Commit | Line | Data |
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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> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.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 | 91 | |
78187865 | 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) { | |
87373318 | 112 | if (socket->dev.parent != dev) |
1da177e4 | 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) { | |
87373318 | 130 | if (socket->dev.parent != dev) |
1da177e4 | 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 | { | |
87373318 GKH |
145 | struct device *dev = get_device(&skt->dev); |
146 | if (!dev) | |
1da177e4 | 147 | return NULL; |
87373318 | 148 | skt = dev_get_drvdata(dev); |
1da177e4 | 149 | if (!try_module_get(skt->owner)) { |
87373318 | 150 | put_device(&skt->dev); |
1da177e4 LT |
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); | |
87373318 | 161 | put_device(&skt->dev); |
1da177e4 LT |
162 | } |
163 | EXPORT_SYMBOL(pcmcia_put_socket); | |
164 | ||
165 | ||
87373318 | 166 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 167 | { |
87373318 | 168 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
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 | |
78187865 | 177 | * @socket: the &socket to register |
1da177e4 LT |
178 | */ |
179 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
180 | { | |
1da9ab73 | 181 | struct task_struct *tsk; |
1da177e4 LT |
182 | int ret; |
183 | ||
87373318 | 184 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
185 | return -EINVAL; |
186 | ||
187 | cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops); | |
188 | ||
189 | spin_lock_init(&socket->lock); | |
190 | ||
191 | if (socket->resource_ops->init) { | |
192 | ret = socket->resource_ops->init(socket); | |
193 | if (ret) | |
194 | return (ret); | |
195 | } | |
196 | ||
197 | /* try to obtain a socket number [yes, it gets ugly if we | |
33519ddd DB |
198 | * register more than 2^sizeof(unsigned int) pcmcia |
199 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
200 | * anyways, so I don't care] */ |
201 | down_write(&pcmcia_socket_list_rwsem); | |
202 | if (list_empty(&pcmcia_socket_list)) | |
203 | socket->sock = 0; | |
204 | else { | |
205 | unsigned int found, i = 1; | |
206 | struct pcmcia_socket *tmp; | |
207 | do { | |
208 | found = 1; | |
209 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
210 | if (tmp->sock == i) | |
211 | found = 0; | |
212 | } | |
213 | i++; | |
214 | } while (!found); | |
215 | socket->sock = i - 1; | |
216 | } | |
217 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
218 | up_write(&pcmcia_socket_list_rwsem); | |
219 | ||
5bc6b68a RK |
220 | #ifndef CONFIG_CARDBUS |
221 | /* | |
222 | * If we do not support Cardbus, ensure that | |
223 | * the Cardbus socket capability is disabled. | |
224 | */ | |
225 | socket->features &= ~SS_CAP_CARDBUS; | |
226 | #endif | |
1da177e4 LT |
227 | |
228 | /* set proper values in socket->dev */ | |
87373318 | 229 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 230 | socket->dev.class = &pcmcia_socket_class; |
87373318 | 231 | snprintf(socket->dev.bus_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
232 | |
233 | /* base address = 0, map = 0 */ | |
234 | socket->cis_mem.flags = 0; | |
235 | socket->cis_mem.speed = cis_speed; | |
236 | ||
237 | INIT_LIST_HEAD(&socket->cis_cache); | |
238 | ||
239 | init_completion(&socket->socket_released); | |
240 | init_completion(&socket->thread_done); | |
241 | init_waitqueue_head(&socket->thread_wait); | |
7fe908dd | 242 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
243 | spin_lock_init(&socket->thread_lock); |
244 | ||
1da9ab73 SH |
245 | tsk = kthread_run(pccardd, socket, "pccardd"); |
246 | if (IS_ERR(tsk)) { | |
247 | ret = PTR_ERR(tsk); | |
1da177e4 | 248 | goto err; |
1da9ab73 | 249 | } |
1da177e4 LT |
250 | |
251 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 252 | if (!socket->thread) { |
1da177e4 LT |
253 | printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket); |
254 | return -EIO; | |
255 | } | |
1da9ab73 | 256 | |
1da177e4 LT |
257 | pcmcia_parse_events(socket, SS_DETECT); |
258 | ||
259 | return 0; | |
260 | ||
261 | err: | |
262 | down_write(&pcmcia_socket_list_rwsem); | |
263 | list_del(&socket->socket_list); | |
264 | up_write(&pcmcia_socket_list_rwsem); | |
265 | return ret; | |
266 | } /* pcmcia_register_socket */ | |
267 | EXPORT_SYMBOL(pcmcia_register_socket); | |
268 | ||
269 | ||
270 | /** | |
271 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 272 | * @socket: the &socket to unregister |
1da177e4 LT |
273 | */ |
274 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
275 | { | |
276 | if (!socket) | |
277 | return; | |
278 | ||
279 | cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops); | |
280 | ||
281 | if (socket->thread) { | |
1da177e4 | 282 | wake_up(&socket->thread_wait); |
1da9ab73 | 283 | kthread_stop(socket->thread); |
1da177e4 LT |
284 | } |
285 | release_cis_mem(socket); | |
286 | ||
287 | /* remove from our own list */ | |
288 | down_write(&pcmcia_socket_list_rwsem); | |
289 | list_del(&socket->socket_list); | |
290 | up_write(&pcmcia_socket_list_rwsem); | |
291 | ||
292 | /* wait for sysfs to drop all references */ | |
293 | release_resource_db(socket); | |
294 | wait_for_completion(&socket->socket_released); | |
295 | } /* pcmcia_unregister_socket */ | |
296 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
297 | ||
298 | ||
299 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
300 | { | |
301 | struct pcmcia_socket *s; | |
302 | ||
303 | down_read(&pcmcia_socket_list_rwsem); | |
304 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
305 | if (s->sock == nr) { | |
306 | up_read(&pcmcia_socket_list_rwsem); | |
307 | return s; | |
308 | } | |
309 | up_read(&pcmcia_socket_list_rwsem); | |
310 | ||
311 | return NULL; | |
312 | ||
313 | } | |
314 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
315 | ||
78187865 | 316 | /* |
33519ddd DB |
317 | * The central event handler. Send_event() sends an event to the |
318 | * 16-bit subsystem, which then calls the relevant device drivers. | |
319 | * Parse_events() interprets the event bits from | |
320 | * a card status change report. Do_shutdown() handles the high | |
321 | * priority stuff associated with a card removal. | |
322 | */ | |
1da177e4 LT |
323 | |
324 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
325 | ||
326 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
327 | { | |
328 | int ret; | |
329 | ||
330 | if (s->state & SOCKET_CARDBUS) | |
331 | return 0; | |
332 | ||
333 | cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n", | |
334 | event, priority, s->callback); | |
335 | ||
336 | if (!s->callback) | |
337 | return 0; | |
338 | if (!try_module_get(s->callback->owner)) | |
339 | return 0; | |
340 | ||
341 | ret = s->callback->event(s, event, priority); | |
342 | ||
343 | module_put(s->callback->owner); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
349 | { | |
350 | cs_dbg(skt, 4, "remove_drivers\n"); | |
351 | ||
352 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
353 | } | |
354 | ||
1da177e4 LT |
355 | static int socket_reset(struct pcmcia_socket *skt) |
356 | { | |
357 | int status, i; | |
358 | ||
359 | cs_dbg(skt, 4, "reset\n"); | |
360 | ||
361 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
362 | skt->ops->set_socket(skt, &skt->socket); | |
363 | udelay((long)reset_time); | |
364 | ||
365 | skt->socket.flags &= ~SS_RESET; | |
366 | skt->ops->set_socket(skt, &skt->socket); | |
367 | ||
368 | msleep(unreset_delay * 10); | |
369 | for (i = 0; i < unreset_limit; i++) { | |
370 | skt->ops->get_status(skt, &status); | |
371 | ||
372 | if (!(status & SS_DETECT)) | |
373 | return CS_NO_CARD; | |
374 | ||
375 | if (status & SS_READY) | |
376 | return CS_SUCCESS; | |
377 | ||
378 | msleep(unreset_check * 10); | |
379 | } | |
380 | ||
381 | cs_err(skt, "time out after reset.\n"); | |
382 | return CS_GENERAL_FAILURE; | |
383 | } | |
384 | ||
78187865 | 385 | /* |
6e493882 DR |
386 | * socket_setup() and socket_shutdown() are called by the main event handler |
387 | * when card insertion and removal events are received. | |
388 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
389 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
390 | */ | |
391 | static void socket_shutdown(struct pcmcia_socket *s) | |
392 | { | |
393 | int status; | |
394 | ||
395 | cs_dbg(s, 4, "shutdown\n"); | |
396 | ||
397 | socket_remove_drivers(s); | |
398 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; | |
399 | msleep(shutdown_delay * 10); | |
400 | s->state &= SOCKET_INUSE; | |
401 | ||
402 | /* Blank out the socket state */ | |
403 | s->socket = dead_socket; | |
404 | s->ops->init(s); | |
405 | s->ops->set_socket(s, &s->socket); | |
406 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
407 | s->lock_count = 0; | |
408 | destroy_cis_cache(s); | |
409 | #ifdef CONFIG_CARDBUS | |
410 | cb_free(s); | |
411 | #endif | |
412 | s->functions = 0; | |
6e493882 | 413 | |
afb2c165 DR |
414 | /* give socket some time to power down */ |
415 | msleep(100); | |
416 | ||
6e493882 DR |
417 | s->ops->get_status(s, &status); |
418 | if (status & SS_POWERON) { | |
419 | printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s); | |
420 | } | |
421 | ||
422 | cs_socket_put(s); | |
423 | } | |
424 | ||
1da177e4 LT |
425 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
426 | { | |
427 | int status, i; | |
428 | ||
429 | cs_dbg(skt, 4, "setup\n"); | |
430 | ||
431 | skt->ops->get_status(skt, &status); | |
432 | if (!(status & SS_DETECT)) | |
433 | return CS_NO_CARD; | |
434 | ||
435 | msleep(initial_delay * 10); | |
436 | ||
437 | for (i = 0; i < 100; i++) { | |
438 | skt->ops->get_status(skt, &status); | |
439 | if (!(status & SS_DETECT)) | |
440 | return CS_NO_CARD; | |
441 | ||
442 | if (!(status & SS_PENDING)) | |
443 | break; | |
444 | ||
445 | msleep(100); | |
446 | } | |
447 | ||
448 | if (status & SS_PENDING) { | |
449 | cs_err(skt, "voltage interrogation timed out.\n"); | |
450 | return CS_GENERAL_FAILURE; | |
451 | } | |
452 | ||
453 | if (status & SS_CARDBUS) { | |
5bc6b68a RK |
454 | if (!(skt->features & SS_CAP_CARDBUS)) { |
455 | cs_err(skt, "cardbus cards are not supported.\n"); | |
456 | return CS_BAD_TYPE; | |
457 | } | |
1da177e4 | 458 | skt->state |= SOCKET_CARDBUS; |
1da177e4 LT |
459 | } |
460 | ||
461 | /* | |
462 | * Decode the card voltage requirements, and apply power to the card. | |
463 | */ | |
464 | if (status & SS_3VCARD) | |
465 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
466 | else if (!(status & SS_XVCARD)) | |
467 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
468 | else { | |
469 | cs_err(skt, "unsupported voltage key.\n"); | |
470 | return CS_BAD_TYPE; | |
471 | } | |
fa912bcb DR |
472 | |
473 | if (skt->power_hook) | |
474 | skt->power_hook(skt, HOOK_POWER_PRE); | |
475 | ||
1da177e4 LT |
476 | skt->socket.flags = 0; |
477 | skt->ops->set_socket(skt, &skt->socket); | |
478 | ||
479 | /* | |
480 | * Wait "vcc_settle" for the supply to stabilise. | |
481 | */ | |
482 | msleep(vcc_settle * 10); | |
483 | ||
484 | skt->ops->get_status(skt, &status); | |
485 | if (!(status & SS_POWERON)) { | |
486 | cs_err(skt, "unable to apply power.\n"); | |
487 | return CS_BAD_TYPE; | |
488 | } | |
489 | ||
fa912bcb DR |
490 | status = socket_reset(skt); |
491 | ||
492 | if (skt->power_hook) | |
493 | skt->power_hook(skt, HOOK_POWER_POST); | |
494 | ||
495 | return status; | |
1da177e4 LT |
496 | } |
497 | ||
498 | /* | |
499 | * Handle card insertion. Setup the socket, reset the card, | |
500 | * and then tell the rest of PCMCIA that a card is present. | |
501 | */ | |
502 | static int socket_insert(struct pcmcia_socket *skt) | |
503 | { | |
504 | int ret; | |
505 | ||
506 | cs_dbg(skt, 4, "insert\n"); | |
507 | ||
508 | if (!cs_socket_get(skt)) | |
509 | return CS_NO_CARD; | |
510 | ||
511 | ret = socket_setup(skt, setup_delay); | |
512 | if (ret == CS_SUCCESS) { | |
513 | skt->state |= SOCKET_PRESENT; | |
807277cb DB |
514 | |
515 | printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n", | |
516 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
517 | skt->sock); | |
518 | ||
1da177e4 LT |
519 | #ifdef CONFIG_CARDBUS |
520 | if (skt->state & SOCKET_CARDBUS) { | |
521 | cb_alloc(skt); | |
522 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
523 | } | |
524 | #endif | |
525 | cs_dbg(skt, 4, "insert done\n"); | |
526 | ||
527 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
528 | } else { | |
529 | socket_shutdown(skt); | |
1da177e4 LT |
530 | } |
531 | ||
532 | return ret; | |
533 | } | |
534 | ||
535 | static int socket_suspend(struct pcmcia_socket *skt) | |
536 | { | |
537 | if (skt->state & SOCKET_SUSPEND) | |
538 | return CS_IN_USE; | |
539 | ||
540 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
541 | skt->socket = dead_socket; | |
542 | skt->ops->set_socket(skt, &skt->socket); | |
543 | if (skt->ops->suspend) | |
544 | skt->ops->suspend(skt); | |
545 | skt->state |= SOCKET_SUSPEND; | |
546 | ||
547 | return CS_SUCCESS; | |
548 | } | |
549 | ||
550 | /* | |
551 | * Resume a socket. If a card is present, verify its CIS against | |
552 | * our cached copy. If they are different, the card has been | |
553 | * replaced, and we need to tell the drivers. | |
554 | */ | |
555 | static int socket_resume(struct pcmcia_socket *skt) | |
556 | { | |
557 | int ret; | |
558 | ||
559 | if (!(skt->state & SOCKET_SUSPEND)) | |
560 | return CS_IN_USE; | |
561 | ||
562 | skt->socket = dead_socket; | |
563 | skt->ops->init(skt); | |
564 | skt->ops->set_socket(skt, &skt->socket); | |
565 | ||
566 | if (!(skt->state & SOCKET_PRESENT)) { | |
567 | skt->state &= ~SOCKET_SUSPEND; | |
568 | return socket_insert(skt); | |
569 | } | |
570 | ||
571 | ret = socket_setup(skt, resume_delay); | |
572 | if (ret == CS_SUCCESS) { | |
573 | /* | |
574 | * FIXME: need a better check here for cardbus cards. | |
575 | */ | |
576 | if (verify_cis_cache(skt) != 0) { | |
577 | cs_dbg(skt, 4, "cis mismatch - different card\n"); | |
578 | socket_remove_drivers(skt); | |
579 | destroy_cis_cache(skt); | |
580 | /* | |
581 | * Workaround: give DS time to schedule removal. | |
582 | * Remove me once the 100ms delay is eliminated | |
583 | * in ds.c | |
584 | */ | |
585 | msleep(200); | |
586 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
587 | } else { | |
588 | cs_dbg(skt, 4, "cis matches cache\n"); | |
589 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); | |
590 | } | |
591 | } else { | |
592 | socket_shutdown(skt); | |
1da177e4 LT |
593 | } |
594 | ||
595 | skt->state &= ~SOCKET_SUSPEND; | |
596 | ||
597 | return CS_SUCCESS; | |
598 | } | |
599 | ||
600 | static void socket_remove(struct pcmcia_socket *skt) | |
601 | { | |
807277cb | 602 | printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock); |
1da177e4 | 603 | socket_shutdown(skt); |
1da177e4 LT |
604 | } |
605 | ||
606 | /* | |
607 | * Process a socket card detect status change. | |
608 | * | |
609 | * If we don't have a card already present, delay the detect event for | |
610 | * about 20ms (to be on the safe side) before reading the socket status. | |
611 | * | |
612 | * Some i82365-based systems send multiple SS_DETECT events during card | |
613 | * insertion, and the "card present" status bit seems to bounce. This | |
614 | * will probably be true with GPIO-based card detection systems after | |
615 | * the product has aged. | |
616 | */ | |
617 | static void socket_detect_change(struct pcmcia_socket *skt) | |
618 | { | |
619 | if (!(skt->state & SOCKET_SUSPEND)) { | |
620 | int status; | |
621 | ||
622 | if (!(skt->state & SOCKET_PRESENT)) | |
623 | msleep(20); | |
624 | ||
625 | skt->ops->get_status(skt, &status); | |
626 | if ((skt->state & SOCKET_PRESENT) && | |
627 | !(status & SS_DETECT)) | |
628 | socket_remove(skt); | |
629 | if (!(skt->state & SOCKET_PRESENT) && | |
630 | (status & SS_DETECT)) | |
631 | socket_insert(skt); | |
632 | } | |
633 | } | |
634 | ||
635 | static int pccardd(void *__skt) | |
636 | { | |
637 | struct pcmcia_socket *skt = __skt; | |
638 | DECLARE_WAITQUEUE(wait, current); | |
639 | int ret; | |
640 | ||
1da177e4 LT |
641 | skt->thread = current; |
642 | skt->socket = dead_socket; | |
643 | skt->ops->init(skt); | |
644 | skt->ops->set_socket(skt, &skt->socket); | |
645 | ||
646 | /* register with the device core */ | |
87373318 | 647 | ret = device_register(&skt->dev); |
1da177e4 LT |
648 | if (ret) { |
649 | printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n", | |
650 | skt); | |
651 | skt->thread = NULL; | |
1da9ab73 SH |
652 | complete(&skt->thread_done); |
653 | return 0; | |
1da177e4 | 654 | } |
4356d73d DB |
655 | ret = pccard_sysfs_add_socket(&skt->dev); |
656 | if (ret) | |
657 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 LT |
658 | |
659 | add_wait_queue(&skt->thread_wait, &wait); | |
bf4de6f2 DR |
660 | complete(&skt->thread_done); |
661 | ||
83144186 | 662 | set_freezable(); |
1da177e4 LT |
663 | for (;;) { |
664 | unsigned long flags; | |
665 | unsigned int events; | |
666 | ||
667 | set_current_state(TASK_INTERRUPTIBLE); | |
668 | ||
669 | spin_lock_irqsave(&skt->thread_lock, flags); | |
670 | events = skt->thread_events; | |
671 | skt->thread_events = 0; | |
672 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
673 | ||
674 | if (events) { | |
7fe908dd | 675 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
676 | if (events & SS_DETECT) |
677 | socket_detect_change(skt); | |
678 | if (events & SS_BATDEAD) | |
679 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
680 | if (events & SS_BATWARN) | |
681 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
682 | if (events & SS_READY) | |
683 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 684 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
685 | continue; |
686 | } | |
687 | ||
1da9ab73 | 688 | if (kthread_should_stop()) |
1da177e4 | 689 | break; |
bf4de6f2 DR |
690 | |
691 | schedule(); | |
692 | try_to_freeze(); | |
1da177e4 | 693 | } |
220ec029 SR |
694 | /* make sure we are running before we exit */ |
695 | set_current_state(TASK_RUNNING); | |
696 | ||
1da177e4 LT |
697 | remove_wait_queue(&skt->thread_wait, &wait); |
698 | ||
699 | /* remove from the device core */ | |
4356d73d | 700 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 701 | device_unregister(&skt->dev); |
1da177e4 | 702 | |
1da9ab73 | 703 | return 0; |
1da177e4 LT |
704 | } |
705 | ||
706 | /* | |
707 | * Yenta (at least) probes interrupts before registering the socket and | |
708 | * starting the handler thread. | |
709 | */ | |
710 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
711 | { | |
4b7a89a3 | 712 | unsigned long flags; |
1da177e4 LT |
713 | cs_dbg(s, 4, "parse_events: events %08x\n", events); |
714 | if (s->thread) { | |
4b7a89a3 | 715 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 716 | s->thread_events |= events; |
4b7a89a3 | 717 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 LT |
718 | |
719 | wake_up(&s->thread_wait); | |
720 | } | |
721 | } /* pcmcia_parse_events */ | |
33519ddd | 722 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 723 | |
1da177e4 LT |
724 | |
725 | /* register pcmcia_callback */ | |
726 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
727 | { | |
728 | int ret = 0; | |
729 | ||
7fe908dd DB |
730 | /* s->skt_mutex also protects s->callback */ |
731 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
732 | |
733 | if (c) { | |
734 | /* registration */ | |
735 | if (s->callback) { | |
736 | ret = -EBUSY; | |
737 | goto err; | |
738 | } | |
739 | ||
740 | s->callback = c; | |
741 | ||
742 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
743 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
744 | } else | |
745 | s->callback = NULL; | |
746 | err: | |
7fe908dd | 747 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
748 | |
749 | return ret; | |
750 | } | |
751 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
752 | ||
1da177e4 | 753 | |
33519ddd DB |
754 | /* I'm not sure which "reset" function this is supposed to use, |
755 | * but for now, it uses the low-level interface's reset, not the | |
756 | * CIS register. | |
757 | */ | |
1da177e4 LT |
758 | |
759 | int pccard_reset_card(struct pcmcia_socket *skt) | |
760 | { | |
761 | int ret; | |
33519ddd | 762 | |
1da177e4 LT |
763 | cs_dbg(skt, 1, "resetting socket\n"); |
764 | ||
7fe908dd | 765 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
766 | do { |
767 | if (!(skt->state & SOCKET_PRESENT)) { | |
768 | ret = CS_NO_CARD; | |
769 | break; | |
770 | } | |
771 | if (skt->state & SOCKET_SUSPEND) { | |
772 | ret = CS_IN_USE; | |
773 | break; | |
774 | } | |
775 | if (skt->state & SOCKET_CARDBUS) { | |
776 | ret = CS_UNSUPPORTED_FUNCTION; | |
777 | break; | |
778 | } | |
779 | ||
780 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
781 | if (ret == 0) { | |
782 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
783 | if (skt->callback) |
784 | skt->callback->suspend(skt); | |
785 | if (socket_reset(skt) == CS_SUCCESS) { | |
1da177e4 | 786 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
787 | if (skt->callback) |
788 | skt->callback->resume(skt); | |
789 | } | |
1da177e4 LT |
790 | } |
791 | ||
792 | ret = CS_SUCCESS; | |
793 | } while (0); | |
7fe908dd | 794 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
795 | |
796 | return ret; | |
797 | } /* reset_card */ | |
798 | EXPORT_SYMBOL(pccard_reset_card); | |
799 | ||
1da177e4 | 800 | |
33519ddd DB |
801 | /* These shut down or wake up a socket. They are sort of user |
802 | * initiated versions of the APM suspend and resume actions. | |
803 | */ | |
1da177e4 LT |
804 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
805 | { | |
806 | int ret; | |
33519ddd | 807 | |
1da177e4 LT |
808 | cs_dbg(skt, 1, "suspending socket\n"); |
809 | ||
7fe908dd | 810 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
811 | do { |
812 | if (!(skt->state & SOCKET_PRESENT)) { | |
813 | ret = CS_NO_CARD; | |
814 | break; | |
815 | } | |
816 | if (skt->state & SOCKET_CARDBUS) { | |
817 | ret = CS_UNSUPPORTED_FUNCTION; | |
818 | break; | |
819 | } | |
8e9e793d DB |
820 | if (skt->callback) { |
821 | ret = skt->callback->suspend(skt); | |
822 | if (ret) | |
823 | break; | |
824 | } | |
1da177e4 LT |
825 | ret = socket_suspend(skt); |
826 | } while (0); | |
7fe908dd | 827 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
828 | |
829 | return ret; | |
830 | } /* suspend_card */ | |
33519ddd DB |
831 | EXPORT_SYMBOL(pcmcia_suspend_card); |
832 | ||
1da177e4 LT |
833 | |
834 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
835 | { | |
836 | int ret; | |
837 | ||
838 | cs_dbg(skt, 1, "waking up socket\n"); | |
839 | ||
7fe908dd | 840 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
841 | do { |
842 | if (!(skt->state & SOCKET_PRESENT)) { | |
843 | ret = CS_NO_CARD; | |
844 | break; | |
845 | } | |
846 | if (skt->state & SOCKET_CARDBUS) { | |
847 | ret = CS_UNSUPPORTED_FUNCTION; | |
848 | break; | |
849 | } | |
850 | ret = socket_resume(skt); | |
8e9e793d DB |
851 | if (!ret && skt->callback) |
852 | skt->callback->resume(skt); | |
1da177e4 | 853 | } while (0); |
7fe908dd | 854 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
855 | |
856 | return ret; | |
857 | } /* resume_card */ | |
33519ddd | 858 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 859 | |
1da177e4 | 860 | |
33519ddd | 861 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
862 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
863 | { | |
864 | int ret; | |
865 | ||
866 | cs_dbg(skt, 1, "user eject request\n"); | |
867 | ||
7fe908dd | 868 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
869 | do { |
870 | if (!(skt->state & SOCKET_PRESENT)) { | |
871 | ret = -ENODEV; | |
872 | break; | |
873 | } | |
874 | ||
875 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
876 | if (ret != 0) { | |
877 | ret = -EINVAL; | |
878 | break; | |
879 | } | |
880 | ||
881 | socket_remove(skt); | |
882 | ret = 0; | |
883 | } while (0); | |
7fe908dd | 884 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
885 | |
886 | return ret; | |
887 | } /* eject_card */ | |
33519ddd DB |
888 | EXPORT_SYMBOL(pcmcia_eject_card); |
889 | ||
1da177e4 LT |
890 | |
891 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
892 | { | |
893 | int ret; | |
894 | ||
895 | cs_dbg(skt, 1, "user insert request\n"); | |
896 | ||
7fe908dd | 897 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
898 | do { |
899 | if (skt->state & SOCKET_PRESENT) { | |
900 | ret = -EBUSY; | |
901 | break; | |
902 | } | |
903 | if (socket_insert(skt) == CS_NO_CARD) { | |
904 | ret = -ENODEV; | |
905 | break; | |
906 | } | |
907 | ret = 0; | |
908 | } while (0); | |
7fe908dd | 909 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
910 | |
911 | return ret; | |
912 | } /* insert_card */ | |
33519ddd DB |
913 | EXPORT_SYMBOL(pcmcia_insert_card); |
914 | ||
1da177e4 | 915 | |
7eff2e7a KS |
916 | static int pcmcia_socket_uevent(struct device *dev, |
917 | struct kobj_uevent_env *env) | |
3ee13937 DB |
918 | { |
919 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 920 | |
7eff2e7a | 921 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
922 | return -ENOMEM; |
923 | ||
3ee13937 DB |
924 | return 0; |
925 | } | |
926 | ||
1da177e4 | 927 | |
378a33a6 DB |
928 | static struct completion pcmcia_unload; |
929 | ||
930 | static void pcmcia_release_socket_class(struct class *data) | |
931 | { | |
932 | complete(&pcmcia_unload); | |
933 | } | |
934 | ||
935 | ||
1da177e4 LT |
936 | struct class pcmcia_socket_class = { |
937 | .name = "pcmcia_socket", | |
87373318 GKH |
938 | .dev_uevent = pcmcia_socket_uevent, |
939 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 940 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
941 | }; |
942 | EXPORT_SYMBOL(pcmcia_socket_class); | |
943 | ||
944 | ||
945 | static int __init init_pcmcia_cs(void) | |
946 | { | |
378a33a6 | 947 | init_completion(&pcmcia_unload); |
4356d73d | 948 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
949 | } |
950 | ||
951 | static void __exit exit_pcmcia_cs(void) | |
952 | { | |
33519ddd | 953 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 954 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
955 | } |
956 | ||
957 | subsys_initcall(init_pcmcia_cs); | |
958 | module_exit(exit_pcmcia_cs); | |
959 |