         }
609 
610         el3_devs[el3_cards++] = dev;
611         return 0;
612 }
613 #endif
614 
615 /* This remove works for all device types.
616  *
617  * The net dev must be stored in the driver data field */
618 static int el3_device_remove(struct device *device)
619 {
620         struct net_device *dev;
621 
622         dev = dev_get_drvdata(device);
623 
624         el3_common_remove (dev);
625         return 0;
626 }
627 
628 /* Read a word from the EEPROM using the regular EEPROM access register.
629    Assume that we are in register window zero.
630  */
631 static ushort read_eeprom(int ioaddr, int index)
632 {
633         outw(EEPROM_READ + index, ioaddr + 10);
634         /* Pause for at least 162 us. for the read to take place.
635            Some chips seem to require much longer */
636         mdelay(2);
637         return inw(ioaddr + 12);
638 }
639 
640 /* Read a word from the EEPROM when in the ISA ID probe state. */
641 static ushort id_read_eeprom(int index)
642 {
643         int bit, word = 0;
644 
645         /* Issue read command, and pause for at least 162 us. for it to complete.
646            Assume extra-fast 16Mhz bus. */
647         outb(EEPROM_READ + index, id_port);
648 
649         /* Pause for at least 162 us. for the read to take place. */
650         /* Some chips seem to require much longer */
651         mdelay(4);
652 
653         for (bit = 15; bit >= 0; bit--)
654                 word = (word << 1) + (inb(id_port) & 0x01);
655 
656         if (el3_debug > 3)
657                 pr_debug("  3c509 EEPROM word %d %#4.4x.\n", index, word);
658 
659         return word;
660 }
661 
662 
663 static int
664 el3_open(struct net_device *dev)
665 {
666         int ioaddr = dev->base_addr;
667         int i;
668 
669         outw(TxReset, ioaddr + EL3_CMD);
670         outw(RxReset, ioaddr + EL3_CMD);
671         outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
672 
673         i = request_irq(dev->irq, el3_interrupt, 0, dev->name, dev);
674         if (i)
675                 return i;
676 
677         EL3WINDOW(0);
678         if (el3_debug > 3)
679                 pr_debug("%s: Opening, IRQ %d    status@%x %4.4x.\n", dev->name,
680                            dev->irq, ioaddr + EL3_STATUS, inw(ioaddr + EL3_STATUS));
681 
682         el3_up(dev);
683 
684         if (el3_debug > 3)
685                 pr_debug("%s: Opened 3c509  IRQ %d  status %4.4x.\n",
686                            dev->name, dev->irq, inw(ioaddr + EL3_STATUS));
687 
688         return 0;
689 }
690 
691 static void
692 el3_tx_timeout (struct net_device *dev)
693 {
694         int ioaddr = dev->base_addr;
695 
696         /* Transmitter timeout, serious problems. */
697         pr_warn("%s: transmit timed out, Tx_status %2.2x status %4.4x Tx FIFO room %d\n",
698                 dev->name, inb(ioaddr + TX_STATUS), inw(ioaddr + EL3_STATUS),
699                 inw(ioaddr + TX_FREE));
700         dev->stats.tx_errors++;
701         netif_trans_update(dev); /* prevent tx timeout */
702         /* Issue TX_RESET and TX_START commands. */
703         outw(TxReset, ioaddr + EL3_CMD);
704         outw(TxEnable, ioaddr + EL3_CMD);
705         netif_wake_queue(dev);
706 }
707 
708 
709 static netdev_tx_t
710 el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
711 {
712         struct el3_private *lp = netdev_priv(dev);
713         int ioaddr = dev->base_addr;
714         unsigned long flags;
715 
716         netif_stop_queue (dev);
717 
718         dev->stats.tx_bytes += skb->len;
719 
720         if (el3_debug > 4) {
721                 pr_debug("%s: el3_start_xmit(length = %u) called, status %4.4x.\n",
722                            dev->name, skb->len, inw(ioaddr + EL3_STATUS));
723         }
724         /*
725          *      We lock the driver against other processors. Note
726          *      we don't need to lock versus the IRQ as we suspended
727          *      that. This means that we lose the ability to take
728          *      an RX during a TX upload. That sucks a bit with SMP
729          *      on an original 3c509 (2K buffer)
730          *
731          *      Using disable_irq stops us crapping on other
732          *      time sensitive devices.
733          */
734 
735         spin_lock_irqsave(&lp->lock, flags);
736 
737         /* Put out the doubleword header... */
738         outw(skb->len, ioaddr + TX_FIFO);
739         outw(0x00, ioaddr + TX_FIFO);
740         /* ... and the packet rounded to a doubleword. */
741         outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
742 
743         if (inw(ioaddr + TX_FREE) > 1536)
744                 netif_start_queue(dev);
745         else
746                 /* Interrupt us when the FIFO has room for max-sized packet. */
747                 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
748 
749         spin_unlock_irqrestore(&lp->lock, flags);
750 
751         dev_consume_skb_any (skb);
752 
753         /* Clear the Tx status stack. */
754         {
755                 short tx_status;
756                 int i = 4;
757 
758                 while (--i > 0  &&      (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
759                         if (tx_status & 0x38) dev->stats.tx_aborted_errors++;
760                         if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
761                         if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
762                         outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
763                 }
764         }
765         return NETDEV_TX_OK;
766 }
767 
768 /* The EL3 interrupt handler. */
769 static irqreturn_t
770 el3_interrupt(int irq, void *dev_id)
771 {
772         struct net_device *dev = dev_id;
773         struct el3_private *lp;
774         int ioaddr, status;
775         int i = max_interrupt_work;
776 
777         lp = netdev_priv(dev);
778         spin_lock(&lp->lock);
779 
780         ioaddr = dev->base_addr;
781 
782         if (el3_debug > 4) {
783                 status = inw(ioaddr + EL3_STATUS);
784                 pr_debug("%s: interrupt, status %4.4x.\n", dev->name, status);
785         }
786 
787         while ((status = inw(ioaddr + EL3_STATUS)) &
788                    (IntLatch | RxComplete | StatsFull)) {
789 
790                 if (status & RxComplete)
791                         el3_rx(dev);
792 
793                 if (status & TxAvailable) {
794                         if (el3_debug > 5)
795                                 pr_debug("      TX room bit was handled.\n");
796                         /* There's room in the FIFO for a full-sized packet. */
797                         outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
798                         netif_wake_queue (dev);
799                 }
800                 if (status & (AdapterFailure | RxEarly | StatsFull | TxComplete)) {
801                         /* Handle all uncommon interrupts. */
802                         if (status & StatsFull)                         /* Empty statistics. */
803                                 update_stats(dev);
804                         if (status & RxEarly) {                         /* Rx early is unused. */
805                                 el3_rx(dev);
806                                 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
807                         }
808                         if (status & TxComplete) {                      /* Really Tx error. */
809                                 short tx_status;
810                                 int i = 4;
811 
812                                 while (--i>0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
813                                         if (tx_status & 0x38) dev->stats.tx_aborted_errors++;
814                                         if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
815                                         if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
816                                         outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
817                                 }
818                         }
819                         if (status & AdapterFailure) {
820                                 /* Adapter failure requires Rx reset and reinit. */
821                                 outw(RxReset, ioaddr + EL3_CMD);
822                                 /* Set the Rx filter to the current state. */
823                                 outw(SetRxFilter | RxStation | RxBroadcast
824                                          | (dev->flags & IFF_ALLMULTI ? RxMulticast : 0)
825                                          | (dev->flags & IFF_PROMISC ? RxProm : 0),
826                                          ioaddr + EL3_CMD);
827                                 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
828                                 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
829                         }
830                 }
831 
832                 if (--i < 0) {
833                         pr_err("%s: Infinite loop in interrupt, status %4.4x.\n",
834                                    dev->name, status);
835                         /* Clear all interrupts. */
836                         outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
837                         break;
838                 }
839                 /* Acknowledge the IRQ. */
840                 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); /* Ack IRQ */
841         }
842 
843         if (el3_debug > 4) {
844                 pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name,
845                            inw(ioaddr + EL3_STATUS));
846         }
847         spin_unlock(&lp->lock);
848         return IRQ_HANDLED;
849 }
850 
851 
852 #ifdef CONFIG_NET_POLL_CONTROLLER
853 /*
854  * Polling receive - used by netconsole and other diagnostic tools
855  * to allow network i/o with interrupts disabled.
856  */
857 static void el3_poll_controller(struct net_device *dev)
858 {
859         disable_irq(dev->irq);
860         el3_interrupt(dev->irq, dev);
861         enable_irq(dev->irq);
862 }
863 #endif
864 
865 static struct net_device_stats *
866 el3_get_stats(struct net_device *dev)
867 {
868         struct el3_private *lp = netdev_priv(dev);
869         unsigned long flags;
870 
871         /*
872          *      This is fast enough not to bother with disable IRQ
873          *      stuff.
874          */
875 
876         spin_lock_irqsave(&lp->lock, flags);
877         update_stats(dev);
878         spin_unlock_irqrestore(&lp->lock, flags);
879         return &dev->stats;
880 }
881 
882 /*  Update statistics.  We change to register window 6, so this should be run
883         single-threaded if the device is active. This is expected to be a rare
884         operation, and it's simpler for the rest of the driver to assume that
885         window 1 is always valid rather than use a special window-state variable.
886         */
887 static void update_stats(struct net_device *dev)
888 {
889         int ioaddr = dev->base_addr;
890 
891         if (el3_debug > 5)
892                 pr_debug("   Updating the statistics.\n");
893         /* Turn off statistics updates while reading. */
894         outw(StatsDisable, ioaddr + EL3_CMD);
895         /* Switch to the stats window, and read everything. */
896         EL3WINDOW(6);
897         dev->stats.tx_carrier_errors    += inb(ioaddr + 0);
898         dev->stats.tx_heartbeat_errors  += inb(ioaddr + 1);
899         /* Multiple collisions. */         inb(ioaddr + 2);
900         dev->stats.collisions           += inb(ioaddr + 3);
901         dev->stats.tx_window_errors     += inb(ioaddr + 4);
902         dev->stats.rx_fifo_errors       += inb(ioaddr + 5);
903         dev->stats.tx_packets           += inb(ioaddr + 6);
904         /* Rx packets   */                 inb(ioaddr + 7);
905         /* Tx deferrals */                 inb(ioaddr + 8);
906         inw(ioaddr + 10);       /* Total Rx and Tx octets. */
907         inw(ioaddr + 12);
908 
909         /* Back to window 1, and turn statistics back on. */
910         EL3WINDOW(1);
911         outw(StatsEnable, ioaddr + EL3_CMD);
912 }
913 
914 static int
915 el3_rx(struct net_device *dev)
916 {
917         int ioaddr = dev->base_addr;
918         short rx_status;
919 
920         if (el3_debug > 5)
921                 pr_debug("   In rx_packet(), status %4.4x, rx_status %4.4x.\n",
922                            inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
923         while ((rx_status = inw(ioaddr + RX_STATUS)) > 0) {
924                 if (rx_status & 0x4000) { /* Error, update stats. */
925                         short error = rx_status & 0x3800;
926 
927                         outw(RxDiscard, ioaddr + EL3_CMD);
928                         dev->stats.rx_errors++;
929                         switch (error) {
930                         case 0x0000:            dev->stats.rx_over_errors++; break;
931                         case 0x0800:            dev->stats.rx_length_errors++; break;
932                         case 0x1000:            dev->stats.rx_frame_errors++; break;
933                         case 0x1800:            dev->stats.rx_length_errors++; break;
934                         case 0x2000:            dev->stats.rx_frame_errors++; break;
935                         case 0x2800:            dev->stats.rx_crc_errors++; break;
936                         }
937                 } else {
938                         short pkt_len = rx_status & 0x7ff;
939                         struct sk_buff *skb;
940 
941                         skb = netdev_alloc_skb(dev, pkt_len + 5);
942                         if (el3_debug > 4)
943                                 pr_debug("Receiving packet size %d status %4.4x.\n",
944                                            pkt_len, rx_status);
945                         if (skb != NULL) {
946                                 skb_reserve(skb, 2);     /* Align IP on 16 byte */
947 
948                                 /* 'skb->data' points to the start of sk_buff data area. */
949                                 insl(ioaddr + RX_FIFO, skb_put(skb,pkt_len),
950                                          (pkt_len + 3) >> 2);
951 
952                                 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
953                                 skb->protocol = eth_type_trans(skb,dev);
954                                 netif_rx(skb);
955                                 dev->stats.rx_bytes += pkt_len;
956                                 dev->stats.rx_packets++;
957                                 continue;
958                         }
959                         outw(RxDiscard, ioaddr + EL3_CMD);
960                         dev->stats.rx_dropped++;
961                         if (el3_debug)
962                                 pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n",
963                                            dev->name, pkt_len);
964                 }
965                 inw(ioaddr + EL3_STATUS);                               /* Delay. */
966                 while (inw(ioaddr + EL3_STATUS) & 0x1000)
967                         pr_debug("      Waiting for 3c509 to discard packet, status %x.\n",
968                                    inw(ioaddr + EL3_STATUS) );
969         }
970 
971         return 0;
972 }
973 
974 /*
975  *     Set or clear the multicast filter for this adaptor.
976  */
977 static void
978 set_multicast_list(struct net_device *dev)
979 {
980         unsigned long flags;
981         struct el3_private *lp = netdev_priv(dev);
982         int ioaddr = dev->base_addr;
983         int mc_count = netdev_mc_count(dev);
984 
985         if (el3_debug > 1) {
986                 static int old;
987                 if (old != mc_count) {
988                         old = mc_count;
989                         pr_debug("%s: Setting Rx mode to %d addresses.\n",
990                                  dev->name, mc_count);
991                 }
992         }
993         spin_lock_irqsave(&lp->lock, flags);
994         if (dev->flags&IFF_PROMISC) {
995                 outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
996                          ioaddr + EL3_CMD);
997         }
998         else if (mc_count || (dev->flags&IFF_ALLMULTI)) {
999                 outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast, ioaddr + EL3_CMD);
1000         }
1001         else
1002                 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
1003         spin_unlock_irqrestore(&lp->lock, flags);
1004 }
1005 
1006 static int
1007 el3_close(struct net_device *dev)
1008 {
1009         int ioaddr = dev->base_addr;
1010         struct el3_private *lp = netdev_priv(dev);
1011 
1012         if (el3_debug > 2)
1013                 pr_debug("%s: Shutting down ethercard.\n", dev->name);
1014 
1015         el3_down(dev);
1016 
1017         free_irq(dev->irq, dev);
1018         /* Switching back to window 0 disables the IRQ. */
1019         EL3WINDOW(0);
1020         if (lp->type != EL3_EISA) {
1021                 /* But we explicitly zero the IRQ line select anyway. Don't do
1022                  * it on EISA cards, it prevents the module from getting an
1023                  * IRQ after unload+reload... */
1024                 outw(0x0f00, ioaddr + WN0_IRQ);
1025         }
1026 
1027         return 0;
1028 }
1029 
1030 static int
1031 el3_link_ok(struct net_device *dev)
1032 {
1033         int ioaddr = dev->base_addr;
1034         u16 tmp;
1035 
1036         EL3WINDOW(4);
1037         tmp = inw(ioaddr + WN4_MEDIA);
1038         EL3WINDOW(1);
1039         return tmp & (1<<11);
1040 }
1041 
1042 static int
1043 el3_netdev_get_ecmd(struct net_device *dev, struct ethtool_link_ksettings *cmd)
1044 {
1045         u16 tmp;
1046         int ioaddr = dev->base_addr;
1047         u32 supported;
1048 
1049         EL3WINDOW(0);
1050         /* obtain current transceiver via WN4_MEDIA? */
1051         tmp = inw(ioaddr + WN0_ADDR_CONF);
1052         switch (tmp >> 14) {
1053         case 0:
1054                 cmd->base.port = PORT_TP;
1055                 break;
1056         case 1:
1057                 cmd->base.port = PORT_AUI;
1058                 break;
1059         case 3:
1060                 cmd->base.port = PORT_BNC;
1061         default:
1062                 break;
1063         }
1064 
1065         cmd->base.duplex = DUPLEX_HALF;
1066         supported = 0;
1067         tmp = inw(ioaddr + WN0_CONF_CTRL);
1068         if (tmp & (1<<13))
1069                 supported |= SUPPORTED_AUI;
1070         if (tmp & (1<<12))
1071                 supported |= SUPPORTED_BNC;
1072         if (tmp & (1<<9)) {
1073                 supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half |
1074                                 SUPPORTED_10baseT_Full; /* hmm... */
1075                 EL3WINDOW(4);
1076                 tmp = inw(ioaddr + WN4_NETDIAG);
1077                 if (tmp & FD_ENABLE)
1078                         cmd->base.duplex = DUPLEX_FULL;
1079         }
1080 
1081         ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1082                                                 supported);
1083         cmd->base.speed = SPEED_10;
1084         EL3WINDOW(1);
1085         return 0;
1086 }
1087 
1088 static int
1089 el3_netdev_set_ecmd(struct net_device *dev,
1090                     const struct ethtool_link_ksettings *cmd)
1091 {
1092         u16 tmp;
1093         int ioaddr = dev->base_addr;
1094 
1095         if (cmd->base.speed != SPEED_10)
1096                 return -EINVAL;
1097         if ((cmd->base.duplex != DUPLEX_HALF) &&
1098             (cmd->base.duplex != DUPLEX_FULL))
1099                 return -EINVAL;
1100 
1101         /* change XCVR type */
1102         EL3WINDOW(0);
1103         tmp = inw(ioaddr + WN0_ADDR_CONF);
1104         switch (cmd->base.port) {
1105         case PORT_TP:
1106                 tmp &= ~(3<<14);
1107                 dev->if_port = 0;
1108                 break;
1109         case PORT_AUI:
1110                 tmp |= (1<<14);
1111                 dev->if_port = 1;
1112                 break;
1113         case PORT_BNC:
1114                 tmp |= (3<<14);
1115                 dev->if_port = 3;
1116                 break;
1117         default:
1118                 return -EINVAL;
1119         }
1120 
1121         outw(tmp, ioaddr + WN0_ADDR_CONF);
1122         if (dev->if_port == 3) {
1123                 /* fire up the DC-DC convertor if BNC gets enabled */
1124                 tmp = inw(ioaddr + WN0_ADDR_CONF);
1125                 if (tmp & (3 << 14)) {
1126                         outw(StartCoax, ioaddr + EL3_CMD);
1127                         udelay(800);
1128                 } else
1129                         return -EIO;
1130         }
1131 
1132         EL3WINDOW(4);
1133         tmp = inw(ioaddr + WN4_NETDIAG);
1134         if (cmd->base.duplex == DUPLEX_FULL)
1135                 tmp |= FD_ENABLE;
1136         else
1137                 tmp &= ~FD_ENABLE;
1138         outw(tmp, ioaddr + WN4_NETDIAG);
1139         EL3WINDOW(1);
1140 
1141         return 0;
1142 }
1143 
1144 static void el3_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1145 {
1146         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1147         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1148 }
1149 
1150 static int el3_get_link_ksettings(struct net_device *dev,
1151                                   struct ethtool_link_ksettings *cmd)
1152 {
1153         struct el3_private *lp = netdev_priv(dev);
1154         int ret;
1155 
1156         spin_lock_irq(&lp->lock);
1157         ret = el3_netdev_get_ecmd(dev, cmd);
1158         spin_unlock_irq(&lp->lock);
1159         return ret;
1160 }
1161 
1162 static int el3_set_link_ksettings(struct net_device *dev,
1163                                   const struct ethtool_link_ksettings *cmd)
1164 {
1165         struct el3_private *lp = netdev_priv(dev);
1166         int ret;
1167 
1168         spin_lock_irq(&lp->lock);
1169         ret = el3_netdev_set_ecmd(dev, cmd);
1170         spin_unlock_irq(&lp->lock);
1171         return ret;
1172 }
1173 
1174 static u32 el3_get_link(struct net_device *dev)
1175 {
1176         struct el3_private *lp = netdev_priv(dev);
1177         u32 ret;
1178 
1179         spin_lock_irq(&lp->lock);
1180         ret = el3_link_ok(dev);
1181         spin_unlock_irq(&lp->lock);
1182         return ret;
1183 }
1184 
1185 static u32 el3_get_msglevel(struct net_device *dev)
1186 {
1187         return el3_debug;
1188 }
1189 
1190 static void el3_set_msglevel(struct net_device *dev, u32 v)
1191 {
1192         el3_debug = v;
1193 }
1194 
1195 static const struct ethtool_ops ethtool_ops = {
1196         .get_drvinfo = el3_get_drvinfo,
1197         .get_link = el3_get_link,
1198         .get_msglevel = el3_get_msglevel,
1199         .set_msglevel = el3_set_msglevel,
1200         .get_link_ksettings = el3_get_link_ksettings,
1201         .set_link_ksettings = el3_set_link_ksettings,
1202 };
1203 
1204 static void
1205 el3_down(struct net_device *dev)
1206 {
1207         int ioaddr = dev->base_addr;
1208 
1209         netif_stop_queue(dev);
1210 
1211         /* Turn off statistics ASAP.  We update lp->stats below. */
1212         outw(StatsDisable, ioaddr + EL3_CMD);
1213 
1214         /* Disable the receiver and transmitter. */
1215         outw(RxDisable, ioaddr + EL3_CMD);
1216         outw(TxDisable, ioaddr + EL3_CMD);
1217 
1218         if (dev->if_port == 3)
1219                 /* Turn off thinnet power.  Green! */
1220                 outw(StopCoax, ioaddr + EL3_CMD);
1221         else if (dev->if_port == 0) {
1222                 /* Disable link beat and jabber, if_port may change here next open(). */
1223                 EL3WINDOW(4);
1224                 outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
1225         }
1226 
1227         outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1228 
1229         update_stats(dev);
1230 }
1231 
1232 static void
1233 el3_up(struct net_device *dev)
1234 {
1235         int i, sw_info, net_diag;
1236         int ioaddr = dev->base_addr;
1237 
1238         /* Activating the board required and does no harm otherwise */
1239         outw(0x0001, ioaddr + 4);
1240 
1241         /* Set the IRQ line. */
1242         outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);
1243 
1244         /* Set the station address in window 2 each time opened. */
1245         EL3WINDOW(2);
1246 
1247         for (i = 0; i < 6; i++)
1248                 outb(dev->dev_addr[i], ioaddr + i);
1249 
1250         if ((dev->if_port & 0x03) == 3) /* BNC interface */
1251                 /* Start the thinnet transceiver. We should really wait 50ms...*/
1252                 outw(StartCoax, ioaddr + EL3_CMD);
1253         else if ((dev->if_port & 0x03) == 0) { /* 10baseT interface */
1254                 /* Combine secondary sw_info word (the adapter level) and primary
1255                         sw_info word (duplex setting plus other useless bits) */
1256                 EL3WINDOW(0);
1257                 sw_info = (read_eeprom(ioaddr, 0x14) & 0x400f) |
1258                         (read_eeprom(ioaddr, 0x0d) & 0xBff0);
1259 
1260                 EL3WINDOW(4);
1261                 net_diag = inw(ioaddr + WN4_NETDIAG);
1262                 net_diag = (net_diag | FD_ENABLE); /* temporarily assume full-duplex will be set */
1263                 pr_info("%s: ", dev->name);
1264                 switch (dev->if_port & 0x0c) {
1265                         case 12:
1266                                 /* force full-duplex mode if 3c5x9b */
1267                                 if (sw_info & 0x000f) {
1268                                         pr_cont("Forcing 3c5x9b full-duplex mode");
1269                                         break;
1270                                 }
1271                         case 8:
1272                                 /* set full-duplex mode based on eeprom config setting */
1273                                 if ((sw_info & 0x000f) && (sw_info & 0x8000)) {
1274                                         pr_cont("Setting 3c5x9b full-duplex mode (from EEPROM configuration bit)");
1275                                         break;
1276                                 }
1277                         default:
1278                                 /* xcvr=(0 || 4) OR user has an old 3c5x9 non "B" model */
1279                                 pr_cont("Setting 3c5x9/3c5x9B half-duplex mode");
1280                                 net_diag = (net_diag & ~FD_ENABLE); /* disable full duplex */
1281                 }
1282 
1283                 outw(net_diag, ioaddr + WN4_NETDIAG);
1284                 pr_cont(" if_port: %d, sw_info: %4.4x\n", dev->if_port, sw_info);
1285                 if (el3_debug > 3)
1286                         pr_debug("%s: 3c5x9 net diag word is now: %4.4x.\n", dev->name, net_diag);
1287                 /* Enable link beat and jabber check. */
1288                 outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
1289         }
1290 
1291         /* Switch to the stats window, and clear all stats by reading. */
1292         outw(StatsDisable, ioaddr + EL3_CMD);
1293         EL3WINDOW(6);
1294         for (i = 0; i < 9; i++)
1295                 inb(ioaddr + i);
1296         inw(ioaddr + 10);
1297         inw(ioaddr + 12);
1298 
1299         /* Switch to register set 1 for normal use. */
1300         EL3WINDOW(1);
1301 
1302         /* Accept b-case and phys addr only. */
1303         outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
1304         outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
1305 
1306         outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
1307         outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
1308         /* Allow status bits to be seen. */
1309         outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
1310         /* Ack all pending events, and set active indicator mask. */
1311         outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
1312                  ioaddr + EL3_CMD);
1313         outw(SetIntrEnb | IntLatch|TxAvailable|TxComplete|RxComplete|StatsFull,
1314                  ioaddr + EL3_CMD);
1315 
1316         netif_start_queue(dev);
1317 }
1318 
1319 /* Power Management support functions */
1320 #ifdef CONFIG_PM
1321 
1322 static int
1323 el3_suspend(struct device *pdev, pm_message_t state)
1324 {
1325         unsigned long flags;
1326         struct net_device *dev;
1327         struct el3_private *lp;
1328         int ioaddr;
1329 
1330         dev = dev_get_drvdata(pdev);
1331         lp = netdev_priv(dev);
1332         ioaddr = dev->base_addr;
1333 
1334         spin_lock_irqsave(&lp->lock, flags);
1335 
1336         if (netif_running(dev))
1337                 netif_device_detach(dev);
1338 
1339         el3_down(dev);
1340         outw(PowerDown, ioaddr + EL3_CMD);
1341 
1342         spin_unlock_irqrestore(&lp->lock, flags);
1343         return 0;
1344 }
1345 
1346 static int
1347 el3_resume(struct device *pdev)
1348 {
1349         unsigned long flags;
1350         struct net_device *dev;
1351         struct el3_private *lp;
1352         int ioaddr;
1353 
1354         dev = dev_get_drvdata(pdev);
1355         lp = netdev_priv(dev);
1356         ioaddr = dev->base_addr;
1357 
1358         spin_lock_irqsave(&lp->lock, flags);
1359 
1360         outw(PowerUp, ioaddr + EL3_CMD);
1361         EL3WINDOW(0);
1362         el3_up(dev);
1363 
1364         if (netif_running(dev))
1365                 netif_device_attach(dev);
1366 
1367         spin_unlock_irqrestore(&lp->lock, flags);
1368         return 0;
1369 }
1370 
1371 #endif /* CONFIG_PM */
1372 
1373 module_param(debug,int, 0);
1374 module_param_array(irq, int, NULL, 0);
1375 module_param(max_interrupt_work, int, 0);
1376 MODULE_PARM_DESC(debug, "debug level (0-6)");
1377 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
1378 MODULE_PARM_DESC(max_interrupt_work, "maximum events handled per interrupt");
1379 #ifdef CONFIG_PNP
1380 module_param(nopnp, int, 0);
1381 MODULE_PARM_DESC(nopnp, "disable ISA PnP support (0-1)");
1382 #endif  /* CONFIG_PNP */
1383 MODULE_DESCRIPTION("3Com Etherlink III (3c509, 3c509B, 3c529, 3c579) ethernet driver");
1384 MODULE_LICENSE("GPL");
1385 
1386 static int __init el3_init_module(void)
1387 {
1388         int ret = 0;
1389 
1390         if (debug >= 0)
1391                 el3_debug = debug;
1392 
1393 #ifdef CONFIG_PNP
1394         if (!nopnp) {
1395                 ret = pnp_register_driver(&el3_pnp_driver);
1396                 if (!ret)
1397                         pnp_registered = 1;
1398         }
1399 #endif
1400         /* Select an open I/O location at 0x1*0 to do ISA contention select. */
1401         /* Start with 0x110 to avoid some sound cards.*/
1402         for (id_port = 0x110 ; id_port < 0x200; id_port += 0x10) {
1403                 if (!request_region(id_port, 1, "3c509-control"))
1404                         continue;
1405                 outb(0x00, id_port);
1406                 outb(0xff, id_port);
1407                 if (inb(id_port) & 0x01)
1408                         break;
1409                 else
1410                         release_region(id_port, 1);
1411         }
1412         if (id_port >= 0x200) {
1413                 id_port = 0;
1414                 pr_err("No I/O port available for 3c509 activation.\n");
1415         } else {
1416                 ret = isa_register_driver(&el3_isa_driver, EL3_MAX_CARDS);
1417                 if (!ret)
1418                         isa_registered = 1;
1419         }
1420 #ifdef CONFIG_EISA
1421         ret = eisa_driver_register(&el3_eisa_driver);
1422         if (!ret)
1423                 eisa_registered = 1;
1424 #endif
1425 
1426 #ifdef CONFIG_PNP
1427         if (pnp_registered)
1428                 ret = 0;
1429 #endif
1430         if (isa_registered)
1431                 ret = 0;
1432 #ifdef CONFIG_EISA
1433         if (eisa_registered)
1434                 ret = 0;
1435 #endif
1436         return ret;
1437 }
1438 
1439 static void __exit el3_cleanup_module(void)
1440 {
1441 #ifdef CONFIG_PNP
1442         if (pnp_registered)
1443                 pnp_unregister_driver(&el3_pnp_driver);
1444 #endif
1445         if (isa_registered)
1446                 isa_unregister_driver(&el3_isa_driver);
1447         if (id_port)
1448                 release_region(id_port, 1);
1449 #ifdef CONFIG_EISA
1450         if (eisa_registered)
1451                 eisa_driver_unregister(&el3_eisa_driver);
1452 #endif
1453 }
1454 
1455 module_init (el3_init_module);
1456 module_exit (el3_cleanup_module);
1457 

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