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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 | ||
1da177e4 LT |
64 | |
65 | socket_state_t dead_socket = { | |
66 | .csc_mask = SS_DETECT, | |
67 | }; | |
33519ddd | 68 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
69 | |
70 | ||
71 | /* List of all sockets, protected by a rwsem */ | |
72 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 73 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 74 | |
33519ddd DB |
75 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
76 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 77 | |
1da177e4 | 78 | |
78187865 | 79 | /* |
33519ddd DB |
80 | * Low-level PCMCIA socket drivers need to register with the PCCard |
81 | * core using pcmcia_register_socket. | |
82 | * | |
83 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
84 | * .drv struct: |
85 | * - pcmcia_socket_dev_suspend | |
86 | * - pcmcia_socket_dev_resume | |
87 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
88 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
89 | */ | |
90 | static int socket_resume(struct pcmcia_socket *skt); | |
91 | static int socket_suspend(struct pcmcia_socket *skt); | |
92 | ||
827b4649 | 93 | int pcmcia_socket_dev_suspend(struct device *dev) |
1da177e4 LT |
94 | { |
95 | struct pcmcia_socket *socket; | |
96 | ||
97 | down_read(&pcmcia_socket_list_rwsem); | |
98 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 99 | if (socket->dev.parent != dev) |
1da177e4 | 100 | continue; |
7fe908dd | 101 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 102 | socket_suspend(socket); |
7fe908dd | 103 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
104 | } |
105 | up_read(&pcmcia_socket_list_rwsem); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
110 | ||
111 | int pcmcia_socket_dev_resume(struct device *dev) | |
112 | { | |
113 | struct pcmcia_socket *socket; | |
114 | ||
115 | down_read(&pcmcia_socket_list_rwsem); | |
116 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 117 | if (socket->dev.parent != dev) |
1da177e4 | 118 | continue; |
7fe908dd | 119 | mutex_lock(&socket->skt_mutex); |
1da177e4 | 120 | socket_resume(socket); |
7fe908dd | 121 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
122 | } |
123 | up_read(&pcmcia_socket_list_rwsem); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
128 | ||
129 | ||
130 | struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt) | |
131 | { | |
87373318 GKH |
132 | struct device *dev = get_device(&skt->dev); |
133 | if (!dev) | |
1da177e4 | 134 | return NULL; |
87373318 | 135 | skt = dev_get_drvdata(dev); |
1da177e4 | 136 | if (!try_module_get(skt->owner)) { |
87373318 | 137 | put_device(&skt->dev); |
1da177e4 LT |
138 | return NULL; |
139 | } | |
140 | return (skt); | |
141 | } | |
142 | EXPORT_SYMBOL(pcmcia_get_socket); | |
143 | ||
144 | ||
145 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
146 | { | |
147 | module_put(skt->owner); | |
87373318 | 148 | put_device(&skt->dev); |
1da177e4 LT |
149 | } |
150 | EXPORT_SYMBOL(pcmcia_put_socket); | |
151 | ||
152 | ||
87373318 | 153 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 154 | { |
87373318 | 155 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
156 | |
157 | complete(&socket->socket_released); | |
158 | } | |
159 | ||
160 | static int pccardd(void *__skt); | |
161 | ||
162 | /** | |
163 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 164 | * @socket: the &socket to register |
1da177e4 LT |
165 | */ |
166 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
167 | { | |
1da9ab73 | 168 | struct task_struct *tsk; |
1da177e4 LT |
169 | int ret; |
170 | ||
87373318 | 171 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
172 | return -EINVAL; |
173 | ||
d50dbec3 | 174 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 LT |
175 | |
176 | spin_lock_init(&socket->lock); | |
177 | ||
1da177e4 | 178 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
179 | * register more than 2^sizeof(unsigned int) pcmcia |
180 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
181 | * anyways, so I don't care] */ |
182 | down_write(&pcmcia_socket_list_rwsem); | |
183 | if (list_empty(&pcmcia_socket_list)) | |
184 | socket->sock = 0; | |
185 | else { | |
186 | unsigned int found, i = 1; | |
187 | struct pcmcia_socket *tmp; | |
188 | do { | |
189 | found = 1; | |
190 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
191 | if (tmp->sock == i) | |
192 | found = 0; | |
193 | } | |
194 | i++; | |
195 | } while (!found); | |
196 | socket->sock = i - 1; | |
197 | } | |
198 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
199 | up_write(&pcmcia_socket_list_rwsem); | |
200 | ||
5bc6b68a RK |
201 | #ifndef CONFIG_CARDBUS |
202 | /* | |
203 | * If we do not support Cardbus, ensure that | |
204 | * the Cardbus socket capability is disabled. | |
205 | */ | |
206 | socket->features &= ~SS_CAP_CARDBUS; | |
207 | #endif | |
1da177e4 LT |
208 | |
209 | /* set proper values in socket->dev */ | |
87373318 | 210 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 211 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 212 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
213 | |
214 | /* base address = 0, map = 0 */ | |
215 | socket->cis_mem.flags = 0; | |
216 | socket->cis_mem.speed = cis_speed; | |
217 | ||
218 | INIT_LIST_HEAD(&socket->cis_cache); | |
219 | ||
220 | init_completion(&socket->socket_released); | |
221 | init_completion(&socket->thread_done); | |
7fe908dd | 222 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
223 | spin_lock_init(&socket->thread_lock); |
224 | ||
b1769450 DB |
225 | if (socket->resource_ops->init) { |
226 | ret = socket->resource_ops->init(socket); | |
227 | if (ret) | |
228 | goto err; | |
229 | } | |
230 | ||
1da9ab73 SH |
231 | tsk = kthread_run(pccardd, socket, "pccardd"); |
232 | if (IS_ERR(tsk)) { | |
233 | ret = PTR_ERR(tsk); | |
1da177e4 | 234 | goto err; |
1da9ab73 | 235 | } |
1da177e4 LT |
236 | |
237 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 238 | if (!socket->thread) { |
2e55bf6b DB |
239 | dev_printk(KERN_WARNING, &socket->dev, |
240 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
241 | return -EIO; |
242 | } | |
1da9ab73 | 243 | |
1da177e4 LT |
244 | pcmcia_parse_events(socket, SS_DETECT); |
245 | ||
246 | return 0; | |
247 | ||
248 | err: | |
249 | down_write(&pcmcia_socket_list_rwsem); | |
250 | list_del(&socket->socket_list); | |
251 | up_write(&pcmcia_socket_list_rwsem); | |
252 | return ret; | |
253 | } /* pcmcia_register_socket */ | |
254 | EXPORT_SYMBOL(pcmcia_register_socket); | |
255 | ||
256 | ||
257 | /** | |
258 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 259 | * @socket: the &socket to unregister |
1da177e4 LT |
260 | */ |
261 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
262 | { | |
263 | if (!socket) | |
264 | return; | |
265 | ||
d50dbec3 | 266 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 267 | |
0b402094 | 268 | if (socket->thread) |
1da9ab73 | 269 | kthread_stop(socket->thread); |
0b402094 | 270 | |
1da177e4 LT |
271 | release_cis_mem(socket); |
272 | ||
273 | /* remove from our own list */ | |
274 | down_write(&pcmcia_socket_list_rwsem); | |
275 | list_del(&socket->socket_list); | |
276 | up_write(&pcmcia_socket_list_rwsem); | |
277 | ||
278 | /* wait for sysfs to drop all references */ | |
279 | release_resource_db(socket); | |
280 | wait_for_completion(&socket->socket_released); | |
281 | } /* pcmcia_unregister_socket */ | |
282 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
283 | ||
284 | ||
285 | struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr) | |
286 | { | |
287 | struct pcmcia_socket *s; | |
288 | ||
289 | down_read(&pcmcia_socket_list_rwsem); | |
290 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
291 | if (s->sock == nr) { | |
292 | up_read(&pcmcia_socket_list_rwsem); | |
293 | return s; | |
294 | } | |
295 | up_read(&pcmcia_socket_list_rwsem); | |
296 | ||
297 | return NULL; | |
298 | ||
299 | } | |
300 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
301 | ||
78187865 | 302 | /* |
33519ddd DB |
303 | * The central event handler. Send_event() sends an event to the |
304 | * 16-bit subsystem, which then calls the relevant device drivers. | |
305 | * Parse_events() interprets the event bits from | |
306 | * a card status change report. Do_shutdown() handles the high | |
307 | * priority stuff associated with a card removal. | |
308 | */ | |
1da177e4 LT |
309 | |
310 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
311 | ||
312 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
313 | { | |
314 | int ret; | |
315 | ||
316 | if (s->state & SOCKET_CARDBUS) | |
317 | return 0; | |
318 | ||
d50dbec3 | 319 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
320 | event, priority, s->callback); |
321 | ||
322 | if (!s->callback) | |
323 | return 0; | |
324 | if (!try_module_get(s->callback->owner)) | |
325 | return 0; | |
326 | ||
327 | ret = s->callback->event(s, event, priority); | |
328 | ||
329 | module_put(s->callback->owner); | |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
334 | static void socket_remove_drivers(struct pcmcia_socket *skt) | |
335 | { | |
d50dbec3 | 336 | dev_dbg(&skt->dev, "remove_drivers\n"); |
1da177e4 LT |
337 | |
338 | send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); | |
339 | } | |
340 | ||
1da177e4 LT |
341 | static int socket_reset(struct pcmcia_socket *skt) |
342 | { | |
343 | int status, i; | |
344 | ||
d50dbec3 | 345 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
346 | |
347 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
348 | skt->ops->set_socket(skt, &skt->socket); | |
349 | udelay((long)reset_time); | |
350 | ||
351 | skt->socket.flags &= ~SS_RESET; | |
352 | skt->ops->set_socket(skt, &skt->socket); | |
353 | ||
354 | msleep(unreset_delay * 10); | |
355 | for (i = 0; i < unreset_limit; i++) { | |
356 | skt->ops->get_status(skt, &status); | |
357 | ||
358 | if (!(status & SS_DETECT)) | |
3939c1ef | 359 | return -ENODEV; |
1da177e4 LT |
360 | |
361 | if (status & SS_READY) | |
4c89e88b | 362 | return 0; |
1da177e4 LT |
363 | |
364 | msleep(unreset_check * 10); | |
365 | } | |
366 | ||
d50dbec3 | 367 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 368 | return -ETIMEDOUT; |
1da177e4 LT |
369 | } |
370 | ||
78187865 | 371 | /* |
6e493882 DR |
372 | * socket_setup() and socket_shutdown() are called by the main event handler |
373 | * when card insertion and removal events are received. | |
374 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
375 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
376 | */ | |
377 | static void socket_shutdown(struct pcmcia_socket *s) | |
378 | { | |
379 | int status; | |
380 | ||
d50dbec3 | 381 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 DR |
382 | |
383 | socket_remove_drivers(s); | |
384 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; | |
385 | msleep(shutdown_delay * 10); | |
386 | s->state &= SOCKET_INUSE; | |
387 | ||
388 | /* Blank out the socket state */ | |
389 | s->socket = dead_socket; | |
390 | s->ops->init(s); | |
391 | s->ops->set_socket(s, &s->socket); | |
392 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
393 | s->lock_count = 0; | |
394 | destroy_cis_cache(s); | |
395 | #ifdef CONFIG_CARDBUS | |
396 | cb_free(s); | |
397 | #endif | |
398 | s->functions = 0; | |
6e493882 | 399 | |
afb2c165 DR |
400 | /* give socket some time to power down */ |
401 | msleep(100); | |
402 | ||
6e493882 DR |
403 | s->ops->get_status(s, &status); |
404 | if (status & SS_POWERON) { | |
2e55bf6b DB |
405 | dev_printk(KERN_ERR, &s->dev, |
406 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
407 | } |
408 | ||
409 | cs_socket_put(s); | |
410 | } | |
411 | ||
1da177e4 LT |
412 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
413 | { | |
414 | int status, i; | |
415 | ||
d50dbec3 | 416 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
417 | |
418 | skt->ops->get_status(skt, &status); | |
419 | if (!(status & SS_DETECT)) | |
3939c1ef | 420 | return -ENODEV; |
1da177e4 LT |
421 | |
422 | msleep(initial_delay * 10); | |
423 | ||
424 | for (i = 0; i < 100; i++) { | |
425 | skt->ops->get_status(skt, &status); | |
426 | if (!(status & SS_DETECT)) | |
3939c1ef | 427 | return -ENODEV; |
1da177e4 LT |
428 | |
429 | if (!(status & SS_PENDING)) | |
430 | break; | |
431 | ||
432 | msleep(100); | |
433 | } | |
434 | ||
435 | if (status & SS_PENDING) { | |
d50dbec3 DB |
436 | dev_printk(KERN_ERR, &skt->dev, |
437 | "voltage interrogation timed out.\n"); | |
8567142e | 438 | return -ETIMEDOUT; |
1da177e4 LT |
439 | } |
440 | ||
441 | if (status & SS_CARDBUS) { | |
5bc6b68a | 442 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
443 | dev_printk(KERN_ERR, &skt->dev, |
444 | "cardbus cards are not supported.\n"); | |
610e2374 | 445 | return -EINVAL; |
5bc6b68a | 446 | } |
1da177e4 | 447 | skt->state |= SOCKET_CARDBUS; |
1da177e4 LT |
448 | } |
449 | ||
450 | /* | |
451 | * Decode the card voltage requirements, and apply power to the card. | |
452 | */ | |
453 | if (status & SS_3VCARD) | |
454 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
455 | else if (!(status & SS_XVCARD)) | |
456 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
457 | else { | |
d50dbec3 | 458 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 459 | return -EIO; |
1da177e4 | 460 | } |
fa912bcb DR |
461 | |
462 | if (skt->power_hook) | |
463 | skt->power_hook(skt, HOOK_POWER_PRE); | |
464 | ||
1da177e4 LT |
465 | skt->socket.flags = 0; |
466 | skt->ops->set_socket(skt, &skt->socket); | |
467 | ||
468 | /* | |
469 | * Wait "vcc_settle" for the supply to stabilise. | |
470 | */ | |
471 | msleep(vcc_settle * 10); | |
472 | ||
473 | skt->ops->get_status(skt, &status); | |
474 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 475 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 476 | return -EIO; |
1da177e4 LT |
477 | } |
478 | ||
fa912bcb DR |
479 | status = socket_reset(skt); |
480 | ||
481 | if (skt->power_hook) | |
482 | skt->power_hook(skt, HOOK_POWER_POST); | |
483 | ||
484 | return status; | |
1da177e4 LT |
485 | } |
486 | ||
487 | /* | |
488 | * Handle card insertion. Setup the socket, reset the card, | |
489 | * and then tell the rest of PCMCIA that a card is present. | |
490 | */ | |
491 | static int socket_insert(struct pcmcia_socket *skt) | |
492 | { | |
493 | int ret; | |
494 | ||
d50dbec3 | 495 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 LT |
496 | |
497 | if (!cs_socket_get(skt)) | |
3939c1ef | 498 | return -ENODEV; |
1da177e4 LT |
499 | |
500 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 501 | if (ret == 0) { |
1da177e4 | 502 | skt->state |= SOCKET_PRESENT; |
807277cb | 503 | |
2e55bf6b DB |
504 | dev_printk(KERN_NOTICE, &skt->dev, |
505 | "pccard: %s card inserted into slot %d\n", | |
506 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
507 | skt->sock); | |
807277cb | 508 | |
1da177e4 LT |
509 | #ifdef CONFIG_CARDBUS |
510 | if (skt->state & SOCKET_CARDBUS) { | |
511 | cb_alloc(skt); | |
512 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
513 | } | |
514 | #endif | |
d50dbec3 | 515 | dev_dbg(&skt->dev, "insert done\n"); |
1da177e4 LT |
516 | |
517 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
518 | } else { | |
519 | socket_shutdown(skt); | |
1da177e4 LT |
520 | } |
521 | ||
522 | return ret; | |
523 | } | |
524 | ||
525 | static int socket_suspend(struct pcmcia_socket *skt) | |
526 | { | |
527 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 528 | return -EBUSY; |
1da177e4 LT |
529 | |
530 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); | |
531 | skt->socket = dead_socket; | |
532 | skt->ops->set_socket(skt, &skt->socket); | |
533 | if (skt->ops->suspend) | |
534 | skt->ops->suspend(skt); | |
535 | skt->state |= SOCKET_SUSPEND; | |
536 | ||
4c89e88b | 537 | return 0; |
1da177e4 LT |
538 | } |
539 | ||
540 | /* | |
541 | * Resume a socket. If a card is present, verify its CIS against | |
542 | * our cached copy. If they are different, the card has been | |
543 | * replaced, and we need to tell the drivers. | |
544 | */ | |
545 | static int socket_resume(struct pcmcia_socket *skt) | |
546 | { | |
547 | int ret; | |
548 | ||
549 | if (!(skt->state & SOCKET_SUSPEND)) | |
f958095e | 550 | return -EBUSY; |
1da177e4 LT |
551 | |
552 | skt->socket = dead_socket; | |
553 | skt->ops->init(skt); | |
554 | skt->ops->set_socket(skt, &skt->socket); | |
555 | ||
556 | if (!(skt->state & SOCKET_PRESENT)) { | |
557 | skt->state &= ~SOCKET_SUSPEND; | |
558 | return socket_insert(skt); | |
559 | } | |
560 | ||
561 | ret = socket_setup(skt, resume_delay); | |
4c89e88b | 562 | if (ret == 0) { |
1da177e4 LT |
563 | /* |
564 | * FIXME: need a better check here for cardbus cards. | |
565 | */ | |
566 | if (verify_cis_cache(skt) != 0) { | |
d50dbec3 | 567 | dev_dbg(&skt->dev, "cis mismatch - different card\n"); |
1da177e4 LT |
568 | socket_remove_drivers(skt); |
569 | destroy_cis_cache(skt); | |
570 | /* | |
571 | * Workaround: give DS time to schedule removal. | |
572 | * Remove me once the 100ms delay is eliminated | |
573 | * in ds.c | |
574 | */ | |
575 | msleep(200); | |
576 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
577 | } else { | |
d50dbec3 | 578 | dev_dbg(&skt->dev, "cis matches cache\n"); |
1da177e4 LT |
579 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
580 | } | |
581 | } else { | |
582 | socket_shutdown(skt); | |
1da177e4 LT |
583 | } |
584 | ||
585 | skt->state &= ~SOCKET_SUSPEND; | |
586 | ||
4c89e88b | 587 | return 0; |
1da177e4 LT |
588 | } |
589 | ||
590 | static void socket_remove(struct pcmcia_socket *skt) | |
591 | { | |
2e55bf6b DB |
592 | dev_printk(KERN_NOTICE, &skt->dev, |
593 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 594 | socket_shutdown(skt); |
1da177e4 LT |
595 | } |
596 | ||
597 | /* | |
598 | * Process a socket card detect status change. | |
599 | * | |
600 | * If we don't have a card already present, delay the detect event for | |
601 | * about 20ms (to be on the safe side) before reading the socket status. | |
602 | * | |
603 | * Some i82365-based systems send multiple SS_DETECT events during card | |
604 | * insertion, and the "card present" status bit seems to bounce. This | |
605 | * will probably be true with GPIO-based card detection systems after | |
606 | * the product has aged. | |
607 | */ | |
608 | static void socket_detect_change(struct pcmcia_socket *skt) | |
609 | { | |
610 | if (!(skt->state & SOCKET_SUSPEND)) { | |
611 | int status; | |
612 | ||
613 | if (!(skt->state & SOCKET_PRESENT)) | |
614 | msleep(20); | |
615 | ||
616 | skt->ops->get_status(skt, &status); | |
617 | if ((skt->state & SOCKET_PRESENT) && | |
618 | !(status & SS_DETECT)) | |
619 | socket_remove(skt); | |
620 | if (!(skt->state & SOCKET_PRESENT) && | |
621 | (status & SS_DETECT)) | |
622 | socket_insert(skt); | |
623 | } | |
624 | } | |
625 | ||
626 | static int pccardd(void *__skt) | |
627 | { | |
628 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
629 | int ret; |
630 | ||
1da177e4 LT |
631 | skt->thread = current; |
632 | skt->socket = dead_socket; | |
633 | skt->ops->init(skt); | |
634 | skt->ops->set_socket(skt, &skt->socket); | |
635 | ||
636 | /* register with the device core */ | |
87373318 | 637 | ret = device_register(&skt->dev); |
1da177e4 | 638 | if (ret) { |
2e55bf6b DB |
639 | dev_printk(KERN_WARNING, &skt->dev, |
640 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 641 | skt->thread = NULL; |
1da9ab73 SH |
642 | complete(&skt->thread_done); |
643 | return 0; | |
1da177e4 | 644 | } |
4356d73d DB |
645 | ret = pccard_sysfs_add_socket(&skt->dev); |
646 | if (ret) | |
647 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 648 | |
bf4de6f2 DR |
649 | complete(&skt->thread_done); |
650 | ||
83144186 | 651 | set_freezable(); |
1da177e4 LT |
652 | for (;;) { |
653 | unsigned long flags; | |
654 | unsigned int events; | |
655 | ||
656 | set_current_state(TASK_INTERRUPTIBLE); | |
657 | ||
658 | spin_lock_irqsave(&skt->thread_lock, flags); | |
659 | events = skt->thread_events; | |
660 | skt->thread_events = 0; | |
661 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
662 | ||
663 | if (events) { | |
7fe908dd | 664 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
665 | if (events & SS_DETECT) |
666 | socket_detect_change(skt); | |
667 | if (events & SS_BATDEAD) | |
668 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
669 | if (events & SS_BATWARN) | |
670 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
671 | if (events & SS_READY) | |
672 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 673 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
674 | continue; |
675 | } | |
676 | ||
1da9ab73 | 677 | if (kthread_should_stop()) |
1da177e4 | 678 | break; |
bf4de6f2 DR |
679 | |
680 | schedule(); | |
681 | try_to_freeze(); | |
1da177e4 | 682 | } |
220ec029 SR |
683 | /* make sure we are running before we exit */ |
684 | set_current_state(TASK_RUNNING); | |
685 | ||
1da177e4 | 686 | /* remove from the device core */ |
4356d73d | 687 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 688 | device_unregister(&skt->dev); |
1da177e4 | 689 | |
1da9ab73 | 690 | return 0; |
1da177e4 LT |
691 | } |
692 | ||
693 | /* | |
694 | * Yenta (at least) probes interrupts before registering the socket and | |
695 | * starting the handler thread. | |
696 | */ | |
697 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
698 | { | |
4b7a89a3 | 699 | unsigned long flags; |
d50dbec3 | 700 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 701 | if (s->thread) { |
4b7a89a3 | 702 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 703 | s->thread_events |= events; |
4b7a89a3 | 704 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 705 | |
0b402094 | 706 | wake_up_process(s->thread); |
1da177e4 LT |
707 | } |
708 | } /* pcmcia_parse_events */ | |
33519ddd | 709 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 710 | |
1da177e4 LT |
711 | |
712 | /* register pcmcia_callback */ | |
713 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
714 | { | |
715 | int ret = 0; | |
716 | ||
7fe908dd DB |
717 | /* s->skt_mutex also protects s->callback */ |
718 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
719 | |
720 | if (c) { | |
721 | /* registration */ | |
722 | if (s->callback) { | |
723 | ret = -EBUSY; | |
724 | goto err; | |
725 | } | |
726 | ||
727 | s->callback = c; | |
728 | ||
729 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
730 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
731 | } else | |
732 | s->callback = NULL; | |
733 | err: | |
7fe908dd | 734 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
735 | |
736 | return ret; | |
737 | } | |
738 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
739 | ||
1da177e4 | 740 | |
33519ddd DB |
741 | /* I'm not sure which "reset" function this is supposed to use, |
742 | * but for now, it uses the low-level interface's reset, not the | |
743 | * CIS register. | |
744 | */ | |
1da177e4 | 745 | |
994917f8 | 746 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
747 | { |
748 | int ret; | |
33519ddd | 749 | |
d50dbec3 | 750 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 751 | |
7fe908dd | 752 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
753 | do { |
754 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 755 | ret = -ENODEV; |
1da177e4 LT |
756 | break; |
757 | } | |
758 | if (skt->state & SOCKET_SUSPEND) { | |
f958095e | 759 | ret = -EBUSY; |
1da177e4 LT |
760 | break; |
761 | } | |
762 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 763 | ret = -EPERM; |
1da177e4 LT |
764 | break; |
765 | } | |
766 | ||
767 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
768 | if (ret == 0) { | |
769 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
770 | if (skt->callback) |
771 | skt->callback->suspend(skt); | |
4c89e88b | 772 | if (socket_reset(skt) == 0) { |
1da177e4 | 773 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
774 | if (skt->callback) |
775 | skt->callback->resume(skt); | |
776 | } | |
1da177e4 LT |
777 | } |
778 | ||
4c89e88b | 779 | ret = 0; |
1da177e4 | 780 | } while (0); |
7fe908dd | 781 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
782 | |
783 | return ret; | |
784 | } /* reset_card */ | |
994917f8 | 785 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 786 | |
1da177e4 | 787 | |
33519ddd DB |
788 | /* These shut down or wake up a socket. They are sort of user |
789 | * initiated versions of the APM suspend and resume actions. | |
790 | */ | |
1da177e4 LT |
791 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
792 | { | |
793 | int ret; | |
33519ddd | 794 | |
d50dbec3 | 795 | dev_dbg(&skt->dev, "suspending socket\n"); |
1da177e4 | 796 | |
7fe908dd | 797 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
798 | do { |
799 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 800 | ret = -ENODEV; |
1da177e4 LT |
801 | break; |
802 | } | |
803 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 804 | ret = -EPERM; |
1da177e4 LT |
805 | break; |
806 | } | |
8e9e793d DB |
807 | if (skt->callback) { |
808 | ret = skt->callback->suspend(skt); | |
809 | if (ret) | |
810 | break; | |
811 | } | |
1da177e4 LT |
812 | ret = socket_suspend(skt); |
813 | } while (0); | |
7fe908dd | 814 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
815 | |
816 | return ret; | |
817 | } /* suspend_card */ | |
33519ddd DB |
818 | EXPORT_SYMBOL(pcmcia_suspend_card); |
819 | ||
1da177e4 LT |
820 | |
821 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
822 | { | |
823 | int ret; | |
824 | ||
d50dbec3 | 825 | dev_dbg(&skt->dev, "waking up socket\n"); |
1da177e4 | 826 | |
7fe908dd | 827 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
828 | do { |
829 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 830 | ret = -ENODEV; |
1da177e4 LT |
831 | break; |
832 | } | |
833 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 834 | ret = -EPERM; |
1da177e4 LT |
835 | break; |
836 | } | |
837 | ret = socket_resume(skt); | |
8e9e793d DB |
838 | if (!ret && skt->callback) |
839 | skt->callback->resume(skt); | |
1da177e4 | 840 | } while (0); |
7fe908dd | 841 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
842 | |
843 | return ret; | |
844 | } /* resume_card */ | |
33519ddd | 845 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 846 | |
1da177e4 | 847 | |
33519ddd | 848 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
849 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
850 | { | |
851 | int ret; | |
852 | ||
d50dbec3 | 853 | dev_dbg(&skt->dev, "user eject request\n"); |
1da177e4 | 854 | |
7fe908dd | 855 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
856 | do { |
857 | if (!(skt->state & SOCKET_PRESENT)) { | |
858 | ret = -ENODEV; | |
859 | break; | |
860 | } | |
861 | ||
862 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
863 | if (ret != 0) { | |
864 | ret = -EINVAL; | |
865 | break; | |
866 | } | |
867 | ||
868 | socket_remove(skt); | |
869 | ret = 0; | |
870 | } while (0); | |
7fe908dd | 871 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
872 | |
873 | return ret; | |
874 | } /* eject_card */ | |
33519ddd DB |
875 | EXPORT_SYMBOL(pcmcia_eject_card); |
876 | ||
1da177e4 LT |
877 | |
878 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
879 | { | |
880 | int ret; | |
881 | ||
d50dbec3 | 882 | dev_dbg(&skt->dev, "user insert request\n"); |
1da177e4 | 883 | |
7fe908dd | 884 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
885 | do { |
886 | if (skt->state & SOCKET_PRESENT) { | |
887 | ret = -EBUSY; | |
888 | break; | |
889 | } | |
3939c1ef | 890 | if (socket_insert(skt) == -ENODEV) { |
1da177e4 LT |
891 | ret = -ENODEV; |
892 | break; | |
893 | } | |
894 | ret = 0; | |
895 | } while (0); | |
7fe908dd | 896 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
897 | |
898 | return ret; | |
899 | } /* insert_card */ | |
33519ddd DB |
900 | EXPORT_SYMBOL(pcmcia_insert_card); |
901 | ||
1da177e4 | 902 | |
7eff2e7a KS |
903 | static int pcmcia_socket_uevent(struct device *dev, |
904 | struct kobj_uevent_env *env) | |
3ee13937 DB |
905 | { |
906 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 907 | |
7eff2e7a | 908 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
909 | return -ENOMEM; |
910 | ||
3ee13937 DB |
911 | return 0; |
912 | } | |
913 | ||
1da177e4 | 914 | |
378a33a6 DB |
915 | static struct completion pcmcia_unload; |
916 | ||
917 | static void pcmcia_release_socket_class(struct class *data) | |
918 | { | |
919 | complete(&pcmcia_unload); | |
920 | } | |
921 | ||
922 | ||
1da177e4 LT |
923 | struct class pcmcia_socket_class = { |
924 | .name = "pcmcia_socket", | |
87373318 GKH |
925 | .dev_uevent = pcmcia_socket_uevent, |
926 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 927 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
928 | }; |
929 | EXPORT_SYMBOL(pcmcia_socket_class); | |
930 | ||
931 | ||
932 | static int __init init_pcmcia_cs(void) | |
933 | { | |
378a33a6 | 934 | init_completion(&pcmcia_unload); |
4356d73d | 935 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
936 | } |
937 | ||
938 | static void __exit exit_pcmcia_cs(void) | |
939 | { | |
33519ddd | 940 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 941 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
942 | } |
943 | ||
944 | subsys_initcall(init_pcmcia_cs); | |
945 | module_exit(exit_pcmcia_cs); | |
946 |