blob: 606a467403389718a03f21bab041f61fde4caee4 [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>
29#include <linux/pci.h>
30#include <linux/device.h>
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -050031#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080032#include <linux/freezer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/system.h>
34#include <asm/irq.h>
35
36#define IN_CARD_SERVICES
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <pcmcia/cs_types.h>
38#include <pcmcia/ss.h>
39#include <pcmcia/cs.h>
40#include <pcmcia/bulkmem.h>
41#include <pcmcia/cistpl.h>
42#include <pcmcia/cisreg.h>
43#include <pcmcia/ds.h>
44#include "cs_internal.h"
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47/* Module parameters */
48
49MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
Dominik Brodowski33519dd2005-06-27 16:28:53 -070050MODULE_DESCRIPTION("Linux Kernel Card Services");
Linus Torvalds1da177e2005-04-16 15:20:36 -070051MODULE_LICENSE("GPL");
52
53#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
54
55INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
56INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
57INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
58INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
59INT_MODULE_PARM(reset_time, 10); /* usecs */
60INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
61INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
62INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
63
64/* Access speed for attribute memory windows */
65INT_MODULE_PARM(cis_speed, 300); /* ns */
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#ifdef DEBUG
68static int pc_debug;
69
70module_param(pc_debug, int, 0644);
71
72int cs_debug_level(int level)
73{
74 return pc_debug > level;
75}
76#endif
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79socket_state_t dead_socket = {
80 .csc_mask = SS_DETECT,
81};
Dominik Brodowski33519dd2005-06-27 16:28:53 -070082EXPORT_SYMBOL(dead_socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84
85/* List of all sockets, protected by a rwsem */
86LIST_HEAD(pcmcia_socket_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087EXPORT_SYMBOL(pcmcia_socket_list);
Dominik Brodowski33519dd2005-06-27 16:28:53 -070088
89DECLARE_RWSEM(pcmcia_socket_list_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
91
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093/**
Dominik Brodowski33519dd2005-06-27 16:28:53 -070094 * Low-level PCMCIA socket drivers need to register with the PCCard
95 * core using pcmcia_register_socket.
96 *
97 * socket drivers are expected to use the following callbacks in their
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 * .drv struct:
99 * - pcmcia_socket_dev_suspend
100 * - pcmcia_socket_dev_resume
101 * These functions check for the appropriate struct pcmcia_soket arrays,
102 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
103 */
104static int socket_resume(struct pcmcia_socket *skt);
105static int socket_suspend(struct pcmcia_socket *skt);
106
107int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state)
108{
109 struct pcmcia_socket *socket;
110
111 down_read(&pcmcia_socket_list_rwsem);
112 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
113 if (socket->dev.dev != dev)
114 continue;
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100115 mutex_lock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 socket_suspend(socket);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100117 mutex_unlock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 }
119 up_read(&pcmcia_socket_list_rwsem);
120
121 return 0;
122}
123EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
124
125int pcmcia_socket_dev_resume(struct device *dev)
126{
127 struct pcmcia_socket *socket;
128
129 down_read(&pcmcia_socket_list_rwsem);
130 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
131 if (socket->dev.dev != dev)
132 continue;
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100133 mutex_lock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 socket_resume(socket);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100135 mutex_unlock(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 }
137 up_read(&pcmcia_socket_list_rwsem);
138
139 return 0;
140}
141EXPORT_SYMBOL(pcmcia_socket_dev_resume);
142
143
144struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
145{
146 struct class_device *cl_dev = class_device_get(&skt->dev);
147 if (!cl_dev)
148 return NULL;
149 skt = class_get_devdata(cl_dev);
150 if (!try_module_get(skt->owner)) {
151 class_device_put(&skt->dev);
152 return NULL;
153 }
154 return (skt);
155}
156EXPORT_SYMBOL(pcmcia_get_socket);
157
158
159void pcmcia_put_socket(struct pcmcia_socket *skt)
160{
161 module_put(skt->owner);
162 class_device_put(&skt->dev);
163}
164EXPORT_SYMBOL(pcmcia_put_socket);
165
166
167static void pcmcia_release_socket(struct class_device *class_dev)
168{
169 struct pcmcia_socket *socket = class_get_devdata(class_dev);
170
171 complete(&socket->socket_released);
172}
173
174static int pccardd(void *__skt);
175
176/**
177 * pcmcia_register_socket - add a new pcmcia socket device
178 */
179int pcmcia_register_socket(struct pcmcia_socket *socket)
180{
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500181 struct task_struct *tsk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 int ret;
183
184 if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops)
185 return -EINVAL;
186
187 cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
188
189 spin_lock_init(&socket->lock);
190
191 if (socket->resource_ops->init) {
192 ret = socket->resource_ops->init(socket);
193 if (ret)
194 return (ret);
195 }
196
197 /* try to obtain a socket number [yes, it gets ugly if we
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700198 * register more than 2^sizeof(unsigned int) pcmcia
199 * sockets... but the socket number is deprecated
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 * anyways, so I don't care] */
201 down_write(&pcmcia_socket_list_rwsem);
202 if (list_empty(&pcmcia_socket_list))
203 socket->sock = 0;
204 else {
205 unsigned int found, i = 1;
206 struct pcmcia_socket *tmp;
207 do {
208 found = 1;
209 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
210 if (tmp->sock == i)
211 found = 0;
212 }
213 i++;
214 } while (!found);
215 socket->sock = i - 1;
216 }
217 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
218 up_write(&pcmcia_socket_list_rwsem);
219
Russell King5bc6b682005-07-07 17:59:07 -0700220#ifndef CONFIG_CARDBUS
221 /*
222 * If we do not support Cardbus, ensure that
223 * the Cardbus socket capability is disabled.
224 */
225 socket->features &= ~SS_CAP_CARDBUS;
226#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 /* set proper values in socket->dev */
229 socket->dev.class_data = socket;
230 socket->dev.class = &pcmcia_socket_class;
231 snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock);
232
233 /* base address = 0, map = 0 */
234 socket->cis_mem.flags = 0;
235 socket->cis_mem.speed = cis_speed;
236
237 INIT_LIST_HEAD(&socket->cis_cache);
238
239 init_completion(&socket->socket_released);
240 init_completion(&socket->thread_done);
241 init_waitqueue_head(&socket->thread_wait);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100242 mutex_init(&socket->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 spin_lock_init(&socket->thread_lock);
244
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500245 tsk = kthread_run(pccardd, socket, "pccardd");
246 if (IS_ERR(tsk)) {
247 ret = PTR_ERR(tsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 goto err;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 wait_for_completion(&socket->thread_done);
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500252 if (!socket->thread) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket);
254 return -EIO;
255 }
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 pcmcia_parse_events(socket, SS_DETECT);
258
259 return 0;
260
261 err:
262 down_write(&pcmcia_socket_list_rwsem);
263 list_del(&socket->socket_list);
264 up_write(&pcmcia_socket_list_rwsem);
265 return ret;
266} /* pcmcia_register_socket */
267EXPORT_SYMBOL(pcmcia_register_socket);
268
269
270/**
271 * pcmcia_unregister_socket - remove a pcmcia socket device
272 */
273void pcmcia_unregister_socket(struct pcmcia_socket *socket)
274{
275 if (!socket)
276 return;
277
278 cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
279
280 if (socket->thread) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 wake_up(&socket->thread_wait);
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500282 kthread_stop(socket->thread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 }
284 release_cis_mem(socket);
285
286 /* remove from our own list */
287 down_write(&pcmcia_socket_list_rwsem);
288 list_del(&socket->socket_list);
289 up_write(&pcmcia_socket_list_rwsem);
290
291 /* wait for sysfs to drop all references */
292 release_resource_db(socket);
293 wait_for_completion(&socket->socket_released);
294} /* pcmcia_unregister_socket */
295EXPORT_SYMBOL(pcmcia_unregister_socket);
296
297
298struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
299{
300 struct pcmcia_socket *s;
301
302 down_read(&pcmcia_socket_list_rwsem);
303 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
304 if (s->sock == nr) {
305 up_read(&pcmcia_socket_list_rwsem);
306 return s;
307 }
308 up_read(&pcmcia_socket_list_rwsem);
309
310 return NULL;
311
312}
313EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
314
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700315/**
316 * The central event handler. Send_event() sends an event to the
317 * 16-bit subsystem, which then calls the relevant device drivers.
318 * Parse_events() interprets the event bits from
319 * a card status change report. Do_shutdown() handles the high
320 * priority stuff associated with a card removal.
321 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323/* NOTE: send_event needs to be called with skt->sem held. */
324
325static int send_event(struct pcmcia_socket *s, event_t event, int priority)
326{
327 int ret;
328
329 if (s->state & SOCKET_CARDBUS)
330 return 0;
331
332 cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
333 event, priority, s->callback);
334
335 if (!s->callback)
336 return 0;
337 if (!try_module_get(s->callback->owner))
338 return 0;
339
340 ret = s->callback->event(s, event, priority);
341
342 module_put(s->callback->owner);
343
344 return ret;
345}
346
347static void socket_remove_drivers(struct pcmcia_socket *skt)
348{
349 cs_dbg(skt, 4, "remove_drivers\n");
350
351 send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
352}
353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354static int socket_reset(struct pcmcia_socket *skt)
355{
356 int status, i;
357
358 cs_dbg(skt, 4, "reset\n");
359
360 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
361 skt->ops->set_socket(skt, &skt->socket);
362 udelay((long)reset_time);
363
364 skt->socket.flags &= ~SS_RESET;
365 skt->ops->set_socket(skt, &skt->socket);
366
367 msleep(unreset_delay * 10);
368 for (i = 0; i < unreset_limit; i++) {
369 skt->ops->get_status(skt, &status);
370
371 if (!(status & SS_DETECT))
372 return CS_NO_CARD;
373
374 if (status & SS_READY)
375 return CS_SUCCESS;
376
377 msleep(unreset_check * 10);
378 }
379
380 cs_err(skt, "time out after reset.\n");
381 return CS_GENERAL_FAILURE;
382}
383
Daniel Ritz6e493882005-12-30 15:12:35 +0100384/**
385 * socket_setup() and socket_shutdown() are called by the main event handler
386 * when card insertion and removal events are received.
387 * socket_setup() turns on socket power and resets the socket, in two stages.
388 * socket_shutdown() unconfigures a socket and turns off socket power.
389 */
390static void socket_shutdown(struct pcmcia_socket *s)
391{
392 int status;
393
394 cs_dbg(s, 4, "shutdown\n");
395
396 socket_remove_drivers(s);
397 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
398 msleep(shutdown_delay * 10);
399 s->state &= SOCKET_INUSE;
400
401 /* Blank out the socket state */
402 s->socket = dead_socket;
403 s->ops->init(s);
404 s->ops->set_socket(s, &s->socket);
405 s->irq.AssignedIRQ = s->irq.Config = 0;
406 s->lock_count = 0;
407 destroy_cis_cache(s);
408#ifdef CONFIG_CARDBUS
409 cb_free(s);
410#endif
411 s->functions = 0;
Daniel Ritz6e493882005-12-30 15:12:35 +0100412
413 s->ops->get_status(s, &status);
414 if (status & SS_POWERON) {
415 printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
416 }
417
418 cs_socket_put(s);
419}
420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
422{
423 int status, i;
424
425 cs_dbg(skt, 4, "setup\n");
426
427 skt->ops->get_status(skt, &status);
428 if (!(status & SS_DETECT))
429 return CS_NO_CARD;
430
431 msleep(initial_delay * 10);
432
433 for (i = 0; i < 100; i++) {
434 skt->ops->get_status(skt, &status);
435 if (!(status & SS_DETECT))
436 return CS_NO_CARD;
437
438 if (!(status & SS_PENDING))
439 break;
440
441 msleep(100);
442 }
443
444 if (status & SS_PENDING) {
445 cs_err(skt, "voltage interrogation timed out.\n");
446 return CS_GENERAL_FAILURE;
447 }
448
449 if (status & SS_CARDBUS) {
Russell King5bc6b682005-07-07 17:59:07 -0700450 if (!(skt->features & SS_CAP_CARDBUS)) {
451 cs_err(skt, "cardbus cards are not supported.\n");
452 return CS_BAD_TYPE;
453 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 skt->state |= SOCKET_CARDBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 }
456
457 /*
458 * Decode the card voltage requirements, and apply power to the card.
459 */
460 if (status & SS_3VCARD)
461 skt->socket.Vcc = skt->socket.Vpp = 33;
462 else if (!(status & SS_XVCARD))
463 skt->socket.Vcc = skt->socket.Vpp = 50;
464 else {
465 cs_err(skt, "unsupported voltage key.\n");
466 return CS_BAD_TYPE;
467 }
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700468
469 if (skt->power_hook)
470 skt->power_hook(skt, HOOK_POWER_PRE);
471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 skt->socket.flags = 0;
473 skt->ops->set_socket(skt, &skt->socket);
474
475 /*
476 * Wait "vcc_settle" for the supply to stabilise.
477 */
478 msleep(vcc_settle * 10);
479
480 skt->ops->get_status(skt, &status);
481 if (!(status & SS_POWERON)) {
482 cs_err(skt, "unable to apply power.\n");
483 return CS_BAD_TYPE;
484 }
485
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700486 status = socket_reset(skt);
487
488 if (skt->power_hook)
489 skt->power_hook(skt, HOOK_POWER_POST);
490
491 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492}
493
494/*
495 * Handle card insertion. Setup the socket, reset the card,
496 * and then tell the rest of PCMCIA that a card is present.
497 */
498static int socket_insert(struct pcmcia_socket *skt)
499{
500 int ret;
501
502 cs_dbg(skt, 4, "insert\n");
503
504 if (!cs_socket_get(skt))
505 return CS_NO_CARD;
506
507 ret = socket_setup(skt, setup_delay);
508 if (ret == CS_SUCCESS) {
509 skt->state |= SOCKET_PRESENT;
Dominik Brodowski807277c2005-11-12 23:34:06 +0100510
511 printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n",
512 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
513 skt->sock);
514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515#ifdef CONFIG_CARDBUS
516 if (skt->state & SOCKET_CARDBUS) {
517 cb_alloc(skt);
518 skt->state |= SOCKET_CARDBUS_CONFIG;
519 }
520#endif
521 cs_dbg(skt, 4, "insert done\n");
522
523 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
524 } else {
525 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 }
527
528 return ret;
529}
530
531static int socket_suspend(struct pcmcia_socket *skt)
532{
533 if (skt->state & SOCKET_SUSPEND)
534 return CS_IN_USE;
535
536 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
537 skt->socket = dead_socket;
538 skt->ops->set_socket(skt, &skt->socket);
539 if (skt->ops->suspend)
540 skt->ops->suspend(skt);
541 skt->state |= SOCKET_SUSPEND;
542
543 return CS_SUCCESS;
544}
545
546/*
547 * Resume a socket. If a card is present, verify its CIS against
548 * our cached copy. If they are different, the card has been
549 * replaced, and we need to tell the drivers.
550 */
551static int socket_resume(struct pcmcia_socket *skt)
552{
553 int ret;
554
555 if (!(skt->state & SOCKET_SUSPEND))
556 return CS_IN_USE;
557
558 skt->socket = dead_socket;
559 skt->ops->init(skt);
560 skt->ops->set_socket(skt, &skt->socket);
561
562 if (!(skt->state & SOCKET_PRESENT)) {
563 skt->state &= ~SOCKET_SUSPEND;
564 return socket_insert(skt);
565 }
566
567 ret = socket_setup(skt, resume_delay);
568 if (ret == CS_SUCCESS) {
569 /*
570 * FIXME: need a better check here for cardbus cards.
571 */
572 if (verify_cis_cache(skt) != 0) {
573 cs_dbg(skt, 4, "cis mismatch - different card\n");
574 socket_remove_drivers(skt);
575 destroy_cis_cache(skt);
576 /*
577 * Workaround: give DS time to schedule removal.
578 * Remove me once the 100ms delay is eliminated
579 * in ds.c
580 */
581 msleep(200);
582 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
583 } else {
584 cs_dbg(skt, 4, "cis matches cache\n");
585 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
586 }
587 } else {
588 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 }
590
591 skt->state &= ~SOCKET_SUSPEND;
592
593 return CS_SUCCESS;
594}
595
596static void socket_remove(struct pcmcia_socket *skt)
597{
Dominik Brodowski807277c2005-11-12 23:34:06 +0100598 printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600}
601
602/*
603 * Process a socket card detect status change.
604 *
605 * If we don't have a card already present, delay the detect event for
606 * about 20ms (to be on the safe side) before reading the socket status.
607 *
608 * Some i82365-based systems send multiple SS_DETECT events during card
609 * insertion, and the "card present" status bit seems to bounce. This
610 * will probably be true with GPIO-based card detection systems after
611 * the product has aged.
612 */
613static void socket_detect_change(struct pcmcia_socket *skt)
614{
615 if (!(skt->state & SOCKET_SUSPEND)) {
616 int status;
617
618 if (!(skt->state & SOCKET_PRESENT))
619 msleep(20);
620
621 skt->ops->get_status(skt, &status);
622 if ((skt->state & SOCKET_PRESENT) &&
623 !(status & SS_DETECT))
624 socket_remove(skt);
625 if (!(skt->state & SOCKET_PRESENT) &&
626 (status & SS_DETECT))
627 socket_insert(skt);
628 }
629}
630
631static int pccardd(void *__skt)
632{
633 struct pcmcia_socket *skt = __skt;
634 DECLARE_WAITQUEUE(wait, current);
635 int ret;
636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 skt->thread = current;
638 skt->socket = dead_socket;
639 skt->ops->init(skt);
640 skt->ops->set_socket(skt, &skt->socket);
641
642 /* register with the device core */
643 ret = class_device_register(&skt->dev);
644 if (ret) {
645 printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
646 skt);
647 skt->thread = NULL;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500648 complete(&skt->thread_done);
649 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
652 add_wait_queue(&skt->thread_wait, &wait);
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700653 complete(&skt->thread_done);
654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 for (;;) {
656 unsigned long flags;
657 unsigned int events;
658
659 set_current_state(TASK_INTERRUPTIBLE);
660
661 spin_lock_irqsave(&skt->thread_lock, flags);
662 events = skt->thread_events;
663 skt->thread_events = 0;
664 spin_unlock_irqrestore(&skt->thread_lock, flags);
665
666 if (events) {
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100667 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (events & SS_DETECT)
669 socket_detect_change(skt);
670 if (events & SS_BATDEAD)
671 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
672 if (events & SS_BATWARN)
673 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
674 if (events & SS_READY)
675 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100676 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 continue;
678 }
679
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500680 if (kthread_should_stop())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 break;
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700682
683 schedule();
684 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 }
Steven Rostedt220ec022005-10-10 11:13:17 -0400686 /* make sure we are running before we exit */
687 set_current_state(TASK_RUNNING);
688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 remove_wait_queue(&skt->thread_wait, &wait);
690
691 /* remove from the device core */
692 class_device_unregister(&skt->dev);
693
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500694 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695}
696
697/*
698 * Yenta (at least) probes interrupts before registering the socket and
699 * starting the handler thread.
700 */
701void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
702{
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200703 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 cs_dbg(s, 4, "parse_events: events %08x\n", events);
705 if (s->thread) {
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200706 spin_lock_irqsave(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 s->thread_events |= events;
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200708 spin_unlock_irqrestore(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 wake_up(&s->thread_wait);
711 }
712} /* pcmcia_parse_events */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700713EXPORT_SYMBOL(pcmcia_parse_events);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716/* register pcmcia_callback */
717int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
718{
719 int ret = 0;
720
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100721 /* s->skt_mutex also protects s->callback */
722 mutex_lock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
724 if (c) {
725 /* registration */
726 if (s->callback) {
727 ret = -EBUSY;
728 goto err;
729 }
730
731 s->callback = c;
732
733 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
734 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
735 } else
736 s->callback = NULL;
737 err:
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100738 mutex_unlock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740 return ret;
741}
742EXPORT_SYMBOL(pccard_register_pcmcia);
743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700745/* I'm not sure which "reset" function this is supposed to use,
746 * but for now, it uses the low-level interface's reset, not the
747 * CIS register.
748 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
750int pccard_reset_card(struct pcmcia_socket *skt)
751{
752 int ret;
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 cs_dbg(skt, 1, "resetting socket\n");
755
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100756 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 do {
758 if (!(skt->state & SOCKET_PRESENT)) {
759 ret = CS_NO_CARD;
760 break;
761 }
762 if (skt->state & SOCKET_SUSPEND) {
763 ret = CS_IN_USE;
764 break;
765 }
766 if (skt->state & SOCKET_CARDBUS) {
767 ret = CS_UNSUPPORTED_FUNCTION;
768 break;
769 }
770
771 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
772 if (ret == 0) {
773 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100774 if (skt->callback)
775 skt->callback->suspend(skt);
776 if (socket_reset(skt) == CS_SUCCESS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100778 if (skt->callback)
779 skt->callback->resume(skt);
780 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 }
782
783 ret = CS_SUCCESS;
784 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100785 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
787 return ret;
788} /* reset_card */
789EXPORT_SYMBOL(pccard_reset_card);
790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700792/* These shut down or wake up a socket. They are sort of user
793 * initiated versions of the APM suspend and resume actions.
794 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795int pcmcia_suspend_card(struct pcmcia_socket *skt)
796{
797 int ret;
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 cs_dbg(skt, 1, "suspending socket\n");
800
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100801 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 do {
803 if (!(skt->state & SOCKET_PRESENT)) {
804 ret = CS_NO_CARD;
805 break;
806 }
807 if (skt->state & SOCKET_CARDBUS) {
808 ret = CS_UNSUPPORTED_FUNCTION;
809 break;
810 }
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100811 if (skt->callback) {
812 ret = skt->callback->suspend(skt);
813 if (ret)
814 break;
815 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 ret = socket_suspend(skt);
817 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100818 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820 return ret;
821} /* suspend_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700822EXPORT_SYMBOL(pcmcia_suspend_card);
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825int pcmcia_resume_card(struct pcmcia_socket *skt)
826{
827 int ret;
828
829 cs_dbg(skt, 1, "waking up socket\n");
830
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100831 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 do {
833 if (!(skt->state & SOCKET_PRESENT)) {
834 ret = CS_NO_CARD;
835 break;
836 }
837 if (skt->state & SOCKET_CARDBUS) {
838 ret = CS_UNSUPPORTED_FUNCTION;
839 break;
840 }
841 ret = socket_resume(skt);
Dominik Brodowski8e9e7932006-01-06 00:02:03 +0100842 if (!ret && skt->callback)
843 skt->callback->resume(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100845 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
847 return ret;
848} /* resume_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700849EXPORT_SYMBOL(pcmcia_resume_card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700852/* These handle user requests to eject or insert a card. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853int pcmcia_eject_card(struct pcmcia_socket *skt)
854{
855 int ret;
856
857 cs_dbg(skt, 1, "user eject request\n");
858
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100859 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 do {
861 if (!(skt->state & SOCKET_PRESENT)) {
862 ret = -ENODEV;
863 break;
864 }
865
866 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
867 if (ret != 0) {
868 ret = -EINVAL;
869 break;
870 }
871
872 socket_remove(skt);
873 ret = 0;
874 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100875 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 return ret;
878} /* eject_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700879EXPORT_SYMBOL(pcmcia_eject_card);
880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
882int pcmcia_insert_card(struct pcmcia_socket *skt)
883{
884 int ret;
885
886 cs_dbg(skt, 1, "user insert request\n");
887
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100888 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 do {
890 if (skt->state & SOCKET_PRESENT) {
891 ret = -EBUSY;
892 break;
893 }
894 if (socket_insert(skt) == CS_NO_CARD) {
895 ret = -ENODEV;
896 break;
897 }
898 ret = 0;
899 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100900 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
902 return ret;
903} /* insert_card */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700904EXPORT_SYMBOL(pcmcia_insert_card);
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Kay Sievers312c0042005-11-16 09:00:00 +0100907static int pcmcia_socket_uevent(struct class_device *dev, char **envp,
908 int num_envp, char *buffer, int buffer_size)
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700909{
910 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
911 int i = 0, length = 0;
912
Kay Sievers312c0042005-11-16 09:00:00 +0100913 if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
914 &length, "SOCKET_NO=%u", s->sock))
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700915 return -ENOMEM;
916
917 envp[i] = NULL;
918
919 return 0;
920}
921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700923static struct completion pcmcia_unload;
924
925static void pcmcia_release_socket_class(struct class *data)
926{
927 complete(&pcmcia_unload);
928}
929
930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931struct class pcmcia_socket_class = {
932 .name = "pcmcia_socket",
Kay Sievers312c0042005-11-16 09:00:00 +0100933 .uevent = pcmcia_socket_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 .release = pcmcia_release_socket,
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700935 .class_release = pcmcia_release_socket_class,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936};
937EXPORT_SYMBOL(pcmcia_socket_class);
938
939
940static int __init init_pcmcia_cs(void)
941{
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700942 int ret;
943
944 init_completion(&pcmcia_unload);
945 ret = class_register(&pcmcia_socket_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 if (ret)
947 return (ret);
948 return class_interface_register(&pccard_sysfs_interface);
949}
950
951static void __exit exit_pcmcia_cs(void)
952{
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700953 class_interface_unregister(&pccard_sysfs_interface);
954 class_unregister(&pcmcia_socket_class);
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700955
956 wait_for_completion(&pcmcia_unload);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957}
958
959subsys_initcall(init_pcmcia_cs);
960module_exit(exit_pcmcia_cs);
961