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 | |
78187865 | 79 | /* |
33519ddd DB |
80 | * Low-level PCMCIA socket drivers need to register with the PCCard |
81 | * core using pcmcia_register_socket. | |
82 | * | |
83 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
84 | * .drv struct: |
85 | * - pcmcia_socket_dev_suspend | |
86 | * - pcmcia_socket_dev_resume | |
87 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
88 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
89 | */ | |
9905d1b4 RW |
90 | static int socket_early_resume(struct pcmcia_socket *skt); |
91 | static int socket_late_resume(struct pcmcia_socket *skt); | |
1da177e4 LT |
92 | static int socket_resume(struct pcmcia_socket *skt); |
93 | static int socket_suspend(struct pcmcia_socket *skt); | |
94 | ||
9905d1b4 RW |
95 | static void pcmcia_socket_dev_run(struct device *dev, |
96 | int (*cb)(struct pcmcia_socket *)) | |
1da177e4 LT |
97 | { |
98 | struct pcmcia_socket *socket; | |
99 | ||
100 | down_read(&pcmcia_socket_list_rwsem); | |
101 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 102 | if (socket->dev.parent != dev) |
1da177e4 | 103 | continue; |
7fe908dd | 104 | mutex_lock(&socket->skt_mutex); |
9905d1b4 | 105 | cb(socket); |
7fe908dd | 106 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
107 | } |
108 | up_read(&pcmcia_socket_list_rwsem); | |
9905d1b4 | 109 | } |
1da177e4 | 110 | |
9905d1b4 RW |
111 | int pcmcia_socket_dev_suspend(struct device *dev) |
112 | { | |
113 | pcmcia_socket_dev_run(dev, socket_suspend); | |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
117 | ||
9905d1b4 | 118 | void pcmcia_socket_dev_early_resume(struct device *dev) |
1da177e4 | 119 | { |
9905d1b4 RW |
120 | pcmcia_socket_dev_run(dev, socket_early_resume); |
121 | } | |
122 | EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); | |
1da177e4 | 123 | |
9905d1b4 RW |
124 | void pcmcia_socket_dev_late_resume(struct device *dev) |
125 | { | |
126 | pcmcia_socket_dev_run(dev, socket_late_resume); | |
127 | } | |
128 | EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); | |
1da177e4 | 129 | |
9905d1b4 RW |
130 | int pcmcia_socket_dev_resume(struct device *dev) |
131 | { | |
132 | pcmcia_socket_dev_run(dev, socket_resume); | |
1da177e4 LT |
133 | return 0; |
134 | } | |
135 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
136 | ||
137 | ||
9fea84f4 | 138 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 139 | { |
87373318 GKH |
140 | struct device *dev = get_device(&skt->dev); |
141 | if (!dev) | |
1da177e4 | 142 | return NULL; |
593f010b | 143 | return dev_get_drvdata(dev); |
1da177e4 LT |
144 | } |
145 | EXPORT_SYMBOL(pcmcia_get_socket); | |
146 | ||
147 | ||
148 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
149 | { | |
87373318 | 150 | put_device(&skt->dev); |
1da177e4 LT |
151 | } |
152 | EXPORT_SYMBOL(pcmcia_put_socket); | |
153 | ||
154 | ||
87373318 | 155 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 156 | { |
87373318 | 157 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
158 | |
159 | complete(&socket->socket_released); | |
160 | } | |
161 | ||
162 | static int pccardd(void *__skt); | |
163 | ||
164 | /** | |
165 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 166 | * @socket: the &socket to register |
1da177e4 LT |
167 | */ |
168 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
169 | { | |
1da9ab73 | 170 | struct task_struct *tsk; |
1da177e4 LT |
171 | int ret; |
172 | ||
87373318 | 173 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
174 | return -EINVAL; |
175 | ||
d50dbec3 | 176 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 LT |
177 | |
178 | spin_lock_init(&socket->lock); | |
179 | ||
1da177e4 | 180 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
181 | * register more than 2^sizeof(unsigned int) pcmcia |
182 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
183 | * anyways, so I don't care] */ |
184 | down_write(&pcmcia_socket_list_rwsem); | |
185 | if (list_empty(&pcmcia_socket_list)) | |
186 | socket->sock = 0; | |
187 | else { | |
188 | unsigned int found, i = 1; | |
189 | struct pcmcia_socket *tmp; | |
190 | do { | |
191 | found = 1; | |
192 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
193 | if (tmp->sock == i) | |
194 | found = 0; | |
195 | } | |
196 | i++; | |
197 | } while (!found); | |
198 | socket->sock = i - 1; | |
199 | } | |
200 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
201 | up_write(&pcmcia_socket_list_rwsem); | |
202 | ||
5bc6b68a RK |
203 | #ifndef CONFIG_CARDBUS |
204 | /* | |
205 | * If we do not support Cardbus, ensure that | |
206 | * the Cardbus socket capability is disabled. | |
207 | */ | |
208 | socket->features &= ~SS_CAP_CARDBUS; | |
209 | #endif | |
1da177e4 LT |
210 | |
211 | /* set proper values in socket->dev */ | |
87373318 | 212 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 213 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 214 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
215 | |
216 | /* base address = 0, map = 0 */ | |
217 | socket->cis_mem.flags = 0; | |
218 | socket->cis_mem.speed = cis_speed; | |
219 | ||
220 | INIT_LIST_HEAD(&socket->cis_cache); | |
221 | ||
222 | init_completion(&socket->socket_released); | |
223 | init_completion(&socket->thread_done); | |
7fe908dd | 224 | mutex_init(&socket->skt_mutex); |
1da177e4 LT |
225 | spin_lock_init(&socket->thread_lock); |
226 | ||
b1769450 DB |
227 | if (socket->resource_ops->init) { |
228 | ret = socket->resource_ops->init(socket); | |
229 | if (ret) | |
230 | goto err; | |
231 | } | |
232 | ||
1da9ab73 SH |
233 | tsk = kthread_run(pccardd, socket, "pccardd"); |
234 | if (IS_ERR(tsk)) { | |
235 | ret = PTR_ERR(tsk); | |
1da177e4 | 236 | goto err; |
1da9ab73 | 237 | } |
1da177e4 LT |
238 | |
239 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 240 | if (!socket->thread) { |
2e55bf6b DB |
241 | dev_printk(KERN_WARNING, &socket->dev, |
242 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
243 | return -EIO; |
244 | } | |
1da9ab73 | 245 | |
1da177e4 LT |
246 | pcmcia_parse_events(socket, SS_DETECT); |
247 | ||
638bba55 DB |
248 | /* |
249 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
250 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
251 | * support to offer, so this is not a failure mode. | |
252 | */ | |
253 | request_module_nowait("pcmcia"); | |
254 | ||
1da177e4 LT |
255 | return 0; |
256 | ||
257 | err: | |
258 | down_write(&pcmcia_socket_list_rwsem); | |
259 | list_del(&socket->socket_list); | |
260 | up_write(&pcmcia_socket_list_rwsem); | |
261 | return ret; | |
262 | } /* pcmcia_register_socket */ | |
263 | EXPORT_SYMBOL(pcmcia_register_socket); | |
264 | ||
265 | ||
266 | /** | |
267 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 268 | * @socket: the &socket to unregister |
1da177e4 LT |
269 | */ |
270 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
271 | { | |
272 | if (!socket) | |
273 | return; | |
274 | ||
d50dbec3 | 275 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 276 | |
0b402094 | 277 | if (socket->thread) |
1da9ab73 | 278 | kthread_stop(socket->thread); |
0b402094 | 279 | |
1da177e4 LT |
280 | /* remove from our own list */ |
281 | down_write(&pcmcia_socket_list_rwsem); | |
282 | list_del(&socket->socket_list); | |
283 | up_write(&pcmcia_socket_list_rwsem); | |
284 | ||
285 | /* wait for sysfs to drop all references */ | |
385ee871 DB |
286 | if (socket->resource_ops->exit) |
287 | socket->resource_ops->exit(socket); | |
1da177e4 LT |
288 | wait_for_completion(&socket->socket_released); |
289 | } /* pcmcia_unregister_socket */ | |
290 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
291 | ||
292 | ||
9fea84f4 | 293 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
294 | { |
295 | struct pcmcia_socket *s; | |
296 | ||
297 | down_read(&pcmcia_socket_list_rwsem); | |
298 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
299 | if (s->sock == nr) { | |
300 | up_read(&pcmcia_socket_list_rwsem); | |
301 | return s; | |
302 | } | |
303 | up_read(&pcmcia_socket_list_rwsem); | |
304 | ||
305 | return NULL; | |
306 | ||
307 | } | |
308 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
309 | ||
78187865 | 310 | /* |
33519ddd DB |
311 | * The central event handler. Send_event() sends an event to the |
312 | * 16-bit subsystem, which then calls the relevant device drivers. | |
313 | * Parse_events() interprets the event bits from | |
314 | * a card status change report. Do_shutdown() handles the high | |
315 | * priority stuff associated with a card removal. | |
316 | */ | |
1da177e4 LT |
317 | |
318 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
319 | ||
320 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
321 | { | |
322 | int ret; | |
323 | ||
88b060d6 | 324 | if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL)) |
1da177e4 LT |
325 | return 0; |
326 | ||
d50dbec3 | 327 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
328 | event, priority, s->callback); |
329 | ||
330 | if (!s->callback) | |
331 | return 0; | |
332 | if (!try_module_get(s->callback->owner)) | |
333 | return 0; | |
334 | ||
335 | ret = s->callback->event(s, event, priority); | |
336 | ||
337 | module_put(s->callback->owner); | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
1da177e4 LT |
342 | static int socket_reset(struct pcmcia_socket *skt) |
343 | { | |
344 | int status, i; | |
345 | ||
d50dbec3 | 346 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
347 | |
348 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
349 | skt->ops->set_socket(skt, &skt->socket); | |
350 | udelay((long)reset_time); | |
351 | ||
352 | skt->socket.flags &= ~SS_RESET; | |
353 | skt->ops->set_socket(skt, &skt->socket); | |
354 | ||
355 | msleep(unreset_delay * 10); | |
356 | for (i = 0; i < unreset_limit; i++) { | |
357 | skt->ops->get_status(skt, &status); | |
358 | ||
359 | if (!(status & SS_DETECT)) | |
3939c1ef | 360 | return -ENODEV; |
1da177e4 LT |
361 | |
362 | if (status & SS_READY) | |
4c89e88b | 363 | return 0; |
1da177e4 LT |
364 | |
365 | msleep(unreset_check * 10); | |
366 | } | |
367 | ||
d50dbec3 | 368 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 369 | return -ETIMEDOUT; |
1da177e4 LT |
370 | } |
371 | ||
78187865 | 372 | /* |
6e493882 DR |
373 | * socket_setup() and socket_shutdown() are called by the main event handler |
374 | * when card insertion and removal events are received. | |
375 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
376 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
377 | */ | |
378 | static void socket_shutdown(struct pcmcia_socket *s) | |
379 | { | |
380 | int status; | |
381 | ||
d50dbec3 | 382 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 383 | |
88b060d6 | 384 | send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
6e493882 DR |
385 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
386 | msleep(shutdown_delay * 10); | |
387 | s->state &= SOCKET_INUSE; | |
388 | ||
389 | /* Blank out the socket state */ | |
390 | s->socket = dead_socket; | |
391 | s->ops->init(s); | |
392 | s->ops->set_socket(s, &s->socket); | |
393 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
394 | s->lock_count = 0; | |
904e3777 DB |
395 | kfree(s->fake_cis); |
396 | s->fake_cis = NULL; | |
6e493882 DR |
397 | #ifdef CONFIG_CARDBUS |
398 | cb_free(s); | |
399 | #endif | |
400 | s->functions = 0; | |
6e493882 | 401 | |
afb2c165 DR |
402 | /* give socket some time to power down */ |
403 | msleep(100); | |
404 | ||
6e493882 DR |
405 | s->ops->get_status(s, &status); |
406 | if (status & SS_POWERON) { | |
2e55bf6b DB |
407 | dev_printk(KERN_ERR, &s->dev, |
408 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
409 | } |
410 | ||
3970dd8c | 411 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
412 | } |
413 | ||
1da177e4 LT |
414 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
415 | { | |
416 | int status, i; | |
417 | ||
d50dbec3 | 418 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
419 | |
420 | skt->ops->get_status(skt, &status); | |
421 | if (!(status & SS_DETECT)) | |
3939c1ef | 422 | return -ENODEV; |
1da177e4 LT |
423 | |
424 | msleep(initial_delay * 10); | |
425 | ||
426 | for (i = 0; i < 100; i++) { | |
427 | skt->ops->get_status(skt, &status); | |
428 | if (!(status & SS_DETECT)) | |
3939c1ef | 429 | return -ENODEV; |
1da177e4 LT |
430 | |
431 | if (!(status & SS_PENDING)) | |
432 | break; | |
433 | ||
434 | msleep(100); | |
435 | } | |
436 | ||
437 | if (status & SS_PENDING) { | |
d50dbec3 DB |
438 | dev_printk(KERN_ERR, &skt->dev, |
439 | "voltage interrogation timed out.\n"); | |
8567142e | 440 | return -ETIMEDOUT; |
1da177e4 LT |
441 | } |
442 | ||
443 | if (status & SS_CARDBUS) { | |
5bc6b68a | 444 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
445 | dev_printk(KERN_ERR, &skt->dev, |
446 | "cardbus cards are not supported.\n"); | |
610e2374 | 447 | return -EINVAL; |
5bc6b68a | 448 | } |
1da177e4 | 449 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
450 | } else |
451 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
452 | |
453 | /* | |
454 | * Decode the card voltage requirements, and apply power to the card. | |
455 | */ | |
456 | if (status & SS_3VCARD) | |
457 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
458 | else if (!(status & SS_XVCARD)) | |
459 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
460 | else { | |
d50dbec3 | 461 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 462 | return -EIO; |
1da177e4 | 463 | } |
fa912bcb DR |
464 | |
465 | if (skt->power_hook) | |
466 | skt->power_hook(skt, HOOK_POWER_PRE); | |
467 | ||
1da177e4 LT |
468 | skt->socket.flags = 0; |
469 | skt->ops->set_socket(skt, &skt->socket); | |
470 | ||
471 | /* | |
472 | * Wait "vcc_settle" for the supply to stabilise. | |
473 | */ | |
474 | msleep(vcc_settle * 10); | |
475 | ||
476 | skt->ops->get_status(skt, &status); | |
477 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 478 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 479 | return -EIO; |
1da177e4 LT |
480 | } |
481 | ||
fa912bcb DR |
482 | status = socket_reset(skt); |
483 | ||
484 | if (skt->power_hook) | |
485 | skt->power_hook(skt, HOOK_POWER_POST); | |
486 | ||
487 | return status; | |
1da177e4 LT |
488 | } |
489 | ||
490 | /* | |
491 | * Handle card insertion. Setup the socket, reset the card, | |
492 | * and then tell the rest of PCMCIA that a card is present. | |
493 | */ | |
494 | static int socket_insert(struct pcmcia_socket *skt) | |
495 | { | |
496 | int ret; | |
497 | ||
d50dbec3 | 498 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 499 | |
3970dd8c DB |
500 | WARN_ON(skt->state & SOCKET_INUSE); |
501 | skt->state |= SOCKET_INUSE; | |
1da177e4 LT |
502 | |
503 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 504 | if (ret == 0) { |
1da177e4 | 505 | skt->state |= SOCKET_PRESENT; |
807277cb | 506 | |
2e55bf6b DB |
507 | dev_printk(KERN_NOTICE, &skt->dev, |
508 | "pccard: %s card inserted into slot %d\n", | |
509 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
510 | skt->sock); | |
807277cb | 511 | |
1da177e4 LT |
512 | #ifdef CONFIG_CARDBUS |
513 | if (skt->state & SOCKET_CARDBUS) { | |
514 | cb_alloc(skt); | |
515 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
516 | } | |
517 | #endif | |
d50dbec3 | 518 | dev_dbg(&skt->dev, "insert done\n"); |
1da177e4 LT |
519 | |
520 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
521 | } else { | |
522 | socket_shutdown(skt); | |
1da177e4 LT |
523 | } |
524 | ||
525 | return ret; | |
526 | } | |
527 | ||
528 | static int socket_suspend(struct pcmcia_socket *skt) | |
529 | { | |
530 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 531 | return -EBUSY; |
1da177e4 | 532 | |
88b060d6 DB |
533 | skt->suspended_state = skt->state; |
534 | ||
1da177e4 LT |
535 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); |
536 | skt->socket = dead_socket; | |
537 | skt->ops->set_socket(skt, &skt->socket); | |
538 | if (skt->ops->suspend) | |
539 | skt->ops->suspend(skt); | |
540 | skt->state |= SOCKET_SUSPEND; | |
541 | ||
4c89e88b | 542 | return 0; |
1da177e4 LT |
543 | } |
544 | ||
9905d1b4 | 545 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 546 | { |
1da177e4 LT |
547 | skt->socket = dead_socket; |
548 | skt->ops->init(skt); | |
549 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
550 | if (skt->state & SOCKET_PRESENT) |
551 | skt->resume_status = socket_setup(skt, resume_delay); | |
552 | return 0; | |
553 | } | |
1da177e4 | 554 | |
9905d1b4 RW |
555 | static int socket_late_resume(struct pcmcia_socket *skt) |
556 | { | |
88b060d6 DB |
557 | skt->state &= ~SOCKET_SUSPEND; |
558 | ||
559 | if (!(skt->state & SOCKET_PRESENT)) | |
1da177e4 | 560 | return socket_insert(skt); |
88b060d6 DB |
561 | |
562 | if (skt->resume_status) { | |
563 | socket_shutdown(skt); | |
564 | return 0; | |
1da177e4 LT |
565 | } |
566 | ||
88b060d6 DB |
567 | if (skt->suspended_state != skt->state) { |
568 | dev_dbg(&skt->dev, | |
569 | "suspend state 0x%x != resume state 0x%x\n", | |
570 | skt->suspended_state, skt->state); | |
571 | ||
1da177e4 | 572 | socket_shutdown(skt); |
88b060d6 | 573 | return socket_insert(skt); |
1da177e4 LT |
574 | } |
575 | ||
88b060d6 DB |
576 | #ifdef CONFIG_CARDBUS |
577 | if (skt->state & SOCKET_CARDBUS) { | |
578 | /* We can't be sure the CardBus card is the same | |
579 | * as the one previously inserted. Therefore, remove | |
580 | * and re-add... */ | |
581 | cb_free(skt); | |
582 | cb_alloc(skt); | |
583 | return 0; | |
584 | } | |
585 | #endif | |
1da177e4 | 586 | |
88b060d6 | 587 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
4c89e88b | 588 | return 0; |
1da177e4 LT |
589 | } |
590 | ||
9905d1b4 RW |
591 | /* |
592 | * Resume a socket. If a card is present, verify its CIS against | |
593 | * our cached copy. If they are different, the card has been | |
594 | * replaced, and we need to tell the drivers. | |
595 | */ | |
596 | static int socket_resume(struct pcmcia_socket *skt) | |
597 | { | |
598 | if (!(skt->state & SOCKET_SUSPEND)) | |
599 | return -EBUSY; | |
600 | ||
601 | socket_early_resume(skt); | |
602 | return socket_late_resume(skt); | |
603 | } | |
604 | ||
1da177e4 LT |
605 | static void socket_remove(struct pcmcia_socket *skt) |
606 | { | |
2e55bf6b DB |
607 | dev_printk(KERN_NOTICE, &skt->dev, |
608 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 609 | socket_shutdown(skt); |
1da177e4 LT |
610 | } |
611 | ||
612 | /* | |
613 | * Process a socket card detect status change. | |
614 | * | |
615 | * If we don't have a card already present, delay the detect event for | |
616 | * about 20ms (to be on the safe side) before reading the socket status. | |
617 | * | |
618 | * Some i82365-based systems send multiple SS_DETECT events during card | |
619 | * insertion, and the "card present" status bit seems to bounce. This | |
620 | * will probably be true with GPIO-based card detection systems after | |
621 | * the product has aged. | |
622 | */ | |
623 | static void socket_detect_change(struct pcmcia_socket *skt) | |
624 | { | |
625 | if (!(skt->state & SOCKET_SUSPEND)) { | |
626 | int status; | |
627 | ||
628 | if (!(skt->state & SOCKET_PRESENT)) | |
629 | msleep(20); | |
630 | ||
631 | skt->ops->get_status(skt, &status); | |
632 | if ((skt->state & SOCKET_PRESENT) && | |
633 | !(status & SS_DETECT)) | |
634 | socket_remove(skt); | |
635 | if (!(skt->state & SOCKET_PRESENT) && | |
636 | (status & SS_DETECT)) | |
637 | socket_insert(skt); | |
638 | } | |
639 | } | |
640 | ||
641 | static int pccardd(void *__skt) | |
642 | { | |
643 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
644 | int ret; |
645 | ||
1da177e4 LT |
646 | skt->thread = current; |
647 | skt->socket = dead_socket; | |
648 | skt->ops->init(skt); | |
649 | skt->ops->set_socket(skt, &skt->socket); | |
650 | ||
651 | /* register with the device core */ | |
87373318 | 652 | ret = device_register(&skt->dev); |
1da177e4 | 653 | if (ret) { |
2e55bf6b DB |
654 | dev_printk(KERN_WARNING, &skt->dev, |
655 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 656 | skt->thread = NULL; |
1da9ab73 SH |
657 | complete(&skt->thread_done); |
658 | return 0; | |
1da177e4 | 659 | } |
4356d73d DB |
660 | ret = pccard_sysfs_add_socket(&skt->dev); |
661 | if (ret) | |
662 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 663 | |
bf4de6f2 DR |
664 | complete(&skt->thread_done); |
665 | ||
83144186 | 666 | set_freezable(); |
1da177e4 LT |
667 | for (;;) { |
668 | unsigned long flags; | |
669 | unsigned int events; | |
670 | ||
671 | set_current_state(TASK_INTERRUPTIBLE); | |
672 | ||
673 | spin_lock_irqsave(&skt->thread_lock, flags); | |
674 | events = skt->thread_events; | |
675 | skt->thread_events = 0; | |
676 | spin_unlock_irqrestore(&skt->thread_lock, flags); | |
677 | ||
678 | if (events) { | |
7fe908dd | 679 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
680 | if (events & SS_DETECT) |
681 | socket_detect_change(skt); | |
682 | if (events & SS_BATDEAD) | |
683 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
684 | if (events & SS_BATWARN) | |
685 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
686 | if (events & SS_READY) | |
687 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
7fe908dd | 688 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
689 | continue; |
690 | } | |
691 | ||
1da9ab73 | 692 | if (kthread_should_stop()) |
1da177e4 | 693 | break; |
bf4de6f2 DR |
694 | |
695 | schedule(); | |
696 | try_to_freeze(); | |
1da177e4 | 697 | } |
220ec029 SR |
698 | /* make sure we are running before we exit */ |
699 | set_current_state(TASK_RUNNING); | |
700 | ||
3970dd8c DB |
701 | /* shut down socket, if a device is still present */ |
702 | if (skt->state & SOCKET_PRESENT) { | |
703 | mutex_lock(&skt->skt_mutex); | |
704 | socket_remove(skt); | |
705 | mutex_unlock(&skt->skt_mutex); | |
706 | } | |
707 | ||
1da177e4 | 708 | /* remove from the device core */ |
4356d73d | 709 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 710 | device_unregister(&skt->dev); |
1da177e4 | 711 | |
1da9ab73 | 712 | return 0; |
1da177e4 LT |
713 | } |
714 | ||
715 | /* | |
716 | * Yenta (at least) probes interrupts before registering the socket and | |
717 | * starting the handler thread. | |
718 | */ | |
719 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
720 | { | |
4b7a89a3 | 721 | unsigned long flags; |
d50dbec3 | 722 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 723 | if (s->thread) { |
4b7a89a3 | 724 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 725 | s->thread_events |= events; |
4b7a89a3 | 726 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 727 | |
0b402094 | 728 | wake_up_process(s->thread); |
1da177e4 LT |
729 | } |
730 | } /* pcmcia_parse_events */ | |
33519ddd | 731 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 732 | |
1da177e4 LT |
733 | |
734 | /* register pcmcia_callback */ | |
735 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
736 | { | |
9fea84f4 | 737 | int ret = 0; |
1da177e4 | 738 | |
7fe908dd DB |
739 | /* s->skt_mutex also protects s->callback */ |
740 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
741 | |
742 | if (c) { | |
743 | /* registration */ | |
744 | if (s->callback) { | |
745 | ret = -EBUSY; | |
746 | goto err; | |
747 | } | |
748 | ||
749 | s->callback = c; | |
750 | ||
751 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
752 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
753 | } else | |
754 | s->callback = NULL; | |
755 | err: | |
7fe908dd | 756 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
757 | |
758 | return ret; | |
759 | } | |
760 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
761 | ||
1da177e4 | 762 | |
33519ddd DB |
763 | /* I'm not sure which "reset" function this is supposed to use, |
764 | * but for now, it uses the low-level interface's reset, not the | |
765 | * CIS register. | |
766 | */ | |
1da177e4 | 767 | |
994917f8 | 768 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
769 | { |
770 | int ret; | |
33519ddd | 771 | |
d50dbec3 | 772 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 773 | |
7fe908dd | 774 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
775 | do { |
776 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 777 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 778 | ret = -ENODEV; |
1da177e4 LT |
779 | break; |
780 | } | |
781 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 782 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 783 | ret = -EBUSY; |
1da177e4 LT |
784 | break; |
785 | } | |
786 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 787 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 788 | ret = -EPERM; |
1da177e4 LT |
789 | break; |
790 | } | |
791 | ||
792 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
793 | if (ret == 0) { | |
794 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
795 | if (skt->callback) |
796 | skt->callback->suspend(skt); | |
4c89e88b | 797 | if (socket_reset(skt) == 0) { |
1da177e4 | 798 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
799 | if (skt->callback) |
800 | skt->callback->resume(skt); | |
801 | } | |
1da177e4 LT |
802 | } |
803 | ||
4c89e88b | 804 | ret = 0; |
1da177e4 | 805 | } while (0); |
7fe908dd | 806 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
807 | |
808 | return ret; | |
809 | } /* reset_card */ | |
994917f8 | 810 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 811 | |
1da177e4 | 812 | |
33519ddd DB |
813 | /* These shut down or wake up a socket. They are sort of user |
814 | * initiated versions of the APM suspend and resume actions. | |
815 | */ | |
1da177e4 LT |
816 | int pcmcia_suspend_card(struct pcmcia_socket *skt) |
817 | { | |
818 | int ret; | |
33519ddd | 819 | |
d50dbec3 | 820 | dev_dbg(&skt->dev, "suspending socket\n"); |
1da177e4 | 821 | |
7fe908dd | 822 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
823 | do { |
824 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 825 | ret = -ENODEV; |
1da177e4 LT |
826 | break; |
827 | } | |
828 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 829 | ret = -EPERM; |
1da177e4 LT |
830 | break; |
831 | } | |
8e9e793d DB |
832 | if (skt->callback) { |
833 | ret = skt->callback->suspend(skt); | |
834 | if (ret) | |
835 | break; | |
836 | } | |
1da177e4 LT |
837 | ret = socket_suspend(skt); |
838 | } while (0); | |
7fe908dd | 839 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
840 | |
841 | return ret; | |
842 | } /* suspend_card */ | |
33519ddd DB |
843 | EXPORT_SYMBOL(pcmcia_suspend_card); |
844 | ||
1da177e4 LT |
845 | |
846 | int pcmcia_resume_card(struct pcmcia_socket *skt) | |
847 | { | |
848 | int ret; | |
9fea84f4 | 849 | |
d50dbec3 | 850 | dev_dbg(&skt->dev, "waking up socket\n"); |
1da177e4 | 851 | |
7fe908dd | 852 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
853 | do { |
854 | if (!(skt->state & SOCKET_PRESENT)) { | |
3939c1ef | 855 | ret = -ENODEV; |
1da177e4 LT |
856 | break; |
857 | } | |
858 | if (skt->state & SOCKET_CARDBUS) { | |
de6405e9 | 859 | ret = -EPERM; |
1da177e4 LT |
860 | break; |
861 | } | |
862 | ret = socket_resume(skt); | |
8e9e793d DB |
863 | if (!ret && skt->callback) |
864 | skt->callback->resume(skt); | |
1da177e4 | 865 | } while (0); |
7fe908dd | 866 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
867 | |
868 | return ret; | |
869 | } /* resume_card */ | |
33519ddd | 870 | EXPORT_SYMBOL(pcmcia_resume_card); |
1da177e4 | 871 | |
1da177e4 | 872 | |
33519ddd | 873 | /* These handle user requests to eject or insert a card. */ |
1da177e4 LT |
874 | int pcmcia_eject_card(struct pcmcia_socket *skt) |
875 | { | |
876 | int ret; | |
9fea84f4 | 877 | |
d50dbec3 | 878 | dev_dbg(&skt->dev, "user eject request\n"); |
1da177e4 | 879 | |
7fe908dd | 880 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
881 | do { |
882 | if (!(skt->state & SOCKET_PRESENT)) { | |
883 | ret = -ENODEV; | |
884 | break; | |
885 | } | |
886 | ||
887 | ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW); | |
888 | if (ret != 0) { | |
889 | ret = -EINVAL; | |
890 | break; | |
891 | } | |
892 | ||
893 | socket_remove(skt); | |
894 | ret = 0; | |
895 | } while (0); | |
7fe908dd | 896 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
897 | |
898 | return ret; | |
899 | } /* eject_card */ | |
33519ddd DB |
900 | EXPORT_SYMBOL(pcmcia_eject_card); |
901 | ||
1da177e4 LT |
902 | |
903 | int pcmcia_insert_card(struct pcmcia_socket *skt) | |
904 | { | |
905 | int ret; | |
906 | ||
d50dbec3 | 907 | dev_dbg(&skt->dev, "user insert request\n"); |
1da177e4 | 908 | |
7fe908dd | 909 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
910 | do { |
911 | if (skt->state & SOCKET_PRESENT) { | |
912 | ret = -EBUSY; | |
913 | break; | |
914 | } | |
3939c1ef | 915 | if (socket_insert(skt) == -ENODEV) { |
1da177e4 LT |
916 | ret = -ENODEV; |
917 | break; | |
918 | } | |
919 | ret = 0; | |
920 | } while (0); | |
7fe908dd | 921 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
922 | |
923 | return ret; | |
924 | } /* insert_card */ | |
33519ddd DB |
925 | EXPORT_SYMBOL(pcmcia_insert_card); |
926 | ||
1da177e4 | 927 | |
7eff2e7a KS |
928 | static int pcmcia_socket_uevent(struct device *dev, |
929 | struct kobj_uevent_env *env) | |
3ee13937 DB |
930 | { |
931 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 932 | |
7eff2e7a | 933 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
934 | return -ENOMEM; |
935 | ||
3ee13937 DB |
936 | return 0; |
937 | } | |
938 | ||
1da177e4 | 939 | |
378a33a6 DB |
940 | static struct completion pcmcia_unload; |
941 | ||
942 | static void pcmcia_release_socket_class(struct class *data) | |
943 | { | |
944 | complete(&pcmcia_unload); | |
945 | } | |
946 | ||
947 | ||
1da177e4 LT |
948 | struct class pcmcia_socket_class = { |
949 | .name = "pcmcia_socket", | |
87373318 GKH |
950 | .dev_uevent = pcmcia_socket_uevent, |
951 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 952 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
953 | }; |
954 | EXPORT_SYMBOL(pcmcia_socket_class); | |
955 | ||
956 | ||
957 | static int __init init_pcmcia_cs(void) | |
958 | { | |
378a33a6 | 959 | init_completion(&pcmcia_unload); |
4356d73d | 960 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
961 | } |
962 | ||
963 | static void __exit exit_pcmcia_cs(void) | |
964 | { | |
33519ddd | 965 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 966 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
967 | } |
968 | ||
969 | subsys_initcall(init_pcmcia_cs); | |
970 | module_exit(exit_pcmcia_cs); | |
971 |