1 /*** -*- linux-c -*- **********************************************************
2
3 Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
4
5 Copyright 2000-2001 ATMEL Corporation.
6 Copyright 2003 Simon Kelley.
7
8 This code was developed from version 2.1.1 of the Atmel drivers,
9 released by Atmel corp. under the GPL in December 2002. It also
10 includes code from the Linux aironet drivers (C) Benjamin Reed,
11 and the Linux PCMCIA package, (C) David Hinds.
12
13 For all queries about this code, please contact the current author,
14 Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
15
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
20
21 This software is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
25
26 You should have received a copy of the GNU General Public License
27 along with Atmel wireless lan drivers; if not, write to the Free Software
28 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29
30 ******************************************************************************/
31
32 #include <linux/config.h>
33 #ifdef __IN_PCMCIA_PACKAGE__
34 #include <pcmcia/k_compat.h>
35 #endif
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/ptrace.h>
40 #include <linux/slab.h>
41 #include <linux/string.h>
42 #include <linux/netdevice.h>
43 #include <linux/moduleparam.h>
44 #include <linux/device.h>
45
46 #include <pcmcia/version.h>
47 #include <pcmcia/cs_types.h>
48 #include <pcmcia/cs.h>
49 #include <pcmcia/cistpl.h>
50 #include <pcmcia/cisreg.h>
51 #include <pcmcia/ds.h>
52 #include <pcmcia/ciscode.h>
53
54 #include <asm/io.h>
55 #include <asm/system.h>
56 #include <linux/wireless.h>
57
58
59 /*
60 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
61 you do not define PCMCIA_DEBUG at all, all the debug code will be
62 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
63 be present but disabled -- but it can then be enabled for specific
64 modules at load time with a 'pc_debug=#' option to insmod.
65 */
66 #ifdef PCMCIA_DEBUG
67 static int pc_debug = PCMCIA_DEBUG;
68 module_param(pc_debug, int, 0);
69 static char *version = "$Revision: 1.2 $";
70 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
71 #else
72 #define DEBUG(n, args...)
73 #endif
74
75 /*====================================================================*/
76
77 MODULE_AUTHOR("Simon Kelley");
78 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
79 MODULE_LICENSE("GPL");
80 MODULE_SUPPORTED_DEVICE("Atmel at76c50x PCMCIA cards");
81
82 /*====================================================================*/
83
84 /*
85 The event() function is this driver's Card Services event handler.
86 It will be called by Card Services when an appropriate card status
87 event is received. The config() and release() entry points are
88 used to configure or release a socket, in response to card
89 insertion and ejection events. They are invoked from the atmel_cs
90 event handler.
91 */
92
93 struct net_device *init_atmel_card(int, int, char *, struct device *,
94 int (*present_func)(void *), void * );
95 void stop_atmel_card( struct net_device *, int );
96 int atmel_open( struct net_device * );
97
98 static void atmel_config(dev_link_t *link);
99 static void atmel_release(dev_link_t *link);
100 static int atmel_event(event_t event, int priority,
101 event_callback_args_t *args);
102
103 /*
104 The attach() and detach() entry points are used to create and destroy
105 "instances" of the driver, where each instance represents everything
106 needed to manage one actual PCMCIA card.
107 */
108
109 static dev_link_t *atmel_attach(void);
110 static void atmel_detach(dev_link_t *);
111
112 /*
113 You'll also need to prototype all the functions that will actually
114 be used to talk to your device. See 'pcmem_cs' for a good example
115 of a fully self-sufficient driver; the other drivers rely more or
116 less on other parts of the kernel.
117 */
118
119 /*
120 The dev_info variable is the "key" that is used to match up this
121 device driver with appropriate cards, through the card configuration
122 database.
123 */
124
125 static dev_info_t dev_info = "atmel_cs";
126
127 /*
128 A linked list of "instances" of the atmelnet device. Each actual
129 PCMCIA card corresponds to one device instance, and is described
130 by one dev_link_t structure (defined in ds.h).
131
132 You may not want to use a linked list for this -- for example, the
133 memory card driver uses an array of dev_link_t pointers, where minor
134 device numbers are used to derive the corresponding array index.
135 */
136
137 static dev_link_t *dev_list = NULL;
138
139 /*
140 A dev_link_t structure has fields for most things that are needed
141 to keep track of a socket, but there will usually be some device
142 specific information that also needs to be kept track of. The
143 'priv' pointer in a dev_link_t structure can be used to point to
144 a device-specific private data structure, like this.
145
146 A driver needs to provide a dev_node_t structure for each device
147 on a card. In some cases, there is only one device per card (for
148 example, ethernet cards, modems). In other cases, there may be
149 many actual or logical devices (SCSI adapters, memory cards with
150 multiple partitions). The dev_node_t structures need to be kept
151 in a linked list starting at the 'dev' field of a dev_link_t
152 structure. We allocate them in the card's private data structure,
153 because they generally shouldn't be allocated dynamically.
154
155 In this case, we also provide a flag to indicate if a device is
156 "stopped" due to a power management event, or card ejection. The
157 device IO routines can use a flag like this to throttle IO to a
158 card that is not ready to accept it.
159 */
160
161 typedef struct local_info_t {
162 dev_node_t node;
163 struct net_device *eth_dev;
164 } local_info_t;
165
166 /*======================================================================
167
168 atmel_attach() creates an "instance" of the driver, allocating
169 local data structures for one device. The device is registered
170 with Card Services.
171
172 The dev_link structure is initialized, but we don't actually
173 configure the card at this point -- we wait until we receive a
174 card insertion event.
175
176 ======================================================================*/
177
178 static dev_link_t *atmel_attach(void)
179 {
180 client_reg_t client_reg;
181 dev_link_t *link;
182 local_info_t *local;
183 int ret;
184
185 DEBUG(0, "atmel_attach()\n");
186
187 /* Initialize the dev_link_t structure */
188 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
189 if (!link) {
190 printk(KERN_ERR "atmel_cs: no memory for new device\n");
191 return NULL;
192 }
193 memset(link, 0, sizeof(struct dev_link_t));
194
195 /* Interrupt setup */
196 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
197 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
198 link->irq.Handler = NULL;
199
200 /*
201 General socket configuration defaults can go here. In this
202 client, we assume very little, and rely on the CIS for almost
203 everything. In most clients, many details (i.e., number, sizes,
204 and attributes of IO windows) are fixed by the nature of the
205 device, and can be hard-wired here.
206 */
207 link->conf.Attributes = 0;
208 link->conf.Vcc = 50;
209 link->conf.IntType = INT_MEMORY_AND_IO;
210
211 /* Allocate space for private device-specific data */
212 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
213 if (!local) {
214 printk(KERN_ERR "atmel_cs: no memory for new device\n");
215 kfree (link);
216 return NULL;
217 }
218 memset(local, 0, sizeof(local_info_t));
219 link->priv = local;
220
221 /* Register with Card Services */
222 link->next = dev_list;
223 dev_list = link;
224 client_reg.dev_info = &dev_info;
225 client_reg.EventMask =
226 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
227 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
228 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
229 client_reg.event_handler = &atmel_event;
230 client_reg.Version = 0x0210;
231 client_reg.event_callback_args.client_data = link;
232 ret = pcmcia_register_client(&link->handle, &client_reg);
233 if (ret != 0) {
234 cs_error(link->handle, RegisterClient, ret);
235 atmel_detach(link);
236 return NULL;
237 }
238
239 return link;
240 } /* atmel_attach */
241
242 /*======================================================================
243
244 This deletes a driver "instance". The device is de-registered
245 with Card Services. If it has been released, all local data
246 structures are freed. Otherwise, the structures will be freed
247 when the device is released.
248
249 ======================================================================*/
250
251 static void atmel_detach(dev_link_t *link)
252 {
253 dev_link_t **linkp;
254
255 DEBUG(0, "atmel_detach(0x%p)\n", link);
256
257 /* Locate device structure */
258 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
259 if (*linkp == link) break;
260 if (*linkp == NULL)
261 return;
262
263 if (link->state & DEV_CONFIG)
264 atmel_release(link);
265
266 /* Break the link with Card Services */
267 if (link->handle)
268 pcmcia_deregister_client(link->handle);
269
270 /* Unlink device structure, free pieces */
271 *linkp = link->next;
272 if (link->priv)
273 kfree(link->priv);
274 kfree(link);
275 }
276
277 /*======================================================================
278
279 atmel_config() is scheduled to run after a CARD_INSERTION event
280 is received, to configure the PCMCIA socket, and to make the
281 device available to the system.
282
283 ======================================================================*/
284
285 #define CS_CHECK(fn, ret) \
286 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
287
288 /* Call-back function to interrogate PCMCIA-specific information
289 about the current existance of the card */
290 static int card_present(void *arg)
291 {
292 dev_link_t *link = (dev_link_t *)arg;
293 if (link->state & DEV_SUSPEND)
294 return 0;
295 else if (link->state & DEV_PRESENT)
296 return 1;
297
298 return 0;
299 }
300
301 /* list of cards we know about and their firmware requirements.
302 Go either by Manfid or version strings.
303 Cards not in this list will need a firmware parameter to the module
304 in all probability. Note that the SMC 2632 V2 and V3 have the same
305 manfids, so we ignore those and use the version1 strings. */
306
307 static struct {
308 int manf, card;
309 char *ver1;
310 char *firmware;
311 char *name;
312 } card_table[] = {
313 { 0, 0, "WLAN/802.11b PC CARD", "atmel_at76c502d%s.bin", "Actiontec 802CAT1" },
314 { 0, 0, "ATMEL/AT76C502AR", "atmel_at76c502%s.bin", "NoName-RFMD" },
315 { 0, 0, "ATMEL/AT76C502AR_D", "atmel_at76c502d%s.bin", "NoName-revD" },
316 { 0, 0, "ATMEL/AT76C502AR_E", "atmel_at76c502e%s.bin", "NoName-revE" },
317 { 0, 0, "ATMEL/AT76C504", "atmel_at76c504%s.bin", "NoName-504" },
318 { 0, 0, "ATMEL/AT76C504A", "atmel_at76c504a_2958%s.bin", "NoName-504a-2958" },
319 { 0, 0, "ATMEL/AT76C504_R", "atmel_at76c504_2958%s.bin", "NoName-504-2958" },
320 { MANFID_3COM, 0x0620, NULL, "atmel_at76c502_3com%s.bin", "3com 3CRWE62092B" },
321 { MANFID_3COM, 0x0696, NULL, "atmel_at76c502_3com%s.bin", "3com 3CRSHPW196" },
322 { 0, 0, "SMC/2632W-V2", "atmel_at76c502%s.bin", "SMC 2632W-V2" },
323 { 0, 0, "SMC/2632W", "atmel_at76c502d%s.bin", "SMC 2632W-V3" },
324 { 0xd601, 0x0007, NULL, "atmel_at76c502%s.bin", "Sitecom WLAN-011" },
325 { 0x01bf, 0x3302, NULL, "atmel_at76c502e%s.bin", "Belkin F5D6020-V2" },
326 { 0, 0, "BT/Voyager 1020 Laptop Adapter", "atmel_at76c502%s.bin", "BT Voyager 1020" },
327 { 0, 0, "IEEE 802.11b/Wireless LAN PC Card", "atmel_at76c502%s.bin", "Siemens Gigaset PC Card II" },
328 { 0, 0, "CNet/CNWLC 11Mbps Wireless PC Card V-5", "atmel_at76c502e%s.bin", "CNet CNWLC-811ARL" },
329 { 0, 0, "Wireless/PC_CARD", "atmel_at76c502d%s.bin", "Planet WL-3552" },
330 { 0, 0, "OEM/11Mbps Wireless LAN PC Card V-3", "atmel_at76c502%s.bin", "OEM 11Mbps WLAN PCMCIA Card" },
331 { 0, 0, "11WAVE/11WP611AL-E", "atmel_at76c502e%s.bin", "11WAVE WaveBuddy" }
332 };
333
334 static void atmel_config(dev_link_t *link)
335 {
336 client_handle_t handle;
337 tuple_t tuple;
338 cisparse_t parse;
339 local_info_t *dev;
340 int last_fn, last_ret;
341 u_char buf[64];
342 int card_index = -1, done = 0;
343
344 handle = link->handle;
345 dev = link->priv;
346
347 DEBUG(0, "atmel_config(0x%p)\n", link);
348
349 tuple.Attributes = 0;
350 tuple.TupleData = buf;
351 tuple.TupleDataMax = sizeof(buf);
352 tuple.TupleOffset = 0;
353
354 tuple.DesiredTuple = CISTPL_MANFID;
355 if (pcmcia_get_first_tuple(handle, &tuple) == 0) {
356 int i;
357 cistpl_manfid_t *manfid;
358 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
359 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
360 manfid = &(parse.manfid);
361 for (i = 0; i < sizeof(card_table)/sizeof(card_table[0]); i++) {
362 if (!card_table[i].ver1 &&
363 manfid->manf == card_table[i].manf &&
364 manfid->card == card_table[i].card) {
365 card_index = i;
366 done = 1;
367 }
368 }
369 }
370
371 tuple.DesiredTuple = CISTPL_VERS_1;
372 if (!done && (pcmcia_get_first_tuple(handle, &tuple) == 0)) {
373 int i, j, k;
374 cistpl_vers_1_t *ver1;
375 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
376 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
377 ver1 = &(parse.version_1);
378
379 for (i = 0; i < sizeof(card_table)/sizeof(card_table[0]); i++) {
380 for (j = 0; j < ver1->ns; j++) {
381 char *p = card_table[i].ver1;
382 char *q = &ver1->str[ver1->ofs[j]];
383 if (!p)
384 goto mismatch;
385 for (k = 0; k < j; k++) {
386 while ((*p != '\0') && (*p != '/')) p++;
387 if (*p == '\0') {
388 if (*q != '\0')
389 goto mismatch;
390 } else {
391 p++;
392 }
393 }
394 while((*q != '\0') && (*p != '\0') &&
395 (*p != '/') && (*p == *q)) p++, q++;
396 if (((*p != '\0') && *p != '/') || *q != '\0')
397 goto mismatch;
398 }
399 card_index = i;
400 break; /* done */
401
402 mismatch:
403 j = 0; /* dummy stmt to shut up compiler */
404 }
405 }
406
407 /*
408 This reads the card's CONFIG tuple to find its configuration
409 registers.
410 */
411 tuple.DesiredTuple = CISTPL_CONFIG;
412 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
413 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
414 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
415 link->conf.ConfigBase = parse.config.base;
416 link->conf.Present = parse.config.rmask[0];
417
418 /* Configure card */
419 link->state |= DEV_CONFIG;
420
421 /*
422 In this loop, we scan the CIS for configuration table entries,
423 each of which describes a valid card configuration, including
424 voltage, IO window, memory window, and interrupt settings.
425
426 We make no assumptions about the card to be configured: we use
427 just the information available in the CIS. In an ideal world,
428 this would work for any PCMCIA card, but it requires a complete
429 and accurate CIS. In practice, a driver usually "knows" most of
430 these things without consulting the CIS, and most client drivers
431 will only use the CIS to fill in implementation-defined details.
432 */
433 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
434 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
435 while (1) {
436 cistpl_cftable_entry_t dflt = { 0 };
437 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
438 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
439 pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
440 goto next_entry;
441
442 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
443 if (cfg->index == 0) goto next_entry;
444 link->conf.ConfigIndex = cfg->index;
445
446 /* Does this card need audio output? */
447 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
448 link->conf.Attributes |= CONF_ENABLE_SPKR;
449 link->conf.Status = CCSR_AUDIO_ENA;
450 }
451
452 /* Use power settings for Vcc and Vpp if present */
453 /* Note that the CIS values need to be rescaled */
454 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM))
455 link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
456 else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
457 link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;
458
459 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
460 link->conf.Vpp1 = link->conf.Vpp2 =
461 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
462 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
463 link->conf.Vpp1 = link->conf.Vpp2 =
464 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
465
466 /* Do we need to allocate an interrupt? */
467 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
468 link->conf.Attributes |= CONF_ENABLE_IRQ;
469
470 /* IO window settings */
471 link->io.NumPorts1 = link->io.NumPorts2 = 0;
472 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
473 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
474 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
475 if (!(io->flags & CISTPL_IO_8BIT))
476 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
477 if (!(io->flags & CISTPL_IO_16BIT))
478 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
479 link->io.BasePort1 = io->win[0].base;
480 link->io.NumPorts1 = io->win[0].len;
481 if (io->nwin > 1) {
482 link->io.Attributes2 = link->io.Attributes1;
483 link->io.BasePort2 = io->win[1].base;
484 link->io.NumPorts2 = io->win[1].len;
485 }
486 }
487
488 /* This reserves IO space but doesn't actually enable it */
489 if (pcmcia_request_io(link->handle, &link->io) != 0)
490 goto next_entry;
491
492 /* If we got this far, we're cool! */
493 break;
494
495 next_entry:
496 CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
497 }
498
499 /*
500 Allocate an interrupt line. Note that this does not assign a
501 handler to the interrupt, unless the 'Handler' member of the
502 irq structure is initialized.
503 */
504 if (link->conf.Attributes & CONF_ENABLE_IRQ)
505 CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
506
507 /*
508 This actually configures the PCMCIA socket -- setting up
509 the I/O windows and the interrupt mapping, and putting the
510 card and host interface into "Memory and IO" mode.
511 */
512 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
513
514 if (link->irq.AssignedIRQ == 0) {
515 printk(KERN_ALERT
516 "atmel: cannot assign IRQ: check that CONFIG_ISA is set in kernel config.");
517 goto cs_failed;
518 }
519
520 ((local_info_t*)link->priv)->eth_dev =
521 init_atmel_card(link->irq.AssignedIRQ,
522 link->io.BasePort1,
523 card_index == -1 ? NULL : card_table[card_index].firmware,
524 &handle_to_dev(handle),
525 card_present,
526 link);
527 if (!((local_info_t*)link->priv)->eth_dev)
528 goto cs_failed;
529
530 /*
531 At this point, the dev_node_t structure(s) need to be
532 initialized and arranged in a linked list at link->dev.
533 */
534 strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
535 dev->node.major = dev->node.minor = 0;
536 link->dev = &dev->node;
537
538 /* Finally, report what we've done */
539 printk(KERN_INFO "%s: %s%sindex 0x%02x: Vcc %d.%d",
540 dev->node.dev_name,
541 card_index == -1 ? "" : card_table[card_index].name,
542 card_index == -1 ? "" : " ",
543 link->conf.ConfigIndex,
544 link->conf.Vcc/10, link->conf.Vcc%10);
545 if (link->conf.Vpp1)
546 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
547 if (link->conf.Attributes & CONF_ENABLE_IRQ)
548 printk(", irq %d", link->irq.AssignedIRQ);
549 if (link->io.NumPorts1)
550 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
551 link->io.BasePort1+link->io.NumPorts1-1);
552 if (link->io.NumPorts2)
553 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
554 link->io.BasePort2+link->io.NumPorts2-1);
555 printk("\n");
556
557 link->state &= ~DEV_CONFIG_PENDING;
558 return;
559
560 cs_failed:
561 cs_error(link->handle, last_fn, last_ret);
562 atmel_release(link);
563 }
564
565 /*======================================================================
566
567 After a card is removed, atmel_release() will unregister the
568 device, and release the PCMCIA configuration. If the device is
569 still open, this will be postponed until it is closed.
570
571 ======================================================================*/
572
573 static void atmel_release(dev_link_t *link)
574 {
575 struct net_device *dev = ((local_info_t*)link->priv)->eth_dev;
576
577 DEBUG(0, "atmel_release(0x%p)\n", link);
578
579 /* Unlink the device chain */
580 link->dev = NULL;
581
582 if (dev)
583 stop_atmel_card(dev, 0);
584 ((local_info_t*)link->priv)->eth_dev = NULL;
585
586 /* Don't bother checking to see if these succeed or not */
587 pcmcia_release_configuration(link->handle);
588 if (link->io.NumPorts1)
589 pcmcia_release_io(link->handle, &link->io);
590 if (link->irq.AssignedIRQ)
591 pcmcia_release_irq(link->handle, &link->irq);
592 link->state &= ~DEV_CONFIG;
593 }
594
595 /*======================================================================
596
597 The card status event handler. Mostly, this schedules other
598 stuff to run after an event is received.
599
600 When a CARD_REMOVAL event is received, we immediately set a
601 private flag to block future accesses to this device. All the
602 functions that actually access the device should check this flag
603 to make sure the card is still present.
604
605 ======================================================================*/
606
607 static int atmel_event(event_t event, int priority,
608 event_callback_args_t *args)
609 {
610 dev_link_t *link = args->client_data;
611 local_info_t *local = link->priv;
612
613 DEBUG(1, "atmel_event(0x%06x)\n", event);
614
615 switch (event) {
616 case CS_EVENT_CARD_REMOVAL:
617 link->state &= ~DEV_PRESENT;
618 if (link->state & DEV_CONFIG) {
619 netif_device_detach(local->eth_dev);
620 atmel_release(link);
621 }
622 break;
623 case CS_EVENT_CARD_INSERTION:
624 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
625 atmel_config(link);
626 break;
627 case CS_EVENT_PM_SUSPEND:
628 link->state |= DEV_SUSPEND;
629 /* Fall through... */
630 case CS_EVENT_RESET_PHYSICAL:
631 if (link->state & DEV_CONFIG) {
632 netif_device_detach(local->eth_dev);
633 pcmcia_release_configuration(link->handle);
634 }
635 break;
636 case CS_EVENT_PM_RESUME:
637 link->state &= ~DEV_SUSPEND;
638 /* Fall through... */
639 case CS_EVENT_CARD_RESET:
640 if (link->state & DEV_CONFIG) {
641 pcmcia_request_configuration(link->handle, &link->conf);
642 atmel_open(local->eth_dev);
643 netif_device_attach(local->eth_dev);
644 }
645 break;
646 }
647 return 0;
648 } /* atmel_event */
649
650 /*====================================================================*/
651 static struct pcmcia_driver atmel_driver = {
652 .owner = THIS_MODULE,
653 .drv = {
654 .name = "atmel_cs",
655 },
656 .attach = atmel_attach,
657 .detach = atmel_detach,
658 };
659
660 static int atmel_cs_init(void)
661 {
662 return pcmcia_register_driver(&atmel_driver);
663 }
664
665 static void atmel_cs_cleanup(void)
666 {
667 pcmcia_unregister_driver(&atmel_driver);
668 BUG_ON(dev_list != NULL);
669 }
670
671 /*
672 This program is free software; you can redistribute it and/or
673 modify it under the terms of the GNU General Public License
674 as published by the Free Software Foundation; either version 2
675 of the License, or (at your option) any later version.
676
677 This program is distributed in the hope that it will be useful,
678 but WITHOUT ANY WARRANTY; without even the implied warranty of
679 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
680 GNU General Public License for more details.
681
682 In addition:
683
684 Redistribution and use in source and binary forms, with or without
685 modification, are permitted provided that the following conditions
686 are met:
687
688 1. Redistributions of source code must retain the above copyright
689 notice, this list of conditions and the following disclaimer.
690 2. Redistributions in binary form must reproduce the above copyright
691 notice, this list of conditions and the following disclaimer in the
692 documentation and/or other materials provided with the distribution.
693 3. The name of the author may not be used to endorse or promote
694 products derived from this software without specific prior written
695 permission.
696
697 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
698 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
699 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
700 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
701 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
702 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
703 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
704 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
705 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
706 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
707 POSSIBILITY OF SUCH DAMAGE.
708 */
709
710 module_init(atmel_cs_init);
711 module_exit(atmel_cs_cleanup);
712
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