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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
1da177e4 LT |
32 | #include <asm/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
1da177e4 LT |
35 | #include <pcmcia/ss.h> |
36 | #include <pcmcia/cs.h> | |
1da177e4 LT |
37 | #include <pcmcia/cistpl.h> |
38 | #include <pcmcia/cisreg.h> | |
39 | #include <pcmcia/ds.h> | |
40 | #include "cs_internal.h" | |
41 | ||
1da177e4 LT |
42 | |
43 | /* Module parameters */ | |
44 | ||
45 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 46 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
47 | MODULE_LICENSE("GPL"); |
48 | ||
49 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
50 | ||
51 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
52 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
53 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
54 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
55 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
56 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
57 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
58 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
59 | ||
60 | /* Access speed for attribute memory windows */ | |
61 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
62 | ||
1da177e4 LT |
63 | |
64 | socket_state_t dead_socket = { | |
65 | .csc_mask = SS_DETECT, | |
66 | }; | |
33519ddd | 67 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
68 | |
69 | ||
70 | /* List of all sockets, protected by a rwsem */ | |
71 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 72 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 73 | |
33519ddd DB |
74 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
75 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 76 | |
1da177e4 | 77 | |
9fea84f4 | 78 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 79 | { |
87373318 GKH |
80 | struct device *dev = get_device(&skt->dev); |
81 | if (!dev) | |
1da177e4 | 82 | return NULL; |
593f010b | 83 | return dev_get_drvdata(dev); |
1da177e4 LT |
84 | } |
85 | EXPORT_SYMBOL(pcmcia_get_socket); | |
86 | ||
87 | ||
88 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
89 | { | |
87373318 | 90 | put_device(&skt->dev); |
1da177e4 LT |
91 | } |
92 | EXPORT_SYMBOL(pcmcia_put_socket); | |
93 | ||
94 | ||
87373318 | 95 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 96 | { |
87373318 | 97 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
98 | |
99 | complete(&socket->socket_released); | |
100 | } | |
101 | ||
102 | static int pccardd(void *__skt); | |
103 | ||
104 | /** | |
105 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 106 | * @socket: the &socket to register |
1da177e4 LT |
107 | */ |
108 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
109 | { | |
1da9ab73 | 110 | struct task_struct *tsk; |
1da177e4 LT |
111 | int ret; |
112 | ||
87373318 | 113 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
114 | return -EINVAL; |
115 | ||
d50dbec3 | 116 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 117 | |
1da177e4 | 118 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
119 | * register more than 2^sizeof(unsigned int) pcmcia |
120 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
121 | * anyways, so I don't care] */ |
122 | down_write(&pcmcia_socket_list_rwsem); | |
123 | if (list_empty(&pcmcia_socket_list)) | |
124 | socket->sock = 0; | |
125 | else { | |
126 | unsigned int found, i = 1; | |
127 | struct pcmcia_socket *tmp; | |
128 | do { | |
129 | found = 1; | |
130 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
131 | if (tmp->sock == i) | |
132 | found = 0; | |
133 | } | |
134 | i++; | |
135 | } while (!found); | |
136 | socket->sock = i - 1; | |
137 | } | |
138 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
139 | up_write(&pcmcia_socket_list_rwsem); | |
140 | ||
5bc6b68a RK |
141 | #ifndef CONFIG_CARDBUS |
142 | /* | |
143 | * If we do not support Cardbus, ensure that | |
144 | * the Cardbus socket capability is disabled. | |
145 | */ | |
146 | socket->features &= ~SS_CAP_CARDBUS; | |
147 | #endif | |
1da177e4 LT |
148 | |
149 | /* set proper values in socket->dev */ | |
87373318 | 150 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 151 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 152 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
153 | |
154 | /* base address = 0, map = 0 */ | |
155 | socket->cis_mem.flags = 0; | |
156 | socket->cis_mem.speed = cis_speed; | |
157 | ||
158 | INIT_LIST_HEAD(&socket->cis_cache); | |
159 | ||
160 | init_completion(&socket->socket_released); | |
161 | init_completion(&socket->thread_done); | |
7fe908dd | 162 | mutex_init(&socket->skt_mutex); |
6b8e087b | 163 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
164 | spin_lock_init(&socket->thread_lock); |
165 | ||
b1769450 | 166 | if (socket->resource_ops->init) { |
cfe5d809 | 167 | mutex_lock(&socket->ops_mutex); |
b1769450 | 168 | ret = socket->resource_ops->init(socket); |
cfe5d809 | 169 | mutex_unlock(&socket->ops_mutex); |
b1769450 DB |
170 | if (ret) |
171 | goto err; | |
172 | } | |
173 | ||
1da9ab73 SH |
174 | tsk = kthread_run(pccardd, socket, "pccardd"); |
175 | if (IS_ERR(tsk)) { | |
176 | ret = PTR_ERR(tsk); | |
1da177e4 | 177 | goto err; |
1da9ab73 | 178 | } |
1da177e4 LT |
179 | |
180 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 181 | if (!socket->thread) { |
2e55bf6b DB |
182 | dev_printk(KERN_WARNING, &socket->dev, |
183 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
184 | return -EIO; |
185 | } | |
1da9ab73 | 186 | |
1da177e4 LT |
187 | pcmcia_parse_events(socket, SS_DETECT); |
188 | ||
638bba55 DB |
189 | /* |
190 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
191 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
192 | * support to offer, so this is not a failure mode. | |
193 | */ | |
194 | request_module_nowait("pcmcia"); | |
195 | ||
1da177e4 LT |
196 | return 0; |
197 | ||
198 | err: | |
199 | down_write(&pcmcia_socket_list_rwsem); | |
200 | list_del(&socket->socket_list); | |
201 | up_write(&pcmcia_socket_list_rwsem); | |
202 | return ret; | |
203 | } /* pcmcia_register_socket */ | |
204 | EXPORT_SYMBOL(pcmcia_register_socket); | |
205 | ||
206 | ||
207 | /** | |
208 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 209 | * @socket: the &socket to unregister |
1da177e4 LT |
210 | */ |
211 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
212 | { | |
213 | if (!socket) | |
214 | return; | |
215 | ||
d50dbec3 | 216 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 217 | |
0b402094 | 218 | if (socket->thread) |
1da9ab73 | 219 | kthread_stop(socket->thread); |
0b402094 | 220 | |
1da177e4 LT |
221 | /* remove from our own list */ |
222 | down_write(&pcmcia_socket_list_rwsem); | |
223 | list_del(&socket->socket_list); | |
224 | up_write(&pcmcia_socket_list_rwsem); | |
225 | ||
226 | /* wait for sysfs to drop all references */ | |
cfe5d809 DB |
227 | if (socket->resource_ops->exit) { |
228 | mutex_lock(&socket->ops_mutex); | |
385ee871 | 229 | socket->resource_ops->exit(socket); |
cfe5d809 DB |
230 | mutex_unlock(&socket->ops_mutex); |
231 | } | |
1da177e4 LT |
232 | wait_for_completion(&socket->socket_released); |
233 | } /* pcmcia_unregister_socket */ | |
234 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
235 | ||
236 | ||
9fea84f4 | 237 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
238 | { |
239 | struct pcmcia_socket *s; | |
240 | ||
241 | down_read(&pcmcia_socket_list_rwsem); | |
242 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
243 | if (s->sock == nr) { | |
244 | up_read(&pcmcia_socket_list_rwsem); | |
245 | return s; | |
246 | } | |
247 | up_read(&pcmcia_socket_list_rwsem); | |
248 | ||
249 | return NULL; | |
250 | ||
251 | } | |
252 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
253 | ||
1da177e4 LT |
254 | static int socket_reset(struct pcmcia_socket *skt) |
255 | { | |
256 | int status, i; | |
257 | ||
d50dbec3 | 258 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
259 | |
260 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
261 | skt->ops->set_socket(skt, &skt->socket); | |
262 | udelay((long)reset_time); | |
263 | ||
264 | skt->socket.flags &= ~SS_RESET; | |
265 | skt->ops->set_socket(skt, &skt->socket); | |
266 | ||
267 | msleep(unreset_delay * 10); | |
268 | for (i = 0; i < unreset_limit; i++) { | |
269 | skt->ops->get_status(skt, &status); | |
270 | ||
271 | if (!(status & SS_DETECT)) | |
3939c1ef | 272 | return -ENODEV; |
1da177e4 LT |
273 | |
274 | if (status & SS_READY) | |
4c89e88b | 275 | return 0; |
1da177e4 LT |
276 | |
277 | msleep(unreset_check * 10); | |
278 | } | |
279 | ||
d50dbec3 | 280 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 281 | return -ETIMEDOUT; |
1da177e4 LT |
282 | } |
283 | ||
78187865 | 284 | /* |
6e493882 DR |
285 | * socket_setup() and socket_shutdown() are called by the main event handler |
286 | * when card insertion and removal events are received. | |
287 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
288 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
289 | */ | |
290 | static void socket_shutdown(struct pcmcia_socket *s) | |
291 | { | |
292 | int status; | |
293 | ||
d50dbec3 | 294 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 295 | |
7b24e798 DB |
296 | if (s->callback) |
297 | s->callback->remove(s); | |
9e86749c DB |
298 | |
299 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
300 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
301 | msleep(shutdown_delay * 10); | |
302 | s->state &= SOCKET_INUSE; | |
303 | ||
304 | /* Blank out the socket state */ | |
305 | s->socket = dead_socket; | |
306 | s->ops->init(s); | |
307 | s->ops->set_socket(s, &s->socket); | |
6e493882 | 308 | s->lock_count = 0; |
904e3777 DB |
309 | kfree(s->fake_cis); |
310 | s->fake_cis = NULL; | |
c3bfc96e DB |
311 | s->functions = 0; |
312 | ||
313 | /* From here on we can be sure that only we (that is, the | |
314 | * pccardd thread) accesses this socket, and all (16-bit) | |
315 | * PCMCIA interactions are gone. Therefore, release | |
316 | * ops_mutex so that we don't get a sysfs-related lockdep | |
317 | * warning. | |
318 | */ | |
319 | mutex_unlock(&s->ops_mutex); | |
320 | ||
6e493882 DR |
321 | #ifdef CONFIG_CARDBUS |
322 | cb_free(s); | |
323 | #endif | |
6e493882 | 324 | |
afb2c165 DR |
325 | /* give socket some time to power down */ |
326 | msleep(100); | |
327 | ||
6e493882 DR |
328 | s->ops->get_status(s, &status); |
329 | if (status & SS_POWERON) { | |
2e55bf6b DB |
330 | dev_printk(KERN_ERR, &s->dev, |
331 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
332 | } |
333 | ||
3970dd8c | 334 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
335 | } |
336 | ||
1da177e4 LT |
337 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
338 | { | |
339 | int status, i; | |
340 | ||
d50dbec3 | 341 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
342 | |
343 | skt->ops->get_status(skt, &status); | |
344 | if (!(status & SS_DETECT)) | |
3939c1ef | 345 | return -ENODEV; |
1da177e4 LT |
346 | |
347 | msleep(initial_delay * 10); | |
348 | ||
349 | for (i = 0; i < 100; i++) { | |
350 | skt->ops->get_status(skt, &status); | |
351 | if (!(status & SS_DETECT)) | |
3939c1ef | 352 | return -ENODEV; |
1da177e4 LT |
353 | |
354 | if (!(status & SS_PENDING)) | |
355 | break; | |
356 | ||
357 | msleep(100); | |
358 | } | |
359 | ||
360 | if (status & SS_PENDING) { | |
d50dbec3 DB |
361 | dev_printk(KERN_ERR, &skt->dev, |
362 | "voltage interrogation timed out.\n"); | |
8567142e | 363 | return -ETIMEDOUT; |
1da177e4 LT |
364 | } |
365 | ||
366 | if (status & SS_CARDBUS) { | |
5bc6b68a | 367 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
368 | dev_printk(KERN_ERR, &skt->dev, |
369 | "cardbus cards are not supported.\n"); | |
610e2374 | 370 | return -EINVAL; |
5bc6b68a | 371 | } |
1da177e4 | 372 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
373 | } else |
374 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
375 | |
376 | /* | |
377 | * Decode the card voltage requirements, and apply power to the card. | |
378 | */ | |
379 | if (status & SS_3VCARD) | |
380 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
381 | else if (!(status & SS_XVCARD)) | |
382 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
383 | else { | |
d50dbec3 | 384 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 385 | return -EIO; |
1da177e4 | 386 | } |
fa912bcb DR |
387 | |
388 | if (skt->power_hook) | |
389 | skt->power_hook(skt, HOOK_POWER_PRE); | |
390 | ||
1da177e4 LT |
391 | skt->socket.flags = 0; |
392 | skt->ops->set_socket(skt, &skt->socket); | |
393 | ||
394 | /* | |
395 | * Wait "vcc_settle" for the supply to stabilise. | |
396 | */ | |
397 | msleep(vcc_settle * 10); | |
398 | ||
399 | skt->ops->get_status(skt, &status); | |
400 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 401 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 402 | return -EIO; |
1da177e4 LT |
403 | } |
404 | ||
fa912bcb DR |
405 | status = socket_reset(skt); |
406 | ||
407 | if (skt->power_hook) | |
408 | skt->power_hook(skt, HOOK_POWER_POST); | |
409 | ||
410 | return status; | |
1da177e4 LT |
411 | } |
412 | ||
413 | /* | |
414 | * Handle card insertion. Setup the socket, reset the card, | |
415 | * and then tell the rest of PCMCIA that a card is present. | |
416 | */ | |
417 | static int socket_insert(struct pcmcia_socket *skt) | |
418 | { | |
419 | int ret; | |
420 | ||
d50dbec3 | 421 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 422 | |
9e86749c | 423 | mutex_lock(&skt->ops_mutex); |
f971dbd5 DB |
424 | if (skt->state & SOCKET_INUSE) { |
425 | mutex_unlock(&skt->ops_mutex); | |
426 | return -EINVAL; | |
427 | } | |
3970dd8c | 428 | skt->state |= SOCKET_INUSE; |
1da177e4 LT |
429 | |
430 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 431 | if (ret == 0) { |
1da177e4 | 432 | skt->state |= SOCKET_PRESENT; |
807277cb | 433 | |
2e55bf6b DB |
434 | dev_printk(KERN_NOTICE, &skt->dev, |
435 | "pccard: %s card inserted into slot %d\n", | |
436 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
437 | skt->sock); | |
807277cb | 438 | |
1da177e4 LT |
439 | #ifdef CONFIG_CARDBUS |
440 | if (skt->state & SOCKET_CARDBUS) { | |
441 | cb_alloc(skt); | |
442 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
443 | } | |
444 | #endif | |
d50dbec3 | 445 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 446 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 447 | |
7b24e798 DB |
448 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
449 | skt->callback->add(skt); | |
1da177e4 | 450 | } else { |
9e86749c | 451 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 452 | socket_shutdown(skt); |
1da177e4 LT |
453 | } |
454 | ||
455 | return ret; | |
456 | } | |
457 | ||
458 | static int socket_suspend(struct pcmcia_socket *skt) | |
459 | { | |
460 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 461 | return -EBUSY; |
1da177e4 | 462 | |
9e86749c | 463 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
464 | skt->suspended_state = skt->state; |
465 | ||
1da177e4 LT |
466 | skt->socket = dead_socket; |
467 | skt->ops->set_socket(skt, &skt->socket); | |
468 | if (skt->ops->suspend) | |
469 | skt->ops->suspend(skt); | |
470 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 471 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 472 | return 0; |
1da177e4 LT |
473 | } |
474 | ||
9905d1b4 | 475 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 476 | { |
9e86749c | 477 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
478 | skt->socket = dead_socket; |
479 | skt->ops->init(skt); | |
480 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
481 | if (skt->state & SOCKET_PRESENT) |
482 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 483 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
484 | return 0; |
485 | } | |
1da177e4 | 486 | |
9905d1b4 RW |
487 | static int socket_late_resume(struct pcmcia_socket *skt) |
488 | { | |
d7646f76 DB |
489 | int ret; |
490 | ||
9e86749c | 491 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 492 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 493 | mutex_unlock(&skt->ops_mutex); |
88b060d6 | 494 | |
d7646f76 DB |
495 | if (!(skt->state & SOCKET_PRESENT)) { |
496 | ret = socket_insert(skt); | |
497 | if (ret == -ENODEV) | |
498 | ret = 0; | |
499 | return ret; | |
500 | } | |
88b060d6 DB |
501 | |
502 | if (skt->resume_status) { | |
503 | socket_shutdown(skt); | |
504 | return 0; | |
1da177e4 LT |
505 | } |
506 | ||
88b060d6 DB |
507 | if (skt->suspended_state != skt->state) { |
508 | dev_dbg(&skt->dev, | |
509 | "suspend state 0x%x != resume state 0x%x\n", | |
510 | skt->suspended_state, skt->state); | |
511 | ||
1da177e4 | 512 | socket_shutdown(skt); |
88b060d6 | 513 | return socket_insert(skt); |
1da177e4 LT |
514 | } |
515 | ||
88b060d6 DB |
516 | #ifdef CONFIG_CARDBUS |
517 | if (skt->state & SOCKET_CARDBUS) { | |
518 | /* We can't be sure the CardBus card is the same | |
519 | * as the one previously inserted. Therefore, remove | |
520 | * and re-add... */ | |
521 | cb_free(skt); | |
522 | cb_alloc(skt); | |
523 | return 0; | |
524 | } | |
525 | #endif | |
7b24e798 DB |
526 | if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) |
527 | skt->callback->early_resume(skt); | |
4c89e88b | 528 | return 0; |
1da177e4 LT |
529 | } |
530 | ||
9905d1b4 RW |
531 | /* |
532 | * Resume a socket. If a card is present, verify its CIS against | |
533 | * our cached copy. If they are different, the card has been | |
534 | * replaced, and we need to tell the drivers. | |
535 | */ | |
536 | static int socket_resume(struct pcmcia_socket *skt) | |
537 | { | |
538 | if (!(skt->state & SOCKET_SUSPEND)) | |
539 | return -EBUSY; | |
540 | ||
541 | socket_early_resume(skt); | |
542 | return socket_late_resume(skt); | |
543 | } | |
544 | ||
1da177e4 LT |
545 | static void socket_remove(struct pcmcia_socket *skt) |
546 | { | |
2e55bf6b DB |
547 | dev_printk(KERN_NOTICE, &skt->dev, |
548 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 549 | socket_shutdown(skt); |
1da177e4 LT |
550 | } |
551 | ||
552 | /* | |
553 | * Process a socket card detect status change. | |
554 | * | |
555 | * If we don't have a card already present, delay the detect event for | |
556 | * about 20ms (to be on the safe side) before reading the socket status. | |
557 | * | |
558 | * Some i82365-based systems send multiple SS_DETECT events during card | |
559 | * insertion, and the "card present" status bit seems to bounce. This | |
560 | * will probably be true with GPIO-based card detection systems after | |
561 | * the product has aged. | |
562 | */ | |
563 | static void socket_detect_change(struct pcmcia_socket *skt) | |
564 | { | |
565 | if (!(skt->state & SOCKET_SUSPEND)) { | |
566 | int status; | |
567 | ||
568 | if (!(skt->state & SOCKET_PRESENT)) | |
569 | msleep(20); | |
570 | ||
571 | skt->ops->get_status(skt, &status); | |
572 | if ((skt->state & SOCKET_PRESENT) && | |
573 | !(status & SS_DETECT)) | |
574 | socket_remove(skt); | |
575 | if (!(skt->state & SOCKET_PRESENT) && | |
576 | (status & SS_DETECT)) | |
577 | socket_insert(skt); | |
578 | } | |
579 | } | |
580 | ||
581 | static int pccardd(void *__skt) | |
582 | { | |
583 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
584 | int ret; |
585 | ||
1da177e4 LT |
586 | skt->thread = current; |
587 | skt->socket = dead_socket; | |
588 | skt->ops->init(skt); | |
589 | skt->ops->set_socket(skt, &skt->socket); | |
590 | ||
591 | /* register with the device core */ | |
87373318 | 592 | ret = device_register(&skt->dev); |
1da177e4 | 593 | if (ret) { |
2e55bf6b DB |
594 | dev_printk(KERN_WARNING, &skt->dev, |
595 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 596 | skt->thread = NULL; |
1da9ab73 SH |
597 | complete(&skt->thread_done); |
598 | return 0; | |
1da177e4 | 599 | } |
4356d73d DB |
600 | ret = pccard_sysfs_add_socket(&skt->dev); |
601 | if (ret) | |
602 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 603 | |
bf4de6f2 DR |
604 | complete(&skt->thread_done); |
605 | ||
d801c140 DB |
606 | /* wait for userspace to catch up */ |
607 | msleep(250); | |
608 | ||
83144186 | 609 | set_freezable(); |
1da177e4 LT |
610 | for (;;) { |
611 | unsigned long flags; | |
612 | unsigned int events; | |
f971dbd5 | 613 | unsigned int sysfs_events; |
1da177e4 LT |
614 | |
615 | set_current_state(TASK_INTERRUPTIBLE); | |
616 | ||
617 | spin_lock_irqsave(&skt->thread_lock, flags); | |
618 | events = skt->thread_events; | |
619 | skt->thread_events = 0; | |
f971dbd5 DB |
620 | sysfs_events = skt->sysfs_events; |
621 | skt->sysfs_events = 0; | |
1da177e4 LT |
622 | spin_unlock_irqrestore(&skt->thread_lock, flags); |
623 | ||
f971dbd5 | 624 | mutex_lock(&skt->skt_mutex); |
216d7cdd DB |
625 | if (events & SS_DETECT) |
626 | socket_detect_change(skt); | |
1da177e4 | 627 | |
f971dbd5 DB |
628 | if (sysfs_events) { |
629 | if (sysfs_events & PCMCIA_UEVENT_EJECT) | |
630 | socket_remove(skt); | |
631 | if (sysfs_events & PCMCIA_UEVENT_INSERT) | |
632 | socket_insert(skt); | |
f971dbd5 DB |
633 | if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && |
634 | !(skt->state & SOCKET_CARDBUS)) { | |
635 | if (skt->callback) | |
636 | ret = skt->callback->suspend(skt); | |
637 | else | |
638 | ret = 0; | |
43821242 | 639 | if (!ret) { |
f971dbd5 | 640 | socket_suspend(skt); |
43821242 DB |
641 | msleep(100); |
642 | } | |
643 | } | |
644 | if ((sysfs_events & PCMCIA_UEVENT_RESUME) && | |
645 | !(skt->state & SOCKET_CARDBUS)) { | |
646 | ret = socket_resume(skt); | |
647 | if (!ret && skt->callback) | |
648 | skt->callback->resume(skt); | |
f971dbd5 | 649 | } |
af461fc1 DB |
650 | if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && |
651 | !(skt->state & SOCKET_CARDBUS)) { | |
652 | if (!ret && skt->callback) | |
653 | skt->callback->requery(skt); | |
654 | } | |
f971dbd5 DB |
655 | } |
656 | mutex_unlock(&skt->skt_mutex); | |
657 | ||
658 | if (events || sysfs_events) | |
659 | continue; | |
660 | ||
1da9ab73 | 661 | if (kthread_should_stop()) |
1da177e4 | 662 | break; |
bf4de6f2 DR |
663 | |
664 | schedule(); | |
665 | try_to_freeze(); | |
1da177e4 | 666 | } |
220ec029 SR |
667 | /* make sure we are running before we exit */ |
668 | set_current_state(TASK_RUNNING); | |
669 | ||
3970dd8c DB |
670 | /* shut down socket, if a device is still present */ |
671 | if (skt->state & SOCKET_PRESENT) { | |
672 | mutex_lock(&skt->skt_mutex); | |
673 | socket_remove(skt); | |
674 | mutex_unlock(&skt->skt_mutex); | |
675 | } | |
676 | ||
1da177e4 | 677 | /* remove from the device core */ |
4356d73d | 678 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 679 | device_unregister(&skt->dev); |
1da177e4 | 680 | |
1da9ab73 | 681 | return 0; |
1da177e4 LT |
682 | } |
683 | ||
684 | /* | |
685 | * Yenta (at least) probes interrupts before registering the socket and | |
686 | * starting the handler thread. | |
687 | */ | |
688 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
689 | { | |
4b7a89a3 | 690 | unsigned long flags; |
d50dbec3 | 691 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 692 | if (s->thread) { |
4b7a89a3 | 693 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 694 | s->thread_events |= events; |
4b7a89a3 | 695 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 696 | |
0b402094 | 697 | wake_up_process(s->thread); |
1da177e4 LT |
698 | } |
699 | } /* pcmcia_parse_events */ | |
33519ddd | 700 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 701 | |
f971dbd5 DB |
702 | /** |
703 | * pcmcia_parse_uevents() - tell pccardd to issue manual commands | |
704 | * @s: the PCMCIA socket we wan't to command | |
705 | * @events: events to pass to pccardd | |
706 | * | |
707 | * userspace-issued insert, eject, suspend and resume commands must be | |
708 | * handled by pccardd to avoid any sysfs-related deadlocks. Valid events | |
709 | * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), | |
af461fc1 DB |
710 | * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) |
711 | * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). | |
f971dbd5 DB |
712 | */ |
713 | void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) | |
714 | { | |
715 | unsigned long flags; | |
716 | dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); | |
717 | if (s->thread) { | |
718 | spin_lock_irqsave(&s->thread_lock, flags); | |
719 | s->sysfs_events |= events; | |
720 | spin_unlock_irqrestore(&s->thread_lock, flags); | |
721 | ||
722 | wake_up_process(s->thread); | |
723 | } | |
724 | } | |
725 | EXPORT_SYMBOL(pcmcia_parse_uevents); | |
726 | ||
1da177e4 LT |
727 | |
728 | /* register pcmcia_callback */ | |
729 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
730 | { | |
9fea84f4 | 731 | int ret = 0; |
1da177e4 | 732 | |
7fe908dd DB |
733 | /* s->skt_mutex also protects s->callback */ |
734 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
735 | |
736 | if (c) { | |
737 | /* registration */ | |
738 | if (s->callback) { | |
739 | ret = -EBUSY; | |
740 | goto err; | |
741 | } | |
742 | ||
743 | s->callback = c; | |
744 | ||
745 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
7b24e798 | 746 | s->callback->add(s); |
1da177e4 LT |
747 | } else |
748 | s->callback = NULL; | |
749 | err: | |
7fe908dd | 750 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
751 | |
752 | return ret; | |
753 | } | |
754 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
755 | ||
1da177e4 | 756 | |
33519ddd DB |
757 | /* I'm not sure which "reset" function this is supposed to use, |
758 | * but for now, it uses the low-level interface's reset, not the | |
759 | * CIS register. | |
760 | */ | |
1da177e4 | 761 | |
994917f8 | 762 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
763 | { |
764 | int ret; | |
33519ddd | 765 | |
d50dbec3 | 766 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 767 | |
7fe908dd | 768 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
769 | do { |
770 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 771 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 772 | ret = -ENODEV; |
1da177e4 LT |
773 | break; |
774 | } | |
775 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 776 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 777 | ret = -EBUSY; |
1da177e4 LT |
778 | break; |
779 | } | |
780 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 781 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 782 | ret = -EPERM; |
1da177e4 LT |
783 | break; |
784 | } | |
785 | ||
216d7cdd DB |
786 | if (skt->callback) |
787 | skt->callback->suspend(skt); | |
788 | mutex_lock(&skt->ops_mutex); | |
789 | ret = socket_reset(skt); | |
790 | mutex_unlock(&skt->ops_mutex); | |
791 | if ((ret == 0) && (skt->callback)) | |
792 | skt->callback->resume(skt); | |
1da177e4 | 793 | |
4c89e88b | 794 | ret = 0; |
1da177e4 | 795 | } while (0); |
7fe908dd | 796 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
797 | |
798 | return ret; | |
799 | } /* reset_card */ | |
994917f8 | 800 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 801 | |
1da177e4 | 802 | |
7eff2e7a KS |
803 | static int pcmcia_socket_uevent(struct device *dev, |
804 | struct kobj_uevent_env *env) | |
3ee13937 DB |
805 | { |
806 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 807 | |
7eff2e7a | 808 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
809 | return -ENOMEM; |
810 | ||
3ee13937 DB |
811 | return 0; |
812 | } | |
813 | ||
1da177e4 | 814 | |
378a33a6 DB |
815 | static struct completion pcmcia_unload; |
816 | ||
817 | static void pcmcia_release_socket_class(struct class *data) | |
818 | { | |
819 | complete(&pcmcia_unload); | |
820 | } | |
821 | ||
822 | ||
d7646f76 DB |
823 | #ifdef CONFIG_PM |
824 | ||
825 | static int __pcmcia_pm_op(struct device *dev, | |
826 | int (*callback) (struct pcmcia_socket *skt)) | |
827 | { | |
828 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
829 | int ret; | |
830 | ||
831 | mutex_lock(&s->skt_mutex); | |
832 | ret = callback(s); | |
833 | mutex_unlock(&s->skt_mutex); | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
838 | static int pcmcia_socket_dev_suspend_noirq(struct device *dev) | |
839 | { | |
840 | return __pcmcia_pm_op(dev, socket_suspend); | |
841 | } | |
842 | ||
843 | static int pcmcia_socket_dev_resume_noirq(struct device *dev) | |
844 | { | |
845 | return __pcmcia_pm_op(dev, socket_early_resume); | |
846 | } | |
847 | ||
848 | static int pcmcia_socket_dev_resume(struct device *dev) | |
849 | { | |
850 | return __pcmcia_pm_op(dev, socket_late_resume); | |
851 | } | |
852 | ||
853 | static const struct dev_pm_ops pcmcia_socket_pm_ops = { | |
854 | /* dev_resume may be called with IRQs enabled */ | |
855 | SET_SYSTEM_SLEEP_PM_OPS(NULL, | |
856 | pcmcia_socket_dev_resume) | |
857 | ||
858 | /* late suspend must be called with IRQs disabled */ | |
859 | .suspend_noirq = pcmcia_socket_dev_suspend_noirq, | |
860 | .freeze_noirq = pcmcia_socket_dev_suspend_noirq, | |
861 | .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, | |
862 | ||
863 | /* early resume must be called with IRQs disabled */ | |
864 | .resume_noirq = pcmcia_socket_dev_resume_noirq, | |
865 | .thaw_noirq = pcmcia_socket_dev_resume_noirq, | |
866 | .restore_noirq = pcmcia_socket_dev_resume_noirq, | |
867 | }; | |
868 | ||
869 | #define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) | |
870 | ||
871 | #else /* CONFIG_PM */ | |
872 | ||
873 | #define PCMCIA_SOCKET_CLASS_PM_OPS NULL | |
874 | ||
875 | #endif /* CONFIG_PM */ | |
876 | ||
1da177e4 LT |
877 | struct class pcmcia_socket_class = { |
878 | .name = "pcmcia_socket", | |
87373318 GKH |
879 | .dev_uevent = pcmcia_socket_uevent, |
880 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 881 | .class_release = pcmcia_release_socket_class, |
d7646f76 | 882 | .pm = PCMCIA_SOCKET_CLASS_PM_OPS, |
1da177e4 LT |
883 | }; |
884 | EXPORT_SYMBOL(pcmcia_socket_class); | |
885 | ||
886 | ||
887 | static int __init init_pcmcia_cs(void) | |
888 | { | |
378a33a6 | 889 | init_completion(&pcmcia_unload); |
4356d73d | 890 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
891 | } |
892 | ||
893 | static void __exit exit_pcmcia_cs(void) | |
894 | { | |
33519ddd | 895 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 896 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
897 | } |
898 | ||
899 | subsys_initcall(init_pcmcia_cs); | |
900 | module_exit(exit_pcmcia_cs); | |
901 |