blob: 673c14ea11e3570f8bcf7ed872d46412b496d9ac [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/irq.h>
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <pcmcia/ss.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <pcmcia/cistpl.h>
36#include <pcmcia/cisreg.h>
37#include <pcmcia/ds.h>
38#include "cs_internal.h"
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41/* Module parameters */
42
43MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
Dominik Brodowski33519dd2005-06-27 16:28:53 -070044MODULE_DESCRIPTION("Linux Kernel Card Services");
Linus Torvalds1da177e2005-04-16 15:20:36 -070045MODULE_LICENSE("GPL");
46
47#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
48
49INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
50INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
51INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
52INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
53INT_MODULE_PARM(reset_time, 10); /* usecs */
54INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
55INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
56INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
57
58/* Access speed for attribute memory windows */
59INT_MODULE_PARM(cis_speed, 300); /* ns */
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62socket_state_t dead_socket = {
63 .csc_mask = SS_DETECT,
64};
Dominik Brodowski33519dd2005-06-27 16:28:53 -070065EXPORT_SYMBOL(dead_socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67
68/* List of all sockets, protected by a rwsem */
69LIST_HEAD(pcmcia_socket_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070EXPORT_SYMBOL(pcmcia_socket_list);
Dominik Brodowski33519dd2005-06-27 16:28:53 -070071
72DECLARE_RWSEM(pcmcia_socket_list_rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
74
75
Dominik Brodowski9fea84f2009-12-07 22:11:45 +010076struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
Greg Kroah-Hartman87373312006-09-12 17:00:10 +020078 struct device *dev = get_device(&skt->dev);
79 if (!dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return NULL;
Dominik Brodowski593f010b2010-01-02 22:59:15 +010081 return dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83EXPORT_SYMBOL(pcmcia_get_socket);
84
85
86void pcmcia_put_socket(struct pcmcia_socket *skt)
87{
Greg Kroah-Hartman87373312006-09-12 17:00:10 +020088 put_device(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089}
90EXPORT_SYMBOL(pcmcia_put_socket);
91
92
Greg Kroah-Hartman87373312006-09-12 17:00:10 +020093static void pcmcia_release_socket(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Greg Kroah-Hartman87373312006-09-12 17:00:10 +020095 struct pcmcia_socket *socket = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97 complete(&socket->socket_released);
98}
99
100static int pccardd(void *__skt);
101
102/**
103 * pcmcia_register_socket - add a new pcmcia socket device
Randy Dunlap78187862007-12-10 15:49:22 -0800104 * @socket: the &socket to register
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 */
106int pcmcia_register_socket(struct pcmcia_socket *socket)
107{
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500108 struct task_struct *tsk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 int ret;
110
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200111 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 return -EINVAL;
113
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200114 dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 /* try to obtain a socket number [yes, it gets ugly if we
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700117 * register more than 2^sizeof(unsigned int) pcmcia
118 * sockets... but the socket number is deprecated
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 * anyways, so I don't care] */
120 down_write(&pcmcia_socket_list_rwsem);
121 if (list_empty(&pcmcia_socket_list))
122 socket->sock = 0;
123 else {
124 unsigned int found, i = 1;
125 struct pcmcia_socket *tmp;
126 do {
127 found = 1;
128 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
129 if (tmp->sock == i)
130 found = 0;
131 }
132 i++;
133 } while (!found);
134 socket->sock = i - 1;
135 }
136 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
137 up_write(&pcmcia_socket_list_rwsem);
138
Russell King5bc6b682005-07-07 17:59:07 -0700139#ifndef CONFIG_CARDBUS
140 /*
141 * If we do not support Cardbus, ensure that
142 * the Cardbus socket capability is disabled.
143 */
144 socket->features &= ~SS_CAP_CARDBUS;
145#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 /* set proper values in socket->dev */
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200148 dev_set_drvdata(&socket->dev, socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 socket->dev.class = &pcmcia_socket_class;
Kay Sievers25096982008-11-01 11:46:06 +0100150 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 /* base address = 0, map = 0 */
153 socket->cis_mem.flags = 0;
154 socket->cis_mem.speed = cis_speed;
155
156 INIT_LIST_HEAD(&socket->cis_cache);
157
158 init_completion(&socket->socket_released);
159 init_completion(&socket->thread_done);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100160 mutex_init(&socket->skt_mutex);
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100161 mutex_init(&socket->ops_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 spin_lock_init(&socket->thread_lock);
163
Dominik Brodowskib1769452008-11-09 21:47:47 +0100164 if (socket->resource_ops->init) {
Dominik Brodowskicfe5d802010-01-17 19:31:45 +0100165 mutex_lock(&socket->ops_mutex);
Dominik Brodowskib1769452008-11-09 21:47:47 +0100166 ret = socket->resource_ops->init(socket);
Dominik Brodowskicfe5d802010-01-17 19:31:45 +0100167 mutex_unlock(&socket->ops_mutex);
Dominik Brodowskib1769452008-11-09 21:47:47 +0100168 if (ret)
169 goto err;
170 }
171
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500172 tsk = kthread_run(pccardd, socket, "pccardd");
173 if (IS_ERR(tsk)) {
174 ret = PTR_ERR(tsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 goto err;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500176 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178 wait_for_completion(&socket->thread_done);
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500179 if (!socket->thread) {
Dominik Brodowski2e55bf62008-08-02 18:08:38 +0200180 dev_printk(KERN_WARNING, &socket->dev,
181 "PCMCIA: warning: socket thread did not start\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return -EIO;
183 }
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 pcmcia_parse_events(socket, SS_DETECT);
186
Dominik Brodowski638bba52009-11-07 12:26:17 +0100187 /*
188 * Let's try to get the PCMCIA module for 16-bit PCMCIA support.
189 * If it fails, it doesn't matter -- we still have 32-bit CardBus
190 * support to offer, so this is not a failure mode.
191 */
192 request_module_nowait("pcmcia");
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 return 0;
195
196 err:
197 down_write(&pcmcia_socket_list_rwsem);
198 list_del(&socket->socket_list);
199 up_write(&pcmcia_socket_list_rwsem);
200 return ret;
201} /* pcmcia_register_socket */
202EXPORT_SYMBOL(pcmcia_register_socket);
203
204
205/**
206 * pcmcia_unregister_socket - remove a pcmcia socket device
Randy Dunlap78187862007-12-10 15:49:22 -0800207 * @socket: the &socket to unregister
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 */
209void pcmcia_unregister_socket(struct pcmcia_socket *socket)
210{
211 if (!socket)
212 return;
213
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200214 dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Christoph Hellwig0b402092007-04-22 13:55:36 +0100216 if (socket->thread)
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500217 kthread_stop(socket->thread);
Christoph Hellwig0b402092007-04-22 13:55:36 +0100218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* remove from our own list */
220 down_write(&pcmcia_socket_list_rwsem);
221 list_del(&socket->socket_list);
222 up_write(&pcmcia_socket_list_rwsem);
223
224 /* wait for sysfs to drop all references */
Dominik Brodowskicfe5d802010-01-17 19:31:45 +0100225 if (socket->resource_ops->exit) {
226 mutex_lock(&socket->ops_mutex);
Dominik Brodowski385ee872010-01-06 11:23:58 +0100227 socket->resource_ops->exit(socket);
Dominik Brodowskicfe5d802010-01-17 19:31:45 +0100228 mutex_unlock(&socket->ops_mutex);
229 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 wait_for_completion(&socket->socket_released);
231} /* pcmcia_unregister_socket */
232EXPORT_SYMBOL(pcmcia_unregister_socket);
233
234
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100235struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236{
237 struct pcmcia_socket *s;
238
239 down_read(&pcmcia_socket_list_rwsem);
240 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
241 if (s->sock == nr) {
242 up_read(&pcmcia_socket_list_rwsem);
243 return s;
244 }
245 up_read(&pcmcia_socket_list_rwsem);
246
247 return NULL;
248
249}
250EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
251
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252static int socket_reset(struct pcmcia_socket *skt)
253{
254 int status, i;
255
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200256 dev_dbg(&skt->dev, "reset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
259 skt->ops->set_socket(skt, &skt->socket);
260 udelay((long)reset_time);
261
262 skt->socket.flags &= ~SS_RESET;
263 skt->ops->set_socket(skt, &skt->socket);
264
265 msleep(unreset_delay * 10);
266 for (i = 0; i < unreset_limit; i++) {
267 skt->ops->get_status(skt, &status);
268
269 if (!(status & SS_DETECT))
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200270 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 if (status & SS_READY)
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200273 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275 msleep(unreset_check * 10);
276 }
277
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200278 dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n");
Dominik Brodowski85671422008-08-03 11:15:45 +0200279 return -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Randy Dunlap78187862007-12-10 15:49:22 -0800282/*
Daniel Ritz6e493882005-12-30 15:12:35 +0100283 * socket_setup() and socket_shutdown() are called by the main event handler
284 * when card insertion and removal events are received.
285 * socket_setup() turns on socket power and resets the socket, in two stages.
286 * socket_shutdown() unconfigures a socket and turns off socket power.
287 */
288static void socket_shutdown(struct pcmcia_socket *s)
289{
290 int status;
291
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200292 dev_dbg(&s->dev, "shutdown\n");
Daniel Ritz6e493882005-12-30 15:12:35 +0100293
Dominik Brodowski7b24e792010-07-11 10:26:53 +0200294 if (s->callback)
295 s->callback->remove(s);
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100296
297 mutex_lock(&s->ops_mutex);
Daniel Ritz6e493882005-12-30 15:12:35 +0100298 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
299 msleep(shutdown_delay * 10);
300 s->state &= SOCKET_INUSE;
301
302 /* Blank out the socket state */
303 s->socket = dead_socket;
304 s->ops->init(s);
305 s->ops->set_socket(s, &s->socket);
Daniel Ritz6e493882005-12-30 15:12:35 +0100306 s->lock_count = 0;
Dominik Brodowski904e3772010-01-02 12:28:04 +0100307 kfree(s->fake_cis);
308 s->fake_cis = NULL;
Dominik Brodowskic3bfc962010-01-18 08:43:39 +0100309 s->functions = 0;
310
311 /* From here on we can be sure that only we (that is, the
312 * pccardd thread) accesses this socket, and all (16-bit)
313 * PCMCIA interactions are gone. Therefore, release
314 * ops_mutex so that we don't get a sysfs-related lockdep
315 * warning.
316 */
317 mutex_unlock(&s->ops_mutex);
318
Daniel Ritz6e493882005-12-30 15:12:35 +0100319#ifdef CONFIG_CARDBUS
320 cb_free(s);
321#endif
Daniel Ritz6e493882005-12-30 15:12:35 +0100322
Daniel Ritzafb2c162007-07-31 00:38:08 -0700323 /* give socket some time to power down */
324 msleep(100);
325
Daniel Ritz6e493882005-12-30 15:12:35 +0100326 s->ops->get_status(s, &status);
327 if (status & SS_POWERON) {
Dominik Brodowski2e55bf62008-08-02 18:08:38 +0200328 dev_printk(KERN_ERR, &s->dev,
329 "*** DANGER *** unable to remove socket power\n");
Daniel Ritz6e493882005-12-30 15:12:35 +0100330 }
331
Dominik Brodowski3970dd82010-01-02 23:19:45 +0100332 s->state &= ~SOCKET_INUSE;
Daniel Ritz6e493882005-12-30 15:12:35 +0100333}
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
336{
337 int status, i;
338
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200339 dev_dbg(&skt->dev, "setup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 skt->ops->get_status(skt, &status);
342 if (!(status & SS_DETECT))
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200343 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 msleep(initial_delay * 10);
346
347 for (i = 0; i < 100; i++) {
348 skt->ops->get_status(skt, &status);
349 if (!(status & SS_DETECT))
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200350 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352 if (!(status & SS_PENDING))
353 break;
354
355 msleep(100);
356 }
357
358 if (status & SS_PENDING) {
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200359 dev_printk(KERN_ERR, &skt->dev,
360 "voltage interrogation timed out.\n");
Dominik Brodowski85671422008-08-03 11:15:45 +0200361 return -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
363
364 if (status & SS_CARDBUS) {
Russell King5bc6b682005-07-07 17:59:07 -0700365 if (!(skt->features & SS_CAP_CARDBUS)) {
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200366 dev_printk(KERN_ERR, &skt->dev,
367 "cardbus cards are not supported.\n");
Dominik Brodowski610e2372008-08-03 11:58:53 +0200368 return -EINVAL;
Russell King5bc6b682005-07-07 17:59:07 -0700369 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 skt->state |= SOCKET_CARDBUS;
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100371 } else
372 skt->state &= ~SOCKET_CARDBUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 /*
375 * Decode the card voltage requirements, and apply power to the card.
376 */
377 if (status & SS_3VCARD)
378 skt->socket.Vcc = skt->socket.Vpp = 33;
379 else if (!(status & SS_XVCARD))
380 skt->socket.Vcc = skt->socket.Vpp = 50;
381 else {
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200382 dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n");
Dominik Brodowski610e2372008-08-03 11:58:53 +0200383 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700385
386 if (skt->power_hook)
387 skt->power_hook(skt, HOOK_POWER_PRE);
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 skt->socket.flags = 0;
390 skt->ops->set_socket(skt, &skt->socket);
391
392 /*
393 * Wait "vcc_settle" for the supply to stabilise.
394 */
395 msleep(vcc_settle * 10);
396
397 skt->ops->get_status(skt, &status);
398 if (!(status & SS_POWERON)) {
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200399 dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n");
Dominik Brodowski610e2372008-08-03 11:58:53 +0200400 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
402
Daniel Ritzfa912bc2005-06-23 00:10:12 -0700403 status = socket_reset(skt);
404
405 if (skt->power_hook)
406 skt->power_hook(skt, HOOK_POWER_POST);
407
408 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
410
411/*
412 * Handle card insertion. Setup the socket, reset the card,
413 * and then tell the rest of PCMCIA that a card is present.
414 */
415static int socket_insert(struct pcmcia_socket *skt)
416{
417 int ret;
418
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200419 dev_dbg(&skt->dev, "insert\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100421 mutex_lock(&skt->ops_mutex);
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100422 if (skt->state & SOCKET_INUSE) {
423 mutex_unlock(&skt->ops_mutex);
424 return -EINVAL;
425 }
Dominik Brodowski3970dd82010-01-02 23:19:45 +0100426 skt->state |= SOCKET_INUSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428 ret = socket_setup(skt, setup_delay);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200429 if (ret == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 skt->state |= SOCKET_PRESENT;
Dominik Brodowski807277c2005-11-12 23:34:06 +0100431
Dominik Brodowski2e55bf62008-08-02 18:08:38 +0200432 dev_printk(KERN_NOTICE, &skt->dev,
433 "pccard: %s card inserted into slot %d\n",
434 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
435 skt->sock);
Dominik Brodowski807277c2005-11-12 23:34:06 +0100436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437#ifdef CONFIG_CARDBUS
438 if (skt->state & SOCKET_CARDBUS) {
439 cb_alloc(skt);
440 skt->state |= SOCKET_CARDBUS_CONFIG;
441 }
442#endif
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200443 dev_dbg(&skt->dev, "insert done\n");
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100444 mutex_unlock(&skt->ops_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Dominik Brodowski7b24e792010-07-11 10:26:53 +0200446 if (!(skt->state & SOCKET_CARDBUS) && (skt->callback))
447 skt->callback->add(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 } else {
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100449 mutex_unlock(&skt->ops_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 }
452
453 return ret;
454}
455
456static int socket_suspend(struct pcmcia_socket *skt)
457{
458 if (skt->state & SOCKET_SUSPEND)
Dominik Brodowskif9580952008-08-03 11:40:19 +0200459 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100461 mutex_lock(&skt->ops_mutex);
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100462 skt->suspended_state = skt->state;
463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 skt->socket = dead_socket;
465 skt->ops->set_socket(skt, &skt->socket);
466 if (skt->ops->suspend)
467 skt->ops->suspend(skt);
468 skt->state |= SOCKET_SUSPEND;
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100469 mutex_unlock(&skt->ops_mutex);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200470 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471}
472
Rafael J. Wysocki9905d1b2009-11-03 10:54:58 +0100473static int socket_early_resume(struct pcmcia_socket *skt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474{
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100475 mutex_lock(&skt->ops_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 skt->socket = dead_socket;
477 skt->ops->init(skt);
478 skt->ops->set_socket(skt, &skt->socket);
Rafael J. Wysocki9905d1b2009-11-03 10:54:58 +0100479 if (skt->state & SOCKET_PRESENT)
480 skt->resume_status = socket_setup(skt, resume_delay);
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100481 mutex_unlock(&skt->ops_mutex);
Rafael J. Wysocki9905d1b2009-11-03 10:54:58 +0100482 return 0;
483}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Rafael J. Wysocki9905d1b2009-11-03 10:54:58 +0100485static int socket_late_resume(struct pcmcia_socket *skt)
486{
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100487 int ret;
488
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100489 mutex_lock(&skt->ops_mutex);
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100490 skt->state &= ~SOCKET_SUSPEND;
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100491 mutex_unlock(&skt->ops_mutex);
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100492
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100493 if (!(skt->state & SOCKET_PRESENT)) {
494 ret = socket_insert(skt);
495 if (ret == -ENODEV)
496 ret = 0;
497 return ret;
498 }
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100499
500 if (skt->resume_status) {
501 socket_shutdown(skt);
502 return 0;
503 }
504
505 if (skt->suspended_state != skt->state) {
506 dev_dbg(&skt->dev,
507 "suspend state 0x%x != resume state 0x%x\n",
508 skt->suspended_state, skt->state);
509
510 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return socket_insert(skt);
512 }
513
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100514#ifdef CONFIG_CARDBUS
515 if (skt->state & SOCKET_CARDBUS) {
516 /* We can't be sure the CardBus card is the same
517 * as the one previously inserted. Therefore, remove
518 * and re-add... */
519 cb_free(skt);
520 cb_alloc(skt);
521 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 }
Dominik Brodowski88b060d2010-01-02 14:14:23 +0100523#endif
Dominik Brodowski7b24e792010-07-11 10:26:53 +0200524 if (!(skt->state & SOCKET_CARDBUS) && (skt->callback))
525 skt->callback->early_resume(skt);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200526 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527}
528
Rafael J. Wysocki9905d1b2009-11-03 10:54:58 +0100529/*
530 * Resume a socket. If a card is present, verify its CIS against
531 * our cached copy. If they are different, the card has been
532 * replaced, and we need to tell the drivers.
533 */
534static int socket_resume(struct pcmcia_socket *skt)
535{
536 if (!(skt->state & SOCKET_SUSPEND))
537 return -EBUSY;
538
539 socket_early_resume(skt);
540 return socket_late_resume(skt);
541}
542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543static void socket_remove(struct pcmcia_socket *skt)
544{
Dominik Brodowski2e55bf62008-08-02 18:08:38 +0200545 dev_printk(KERN_NOTICE, &skt->dev,
546 "pccard: card ejected from slot %d\n", skt->sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 socket_shutdown(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548}
549
550/*
551 * Process a socket card detect status change.
552 *
553 * If we don't have a card already present, delay the detect event for
554 * about 20ms (to be on the safe side) before reading the socket status.
555 *
556 * Some i82365-based systems send multiple SS_DETECT events during card
557 * insertion, and the "card present" status bit seems to bounce. This
558 * will probably be true with GPIO-based card detection systems after
559 * the product has aged.
560 */
561static void socket_detect_change(struct pcmcia_socket *skt)
562{
563 if (!(skt->state & SOCKET_SUSPEND)) {
564 int status;
565
566 if (!(skt->state & SOCKET_PRESENT))
567 msleep(20);
568
569 skt->ops->get_status(skt, &status);
570 if ((skt->state & SOCKET_PRESENT) &&
571 !(status & SS_DETECT))
572 socket_remove(skt);
573 if (!(skt->state & SOCKET_PRESENT) &&
574 (status & SS_DETECT))
575 socket_insert(skt);
576 }
577}
578
579static int pccardd(void *__skt)
580{
581 struct pcmcia_socket *skt = __skt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 int ret;
583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 skt->thread = current;
585 skt->socket = dead_socket;
586 skt->ops->init(skt);
587 skt->ops->set_socket(skt, &skt->socket);
588
589 /* register with the device core */
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200590 ret = device_register(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 if (ret) {
Dominik Brodowski2e55bf62008-08-02 18:08:38 +0200592 dev_printk(KERN_WARNING, &skt->dev,
593 "PCMCIA: unable to register socket\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 skt->thread = NULL;
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500595 complete(&skt->thread_done);
596 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 }
David Brownell4356d732008-04-28 01:03:20 -0700598 ret = pccard_sysfs_add_socket(&skt->dev);
599 if (ret)
600 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700602 complete(&skt->thread_done);
603
Dominik Brodowskid801c1402010-02-17 11:02:22 +0100604 /* wait for userspace to catch up */
605 msleep(250);
606
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700607 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 for (;;) {
609 unsigned long flags;
610 unsigned int events;
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100611 unsigned int sysfs_events;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 set_current_state(TASK_INTERRUPTIBLE);
614
615 spin_lock_irqsave(&skt->thread_lock, flags);
616 events = skt->thread_events;
617 skt->thread_events = 0;
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100618 sysfs_events = skt->sysfs_events;
619 skt->sysfs_events = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 spin_unlock_irqrestore(&skt->thread_lock, flags);
621
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100622 mutex_lock(&skt->skt_mutex);
Dominik Brodowski216d7cd2010-07-11 10:04:59 +0200623 if (events & SS_DETECT)
624 socket_detect_change(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100626 if (sysfs_events) {
627 if (sysfs_events & PCMCIA_UEVENT_EJECT)
628 socket_remove(skt);
629 if (sysfs_events & PCMCIA_UEVENT_INSERT)
630 socket_insert(skt);
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100631 if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) &&
632 !(skt->state & SOCKET_CARDBUS)) {
633 if (skt->callback)
634 ret = skt->callback->suspend(skt);
635 else
636 ret = 0;
Dominik Brodowski43821242010-05-03 15:10:09 +0200637 if (!ret) {
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100638 socket_suspend(skt);
Dominik Brodowski43821242010-05-03 15:10:09 +0200639 msleep(100);
640 }
641 }
642 if ((sysfs_events & PCMCIA_UEVENT_RESUME) &&
643 !(skt->state & SOCKET_CARDBUS)) {
644 ret = socket_resume(skt);
645 if (!ret && skt->callback)
646 skt->callback->resume(skt);
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100647 }
Dominik Brodowskiaf461fc2010-01-17 19:30:53 +0100648 if ((sysfs_events & PCMCIA_UEVENT_REQUERY) &&
649 !(skt->state & SOCKET_CARDBUS)) {
650 if (!ret && skt->callback)
651 skt->callback->requery(skt);
652 }
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100653 }
654 mutex_unlock(&skt->skt_mutex);
655
656 if (events || sysfs_events)
657 continue;
658
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500659 if (kthread_should_stop())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 break;
Daniel Ritzbf4de6f2005-09-09 13:03:23 -0700661
662 schedule();
663 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 }
Steven Rostedt220ec022005-10-10 11:13:17 -0400665 /* make sure we are running before we exit */
666 set_current_state(TASK_RUNNING);
667
Dominik Brodowski3970dd82010-01-02 23:19:45 +0100668 /* shut down socket, if a device is still present */
669 if (skt->state & SOCKET_PRESENT) {
670 mutex_lock(&skt->skt_mutex);
671 socket_remove(skt);
672 mutex_unlock(&skt->skt_mutex);
673 }
674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 /* remove from the device core */
David Brownell4356d732008-04-28 01:03:20 -0700676 pccard_sysfs_remove_socket(&skt->dev);
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200677 device_unregister(&skt->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Serge E. Hallyn1da9ab72006-06-14 08:01:26 -0500679 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680}
681
682/*
683 * Yenta (at least) probes interrupts before registering the socket and
684 * starting the handler thread.
685 */
686void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
687{
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200688 unsigned long flags;
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200689 dev_dbg(&s->dev, "parse_events: events %08x\n", events);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 if (s->thread) {
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200691 spin_lock_irqsave(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 s->thread_events |= events;
Arjan van de Ven4b7a89a2006-06-30 10:31:13 +0200693 spin_unlock_irqrestore(&s->thread_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Christoph Hellwig0b402092007-04-22 13:55:36 +0100695 wake_up_process(s->thread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 }
697} /* pcmcia_parse_events */
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700698EXPORT_SYMBOL(pcmcia_parse_events);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100700/**
701 * pcmcia_parse_uevents() - tell pccardd to issue manual commands
702 * @s: the PCMCIA socket we wan't to command
703 * @events: events to pass to pccardd
704 *
705 * userspace-issued insert, eject, suspend and resume commands must be
706 * handled by pccardd to avoid any sysfs-related deadlocks. Valid events
707 * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert),
Dominik Brodowskiaf461fc2010-01-17 19:30:53 +0100708 * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend)
709 * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card).
Dominik Brodowskif971dbd2010-01-17 18:13:31 +0100710 */
711void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events)
712{
713 unsigned long flags;
714 dev_dbg(&s->dev, "parse_uevents: events %08x\n", events);
715 if (s->thread) {
716 spin_lock_irqsave(&s->thread_lock, flags);
717 s->sysfs_events |= events;
718 spin_unlock_irqrestore(&s->thread_lock, flags);
719
720 wake_up_process(s->thread);
721 }
722}
723EXPORT_SYMBOL(pcmcia_parse_uevents);
724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726/* register pcmcia_callback */
727int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
728{
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100729 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100731 /* s->skt_mutex also protects s->callback */
732 mutex_lock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
734 if (c) {
735 /* registration */
736 if (s->callback) {
737 ret = -EBUSY;
738 goto err;
739 }
740
741 s->callback = c;
742
743 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
Dominik Brodowski7b24e792010-07-11 10:26:53 +0200744 s->callback->add(s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 } else
746 s->callback = NULL;
747 err:
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100748 mutex_unlock(&s->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
750 return ret;
751}
752EXPORT_SYMBOL(pccard_register_pcmcia);
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700755/* I'm not sure which "reset" function this is supposed to use,
756 * but for now, it uses the low-level interface's reset, not the
757 * CIS register.
758 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Dominik Brodowski994917f2008-08-31 15:20:26 +0200760int pcmcia_reset_card(struct pcmcia_socket *skt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761{
762 int ret;
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700763
Dominik Brodowskid50dbec2009-10-23 12:51:28 +0200764 dev_dbg(&skt->dev, "resetting socket\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100766 mutex_lock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 do {
768 if (!(skt->state & SOCKET_PRESENT)) {
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200769 dev_dbg(&skt->dev, "can't reset, not present\n");
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200770 ret = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 break;
772 }
773 if (skt->state & SOCKET_SUSPEND) {
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200774 dev_dbg(&skt->dev, "can't reset, suspended\n");
Dominik Brodowskif9580952008-08-03 11:40:19 +0200775 ret = -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 break;
777 }
778 if (skt->state & SOCKET_CARDBUS) {
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200779 dev_dbg(&skt->dev, "can't reset, is cardbus\n");
Dominik Brodowskide6405e2008-08-03 10:47:59 +0200780 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 break;
782 }
783
Dominik Brodowski216d7cd2010-07-11 10:04:59 +0200784 if (skt->callback)
785 skt->callback->suspend(skt);
786 mutex_lock(&skt->ops_mutex);
787 ret = socket_reset(skt);
788 mutex_unlock(&skt->ops_mutex);
789 if ((ret == 0) && (skt->callback))
790 skt->callback->resume(skt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200792 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 } while (0);
Dominik Brodowski7fe908d2006-01-10 21:20:36 +0100794 mutex_unlock(&skt->skt_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
796 return ret;
797} /* reset_card */
Dominik Brodowski994917f2008-08-31 15:20:26 +0200798EXPORT_SYMBOL(pcmcia_reset_card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Kay Sievers7eff2e72007-08-14 15:15:12 +0200801static int pcmcia_socket_uevent(struct device *dev,
802 struct kobj_uevent_env *env)
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700803{
804 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700805
Kay Sievers7eff2e72007-08-14 15:15:12 +0200806 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700807 return -ENOMEM;
808
Dominik Brodowski3ee13932005-06-27 16:28:05 -0700809 return 0;
810}
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700813static struct completion pcmcia_unload;
814
815static void pcmcia_release_socket_class(struct class *data)
816{
817 complete(&pcmcia_unload);
818}
819
820
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100821#ifdef CONFIG_PM
822
823static int __pcmcia_pm_op(struct device *dev,
824 int (*callback) (struct pcmcia_socket *skt))
825{
826 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
827 int ret;
828
829 mutex_lock(&s->skt_mutex);
830 ret = callback(s);
831 mutex_unlock(&s->skt_mutex);
832
833 return ret;
834}
835
836static int pcmcia_socket_dev_suspend_noirq(struct device *dev)
837{
838 return __pcmcia_pm_op(dev, socket_suspend);
839}
840
841static int pcmcia_socket_dev_resume_noirq(struct device *dev)
842{
843 return __pcmcia_pm_op(dev, socket_early_resume);
844}
845
Maciej Żenczykowski3c7d2b72010-10-13 21:47:14 -0700846static int __used pcmcia_socket_dev_resume(struct device *dev)
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100847{
848 return __pcmcia_pm_op(dev, socket_late_resume);
849}
850
851static const struct dev_pm_ops pcmcia_socket_pm_ops = {
852 /* dev_resume may be called with IRQs enabled */
853 SET_SYSTEM_SLEEP_PM_OPS(NULL,
854 pcmcia_socket_dev_resume)
855
856 /* late suspend must be called with IRQs disabled */
857 .suspend_noirq = pcmcia_socket_dev_suspend_noirq,
858 .freeze_noirq = pcmcia_socket_dev_suspend_noirq,
859 .poweroff_noirq = pcmcia_socket_dev_suspend_noirq,
860
861 /* early resume must be called with IRQs disabled */
862 .resume_noirq = pcmcia_socket_dev_resume_noirq,
863 .thaw_noirq = pcmcia_socket_dev_resume_noirq,
864 .restore_noirq = pcmcia_socket_dev_resume_noirq,
865};
866
867#define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops)
868
869#else /* CONFIG_PM */
870
871#define PCMCIA_SOCKET_CLASS_PM_OPS NULL
872
873#endif /* CONFIG_PM */
874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875struct class pcmcia_socket_class = {
876 .name = "pcmcia_socket",
Greg Kroah-Hartman87373312006-09-12 17:00:10 +0200877 .dev_uevent = pcmcia_socket_uevent,
878 .dev_release = pcmcia_release_socket,
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700879 .class_release = pcmcia_release_socket_class,
Dominik Brodowskid7646f72010-03-15 21:46:34 +0100880 .pm = PCMCIA_SOCKET_CLASS_PM_OPS,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881};
882EXPORT_SYMBOL(pcmcia_socket_class);
883
884
885static int __init init_pcmcia_cs(void)
886{
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700887 init_completion(&pcmcia_unload);
David Brownell4356d732008-04-28 01:03:20 -0700888 return class_register(&pcmcia_socket_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889}
890
891static void __exit exit_pcmcia_cs(void)
892{
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700893 class_unregister(&pcmcia_socket_class);
Dominik Brodowski378a33a2005-06-27 16:28:54 -0700894 wait_for_completion(&pcmcia_unload);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895}
896
897subsys_initcall(init_pcmcia_cs);
898module_exit(exit_pcmcia_cs);
899