Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/config.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/ioport.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/pm.h> | |
30 | #include <linux/pci.h> | |
31 | #include <linux/device.h> | |
32 | #include <asm/system.h> | |
33 | #include <asm/irq.h> | |
34 | ||
35 | #define IN_CARD_SERVICES | |
36 | #include <pcmcia/version.h> | |
37 | #include <pcmcia/cs_types.h> | |
38 | #include <pcmcia/ss.h> | |
39 | #include <pcmcia/cs.h> | |
40 | #include <pcmcia/bulkmem.h> | |
41 | #include <pcmcia/cistpl.h> | |
42 | #include <pcmcia/cisreg.h> | |
43 | #include <pcmcia/ds.h> | |
44 | #include "cs_internal.h" | |
45 | ||
46 | #ifdef CONFIG_PCI | |
47 | #define PCI_OPT " [pci]" | |
48 | #else | |
49 | #define PCI_OPT "" | |
50 | #endif | |
51 | #ifdef CONFIG_CARDBUS | |
52 | #define CB_OPT " [cardbus]" | |
53 | #else | |
54 | #define CB_OPT "" | |
55 | #endif | |
56 | #ifdef CONFIG_PM | |
57 | #define PM_OPT " [pm]" | |
58 | #else | |
59 | #define PM_OPT "" | |
60 | #endif | |
61 | #if !defined(CONFIG_CARDBUS) && !defined(CONFIG_PCI) && !defined(CONFIG_PM) | |
62 | #define OPTIONS " none" | |
63 | #else | |
64 | #define OPTIONS PCI_OPT CB_OPT PM_OPT | |
65 | #endif | |
66 | ||
67 | static const char *release = "Linux Kernel Card Services"; | |
68 | static const char *options = "options: " OPTIONS; | |
69 | ||
70 | /*====================================================================*/ | |
71 | ||
72 | /* Module parameters */ | |
73 | ||
74 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
75 | MODULE_DESCRIPTION("Linux Kernel Card Services\noptions:" OPTIONS); | |
76 | MODULE_LICENSE("GPL"); | |
77 | ||
78 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
79 | ||
80 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
81 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
82 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
83 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
84 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
85 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
86 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
87 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
88 | ||
89 | /* Access speed for attribute memory windows */ | |
90 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
91 | ||
1da177e4 LT |
92 | #ifdef DEBUG |
93 | static int pc_debug; | |
94 | ||
95 | module_param(pc_debug, int, 0644); | |
96 | ||
97 | int cs_debug_level(int level) | |
98 | { | |
99 | return pc_debug > level; | |
100 | } | |
101 | #endif | |
102 | ||
103 | /*====================================================================*/ | |
104 | ||
105 | socket_state_t dead_socket = { | |
106 | .csc_mask = SS_DETECT, | |
107 | }; | |
108 | ||
109 | ||
110 | /* List of all sockets, protected by a rwsem */ | |
111 | LIST_HEAD(pcmcia_socket_list); | |
112 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); | |
113 | EXPORT_SYMBOL(pcmcia_socket_list); | |
114 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
115 | ||
116 | ||
1da177e4 LT |
117 | /*==================================================================== |
118 | ||
119 | Low-level PC Card interface drivers need to register with Card | |
120 | Services using these calls. | |
121 | ||
122 | ======================================================================*/ | |
123 | ||
124 | /** | |
125 | * socket drivers are expected to use the following callbacks in their | |
126 | * .drv struct: | |
127 | * - pcmcia_socket_dev_suspend | |
128 | * - pcmcia_socket_dev_resume | |
129 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
130 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
131 | */ | |
132 | static int socket_resume(struct pcmcia_socket *skt); | |
133 | static int socket_suspend(struct pcmcia_socket *skt); | |
134 | ||
135 | int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state) | |
136 | { | |
137 | struct pcmcia_socket *socket; | |
138 | ||
139 | down_read(&pcmcia_socket_list_rwsem); | |
140 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
141 | if (socket->dev.dev != dev) | |
142 | continue; | |
143 | down(&socket->skt_sem); | |
144 | socket_suspend(socket); | |
145 | up(&socket->skt_sem); | |
146 | } | |
147 | up_read(&pcmcia_socket_list_rwsem); | |
148 | ||
149 | return 0; | |
150 | } | |
151 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
152 | ||
153 | int pcmcia_socket_dev_resume(struct device *dev) | |
154 | { | |
155 | struct pcmcia_socket *socket; | |
156 | ||
157 | down_read(&pcmcia_socket_list_rwsem); | |
158 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
159 | if (socket->dev.dev != dev) | |
160 | continue; | |
161 | down(&socket->skt_sem); | |
162 | socket_resume(socket); | |
163 | up(&socket->skt_sem); | |
164 | } | |
165 | up_read(&pcmcia_socket_list_rwsem); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
170 | ||
171 | ||
172 | struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt) | |
173 | { | |
174 | struct class_device *cl_dev = class_device_get(&skt->dev); | |
175 | if (!cl_dev) | |
176 | return NULL; | |
177 | skt = class_get_devdata(cl_dev); | |
178 | if (!try_module_get(skt->owner)) { | |
179 | class_device_put(&skt->dev); | |
180 | return NULL; | |
181 | } | |
182 | return (skt); | |
183 | } | |
184 | EXPORT_SYMBOL(pcmcia_get_socket); | |
185 | ||
186 | ||
187 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
188 | { | |
189 | module_put(skt->owner); | |
190 | class_device_put(&skt->dev); | |
191 | } | |
192 | EXPORT_SYMBOL(pcmcia_put_socket); | |
193 | ||
194 | ||
195 | static void pcmcia_release_socket(struct class_device *class_dev) | |
196 | { | |
197 | struct pcmcia_socket *socket = class_get_devdata(class_dev); | |
198 | ||
199 | complete(&socket->socket_released); | |
200 | } | |
201 | ||
202 | static int pccardd(void *__skt); | |
203 | ||
204 | /** | |
205 | * pcmcia_register_socket - add a new pcmcia socket device | |
206 | */ | |
207 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
208 | { | |
209 | int ret; | |
210 | ||
211 | if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops) | |
212 | return -EINVAL; | |
213 | ||
214 | cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops); | |
215 | ||
216 | spin_lock_init(&socket->lock); | |
217 | ||
218 | if (socket->resource_ops->init) { | |
219 | ret = socket->resource_ops->init(socket); | |
220 | if (ret) | |
221 | return (ret); | |
222 | } | |
223 | ||
224 | /* try to obtain a socket number [yes, it gets ugly if we | |
225 | * register more than 2^sizeof(unsigned int) pcmcia | |
226 | * sockets... but the socket number is deprecated | |
227 | * anyways, so I don't care] */ | |
228 | down_write(&pcmcia_socket_list_rwsem); | |
229 | if (list_empty(&pcmcia_socket_list)) | |
230 | socket->sock = 0; | |
231 | else { | |
232 | unsigned int found, i = 1; | |
233 | struct pcmcia_socket *tmp; | |
234 | do { | |
235 | found = 1; | |
236 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
237 | if (tmp->sock == i) | |
238 | found = 0; | |
239 | } | |
240 | i++; | |
241 | } while (!found); | |
242 | socket->sock = i - 1; | |
243 | } | |
244 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
245 | up_write(&pcmcia_socket_list_rwsem); | |
246 | ||
247 | ||
248 | /* set proper values in socket->dev */ | |
249 | socket->dev.class_data = socket; | |
250 | socket->dev.class = &pcmcia_socket_class; | |
251 | snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock); | |
252 | ||
253 | /* base address = 0, map = 0 */ | |
254 | socket->cis_mem.flags = 0; | |
255 | socket->cis_mem.speed = cis_speed; | |
256 | ||
257 | INIT_LIST_HEAD(&socket->cis_cache); | |
258 | ||
259 | init_completion(&socket->socket_released); | |
260 | init_completion(&socket->thread_done); | |
261 | init_waitqueue_head(&socket->thread_wait); | |
262 | init_MUTEX(&socket->skt_sem); | |
263 | spin_lock_init(&socket->thread_lock); | |
264 | ||
265 | ret = kernel_thread(pccardd, socket, CLONE_KERNEL); | |
266 | if (ret < 0) | |
267 | goto err; | |
268 | ||
269 | wait_for_completion(&socket->thread_done); | |
270 | if(!socket->thread) { | |
271 | printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket); | |
272 | return -EIO; | |
273 | } | |
274 | pcmcia_parse_events(socket, SS_DETECT); | |
275 | ||
276 | return 0; | |
277 | ||
278 | err: | |
279 | down_write(&pcmcia_socket_list_rwsem); | |
280 | list_del(&socket->socket_list); | |
281 | up_write(&pcmcia_socket_list_rwsem); | |
282 | return ret; | |
283 | } /* pcmcia_register_socket */ | |
284 | EXPORT_SYMBOL(pcmcia_register_socket); | |
285 | ||
286 | ||
287 | /** | |
288 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
289 | */ | |
290 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
291 | { | |
292 | if (!socket) | |
293 | return; | |
294 | ||
295 | cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops); | |
296 | ||
297 | if (socket->thread) { | |
298 | init_completion(&socket->thread_done); | |
299 | socket->thread = NULL; | |
300 | wake_up(&socket->thread_wait); | |
301 | wait_for_completion(&socket->thread_done); | |
302 | } | |
303 | release_cis_mem(socket); | |
304 | ||
305 | /* remove from our own list */ | |
306 | down_write(&pcmcia_socket_list_rwsem); | |
307 | list_del(&socket->socket_list); | |
308 | up_write(&pcmcia_socket_list_rwsem); | |
309 | ||
310 | /* wait for sysfs to drop all references */ | |
311 | release_resource_db(socket); | |
312 | wait_for_completion(&socket->socket_released); | |
313 | } /* pcmcia_unregister_socket */ | |
314 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
315 | ||
316 | ||
317 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
318 | { | |
319 | struct pcmcia_socket *s; | |
320 | ||
321 | down_read(&pcmcia_socket_list_rwsem); | |
322 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
323 | if (s->sock == nr) { | |
324 | up_read(&pcmcia_socket_list_rwsem); | |
325 | return s; | |
326 | } | |
327 | up_read(&pcmcia_socket_list_rwsem); | |
328 | ||
329 | return NULL; | |
330 | ||
331 | } | |
332 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
333 | ||
334 | ||
335 | /*====================================================================== | |
336 | ||
337 | socket_setup() and shutdown_socket() are called by the main event | |
338 | handler when card insertion and removal events are received. | |
339 | socket_setup() turns on socket power and resets the socket, in two stages. | |
340 | shutdown_socket() unconfigures a socket and turns off socket power. | |
341 | ||
342 | ======================================================================*/ | |
343 | ||
344 | static void shutdown_socket(struct pcmcia_socket *s) | |
345 | { | |
346 | cs_dbg(s, 1, "shutdown_socket\n"); | |
347 | ||
348 | /* Blank out the socket state */ | |
349 | s->socket = dead_socket; | |
350 | s->ops->init(s); | |
351 | s->ops->set_socket(s, &s->socket); | |
352 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
353 | s->lock_count = 0; | |
354 | destroy_cis_cache(s); | |
355 | #ifdef CONFIG_CARDBUS | |
356 | cb_free(s); | |
357 | #endif | |
358 | s->functions = 0; | |
359 | if (s->config) { | |
360 | kfree(s->config); | |
361 | s->config = NULL; | |
362 | } | |
363 | ||
364 | { | |
365 | int status; | |
366 | s->ops->get_status(s, &status); | |
367 | if (status & SS_POWERON) { | |
368 | printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s); | |
369 | } | |
370 | } | |
371 | } /* shutdown_socket */ | |
372 | ||
373 | /*====================================================================== | |
374 | ||
375 | The central event handler. Send_event() sends an event to the | |
376 | 16-bit subsystem, which then calls the relevant device drivers. | |
377 | Parse_events() interprets the event bits from | |
378 | a card status change report. Do_shutdown() handles the high | |
379 | priority stuff associated with a card removal. | |
380 | ||
381 | ======================================================================*/ | |
382 | ||
383 | ||
384 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
385 | ||
386 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
387 | { | |
388 | int ret; | |
389 | ||
390 | if (s->state & SOCKET_CARDBUS) | |
391 | return 0; | |
392 | ||
393 | cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n", | |
394 | event, priority, s->callback); | |
395 | ||
396 | if (!s->callback) | |
397 | return 0; | |
398 | if (!try_module_get(s->callback->owner)) | |
399 | return 0; | |
400 | ||
401 | ret = s->callback->event(s, event, priority); | |
402 | ||
403 | module_put(s->callback->owner); | |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
408 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
409 | { | |
410 | cs_dbg(skt, 4, "remove_drivers\n"); | |
411 | ||
412 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
413 | } | |
414 | ||
415 | static void socket_shutdown(struct pcmcia_socket *skt) | |
416 | { | |
417 | cs_dbg(skt, 4, "shutdown\n"); | |
418 | ||
419 | socket_remove_drivers(skt); | |
420 | skt->state &= SOCKET_INUSE|SOCKET_PRESENT; | |
421 | msleep(shutdown_delay * 10); | |
422 | skt->state &= SOCKET_INUSE; | |
423 | shutdown_socket(skt); | |
424 | } | |
425 | ||
426 | static int socket_reset(struct pcmcia_socket *skt) | |
427 | { | |
428 | int status, i; | |
429 | ||
430 | cs_dbg(skt, 4, "reset\n"); | |
431 | ||
432 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
433 | skt->ops->set_socket(skt, &skt->socket); | |
434 | udelay((long)reset_time); | |
435 | ||
436 | skt->socket.flags &= ~SS_RESET; | |
437 | skt->ops->set_socket(skt, &skt->socket); | |
438 | ||
439 | msleep(unreset_delay * 10); | |
440 | for (i = 0; i < unreset_limit; i++) { | |
441 | skt->ops->get_status(skt, &status); | |
442 | ||
443 | if (!(status & SS_DETECT)) | |
444 | return CS_NO_CARD; | |
445 | ||
446 | if (status & SS_READY) | |
447 | return CS_SUCCESS; | |
448 | ||
449 | msleep(unreset_check * 10); | |
450 | } | |
451 | ||
452 | cs_err(skt, "time out after reset.\n"); | |
453 | return CS_GENERAL_FAILURE; | |
454 | } | |
455 | ||
456 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) | |
457 | { | |
458 | int status, i; | |
459 | ||
460 | cs_dbg(skt, 4, "setup\n"); | |
461 | ||
462 | skt->ops->get_status(skt, &status); | |
463 | if (!(status & SS_DETECT)) | |
464 | return CS_NO_CARD; | |
465 | ||
466 | msleep(initial_delay * 10); | |
467 | ||
468 | for (i = 0; i < 100; i++) { | |
469 | skt->ops->get_status(skt, &status); | |
470 | if (!(status & SS_DETECT)) | |
471 | return CS_NO_CARD; | |
472 | ||
473 | if (!(status & SS_PENDING)) | |
474 | break; | |
475 | ||
476 | msleep(100); | |
477 | } | |
478 | ||
479 | if (status & SS_PENDING) { | |
480 | cs_err(skt, "voltage interrogation timed out.\n"); | |
481 | return CS_GENERAL_FAILURE; | |
482 | } | |
483 | ||
484 | if (status & SS_CARDBUS) { | |
485 | skt->state |= SOCKET_CARDBUS; | |
486 | #ifndef CONFIG_CARDBUS | |
487 | cs_err(skt, "cardbus cards are not supported.\n"); | |
488 | return CS_BAD_TYPE; | |
489 | #endif | |
490 | } | |
491 | ||
492 | /* | |
493 | * Decode the card voltage requirements, and apply power to the card. | |
494 | */ | |
495 | if (status & SS_3VCARD) | |
496 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
497 | else if (!(status & SS_XVCARD)) | |
498 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
499 | else { | |
500 | cs_err(skt, "unsupported voltage key.\n"); | |
501 | return CS_BAD_TYPE; | |
502 | } | |
fa912bcb DR |
503 | |
504 | if (skt->power_hook) | |
505 | skt->power_hook(skt, HOOK_POWER_PRE); | |
506 | ||
1da177e4 LT |
507 | skt->socket.flags = 0; |
508 | skt->ops->set_socket(skt, &skt->socket); | |
509 | ||
510 | /* | |
511 | * Wait "vcc_settle" for the supply to stabilise. | |
512 | */ | |
513 | msleep(vcc_settle * 10); | |
514 | ||
515 | skt->ops->get_status(skt, &status); | |
516 | if (!(status & SS_POWERON)) { | |
517 | cs_err(skt, "unable to apply power.\n"); | |
518 | return CS_BAD_TYPE; | |
519 | } | |
520 | ||
fa912bcb DR |
521 | status = socket_reset(skt); |
522 | ||
523 | if (skt->power_hook) | |
524 | skt->power_hook(skt, HOOK_POWER_POST); | |
525 | ||
526 | return status; | |
1da177e4 LT |
527 | } |
528 | ||
529 | /* | |
530 | * Handle card insertion. Setup the socket, reset the card, | |
531 | * and then tell the rest of PCMCIA that a card is present. | |
532 | */ | |
533 | static int socket_insert(struct pcmcia_socket *skt) | |
534 | { | |
535 | int ret; | |
536 | ||
537 | cs_dbg(skt, 4, "insert\n"); | |
538 | ||
539 | if (!cs_socket_get(skt)) | |
540 | return CS_NO_CARD; | |
541 | ||
542 | ret = socket_setup(skt, setup_delay); | |
543 | if (ret == CS_SUCCESS) { | |
544 | skt->state |= SOCKET_PRESENT; | |
545 | #ifdef CONFIG_CARDBUS | |
546 | if (skt->state & SOCKET_CARDBUS) { | |
547 | cb_alloc(skt); | |
548 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
549 | } | |
550 | #endif | |
551 | cs_dbg(skt, 4, "insert done\n"); | |
552 | ||
553 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
554 | } else { | |
555 | socket_shutdown(skt); | |
556 | cs_socket_put(skt); | |
557 | } | |
558 | ||
559 | return ret; | |
560 | } | |
561 | ||
562 | static int socket_suspend(struct pcmcia_socket *skt) | |
563 | { | |
564 | if (skt->state & SOCKET_SUSPEND) | |
565 | return CS_IN_USE; | |
566 | ||
567 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
568 | skt->socket = dead_socket; | |
569 | skt->ops->set_socket(skt, &skt->socket); | |
570 | if (skt->ops->suspend) | |
571 | skt->ops->suspend(skt); | |
572 | skt->state |= SOCKET_SUSPEND; | |
573 | ||
574 | return CS_SUCCESS; | |
575 | } | |
576 | ||
577 | /* | |
578 | * Resume a socket. If a card is present, verify its CIS against | |
579 | * our cached copy. If they are different, the card has been | |
580 | * replaced, and we need to tell the drivers. | |
581 | */ | |
582 | static int socket_resume(struct pcmcia_socket *skt) | |
583 | { | |
584 | int ret; | |
585 | ||
586 | if (!(skt->state & SOCKET_SUSPEND)) | |
587 | return CS_IN_USE; | |
588 | ||
589 | skt->socket = dead_socket; | |
590 | skt->ops->init(skt); | |
591 | skt->ops->set_socket(skt, &skt->socket); | |
592 | ||
593 | if (!(skt->state & SOCKET_PRESENT)) { | |
594 | skt->state &= ~SOCKET_SUSPEND; | |
595 | return socket_insert(skt); | |
596 | } | |
597 | ||
598 | ret = socket_setup(skt, resume_delay); | |
599 | if (ret == CS_SUCCESS) { | |
600 | /* | |
601 | * FIXME: need a better check here for cardbus cards. | |
602 | */ | |
603 | if (verify_cis_cache(skt) != 0) { | |
604 | cs_dbg(skt, 4, "cis mismatch - different card\n"); | |
605 | socket_remove_drivers(skt); | |
606 | destroy_cis_cache(skt); | |
607 | /* | |
608 | * Workaround: give DS time to schedule removal. | |
609 | * Remove me once the 100ms delay is eliminated | |
610 | * in ds.c | |
611 | */ | |
612 | msleep(200); | |
613 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
614 | } else { | |
615 | cs_dbg(skt, 4, "cis matches cache\n"); | |
616 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); | |
617 | } | |
618 | } else { | |
619 | socket_shutdown(skt); | |
620 | cs_socket_put(skt); | |
621 | } | |
622 | ||
623 | skt->state &= ~SOCKET_SUSPEND; | |
624 | ||
625 | return CS_SUCCESS; | |
626 | } | |
627 | ||
628 | static void socket_remove(struct pcmcia_socket *skt) | |
629 | { | |
630 | socket_shutdown(skt); | |
631 | cs_socket_put(skt); | |
632 | } | |
633 | ||
634 | /* | |
635 | * Process a socket card detect status change. | |
636 | * | |
637 | * If we don't have a card already present, delay the detect event for | |
638 | * about 20ms (to be on the safe side) before reading the socket status. | |
639 | * | |
640 | * Some i82365-based systems send multiple SS_DETECT events during card | |
641 | * insertion, and the "card present" status bit seems to bounce. This | |
642 | * will probably be true with GPIO-based card detection systems after | |
643 | * the product has aged. | |
644 | */ | |
645 | static void socket_detect_change(struct pcmcia_socket *skt) | |
646 | { | |
647 | if (!(skt->state & SOCKET_SUSPEND)) { | |
648 | int status; | |
649 | ||
650 | if (!(skt->state & SOCKET_PRESENT)) | |
651 | msleep(20); | |
652 | ||
653 | skt->ops->get_status(skt, &status); | |
654 | if ((skt->state & SOCKET_PRESENT) && | |
655 | !(status & SS_DETECT)) | |
656 | socket_remove(skt); | |
657 | if (!(skt->state & SOCKET_PRESENT) && | |
658 | (status & SS_DETECT)) | |
659 | socket_insert(skt); | |
660 | } | |
661 | } | |
662 | ||
663 | static int pccardd(void *__skt) | |
664 | { | |
665 | struct pcmcia_socket *skt = __skt; | |
666 | DECLARE_WAITQUEUE(wait, current); | |
667 | int ret; | |
668 | ||
669 | daemonize("pccardd"); | |
670 | ||
671 | skt->thread = current; | |
672 | skt->socket = dead_socket; | |
673 | skt->ops->init(skt); | |
674 | skt->ops->set_socket(skt, &skt->socket); | |
675 | ||
676 | /* register with the device core */ | |
677 | ret = class_device_register(&skt->dev); | |
678 | if (ret) { | |
679 | printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n", | |
680 | skt); | |
681 | skt->thread = NULL; | |
682 | complete_and_exit(&skt->thread_done, 0); | |
683 | } | |
684 | complete(&skt->thread_done); | |
685 | ||
686 | add_wait_queue(&skt->thread_wait, &wait); | |
687 | for (;;) { | |
688 | unsigned long flags; | |
689 | unsigned int events; | |
690 | ||
691 | set_current_state(TASK_INTERRUPTIBLE); | |
692 | ||
693 | spin_lock_irqsave(&skt->thread_lock, flags); | |
694 | events = skt->thread_events; | |
695 | skt->thread_events = 0; | |
696 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
697 | ||
698 | if (events) { | |
699 | down(&skt->skt_sem); | |
700 | if (events & SS_DETECT) | |
701 | socket_detect_change(skt); | |
702 | if (events & SS_BATDEAD) | |
703 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
704 | if (events & SS_BATWARN) | |
705 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
706 | if (events & SS_READY) | |
707 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
708 | up(&skt->skt_sem); | |
709 | continue; | |
710 | } | |
711 | ||
712 | schedule(); | |
3e1d1d28 | 713 | try_to_freeze(); |
1da177e4 LT |
714 | |
715 | if (!skt->thread) | |
716 | break; | |
717 | } | |
718 | remove_wait_queue(&skt->thread_wait, &wait); | |
719 | ||
720 | /* remove from the device core */ | |
721 | class_device_unregister(&skt->dev); | |
722 | ||
723 | complete_and_exit(&skt->thread_done, 0); | |
724 | } | |
725 | ||
726 | /* | |
727 | * Yenta (at least) probes interrupts before registering the socket and | |
728 | * starting the handler thread. | |
729 | */ | |
730 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
731 | { | |
732 | cs_dbg(s, 4, "parse_events: events %08x\n", events); | |
733 | if (s->thread) { | |
734 | spin_lock(&s->thread_lock); | |
735 | s->thread_events |= events; | |
736 | spin_unlock(&s->thread_lock); | |
737 | ||
738 | wake_up(&s->thread_wait); | |
739 | } | |
740 | } /* pcmcia_parse_events */ | |
741 | ||
742 | ||
1da177e4 LT |
743 | /*===================================================================== |
744 | ||
745 | Return the PCI device associated with a card.. | |
746 | ||
747 | ======================================================================*/ | |
748 | ||
749 | #ifdef CONFIG_CARDBUS | |
750 | ||
751 | struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s) | |
752 | { | |
753 | if (!s || !(s->state & SOCKET_CARDBUS)) | |
754 | return NULL; | |
755 | ||
756 | return s->cb_dev->subordinate; | |
757 | } | |
758 | ||
759 | EXPORT_SYMBOL(pcmcia_lookup_bus); | |
760 | ||
761 | #endif | |
762 | ||
1da177e4 LT |
763 | |
764 | /* register pcmcia_callback */ | |
765 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
766 | { | |
767 | int ret = 0; | |
768 | ||
769 | /* s->skt_sem also protects s->callback */ | |
770 | down(&s->skt_sem); | |
771 | ||
772 | if (c) { | |
773 | /* registration */ | |
774 | if (s->callback) { | |
775 | ret = -EBUSY; | |
776 | goto err; | |
777 | } | |
778 | ||
779 | s->callback = c; | |
780 | ||
781 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
782 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
783 | } else | |
784 | s->callback = NULL; | |
785 | err: | |
786 | up(&s->skt_sem); | |
787 | ||
788 | return ret; | |
789 | } | |
790 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
791 | ||
1da177e4 LT |
792 | |
793 | /*====================================================================== | |
794 | ||
795 | I'm not sure which "reset" function this is supposed to use, | |
796 | but for now, it uses the low-level interface's reset, not the | |
797 | CIS register. | |
798 | ||
799 | ======================================================================*/ | |
800 | ||
801 | int pccard_reset_card(struct pcmcia_socket *skt) | |
802 | { | |
803 | int ret; | |
804 | ||
805 | cs_dbg(skt, 1, "resetting socket\n"); | |
806 | ||
807 | down(&skt->skt_sem); | |
808 | do { | |
809 | if (!(skt->state & SOCKET_PRESENT)) { | |
810 | ret = CS_NO_CARD; | |
811 | break; | |
812 | } | |
813 | if (skt->state & SOCKET_SUSPEND) { | |
814 | ret = CS_IN_USE; | |
815 | break; | |
816 | } | |
817 | if (skt->state & SOCKET_CARDBUS) { | |
818 | ret = CS_UNSUPPORTED_FUNCTION; | |
819 | break; | |
820 | } | |
821 | ||
822 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
823 | if (ret == 0) { | |
824 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
825 | if (socket_reset(skt) == CS_SUCCESS) | |
826 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); | |
827 | } | |
828 | ||
829 | ret = CS_SUCCESS; | |
830 | } while (0); | |
831 | up(&skt->skt_sem); | |
832 | ||
833 | return ret; | |
834 | } /* reset_card */ | |
835 | EXPORT_SYMBOL(pccard_reset_card); | |
836 | ||
837 | /*====================================================================== | |
838 | ||
839 | These shut down or wake up a socket. They are sort of user | |
840 | initiated versions of the APM suspend and resume actions. | |
841 | ||
842 | ======================================================================*/ | |
843 | ||
844 | int pcmcia_suspend_card(struct pcmcia_socket *skt) | |
845 | { | |
846 | int ret; | |
847 | ||
848 | cs_dbg(skt, 1, "suspending socket\n"); | |
849 | ||
850 | down(&skt->skt_sem); | |
851 | do { | |
852 | if (!(skt->state & SOCKET_PRESENT)) { | |
853 | ret = CS_NO_CARD; | |
854 | break; | |
855 | } | |
856 | if (skt->state & SOCKET_CARDBUS) { | |
857 | ret = CS_UNSUPPORTED_FUNCTION; | |
858 | break; | |
859 | } | |
860 | ret = socket_suspend(skt); | |
861 | } while (0); | |
862 | up(&skt->skt_sem); | |
863 | ||
864 | return ret; | |
865 | } /* suspend_card */ | |
866 | ||
867 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
868 | { | |
869 | int ret; | |
870 | ||
871 | cs_dbg(skt, 1, "waking up socket\n"); | |
872 | ||
873 | down(&skt->skt_sem); | |
874 | do { | |
875 | if (!(skt->state & SOCKET_PRESENT)) { | |
876 | ret = CS_NO_CARD; | |
877 | break; | |
878 | } | |
879 | if (skt->state & SOCKET_CARDBUS) { | |
880 | ret = CS_UNSUPPORTED_FUNCTION; | |
881 | break; | |
882 | } | |
883 | ret = socket_resume(skt); | |
884 | } while (0); | |
885 | up(&skt->skt_sem); | |
886 | ||
887 | return ret; | |
888 | } /* resume_card */ | |
889 | ||
890 | /*====================================================================== | |
891 | ||
892 | These handle user requests to eject or insert a card. | |
893 | ||
894 | ======================================================================*/ | |
895 | ||
896 | int pcmcia_eject_card(struct pcmcia_socket *skt) | |
897 | { | |
898 | int ret; | |
899 | ||
900 | cs_dbg(skt, 1, "user eject request\n"); | |
901 | ||
902 | down(&skt->skt_sem); | |
903 | do { | |
904 | if (!(skt->state & SOCKET_PRESENT)) { | |
905 | ret = -ENODEV; | |
906 | break; | |
907 | } | |
908 | ||
909 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
910 | if (ret != 0) { | |
911 | ret = -EINVAL; | |
912 | break; | |
913 | } | |
914 | ||
915 | socket_remove(skt); | |
916 | ret = 0; | |
917 | } while (0); | |
918 | up(&skt->skt_sem); | |
919 | ||
920 | return ret; | |
921 | } /* eject_card */ | |
922 | ||
923 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
924 | { | |
925 | int ret; | |
926 | ||
927 | cs_dbg(skt, 1, "user insert request\n"); | |
928 | ||
929 | down(&skt->skt_sem); | |
930 | do { | |
931 | if (skt->state & SOCKET_PRESENT) { | |
932 | ret = -EBUSY; | |
933 | break; | |
934 | } | |
935 | if (socket_insert(skt) == CS_NO_CARD) { | |
936 | ret = -ENODEV; | |
937 | break; | |
938 | } | |
939 | ret = 0; | |
940 | } while (0); | |
941 | up(&skt->skt_sem); | |
942 | ||
943 | return ret; | |
944 | } /* insert_card */ | |
945 | ||
3ee13937 DB |
946 | static int pcmcia_socket_hotplug(struct class_device *dev, char **envp, |
947 | int num_envp, char *buffer, int buffer_size) | |
948 | { | |
949 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
950 | int i = 0, length = 0; | |
951 | ||
952 | if (add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, | |
953 | &length, "SOCKET_NO=%u", s->sock)) | |
954 | return -ENOMEM; | |
955 | ||
956 | envp[i] = NULL; | |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
1da177e4 LT |
961 | /*====================================================================== |
962 | ||
963 | OS-specific module glue goes here | |
964 | ||
965 | ======================================================================*/ | |
966 | /* in alpha order */ | |
967 | EXPORT_SYMBOL(pcmcia_eject_card); | |
1da177e4 | 968 | EXPORT_SYMBOL(pcmcia_insert_card); |
1da177e4 | 969 | EXPORT_SYMBOL(pcmcia_replace_cis); |
1da177e4 LT |
970 | EXPORT_SYMBOL(pcmcia_resume_card); |
971 | EXPORT_SYMBOL(pcmcia_suspend_card); | |
972 | ||
973 | EXPORT_SYMBOL(dead_socket); | |
974 | EXPORT_SYMBOL(pcmcia_parse_events); | |
975 | ||
976 | struct class pcmcia_socket_class = { | |
977 | .name = "pcmcia_socket", | |
3ee13937 | 978 | .hotplug = pcmcia_socket_hotplug, |
1da177e4 LT |
979 | .release = pcmcia_release_socket, |
980 | }; | |
981 | EXPORT_SYMBOL(pcmcia_socket_class); | |
982 | ||
983 | ||
984 | static int __init init_pcmcia_cs(void) | |
985 | { | |
986 | int ret; | |
987 | printk(KERN_INFO "%s\n", release); | |
988 | printk(KERN_INFO " %s\n", options); | |
989 | ||
990 | ret = class_register(&pcmcia_socket_class); | |
991 | if (ret) | |
992 | return (ret); | |
993 | return class_interface_register(&pccard_sysfs_interface); | |
994 | } | |
995 | ||
996 | static void __exit exit_pcmcia_cs(void) | |
997 | { | |
998 | printk(KERN_INFO "unloading Kernel Card Services\n"); | |
999 | class_interface_unregister(&pccard_sysfs_interface); | |
1000 | class_unregister(&pcmcia_socket_class); | |
1001 | } | |
1002 | ||
1003 | subsys_initcall(init_pcmcia_cs); | |
1004 | module_exit(exit_pcmcia_cs); | |
1005 | ||
1006 | /*====================================================================*/ | |
1007 |