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> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/device.h> | |
1da9ab73 | 31 | #include <linux/kthread.h> |
1da177e4 LT |
32 | #include <asm/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
35 | #define IN_CARD_SERVICES | |
1da177e4 LT |
36 | #include <pcmcia/cs_types.h> |
37 | #include <pcmcia/ss.h> | |
38 | #include <pcmcia/cs.h> | |
39 | #include <pcmcia/bulkmem.h> | |
40 | #include <pcmcia/cistpl.h> | |
41 | #include <pcmcia/cisreg.h> | |
42 | #include <pcmcia/ds.h> | |
43 | #include "cs_internal.h" | |
44 | ||
1da177e4 LT |
45 | |
46 | /* Module parameters */ | |
47 | ||
48 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 49 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
50 | MODULE_LICENSE("GPL"); |
51 | ||
52 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
53 | ||
54 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
55 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
56 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
57 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
58 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
59 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
60 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
61 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
62 | ||
63 | /* Access speed for attribute memory windows */ | |
64 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
65 | ||
1da177e4 LT |
66 | #ifdef DEBUG |
67 | static int pc_debug; | |
68 | ||
69 | module_param(pc_debug, int, 0644); | |
70 | ||
71 | int cs_debug_level(int level) | |
72 | { | |
73 | return pc_debug > level; | |
74 | } | |
75 | #endif | |
76 | ||
1da177e4 LT |
77 | |
78 | socket_state_t dead_socket = { | |
79 | .csc_mask = SS_DETECT, | |
80 | }; | |
33519ddd | 81 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
82 | |
83 | ||
84 | /* List of all sockets, protected by a rwsem */ | |
85 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 86 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 87 | |
33519ddd DB |
88 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
89 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 90 | |
1da177e4 LT |
91 | |
92 | /** | |
33519ddd DB |
93 | * Low-level PCMCIA socket drivers need to register with the PCCard |
94 | * core using pcmcia_register_socket. | |
95 | * | |
96 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
97 | * .drv struct: |
98 | * - pcmcia_socket_dev_suspend | |
99 | * - pcmcia_socket_dev_resume | |
100 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
101 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
102 | */ | |
103 | static int socket_resume(struct pcmcia_socket *skt); | |
104 | static int socket_suspend(struct pcmcia_socket *skt); | |
105 | ||
106 | int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state) | |
107 | { | |
108 | struct pcmcia_socket *socket; | |
109 | ||
110 | down_read(&pcmcia_socket_list_rwsem); | |
111 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
112 | if (socket->dev.dev != dev) | |
113 | continue; | |
7fe908dd | 114 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 115 | socket_suspend(socket); |
7fe908dd | 116 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
117 | } |
118 | up_read(&pcmcia_socket_list_rwsem); | |
119 | ||
120 | return 0; | |
121 | } | |
122 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
123 | ||
124 | int pcmcia_socket_dev_resume(struct device *dev) | |
125 | { | |
126 | struct pcmcia_socket *socket; | |
127 | ||
128 | down_read(&pcmcia_socket_list_rwsem); | |
129 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
130 | if (socket->dev.dev != dev) | |
131 | continue; | |
7fe908dd | 132 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 133 | socket_resume(socket); |
7fe908dd | 134 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
135 | } |
136 | up_read(&pcmcia_socket_list_rwsem); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
141 | ||
142 | ||
143 | struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt) | |
144 | { | |
145 | struct class_device *cl_dev = class_device_get(&skt->dev); | |
146 | if (!cl_dev) | |
147 | return NULL; | |
148 | skt = class_get_devdata(cl_dev); | |
149 | if (!try_module_get(skt->owner)) { | |
150 | class_device_put(&skt->dev); | |
151 | return NULL; | |
152 | } | |
153 | return (skt); | |
154 | } | |
155 | EXPORT_SYMBOL(pcmcia_get_socket); | |
156 | ||
157 | ||
158 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
159 | { | |
160 | module_put(skt->owner); | |
161 | class_device_put(&skt->dev); | |
162 | } | |
163 | EXPORT_SYMBOL(pcmcia_put_socket); | |
164 | ||
165 | ||
166 | static void pcmcia_release_socket(struct class_device *class_dev) | |
167 | { | |
168 | struct pcmcia_socket *socket = class_get_devdata(class_dev); | |
169 | ||
170 | complete(&socket->socket_released); | |
171 | } | |
172 | ||
173 | static int pccardd(void *__skt); | |
174 | ||
175 | /** | |
176 | * pcmcia_register_socket - add a new pcmcia socket device | |
177 | */ | |
178 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
179 | { | |
1da9ab73 | 180 | struct task_struct *tsk; |
1da177e4 LT |
181 | int ret; |
182 | ||
183 | if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops) | |
184 | return -EINVAL; | |
185 | ||
186 | cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops); | |
187 | ||
188 | spin_lock_init(&socket->lock); | |
189 | ||
190 | if (socket->resource_ops->init) { | |
191 | ret = socket->resource_ops->init(socket); | |
192 | if (ret) | |
193 | return (ret); | |
194 | } | |
195 | ||
196 | /* try to obtain a socket number [yes, it gets ugly if we | |
33519ddd DB |
197 | * register more than 2^sizeof(unsigned int) pcmcia |
198 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
199 | * anyways, so I don't care] */ |
200 | down_write(&pcmcia_socket_list_rwsem); | |
201 | if (list_empty(&pcmcia_socket_list)) | |
202 | socket->sock = 0; | |
203 | else { | |
204 | unsigned int found, i = 1; | |
205 | struct pcmcia_socket *tmp; | |
206 | do { | |
207 | found = 1; | |
208 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
209 | if (tmp->sock == i) | |
210 | found = 0; | |
211 | } | |
212 | i++; | |
213 | } while (!found); | |
214 | socket->sock = i - 1; | |
215 | } | |
216 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
217 | up_write(&pcmcia_socket_list_rwsem); | |
218 | ||
5bc6b68a RK |
219 | #ifndef CONFIG_CARDBUS |
220 | /* | |
221 | * If we do not support Cardbus, ensure that | |
222 | * the Cardbus socket capability is disabled. | |
223 | */ | |
224 | socket->features &= ~SS_CAP_CARDBUS; | |
225 | #endif | |
1da177e4 LT |
226 | |
227 | /* set proper values in socket->dev */ | |
228 | socket->dev.class_data = socket; | |
229 | socket->dev.class = &pcmcia_socket_class; | |
230 | snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock); | |
231 | ||
232 | /* base address = 0, map = 0 */ | |
233 | socket->cis_mem.flags = 0; | |
234 | socket->cis_mem.speed = cis_speed; | |
235 | ||
236 | INIT_LIST_HEAD(&socket->cis_cache); | |
237 | ||
238 | init_completion(&socket->socket_released); | |
239 | init_completion(&socket->thread_done); | |
240 | init_waitqueue_head(&socket->thread_wait); | |
7fe908dd | 241 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
242 | spin_lock_init(&socket->thread_lock); |
243 | ||
1da9ab73 SH |
244 | tsk = kthread_run(pccardd, socket, "pccardd"); |
245 | if (IS_ERR(tsk)) { | |
246 | ret = PTR_ERR(tsk); | |
1da177e4 | 247 | goto err; |
1da9ab73 | 248 | } |
1da177e4 LT |
249 | |
250 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 251 | if (!socket->thread) { |
1da177e4 LT |
252 | printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket); |
253 | return -EIO; | |
254 | } | |
1da9ab73 | 255 | |
1da177e4 LT |
256 | pcmcia_parse_events(socket, SS_DETECT); |
257 | ||
258 | return 0; | |
259 | ||
260 | err: | |
261 | down_write(&pcmcia_socket_list_rwsem); | |
262 | list_del(&socket->socket_list); | |
263 | up_write(&pcmcia_socket_list_rwsem); | |
264 | return ret; | |
265 | } /* pcmcia_register_socket */ | |
266 | EXPORT_SYMBOL(pcmcia_register_socket); | |
267 | ||
268 | ||
269 | /** | |
270 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
271 | */ | |
272 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
273 | { | |
274 | if (!socket) | |
275 | return; | |
276 | ||
277 | cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops); | |
278 | ||
279 | if (socket->thread) { | |
1da177e4 | 280 | wake_up(&socket->thread_wait); |
1da9ab73 | 281 | kthread_stop(socket->thread); |
1da177e4 LT |
282 | } |
283 | release_cis_mem(socket); | |
284 | ||
285 | /* remove from our own list */ | |
286 | down_write(&pcmcia_socket_list_rwsem); | |
287 | list_del(&socket->socket_list); | |
288 | up_write(&pcmcia_socket_list_rwsem); | |
289 | ||
290 | /* wait for sysfs to drop all references */ | |
291 | release_resource_db(socket); | |
292 | wait_for_completion(&socket->socket_released); | |
293 | } /* pcmcia_unregister_socket */ | |
294 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
295 | ||
296 | ||
297 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
298 | { | |
299 | struct pcmcia_socket *s; | |
300 | ||
301 | down_read(&pcmcia_socket_list_rwsem); | |
302 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
303 | if (s->sock == nr) { | |
304 | up_read(&pcmcia_socket_list_rwsem); | |
305 | return s; | |
306 | } | |
307 | up_read(&pcmcia_socket_list_rwsem); | |
308 | ||
309 | return NULL; | |
310 | ||
311 | } | |
312 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
313 | ||
33519ddd DB |
314 | /** |
315 | * The central event handler. Send_event() sends an event to the | |
316 | * 16-bit subsystem, which then calls the relevant device drivers. | |
317 | * Parse_events() interprets the event bits from | |
318 | * a card status change report. Do_shutdown() handles the high | |
319 | * priority stuff associated with a card removal. | |
320 | */ | |
1da177e4 LT |
321 | |
322 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
323 | ||
324 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
325 | { | |
326 | int ret; | |
327 | ||
328 | if (s->state & SOCKET_CARDBUS) | |
329 | return 0; | |
330 | ||
331 | cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n", | |
332 | event, priority, s->callback); | |
333 | ||
334 | if (!s->callback) | |
335 | return 0; | |
336 | if (!try_module_get(s->callback->owner)) | |
337 | return 0; | |
338 | ||
339 | ret = s->callback->event(s, event, priority); | |
340 | ||
341 | module_put(s->callback->owner); | |
342 | ||
343 | return ret; | |
344 | } | |
345 | ||
346 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
347 | { | |
348 | cs_dbg(skt, 4, "remove_drivers\n"); | |
349 | ||
350 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
351 | } | |
352 | ||
1da177e4 LT |
353 | static int socket_reset(struct pcmcia_socket *skt) |
354 | { | |
355 | int status, i; | |
356 | ||
357 | cs_dbg(skt, 4, "reset\n"); | |
358 | ||
359 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
360 | skt->ops->set_socket(skt, &skt->socket); | |
361 | udelay((long)reset_time); | |
362 | ||
363 | skt->socket.flags &= ~SS_RESET; | |
364 | skt->ops->set_socket(skt, &skt->socket); | |
365 | ||
366 | msleep(unreset_delay * 10); | |
367 | for (i = 0; i < unreset_limit; i++) { | |
368 | skt->ops->get_status(skt, &status); | |
369 | ||
370 | if (!(status & SS_DETECT)) | |
371 | return CS_NO_CARD; | |
372 | ||
373 | if (status & SS_READY) | |
374 | return CS_SUCCESS; | |
375 | ||
376 | msleep(unreset_check * 10); | |
377 | } | |
378 | ||
379 | cs_err(skt, "time out after reset.\n"); | |
380 | return CS_GENERAL_FAILURE; | |
381 | } | |
382 | ||
6e493882 DR |
383 | /** |
384 | * socket_setup() and socket_shutdown() are called by the main event handler | |
385 | * when card insertion and removal events are received. | |
386 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
387 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
388 | */ | |
389 | static void socket_shutdown(struct pcmcia_socket *s) | |
390 | { | |
391 | int status; | |
392 | ||
393 | cs_dbg(s, 4, "shutdown\n"); | |
394 | ||
395 | socket_remove_drivers(s); | |
396 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; | |
397 | msleep(shutdown_delay * 10); | |
398 | s->state &= SOCKET_INUSE; | |
399 | ||
400 | /* Blank out the socket state */ | |
401 | s->socket = dead_socket; | |
402 | s->ops->init(s); | |
403 | s->ops->set_socket(s, &s->socket); | |
404 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
405 | s->lock_count = 0; | |
406 | destroy_cis_cache(s); | |
407 | #ifdef CONFIG_CARDBUS | |
408 | cb_free(s); | |
409 | #endif | |
410 | s->functions = 0; | |
6e493882 DR |
411 | |
412 | s->ops->get_status(s, &status); | |
413 | if (status & SS_POWERON) { | |
414 | printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s); | |
415 | } | |
416 | ||
417 | cs_socket_put(s); | |
418 | } | |
419 | ||
1da177e4 LT |
420 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
421 | { | |
422 | int status, i; | |
423 | ||
424 | cs_dbg(skt, 4, "setup\n"); | |
425 | ||
426 | skt->ops->get_status(skt, &status); | |
427 | if (!(status & SS_DETECT)) | |
428 | return CS_NO_CARD; | |
429 | ||
430 | msleep(initial_delay * 10); | |
431 | ||
432 | for (i = 0; i < 100; i++) { | |
433 | skt->ops->get_status(skt, &status); | |
434 | if (!(status & SS_DETECT)) | |
435 | return CS_NO_CARD; | |
436 | ||
437 | if (!(status & SS_PENDING)) | |
438 | break; | |
439 | ||
440 | msleep(100); | |
441 | } | |
442 | ||
443 | if (status & SS_PENDING) { | |
444 | cs_err(skt, "voltage interrogation timed out.\n"); | |
445 | return CS_GENERAL_FAILURE; | |
446 | } | |
447 | ||
448 | if (status & SS_CARDBUS) { | |
5bc6b68a RK |
449 | if (!(skt->features & SS_CAP_CARDBUS)) { |
450 | cs_err(skt, "cardbus cards are not supported.\n"); | |
451 | return CS_BAD_TYPE; | |
452 | } | |
1da177e4 | 453 | skt->state |= SOCKET_CARDBUS; |
1da177e4 LT |
454 | } |
455 | ||
456 | /* | |
457 | * Decode the card voltage requirements, and apply power to the card. | |
458 | */ | |
459 | if (status & SS_3VCARD) | |
460 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
461 | else if (!(status & SS_XVCARD)) | |
462 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
463 | else { | |
464 | cs_err(skt, "unsupported voltage key.\n"); | |
465 | return CS_BAD_TYPE; | |
466 | } | |
fa912bcb DR |
467 | |
468 | if (skt->power_hook) | |
469 | skt->power_hook(skt, HOOK_POWER_PRE); | |
470 | ||
1da177e4 LT |
471 | skt->socket.flags = 0; |
472 | skt->ops->set_socket(skt, &skt->socket); | |
473 | ||
474 | /* | |
475 | * Wait "vcc_settle" for the supply to stabilise. | |
476 | */ | |
477 | msleep(vcc_settle * 10); | |
478 | ||
479 | skt->ops->get_status(skt, &status); | |
480 | if (!(status & SS_POWERON)) { | |
481 | cs_err(skt, "unable to apply power.\n"); | |
482 | return CS_BAD_TYPE; | |
483 | } | |
484 | ||
fa912bcb DR |
485 | status = socket_reset(skt); |
486 | ||
487 | if (skt->power_hook) | |
488 | skt->power_hook(skt, HOOK_POWER_POST); | |
489 | ||
490 | return status; | |
1da177e4 LT |
491 | } |
492 | ||
493 | /* | |
494 | * Handle card insertion. Setup the socket, reset the card, | |
495 | * and then tell the rest of PCMCIA that a card is present. | |
496 | */ | |
497 | static int socket_insert(struct pcmcia_socket *skt) | |
498 | { | |
499 | int ret; | |
500 | ||
501 | cs_dbg(skt, 4, "insert\n"); | |
502 | ||
503 | if (!cs_socket_get(skt)) | |
504 | return CS_NO_CARD; | |
505 | ||
506 | ret = socket_setup(skt, setup_delay); | |
507 | if (ret == CS_SUCCESS) { | |
508 | skt->state |= SOCKET_PRESENT; | |
807277cb DB |
509 | |
510 | printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n", | |
511 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
512 | skt->sock); | |
513 | ||
1da177e4 LT |
514 | #ifdef CONFIG_CARDBUS |
515 | if (skt->state & SOCKET_CARDBUS) { | |
516 | cb_alloc(skt); | |
517 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
518 | } | |
519 | #endif | |
520 | cs_dbg(skt, 4, "insert done\n"); | |
521 | ||
522 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
523 | } else { | |
524 | socket_shutdown(skt); | |
1da177e4 LT |
525 | } |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | static int socket_suspend(struct pcmcia_socket *skt) | |
531 | { | |
532 | if (skt->state & SOCKET_SUSPEND) | |
533 | return CS_IN_USE; | |
534 | ||
535 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
536 | skt->socket = dead_socket; | |
537 | skt->ops->set_socket(skt, &skt->socket); | |
538 | if (skt->ops->suspend) | |
539 | skt->ops->suspend(skt); | |
540 | skt->state |= SOCKET_SUSPEND; | |
541 | ||
542 | return CS_SUCCESS; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Resume a socket. If a card is present, verify its CIS against | |
547 | * our cached copy. If they are different, the card has been | |
548 | * replaced, and we need to tell the drivers. | |
549 | */ | |
550 | static int socket_resume(struct pcmcia_socket *skt) | |
551 | { | |
552 | int ret; | |
553 | ||
554 | if (!(skt->state & SOCKET_SUSPEND)) | |
555 | return CS_IN_USE; | |
556 | ||
557 | skt->socket = dead_socket; | |
558 | skt->ops->init(skt); | |
559 | skt->ops->set_socket(skt, &skt->socket); | |
560 | ||
561 | if (!(skt->state & SOCKET_PRESENT)) { | |
562 | skt->state &= ~SOCKET_SUSPEND; | |
563 | return socket_insert(skt); | |
564 | } | |
565 | ||
566 | ret = socket_setup(skt, resume_delay); | |
567 | if (ret == CS_SUCCESS) { | |
568 | /* | |
569 | * FIXME: need a better check here for cardbus cards. | |
570 | */ | |
571 | if (verify_cis_cache(skt) != 0) { | |
572 | cs_dbg(skt, 4, "cis mismatch - different card\n"); | |
573 | socket_remove_drivers(skt); | |
574 | destroy_cis_cache(skt); | |
575 | /* | |
576 | * Workaround: give DS time to schedule removal. | |
577 | * Remove me once the 100ms delay is eliminated | |
578 | * in ds.c | |
579 | */ | |
580 | msleep(200); | |
581 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
582 | } else { | |
583 | cs_dbg(skt, 4, "cis matches cache\n"); | |
584 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); | |
585 | } | |
586 | } else { | |
587 | socket_shutdown(skt); | |
1da177e4 LT |
588 | } |
589 | ||
590 | skt->state &= ~SOCKET_SUSPEND; | |
591 | ||
592 | return CS_SUCCESS; | |
593 | } | |
594 | ||
595 | static void socket_remove(struct pcmcia_socket *skt) | |
596 | { | |
807277cb | 597 | printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock); |
1da177e4 | 598 | socket_shutdown(skt); |
1da177e4 LT |
599 | } |
600 | ||
601 | /* | |
602 | * Process a socket card detect status change. | |
603 | * | |
604 | * If we don't have a card already present, delay the detect event for | |
605 | * about 20ms (to be on the safe side) before reading the socket status. | |
606 | * | |
607 | * Some i82365-based systems send multiple SS_DETECT events during card | |
608 | * insertion, and the "card present" status bit seems to bounce. This | |
609 | * will probably be true with GPIO-based card detection systems after | |
610 | * the product has aged. | |
611 | */ | |
612 | static void socket_detect_change(struct pcmcia_socket *skt) | |
613 | { | |
614 | if (!(skt->state & SOCKET_SUSPEND)) { | |
615 | int status; | |
616 | ||
617 | if (!(skt->state & SOCKET_PRESENT)) | |
618 | msleep(20); | |
619 | ||
620 | skt->ops->get_status(skt, &status); | |
621 | if ((skt->state & SOCKET_PRESENT) && | |
622 | !(status & SS_DETECT)) | |
623 | socket_remove(skt); | |
624 | if (!(skt->state & SOCKET_PRESENT) && | |
625 | (status & SS_DETECT)) | |
626 | socket_insert(skt); | |
627 | } | |
628 | } | |
629 | ||
630 | static int pccardd(void *__skt) | |
631 | { | |
632 | struct pcmcia_socket *skt = __skt; | |
633 | DECLARE_WAITQUEUE(wait, current); | |
634 | int ret; | |
635 | ||
1da177e4 LT |
636 | skt->thread = current; |
637 | skt->socket = dead_socket; | |
638 | skt->ops->init(skt); | |
639 | skt->ops->set_socket(skt, &skt->socket); | |
640 | ||
641 | /* register with the device core */ | |
642 | ret = class_device_register(&skt->dev); | |
643 | if (ret) { | |
644 | printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n", | |
645 | skt); | |
646 | skt->thread = NULL; | |
1da9ab73 SH |
647 | complete(&skt->thread_done); |
648 | return 0; | |
1da177e4 | 649 | } |
1da177e4 LT |
650 | |
651 | add_wait_queue(&skt->thread_wait, &wait); | |
bf4de6f2 DR |
652 | complete(&skt->thread_done); |
653 | ||
1da177e4 LT |
654 | for (;;) { |
655 | unsigned long flags; | |
656 | unsigned int events; | |
657 | ||
658 | set_current_state(TASK_INTERRUPTIBLE); | |
659 | ||
660 | spin_lock_irqsave(&skt->thread_lock, flags); | |
661 | events = skt->thread_events; | |
662 | skt->thread_events = 0; | |
663 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
664 | ||
665 | if (events) { | |
7fe908dd | 666 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
667 | if (events & SS_DETECT) |
668 | socket_detect_change(skt); | |
669 | if (events & SS_BATDEAD) | |
670 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
671 | if (events & SS_BATWARN) | |
672 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
673 | if (events & SS_READY) | |
674 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 675 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
676 | continue; |
677 | } | |
678 | ||
1da9ab73 | 679 | if (kthread_should_stop()) |
1da177e4 | 680 | break; |
bf4de6f2 DR |
681 | |
682 | schedule(); | |
683 | try_to_freeze(); | |
1da177e4 | 684 | } |
220ec029 SR |
685 | /* make sure we are running before we exit */ |
686 | set_current_state(TASK_RUNNING); | |
687 | ||
1da177e4 LT |
688 | remove_wait_queue(&skt->thread_wait, &wait); |
689 | ||
690 | /* remove from the device core */ | |
691 | class_device_unregister(&skt->dev); | |
692 | ||
1da9ab73 | 693 | return 0; |
1da177e4 LT |
694 | } |
695 | ||
696 | /* | |
697 | * Yenta (at least) probes interrupts before registering the socket and | |
698 | * starting the handler thread. | |
699 | */ | |
700 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
701 | { | |
702 | cs_dbg(s, 4, "parse_events: events %08x\n", events); | |
703 | if (s->thread) { | |
704 | spin_lock(&s->thread_lock); | |
705 | s->thread_events |= events; | |
706 | spin_unlock(&s->thread_lock); | |
707 | ||
708 | wake_up(&s->thread_wait); | |
709 | } | |
710 | } /* pcmcia_parse_events */ | |
33519ddd | 711 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 712 | |
1da177e4 LT |
713 | |
714 | /* register pcmcia_callback */ | |
715 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
716 | { | |
717 | int ret = 0; | |
718 | ||
7fe908dd DB |
719 | /* s->skt_mutex also protects s->callback */ |
720 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
721 | |
722 | if (c) { | |
723 | /* registration */ | |
724 | if (s->callback) { | |
725 | ret = -EBUSY; | |
726 | goto err; | |
727 | } | |
728 | ||
729 | s->callback = c; | |
730 | ||
731 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
732 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
733 | } else | |
734 | s->callback = NULL; | |
735 | err: | |
7fe908dd | 736 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
737 | |
738 | return ret; | |
739 | } | |
740 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
741 | ||
1da177e4 | 742 | |
33519ddd DB |
743 | /* I'm not sure which "reset" function this is supposed to use, |
744 | * but for now, it uses the low-level interface's reset, not the | |
745 | * CIS register. | |
746 | */ | |
1da177e4 LT |
747 | |
748 | int pccard_reset_card(struct pcmcia_socket *skt) | |
749 | { | |
750 | int ret; | |
33519ddd | 751 | |
1da177e4 LT |
752 | cs_dbg(skt, 1, "resetting socket\n"); |
753 | ||
7fe908dd | 754 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
755 | do { |
756 | if (!(skt->state & SOCKET_PRESENT)) { | |
757 | ret = CS_NO_CARD; | |
758 | break; | |
759 | } | |
760 | if (skt->state & SOCKET_SUSPEND) { | |
761 | ret = CS_IN_USE; | |
762 | break; | |
763 | } | |
764 | if (skt->state & SOCKET_CARDBUS) { | |
765 | ret = CS_UNSUPPORTED_FUNCTION; | |
766 | break; | |
767 | } | |
768 | ||
769 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
770 | if (ret == 0) { | |
771 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
772 | if (skt->callback) |
773 | skt->callback->suspend(skt); | |
774 | if (socket_reset(skt) == CS_SUCCESS) { | |
1da177e4 | 775 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
776 | if (skt->callback) |
777 | skt->callback->resume(skt); | |
778 | } | |
1da177e4 LT |
779 | } |
780 | ||
781 | ret = CS_SUCCESS; | |
782 | } while (0); | |
7fe908dd | 783 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
784 | |
785 | return ret; | |
786 | } /* reset_card */ | |
787 | EXPORT_SYMBOL(pccard_reset_card); | |
788 | ||
1da177e4 | 789 | |
33519ddd DB |
790 | /* These shut down or wake up a socket. They are sort of user |
791 | * initiated versions of the APM suspend and resume actions. | |
792 | */ | |
1da177e4 LT |
793 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
794 | { | |
795 | int ret; | |
33519ddd | 796 | |
1da177e4 LT |
797 | cs_dbg(skt, 1, "suspending socket\n"); |
798 | ||
7fe908dd | 799 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
800 | do { |
801 | if (!(skt->state & SOCKET_PRESENT)) { | |
802 | ret = CS_NO_CARD; | |
803 | break; | |
804 | } | |
805 | if (skt->state & SOCKET_CARDBUS) { | |
806 | ret = CS_UNSUPPORTED_FUNCTION; | |
807 | break; | |
808 | } | |
8e9e793d DB |
809 | if (skt->callback) { |
810 | ret = skt->callback->suspend(skt); | |
811 | if (ret) | |
812 | break; | |
813 | } | |
1da177e4 LT |
814 | ret = socket_suspend(skt); |
815 | } while (0); | |
7fe908dd | 816 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
817 | |
818 | return ret; | |
819 | } /* suspend_card */ | |
33519ddd DB |
820 | EXPORT_SYMBOL(pcmcia_suspend_card); |
821 | ||
1da177e4 LT |
822 | |
823 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
824 | { | |
825 | int ret; | |
826 | ||
827 | cs_dbg(skt, 1, "waking up socket\n"); | |
828 | ||
7fe908dd | 829 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
830 | do { |
831 | if (!(skt->state & SOCKET_PRESENT)) { | |
832 | ret = CS_NO_CARD; | |
833 | break; | |
834 | } | |
835 | if (skt->state & SOCKET_CARDBUS) { | |
836 | ret = CS_UNSUPPORTED_FUNCTION; | |
837 | break; | |
838 | } | |
839 | ret = socket_resume(skt); | |
8e9e793d DB |
840 | if (!ret && skt->callback) |
841 | skt->callback->resume(skt); | |
1da177e4 | 842 | } while (0); |
7fe908dd | 843 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
844 | |
845 | return ret; | |
846 | } /* resume_card */ | |
33519ddd | 847 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 848 | |
1da177e4 | 849 | |
33519ddd | 850 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
851 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
852 | { | |
853 | int ret; | |
854 | ||
855 | cs_dbg(skt, 1, "user eject request\n"); | |
856 | ||
7fe908dd | 857 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
858 | do { |
859 | if (!(skt->state & SOCKET_PRESENT)) { | |
860 | ret = -ENODEV; | |
861 | break; | |
862 | } | |
863 | ||
864 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
865 | if (ret != 0) { | |
866 | ret = -EINVAL; | |
867 | break; | |
868 | } | |
869 | ||
870 | socket_remove(skt); | |
871 | ret = 0; | |
872 | } while (0); | |
7fe908dd | 873 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
874 | |
875 | return ret; | |
876 | } /* eject_card */ | |
33519ddd DB |
877 | EXPORT_SYMBOL(pcmcia_eject_card); |
878 | ||
1da177e4 LT |
879 | |
880 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
881 | { | |
882 | int ret; | |
883 | ||
884 | cs_dbg(skt, 1, "user insert request\n"); | |
885 | ||
7fe908dd | 886 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
887 | do { |
888 | if (skt->state & SOCKET_PRESENT) { | |
889 | ret = -EBUSY; | |
890 | break; | |
891 | } | |
892 | if (socket_insert(skt) == CS_NO_CARD) { | |
893 | ret = -ENODEV; | |
894 | break; | |
895 | } | |
896 | ret = 0; | |
897 | } while (0); | |
7fe908dd | 898 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
899 | |
900 | return ret; | |
901 | } /* insert_card */ | |
33519ddd DB |
902 | EXPORT_SYMBOL(pcmcia_insert_card); |
903 | ||
1da177e4 | 904 | |
312c004d KS |
905 | static int pcmcia_socket_uevent(struct class_device *dev, char **envp, |
906 | int num_envp, char *buffer, int buffer_size) | |
3ee13937 DB |
907 | { |
908 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
909 | int i = 0, length = 0; | |
910 | ||
312c004d KS |
911 | if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, |
912 | &length, "SOCKET_NO=%u", s->sock)) | |
3ee13937 DB |
913 | return -ENOMEM; |
914 | ||
915 | envp[i] = NULL; | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
1da177e4 | 920 | |
378a33a6 DB |
921 | static struct completion pcmcia_unload; |
922 | ||
923 | static void pcmcia_release_socket_class(struct class *data) | |
924 | { | |
925 | complete(&pcmcia_unload); | |
926 | } | |
927 | ||
928 | ||
1da177e4 LT |
929 | struct class pcmcia_socket_class = { |
930 | .name = "pcmcia_socket", | |
312c004d | 931 | .uevent = pcmcia_socket_uevent, |
1da177e4 | 932 | .release = pcmcia_release_socket, |
378a33a6 | 933 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
934 | }; |
935 | EXPORT_SYMBOL(pcmcia_socket_class); | |
936 | ||
937 | ||
938 | static int __init init_pcmcia_cs(void) | |
939 | { | |
378a33a6 DB |
940 | int ret; |
941 | ||
942 | init_completion(&pcmcia_unload); | |
943 | ret = class_register(&pcmcia_socket_class); | |
1da177e4 LT |
944 | if (ret) |
945 | return (ret); | |
946 | return class_interface_register(&pccard_sysfs_interface); | |
947 | } | |
948 | ||
949 | static void __exit exit_pcmcia_cs(void) | |
950 | { | |
33519ddd DB |
951 | class_interface_unregister(&pccard_sysfs_interface); |
952 | class_unregister(&pcmcia_socket_class); | |
378a33a6 DB |
953 | |
954 | wait_for_completion(&pcmcia_unload); | |
1da177e4 LT |
955 | } |
956 | ||
957 | subsys_initcall(init_pcmcia_cs); | |
958 | module_exit(exit_pcmcia_cs); | |
959 |