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 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 | |
9fea84f4 | 79 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 80 | { |
87373318 GKH |
81 | struct device *dev = get_device(&skt->dev); |
82 | if (!dev) | |
1da177e4 | 83 | return NULL; |
593f010b | 84 | return dev_get_drvdata(dev); |
1da177e4 LT |
85 | } |
86 | EXPORT_SYMBOL(pcmcia_get_socket); | |
87 | ||
88 | ||
89 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
90 | { | |
87373318 | 91 | put_device(&skt->dev); |
1da177e4 LT |
92 | } |
93 | EXPORT_SYMBOL(pcmcia_put_socket); | |
94 | ||
95 | ||
87373318 | 96 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 97 | { |
87373318 | 98 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
99 | |
100 | complete(&socket->socket_released); | |
101 | } | |
102 | ||
103 | static int pccardd(void *__skt); | |
104 | ||
105 | /** | |
106 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 107 | * @socket: the &socket to register |
1da177e4 LT |
108 | */ |
109 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
110 | { | |
1da9ab73 | 111 | struct task_struct *tsk; |
1da177e4 LT |
112 | int ret; |
113 | ||
87373318 | 114 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
115 | return -EINVAL; |
116 | ||
d50dbec3 | 117 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 118 | |
1da177e4 | 119 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
120 | * register more than 2^sizeof(unsigned int) pcmcia |
121 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
122 | * anyways, so I don't care] */ |
123 | down_write(&pcmcia_socket_list_rwsem); | |
124 | if (list_empty(&pcmcia_socket_list)) | |
125 | socket->sock = 0; | |
126 | else { | |
127 | unsigned int found, i = 1; | |
128 | struct pcmcia_socket *tmp; | |
129 | do { | |
130 | found = 1; | |
131 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
132 | if (tmp->sock == i) | |
133 | found = 0; | |
134 | } | |
135 | i++; | |
136 | } while (!found); | |
137 | socket->sock = i - 1; | |
138 | } | |
139 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
140 | up_write(&pcmcia_socket_list_rwsem); | |
141 | ||
5bc6b68a RK |
142 | #ifndef CONFIG_CARDBUS |
143 | /* | |
144 | * If we do not support Cardbus, ensure that | |
145 | * the Cardbus socket capability is disabled. | |
146 | */ | |
147 | socket->features &= ~SS_CAP_CARDBUS; | |
148 | #endif | |
1da177e4 LT |
149 | |
150 | /* set proper values in socket->dev */ | |
87373318 | 151 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 152 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 153 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
154 | |
155 | /* base address = 0, map = 0 */ | |
156 | socket->cis_mem.flags = 0; | |
157 | socket->cis_mem.speed = cis_speed; | |
158 | ||
159 | INIT_LIST_HEAD(&socket->cis_cache); | |
160 | ||
161 | init_completion(&socket->socket_released); | |
162 | init_completion(&socket->thread_done); | |
7fe908dd | 163 | mutex_init(&socket->skt_mutex); |
6b8e087b | 164 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
165 | spin_lock_init(&socket->thread_lock); |
166 | ||
b1769450 | 167 | if (socket->resource_ops->init) { |
cfe5d809 | 168 | mutex_lock(&socket->ops_mutex); |
b1769450 | 169 | ret = socket->resource_ops->init(socket); |
cfe5d809 | 170 | mutex_unlock(&socket->ops_mutex); |
b1769450 DB |
171 | if (ret) |
172 | goto err; | |
173 | } | |
174 | ||
1da9ab73 SH |
175 | tsk = kthread_run(pccardd, socket, "pccardd"); |
176 | if (IS_ERR(tsk)) { | |
177 | ret = PTR_ERR(tsk); | |
1da177e4 | 178 | goto err; |
1da9ab73 | 179 | } |
1da177e4 LT |
180 | |
181 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 182 | if (!socket->thread) { |
2e55bf6b DB |
183 | dev_printk(KERN_WARNING, &socket->dev, |
184 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
185 | return -EIO; |
186 | } | |
1da9ab73 | 187 | |
1da177e4 LT |
188 | pcmcia_parse_events(socket, SS_DETECT); |
189 | ||
638bba55 DB |
190 | /* |
191 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
192 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
193 | * support to offer, so this is not a failure mode. | |
194 | */ | |
195 | request_module_nowait("pcmcia"); | |
196 | ||
1da177e4 LT |
197 | return 0; |
198 | ||
199 | err: | |
200 | down_write(&pcmcia_socket_list_rwsem); | |
201 | list_del(&socket->socket_list); | |
202 | up_write(&pcmcia_socket_list_rwsem); | |
203 | return ret; | |
204 | } /* pcmcia_register_socket */ | |
205 | EXPORT_SYMBOL(pcmcia_register_socket); | |
206 | ||
207 | ||
208 | /** | |
209 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 210 | * @socket: the &socket to unregister |
1da177e4 LT |
211 | */ |
212 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
213 | { | |
214 | if (!socket) | |
215 | return; | |
216 | ||
d50dbec3 | 217 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 218 | |
0b402094 | 219 | if (socket->thread) |
1da9ab73 | 220 | kthread_stop(socket->thread); |
0b402094 | 221 | |
1da177e4 LT |
222 | /* remove from our own list */ |
223 | down_write(&pcmcia_socket_list_rwsem); | |
224 | list_del(&socket->socket_list); | |
225 | up_write(&pcmcia_socket_list_rwsem); | |
226 | ||
227 | /* wait for sysfs to drop all references */ | |
cfe5d809 DB |
228 | if (socket->resource_ops->exit) { |
229 | mutex_lock(&socket->ops_mutex); | |
385ee871 | 230 | socket->resource_ops->exit(socket); |
cfe5d809 DB |
231 | mutex_unlock(&socket->ops_mutex); |
232 | } | |
1da177e4 LT |
233 | wait_for_completion(&socket->socket_released); |
234 | } /* pcmcia_unregister_socket */ | |
235 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
236 | ||
237 | ||
9fea84f4 | 238 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
239 | { |
240 | struct pcmcia_socket *s; | |
241 | ||
242 | down_read(&pcmcia_socket_list_rwsem); | |
243 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
244 | if (s->sock == nr) { | |
245 | up_read(&pcmcia_socket_list_rwsem); | |
246 | return s; | |
247 | } | |
248 | up_read(&pcmcia_socket_list_rwsem); | |
249 | ||
250 | return NULL; | |
251 | ||
252 | } | |
253 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
254 | ||
78187865 | 255 | /* |
33519ddd DB |
256 | * The central event handler. Send_event() sends an event to the |
257 | * 16-bit subsystem, which then calls the relevant device drivers. | |
258 | * Parse_events() interprets the event bits from | |
259 | * a card status change report. Do_shutdown() handles the high | |
260 | * priority stuff associated with a card removal. | |
261 | */ | |
1da177e4 LT |
262 | |
263 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
264 | ||
265 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
266 | { | |
88b060d6 | 267 | if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL)) |
1da177e4 LT |
268 | return 0; |
269 | ||
d50dbec3 | 270 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
271 | event, priority, s->callback); |
272 | ||
273 | if (!s->callback) | |
274 | return 0; | |
1da177e4 | 275 | |
216d7cdd | 276 | return s->callback->event(s, event, priority); |
1da177e4 LT |
277 | } |
278 | ||
1da177e4 LT |
279 | static int socket_reset(struct pcmcia_socket *skt) |
280 | { | |
281 | int status, i; | |
282 | ||
d50dbec3 | 283 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
284 | |
285 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
286 | skt->ops->set_socket(skt, &skt->socket); | |
287 | udelay((long)reset_time); | |
288 | ||
289 | skt->socket.flags &= ~SS_RESET; | |
290 | skt->ops->set_socket(skt, &skt->socket); | |
291 | ||
292 | msleep(unreset_delay * 10); | |
293 | for (i = 0; i < unreset_limit; i++) { | |
294 | skt->ops->get_status(skt, &status); | |
295 | ||
296 | if (!(status & SS_DETECT)) | |
3939c1ef | 297 | return -ENODEV; |
1da177e4 LT |
298 | |
299 | if (status & SS_READY) | |
4c89e88b | 300 | return 0; |
1da177e4 LT |
301 | |
302 | msleep(unreset_check * 10); | |
303 | } | |
304 | ||
d50dbec3 | 305 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 306 | return -ETIMEDOUT; |
1da177e4 LT |
307 | } |
308 | ||
78187865 | 309 | /* |
6e493882 DR |
310 | * socket_setup() and socket_shutdown() are called by the main event handler |
311 | * when card insertion and removal events are received. | |
312 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
313 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
314 | */ | |
315 | static void socket_shutdown(struct pcmcia_socket *s) | |
316 | { | |
317 | int status; | |
318 | ||
d50dbec3 | 319 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 320 | |
88b060d6 | 321 | send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
9e86749c DB |
322 | |
323 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
324 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
325 | msleep(shutdown_delay * 10); | |
326 | s->state &= SOCKET_INUSE; | |
327 | ||
328 | /* Blank out the socket state */ | |
329 | s->socket = dead_socket; | |
330 | s->ops->init(s); | |
331 | s->ops->set_socket(s, &s->socket); | |
6e493882 | 332 | s->lock_count = 0; |
904e3777 DB |
333 | kfree(s->fake_cis); |
334 | s->fake_cis = NULL; | |
c3bfc96e DB |
335 | s->functions = 0; |
336 | ||
337 | /* From here on we can be sure that only we (that is, the | |
338 | * pccardd thread) accesses this socket, and all (16-bit) | |
339 | * PCMCIA interactions are gone. Therefore, release | |
340 | * ops_mutex so that we don't get a sysfs-related lockdep | |
341 | * warning. | |
342 | */ | |
343 | mutex_unlock(&s->ops_mutex); | |
344 | ||
6e493882 DR |
345 | #ifdef CONFIG_CARDBUS |
346 | cb_free(s); | |
347 | #endif | |
6e493882 | 348 | |
afb2c165 DR |
349 | /* give socket some time to power down */ |
350 | msleep(100); | |
351 | ||
6e493882 DR |
352 | s->ops->get_status(s, &status); |
353 | if (status & SS_POWERON) { | |
2e55bf6b DB |
354 | dev_printk(KERN_ERR, &s->dev, |
355 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
356 | } |
357 | ||
3970dd8c | 358 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
359 | } |
360 | ||
1da177e4 LT |
361 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
362 | { | |
363 | int status, i; | |
364 | ||
d50dbec3 | 365 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
366 | |
367 | skt->ops->get_status(skt, &status); | |
368 | if (!(status & SS_DETECT)) | |
3939c1ef | 369 | return -ENODEV; |
1da177e4 LT |
370 | |
371 | msleep(initial_delay * 10); | |
372 | ||
373 | for (i = 0; i < 100; i++) { | |
374 | skt->ops->get_status(skt, &status); | |
375 | if (!(status & SS_DETECT)) | |
3939c1ef | 376 | return -ENODEV; |
1da177e4 LT |
377 | |
378 | if (!(status & SS_PENDING)) | |
379 | break; | |
380 | ||
381 | msleep(100); | |
382 | } | |
383 | ||
384 | if (status & SS_PENDING) { | |
d50dbec3 DB |
385 | dev_printk(KERN_ERR, &skt->dev, |
386 | "voltage interrogation timed out.\n"); | |
8567142e | 387 | return -ETIMEDOUT; |
1da177e4 LT |
388 | } |
389 | ||
390 | if (status & SS_CARDBUS) { | |
5bc6b68a | 391 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
392 | dev_printk(KERN_ERR, &skt->dev, |
393 | "cardbus cards are not supported.\n"); | |
610e2374 | 394 | return -EINVAL; |
5bc6b68a | 395 | } |
1da177e4 | 396 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
397 | } else |
398 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
399 | |
400 | /* | |
401 | * Decode the card voltage requirements, and apply power to the card. | |
402 | */ | |
403 | if (status & SS_3VCARD) | |
404 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
405 | else if (!(status & SS_XVCARD)) | |
406 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
407 | else { | |
d50dbec3 | 408 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 409 | return -EIO; |
1da177e4 | 410 | } |
fa912bcb DR |
411 | |
412 | if (skt->power_hook) | |
413 | skt->power_hook(skt, HOOK_POWER_PRE); | |
414 | ||
1da177e4 LT |
415 | skt->socket.flags = 0; |
416 | skt->ops->set_socket(skt, &skt->socket); | |
417 | ||
418 | /* | |
419 | * Wait "vcc_settle" for the supply to stabilise. | |
420 | */ | |
421 | msleep(vcc_settle * 10); | |
422 | ||
423 | skt->ops->get_status(skt, &status); | |
424 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 425 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 426 | return -EIO; |
1da177e4 LT |
427 | } |
428 | ||
fa912bcb DR |
429 | status = socket_reset(skt); |
430 | ||
431 | if (skt->power_hook) | |
432 | skt->power_hook(skt, HOOK_POWER_POST); | |
433 | ||
434 | return status; | |
1da177e4 LT |
435 | } |
436 | ||
437 | /* | |
438 | * Handle card insertion. Setup the socket, reset the card, | |
439 | * and then tell the rest of PCMCIA that a card is present. | |
440 | */ | |
441 | static int socket_insert(struct pcmcia_socket *skt) | |
442 | { | |
443 | int ret; | |
444 | ||
d50dbec3 | 445 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 446 | |
9e86749c | 447 | mutex_lock(&skt->ops_mutex); |
f971dbd5 DB |
448 | if (skt->state & SOCKET_INUSE) { |
449 | mutex_unlock(&skt->ops_mutex); | |
450 | return -EINVAL; | |
451 | } | |
3970dd8c | 452 | skt->state |= SOCKET_INUSE; |
1da177e4 LT |
453 | |
454 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 455 | if (ret == 0) { |
1da177e4 | 456 | skt->state |= SOCKET_PRESENT; |
807277cb | 457 | |
2e55bf6b DB |
458 | dev_printk(KERN_NOTICE, &skt->dev, |
459 | "pccard: %s card inserted into slot %d\n", | |
460 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
461 | skt->sock); | |
807277cb | 462 | |
1da177e4 LT |
463 | #ifdef CONFIG_CARDBUS |
464 | if (skt->state & SOCKET_CARDBUS) { | |
465 | cb_alloc(skt); | |
466 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
467 | } | |
468 | #endif | |
d50dbec3 | 469 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 470 | mutex_unlock(&skt->ops_mutex); |
1da177e4 LT |
471 | |
472 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
473 | } else { | |
9e86749c | 474 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 475 | socket_shutdown(skt); |
1da177e4 LT |
476 | } |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
481 | static int socket_suspend(struct pcmcia_socket *skt) | |
482 | { | |
483 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 484 | return -EBUSY; |
1da177e4 | 485 | |
9e86749c | 486 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
487 | skt->suspended_state = skt->state; |
488 | ||
1da177e4 LT |
489 | skt->socket = dead_socket; |
490 | skt->ops->set_socket(skt, &skt->socket); | |
491 | if (skt->ops->suspend) | |
492 | skt->ops->suspend(skt); | |
493 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 494 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 495 | return 0; |
1da177e4 LT |
496 | } |
497 | ||
9905d1b4 | 498 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 499 | { |
9e86749c | 500 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
501 | skt->socket = dead_socket; |
502 | skt->ops->init(skt); | |
503 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
504 | if (skt->state & SOCKET_PRESENT) |
505 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 506 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
507 | return 0; |
508 | } | |
1da177e4 | 509 | |
9905d1b4 RW |
510 | static int socket_late_resume(struct pcmcia_socket *skt) |
511 | { | |
d7646f76 DB |
512 | int ret; |
513 | ||
9e86749c | 514 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 515 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 516 | mutex_unlock(&skt->ops_mutex); |
88b060d6 | 517 | |
d7646f76 DB |
518 | if (!(skt->state & SOCKET_PRESENT)) { |
519 | ret = socket_insert(skt); | |
520 | if (ret == -ENODEV) | |
521 | ret = 0; | |
522 | return ret; | |
523 | } | |
88b060d6 DB |
524 | |
525 | if (skt->resume_status) { | |
526 | socket_shutdown(skt); | |
527 | return 0; | |
1da177e4 LT |
528 | } |
529 | ||
88b060d6 DB |
530 | if (skt->suspended_state != skt->state) { |
531 | dev_dbg(&skt->dev, | |
532 | "suspend state 0x%x != resume state 0x%x\n", | |
533 | skt->suspended_state, skt->state); | |
534 | ||
1da177e4 | 535 | socket_shutdown(skt); |
88b060d6 | 536 | return socket_insert(skt); |
1da177e4 LT |
537 | } |
538 | ||
88b060d6 DB |
539 | #ifdef CONFIG_CARDBUS |
540 | if (skt->state & SOCKET_CARDBUS) { | |
541 | /* We can't be sure the CardBus card is the same | |
542 | * as the one previously inserted. Therefore, remove | |
543 | * and re-add... */ | |
544 | cb_free(skt); | |
545 | cb_alloc(skt); | |
546 | return 0; | |
547 | } | |
548 | #endif | |
1da177e4 | 549 | |
88b060d6 | 550 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
4c89e88b | 551 | return 0; |
1da177e4 LT |
552 | } |
553 | ||
9905d1b4 RW |
554 | /* |
555 | * Resume a socket. If a card is present, verify its CIS against | |
556 | * our cached copy. If they are different, the card has been | |
557 | * replaced, and we need to tell the drivers. | |
558 | */ | |
559 | static int socket_resume(struct pcmcia_socket *skt) | |
560 | { | |
561 | if (!(skt->state & SOCKET_SUSPEND)) | |
562 | return -EBUSY; | |
563 | ||
564 | socket_early_resume(skt); | |
565 | return socket_late_resume(skt); | |
566 | } | |
567 | ||
1da177e4 LT |
568 | static void socket_remove(struct pcmcia_socket *skt) |
569 | { | |
2e55bf6b DB |
570 | dev_printk(KERN_NOTICE, &skt->dev, |
571 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 572 | socket_shutdown(skt); |
1da177e4 LT |
573 | } |
574 | ||
575 | /* | |
576 | * Process a socket card detect status change. | |
577 | * | |
578 | * If we don't have a card already present, delay the detect event for | |
579 | * about 20ms (to be on the safe side) before reading the socket status. | |
580 | * | |
581 | * Some i82365-based systems send multiple SS_DETECT events during card | |
582 | * insertion, and the "card present" status bit seems to bounce. This | |
583 | * will probably be true with GPIO-based card detection systems after | |
584 | * the product has aged. | |
585 | */ | |
586 | static void socket_detect_change(struct pcmcia_socket *skt) | |
587 | { | |
588 | if (!(skt->state & SOCKET_SUSPEND)) { | |
589 | int status; | |
590 | ||
591 | if (!(skt->state & SOCKET_PRESENT)) | |
592 | msleep(20); | |
593 | ||
594 | skt->ops->get_status(skt, &status); | |
595 | if ((skt->state & SOCKET_PRESENT) && | |
596 | !(status & SS_DETECT)) | |
597 | socket_remove(skt); | |
598 | if (!(skt->state & SOCKET_PRESENT) && | |
599 | (status & SS_DETECT)) | |
600 | socket_insert(skt); | |
601 | } | |
602 | } | |
603 | ||
604 | static int pccardd(void *__skt) | |
605 | { | |
606 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
607 | int ret; |
608 | ||
1da177e4 LT |
609 | skt->thread = current; |
610 | skt->socket = dead_socket; | |
611 | skt->ops->init(skt); | |
612 | skt->ops->set_socket(skt, &skt->socket); | |
613 | ||
614 | /* register with the device core */ | |
87373318 | 615 | ret = device_register(&skt->dev); |
1da177e4 | 616 | if (ret) { |
2e55bf6b DB |
617 | dev_printk(KERN_WARNING, &skt->dev, |
618 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 619 | skt->thread = NULL; |
1da9ab73 SH |
620 | complete(&skt->thread_done); |
621 | return 0; | |
1da177e4 | 622 | } |
4356d73d DB |
623 | ret = pccard_sysfs_add_socket(&skt->dev); |
624 | if (ret) | |
625 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 626 | |
bf4de6f2 DR |
627 | complete(&skt->thread_done); |
628 | ||
d801c140 DB |
629 | /* wait for userspace to catch up */ |
630 | msleep(250); | |
631 | ||
83144186 | 632 | set_freezable(); |
1da177e4 LT |
633 | for (;;) { |
634 | unsigned long flags; | |
635 | unsigned int events; | |
f971dbd5 | 636 | unsigned int sysfs_events; |
1da177e4 LT |
637 | |
638 | set_current_state(TASK_INTERRUPTIBLE); | |
639 | ||
640 | spin_lock_irqsave(&skt->thread_lock, flags); | |
641 | events = skt->thread_events; | |
642 | skt->thread_events = 0; | |
f971dbd5 DB |
643 | sysfs_events = skt->sysfs_events; |
644 | skt->sysfs_events = 0; | |
1da177e4 LT |
645 | spin_unlock_irqrestore(&skt->thread_lock, flags); |
646 | ||
f971dbd5 | 647 | mutex_lock(&skt->skt_mutex); |
216d7cdd DB |
648 | if (events & SS_DETECT) |
649 | socket_detect_change(skt); | |
1da177e4 | 650 | |
f971dbd5 DB |
651 | if (sysfs_events) { |
652 | if (sysfs_events & PCMCIA_UEVENT_EJECT) | |
653 | socket_remove(skt); | |
654 | if (sysfs_events & PCMCIA_UEVENT_INSERT) | |
655 | socket_insert(skt); | |
f971dbd5 DB |
656 | if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && |
657 | !(skt->state & SOCKET_CARDBUS)) { | |
658 | if (skt->callback) | |
659 | ret = skt->callback->suspend(skt); | |
660 | else | |
661 | ret = 0; | |
43821242 | 662 | if (!ret) { |
f971dbd5 | 663 | socket_suspend(skt); |
43821242 DB |
664 | msleep(100); |
665 | } | |
666 | } | |
667 | if ((sysfs_events & PCMCIA_UEVENT_RESUME) && | |
668 | !(skt->state & SOCKET_CARDBUS)) { | |
669 | ret = socket_resume(skt); | |
670 | if (!ret && skt->callback) | |
671 | skt->callback->resume(skt); | |
f971dbd5 | 672 | } |
af461fc1 DB |
673 | if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && |
674 | !(skt->state & SOCKET_CARDBUS)) { | |
675 | if (!ret && skt->callback) | |
676 | skt->callback->requery(skt); | |
677 | } | |
f971dbd5 DB |
678 | } |
679 | mutex_unlock(&skt->skt_mutex); | |
680 | ||
681 | if (events || sysfs_events) | |
682 | continue; | |
683 | ||
1da9ab73 | 684 | if (kthread_should_stop()) |
1da177e4 | 685 | break; |
bf4de6f2 DR |
686 | |
687 | schedule(); | |
688 | try_to_freeze(); | |
1da177e4 | 689 | } |
220ec029 SR |
690 | /* make sure we are running before we exit */ |
691 | set_current_state(TASK_RUNNING); | |
692 | ||
3970dd8c DB |
693 | /* shut down socket, if a device is still present */ |
694 | if (skt->state & SOCKET_PRESENT) { | |
695 | mutex_lock(&skt->skt_mutex); | |
696 | socket_remove(skt); | |
697 | mutex_unlock(&skt->skt_mutex); | |
698 | } | |
699 | ||
1da177e4 | 700 | /* remove from the device core */ |
4356d73d | 701 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 702 | device_unregister(&skt->dev); |
1da177e4 | 703 | |
1da9ab73 | 704 | return 0; |
1da177e4 LT |
705 | } |
706 | ||
707 | /* | |
708 | * Yenta (at least) probes interrupts before registering the socket and | |
709 | * starting the handler thread. | |
710 | */ | |
711 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
712 | { | |
4b7a89a3 | 713 | unsigned long flags; |
d50dbec3 | 714 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 715 | if (s->thread) { |
4b7a89a3 | 716 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 717 | s->thread_events |= events; |
4b7a89a3 | 718 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 719 | |
0b402094 | 720 | wake_up_process(s->thread); |
1da177e4 LT |
721 | } |
722 | } /* pcmcia_parse_events */ | |
33519ddd | 723 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 724 | |
f971dbd5 DB |
725 | /** |
726 | * pcmcia_parse_uevents() - tell pccardd to issue manual commands | |
727 | * @s: the PCMCIA socket we wan't to command | |
728 | * @events: events to pass to pccardd | |
729 | * | |
730 | * userspace-issued insert, eject, suspend and resume commands must be | |
731 | * handled by pccardd to avoid any sysfs-related deadlocks. Valid events | |
732 | * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), | |
af461fc1 DB |
733 | * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) |
734 | * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). | |
f971dbd5 DB |
735 | */ |
736 | void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) | |
737 | { | |
738 | unsigned long flags; | |
739 | dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); | |
740 | if (s->thread) { | |
741 | spin_lock_irqsave(&s->thread_lock, flags); | |
742 | s->sysfs_events |= events; | |
743 | spin_unlock_irqrestore(&s->thread_lock, flags); | |
744 | ||
745 | wake_up_process(s->thread); | |
746 | } | |
747 | } | |
748 | EXPORT_SYMBOL(pcmcia_parse_uevents); | |
749 | ||
1da177e4 LT |
750 | |
751 | /* register pcmcia_callback */ | |
752 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
753 | { | |
9fea84f4 | 754 | int ret = 0; |
1da177e4 | 755 | |
7fe908dd DB |
756 | /* s->skt_mutex also protects s->callback */ |
757 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
758 | |
759 | if (c) { | |
760 | /* registration */ | |
761 | if (s->callback) { | |
762 | ret = -EBUSY; | |
763 | goto err; | |
764 | } | |
765 | ||
766 | s->callback = c; | |
767 | ||
768 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
769 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
770 | } else | |
771 | s->callback = NULL; | |
772 | err: | |
7fe908dd | 773 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
774 | |
775 | return ret; | |
776 | } | |
777 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
778 | ||
1da177e4 | 779 | |
33519ddd DB |
780 | /* I'm not sure which "reset" function this is supposed to use, |
781 | * but for now, it uses the low-level interface's reset, not the | |
782 | * CIS register. | |
783 | */ | |
1da177e4 | 784 | |
994917f8 | 785 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
786 | { |
787 | int ret; | |
33519ddd | 788 | |
d50dbec3 | 789 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 790 | |
7fe908dd | 791 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
792 | do { |
793 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 794 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 795 | ret = -ENODEV; |
1da177e4 LT |
796 | break; |
797 | } | |
798 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 799 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 800 | ret = -EBUSY; |
1da177e4 LT |
801 | break; |
802 | } | |
803 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 804 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 805 | ret = -EPERM; |
1da177e4 LT |
806 | break; |
807 | } | |
808 | ||
216d7cdd DB |
809 | if (skt->callback) |
810 | skt->callback->suspend(skt); | |
811 | mutex_lock(&skt->ops_mutex); | |
812 | ret = socket_reset(skt); | |
813 | mutex_unlock(&skt->ops_mutex); | |
814 | if ((ret == 0) && (skt->callback)) | |
815 | skt->callback->resume(skt); | |
1da177e4 | 816 | |
4c89e88b | 817 | ret = 0; |
1da177e4 | 818 | } while (0); |
7fe908dd | 819 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
820 | |
821 | return ret; | |
822 | } /* reset_card */ | |
994917f8 | 823 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 824 | |
1da177e4 | 825 | |
7eff2e7a KS |
826 | static int pcmcia_socket_uevent(struct device *dev, |
827 | struct kobj_uevent_env *env) | |
3ee13937 DB |
828 | { |
829 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 830 | |
7eff2e7a | 831 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
832 | return -ENOMEM; |
833 | ||
3ee13937 DB |
834 | return 0; |
835 | } | |
836 | ||
1da177e4 | 837 | |
378a33a6 DB |
838 | static struct completion pcmcia_unload; |
839 | ||
840 | static void pcmcia_release_socket_class(struct class *data) | |
841 | { | |
842 | complete(&pcmcia_unload); | |
843 | } | |
844 | ||
845 | ||
d7646f76 DB |
846 | #ifdef CONFIG_PM |
847 | ||
848 | static int __pcmcia_pm_op(struct device *dev, | |
849 | int (*callback) (struct pcmcia_socket *skt)) | |
850 | { | |
851 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
852 | int ret; | |
853 | ||
854 | mutex_lock(&s->skt_mutex); | |
855 | ret = callback(s); | |
856 | mutex_unlock(&s->skt_mutex); | |
857 | ||
858 | return ret; | |
859 | } | |
860 | ||
861 | static int pcmcia_socket_dev_suspend_noirq(struct device *dev) | |
862 | { | |
863 | return __pcmcia_pm_op(dev, socket_suspend); | |
864 | } | |
865 | ||
866 | static int pcmcia_socket_dev_resume_noirq(struct device *dev) | |
867 | { | |
868 | return __pcmcia_pm_op(dev, socket_early_resume); | |
869 | } | |
870 | ||
871 | static int pcmcia_socket_dev_resume(struct device *dev) | |
872 | { | |
873 | return __pcmcia_pm_op(dev, socket_late_resume); | |
874 | } | |
875 | ||
876 | static const struct dev_pm_ops pcmcia_socket_pm_ops = { | |
877 | /* dev_resume may be called with IRQs enabled */ | |
878 | SET_SYSTEM_SLEEP_PM_OPS(NULL, | |
879 | pcmcia_socket_dev_resume) | |
880 | ||
881 | /* late suspend must be called with IRQs disabled */ | |
882 | .suspend_noirq = pcmcia_socket_dev_suspend_noirq, | |
883 | .freeze_noirq = pcmcia_socket_dev_suspend_noirq, | |
884 | .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, | |
885 | ||
886 | /* early resume must be called with IRQs disabled */ | |
887 | .resume_noirq = pcmcia_socket_dev_resume_noirq, | |
888 | .thaw_noirq = pcmcia_socket_dev_resume_noirq, | |
889 | .restore_noirq = pcmcia_socket_dev_resume_noirq, | |
890 | }; | |
891 | ||
892 | #define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) | |
893 | ||
894 | #else /* CONFIG_PM */ | |
895 | ||
896 | #define PCMCIA_SOCKET_CLASS_PM_OPS NULL | |
897 | ||
898 | #endif /* CONFIG_PM */ | |
899 | ||
1da177e4 LT |
900 | struct class pcmcia_socket_class = { |
901 | .name = "pcmcia_socket", | |
87373318 GKH |
902 | .dev_uevent = pcmcia_socket_uevent, |
903 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 904 | .class_release = pcmcia_release_socket_class, |
d7646f76 | 905 | .pm = PCMCIA_SOCKET_CLASS_PM_OPS, |
1da177e4 LT |
906 | }; |
907 | EXPORT_SYMBOL(pcmcia_socket_class); | |
908 | ||
909 | ||
910 | static int __init init_pcmcia_cs(void) | |
911 | { | |
378a33a6 | 912 | init_completion(&pcmcia_unload); |
4356d73d | 913 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
914 | } |
915 | ||
916 | static void __exit exit_pcmcia_cs(void) | |
917 | { | |
33519ddd | 918 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 919 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
920 | } |
921 | ||
922 | subsys_initcall(init_pcmcia_cs); | |
923 | module_exit(exit_pcmcia_cs); | |
924 |