blob: 50cad3a59a6c236696276bfd2a160cd00d770c17 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/device.h>
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -050030#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080031#include <linux/freezer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/system.h>
33#include <asm/irq.h>
34
35#define IN_CARD_SERVICES
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <pcmcia/cs_types.h>
37#include <pcmcia/ss.h>
38#include <pcmcia/cs.h>
39#include <pcmcia/bulkmem.h>
40#include <pcmcia/cistpl.h>
41#include <pcmcia/cisreg.h>
42#include <pcmcia/ds.h>
43#include "cs_internal.h"
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46/* Module parameters */
47
48MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
Dominik Brodowski33519dd2005-06-27 16:28:53 -070049MODULE_DESCRIPTION("Linux Kernel Card Services");
Linus Torvalds1da177e2005-04-16 15:20:36 -070050MODULE_LICENSE("GPL");
51
52#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
53
54INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
55INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
56INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
57INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
58INT_MODULE_PARM(reset_time, 10); /* usecs */
59INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
60INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
61INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
62
63/* Access speed for attribute memory windows */
64INT_MODULE_PARM(cis_speed, 300); /* ns */
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#ifdef DEBUG
67static int pc_debug;
68
69module_param(pc_debug, int, 0644);
70
71int cs_debug_level(int level)
72{
73 return pc_debug > level;
74}
75#endif
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78socket_state_t dead_socket = {
79 .csc_mask = SS_DETECT,
80};
Dominik Brodowski33519dd2005-06-27 16:28:53 -070081EXPORT_SYMBOL(dead_socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83
84/* List of all sockets, protected by a rwsem */
85LIST_HEAD(pcmcia_socket_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086EXPORT_SYMBOL(pcmcia_socket_list);
Dominik Brodowski33519dd2005-06-27 16:28:53 -070087
88DECLARE_RWSEM(pcmcia_socket_list_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
90
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092/**
Dominik Brodowski33519dd2005-06-27 16:28:53 -070093 * Low-level PCMCIA socket drivers need to register with the PCCard
94 * core using pcmcia_register_socket.
95 *
96 * socket drivers are expected to use the following callbacks in their
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 * .drv struct:
98 * - pcmcia_socket_dev_suspend
99 * - pcmcia_socket_dev_resume
100 * These functions check for the appropriate struct pcmcia_soket arrays,
101 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
102 */
103static int socket_resume(struct pcmcia_socket *skt);
104static int socket_suspend(struct pcmcia_socket *skt);
105
106int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state)
107{
108 struct pcmcia_socket *socket;
109
110 down_read(&pcmcia_socket_list_rwsem);
111 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200112 if (socket->dev.parent != dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 continue;
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100114 mutex_lock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 socket_suspend(socket);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100116 mutex_unlock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 }
118 up_read(&pcmcia_socket_list_rwsem);
119
120 return 0;
121}
122EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
123
124int pcmcia_socket_dev_resume(struct device *dev)
125{
126 struct pcmcia_socket *socket;
127
128 down_read(&pcmcia_socket_list_rwsem);
129 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200130 if (socket->dev.parent != dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 continue;
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100132 mutex_lock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 socket_resume(socket);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100134 mutex_unlock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 }
136 up_read(&pcmcia_socket_list_rwsem);
137
138 return 0;
139}
140EXPORT_SYMBOL(pcmcia_socket_dev_resume);
141
142
143struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
144{
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200145 struct device *dev = get_device(&skt->dev);
146 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 return NULL;
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200148 skt = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 if (!try_module_get(skt->owner)) {
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200150 put_device(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 return NULL;
152 }
153 return (skt);
154}
155EXPORT_SYMBOL(pcmcia_get_socket);
156
157
158void pcmcia_put_socket(struct pcmcia_socket *skt)
159{
160 module_put(skt->owner);
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200161 put_device(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
163EXPORT_SYMBOL(pcmcia_put_socket);
164
165
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200166static void pcmcia_release_socket(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200168 struct pcmcia_socket *socket = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 complete(&socket->socket_released);
171}
172
173static int pccardd(void *__skt);
174
175/**
176 * pcmcia_register_socket - add a new pcmcia socket device
177 */
178int pcmcia_register_socket(struct pcmcia_socket *socket)
179{
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500180 struct task_struct *tsk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 int ret;
182
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200183 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return -EINVAL;
185
186 cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
187
188 spin_lock_init(&socket->lock);
189
190 if (socket->resource_ops->init) {
191 ret = socket->resource_ops->init(socket);
192 if (ret)
193 return (ret);
194 }
195
196 /* try to obtain a socket number [yes, it gets ugly if we
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700197 * register more than 2^sizeof(unsigned int) pcmcia
198 * sockets... but the socket number is deprecated
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 * anyways, so I don't care] */
200 down_write(&pcmcia_socket_list_rwsem);
201 if (list_empty(&pcmcia_socket_list))
202 socket->sock = 0;
203 else {
204 unsigned int found, i = 1;
205 struct pcmcia_socket *tmp;
206 do {
207 found = 1;
208 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
209 if (tmp->sock == i)
210 found = 0;
211 }
212 i++;
213 } while (!found);
214 socket->sock = i - 1;
215 }
216 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
217 up_write(&pcmcia_socket_list_rwsem);
218
Russell King5bc6b682005-07-07 17:59:07 -0700219#ifndef CONFIG_CARDBUS
220 /*
221 * If we do not support Cardbus, ensure that
222 * the Cardbus socket capability is disabled.
223 */
224 socket->features &= ~SS_CAP_CARDBUS;
225#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 /* set proper values in socket->dev */
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200228 dev_set_drvdata(&socket->dev, socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 socket->dev.class = &pcmcia_socket_class;
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200230 snprintf(socket->dev.bus_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 /* base address = 0, map = 0 */
233 socket->cis_mem.flags = 0;
234 socket->cis_mem.speed = cis_speed;
235
236 INIT_LIST_HEAD(&socket->cis_cache);
237
238 init_completion(&socket->socket_released);
239 init_completion(&socket->thread_done);
240 init_waitqueue_head(&socket->thread_wait);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100241 mutex_init(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 spin_lock_init(&socket->thread_lock);
243
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500244 tsk = kthread_run(pccardd, socket, "pccardd");
245 if (IS_ERR(tsk)) {
246 ret = PTR_ERR(tsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 goto err;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
250 wait_for_completion(&socket->thread_done);
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500251 if (!socket->thread) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket);
253 return -EIO;
254 }
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 pcmcia_parse_events(socket, SS_DETECT);
257
258 return 0;
259
260 err:
261 down_write(&pcmcia_socket_list_rwsem);
262 list_del(&socket->socket_list);
263 up_write(&pcmcia_socket_list_rwsem);
264 return ret;
265} /* pcmcia_register_socket */
266EXPORT_SYMBOL(pcmcia_register_socket);
267
268
269/**
270 * pcmcia_unregister_socket - remove a pcmcia socket device
271 */
272void pcmcia_unregister_socket(struct pcmcia_socket *socket)
273{
274 if (!socket)
275 return;
276
277 cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
278
279 if (socket->thread) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 wake_up(&socket->thread_wait);
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500281 kthread_stop(socket->thread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
283 release_cis_mem(socket);
284
285 /* remove from our own list */
286 down_write(&pcmcia_socket_list_rwsem);
287 list_del(&socket->socket_list);
288 up_write(&pcmcia_socket_list_rwsem);
289
290 /* wait for sysfs to drop all references */
291 release_resource_db(socket);
292 wait_for_completion(&socket->socket_released);
293} /* pcmcia_unregister_socket */
294EXPORT_SYMBOL(pcmcia_unregister_socket);
295
296
297struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
298{
299 struct pcmcia_socket *s;
300
301 down_read(&pcmcia_socket_list_rwsem);
302 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
303 if (s->sock == nr) {
304 up_read(&pcmcia_socket_list_rwsem);
305 return s;
306 }
307 up_read(&pcmcia_socket_list_rwsem);
308
309 return NULL;
310
311}
312EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
313
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700314/**
315 * The central event handler. Send_event() sends an event to the
316 * 16-bit subsystem, which then calls the relevant device drivers.
317 * Parse_events() interprets the event bits from
318 * a card status change report. Do_shutdown() handles the high
319 * priority stuff associated with a card removal.
320 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322/* NOTE: send_event needs to be called with skt->sem held. */
323
324static int send_event(struct pcmcia_socket *s, event_t event, int priority)
325{
326 int ret;
327
328 if (s->state & SOCKET_CARDBUS)
329 return 0;
330
331 cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
332 event, priority, s->callback);
333
334 if (!s->callback)
335 return 0;
336 if (!try_module_get(s->callback->owner))
337 return 0;
338
339 ret = s->callback->event(s, event, priority);
340
341 module_put(s->callback->owner);
342
343 return ret;
344}
345
346static void socket_remove_drivers(struct pcmcia_socket *skt)
347{
348 cs_dbg(skt, 4, "remove_drivers\n");
349
350 send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
351}
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353static int socket_reset(struct pcmcia_socket *skt)
354{
355 int status, i;
356
357 cs_dbg(skt, 4, "reset\n");
358
359 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
360 skt->ops->set_socket(skt, &skt->socket);
361 udelay((long)reset_time);
362
363 skt->socket.flags &= ~SS_RESET;
364 skt->ops->set_socket(skt, &skt->socket);
365
366 msleep(unreset_delay * 10);
367 for (i = 0; i < unreset_limit; i++) {
368 skt->ops->get_status(skt, &status);
369
370 if (!(status & SS_DETECT))
371 return CS_NO_CARD;
372
373 if (status & SS_READY)
374 return CS_SUCCESS;
375
376 msleep(unreset_check * 10);
377 }
378
379 cs_err(skt, "time out after reset.\n");
380 return CS_GENERAL_FAILURE;
381}
382
Daniel Ritz6e493882005-12-30 15:12:35 +0100383/**
384 * socket_setup() and socket_shutdown() are called by the main event handler
385 * when card insertion and removal events are received.
386 * socket_setup() turns on socket power and resets the socket, in two stages.
387 * socket_shutdown() unconfigures a socket and turns off socket power.
388 */
389static void socket_shutdown(struct pcmcia_socket *s)
390{
391 int status;
392
393 cs_dbg(s, 4, "shutdown\n");
394
395 socket_remove_drivers(s);
396 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
397 msleep(shutdown_delay * 10);
398 s->state &= SOCKET_INUSE;
399
400 /* Blank out the socket state */
401 s->socket = dead_socket;
402 s->ops->init(s);
403 s->ops->set_socket(s, &s->socket);
404 s->irq.AssignedIRQ = s->irq.Config = 0;
405 s->lock_count = 0;
406 destroy_cis_cache(s);
407#ifdef CONFIG_CARDBUS
408 cb_free(s);
409#endif
410 s->functions = 0;
Daniel Ritz6e493882005-12-30 15:12:35 +0100411
412 s->ops->get_status(s, &status);
413 if (status & SS_POWERON) {
414 printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
415 }
416
417 cs_socket_put(s);
418}
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
421{
422 int status, i;
423
424 cs_dbg(skt, 4, "setup\n");
425
426 skt->ops->get_status(skt, &status);
427 if (!(status & SS_DETECT))
428 return CS_NO_CARD;
429
430 msleep(initial_delay * 10);
431
432 for (i = 0; i < 100; i++) {
433 skt->ops->get_status(skt, &status);
434 if (!(status & SS_DETECT))
435 return CS_NO_CARD;
436
437 if (!(status & SS_PENDING))
438 break;
439
440 msleep(100);
441 }
442
443 if (status & SS_PENDING) {
444 cs_err(skt, "voltage interrogation timed out.\n");
445 return CS_GENERAL_FAILURE;
446 }
447
448 if (status & SS_CARDBUS) {
Russell King5bc6b682005-07-07 17:59:07 -0700449 if (!(skt->features & SS_CAP_CARDBUS)) {
450 cs_err(skt, "cardbus cards are not supported.\n");
451 return CS_BAD_TYPE;
452 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 skt->state |= SOCKET_CARDBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 }
455
456 /*
457 * Decode the card voltage requirements, and apply power to the card.
458 */
459 if (status & SS_3VCARD)
460 skt->socket.Vcc = skt->socket.Vpp = 33;
461 else if (!(status & SS_XVCARD))
462 skt->socket.Vcc = skt->socket.Vpp = 50;
463 else {
464 cs_err(skt, "unsupported voltage key.\n");
465 return CS_BAD_TYPE;
466 }
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700467
468 if (skt->power_hook)
469 skt->power_hook(skt, HOOK_POWER_PRE);
470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 skt->socket.flags = 0;
472 skt->ops->set_socket(skt, &skt->socket);
473
474 /*
475 * Wait "vcc_settle" for the supply to stabilise.
476 */
477 msleep(vcc_settle * 10);
478
479 skt->ops->get_status(skt, &status);
480 if (!(status & SS_POWERON)) {
481 cs_err(skt, "unable to apply power.\n");
482 return CS_BAD_TYPE;
483 }
484
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700485 status = socket_reset(skt);
486
487 if (skt->power_hook)
488 skt->power_hook(skt, HOOK_POWER_POST);
489
490 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491}
492
493/*
494 * Handle card insertion. Setup the socket, reset the card,
495 * and then tell the rest of PCMCIA that a card is present.
496 */
497static int socket_insert(struct pcmcia_socket *skt)
498{
499 int ret;
500
501 cs_dbg(skt, 4, "insert\n");
502
503 if (!cs_socket_get(skt))
504 return CS_NO_CARD;
505
506 ret = socket_setup(skt, setup_delay);
507 if (ret == CS_SUCCESS) {
508 skt->state |= SOCKET_PRESENT;
Dominik Brodowski807277c2005-11-12 23:34:06 +0100509
510 printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n",
511 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
512 skt->sock);
513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514#ifdef CONFIG_CARDBUS
515 if (skt->state & SOCKET_CARDBUS) {
516 cb_alloc(skt);
517 skt->state |= SOCKET_CARDBUS_CONFIG;
518 }
519#endif
520 cs_dbg(skt, 4, "insert done\n");
521
522 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
523 } else {
524 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 }
526
527 return ret;
528}
529
530static int socket_suspend(struct pcmcia_socket *skt)
531{
532 if (skt->state & SOCKET_SUSPEND)
533 return CS_IN_USE;
534
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
542 return CS_SUCCESS;
543}
544
545/*
546 * Resume a socket. If a card is present, verify its CIS against
547 * our cached copy. If they are different, the card has been
548 * replaced, and we need to tell the drivers.
549 */
550static int socket_resume(struct pcmcia_socket *skt)
551{
552 int ret;
553
554 if (!(skt->state & SOCKET_SUSPEND))
555 return CS_IN_USE;
556
557 skt->socket = dead_socket;
558 skt->ops->init(skt);
559 skt->ops->set_socket(skt, &skt->socket);
560
561 if (!(skt->state & SOCKET_PRESENT)) {
562 skt->state &= ~SOCKET_SUSPEND;
563 return socket_insert(skt);
564 }
565
566 ret = socket_setup(skt, resume_delay);
567 if (ret == CS_SUCCESS) {
568 /*
569 * FIXME: need a better check here for cardbus cards.
570 */
571 if (verify_cis_cache(skt) != 0) {
572 cs_dbg(skt, 4, "cis mismatch - different card\n");
573 socket_remove_drivers(skt);
574 destroy_cis_cache(skt);
575 /*
576 * Workaround: give DS time to schedule removal.
577 * Remove me once the 100ms delay is eliminated
578 * in ds.c
579 */
580 msleep(200);
581 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
582 } else {
583 cs_dbg(skt, 4, "cis matches cache\n");
584 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
585 }
586 } else {
587 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589
590 skt->state &= ~SOCKET_SUSPEND;
591
592 return CS_SUCCESS;
593}
594
595static void socket_remove(struct pcmcia_socket *skt)
596{
Dominik Brodowski807277c2005-11-12 23:34:06 +0100597 printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599}
600
601/*
602 * Process a socket card detect status change.
603 *
604 * If we don't have a card already present, delay the detect event for
605 * about 20ms (to be on the safe side) before reading the socket status.
606 *
607 * Some i82365-based systems send multiple SS_DETECT events during card
608 * insertion, and the "card present" status bit seems to bounce. This
609 * will probably be true with GPIO-based card detection systems after
610 * the product has aged.
611 */
612static void socket_detect_change(struct pcmcia_socket *skt)
613{
614 if (!(skt->state & SOCKET_SUSPEND)) {
615 int status;
616
617 if (!(skt->state & SOCKET_PRESENT))
618 msleep(20);
619
620 skt->ops->get_status(skt, &status);
621 if ((skt->state & SOCKET_PRESENT) &&
622 !(status & SS_DETECT))
623 socket_remove(skt);
624 if (!(skt->state & SOCKET_PRESENT) &&
625 (status & SS_DETECT))
626 socket_insert(skt);
627 }
628}
629
630static int pccardd(void *__skt)
631{
632 struct pcmcia_socket *skt = __skt;
633 DECLARE_WAITQUEUE(wait, current);
634 int ret;
635
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 skt->thread = current;
637 skt->socket = dead_socket;
638 skt->ops->init(skt);
639 skt->ops->set_socket(skt, &skt->socket);
640
641 /* register with the device core */
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200642 ret = device_register(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 if (ret) {
644 printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
645 skt);
646 skt->thread = NULL;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500647 complete(&skt->thread_done);
648 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
651 add_wait_queue(&skt->thread_wait, &wait);
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700652 complete(&skt->thread_done);
653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 for (;;) {
655 unsigned long flags;
656 unsigned int events;
657
658 set_current_state(TASK_INTERRUPTIBLE);
659
660 spin_lock_irqsave(&skt->thread_lock, flags);
661 events = skt->thread_events;
662 skt->thread_events = 0;
663 spin_unlock_irqrestore(&skt->thread_lock, flags);
664
665 if (events) {
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100666 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 if (events & SS_DETECT)
668 socket_detect_change(skt);
669 if (events & SS_BATDEAD)
670 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
671 if (events & SS_BATWARN)
672 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
673 if (events & SS_READY)
674 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100675 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 continue;
677 }
678
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500679 if (kthread_should_stop())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 break;
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700681
682 schedule();
683 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 }
Steven Rostedt220ec022005-10-10 11:13:17 -0400685 /* make sure we are running before we exit */
686 set_current_state(TASK_RUNNING);
687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 remove_wait_queue(&skt->thread_wait, &wait);
689
690 /* remove from the device core */
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200691 device_unregister(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500693 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694}
695
696/*
697 * Yenta (at least) probes interrupts before registering the socket and
698 * starting the handler thread.
699 */
700void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
701{
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200702 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 cs_dbg(s, 4, "parse_events: events %08x\n", events);
704 if (s->thread) {
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200705 spin_lock_irqsave(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 s->thread_events |= events;
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200707 spin_unlock_irqrestore(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
709 wake_up(&s->thread_wait);
710 }
711} /* pcmcia_parse_events */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700712EXPORT_SYMBOL(pcmcia_parse_events);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
715/* register pcmcia_callback */
716int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
717{
718 int ret = 0;
719
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100720 /* s->skt_mutex also protects s->callback */
721 mutex_lock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
723 if (c) {
724 /* registration */
725 if (s->callback) {
726 ret = -EBUSY;
727 goto err;
728 }
729
730 s->callback = c;
731
732 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
733 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
734 } else
735 s->callback = NULL;
736 err:
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100737 mutex_unlock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
739 return ret;
740}
741EXPORT_SYMBOL(pccard_register_pcmcia);
742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700744/* I'm not sure which "reset" function this is supposed to use,
745 * but for now, it uses the low-level interface's reset, not the
746 * CIS register.
747 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749int pccard_reset_card(struct pcmcia_socket *skt)
750{
751 int ret;
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 cs_dbg(skt, 1, "resetting socket\n");
754
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100755 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 do {
757 if (!(skt->state & SOCKET_PRESENT)) {
758 ret = CS_NO_CARD;
759 break;
760 }
761 if (skt->state & SOCKET_SUSPEND) {
762 ret = CS_IN_USE;
763 break;
764 }
765 if (skt->state & SOCKET_CARDBUS) {
766 ret = CS_UNSUPPORTED_FUNCTION;
767 break;
768 }
769
770 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
771 if (ret == 0) {
772 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100773 if (skt->callback)
774 skt->callback->suspend(skt);
775 if (socket_reset(skt) == CS_SUCCESS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100777 if (skt->callback)
778 skt->callback->resume(skt);
779 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 }
781
782 ret = CS_SUCCESS;
783 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100784 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
786 return ret;
787} /* reset_card */
788EXPORT_SYMBOL(pccard_reset_card);
789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700791/* These shut down or wake up a socket. They are sort of user
792 * initiated versions of the APM suspend and resume actions.
793 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794int pcmcia_suspend_card(struct pcmcia_socket *skt)
795{
796 int ret;
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 cs_dbg(skt, 1, "suspending socket\n");
799
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100800 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 do {
802 if (!(skt->state & SOCKET_PRESENT)) {
803 ret = CS_NO_CARD;
804 break;
805 }
806 if (skt->state & SOCKET_CARDBUS) {
807 ret = CS_UNSUPPORTED_FUNCTION;
808 break;
809 }
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100810 if (skt->callback) {
811 ret = skt->callback->suspend(skt);
812 if (ret)
813 break;
814 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 ret = socket_suspend(skt);
816 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100817 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 return ret;
820} /* suspend_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700821EXPORT_SYMBOL(pcmcia_suspend_card);
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824int pcmcia_resume_card(struct pcmcia_socket *skt)
825{
826 int ret;
827
828 cs_dbg(skt, 1, "waking up socket\n");
829
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100830 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 do {
832 if (!(skt->state & SOCKET_PRESENT)) {
833 ret = CS_NO_CARD;
834 break;
835 }
836 if (skt->state & SOCKET_CARDBUS) {
837 ret = CS_UNSUPPORTED_FUNCTION;
838 break;
839 }
840 ret = socket_resume(skt);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100841 if (!ret && skt->callback)
842 skt->callback->resume(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100844 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846 return ret;
847} /* resume_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700848EXPORT_SYMBOL(pcmcia_resume_card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700851/* These handle user requests to eject or insert a card. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852int pcmcia_eject_card(struct pcmcia_socket *skt)
853{
854 int ret;
855
856 cs_dbg(skt, 1, "user eject request\n");
857
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100858 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 do {
860 if (!(skt->state & SOCKET_PRESENT)) {
861 ret = -ENODEV;
862 break;
863 }
864
865 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
866 if (ret != 0) {
867 ret = -EINVAL;
868 break;
869 }
870
871 socket_remove(skt);
872 ret = 0;
873 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100874 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
876 return ret;
877} /* eject_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700878EXPORT_SYMBOL(pcmcia_eject_card);
879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881int pcmcia_insert_card(struct pcmcia_socket *skt)
882{
883 int ret;
884
885 cs_dbg(skt, 1, "user insert request\n");
886
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100887 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 do {
889 if (skt->state & SOCKET_PRESENT) {
890 ret = -EBUSY;
891 break;
892 }
893 if (socket_insert(skt) == CS_NO_CARD) {
894 ret = -ENODEV;
895 break;
896 }
897 ret = 0;
898 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100899 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
901 return ret;
902} /* insert_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700903EXPORT_SYMBOL(pcmcia_insert_card);
904
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200906static int pcmcia_socket_uevent(struct device *dev, char **envp,
Kay Sievers312c0042005-11-16 09:00:00 +0100907 int num_envp, char *buffer, int buffer_size)
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700908{
909 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
910 int i = 0, length = 0;
911
Kay Sievers312c0042005-11-16 09:00:00 +0100912 if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
913 &length, "SOCKET_NO=%u", s->sock))
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700914 return -ENOMEM;
915
916 envp[i] = NULL;
917
918 return 0;
919}
920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700922static struct completion pcmcia_unload;
923
924static void pcmcia_release_socket_class(struct class *data)
925{
926 complete(&pcmcia_unload);
927}
928
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930struct class pcmcia_socket_class = {
931 .name = "pcmcia_socket",
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200932 .dev_uevent = pcmcia_socket_uevent,
933 .dev_release = pcmcia_release_socket,
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700934 .class_release = pcmcia_release_socket_class,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935};
936EXPORT_SYMBOL(pcmcia_socket_class);
937
938
939static int __init init_pcmcia_cs(void)
940{
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700941 int ret;
942
943 init_completion(&pcmcia_unload);
944 ret = class_register(&pcmcia_socket_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 if (ret)
946 return (ret);
947 return class_interface_register(&pccard_sysfs_interface);
948}
949
950static void __exit exit_pcmcia_cs(void)
951{
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700952 class_interface_unregister(&pccard_sysfs_interface);
953 class_unregister(&pcmcia_socket_class);
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700954
955 wait_for_completion(&pcmcia_unload);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956}
957
958subsys_initcall(init_pcmcia_cs);
959module_exit(exit_pcmcia_cs);
960