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 | ||
1da177e4 LT |
35 | #include <pcmcia/cs_types.h> |
36 | #include <pcmcia/ss.h> | |
37 | #include <pcmcia/cs.h> | |
1da177e4 LT |
38 | #include <pcmcia/cistpl.h> |
39 | #include <pcmcia/cisreg.h> | |
40 | #include <pcmcia/ds.h> | |
41 | #include "cs_internal.h" | |
42 | ||
1da177e4 LT |
43 | |
44 | /* Module parameters */ | |
45 | ||
46 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 47 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
48 | MODULE_LICENSE("GPL"); |
49 | ||
50 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
51 | ||
52 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
53 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
54 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
55 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
56 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
57 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
58 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
59 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
60 | ||
61 | /* Access speed for attribute memory windows */ | |
62 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
63 | ||
1da177e4 LT |
64 | #ifdef DEBUG |
65 | static int pc_debug; | |
66 | ||
67 | module_param(pc_debug, int, 0644); | |
68 | ||
69 | int cs_debug_level(int level) | |
70 | { | |
71 | return pc_debug > level; | |
72 | } | |
73 | #endif | |
74 | ||
1da177e4 LT |
75 | |
76 | socket_state_t dead_socket = { | |
77 | .csc_mask = SS_DETECT, | |
78 | }; | |
33519ddd | 79 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
80 | |
81 | ||
82 | /* List of all sockets, protected by a rwsem */ | |
83 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 84 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 85 | |
33519ddd DB |
86 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
87 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 88 | |
1da177e4 | 89 | |
78187865 | 90 | /* |
33519ddd DB |
91 | * Low-level PCMCIA socket drivers need to register with the PCCard |
92 | * core using pcmcia_register_socket. | |
93 | * | |
94 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
95 | * .drv struct: |
96 | * - pcmcia_socket_dev_suspend | |
97 | * - pcmcia_socket_dev_resume | |
98 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
99 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
100 | */ | |
101 | static int socket_resume(struct pcmcia_socket *skt); | |
102 | static int socket_suspend(struct pcmcia_socket *skt); | |
103 | ||
104 | int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state) | |
105 | { | |
106 | struct pcmcia_socket *socket; | |
107 | ||
108 | down_read(&pcmcia_socket_list_rwsem); | |
109 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 110 | if (socket->dev.parent != dev) |
1da177e4 | 111 | continue; |
7fe908dd | 112 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 113 | socket_suspend(socket); |
7fe908dd | 114 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
115 | } |
116 | up_read(&pcmcia_socket_list_rwsem); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
121 | ||
122 | int pcmcia_socket_dev_resume(struct device *dev) | |
123 | { | |
124 | struct pcmcia_socket *socket; | |
125 | ||
126 | down_read(&pcmcia_socket_list_rwsem); | |
127 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 128 | if (socket->dev.parent != dev) |
1da177e4 | 129 | continue; |
7fe908dd | 130 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 131 | socket_resume(socket); |
7fe908dd | 132 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
133 | } |
134 | up_read(&pcmcia_socket_list_rwsem); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
139 | ||
140 | ||
141 | struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt) | |
142 | { | |
87373318 GKH |
143 | struct device *dev = get_device(&skt->dev); |
144 | if (!dev) | |
1da177e4 | 145 | return NULL; |
87373318 | 146 | skt = dev_get_drvdata(dev); |
1da177e4 | 147 | if (!try_module_get(skt->owner)) { |
87373318 | 148 | put_device(&skt->dev); |
1da177e4 LT |
149 | return NULL; |
150 | } | |
151 | return (skt); | |
152 | } | |
153 | EXPORT_SYMBOL(pcmcia_get_socket); | |
154 | ||
155 | ||
156 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
157 | { | |
158 | module_put(skt->owner); | |
87373318 | 159 | put_device(&skt->dev); |
1da177e4 LT |
160 | } |
161 | EXPORT_SYMBOL(pcmcia_put_socket); | |
162 | ||
163 | ||
87373318 | 164 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 165 | { |
87373318 | 166 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
167 | |
168 | complete(&socket->socket_released); | |
169 | } | |
170 | ||
171 | static int pccardd(void *__skt); | |
172 | ||
173 | /** | |
174 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 175 | * @socket: the &socket to register |
1da177e4 LT |
176 | */ |
177 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
178 | { | |
1da9ab73 | 179 | struct task_struct *tsk; |
1da177e4 LT |
180 | int ret; |
181 | ||
87373318 | 182 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
183 | return -EINVAL; |
184 | ||
185 | cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops); | |
186 | ||
187 | spin_lock_init(&socket->lock); | |
188 | ||
189 | if (socket->resource_ops->init) { | |
190 | ret = socket->resource_ops->init(socket); | |
191 | if (ret) | |
192 | return (ret); | |
193 | } | |
194 | ||
195 | /* try to obtain a socket number [yes, it gets ugly if we | |
33519ddd DB |
196 | * register more than 2^sizeof(unsigned int) pcmcia |
197 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
198 | * anyways, so I don't care] */ |
199 | down_write(&pcmcia_socket_list_rwsem); | |
200 | if (list_empty(&pcmcia_socket_list)) | |
201 | socket->sock = 0; | |
202 | else { | |
203 | unsigned int found, i = 1; | |
204 | struct pcmcia_socket *tmp; | |
205 | do { | |
206 | found = 1; | |
207 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
208 | if (tmp->sock == i) | |
209 | found = 0; | |
210 | } | |
211 | i++; | |
212 | } while (!found); | |
213 | socket->sock = i - 1; | |
214 | } | |
215 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
216 | up_write(&pcmcia_socket_list_rwsem); | |
217 | ||
5bc6b68a RK |
218 | #ifndef CONFIG_CARDBUS |
219 | /* | |
220 | * If we do not support Cardbus, ensure that | |
221 | * the Cardbus socket capability is disabled. | |
222 | */ | |
223 | socket->features &= ~SS_CAP_CARDBUS; | |
224 | #endif | |
1da177e4 LT |
225 | |
226 | /* set proper values in socket->dev */ | |
87373318 | 227 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 228 | socket->dev.class = &pcmcia_socket_class; |
87373318 | 229 | snprintf(socket->dev.bus_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
230 | |
231 | /* base address = 0, map = 0 */ | |
232 | socket->cis_mem.flags = 0; | |
233 | socket->cis_mem.speed = cis_speed; | |
234 | ||
235 | INIT_LIST_HEAD(&socket->cis_cache); | |
236 | ||
237 | init_completion(&socket->socket_released); | |
238 | init_completion(&socket->thread_done); | |
7fe908dd | 239 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
240 | spin_lock_init(&socket->thread_lock); |
241 | ||
1da9ab73 SH |
242 | tsk = kthread_run(pccardd, socket, "pccardd"); |
243 | if (IS_ERR(tsk)) { | |
244 | ret = PTR_ERR(tsk); | |
1da177e4 | 245 | goto err; |
1da9ab73 | 246 | } |
1da177e4 LT |
247 | |
248 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 249 | if (!socket->thread) { |
1da177e4 LT |
250 | printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket); |
251 | return -EIO; | |
252 | } | |
1da9ab73 | 253 | |
1da177e4 LT |
254 | pcmcia_parse_events(socket, SS_DETECT); |
255 | ||
256 | return 0; | |
257 | ||
258 | err: | |
259 | down_write(&pcmcia_socket_list_rwsem); | |
260 | list_del(&socket->socket_list); | |
261 | up_write(&pcmcia_socket_list_rwsem); | |
262 | return ret; | |
263 | } /* pcmcia_register_socket */ | |
264 | EXPORT_SYMBOL(pcmcia_register_socket); | |
265 | ||
266 | ||
267 | /** | |
268 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 269 | * @socket: the &socket to unregister |
1da177e4 LT |
270 | */ |
271 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
272 | { | |
273 | if (!socket) | |
274 | return; | |
275 | ||
276 | cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops); | |
277 | ||
0b402094 | 278 | if (socket->thread) |
1da9ab73 | 279 | kthread_stop(socket->thread); |
0b402094 | 280 | |
1da177e4 LT |
281 | release_cis_mem(socket); |
282 | ||
283 | /* remove from our own list */ | |
284 | down_write(&pcmcia_socket_list_rwsem); | |
285 | list_del(&socket->socket_list); | |
286 | up_write(&pcmcia_socket_list_rwsem); | |
287 | ||
288 | /* wait for sysfs to drop all references */ | |
289 | release_resource_db(socket); | |
290 | wait_for_completion(&socket->socket_released); | |
291 | } /* pcmcia_unregister_socket */ | |
292 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
293 | ||
294 | ||
295 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
296 | { | |
297 | struct pcmcia_socket *s; | |
298 | ||
299 | down_read(&pcmcia_socket_list_rwsem); | |
300 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
301 | if (s->sock == nr) { | |
302 | up_read(&pcmcia_socket_list_rwsem); | |
303 | return s; | |
304 | } | |
305 | up_read(&pcmcia_socket_list_rwsem); | |
306 | ||
307 | return NULL; | |
308 | ||
309 | } | |
310 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
311 | ||
78187865 | 312 | /* |
33519ddd DB |
313 | * The central event handler. Send_event() sends an event to the |
314 | * 16-bit subsystem, which then calls the relevant device drivers. | |
315 | * Parse_events() interprets the event bits from | |
316 | * a card status change report. Do_shutdown() handles the high | |
317 | * priority stuff associated with a card removal. | |
318 | */ | |
1da177e4 LT |
319 | |
320 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
321 | ||
322 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | if (s->state & SOCKET_CARDBUS) | |
327 | return 0; | |
328 | ||
329 | cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n", | |
330 | event, priority, s->callback); | |
331 | ||
332 | if (!s->callback) | |
333 | return 0; | |
334 | if (!try_module_get(s->callback->owner)) | |
335 | return 0; | |
336 | ||
337 | ret = s->callback->event(s, event, priority); | |
338 | ||
339 | module_put(s->callback->owner); | |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
344 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
345 | { | |
346 | cs_dbg(skt, 4, "remove_drivers\n"); | |
347 | ||
348 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
349 | } | |
350 | ||
1da177e4 LT |
351 | static int socket_reset(struct pcmcia_socket *skt) |
352 | { | |
353 | int status, i; | |
354 | ||
355 | cs_dbg(skt, 4, "reset\n"); | |
356 | ||
357 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
358 | skt->ops->set_socket(skt, &skt->socket); | |
359 | udelay((long)reset_time); | |
360 | ||
361 | skt->socket.flags &= ~SS_RESET; | |
362 | skt->ops->set_socket(skt, &skt->socket); | |
363 | ||
364 | msleep(unreset_delay * 10); | |
365 | for (i = 0; i < unreset_limit; i++) { | |
366 | skt->ops->get_status(skt, &status); | |
367 | ||
368 | if (!(status & SS_DETECT)) | |
369 | return CS_NO_CARD; | |
370 | ||
371 | if (status & SS_READY) | |
372 | return CS_SUCCESS; | |
373 | ||
374 | msleep(unreset_check * 10); | |
375 | } | |
376 | ||
377 | cs_err(skt, "time out after reset.\n"); | |
378 | return CS_GENERAL_FAILURE; | |
379 | } | |
380 | ||
78187865 | 381 | /* |
6e493882 DR |
382 | * socket_setup() and socket_shutdown() are called by the main event handler |
383 | * when card insertion and removal events are received. | |
384 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
385 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
386 | */ | |
387 | static void socket_shutdown(struct pcmcia_socket *s) | |
388 | { | |
389 | int status; | |
390 | ||
391 | cs_dbg(s, 4, "shutdown\n"); | |
392 | ||
393 | socket_remove_drivers(s); | |
394 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; | |
395 | msleep(shutdown_delay * 10); | |
396 | s->state &= SOCKET_INUSE; | |
397 | ||
398 | /* Blank out the socket state */ | |
399 | s->socket = dead_socket; | |
400 | s->ops->init(s); | |
401 | s->ops->set_socket(s, &s->socket); | |
402 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
403 | s->lock_count = 0; | |
404 | destroy_cis_cache(s); | |
405 | #ifdef CONFIG_CARDBUS | |
406 | cb_free(s); | |
407 | #endif | |
408 | s->functions = 0; | |
6e493882 | 409 | |
afb2c165 DR |
410 | /* give socket some time to power down */ |
411 | msleep(100); | |
412 | ||
6e493882 DR |
413 | s->ops->get_status(s, &status); |
414 | if (status & SS_POWERON) { | |
415 | printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s); | |
416 | } | |
417 | ||
418 | cs_socket_put(s); | |
419 | } | |
420 | ||
1da177e4 LT |
421 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
422 | { | |
423 | int status, i; | |
424 | ||
425 | cs_dbg(skt, 4, "setup\n"); | |
426 | ||
427 | skt->ops->get_status(skt, &status); | |
428 | if (!(status & SS_DETECT)) | |
429 | return CS_NO_CARD; | |
430 | ||
431 | msleep(initial_delay * 10); | |
432 | ||
433 | for (i = 0; i < 100; i++) { | |
434 | skt->ops->get_status(skt, &status); | |
435 | if (!(status & SS_DETECT)) | |
436 | return CS_NO_CARD; | |
437 | ||
438 | if (!(status & SS_PENDING)) | |
439 | break; | |
440 | ||
441 | msleep(100); | |
442 | } | |
443 | ||
444 | if (status & SS_PENDING) { | |
445 | cs_err(skt, "voltage interrogation timed out.\n"); | |
446 | return CS_GENERAL_FAILURE; | |
447 | } | |
448 | ||
449 | if (status & SS_CARDBUS) { | |
5bc6b68a RK |
450 | if (!(skt->features & SS_CAP_CARDBUS)) { |
451 | cs_err(skt, "cardbus cards are not supported.\n"); | |
452 | return CS_BAD_TYPE; | |
453 | } | |
1da177e4 | 454 | skt->state |= SOCKET_CARDBUS; |
1da177e4 LT |
455 | } |
456 | ||
457 | /* | |
458 | * Decode the card voltage requirements, and apply power to the card. | |
459 | */ | |
460 | if (status & SS_3VCARD) | |
461 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
462 | else if (!(status & SS_XVCARD)) | |
463 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
464 | else { | |
465 | cs_err(skt, "unsupported voltage key.\n"); | |
466 | return CS_BAD_TYPE; | |
467 | } | |
fa912bcb DR |
468 | |
469 | if (skt->power_hook) | |
470 | skt->power_hook(skt, HOOK_POWER_PRE); | |
471 | ||
1da177e4 LT |
472 | skt->socket.flags = 0; |
473 | skt->ops->set_socket(skt, &skt->socket); | |
474 | ||
475 | /* | |
476 | * Wait "vcc_settle" for the supply to stabilise. | |
477 | */ | |
478 | msleep(vcc_settle * 10); | |
479 | ||
480 | skt->ops->get_status(skt, &status); | |
481 | if (!(status & SS_POWERON)) { | |
482 | cs_err(skt, "unable to apply power.\n"); | |
483 | return CS_BAD_TYPE; | |
484 | } | |
485 | ||
fa912bcb DR |
486 | status = socket_reset(skt); |
487 | ||
488 | if (skt->power_hook) | |
489 | skt->power_hook(skt, HOOK_POWER_POST); | |
490 | ||
491 | return status; | |
1da177e4 LT |
492 | } |
493 | ||
494 | /* | |
495 | * Handle card insertion. Setup the socket, reset the card, | |
496 | * and then tell the rest of PCMCIA that a card is present. | |
497 | */ | |
498 | static int socket_insert(struct pcmcia_socket *skt) | |
499 | { | |
500 | int ret; | |
501 | ||
502 | cs_dbg(skt, 4, "insert\n"); | |
503 | ||
504 | if (!cs_socket_get(skt)) | |
505 | return CS_NO_CARD; | |
506 | ||
507 | ret = socket_setup(skt, setup_delay); | |
508 | if (ret == CS_SUCCESS) { | |
509 | skt->state |= SOCKET_PRESENT; | |
807277cb DB |
510 | |
511 | printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n", | |
512 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
513 | skt->sock); | |
514 | ||
1da177e4 LT |
515 | #ifdef CONFIG_CARDBUS |
516 | if (skt->state & SOCKET_CARDBUS) { | |
517 | cb_alloc(skt); | |
518 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
519 | } | |
520 | #endif | |
521 | cs_dbg(skt, 4, "insert done\n"); | |
522 | ||
523 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
524 | } else { | |
525 | socket_shutdown(skt); | |
1da177e4 LT |
526 | } |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | static int socket_suspend(struct pcmcia_socket *skt) | |
532 | { | |
533 | if (skt->state & SOCKET_SUSPEND) | |
534 | return CS_IN_USE; | |
535 | ||
536 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
537 | skt->socket = dead_socket; | |
538 | skt->ops->set_socket(skt, &skt->socket); | |
539 | if (skt->ops->suspend) | |
540 | skt->ops->suspend(skt); | |
541 | skt->state |= SOCKET_SUSPEND; | |
542 | ||
543 | return CS_SUCCESS; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Resume a socket. If a card is present, verify its CIS against | |
548 | * our cached copy. If they are different, the card has been | |
549 | * replaced, and we need to tell the drivers. | |
550 | */ | |
551 | static int socket_resume(struct pcmcia_socket *skt) | |
552 | { | |
553 | int ret; | |
554 | ||
555 | if (!(skt->state & SOCKET_SUSPEND)) | |
556 | return CS_IN_USE; | |
557 | ||
558 | skt->socket = dead_socket; | |
559 | skt->ops->init(skt); | |
560 | skt->ops->set_socket(skt, &skt->socket); | |
561 | ||
562 | if (!(skt->state & SOCKET_PRESENT)) { | |
563 | skt->state &= ~SOCKET_SUSPEND; | |
564 | return socket_insert(skt); | |
565 | } | |
566 | ||
567 | ret = socket_setup(skt, resume_delay); | |
568 | if (ret == CS_SUCCESS) { | |
569 | /* | |
570 | * FIXME: need a better check here for cardbus cards. | |
571 | */ | |
572 | if (verify_cis_cache(skt) != 0) { | |
573 | cs_dbg(skt, 4, "cis mismatch - different card\n"); | |
574 | socket_remove_drivers(skt); | |
575 | destroy_cis_cache(skt); | |
576 | /* | |
577 | * Workaround: give DS time to schedule removal. | |
578 | * Remove me once the 100ms delay is eliminated | |
579 | * in ds.c | |
580 | */ | |
581 | msleep(200); | |
582 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
583 | } else { | |
584 | cs_dbg(skt, 4, "cis matches cache\n"); | |
585 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); | |
586 | } | |
587 | } else { | |
588 | socket_shutdown(skt); | |
1da177e4 LT |
589 | } |
590 | ||
591 | skt->state &= ~SOCKET_SUSPEND; | |
592 | ||
593 | return CS_SUCCESS; | |
594 | } | |
595 | ||
596 | static void socket_remove(struct pcmcia_socket *skt) | |
597 | { | |
807277cb | 598 | printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock); |
1da177e4 | 599 | socket_shutdown(skt); |
1da177e4 LT |
600 | } |
601 | ||
602 | /* | |
603 | * Process a socket card detect status change. | |
604 | * | |
605 | * If we don't have a card already present, delay the detect event for | |
606 | * about 20ms (to be on the safe side) before reading the socket status. | |
607 | * | |
608 | * Some i82365-based systems send multiple SS_DETECT events during card | |
609 | * insertion, and the "card present" status bit seems to bounce. This | |
610 | * will probably be true with GPIO-based card detection systems after | |
611 | * the product has aged. | |
612 | */ | |
613 | static void socket_detect_change(struct pcmcia_socket *skt) | |
614 | { | |
615 | if (!(skt->state & SOCKET_SUSPEND)) { | |
616 | int status; | |
617 | ||
618 | if (!(skt->state & SOCKET_PRESENT)) | |
619 | msleep(20); | |
620 | ||
621 | skt->ops->get_status(skt, &status); | |
622 | if ((skt->state & SOCKET_PRESENT) && | |
623 | !(status & SS_DETECT)) | |
624 | socket_remove(skt); | |
625 | if (!(skt->state & SOCKET_PRESENT) && | |
626 | (status & SS_DETECT)) | |
627 | socket_insert(skt); | |
628 | } | |
629 | } | |
630 | ||
631 | static int pccardd(void *__skt) | |
632 | { | |
633 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
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 */ | |
87373318 | 642 | ret = device_register(&skt->dev); |
1da177e4 LT |
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 | } |
4356d73d DB |
650 | ret = pccard_sysfs_add_socket(&skt->dev); |
651 | if (ret) | |
652 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 653 | |
bf4de6f2 DR |
654 | complete(&skt->thread_done); |
655 | ||
83144186 | 656 | set_freezable(); |
1da177e4 LT |
657 | for (;;) { |
658 | unsigned long flags; | |
659 | unsigned int events; | |
660 | ||
661 | set_current_state(TASK_INTERRUPTIBLE); | |
662 | ||
663 | spin_lock_irqsave(&skt->thread_lock, flags); | |
664 | events = skt->thread_events; | |
665 | skt->thread_events = 0; | |
666 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
667 | ||
668 | if (events) { | |
7fe908dd | 669 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
670 | if (events & SS_DETECT) |
671 | socket_detect_change(skt); | |
672 | if (events & SS_BATDEAD) | |
673 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
674 | if (events & SS_BATWARN) | |
675 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
676 | if (events & SS_READY) | |
677 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 678 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
679 | continue; |
680 | } | |
681 | ||
1da9ab73 | 682 | if (kthread_should_stop()) |
1da177e4 | 683 | break; |
bf4de6f2 DR |
684 | |
685 | schedule(); | |
686 | try_to_freeze(); | |
1da177e4 | 687 | } |
220ec029 SR |
688 | /* make sure we are running before we exit */ |
689 | set_current_state(TASK_RUNNING); | |
690 | ||
1da177e4 | 691 | /* remove from the device core */ |
4356d73d | 692 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 693 | device_unregister(&skt->dev); |
1da177e4 | 694 | |
1da9ab73 | 695 | return 0; |
1da177e4 LT |
696 | } |
697 | ||
698 | /* | |
699 | * Yenta (at least) probes interrupts before registering the socket and | |
700 | * starting the handler thread. | |
701 | */ | |
702 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
703 | { | |
4b7a89a3 | 704 | unsigned long flags; |
1da177e4 LT |
705 | cs_dbg(s, 4, "parse_events: events %08x\n", events); |
706 | if (s->thread) { | |
4b7a89a3 | 707 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 708 | s->thread_events |= events; |
4b7a89a3 | 709 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 710 | |
0b402094 | 711 | wake_up_process(s->thread); |
1da177e4 LT |
712 | } |
713 | } /* pcmcia_parse_events */ | |
33519ddd | 714 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 715 | |
1da177e4 LT |
716 | |
717 | /* register pcmcia_callback */ | |
718 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
719 | { | |
720 | int ret = 0; | |
721 | ||
7fe908dd DB |
722 | /* s->skt_mutex also protects s->callback */ |
723 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
724 | |
725 | if (c) { | |
726 | /* registration */ | |
727 | if (s->callback) { | |
728 | ret = -EBUSY; | |
729 | goto err; | |
730 | } | |
731 | ||
732 | s->callback = c; | |
733 | ||
734 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
735 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
736 | } else | |
737 | s->callback = NULL; | |
738 | err: | |
7fe908dd | 739 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
740 | |
741 | return ret; | |
742 | } | |
743 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
744 | ||
1da177e4 | 745 | |
33519ddd DB |
746 | /* I'm not sure which "reset" function this is supposed to use, |
747 | * but for now, it uses the low-level interface's reset, not the | |
748 | * CIS register. | |
749 | */ | |
1da177e4 LT |
750 | |
751 | int pccard_reset_card(struct pcmcia_socket *skt) | |
752 | { | |
753 | int ret; | |
33519ddd | 754 | |
1da177e4 LT |
755 | cs_dbg(skt, 1, "resetting socket\n"); |
756 | ||
7fe908dd | 757 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
758 | do { |
759 | if (!(skt->state & SOCKET_PRESENT)) { | |
760 | ret = CS_NO_CARD; | |
761 | break; | |
762 | } | |
763 | if (skt->state & SOCKET_SUSPEND) { | |
764 | ret = CS_IN_USE; | |
765 | break; | |
766 | } | |
767 | if (skt->state & SOCKET_CARDBUS) { | |
768 | ret = CS_UNSUPPORTED_FUNCTION; | |
769 | break; | |
770 | } | |
771 | ||
772 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
773 | if (ret == 0) { | |
774 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
775 | if (skt->callback) |
776 | skt->callback->suspend(skt); | |
777 | if (socket_reset(skt) == CS_SUCCESS) { | |
1da177e4 | 778 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
779 | if (skt->callback) |
780 | skt->callback->resume(skt); | |
781 | } | |
1da177e4 LT |
782 | } |
783 | ||
784 | ret = CS_SUCCESS; | |
785 | } while (0); | |
7fe908dd | 786 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
787 | |
788 | return ret; | |
789 | } /* reset_card */ | |
790 | EXPORT_SYMBOL(pccard_reset_card); | |
791 | ||
1da177e4 | 792 | |
33519ddd DB |
793 | /* These shut down or wake up a socket. They are sort of user |
794 | * initiated versions of the APM suspend and resume actions. | |
795 | */ | |
1da177e4 LT |
796 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
797 | { | |
798 | int ret; | |
33519ddd | 799 | |
1da177e4 LT |
800 | cs_dbg(skt, 1, "suspending socket\n"); |
801 | ||
7fe908dd | 802 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
803 | do { |
804 | if (!(skt->state & SOCKET_PRESENT)) { | |
805 | ret = CS_NO_CARD; | |
806 | break; | |
807 | } | |
808 | if (skt->state & SOCKET_CARDBUS) { | |
809 | ret = CS_UNSUPPORTED_FUNCTION; | |
810 | break; | |
811 | } | |
8e9e793d DB |
812 | if (skt->callback) { |
813 | ret = skt->callback->suspend(skt); | |
814 | if (ret) | |
815 | break; | |
816 | } | |
1da177e4 LT |
817 | ret = socket_suspend(skt); |
818 | } while (0); | |
7fe908dd | 819 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
820 | |
821 | return ret; | |
822 | } /* suspend_card */ | |
33519ddd DB |
823 | EXPORT_SYMBOL(pcmcia_suspend_card); |
824 | ||
1da177e4 LT |
825 | |
826 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
827 | { | |
828 | int ret; | |
829 | ||
830 | cs_dbg(skt, 1, "waking up socket\n"); | |
831 | ||
7fe908dd | 832 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
833 | do { |
834 | if (!(skt->state & SOCKET_PRESENT)) { | |
835 | ret = CS_NO_CARD; | |
836 | break; | |
837 | } | |
838 | if (skt->state & SOCKET_CARDBUS) { | |
839 | ret = CS_UNSUPPORTED_FUNCTION; | |
840 | break; | |
841 | } | |
842 | ret = socket_resume(skt); | |
8e9e793d DB |
843 | if (!ret && skt->callback) |
844 | skt->callback->resume(skt); | |
1da177e4 | 845 | } while (0); |
7fe908dd | 846 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
847 | |
848 | return ret; | |
849 | } /* resume_card */ | |
33519ddd | 850 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 851 | |
1da177e4 | 852 | |
33519ddd | 853 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
854 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
855 | { | |
856 | int ret; | |
857 | ||
858 | cs_dbg(skt, 1, "user eject request\n"); | |
859 | ||
7fe908dd | 860 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
861 | do { |
862 | if (!(skt->state & SOCKET_PRESENT)) { | |
863 | ret = -ENODEV; | |
864 | break; | |
865 | } | |
866 | ||
867 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
868 | if (ret != 0) { | |
869 | ret = -EINVAL; | |
870 | break; | |
871 | } | |
872 | ||
873 | socket_remove(skt); | |
874 | ret = 0; | |
875 | } while (0); | |
7fe908dd | 876 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
877 | |
878 | return ret; | |
879 | } /* eject_card */ | |
33519ddd DB |
880 | EXPORT_SYMBOL(pcmcia_eject_card); |
881 | ||
1da177e4 LT |
882 | |
883 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
884 | { | |
885 | int ret; | |
886 | ||
887 | cs_dbg(skt, 1, "user insert request\n"); | |
888 | ||
7fe908dd | 889 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
890 | do { |
891 | if (skt->state & SOCKET_PRESENT) { | |
892 | ret = -EBUSY; | |
893 | break; | |
894 | } | |
895 | if (socket_insert(skt) == CS_NO_CARD) { | |
896 | ret = -ENODEV; | |
897 | break; | |
898 | } | |
899 | ret = 0; | |
900 | } while (0); | |
7fe908dd | 901 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
902 | |
903 | return ret; | |
904 | } /* insert_card */ | |
33519ddd DB |
905 | EXPORT_SYMBOL(pcmcia_insert_card); |
906 | ||
1da177e4 | 907 | |
7eff2e7a KS |
908 | static int pcmcia_socket_uevent(struct device *dev, |
909 | struct kobj_uevent_env *env) | |
3ee13937 DB |
910 | { |
911 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 912 | |
7eff2e7a | 913 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
914 | return -ENOMEM; |
915 | ||
3ee13937 DB |
916 | return 0; |
917 | } | |
918 | ||
1da177e4 | 919 | |
378a33a6 DB |
920 | static struct completion pcmcia_unload; |
921 | ||
922 | static void pcmcia_release_socket_class(struct class *data) | |
923 | { | |
924 | complete(&pcmcia_unload); | |
925 | } | |
926 | ||
927 | ||
1da177e4 LT |
928 | struct class pcmcia_socket_class = { |
929 | .name = "pcmcia_socket", | |
87373318 GKH |
930 | .dev_uevent = pcmcia_socket_uevent, |
931 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 932 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
933 | }; |
934 | EXPORT_SYMBOL(pcmcia_socket_class); | |
935 | ||
936 | ||
937 | static int __init init_pcmcia_cs(void) | |
938 | { | |
378a33a6 | 939 | init_completion(&pcmcia_unload); |
4356d73d | 940 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
941 | } |
942 | ||
943 | static void __exit exit_pcmcia_cs(void) | |
944 | { | |
33519ddd | 945 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 946 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
947 | } |
948 | ||
949 | subsys_initcall(init_pcmcia_cs); | |
950 | module_exit(exit_pcmcia_cs); | |
951 |