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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 | ||
7d16b658 | 64 | #ifdef CONFIG_PCMCIA_DEBUG |
1da177e4 LT |
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 | */ | |
9905d1b4 RW |
101 | static int socket_early_resume(struct pcmcia_socket *skt); |
102 | static int socket_late_resume(struct pcmcia_socket *skt); | |
1da177e4 LT |
103 | static int socket_resume(struct pcmcia_socket *skt); |
104 | static int socket_suspend(struct pcmcia_socket *skt); | |
105 | ||
9905d1b4 RW |
106 | static void pcmcia_socket_dev_run(struct device *dev, |
107 | int (*cb)(struct pcmcia_socket *)) | |
1da177e4 LT |
108 | { |
109 | struct pcmcia_socket *socket; | |
110 | ||
111 | down_read(&pcmcia_socket_list_rwsem); | |
112 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 113 | if (socket->dev.parent != dev) |
1da177e4 | 114 | continue; |
7fe908dd | 115 | mutex_lock(&socket->skt_mutex); |
9905d1b4 | 116 | cb(socket); |
7fe908dd | 117 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
118 | } |
119 | up_read(&pcmcia_socket_list_rwsem); | |
9905d1b4 | 120 | } |
1da177e4 | 121 | |
9905d1b4 RW |
122 | int pcmcia_socket_dev_suspend(struct device *dev) |
123 | { | |
124 | pcmcia_socket_dev_run(dev, socket_suspend); | |
1da177e4 LT |
125 | return 0; |
126 | } | |
127 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
128 | ||
9905d1b4 | 129 | void pcmcia_socket_dev_early_resume(struct device *dev) |
1da177e4 | 130 | { |
9905d1b4 RW |
131 | pcmcia_socket_dev_run(dev, socket_early_resume); |
132 | } | |
133 | EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); | |
1da177e4 | 134 | |
9905d1b4 RW |
135 | void pcmcia_socket_dev_late_resume(struct device *dev) |
136 | { | |
137 | pcmcia_socket_dev_run(dev, socket_late_resume); | |
138 | } | |
139 | EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); | |
1da177e4 | 140 | |
9905d1b4 RW |
141 | int pcmcia_socket_dev_resume(struct device *dev) |
142 | { | |
143 | pcmcia_socket_dev_run(dev, socket_resume); | |
1da177e4 LT |
144 | return 0; |
145 | } | |
146 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
147 | ||
148 | ||
149 | struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt) | |
150 | { | |
87373318 GKH |
151 | struct device *dev = get_device(&skt->dev); |
152 | if (!dev) | |
1da177e4 | 153 | return NULL; |
87373318 | 154 | skt = dev_get_drvdata(dev); |
1da177e4 | 155 | if (!try_module_get(skt->owner)) { |
87373318 | 156 | put_device(&skt->dev); |
1da177e4 LT |
157 | return NULL; |
158 | } | |
159 | return (skt); | |
160 | } | |
161 | EXPORT_SYMBOL(pcmcia_get_socket); | |
162 | ||
163 | ||
164 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
165 | { | |
166 | module_put(skt->owner); | |
87373318 | 167 | put_device(&skt->dev); |
1da177e4 LT |
168 | } |
169 | EXPORT_SYMBOL(pcmcia_put_socket); | |
170 | ||
171 | ||
87373318 | 172 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 173 | { |
87373318 | 174 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
175 | |
176 | complete(&socket->socket_released); | |
177 | } | |
178 | ||
179 | static int pccardd(void *__skt); | |
180 | ||
181 | /** | |
182 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 183 | * @socket: the &socket to register |
1da177e4 LT |
184 | */ |
185 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
186 | { | |
1da9ab73 | 187 | struct task_struct *tsk; |
1da177e4 LT |
188 | int ret; |
189 | ||
87373318 | 190 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
191 | return -EINVAL; |
192 | ||
193 | cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops); | |
194 | ||
195 | spin_lock_init(&socket->lock); | |
196 | ||
1da177e4 | 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; |
25096986 | 231 | dev_set_name(&socket->dev, "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); | |
7fe908dd | 241 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
242 | spin_lock_init(&socket->thread_lock); |
243 | ||
b1769450 DB |
244 | if (socket->resource_ops->init) { |
245 | ret = socket->resource_ops->init(socket); | |
246 | if (ret) | |
247 | goto err; | |
248 | } | |
249 | ||
1da9ab73 SH |
250 | tsk = kthread_run(pccardd, socket, "pccardd"); |
251 | if (IS_ERR(tsk)) { | |
252 | ret = PTR_ERR(tsk); | |
1da177e4 | 253 | goto err; |
1da9ab73 | 254 | } |
1da177e4 LT |
255 | |
256 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 257 | if (!socket->thread) { |
2e55bf6b DB |
258 | dev_printk(KERN_WARNING, &socket->dev, |
259 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
260 | return -EIO; |
261 | } | |
1da9ab73 | 262 | |
1da177e4 LT |
263 | pcmcia_parse_events(socket, SS_DETECT); |
264 | ||
265 | return 0; | |
266 | ||
267 | err: | |
268 | down_write(&pcmcia_socket_list_rwsem); | |
269 | list_del(&socket->socket_list); | |
270 | up_write(&pcmcia_socket_list_rwsem); | |
271 | return ret; | |
272 | } /* pcmcia_register_socket */ | |
273 | EXPORT_SYMBOL(pcmcia_register_socket); | |
274 | ||
275 | ||
276 | /** | |
277 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 278 | * @socket: the &socket to unregister |
1da177e4 LT |
279 | */ |
280 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
281 | { | |
282 | if (!socket) | |
283 | return; | |
284 | ||
285 | cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops); | |
286 | ||
0b402094 | 287 | if (socket->thread) |
1da9ab73 | 288 | kthread_stop(socket->thread); |
0b402094 | 289 | |
1da177e4 LT |
290 | release_cis_mem(socket); |
291 | ||
292 | /* remove from our own list */ | |
293 | down_write(&pcmcia_socket_list_rwsem); | |
294 | list_del(&socket->socket_list); | |
295 | up_write(&pcmcia_socket_list_rwsem); | |
296 | ||
297 | /* wait for sysfs to drop all references */ | |
298 | release_resource_db(socket); | |
299 | wait_for_completion(&socket->socket_released); | |
300 | } /* pcmcia_unregister_socket */ | |
301 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
302 | ||
303 | ||
304 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
305 | { | |
306 | struct pcmcia_socket *s; | |
307 | ||
308 | down_read(&pcmcia_socket_list_rwsem); | |
309 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
310 | if (s->sock == nr) { | |
311 | up_read(&pcmcia_socket_list_rwsem); | |
312 | return s; | |
313 | } | |
314 | up_read(&pcmcia_socket_list_rwsem); | |
315 | ||
316 | return NULL; | |
317 | ||
318 | } | |
319 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
320 | ||
78187865 | 321 | /* |
33519ddd DB |
322 | * The central event handler. Send_event() sends an event to the |
323 | * 16-bit subsystem, which then calls the relevant device drivers. | |
324 | * Parse_events() interprets the event bits from | |
325 | * a card status change report. Do_shutdown() handles the high | |
326 | * priority stuff associated with a card removal. | |
327 | */ | |
1da177e4 LT |
328 | |
329 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
330 | ||
331 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
332 | { | |
333 | int ret; | |
334 | ||
335 | if (s->state & SOCKET_CARDBUS) | |
336 | return 0; | |
337 | ||
338 | cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n", | |
339 | event, priority, s->callback); | |
340 | ||
341 | if (!s->callback) | |
342 | return 0; | |
343 | if (!try_module_get(s->callback->owner)) | |
344 | return 0; | |
345 | ||
346 | ret = s->callback->event(s, event, priority); | |
347 | ||
348 | module_put(s->callback->owner); | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
354 | { | |
355 | cs_dbg(skt, 4, "remove_drivers\n"); | |
356 | ||
357 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
358 | } | |
359 | ||
1da177e4 LT |
360 | static int socket_reset(struct pcmcia_socket *skt) |
361 | { | |
362 | int status, i; | |
363 | ||
364 | cs_dbg(skt, 4, "reset\n"); | |
365 | ||
366 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
367 | skt->ops->set_socket(skt, &skt->socket); | |
368 | udelay((long)reset_time); | |
369 | ||
370 | skt->socket.flags &= ~SS_RESET; | |
371 | skt->ops->set_socket(skt, &skt->socket); | |
372 | ||
373 | msleep(unreset_delay * 10); | |
374 | for (i = 0; i < unreset_limit; i++) { | |
375 | skt->ops->get_status(skt, &status); | |
376 | ||
377 | if (!(status & SS_DETECT)) | |
3939c1ef | 378 | return -ENODEV; |
1da177e4 LT |
379 | |
380 | if (status & SS_READY) | |
4c89e88b | 381 | return 0; |
1da177e4 LT |
382 | |
383 | msleep(unreset_check * 10); | |
384 | } | |
385 | ||
386 | cs_err(skt, "time out after reset.\n"); | |
8567142e | 387 | return -ETIMEDOUT; |
1da177e4 LT |
388 | } |
389 | ||
78187865 | 390 | /* |
6e493882 DR |
391 | * socket_setup() and socket_shutdown() are called by the main event handler |
392 | * when card insertion and removal events are received. | |
393 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
394 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
395 | */ | |
396 | static void socket_shutdown(struct pcmcia_socket *s) | |
397 | { | |
398 | int status; | |
399 | ||
400 | cs_dbg(s, 4, "shutdown\n"); | |
401 | ||
402 | socket_remove_drivers(s); | |
403 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; | |
404 | msleep(shutdown_delay * 10); | |
405 | s->state &= SOCKET_INUSE; | |
406 | ||
407 | /* Blank out the socket state */ | |
408 | s->socket = dead_socket; | |
409 | s->ops->init(s); | |
410 | s->ops->set_socket(s, &s->socket); | |
411 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
412 | s->lock_count = 0; | |
413 | destroy_cis_cache(s); | |
414 | #ifdef CONFIG_CARDBUS | |
415 | cb_free(s); | |
416 | #endif | |
417 | s->functions = 0; | |
6e493882 | 418 | |
afb2c165 DR |
419 | /* give socket some time to power down */ |
420 | msleep(100); | |
421 | ||
6e493882 DR |
422 | s->ops->get_status(s, &status); |
423 | if (status & SS_POWERON) { | |
2e55bf6b DB |
424 | dev_printk(KERN_ERR, &s->dev, |
425 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
426 | } |
427 | ||
428 | cs_socket_put(s); | |
429 | } | |
430 | ||
1da177e4 LT |
431 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
432 | { | |
433 | int status, i; | |
434 | ||
435 | cs_dbg(skt, 4, "setup\n"); | |
436 | ||
437 | skt->ops->get_status(skt, &status); | |
438 | if (!(status & SS_DETECT)) | |
3939c1ef | 439 | return -ENODEV; |
1da177e4 LT |
440 | |
441 | msleep(initial_delay * 10); | |
442 | ||
443 | for (i = 0; i < 100; i++) { | |
444 | skt->ops->get_status(skt, &status); | |
445 | if (!(status & SS_DETECT)) | |
3939c1ef | 446 | return -ENODEV; |
1da177e4 LT |
447 | |
448 | if (!(status & SS_PENDING)) | |
449 | break; | |
450 | ||
451 | msleep(100); | |
452 | } | |
453 | ||
454 | if (status & SS_PENDING) { | |
455 | cs_err(skt, "voltage interrogation timed out.\n"); | |
8567142e | 456 | return -ETIMEDOUT; |
1da177e4 LT |
457 | } |
458 | ||
459 | if (status & SS_CARDBUS) { | |
5bc6b68a RK |
460 | if (!(skt->features & SS_CAP_CARDBUS)) { |
461 | cs_err(skt, "cardbus cards are not supported.\n"); | |
610e2374 | 462 | return -EINVAL; |
5bc6b68a | 463 | } |
1da177e4 | 464 | skt->state |= SOCKET_CARDBUS; |
1da177e4 LT |
465 | } |
466 | ||
467 | /* | |
468 | * Decode the card voltage requirements, and apply power to the card. | |
469 | */ | |
470 | if (status & SS_3VCARD) | |
471 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
472 | else if (!(status & SS_XVCARD)) | |
473 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
474 | else { | |
475 | cs_err(skt, "unsupported voltage key.\n"); | |
610e2374 | 476 | return -EIO; |
1da177e4 | 477 | } |
fa912bcb DR |
478 | |
479 | if (skt->power_hook) | |
480 | skt->power_hook(skt, HOOK_POWER_PRE); | |
481 | ||
1da177e4 LT |
482 | skt->socket.flags = 0; |
483 | skt->ops->set_socket(skt, &skt->socket); | |
484 | ||
485 | /* | |
486 | * Wait "vcc_settle" for the supply to stabilise. | |
487 | */ | |
488 | msleep(vcc_settle * 10); | |
489 | ||
490 | skt->ops->get_status(skt, &status); | |
491 | if (!(status & SS_POWERON)) { | |
492 | cs_err(skt, "unable to apply power.\n"); | |
610e2374 | 493 | return -EIO; |
1da177e4 LT |
494 | } |
495 | ||
fa912bcb DR |
496 | status = socket_reset(skt); |
497 | ||
498 | if (skt->power_hook) | |
499 | skt->power_hook(skt, HOOK_POWER_POST); | |
500 | ||
501 | return status; | |
1da177e4 LT |
502 | } |
503 | ||
504 | /* | |
505 | * Handle card insertion. Setup the socket, reset the card, | |
506 | * and then tell the rest of PCMCIA that a card is present. | |
507 | */ | |
508 | static int socket_insert(struct pcmcia_socket *skt) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | cs_dbg(skt, 4, "insert\n"); | |
513 | ||
514 | if (!cs_socket_get(skt)) | |
3939c1ef | 515 | return -ENODEV; |
1da177e4 LT |
516 | |
517 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 518 | if (ret == 0) { |
1da177e4 | 519 | skt->state |= SOCKET_PRESENT; |
807277cb | 520 | |
2e55bf6b DB |
521 | dev_printk(KERN_NOTICE, &skt->dev, |
522 | "pccard: %s card inserted into slot %d\n", | |
523 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
524 | skt->sock); | |
807277cb | 525 | |
1da177e4 LT |
526 | #ifdef CONFIG_CARDBUS |
527 | if (skt->state & SOCKET_CARDBUS) { | |
528 | cb_alloc(skt); | |
529 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
530 | } | |
531 | #endif | |
532 | cs_dbg(skt, 4, "insert done\n"); | |
533 | ||
534 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
535 | } else { | |
536 | socket_shutdown(skt); | |
1da177e4 LT |
537 | } |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
542 | static int socket_suspend(struct pcmcia_socket *skt) | |
543 | { | |
544 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 545 | return -EBUSY; |
1da177e4 LT |
546 | |
547 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
548 | skt->socket = dead_socket; | |
549 | skt->ops->set_socket(skt, &skt->socket); | |
550 | if (skt->ops->suspend) | |
551 | skt->ops->suspend(skt); | |
552 | skt->state |= SOCKET_SUSPEND; | |
553 | ||
4c89e88b | 554 | return 0; |
1da177e4 LT |
555 | } |
556 | ||
9905d1b4 | 557 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 558 | { |
1da177e4 LT |
559 | skt->socket = dead_socket; |
560 | skt->ops->init(skt); | |
561 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
562 | if (skt->state & SOCKET_PRESENT) |
563 | skt->resume_status = socket_setup(skt, resume_delay); | |
564 | return 0; | |
565 | } | |
1da177e4 | 566 | |
9905d1b4 RW |
567 | static int socket_late_resume(struct pcmcia_socket *skt) |
568 | { | |
1da177e4 LT |
569 | if (!(skt->state & SOCKET_PRESENT)) { |
570 | skt->state &= ~SOCKET_SUSPEND; | |
571 | return socket_insert(skt); | |
572 | } | |
573 | ||
9905d1b4 | 574 | if (skt->resume_status == 0) { |
1da177e4 LT |
575 | /* |
576 | * FIXME: need a better check here for cardbus cards. | |
577 | */ | |
578 | if (verify_cis_cache(skt) != 0) { | |
579 | cs_dbg(skt, 4, "cis mismatch - different card\n"); | |
580 | socket_remove_drivers(skt); | |
581 | destroy_cis_cache(skt); | |
582 | /* | |
583 | * Workaround: give DS time to schedule removal. | |
584 | * Remove me once the 100ms delay is eliminated | |
585 | * in ds.c | |
586 | */ | |
587 | msleep(200); | |
588 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
589 | } else { | |
590 | cs_dbg(skt, 4, "cis matches cache\n"); | |
591 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); | |
592 | } | |
593 | } else { | |
594 | socket_shutdown(skt); | |
1da177e4 LT |
595 | } |
596 | ||
597 | skt->state &= ~SOCKET_SUSPEND; | |
598 | ||
4c89e88b | 599 | return 0; |
1da177e4 LT |
600 | } |
601 | ||
9905d1b4 RW |
602 | /* |
603 | * Resume a socket. If a card is present, verify its CIS against | |
604 | * our cached copy. If they are different, the card has been | |
605 | * replaced, and we need to tell the drivers. | |
606 | */ | |
607 | static int socket_resume(struct pcmcia_socket *skt) | |
608 | { | |
609 | if (!(skt->state & SOCKET_SUSPEND)) | |
610 | return -EBUSY; | |
611 | ||
612 | socket_early_resume(skt); | |
613 | return socket_late_resume(skt); | |
614 | } | |
615 | ||
1da177e4 LT |
616 | static void socket_remove(struct pcmcia_socket *skt) |
617 | { | |
2e55bf6b DB |
618 | dev_printk(KERN_NOTICE, &skt->dev, |
619 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 620 | socket_shutdown(skt); |
1da177e4 LT |
621 | } |
622 | ||
623 | /* | |
624 | * Process a socket card detect status change. | |
625 | * | |
626 | * If we don't have a card already present, delay the detect event for | |
627 | * about 20ms (to be on the safe side) before reading the socket status. | |
628 | * | |
629 | * Some i82365-based systems send multiple SS_DETECT events during card | |
630 | * insertion, and the "card present" status bit seems to bounce. This | |
631 | * will probably be true with GPIO-based card detection systems after | |
632 | * the product has aged. | |
633 | */ | |
634 | static void socket_detect_change(struct pcmcia_socket *skt) | |
635 | { | |
636 | if (!(skt->state & SOCKET_SUSPEND)) { | |
637 | int status; | |
638 | ||
639 | if (!(skt->state & SOCKET_PRESENT)) | |
640 | msleep(20); | |
641 | ||
642 | skt->ops->get_status(skt, &status); | |
643 | if ((skt->state & SOCKET_PRESENT) && | |
644 | !(status & SS_DETECT)) | |
645 | socket_remove(skt); | |
646 | if (!(skt->state & SOCKET_PRESENT) && | |
647 | (status & SS_DETECT)) | |
648 | socket_insert(skt); | |
649 | } | |
650 | } | |
651 | ||
652 | static int pccardd(void *__skt) | |
653 | { | |
654 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
655 | int ret; |
656 | ||
1da177e4 LT |
657 | skt->thread = current; |
658 | skt->socket = dead_socket; | |
659 | skt->ops->init(skt); | |
660 | skt->ops->set_socket(skt, &skt->socket); | |
661 | ||
662 | /* register with the device core */ | |
87373318 | 663 | ret = device_register(&skt->dev); |
1da177e4 | 664 | if (ret) { |
2e55bf6b DB |
665 | dev_printk(KERN_WARNING, &skt->dev, |
666 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 667 | skt->thread = NULL; |
1da9ab73 SH |
668 | complete(&skt->thread_done); |
669 | return 0; | |
1da177e4 | 670 | } |
4356d73d DB |
671 | ret = pccard_sysfs_add_socket(&skt->dev); |
672 | if (ret) | |
673 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 674 | |
bf4de6f2 DR |
675 | complete(&skt->thread_done); |
676 | ||
83144186 | 677 | set_freezable(); |
1da177e4 LT |
678 | for (;;) { |
679 | unsigned long flags; | |
680 | unsigned int events; | |
681 | ||
682 | set_current_state(TASK_INTERRUPTIBLE); | |
683 | ||
684 | spin_lock_irqsave(&skt->thread_lock, flags); | |
685 | events = skt->thread_events; | |
686 | skt->thread_events = 0; | |
687 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
688 | ||
689 | if (events) { | |
7fe908dd | 690 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
691 | if (events & SS_DETECT) |
692 | socket_detect_change(skt); | |
693 | if (events & SS_BATDEAD) | |
694 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
695 | if (events & SS_BATWARN) | |
696 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
697 | if (events & SS_READY) | |
698 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 699 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
700 | continue; |
701 | } | |
702 | ||
1da9ab73 | 703 | if (kthread_should_stop()) |
1da177e4 | 704 | break; |
bf4de6f2 DR |
705 | |
706 | schedule(); | |
707 | try_to_freeze(); | |
1da177e4 | 708 | } |
220ec029 SR |
709 | /* make sure we are running before we exit */ |
710 | set_current_state(TASK_RUNNING); | |
711 | ||
1da177e4 | 712 | /* remove from the device core */ |
4356d73d | 713 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 714 | device_unregister(&skt->dev); |
1da177e4 | 715 | |
1da9ab73 | 716 | return 0; |
1da177e4 LT |
717 | } |
718 | ||
719 | /* | |
720 | * Yenta (at least) probes interrupts before registering the socket and | |
721 | * starting the handler thread. | |
722 | */ | |
723 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
724 | { | |
4b7a89a3 | 725 | unsigned long flags; |
1da177e4 LT |
726 | cs_dbg(s, 4, "parse_events: events %08x\n", events); |
727 | if (s->thread) { | |
4b7a89a3 | 728 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 729 | s->thread_events |= events; |
4b7a89a3 | 730 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 731 | |
0b402094 | 732 | wake_up_process(s->thread); |
1da177e4 LT |
733 | } |
734 | } /* pcmcia_parse_events */ | |
33519ddd | 735 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 736 | |
1da177e4 LT |
737 | |
738 | /* register pcmcia_callback */ | |
739 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
740 | { | |
741 | int ret = 0; | |
742 | ||
7fe908dd DB |
743 | /* s->skt_mutex also protects s->callback */ |
744 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
745 | |
746 | if (c) { | |
747 | /* registration */ | |
748 | if (s->callback) { | |
749 | ret = -EBUSY; | |
750 | goto err; | |
751 | } | |
752 | ||
753 | s->callback = c; | |
754 | ||
755 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
756 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
757 | } else | |
758 | s->callback = NULL; | |
759 | err: | |
7fe908dd | 760 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
761 | |
762 | return ret; | |
763 | } | |
764 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
765 | ||
1da177e4 | 766 | |
33519ddd DB |
767 | /* I'm not sure which "reset" function this is supposed to use, |
768 | * but for now, it uses the low-level interface's reset, not the | |
769 | * CIS register. | |
770 | */ | |
1da177e4 | 771 | |
994917f8 | 772 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
773 | { |
774 | int ret; | |
33519ddd | 775 | |
1da177e4 LT |
776 | cs_dbg(skt, 1, "resetting socket\n"); |
777 | ||
7fe908dd | 778 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
779 | do { |
780 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 781 | ret = -ENODEV; |
1da177e4 LT |
782 | break; |
783 | } | |
784 | if (skt->state & SOCKET_SUSPEND) { | |
f958095e | 785 | ret = -EBUSY; |
1da177e4 LT |
786 | break; |
787 | } | |
788 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 789 | ret = -EPERM; |
1da177e4 LT |
790 | break; |
791 | } | |
792 | ||
793 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
794 | if (ret == 0) { | |
795 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
796 | if (skt->callback) |
797 | skt->callback->suspend(skt); | |
4c89e88b | 798 | if (socket_reset(skt) == 0) { |
1da177e4 | 799 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
800 | if (skt->callback) |
801 | skt->callback->resume(skt); | |
802 | } | |
1da177e4 LT |
803 | } |
804 | ||
4c89e88b | 805 | ret = 0; |
1da177e4 | 806 | } while (0); |
7fe908dd | 807 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
808 | |
809 | return ret; | |
810 | } /* reset_card */ | |
994917f8 | 811 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 812 | |
1da177e4 | 813 | |
33519ddd DB |
814 | /* These shut down or wake up a socket. They are sort of user |
815 | * initiated versions of the APM suspend and resume actions. | |
816 | */ | |
1da177e4 LT |
817 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
818 | { | |
819 | int ret; | |
33519ddd | 820 | |
1da177e4 LT |
821 | cs_dbg(skt, 1, "suspending socket\n"); |
822 | ||
7fe908dd | 823 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
824 | do { |
825 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 826 | ret = -ENODEV; |
1da177e4 LT |
827 | break; |
828 | } | |
829 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 830 | ret = -EPERM; |
1da177e4 LT |
831 | break; |
832 | } | |
8e9e793d DB |
833 | if (skt->callback) { |
834 | ret = skt->callback->suspend(skt); | |
835 | if (ret) | |
836 | break; | |
837 | } | |
1da177e4 LT |
838 | ret = socket_suspend(skt); |
839 | } while (0); | |
7fe908dd | 840 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
841 | |
842 | return ret; | |
843 | } /* suspend_card */ | |
33519ddd DB |
844 | EXPORT_SYMBOL(pcmcia_suspend_card); |
845 | ||
1da177e4 LT |
846 | |
847 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
848 | { | |
849 | int ret; | |
850 | ||
851 | cs_dbg(skt, 1, "waking up socket\n"); | |
852 | ||
7fe908dd | 853 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
854 | do { |
855 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 856 | ret = -ENODEV; |
1da177e4 LT |
857 | break; |
858 | } | |
859 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 860 | ret = -EPERM; |
1da177e4 LT |
861 | break; |
862 | } | |
863 | ret = socket_resume(skt); | |
8e9e793d DB |
864 | if (!ret && skt->callback) |
865 | skt->callback->resume(skt); | |
1da177e4 | 866 | } while (0); |
7fe908dd | 867 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
868 | |
869 | return ret; | |
870 | } /* resume_card */ | |
33519ddd | 871 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 872 | |
1da177e4 | 873 | |
33519ddd | 874 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
875 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
876 | { | |
877 | int ret; | |
878 | ||
879 | cs_dbg(skt, 1, "user eject request\n"); | |
880 | ||
7fe908dd | 881 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
882 | do { |
883 | if (!(skt->state & SOCKET_PRESENT)) { | |
884 | ret = -ENODEV; | |
885 | break; | |
886 | } | |
887 | ||
888 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
889 | if (ret != 0) { | |
890 | ret = -EINVAL; | |
891 | break; | |
892 | } | |
893 | ||
894 | socket_remove(skt); | |
895 | ret = 0; | |
896 | } while (0); | |
7fe908dd | 897 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
898 | |
899 | return ret; | |
900 | } /* eject_card */ | |
33519ddd DB |
901 | EXPORT_SYMBOL(pcmcia_eject_card); |
902 | ||
1da177e4 LT |
903 | |
904 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
905 | { | |
906 | int ret; | |
907 | ||
908 | cs_dbg(skt, 1, "user insert request\n"); | |
909 | ||
7fe908dd | 910 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
911 | do { |
912 | if (skt->state & SOCKET_PRESENT) { | |
913 | ret = -EBUSY; | |
914 | break; | |
915 | } | |
3939c1ef | 916 | if (socket_insert(skt) == -ENODEV) { |
1da177e4 LT |
917 | ret = -ENODEV; |
918 | break; | |
919 | } | |
920 | ret = 0; | |
921 | } while (0); | |
7fe908dd | 922 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
923 | |
924 | return ret; | |
925 | } /* insert_card */ | |
33519ddd DB |
926 | EXPORT_SYMBOL(pcmcia_insert_card); |
927 | ||
1da177e4 | 928 | |
7eff2e7a KS |
929 | static int pcmcia_socket_uevent(struct device *dev, |
930 | struct kobj_uevent_env *env) | |
3ee13937 DB |
931 | { |
932 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 933 | |
7eff2e7a | 934 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
935 | return -ENOMEM; |
936 | ||
3ee13937 DB |
937 | return 0; |
938 | } | |
939 | ||
1da177e4 | 940 | |
378a33a6 DB |
941 | static struct completion pcmcia_unload; |
942 | ||
943 | static void pcmcia_release_socket_class(struct class *data) | |
944 | { | |
945 | complete(&pcmcia_unload); | |
946 | } | |
947 | ||
948 | ||
1da177e4 LT |
949 | struct class pcmcia_socket_class = { |
950 | .name = "pcmcia_socket", | |
87373318 GKH |
951 | .dev_uevent = pcmcia_socket_uevent, |
952 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 953 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
954 | }; |
955 | EXPORT_SYMBOL(pcmcia_socket_class); | |
956 | ||
957 | ||
958 | static int __init init_pcmcia_cs(void) | |
959 | { | |
378a33a6 | 960 | init_completion(&pcmcia_unload); |
4356d73d | 961 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
962 | } |
963 | ||
964 | static void __exit exit_pcmcia_cs(void) | |
965 | { | |
33519ddd | 966 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 967 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
968 | } |
969 | ||
970 | subsys_initcall(init_pcmcia_cs); | |
971 | module_exit(exit_pcmcia_cs); | |
972 |