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/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
1da177e4 | 35 | #include <pcmcia/ss.h> |
1da177e4 LT |
36 | #include <pcmcia/cistpl.h> |
37 | #include <pcmcia/cisreg.h> | |
38 | #include <pcmcia/ds.h> | |
39 | #include "cs_internal.h" | |
40 | ||
1da177e4 LT |
41 | |
42 | /* Module parameters */ | |
43 | ||
44 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 45 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
46 | MODULE_LICENSE("GPL"); |
47 | ||
48 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
49 | ||
50 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
51 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
52 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
53 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
54 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
55 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
56 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
57 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
58 | ||
59 | /* Access speed for attribute memory windows */ | |
60 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
61 | ||
1da177e4 LT |
62 | |
63 | socket_state_t dead_socket = { | |
64 | .csc_mask = SS_DETECT, | |
65 | }; | |
33519ddd | 66 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
67 | |
68 | ||
69 | /* List of all sockets, protected by a rwsem */ | |
70 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 71 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 72 | |
33519ddd DB |
73 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
74 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 75 | |
1da177e4 | 76 | |
9fea84f4 | 77 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 78 | { |
87373318 GKH |
79 | struct device *dev = get_device(&skt->dev); |
80 | if (!dev) | |
1da177e4 | 81 | return NULL; |
593f010b | 82 | return dev_get_drvdata(dev); |
1da177e4 LT |
83 | } |
84 | EXPORT_SYMBOL(pcmcia_get_socket); | |
85 | ||
86 | ||
87 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
88 | { | |
87373318 | 89 | put_device(&skt->dev); |
1da177e4 LT |
90 | } |
91 | EXPORT_SYMBOL(pcmcia_put_socket); | |
92 | ||
93 | ||
87373318 | 94 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 95 | { |
87373318 | 96 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
97 | |
98 | complete(&socket->socket_released); | |
99 | } | |
100 | ||
101 | static int pccardd(void *__skt); | |
102 | ||
103 | /** | |
104 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 105 | * @socket: the &socket to register |
1da177e4 LT |
106 | */ |
107 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
108 | { | |
1da9ab73 | 109 | struct task_struct *tsk; |
1da177e4 LT |
110 | int ret; |
111 | ||
87373318 | 112 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
113 | return -EINVAL; |
114 | ||
d50dbec3 | 115 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 116 | |
1da177e4 | 117 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
118 | * register more than 2^sizeof(unsigned int) pcmcia |
119 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
120 | * anyways, so I don't care] */ |
121 | down_write(&pcmcia_socket_list_rwsem); | |
122 | if (list_empty(&pcmcia_socket_list)) | |
123 | socket->sock = 0; | |
124 | else { | |
125 | unsigned int found, i = 1; | |
126 | struct pcmcia_socket *tmp; | |
127 | do { | |
128 | found = 1; | |
129 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
130 | if (tmp->sock == i) | |
131 | found = 0; | |
132 | } | |
133 | i++; | |
134 | } while (!found); | |
135 | socket->sock = i - 1; | |
136 | } | |
137 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
138 | up_write(&pcmcia_socket_list_rwsem); | |
139 | ||
5bc6b68a RK |
140 | #ifndef CONFIG_CARDBUS |
141 | /* | |
142 | * If we do not support Cardbus, ensure that | |
143 | * the Cardbus socket capability is disabled. | |
144 | */ | |
145 | socket->features &= ~SS_CAP_CARDBUS; | |
146 | #endif | |
1da177e4 LT |
147 | |
148 | /* set proper values in socket->dev */ | |
87373318 | 149 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 150 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 151 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
152 | |
153 | /* base address = 0, map = 0 */ | |
154 | socket->cis_mem.flags = 0; | |
155 | socket->cis_mem.speed = cis_speed; | |
156 | ||
157 | INIT_LIST_HEAD(&socket->cis_cache); | |
158 | ||
159 | init_completion(&socket->socket_released); | |
160 | init_completion(&socket->thread_done); | |
7fe908dd | 161 | mutex_init(&socket->skt_mutex); |
6b8e087b | 162 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
163 | spin_lock_init(&socket->thread_lock); |
164 | ||
b1769450 | 165 | if (socket->resource_ops->init) { |
cfe5d809 | 166 | mutex_lock(&socket->ops_mutex); |
b1769450 | 167 | ret = socket->resource_ops->init(socket); |
cfe5d809 | 168 | mutex_unlock(&socket->ops_mutex); |
b1769450 DB |
169 | if (ret) |
170 | goto err; | |
171 | } | |
172 | ||
1da9ab73 SH |
173 | tsk = kthread_run(pccardd, socket, "pccardd"); |
174 | if (IS_ERR(tsk)) { | |
175 | ret = PTR_ERR(tsk); | |
1da177e4 | 176 | goto err; |
1da9ab73 | 177 | } |
1da177e4 LT |
178 | |
179 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 180 | if (!socket->thread) { |
2e55bf6b DB |
181 | dev_printk(KERN_WARNING, &socket->dev, |
182 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
183 | return -EIO; |
184 | } | |
1da9ab73 | 185 | |
1da177e4 LT |
186 | pcmcia_parse_events(socket, SS_DETECT); |
187 | ||
638bba55 DB |
188 | /* |
189 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
190 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
191 | * support to offer, so this is not a failure mode. | |
192 | */ | |
193 | request_module_nowait("pcmcia"); | |
194 | ||
1da177e4 LT |
195 | return 0; |
196 | ||
197 | err: | |
198 | down_write(&pcmcia_socket_list_rwsem); | |
199 | list_del(&socket->socket_list); | |
200 | up_write(&pcmcia_socket_list_rwsem); | |
201 | return ret; | |
202 | } /* pcmcia_register_socket */ | |
203 | EXPORT_SYMBOL(pcmcia_register_socket); | |
204 | ||
205 | ||
206 | /** | |
207 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 208 | * @socket: the &socket to unregister |
1da177e4 LT |
209 | */ |
210 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
211 | { | |
212 | if (!socket) | |
213 | return; | |
214 | ||
d50dbec3 | 215 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 216 | |
0b402094 | 217 | if (socket->thread) |
1da9ab73 | 218 | kthread_stop(socket->thread); |
0b402094 | 219 | |
1da177e4 LT |
220 | /* remove from our own list */ |
221 | down_write(&pcmcia_socket_list_rwsem); | |
222 | list_del(&socket->socket_list); | |
223 | up_write(&pcmcia_socket_list_rwsem); | |
224 | ||
225 | /* wait for sysfs to drop all references */ | |
cfe5d809 DB |
226 | if (socket->resource_ops->exit) { |
227 | mutex_lock(&socket->ops_mutex); | |
385ee871 | 228 | socket->resource_ops->exit(socket); |
cfe5d809 DB |
229 | mutex_unlock(&socket->ops_mutex); |
230 | } | |
1da177e4 LT |
231 | wait_for_completion(&socket->socket_released); |
232 | } /* pcmcia_unregister_socket */ | |
233 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
234 | ||
235 | ||
9fea84f4 | 236 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
237 | { |
238 | struct pcmcia_socket *s; | |
239 | ||
240 | down_read(&pcmcia_socket_list_rwsem); | |
241 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
242 | if (s->sock == nr) { | |
243 | up_read(&pcmcia_socket_list_rwsem); | |
244 | return s; | |
245 | } | |
246 | up_read(&pcmcia_socket_list_rwsem); | |
247 | ||
248 | return NULL; | |
249 | ||
250 | } | |
251 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
252 | ||
1da177e4 LT |
253 | static int socket_reset(struct pcmcia_socket *skt) |
254 | { | |
255 | int status, i; | |
256 | ||
d50dbec3 | 257 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
258 | |
259 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
260 | skt->ops->set_socket(skt, &skt->socket); | |
261 | udelay((long)reset_time); | |
262 | ||
263 | skt->socket.flags &= ~SS_RESET; | |
264 | skt->ops->set_socket(skt, &skt->socket); | |
265 | ||
266 | msleep(unreset_delay * 10); | |
267 | for (i = 0; i < unreset_limit; i++) { | |
268 | skt->ops->get_status(skt, &status); | |
269 | ||
270 | if (!(status & SS_DETECT)) | |
3939c1ef | 271 | return -ENODEV; |
1da177e4 LT |
272 | |
273 | if (status & SS_READY) | |
4c89e88b | 274 | return 0; |
1da177e4 LT |
275 | |
276 | msleep(unreset_check * 10); | |
277 | } | |
278 | ||
d50dbec3 | 279 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 280 | return -ETIMEDOUT; |
1da177e4 LT |
281 | } |
282 | ||
78187865 | 283 | /* |
6e493882 DR |
284 | * socket_setup() and socket_shutdown() are called by the main event handler |
285 | * when card insertion and removal events are received. | |
286 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
287 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
288 | */ | |
289 | static void socket_shutdown(struct pcmcia_socket *s) | |
290 | { | |
291 | int status; | |
292 | ||
d50dbec3 | 293 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 294 | |
7b24e798 DB |
295 | if (s->callback) |
296 | s->callback->remove(s); | |
9e86749c DB |
297 | |
298 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
299 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
300 | msleep(shutdown_delay * 10); | |
301 | s->state &= SOCKET_INUSE; | |
302 | ||
303 | /* Blank out the socket state */ | |
304 | s->socket = dead_socket; | |
305 | s->ops->init(s); | |
306 | s->ops->set_socket(s, &s->socket); | |
6e493882 | 307 | s->lock_count = 0; |
904e3777 DB |
308 | kfree(s->fake_cis); |
309 | s->fake_cis = NULL; | |
c3bfc96e DB |
310 | s->functions = 0; |
311 | ||
312 | /* From here on we can be sure that only we (that is, the | |
313 | * pccardd thread) accesses this socket, and all (16-bit) | |
314 | * PCMCIA interactions are gone. Therefore, release | |
315 | * ops_mutex so that we don't get a sysfs-related lockdep | |
316 | * warning. | |
317 | */ | |
318 | mutex_unlock(&s->ops_mutex); | |
319 | ||
6e493882 DR |
320 | #ifdef CONFIG_CARDBUS |
321 | cb_free(s); | |
322 | #endif | |
6e493882 | 323 | |
afb2c165 DR |
324 | /* give socket some time to power down */ |
325 | msleep(100); | |
326 | ||
6e493882 DR |
327 | s->ops->get_status(s, &status); |
328 | if (status & SS_POWERON) { | |
2e55bf6b DB |
329 | dev_printk(KERN_ERR, &s->dev, |
330 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
331 | } |
332 | ||
3970dd8c | 333 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
334 | } |
335 | ||
1da177e4 LT |
336 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
337 | { | |
338 | int status, i; | |
339 | ||
d50dbec3 | 340 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
341 | |
342 | skt->ops->get_status(skt, &status); | |
343 | if (!(status & SS_DETECT)) | |
3939c1ef | 344 | return -ENODEV; |
1da177e4 LT |
345 | |
346 | msleep(initial_delay * 10); | |
347 | ||
348 | for (i = 0; i < 100; i++) { | |
349 | skt->ops->get_status(skt, &status); | |
350 | if (!(status & SS_DETECT)) | |
3939c1ef | 351 | return -ENODEV; |
1da177e4 LT |
352 | |
353 | if (!(status & SS_PENDING)) | |
354 | break; | |
355 | ||
356 | msleep(100); | |
357 | } | |
358 | ||
359 | if (status & SS_PENDING) { | |
d50dbec3 DB |
360 | dev_printk(KERN_ERR, &skt->dev, |
361 | "voltage interrogation timed out.\n"); | |
8567142e | 362 | return -ETIMEDOUT; |
1da177e4 LT |
363 | } |
364 | ||
365 | if (status & SS_CARDBUS) { | |
5bc6b68a | 366 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
367 | dev_printk(KERN_ERR, &skt->dev, |
368 | "cardbus cards are not supported.\n"); | |
610e2374 | 369 | return -EINVAL; |
5bc6b68a | 370 | } |
1da177e4 | 371 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
372 | } else |
373 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
374 | |
375 | /* | |
376 | * Decode the card voltage requirements, and apply power to the card. | |
377 | */ | |
378 | if (status & SS_3VCARD) | |
379 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
380 | else if (!(status & SS_XVCARD)) | |
381 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
382 | else { | |
d50dbec3 | 383 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 384 | return -EIO; |
1da177e4 | 385 | } |
fa912bcb DR |
386 | |
387 | if (skt->power_hook) | |
388 | skt->power_hook(skt, HOOK_POWER_PRE); | |
389 | ||
1da177e4 LT |
390 | skt->socket.flags = 0; |
391 | skt->ops->set_socket(skt, &skt->socket); | |
392 | ||
393 | /* | |
394 | * Wait "vcc_settle" for the supply to stabilise. | |
395 | */ | |
396 | msleep(vcc_settle * 10); | |
397 | ||
398 | skt->ops->get_status(skt, &status); | |
399 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 400 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 401 | return -EIO; |
1da177e4 LT |
402 | } |
403 | ||
fa912bcb DR |
404 | status = socket_reset(skt); |
405 | ||
406 | if (skt->power_hook) | |
407 | skt->power_hook(skt, HOOK_POWER_POST); | |
408 | ||
409 | return status; | |
1da177e4 LT |
410 | } |
411 | ||
412 | /* | |
413 | * Handle card insertion. Setup the socket, reset the card, | |
414 | * and then tell the rest of PCMCIA that a card is present. | |
415 | */ | |
416 | static int socket_insert(struct pcmcia_socket *skt) | |
417 | { | |
418 | int ret; | |
419 | ||
d50dbec3 | 420 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 421 | |
9e86749c | 422 | mutex_lock(&skt->ops_mutex); |
f971dbd5 DB |
423 | if (skt->state & SOCKET_INUSE) { |
424 | mutex_unlock(&skt->ops_mutex); | |
425 | return -EINVAL; | |
426 | } | |
3970dd8c | 427 | skt->state |= SOCKET_INUSE; |
1da177e4 LT |
428 | |
429 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 430 | if (ret == 0) { |
1da177e4 | 431 | skt->state |= SOCKET_PRESENT; |
807277cb | 432 | |
2e55bf6b DB |
433 | dev_printk(KERN_NOTICE, &skt->dev, |
434 | "pccard: %s card inserted into slot %d\n", | |
435 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
436 | skt->sock); | |
807277cb | 437 | |
1da177e4 LT |
438 | #ifdef CONFIG_CARDBUS |
439 | if (skt->state & SOCKET_CARDBUS) { | |
440 | cb_alloc(skt); | |
441 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
442 | } | |
443 | #endif | |
d50dbec3 | 444 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 445 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 446 | |
7b24e798 DB |
447 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
448 | skt->callback->add(skt); | |
1da177e4 | 449 | } else { |
9e86749c | 450 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 451 | socket_shutdown(skt); |
1da177e4 LT |
452 | } |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
457 | static int socket_suspend(struct pcmcia_socket *skt) | |
458 | { | |
459 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 460 | return -EBUSY; |
1da177e4 | 461 | |
9e86749c | 462 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
463 | skt->suspended_state = skt->state; |
464 | ||
1da177e4 LT |
465 | skt->socket = dead_socket; |
466 | skt->ops->set_socket(skt, &skt->socket); | |
467 | if (skt->ops->suspend) | |
468 | skt->ops->suspend(skt); | |
469 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 470 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 471 | return 0; |
1da177e4 LT |
472 | } |
473 | ||
9905d1b4 | 474 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 475 | { |
9e86749c | 476 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
477 | skt->socket = dead_socket; |
478 | skt->ops->init(skt); | |
479 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
480 | if (skt->state & SOCKET_PRESENT) |
481 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 482 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
483 | return 0; |
484 | } | |
1da177e4 | 485 | |
9905d1b4 RW |
486 | static int socket_late_resume(struct pcmcia_socket *skt) |
487 | { | |
d7646f76 DB |
488 | int ret; |
489 | ||
9e86749c | 490 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 491 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 492 | mutex_unlock(&skt->ops_mutex); |
88b060d6 | 493 | |
d7646f76 DB |
494 | if (!(skt->state & SOCKET_PRESENT)) { |
495 | ret = socket_insert(skt); | |
496 | if (ret == -ENODEV) | |
497 | ret = 0; | |
498 | return ret; | |
499 | } | |
88b060d6 DB |
500 | |
501 | if (skt->resume_status) { | |
502 | socket_shutdown(skt); | |
503 | return 0; | |
1da177e4 LT |
504 | } |
505 | ||
88b060d6 DB |
506 | if (skt->suspended_state != skt->state) { |
507 | dev_dbg(&skt->dev, | |
508 | "suspend state 0x%x != resume state 0x%x\n", | |
509 | skt->suspended_state, skt->state); | |
510 | ||
1da177e4 | 511 | socket_shutdown(skt); |
88b060d6 | 512 | return socket_insert(skt); |
1da177e4 LT |
513 | } |
514 | ||
88b060d6 DB |
515 | #ifdef CONFIG_CARDBUS |
516 | if (skt->state & SOCKET_CARDBUS) { | |
517 | /* We can't be sure the CardBus card is the same | |
518 | * as the one previously inserted. Therefore, remove | |
519 | * and re-add... */ | |
520 | cb_free(skt); | |
521 | cb_alloc(skt); | |
522 | return 0; | |
523 | } | |
524 | #endif | |
7b24e798 DB |
525 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
526 | skt->callback->early_resume(skt); | |
4c89e88b | 527 | return 0; |
1da177e4 LT |
528 | } |
529 | ||
9905d1b4 RW |
530 | /* |
531 | * Resume a socket. If a card is present, verify its CIS against | |
532 | * our cached copy. If they are different, the card has been | |
533 | * replaced, and we need to tell the drivers. | |
534 | */ | |
535 | static int socket_resume(struct pcmcia_socket *skt) | |
536 | { | |
537 | if (!(skt->state & SOCKET_SUSPEND)) | |
538 | return -EBUSY; | |
539 | ||
540 | socket_early_resume(skt); | |
541 | return socket_late_resume(skt); | |
542 | } | |
543 | ||
1da177e4 LT |
544 | static void socket_remove(struct pcmcia_socket *skt) |
545 | { | |
2e55bf6b DB |
546 | dev_printk(KERN_NOTICE, &skt->dev, |
547 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 548 | socket_shutdown(skt); |
1da177e4 LT |
549 | } |
550 | ||
551 | /* | |
552 | * Process a socket card detect status change. | |
553 | * | |
554 | * If we don't have a card already present, delay the detect event for | |
555 | * about 20ms (to be on the safe side) before reading the socket status. | |
556 | * | |
557 | * Some i82365-based systems send multiple SS_DETECT events during card | |
558 | * insertion, and the "card present" status bit seems to bounce. This | |
559 | * will probably be true with GPIO-based card detection systems after | |
560 | * the product has aged. | |
561 | */ | |
562 | static void socket_detect_change(struct pcmcia_socket *skt) | |
563 | { | |
564 | if (!(skt->state & SOCKET_SUSPEND)) { | |
565 | int status; | |
566 | ||
567 | if (!(skt->state & SOCKET_PRESENT)) | |
568 | msleep(20); | |
569 | ||
570 | skt->ops->get_status(skt, &status); | |
571 | if ((skt->state & SOCKET_PRESENT) && | |
572 | !(status & SS_DETECT)) | |
573 | socket_remove(skt); | |
574 | if (!(skt->state & SOCKET_PRESENT) && | |
575 | (status & SS_DETECT)) | |
576 | socket_insert(skt); | |
577 | } | |
578 | } | |
579 | ||
580 | static int pccardd(void *__skt) | |
581 | { | |
582 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
583 | int ret; |
584 | ||
1da177e4 LT |
585 | skt->thread = current; |
586 | skt->socket = dead_socket; | |
587 | skt->ops->init(skt); | |
588 | skt->ops->set_socket(skt, &skt->socket); | |
589 | ||
590 | /* register with the device core */ | |
87373318 | 591 | ret = device_register(&skt->dev); |
1da177e4 | 592 | if (ret) { |
2e55bf6b DB |
593 | dev_printk(KERN_WARNING, &skt->dev, |
594 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 595 | skt->thread = NULL; |
1da9ab73 SH |
596 | complete(&skt->thread_done); |
597 | return 0; | |
1da177e4 | 598 | } |
4356d73d DB |
599 | ret = pccard_sysfs_add_socket(&skt->dev); |
600 | if (ret) | |
601 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 602 | |
bf4de6f2 DR |
603 | complete(&skt->thread_done); |
604 | ||
d801c140 DB |
605 | /* wait for userspace to catch up */ |
606 | msleep(250); | |
607 | ||
83144186 | 608 | set_freezable(); |
1da177e4 LT |
609 | for (;;) { |
610 | unsigned long flags; | |
611 | unsigned int events; | |
f971dbd5 | 612 | unsigned int sysfs_events; |
1da177e4 LT |
613 | |
614 | set_current_state(TASK_INTERRUPTIBLE); | |
615 | ||
616 | spin_lock_irqsave(&skt->thread_lock, flags); | |
617 | events = skt->thread_events; | |
618 | skt->thread_events = 0; | |
f971dbd5 DB |
619 | sysfs_events = skt->sysfs_events; |
620 | skt->sysfs_events = 0; | |
1da177e4 LT |
621 | spin_unlock_irqrestore(&skt->thread_lock, flags); |
622 | ||
f971dbd5 | 623 | mutex_lock(&skt->skt_mutex); |
216d7cdd DB |
624 | if (events & SS_DETECT) |
625 | socket_detect_change(skt); | |
1da177e4 | 626 | |
f971dbd5 DB |
627 | if (sysfs_events) { |
628 | if (sysfs_events & PCMCIA_UEVENT_EJECT) | |
629 | socket_remove(skt); | |
630 | if (sysfs_events & PCMCIA_UEVENT_INSERT) | |
631 | socket_insert(skt); | |
f971dbd5 DB |
632 | if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && |
633 | !(skt->state & SOCKET_CARDBUS)) { | |
634 | if (skt->callback) | |
635 | ret = skt->callback->suspend(skt); | |
636 | else | |
637 | ret = 0; | |
43821242 | 638 | if (!ret) { |
f971dbd5 | 639 | socket_suspend(skt); |
43821242 DB |
640 | msleep(100); |
641 | } | |
642 | } | |
643 | if ((sysfs_events & PCMCIA_UEVENT_RESUME) && | |
644 | !(skt->state & SOCKET_CARDBUS)) { | |
645 | ret = socket_resume(skt); | |
646 | if (!ret && skt->callback) | |
647 | skt->callback->resume(skt); | |
f971dbd5 | 648 | } |
af461fc1 DB |
649 | if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && |
650 | !(skt->state & SOCKET_CARDBUS)) { | |
651 | if (!ret && skt->callback) | |
652 | skt->callback->requery(skt); | |
653 | } | |
f971dbd5 DB |
654 | } |
655 | mutex_unlock(&skt->skt_mutex); | |
656 | ||
657 | if (events || sysfs_events) | |
658 | continue; | |
659 | ||
1da9ab73 | 660 | if (kthread_should_stop()) |
1da177e4 | 661 | break; |
bf4de6f2 DR |
662 | |
663 | schedule(); | |
664 | try_to_freeze(); | |
1da177e4 | 665 | } |
220ec029 SR |
666 | /* make sure we are running before we exit */ |
667 | set_current_state(TASK_RUNNING); | |
668 | ||
3970dd8c DB |
669 | /* shut down socket, if a device is still present */ |
670 | if (skt->state & SOCKET_PRESENT) { | |
671 | mutex_lock(&skt->skt_mutex); | |
672 | socket_remove(skt); | |
673 | mutex_unlock(&skt->skt_mutex); | |
674 | } | |
675 | ||
1da177e4 | 676 | /* remove from the device core */ |
4356d73d | 677 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 678 | device_unregister(&skt->dev); |
1da177e4 | 679 | |
1da9ab73 | 680 | return 0; |
1da177e4 LT |
681 | } |
682 | ||
683 | /* | |
684 | * Yenta (at least) probes interrupts before registering the socket and | |
685 | * starting the handler thread. | |
686 | */ | |
687 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
688 | { | |
4b7a89a3 | 689 | unsigned long flags; |
d50dbec3 | 690 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 691 | if (s->thread) { |
4b7a89a3 | 692 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 693 | s->thread_events |= events; |
4b7a89a3 | 694 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 695 | |
0b402094 | 696 | wake_up_process(s->thread); |
1da177e4 LT |
697 | } |
698 | } /* pcmcia_parse_events */ | |
33519ddd | 699 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 700 | |
f971dbd5 DB |
701 | /** |
702 | * pcmcia_parse_uevents() - tell pccardd to issue manual commands | |
703 | * @s: the PCMCIA socket we wan't to command | |
704 | * @events: events to pass to pccardd | |
705 | * | |
706 | * userspace-issued insert, eject, suspend and resume commands must be | |
707 | * handled by pccardd to avoid any sysfs-related deadlocks. Valid events | |
708 | * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), | |
af461fc1 DB |
709 | * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) |
710 | * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). | |
f971dbd5 DB |
711 | */ |
712 | void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) | |
713 | { | |
714 | unsigned long flags; | |
715 | dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); | |
716 | if (s->thread) { | |
717 | spin_lock_irqsave(&s->thread_lock, flags); | |
718 | s->sysfs_events |= events; | |
719 | spin_unlock_irqrestore(&s->thread_lock, flags); | |
720 | ||
721 | wake_up_process(s->thread); | |
722 | } | |
723 | } | |
724 | EXPORT_SYMBOL(pcmcia_parse_uevents); | |
725 | ||
1da177e4 LT |
726 | |
727 | /* register pcmcia_callback */ | |
728 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
729 | { | |
9fea84f4 | 730 | int ret = 0; |
1da177e4 | 731 | |
7fe908dd DB |
732 | /* s->skt_mutex also protects s->callback */ |
733 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
734 | |
735 | if (c) { | |
736 | /* registration */ | |
737 | if (s->callback) { | |
738 | ret = -EBUSY; | |
739 | goto err; | |
740 | } | |
741 | ||
742 | s->callback = c; | |
743 | ||
744 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
7b24e798 | 745 | s->callback->add(s); |
1da177e4 LT |
746 | } else |
747 | s->callback = NULL; | |
748 | err: | |
7fe908dd | 749 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
750 | |
751 | return ret; | |
752 | } | |
753 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
754 | ||
1da177e4 | 755 | |
33519ddd DB |
756 | /* I'm not sure which "reset" function this is supposed to use, |
757 | * but for now, it uses the low-level interface's reset, not the | |
758 | * CIS register. | |
759 | */ | |
1da177e4 | 760 | |
994917f8 | 761 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
762 | { |
763 | int ret; | |
33519ddd | 764 | |
d50dbec3 | 765 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 766 | |
7fe908dd | 767 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
768 | do { |
769 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 770 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 771 | ret = -ENODEV; |
1da177e4 LT |
772 | break; |
773 | } | |
774 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 775 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 776 | ret = -EBUSY; |
1da177e4 LT |
777 | break; |
778 | } | |
779 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 780 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 781 | ret = -EPERM; |
1da177e4 LT |
782 | break; |
783 | } | |
784 | ||
216d7cdd DB |
785 | if (skt->callback) |
786 | skt->callback->suspend(skt); | |
787 | mutex_lock(&skt->ops_mutex); | |
788 | ret = socket_reset(skt); | |
789 | mutex_unlock(&skt->ops_mutex); | |
790 | if ((ret == 0) && (skt->callback)) | |
791 | skt->callback->resume(skt); | |
1da177e4 | 792 | |
4c89e88b | 793 | ret = 0; |
1da177e4 | 794 | } while (0); |
7fe908dd | 795 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
796 | |
797 | return ret; | |
798 | } /* reset_card */ | |
994917f8 | 799 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 800 | |
1da177e4 | 801 | |
7eff2e7a KS |
802 | static int pcmcia_socket_uevent(struct device *dev, |
803 | struct kobj_uevent_env *env) | |
3ee13937 DB |
804 | { |
805 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 806 | |
7eff2e7a | 807 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
808 | return -ENOMEM; |
809 | ||
3ee13937 DB |
810 | return 0; |
811 | } | |
812 | ||
1da177e4 | 813 | |
378a33a6 DB |
814 | static struct completion pcmcia_unload; |
815 | ||
816 | static void pcmcia_release_socket_class(struct class *data) | |
817 | { | |
818 | complete(&pcmcia_unload); | |
819 | } | |
820 | ||
821 | ||
d7646f76 DB |
822 | #ifdef CONFIG_PM |
823 | ||
824 | static int __pcmcia_pm_op(struct device *dev, | |
825 | int (*callback) (struct pcmcia_socket *skt)) | |
826 | { | |
827 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
828 | int ret; | |
829 | ||
830 | mutex_lock(&s->skt_mutex); | |
831 | ret = callback(s); | |
832 | mutex_unlock(&s->skt_mutex); | |
833 | ||
834 | return ret; | |
835 | } | |
836 | ||
837 | static int pcmcia_socket_dev_suspend_noirq(struct device *dev) | |
838 | { | |
839 | return __pcmcia_pm_op(dev, socket_suspend); | |
840 | } | |
841 | ||
842 | static int pcmcia_socket_dev_resume_noirq(struct device *dev) | |
843 | { | |
844 | return __pcmcia_pm_op(dev, socket_early_resume); | |
845 | } | |
846 | ||
847 | static int pcmcia_socket_dev_resume(struct device *dev) | |
848 | { | |
849 | return __pcmcia_pm_op(dev, socket_late_resume); | |
850 | } | |
851 | ||
852 | static const struct dev_pm_ops pcmcia_socket_pm_ops = { | |
853 | /* dev_resume may be called with IRQs enabled */ | |
854 | SET_SYSTEM_SLEEP_PM_OPS(NULL, | |
855 | pcmcia_socket_dev_resume) | |
856 | ||
857 | /* late suspend must be called with IRQs disabled */ | |
858 | .suspend_noirq = pcmcia_socket_dev_suspend_noirq, | |
859 | .freeze_noirq = pcmcia_socket_dev_suspend_noirq, | |
860 | .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, | |
861 | ||
862 | /* early resume must be called with IRQs disabled */ | |
863 | .resume_noirq = pcmcia_socket_dev_resume_noirq, | |
864 | .thaw_noirq = pcmcia_socket_dev_resume_noirq, | |
865 | .restore_noirq = pcmcia_socket_dev_resume_noirq, | |
866 | }; | |
867 | ||
868 | #define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) | |
869 | ||
870 | #else /* CONFIG_PM */ | |
871 | ||
872 | #define PCMCIA_SOCKET_CLASS_PM_OPS NULL | |
873 | ||
874 | #endif /* CONFIG_PM */ | |
875 | ||
1da177e4 LT |
876 | struct class pcmcia_socket_class = { |
877 | .name = "pcmcia_socket", | |
87373318 GKH |
878 | .dev_uevent = pcmcia_socket_uevent, |
879 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 880 | .class_release = pcmcia_release_socket_class, |
d7646f76 | 881 | .pm = PCMCIA_SOCKET_CLASS_PM_OPS, |
1da177e4 LT |
882 | }; |
883 | EXPORT_SYMBOL(pcmcia_socket_class); | |
884 | ||
885 | ||
886 | static int __init init_pcmcia_cs(void) | |
887 | { | |
378a33a6 | 888 | init_completion(&pcmcia_unload); |
4356d73d | 889 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
890 | } |
891 | ||
892 | static void __exit exit_pcmcia_cs(void) | |
893 | { | |
33519ddd | 894 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 895 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
896 | } |
897 | ||
898 | subsys_initcall(init_pcmcia_cs); | |
899 | module_exit(exit_pcmcia_cs); | |
900 |