2 * cs.c -- Kernel Card Services - core services
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.
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.
12 * (C) 1999 David A. Hinds
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/major.h>
21 #include <linux/errno.h>
22 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/timer.h>
26 #include <linux/ioport.h>
27 #include <linux/delay.h>
29 #include <linux/device.h>
30 #include <linux/kthread.h>
31 #include <linux/freezer.h>
32 #include <asm/system.h>
35 #include <pcmcia/cs_types.h>
36 #include <pcmcia/ss.h>
37 #include <pcmcia/cs.h>
38 #include <pcmcia/cistpl.h>
39 #include <pcmcia/cisreg.h>
40 #include <pcmcia/ds.h>
41 #include "cs_internal.h"
44 /* Module parameters */
46 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
47 MODULE_DESCRIPTION("Linux Kernel Card Services");
48 MODULE_LICENSE("GPL");
50 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
52 INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
53 INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
54 INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
55 INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
56 INT_MODULE_PARM(reset_time, 10); /* usecs */
57 INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
58 INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
59 INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
61 /* Access speed for attribute memory windows */
62 INT_MODULE_PARM(cis_speed, 300); /* ns */
65 socket_state_t dead_socket = {
66 .csc_mask = SS_DETECT,
68 EXPORT_SYMBOL(dead_socket);
71 /* List of all sockets, protected by a rwsem */
72 LIST_HEAD(pcmcia_socket_list);
73 EXPORT_SYMBOL(pcmcia_socket_list);
75 DECLARE_RWSEM(pcmcia_socket_list_rwsem);
76 EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
80 * Low-level PCMCIA socket drivers need to register with the PCCard
81 * core using pcmcia_register_socket.
83 * socket drivers are expected to use the following callbacks in their
85 * - pcmcia_socket_dev_suspend
86 * - pcmcia_socket_dev_resume
87 * These functions check for the appropriate struct pcmcia_soket arrays,
88 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
90 static int socket_early_resume(struct pcmcia_socket *skt);
91 static int socket_late_resume(struct pcmcia_socket *skt);
92 static int socket_resume(struct pcmcia_socket *skt);
93 static int socket_suspend(struct pcmcia_socket *skt);
95 static void pcmcia_socket_dev_run(struct device *dev,
96 int (*cb)(struct pcmcia_socket *))
98 struct pcmcia_socket *socket;
100 down_read(&pcmcia_socket_list_rwsem);
101 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
102 if (socket->dev.parent != dev)
104 mutex_lock(&socket->skt_mutex);
106 mutex_unlock(&socket->skt_mutex);
108 up_read(&pcmcia_socket_list_rwsem);
111 int pcmcia_socket_dev_suspend(struct device *dev)
113 pcmcia_socket_dev_run(dev, socket_suspend);
116 EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
118 void pcmcia_socket_dev_early_resume(struct device *dev)
120 pcmcia_socket_dev_run(dev, socket_early_resume);
122 EXPORT_SYMBOL(pcmcia_socket_dev_early_resume);
124 void pcmcia_socket_dev_late_resume(struct device *dev)
126 pcmcia_socket_dev_run(dev, socket_late_resume);
128 EXPORT_SYMBOL(pcmcia_socket_dev_late_resume);
130 int pcmcia_socket_dev_resume(struct device *dev)
132 pcmcia_socket_dev_run(dev, socket_resume);
135 EXPORT_SYMBOL(pcmcia_socket_dev_resume);
138 struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt)
140 struct device *dev = get_device(&skt->dev);
143 return dev_get_drvdata(dev);
145 EXPORT_SYMBOL(pcmcia_get_socket);
148 void pcmcia_put_socket(struct pcmcia_socket *skt)
150 put_device(&skt->dev);
152 EXPORT_SYMBOL(pcmcia_put_socket);
155 static void pcmcia_release_socket(struct device *dev)
157 struct pcmcia_socket *socket = dev_get_drvdata(dev);
159 complete(&socket->socket_released);
162 static int pccardd(void *__skt);
165 * pcmcia_register_socket - add a new pcmcia socket device
166 * @socket: the &socket to register
168 int pcmcia_register_socket(struct pcmcia_socket *socket)
170 struct task_struct *tsk;
173 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
176 dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops);
178 /* try to obtain a socket number [yes, it gets ugly if we
179 * register more than 2^sizeof(unsigned int) pcmcia
180 * sockets... but the socket number is deprecated
181 * anyways, so I don't care] */
182 down_write(&pcmcia_socket_list_rwsem);
183 if (list_empty(&pcmcia_socket_list))
186 unsigned int found, i = 1;
187 struct pcmcia_socket *tmp;
190 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
196 socket->sock = i - 1;
198 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
199 up_write(&pcmcia_socket_list_rwsem);
201 #ifndef CONFIG_CARDBUS
203 * If we do not support Cardbus, ensure that
204 * the Cardbus socket capability is disabled.
206 socket->features &= ~SS_CAP_CARDBUS;
209 /* set proper values in socket->dev */
210 dev_set_drvdata(&socket->dev, socket);
211 socket->dev.class = &pcmcia_socket_class;
212 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
214 /* base address = 0, map = 0 */
215 socket->cis_mem.flags = 0;
216 socket->cis_mem.speed = cis_speed;
218 INIT_LIST_HEAD(&socket->cis_cache);
220 init_completion(&socket->socket_released);
221 init_completion(&socket->thread_done);
222 mutex_init(&socket->skt_mutex);
223 mutex_init(&socket->ops_mutex);
224 spin_lock_init(&socket->thread_lock);
226 if (socket->resource_ops->init) {
227 mutex_lock(&socket->ops_mutex);
228 ret = socket->resource_ops->init(socket);
229 mutex_unlock(&socket->ops_mutex);
234 tsk = kthread_run(pccardd, socket, "pccardd");
240 wait_for_completion(&socket->thread_done);
241 if (!socket->thread) {
242 dev_printk(KERN_WARNING, &socket->dev,
243 "PCMCIA: warning: socket thread did not start\n");
247 pcmcia_parse_events(socket, SS_DETECT);
250 * Let's try to get the PCMCIA module for 16-bit PCMCIA support.
251 * If it fails, it doesn't matter -- we still have 32-bit CardBus
252 * support to offer, so this is not a failure mode.
254 request_module_nowait("pcmcia");
259 down_write(&pcmcia_socket_list_rwsem);
260 list_del(&socket->socket_list);
261 up_write(&pcmcia_socket_list_rwsem);
263 } /* pcmcia_register_socket */
264 EXPORT_SYMBOL(pcmcia_register_socket);
268 * pcmcia_unregister_socket - remove a pcmcia socket device
269 * @socket: the &socket to unregister
271 void pcmcia_unregister_socket(struct pcmcia_socket *socket)
276 dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
279 kthread_stop(socket->thread);
281 /* remove from our own list */
282 down_write(&pcmcia_socket_list_rwsem);
283 list_del(&socket->socket_list);
284 up_write(&pcmcia_socket_list_rwsem);
286 /* wait for sysfs to drop all references */
287 if (socket->resource_ops->exit) {
288 mutex_lock(&socket->ops_mutex);
289 socket->resource_ops->exit(socket);
290 mutex_unlock(&socket->ops_mutex);
292 wait_for_completion(&socket->socket_released);
293 } /* pcmcia_unregister_socket */
294 EXPORT_SYMBOL(pcmcia_unregister_socket);
297 struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
299 struct pcmcia_socket *s;
301 down_read(&pcmcia_socket_list_rwsem);
302 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
304 up_read(&pcmcia_socket_list_rwsem);
307 up_read(&pcmcia_socket_list_rwsem);
312 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
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.
322 /* NOTE: send_event needs to be called with skt->sem held. */
324 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
328 if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
331 dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n",
332 event, priority, s->callback);
336 if (!try_module_get(s->callback->owner))
339 ret = s->callback->event(s, event, priority);
341 module_put(s->callback->owner);
346 static int socket_reset(struct pcmcia_socket *skt)
350 dev_dbg(&skt->dev, "reset\n");
352 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
353 skt->ops->set_socket(skt, &skt->socket);
354 udelay((long)reset_time);
356 skt->socket.flags &= ~SS_RESET;
357 skt->ops->set_socket(skt, &skt->socket);
359 msleep(unreset_delay * 10);
360 for (i = 0; i < unreset_limit; i++) {
361 skt->ops->get_status(skt, &status);
363 if (!(status & SS_DETECT))
366 if (status & SS_READY)
369 msleep(unreset_check * 10);
372 dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n");
377 * socket_setup() and socket_shutdown() are called by the main event handler
378 * when card insertion and removal events are received.
379 * socket_setup() turns on socket power and resets the socket, in two stages.
380 * socket_shutdown() unconfigures a socket and turns off socket power.
382 static void socket_shutdown(struct pcmcia_socket *s)
386 dev_dbg(&s->dev, "shutdown\n");
388 send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
390 mutex_lock(&s->ops_mutex);
391 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
392 msleep(shutdown_delay * 10);
393 s->state &= SOCKET_INUSE;
395 /* Blank out the socket state */
396 s->socket = dead_socket;
398 s->ops->set_socket(s, &s->socket);
399 s->irq.AssignedIRQ = s->irq.Config = 0;
403 #ifdef CONFIG_CARDBUS
408 /* give socket some time to power down */
411 s->ops->get_status(s, &status);
412 if (status & SS_POWERON) {
413 dev_printk(KERN_ERR, &s->dev,
414 "*** DANGER *** unable to remove socket power\n");
417 s->state &= ~SOCKET_INUSE;
418 mutex_unlock(&s->ops_mutex);
421 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
425 dev_dbg(&skt->dev, "setup\n");
427 skt->ops->get_status(skt, &status);
428 if (!(status & SS_DETECT))
431 msleep(initial_delay * 10);
433 for (i = 0; i < 100; i++) {
434 skt->ops->get_status(skt, &status);
435 if (!(status & SS_DETECT))
438 if (!(status & SS_PENDING))
444 if (status & SS_PENDING) {
445 dev_printk(KERN_ERR, &skt->dev,
446 "voltage interrogation timed out.\n");
450 if (status & SS_CARDBUS) {
451 if (!(skt->features & SS_CAP_CARDBUS)) {
452 dev_printk(KERN_ERR, &skt->dev,
453 "cardbus cards are not supported.\n");
456 skt->state |= SOCKET_CARDBUS;
458 skt->state &= ~SOCKET_CARDBUS;
461 * Decode the card voltage requirements, and apply power to the card.
463 if (status & SS_3VCARD)
464 skt->socket.Vcc = skt->socket.Vpp = 33;
465 else if (!(status & SS_XVCARD))
466 skt->socket.Vcc = skt->socket.Vpp = 50;
468 dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n");
473 skt->power_hook(skt, HOOK_POWER_PRE);
475 skt->socket.flags = 0;
476 skt->ops->set_socket(skt, &skt->socket);
479 * Wait "vcc_settle" for the supply to stabilise.
481 msleep(vcc_settle * 10);
483 skt->ops->get_status(skt, &status);
484 if (!(status & SS_POWERON)) {
485 dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n");
489 status = socket_reset(skt);
492 skt->power_hook(skt, HOOK_POWER_POST);
498 * Handle card insertion. Setup the socket, reset the card,
499 * and then tell the rest of PCMCIA that a card is present.
501 static int socket_insert(struct pcmcia_socket *skt)
505 dev_dbg(&skt->dev, "insert\n");
507 mutex_lock(&skt->ops_mutex);
508 WARN_ON(skt->state & SOCKET_INUSE);
509 skt->state |= SOCKET_INUSE;
511 ret = socket_setup(skt, setup_delay);
513 skt->state |= SOCKET_PRESENT;
515 dev_printk(KERN_NOTICE, &skt->dev,
516 "pccard: %s card inserted into slot %d\n",
517 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
520 #ifdef CONFIG_CARDBUS
521 if (skt->state & SOCKET_CARDBUS) {
523 skt->state |= SOCKET_CARDBUS_CONFIG;
526 dev_dbg(&skt->dev, "insert done\n");
527 mutex_unlock(&skt->ops_mutex);
529 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
531 mutex_unlock(&skt->ops_mutex);
532 socket_shutdown(skt);
538 static int socket_suspend(struct pcmcia_socket *skt)
540 if (skt->state & SOCKET_SUSPEND)
543 mutex_lock(&skt->ops_mutex);
544 skt->suspended_state = skt->state;
546 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
547 skt->socket = dead_socket;
548 skt->ops->set_socket(skt, &skt->socket);
549 if (skt->ops->suspend)
550 skt->ops->suspend(skt);
551 skt->state |= SOCKET_SUSPEND;
552 mutex_unlock(&skt->ops_mutex);
556 static int socket_early_resume(struct pcmcia_socket *skt)
558 mutex_lock(&skt->ops_mutex);
559 skt->socket = dead_socket;
561 skt->ops->set_socket(skt, &skt->socket);
562 if (skt->state & SOCKET_PRESENT)
563 skt->resume_status = socket_setup(skt, resume_delay);
564 mutex_unlock(&skt->ops_mutex);
568 static int socket_late_resume(struct pcmcia_socket *skt)
570 mutex_lock(&skt->ops_mutex);
571 skt->state &= ~SOCKET_SUSPEND;
572 mutex_unlock(&skt->ops_mutex);
574 if (!(skt->state & SOCKET_PRESENT))
575 return socket_insert(skt);
577 if (skt->resume_status) {
578 socket_shutdown(skt);
582 if (skt->suspended_state != skt->state) {
584 "suspend state 0x%x != resume state 0x%x\n",
585 skt->suspended_state, skt->state);
587 socket_shutdown(skt);
588 return socket_insert(skt);
591 #ifdef CONFIG_CARDBUS
592 if (skt->state & SOCKET_CARDBUS) {
593 /* We can't be sure the CardBus card is the same
594 * as the one previously inserted. Therefore, remove
602 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
607 * Resume a socket. If a card is present, verify its CIS against
608 * our cached copy. If they are different, the card has been
609 * replaced, and we need to tell the drivers.
611 static int socket_resume(struct pcmcia_socket *skt)
613 if (!(skt->state & SOCKET_SUSPEND))
616 socket_early_resume(skt);
617 return socket_late_resume(skt);
620 static void socket_remove(struct pcmcia_socket *skt)
622 dev_printk(KERN_NOTICE, &skt->dev,
623 "pccard: card ejected from slot %d\n", skt->sock);
624 socket_shutdown(skt);
628 * Process a socket card detect status change.
630 * If we don't have a card already present, delay the detect event for
631 * about 20ms (to be on the safe side) before reading the socket status.
633 * Some i82365-based systems send multiple SS_DETECT events during card
634 * insertion, and the "card present" status bit seems to bounce. This
635 * will probably be true with GPIO-based card detection systems after
636 * the product has aged.
638 static void socket_detect_change(struct pcmcia_socket *skt)
640 if (!(skt->state & SOCKET_SUSPEND)) {
643 if (!(skt->state & SOCKET_PRESENT))
646 skt->ops->get_status(skt, &status);
647 if ((skt->state & SOCKET_PRESENT) &&
648 !(status & SS_DETECT))
650 if (!(skt->state & SOCKET_PRESENT) &&
651 (status & SS_DETECT))
656 static int pccardd(void *__skt)
658 struct pcmcia_socket *skt = __skt;
661 skt->thread = current;
662 skt->socket = dead_socket;
664 skt->ops->set_socket(skt, &skt->socket);
666 /* register with the device core */
667 ret = device_register(&skt->dev);
669 dev_printk(KERN_WARNING, &skt->dev,
670 "PCMCIA: unable to register socket\n");
672 complete(&skt->thread_done);
675 ret = pccard_sysfs_add_socket(&skt->dev);
677 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
679 complete(&skt->thread_done);
686 set_current_state(TASK_INTERRUPTIBLE);
688 spin_lock_irqsave(&skt->thread_lock, flags);
689 events = skt->thread_events;
690 skt->thread_events = 0;
691 spin_unlock_irqrestore(&skt->thread_lock, flags);
694 mutex_lock(&skt->skt_mutex);
695 if (events & SS_DETECT)
696 socket_detect_change(skt);
697 if (events & SS_BATDEAD)
698 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
699 if (events & SS_BATWARN)
700 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
701 if (events & SS_READY)
702 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
703 mutex_unlock(&skt->skt_mutex);
707 if (kthread_should_stop())
713 /* make sure we are running before we exit */
714 set_current_state(TASK_RUNNING);
716 /* shut down socket, if a device is still present */
717 if (skt->state & SOCKET_PRESENT) {
718 mutex_lock(&skt->skt_mutex);
720 mutex_unlock(&skt->skt_mutex);
723 /* remove from the device core */
724 pccard_sysfs_remove_socket(&skt->dev);
725 device_unregister(&skt->dev);
731 * Yenta (at least) probes interrupts before registering the socket and
732 * starting the handler thread.
734 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
737 dev_dbg(&s->dev, "parse_events: events %08x\n", events);
739 spin_lock_irqsave(&s->thread_lock, flags);
740 s->thread_events |= events;
741 spin_unlock_irqrestore(&s->thread_lock, flags);
743 wake_up_process(s->thread);
745 } /* pcmcia_parse_events */
746 EXPORT_SYMBOL(pcmcia_parse_events);
749 /* register pcmcia_callback */
750 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
754 /* s->skt_mutex also protects s->callback */
755 mutex_lock(&s->skt_mutex);
766 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
767 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
771 mutex_unlock(&s->skt_mutex);
775 EXPORT_SYMBOL(pccard_register_pcmcia);
778 /* I'm not sure which "reset" function this is supposed to use,
779 * but for now, it uses the low-level interface's reset, not the
783 int pcmcia_reset_card(struct pcmcia_socket *skt)
787 dev_dbg(&skt->dev, "resetting socket\n");
789 mutex_lock(&skt->skt_mutex);
791 if (!(skt->state & SOCKET_PRESENT)) {
792 dev_dbg(&skt->dev, "can't reset, not present\n");
796 if (skt->state & SOCKET_SUSPEND) {
797 dev_dbg(&skt->dev, "can't reset, suspended\n");
801 if (skt->state & SOCKET_CARDBUS) {
802 dev_dbg(&skt->dev, "can't reset, is cardbus\n");
807 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
809 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
811 skt->callback->suspend(skt);
812 mutex_lock(&skt->ops_mutex);
813 ret = socket_reset(skt);
814 mutex_unlock(&skt->ops_mutex);
816 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
818 skt->callback->resume(skt);
824 mutex_unlock(&skt->skt_mutex);
828 EXPORT_SYMBOL(pcmcia_reset_card);
831 /* These shut down or wake up a socket. They are sort of user
832 * initiated versions of the APM suspend and resume actions.
834 int pcmcia_suspend_card(struct pcmcia_socket *skt)
838 dev_dbg(&skt->dev, "suspending socket\n");
840 mutex_lock(&skt->skt_mutex);
842 if (!(skt->state & SOCKET_PRESENT)) {
846 if (skt->state & SOCKET_CARDBUS) {
851 ret = skt->callback->suspend(skt);
855 ret = socket_suspend(skt);
857 mutex_unlock(&skt->skt_mutex);
861 EXPORT_SYMBOL(pcmcia_suspend_card);
864 int pcmcia_resume_card(struct pcmcia_socket *skt)
868 dev_dbg(&skt->dev, "waking up socket\n");
870 mutex_lock(&skt->skt_mutex);
872 if (!(skt->state & SOCKET_PRESENT)) {
876 if (skt->state & SOCKET_CARDBUS) {
880 ret = socket_resume(skt);
881 if (!ret && skt->callback)
882 skt->callback->resume(skt);
884 mutex_unlock(&skt->skt_mutex);
888 EXPORT_SYMBOL(pcmcia_resume_card);
891 /* These handle user requests to eject or insert a card. */
892 int pcmcia_eject_card(struct pcmcia_socket *skt)
896 dev_dbg(&skt->dev, "user eject request\n");
898 mutex_lock(&skt->skt_mutex);
900 if (!(skt->state & SOCKET_PRESENT)) {
905 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
914 mutex_unlock(&skt->skt_mutex);
918 EXPORT_SYMBOL(pcmcia_eject_card);
921 int pcmcia_insert_card(struct pcmcia_socket *skt)
925 dev_dbg(&skt->dev, "user insert request\n");
927 mutex_lock(&skt->skt_mutex);
929 if (skt->state & SOCKET_PRESENT) {
933 if (socket_insert(skt) == -ENODEV) {
939 mutex_unlock(&skt->skt_mutex);
943 EXPORT_SYMBOL(pcmcia_insert_card);
946 static int pcmcia_socket_uevent(struct device *dev,
947 struct kobj_uevent_env *env)
949 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
951 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
958 static struct completion pcmcia_unload;
960 static void pcmcia_release_socket_class(struct class *data)
962 complete(&pcmcia_unload);
966 struct class pcmcia_socket_class = {
967 .name = "pcmcia_socket",
968 .dev_uevent = pcmcia_socket_uevent,
969 .dev_release = pcmcia_release_socket,
970 .class_release = pcmcia_release_socket_class,
972 EXPORT_SYMBOL(pcmcia_socket_class);
975 static int __init init_pcmcia_cs(void)
977 init_completion(&pcmcia_unload);
978 return class_register(&pcmcia_socket_class);
981 static void __exit exit_pcmcia_cs(void)
983 class_unregister(&pcmcia_socket_class);
984 wait_for_completion(&pcmcia_unload);
987 subsys_initcall(init_pcmcia_cs);
988 module_exit(exit_pcmcia_cs);