Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
1da177e4 LT |
32 | #include <asm/irq.h> |
33 | ||
1da177e4 | 34 | #include <pcmcia/ss.h> |
1da177e4 LT |
35 | #include <pcmcia/cistpl.h> |
36 | #include <pcmcia/cisreg.h> | |
37 | #include <pcmcia/ds.h> | |
38 | #include "cs_internal.h" | |
39 | ||
1da177e4 LT |
40 | |
41 | /* Module parameters */ | |
42 | ||
43 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 44 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
45 | MODULE_LICENSE("GPL"); |
46 | ||
47 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
48 | ||
49 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
50 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
51 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
52 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
53 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
54 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
55 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
56 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
57 | ||
58 | /* Access speed for attribute memory windows */ | |
59 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
60 | ||
1da177e4 LT |
61 | |
62 | socket_state_t dead_socket = { | |
63 | .csc_mask = SS_DETECT, | |
64 | }; | |
33519ddd | 65 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
66 | |
67 | ||
68 | /* List of all sockets, protected by a rwsem */ | |
69 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 70 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 71 | |
33519ddd DB |
72 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
73 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 74 | |
1da177e4 | 75 | |
9fea84f4 | 76 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 77 | { |
87373318 GKH |
78 | struct device *dev = get_device(&skt->dev); |
79 | if (!dev) | |
1da177e4 | 80 | return NULL; |
593f010b | 81 | return dev_get_drvdata(dev); |
1da177e4 LT |
82 | } |
83 | EXPORT_SYMBOL(pcmcia_get_socket); | |
84 | ||
85 | ||
86 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
87 | { | |
87373318 | 88 | put_device(&skt->dev); |
1da177e4 LT |
89 | } |
90 | EXPORT_SYMBOL(pcmcia_put_socket); | |
91 | ||
92 | ||
87373318 | 93 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 94 | { |
87373318 | 95 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
96 | |
97 | complete(&socket->socket_released); | |
98 | } | |
99 | ||
100 | static int pccardd(void *__skt); | |
101 | ||
102 | /** | |
103 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 104 | * @socket: the &socket to register |
1da177e4 LT |
105 | */ |
106 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
107 | { | |
1da9ab73 | 108 | struct task_struct *tsk; |
1da177e4 LT |
109 | int ret; |
110 | ||
87373318 | 111 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
112 | return -EINVAL; |
113 | ||
d50dbec3 | 114 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 115 | |
1da177e4 | 116 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
117 | * register more than 2^sizeof(unsigned int) pcmcia |
118 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
119 | * anyways, so I don't care] */ |
120 | down_write(&pcmcia_socket_list_rwsem); | |
121 | if (list_empty(&pcmcia_socket_list)) | |
122 | socket->sock = 0; | |
123 | else { | |
124 | unsigned int found, i = 1; | |
125 | struct pcmcia_socket *tmp; | |
126 | do { | |
127 | found = 1; | |
128 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
129 | if (tmp->sock == i) | |
130 | found = 0; | |
131 | } | |
132 | i++; | |
133 | } while (!found); | |
134 | socket->sock = i - 1; | |
135 | } | |
136 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
137 | up_write(&pcmcia_socket_list_rwsem); | |
138 | ||
5bc6b68a RK |
139 | #ifndef CONFIG_CARDBUS |
140 | /* | |
141 | * If we do not support Cardbus, ensure that | |
142 | * the Cardbus socket capability is disabled. | |
143 | */ | |
144 | socket->features &= ~SS_CAP_CARDBUS; | |
145 | #endif | |
1da177e4 LT |
146 | |
147 | /* set proper values in socket->dev */ | |
87373318 | 148 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 149 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 150 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
151 | |
152 | /* base address = 0, map = 0 */ | |
153 | socket->cis_mem.flags = 0; | |
154 | socket->cis_mem.speed = cis_speed; | |
155 | ||
156 | INIT_LIST_HEAD(&socket->cis_cache); | |
157 | ||
158 | init_completion(&socket->socket_released); | |
159 | init_completion(&socket->thread_done); | |
7fe908dd | 160 | mutex_init(&socket->skt_mutex); |
6b8e087b | 161 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
162 | spin_lock_init(&socket->thread_lock); |
163 | ||
b1769450 | 164 | if (socket->resource_ops->init) { |
cfe5d809 | 165 | mutex_lock(&socket->ops_mutex); |
b1769450 | 166 | ret = socket->resource_ops->init(socket); |
cfe5d809 | 167 | mutex_unlock(&socket->ops_mutex); |
b1769450 DB |
168 | if (ret) |
169 | goto err; | |
170 | } | |
171 | ||
1da9ab73 SH |
172 | tsk = kthread_run(pccardd, socket, "pccardd"); |
173 | if (IS_ERR(tsk)) { | |
174 | ret = PTR_ERR(tsk); | |
1da177e4 | 175 | goto err; |
1da9ab73 | 176 | } |
1da177e4 LT |
177 | |
178 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 179 | if (!socket->thread) { |
f2e6cf76 JP |
180 | dev_warn(&socket->dev, |
181 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
182 | return -EIO; |
183 | } | |
1da9ab73 | 184 | |
1da177e4 LT |
185 | pcmcia_parse_events(socket, SS_DETECT); |
186 | ||
638bba55 DB |
187 | /* |
188 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
189 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
190 | * support to offer, so this is not a failure mode. | |
191 | */ | |
192 | request_module_nowait("pcmcia"); | |
193 | ||
1da177e4 LT |
194 | return 0; |
195 | ||
196 | err: | |
197 | down_write(&pcmcia_socket_list_rwsem); | |
198 | list_del(&socket->socket_list); | |
199 | up_write(&pcmcia_socket_list_rwsem); | |
200 | return ret; | |
201 | } /* pcmcia_register_socket */ | |
202 | EXPORT_SYMBOL(pcmcia_register_socket); | |
203 | ||
204 | ||
205 | /** | |
206 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 207 | * @socket: the &socket to unregister |
1da177e4 LT |
208 | */ |
209 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
210 | { | |
211 | if (!socket) | |
212 | return; | |
213 | ||
d50dbec3 | 214 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 215 | |
0b402094 | 216 | if (socket->thread) |
1da9ab73 | 217 | kthread_stop(socket->thread); |
0b402094 | 218 | |
1da177e4 LT |
219 | /* remove from our own list */ |
220 | down_write(&pcmcia_socket_list_rwsem); | |
221 | list_del(&socket->socket_list); | |
222 | up_write(&pcmcia_socket_list_rwsem); | |
223 | ||
224 | /* wait for sysfs to drop all references */ | |
cfe5d809 DB |
225 | if (socket->resource_ops->exit) { |
226 | mutex_lock(&socket->ops_mutex); | |
385ee871 | 227 | socket->resource_ops->exit(socket); |
cfe5d809 DB |
228 | mutex_unlock(&socket->ops_mutex); |
229 | } | |
1da177e4 LT |
230 | wait_for_completion(&socket->socket_released); |
231 | } /* pcmcia_unregister_socket */ | |
232 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
233 | ||
234 | ||
9fea84f4 | 235 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
236 | { |
237 | struct pcmcia_socket *s; | |
238 | ||
239 | down_read(&pcmcia_socket_list_rwsem); | |
240 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
241 | if (s->sock == nr) { | |
242 | up_read(&pcmcia_socket_list_rwsem); | |
243 | return s; | |
244 | } | |
245 | up_read(&pcmcia_socket_list_rwsem); | |
246 | ||
247 | return NULL; | |
248 | ||
249 | } | |
250 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
251 | ||
1da177e4 LT |
252 | static int socket_reset(struct pcmcia_socket *skt) |
253 | { | |
254 | int status, i; | |
255 | ||
d50dbec3 | 256 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
257 | |
258 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
259 | skt->ops->set_socket(skt, &skt->socket); | |
260 | udelay((long)reset_time); | |
261 | ||
262 | skt->socket.flags &= ~SS_RESET; | |
263 | skt->ops->set_socket(skt, &skt->socket); | |
264 | ||
265 | msleep(unreset_delay * 10); | |
266 | for (i = 0; i < unreset_limit; i++) { | |
267 | skt->ops->get_status(skt, &status); | |
268 | ||
269 | if (!(status & SS_DETECT)) | |
3939c1ef | 270 | return -ENODEV; |
1da177e4 LT |
271 | |
272 | if (status & SS_READY) | |
4c89e88b | 273 | return 0; |
1da177e4 LT |
274 | |
275 | msleep(unreset_check * 10); | |
276 | } | |
277 | ||
f2e6cf76 | 278 | dev_err(&skt->dev, "time out after reset\n"); |
8567142e | 279 | return -ETIMEDOUT; |
1da177e4 LT |
280 | } |
281 | ||
78187865 | 282 | /* |
6e493882 DR |
283 | * socket_setup() and socket_shutdown() are called by the main event handler |
284 | * when card insertion and removal events are received. | |
285 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
286 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
287 | */ | |
288 | static void socket_shutdown(struct pcmcia_socket *s) | |
289 | { | |
290 | int status; | |
291 | ||
d50dbec3 | 292 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 293 | |
7b24e798 DB |
294 | if (s->callback) |
295 | s->callback->remove(s); | |
9e86749c DB |
296 | |
297 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
298 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
299 | msleep(shutdown_delay * 10); | |
300 | s->state &= SOCKET_INUSE; | |
301 | ||
302 | /* Blank out the socket state */ | |
303 | s->socket = dead_socket; | |
304 | s->ops->init(s); | |
305 | s->ops->set_socket(s, &s->socket); | |
6e493882 | 306 | s->lock_count = 0; |
904e3777 DB |
307 | kfree(s->fake_cis); |
308 | s->fake_cis = NULL; | |
c3bfc96e DB |
309 | s->functions = 0; |
310 | ||
311 | /* From here on we can be sure that only we (that is, the | |
312 | * pccardd thread) accesses this socket, and all (16-bit) | |
313 | * PCMCIA interactions are gone. Therefore, release | |
314 | * ops_mutex so that we don't get a sysfs-related lockdep | |
315 | * warning. | |
316 | */ | |
317 | mutex_unlock(&s->ops_mutex); | |
318 | ||
6e493882 DR |
319 | #ifdef CONFIG_CARDBUS |
320 | cb_free(s); | |
321 | #endif | |
6e493882 | 322 | |
afb2c165 DR |
323 | /* give socket some time to power down */ |
324 | msleep(100); | |
325 | ||
6e493882 DR |
326 | s->ops->get_status(s, &status); |
327 | if (status & SS_POWERON) { | |
f2e6cf76 JP |
328 | dev_err(&s->dev, |
329 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
330 | } |
331 | ||
3970dd8c | 332 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
333 | } |
334 | ||
1da177e4 LT |
335 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
336 | { | |
337 | int status, i; | |
338 | ||
d50dbec3 | 339 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
340 | |
341 | skt->ops->get_status(skt, &status); | |
342 | if (!(status & SS_DETECT)) | |
3939c1ef | 343 | return -ENODEV; |
1da177e4 LT |
344 | |
345 | msleep(initial_delay * 10); | |
346 | ||
347 | for (i = 0; i < 100; i++) { | |
348 | skt->ops->get_status(skt, &status); | |
349 | if (!(status & SS_DETECT)) | |
3939c1ef | 350 | return -ENODEV; |
1da177e4 LT |
351 | |
352 | if (!(status & SS_PENDING)) | |
353 | break; | |
354 | ||
355 | msleep(100); | |
356 | } | |
357 | ||
358 | if (status & SS_PENDING) { | |
f2e6cf76 | 359 | dev_err(&skt->dev, "voltage interrogation timed out\n"); |
8567142e | 360 | return -ETIMEDOUT; |
1da177e4 LT |
361 | } |
362 | ||
363 | if (status & SS_CARDBUS) { | |
5bc6b68a | 364 | if (!(skt->features & SS_CAP_CARDBUS)) { |
f2e6cf76 | 365 | dev_err(&skt->dev, "cardbus cards are not supported\n"); |
610e2374 | 366 | return -EINVAL; |
5bc6b68a | 367 | } |
1da177e4 | 368 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
369 | } else |
370 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
371 | |
372 | /* | |
373 | * Decode the card voltage requirements, and apply power to the card. | |
374 | */ | |
375 | if (status & SS_3VCARD) | |
376 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
377 | else if (!(status & SS_XVCARD)) | |
378 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
379 | else { | |
f2e6cf76 | 380 | dev_err(&skt->dev, "unsupported voltage key\n"); |
610e2374 | 381 | return -EIO; |
1da177e4 | 382 | } |
fa912bcb DR |
383 | |
384 | if (skt->power_hook) | |
385 | skt->power_hook(skt, HOOK_POWER_PRE); | |
386 | ||
1da177e4 LT |
387 | skt->socket.flags = 0; |
388 | skt->ops->set_socket(skt, &skt->socket); | |
389 | ||
390 | /* | |
391 | * Wait "vcc_settle" for the supply to stabilise. | |
392 | */ | |
393 | msleep(vcc_settle * 10); | |
394 | ||
395 | skt->ops->get_status(skt, &status); | |
396 | if (!(status & SS_POWERON)) { | |
f2e6cf76 | 397 | dev_err(&skt->dev, "unable to apply power\n"); |
610e2374 | 398 | return -EIO; |
1da177e4 LT |
399 | } |
400 | ||
fa912bcb DR |
401 | status = socket_reset(skt); |
402 | ||
403 | if (skt->power_hook) | |
404 | skt->power_hook(skt, HOOK_POWER_POST); | |
405 | ||
406 | return status; | |
1da177e4 LT |
407 | } |
408 | ||
409 | /* | |
410 | * Handle card insertion. Setup the socket, reset the card, | |
411 | * and then tell the rest of PCMCIA that a card is present. | |
412 | */ | |
413 | static int socket_insert(struct pcmcia_socket *skt) | |
414 | { | |
415 | int ret; | |
416 | ||
d50dbec3 | 417 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 418 | |
9e86749c | 419 | mutex_lock(&skt->ops_mutex); |
f971dbd5 DB |
420 | if (skt->state & SOCKET_INUSE) { |
421 | mutex_unlock(&skt->ops_mutex); | |
422 | return -EINVAL; | |
423 | } | |
3970dd8c | 424 | skt->state |= SOCKET_INUSE; |
1da177e4 LT |
425 | |
426 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 427 | if (ret == 0) { |
1da177e4 | 428 | skt->state |= SOCKET_PRESENT; |
807277cb | 429 | |
f2e6cf76 | 430 | dev_notice(&skt->dev, "pccard: %s card inserted into slot %d\n", |
2e55bf6b DB |
431 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", |
432 | skt->sock); | |
807277cb | 433 | |
1da177e4 LT |
434 | #ifdef CONFIG_CARDBUS |
435 | if (skt->state & SOCKET_CARDBUS) { | |
436 | cb_alloc(skt); | |
437 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
438 | } | |
439 | #endif | |
d50dbec3 | 440 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 441 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 442 | |
7b24e798 DB |
443 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
444 | skt->callback->add(skt); | |
1da177e4 | 445 | } else { |
9e86749c | 446 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 447 | socket_shutdown(skt); |
1da177e4 LT |
448 | } |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | static int socket_suspend(struct pcmcia_socket *skt) | |
454 | { | |
455 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 456 | return -EBUSY; |
1da177e4 | 457 | |
9e86749c | 458 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
459 | skt->suspended_state = skt->state; |
460 | ||
1da177e4 LT |
461 | skt->socket = dead_socket; |
462 | skt->ops->set_socket(skt, &skt->socket); | |
463 | if (skt->ops->suspend) | |
464 | skt->ops->suspend(skt); | |
465 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 466 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 467 | return 0; |
1da177e4 LT |
468 | } |
469 | ||
9905d1b4 | 470 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 471 | { |
9e86749c | 472 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
473 | skt->socket = dead_socket; |
474 | skt->ops->init(skt); | |
475 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
476 | if (skt->state & SOCKET_PRESENT) |
477 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 478 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
479 | return 0; |
480 | } | |
1da177e4 | 481 | |
9905d1b4 RW |
482 | static int socket_late_resume(struct pcmcia_socket *skt) |
483 | { | |
42b5dd51 | 484 | int ret = 0; |
d7646f76 | 485 | |
9e86749c | 486 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 487 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 488 | mutex_unlock(&skt->ops_mutex); |
88b060d6 | 489 | |
d7646f76 DB |
490 | if (!(skt->state & SOCKET_PRESENT)) { |
491 | ret = socket_insert(skt); | |
492 | if (ret == -ENODEV) | |
493 | ret = 0; | |
494 | return ret; | |
495 | } | |
88b060d6 DB |
496 | |
497 | if (skt->resume_status) { | |
498 | socket_shutdown(skt); | |
499 | return 0; | |
1da177e4 LT |
500 | } |
501 | ||
88b060d6 DB |
502 | if (skt->suspended_state != skt->state) { |
503 | dev_dbg(&skt->dev, | |
504 | "suspend state 0x%x != resume state 0x%x\n", | |
505 | skt->suspended_state, skt->state); | |
506 | ||
1da177e4 | 507 | socket_shutdown(skt); |
88b060d6 | 508 | return socket_insert(skt); |
1da177e4 LT |
509 | } |
510 | ||
42b5dd51 CL |
511 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
512 | ret = skt->callback->early_resume(skt); | |
513 | return ret; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Finalize the resume. In case of a cardbus socket, we have | |
518 | * to rebind the devices as we can't be certain that it has been | |
519 | * replaced, or not. | |
520 | */ | |
521 | static int socket_complete_resume(struct pcmcia_socket *skt) | |
522 | { | |
523 | int ret = 0; | |
88b060d6 DB |
524 | #ifdef CONFIG_CARDBUS |
525 | if (skt->state & SOCKET_CARDBUS) { | |
526 | /* We can't be sure the CardBus card is the same | |
527 | * as the one previously inserted. Therefore, remove | |
528 | * and re-add... */ | |
529 | cb_free(skt); | |
42b5dd51 CL |
530 | ret = cb_alloc(skt); |
531 | if (ret) | |
532 | cb_free(skt); | |
88b060d6 DB |
533 | } |
534 | #endif | |
42b5dd51 | 535 | return ret; |
1da177e4 LT |
536 | } |
537 | ||
9905d1b4 RW |
538 | /* |
539 | * Resume a socket. If a card is present, verify its CIS against | |
540 | * our cached copy. If they are different, the card has been | |
541 | * replaced, and we need to tell the drivers. | |
542 | */ | |
543 | static int socket_resume(struct pcmcia_socket *skt) | |
544 | { | |
42b5dd51 | 545 | int err; |
9905d1b4 RW |
546 | if (!(skt->state & SOCKET_SUSPEND)) |
547 | return -EBUSY; | |
548 | ||
549 | socket_early_resume(skt); | |
42b5dd51 CL |
550 | err = socket_late_resume(skt); |
551 | if (!err) | |
552 | err = socket_complete_resume(skt); | |
553 | return err; | |
9905d1b4 RW |
554 | } |
555 | ||
1da177e4 LT |
556 | static void socket_remove(struct pcmcia_socket *skt) |
557 | { | |
f2e6cf76 | 558 | dev_notice(&skt->dev, "pccard: card ejected from slot %d\n", skt->sock); |
1da177e4 | 559 | socket_shutdown(skt); |
1da177e4 LT |
560 | } |
561 | ||
562 | /* | |
563 | * Process a socket card detect status change. | |
564 | * | |
565 | * If we don't have a card already present, delay the detect event for | |
566 | * about 20ms (to be on the safe side) before reading the socket status. | |
567 | * | |
568 | * Some i82365-based systems send multiple SS_DETECT events during card | |
569 | * insertion, and the "card present" status bit seems to bounce. This | |
570 | * will probably be true with GPIO-based card detection systems after | |
571 | * the product has aged. | |
572 | */ | |
573 | static void socket_detect_change(struct pcmcia_socket *skt) | |
574 | { | |
575 | if (!(skt->state & SOCKET_SUSPEND)) { | |
576 | int status; | |
577 | ||
578 | if (!(skt->state & SOCKET_PRESENT)) | |
579 | msleep(20); | |
580 | ||
581 | skt->ops->get_status(skt, &status); | |
582 | if ((skt->state & SOCKET_PRESENT) && | |
583 | !(status & SS_DETECT)) | |
584 | socket_remove(skt); | |
585 | if (!(skt->state & SOCKET_PRESENT) && | |
586 | (status & SS_DETECT)) | |
587 | socket_insert(skt); | |
588 | } | |
589 | } | |
590 | ||
591 | static int pccardd(void *__skt) | |
592 | { | |
593 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
594 | int ret; |
595 | ||
1da177e4 LT |
596 | skt->thread = current; |
597 | skt->socket = dead_socket; | |
598 | skt->ops->init(skt); | |
599 | skt->ops->set_socket(skt, &skt->socket); | |
600 | ||
601 | /* register with the device core */ | |
87373318 | 602 | ret = device_register(&skt->dev); |
1da177e4 | 603 | if (ret) { |
f2e6cf76 | 604 | dev_warn(&skt->dev, "PCMCIA: unable to register socket\n"); |
1da177e4 | 605 | skt->thread = NULL; |
1da9ab73 SH |
606 | complete(&skt->thread_done); |
607 | return 0; | |
1da177e4 | 608 | } |
4356d73d DB |
609 | ret = pccard_sysfs_add_socket(&skt->dev); |
610 | if (ret) | |
611 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 612 | |
bf4de6f2 DR |
613 | complete(&skt->thread_done); |
614 | ||
d801c140 DB |
615 | /* wait for userspace to catch up */ |
616 | msleep(250); | |
617 | ||
83144186 | 618 | set_freezable(); |
1da177e4 LT |
619 | for (;;) { |
620 | unsigned long flags; | |
621 | unsigned int events; | |
f971dbd5 | 622 | unsigned int sysfs_events; |
1da177e4 | 623 | |
1da177e4 LT |
624 | spin_lock_irqsave(&skt->thread_lock, flags); |
625 | events = skt->thread_events; | |
626 | skt->thread_events = 0; | |
f971dbd5 DB |
627 | sysfs_events = skt->sysfs_events; |
628 | skt->sysfs_events = 0; | |
1da177e4 LT |
629 | spin_unlock_irqrestore(&skt->thread_lock, flags); |
630 | ||
f971dbd5 | 631 | mutex_lock(&skt->skt_mutex); |
216d7cdd DB |
632 | if (events & SS_DETECT) |
633 | socket_detect_change(skt); | |
1da177e4 | 634 | |
f971dbd5 DB |
635 | if (sysfs_events) { |
636 | if (sysfs_events & PCMCIA_UEVENT_EJECT) | |
637 | socket_remove(skt); | |
638 | if (sysfs_events & PCMCIA_UEVENT_INSERT) | |
639 | socket_insert(skt); | |
f971dbd5 DB |
640 | if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && |
641 | !(skt->state & SOCKET_CARDBUS)) { | |
642 | if (skt->callback) | |
643 | ret = skt->callback->suspend(skt); | |
644 | else | |
645 | ret = 0; | |
43821242 | 646 | if (!ret) { |
f971dbd5 | 647 | socket_suspend(skt); |
43821242 DB |
648 | msleep(100); |
649 | } | |
650 | } | |
651 | if ((sysfs_events & PCMCIA_UEVENT_RESUME) && | |
652 | !(skt->state & SOCKET_CARDBUS)) { | |
653 | ret = socket_resume(skt); | |
654 | if (!ret && skt->callback) | |
655 | skt->callback->resume(skt); | |
f971dbd5 | 656 | } |
af461fc1 DB |
657 | if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && |
658 | !(skt->state & SOCKET_CARDBUS)) { | |
659 | if (!ret && skt->callback) | |
660 | skt->callback->requery(skt); | |
661 | } | |
f971dbd5 DB |
662 | } |
663 | mutex_unlock(&skt->skt_mutex); | |
664 | ||
665 | if (events || sysfs_events) | |
666 | continue; | |
667 | ||
1da9ab73 | 668 | if (kthread_should_stop()) |
1da177e4 | 669 | break; |
bf4de6f2 | 670 | |
d3046ba8 DES |
671 | set_current_state(TASK_INTERRUPTIBLE); |
672 | ||
bf4de6f2 | 673 | schedule(); |
d3046ba8 DES |
674 | |
675 | /* make sure we are running */ | |
676 | __set_current_state(TASK_RUNNING); | |
677 | ||
bf4de6f2 | 678 | try_to_freeze(); |
1da177e4 | 679 | } |
220ec029 | 680 | |
3970dd8c DB |
681 | /* shut down socket, if a device is still present */ |
682 | if (skt->state & SOCKET_PRESENT) { | |
683 | mutex_lock(&skt->skt_mutex); | |
684 | socket_remove(skt); | |
685 | mutex_unlock(&skt->skt_mutex); | |
686 | } | |
687 | ||
1da177e4 | 688 | /* remove from the device core */ |
4356d73d | 689 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 690 | device_unregister(&skt->dev); |
1da177e4 | 691 | |
1da9ab73 | 692 | return 0; |
1da177e4 LT |
693 | } |
694 | ||
695 | /* | |
696 | * Yenta (at least) probes interrupts before registering the socket and | |
697 | * starting the handler thread. | |
698 | */ | |
699 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
700 | { | |
4b7a89a3 | 701 | unsigned long flags; |
d50dbec3 | 702 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 703 | if (s->thread) { |
4b7a89a3 | 704 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 705 | s->thread_events |= events; |
4b7a89a3 | 706 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 707 | |
0b402094 | 708 | wake_up_process(s->thread); |
1da177e4 LT |
709 | } |
710 | } /* pcmcia_parse_events */ | |
33519ddd | 711 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 712 | |
f971dbd5 DB |
713 | /** |
714 | * pcmcia_parse_uevents() - tell pccardd to issue manual commands | |
715 | * @s: the PCMCIA socket we wan't to command | |
716 | * @events: events to pass to pccardd | |
717 | * | |
718 | * userspace-issued insert, eject, suspend and resume commands must be | |
719 | * handled by pccardd to avoid any sysfs-related deadlocks. Valid events | |
720 | * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), | |
af461fc1 DB |
721 | * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) |
722 | * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). | |
f971dbd5 DB |
723 | */ |
724 | void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) | |
725 | { | |
726 | unsigned long flags; | |
727 | dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); | |
728 | if (s->thread) { | |
729 | spin_lock_irqsave(&s->thread_lock, flags); | |
730 | s->sysfs_events |= events; | |
731 | spin_unlock_irqrestore(&s->thread_lock, flags); | |
732 | ||
733 | wake_up_process(s->thread); | |
734 | } | |
735 | } | |
736 | EXPORT_SYMBOL(pcmcia_parse_uevents); | |
737 | ||
1da177e4 LT |
738 | |
739 | /* register pcmcia_callback */ | |
740 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
741 | { | |
9fea84f4 | 742 | int ret = 0; |
1da177e4 | 743 | |
7fe908dd DB |
744 | /* s->skt_mutex also protects s->callback */ |
745 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
746 | |
747 | if (c) { | |
748 | /* registration */ | |
749 | if (s->callback) { | |
750 | ret = -EBUSY; | |
751 | goto err; | |
752 | } | |
753 | ||
754 | s->callback = c; | |
755 | ||
756 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
7b24e798 | 757 | s->callback->add(s); |
1da177e4 LT |
758 | } else |
759 | s->callback = NULL; | |
760 | err: | |
7fe908dd | 761 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
762 | |
763 | return ret; | |
764 | } | |
765 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
766 | ||
1da177e4 | 767 | |
33519ddd DB |
768 | /* I'm not sure which "reset" function this is supposed to use, |
769 | * but for now, it uses the low-level interface's reset, not the | |
770 | * CIS register. | |
771 | */ | |
1da177e4 | 772 | |
994917f8 | 773 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
774 | { |
775 | int ret; | |
33519ddd | 776 | |
d50dbec3 | 777 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 778 | |
7fe908dd | 779 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
780 | do { |
781 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 782 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 783 | ret = -ENODEV; |
1da177e4 LT |
784 | break; |
785 | } | |
786 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 787 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 788 | ret = -EBUSY; |
1da177e4 LT |
789 | break; |
790 | } | |
791 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 792 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 793 | ret = -EPERM; |
1da177e4 LT |
794 | break; |
795 | } | |
796 | ||
216d7cdd DB |
797 | if (skt->callback) |
798 | skt->callback->suspend(skt); | |
799 | mutex_lock(&skt->ops_mutex); | |
800 | ret = socket_reset(skt); | |
801 | mutex_unlock(&skt->ops_mutex); | |
802 | if ((ret == 0) && (skt->callback)) | |
803 | skt->callback->resume(skt); | |
1da177e4 | 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 | |
7eff2e7a KS |
814 | static int pcmcia_socket_uevent(struct device *dev, |
815 | struct kobj_uevent_env *env) | |
3ee13937 DB |
816 | { |
817 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 818 | |
7eff2e7a | 819 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
820 | return -ENOMEM; |
821 | ||
3ee13937 DB |
822 | return 0; |
823 | } | |
824 | ||
1da177e4 | 825 | |
378a33a6 DB |
826 | static struct completion pcmcia_unload; |
827 | ||
828 | static void pcmcia_release_socket_class(struct class *data) | |
829 | { | |
830 | complete(&pcmcia_unload); | |
831 | } | |
832 | ||
833 | ||
d7646f76 DB |
834 | #ifdef CONFIG_PM |
835 | ||
836 | static int __pcmcia_pm_op(struct device *dev, | |
837 | int (*callback) (struct pcmcia_socket *skt)) | |
838 | { | |
839 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
840 | int ret; | |
841 | ||
842 | mutex_lock(&s->skt_mutex); | |
843 | ret = callback(s); | |
844 | mutex_unlock(&s->skt_mutex); | |
845 | ||
846 | return ret; | |
847 | } | |
848 | ||
849 | static int pcmcia_socket_dev_suspend_noirq(struct device *dev) | |
850 | { | |
851 | return __pcmcia_pm_op(dev, socket_suspend); | |
852 | } | |
853 | ||
854 | static int pcmcia_socket_dev_resume_noirq(struct device *dev) | |
855 | { | |
856 | return __pcmcia_pm_op(dev, socket_early_resume); | |
857 | } | |
858 | ||
3c7d2b76 | 859 | static int __used pcmcia_socket_dev_resume(struct device *dev) |
d7646f76 DB |
860 | { |
861 | return __pcmcia_pm_op(dev, socket_late_resume); | |
862 | } | |
863 | ||
42b5dd51 CL |
864 | static void __used pcmcia_socket_dev_complete(struct device *dev) |
865 | { | |
866 | WARN(__pcmcia_pm_op(dev, socket_complete_resume), | |
867 | "failed to complete resume"); | |
868 | } | |
869 | ||
d7646f76 DB |
870 | static const struct dev_pm_ops pcmcia_socket_pm_ops = { |
871 | /* dev_resume may be called with IRQs enabled */ | |
872 | SET_SYSTEM_SLEEP_PM_OPS(NULL, | |
873 | pcmcia_socket_dev_resume) | |
874 | ||
875 | /* late suspend must be called with IRQs disabled */ | |
876 | .suspend_noirq = pcmcia_socket_dev_suspend_noirq, | |
877 | .freeze_noirq = pcmcia_socket_dev_suspend_noirq, | |
878 | .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, | |
879 | ||
880 | /* early resume must be called with IRQs disabled */ | |
881 | .resume_noirq = pcmcia_socket_dev_resume_noirq, | |
882 | .thaw_noirq = pcmcia_socket_dev_resume_noirq, | |
883 | .restore_noirq = pcmcia_socket_dev_resume_noirq, | |
42b5dd51 | 884 | .complete = pcmcia_socket_dev_complete, |
d7646f76 DB |
885 | }; |
886 | ||
887 | #define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) | |
888 | ||
889 | #else /* CONFIG_PM */ | |
890 | ||
891 | #define PCMCIA_SOCKET_CLASS_PM_OPS NULL | |
892 | ||
893 | #endif /* CONFIG_PM */ | |
894 | ||
1da177e4 LT |
895 | struct class pcmcia_socket_class = { |
896 | .name = "pcmcia_socket", | |
87373318 GKH |
897 | .dev_uevent = pcmcia_socket_uevent, |
898 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 899 | .class_release = pcmcia_release_socket_class, |
d7646f76 | 900 | .pm = PCMCIA_SOCKET_CLASS_PM_OPS, |
1da177e4 LT |
901 | }; |
902 | EXPORT_SYMBOL(pcmcia_socket_class); | |
903 | ||
904 | ||
905 | static int __init init_pcmcia_cs(void) | |
906 | { | |
378a33a6 | 907 | init_completion(&pcmcia_unload); |
4356d73d | 908 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
909 | } |
910 | ||
911 | static void __exit exit_pcmcia_cs(void) | |
912 | { | |
33519ddd | 913 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 914 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
915 | } |
916 | ||
917 | subsys_initcall(init_pcmcia_cs); | |
918 | module_exit(exit_pcmcia_cs); | |
919 |