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 spin_lock_init(&socket->lock);
180 /* try to obtain a socket number [yes, it gets ugly if we
181 * register more than 2^sizeof(unsigned int) pcmcia
182 * sockets... but the socket number is deprecated
183 * anyways, so I don't care] */
184 down_write(&pcmcia_socket_list_rwsem);
185 if (list_empty(&pcmcia_socket_list))
188 unsigned int found, i = 1;
189 struct pcmcia_socket *tmp;
192 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
198 socket->sock = i - 1;
200 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
201 up_write(&pcmcia_socket_list_rwsem);
203 #ifndef CONFIG_CARDBUS
205 * If we do not support Cardbus, ensure that
206 * the Cardbus socket capability is disabled.
208 socket->features &= ~SS_CAP_CARDBUS;
211 /* set proper values in socket->dev */
212 dev_set_drvdata(&socket->dev, socket);
213 socket->dev.class = &pcmcia_socket_class;
214 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
216 /* base address = 0, map = 0 */
217 socket->cis_mem.flags = 0;
218 socket->cis_mem.speed = cis_speed;
220 INIT_LIST_HEAD(&socket->cis_cache);
222 init_completion(&socket->socket_released);
223 init_completion(&socket->thread_done);
224 mutex_init(&socket->skt_mutex);
225 mutex_init(&socket->ops_mutex);
226 spin_lock_init(&socket->thread_lock);
228 if (socket->resource_ops->init) {
229 ret = socket->resource_ops->init(socket);
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 socket->resource_ops->exit(socket);
289 wait_for_completion(&socket->socket_released);
290 } /* pcmcia_unregister_socket */
291 EXPORT_SYMBOL(pcmcia_unregister_socket);
294 struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
296 struct pcmcia_socket *s;
298 down_read(&pcmcia_socket_list_rwsem);
299 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
301 up_read(&pcmcia_socket_list_rwsem);
304 up_read(&pcmcia_socket_list_rwsem);
309 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
312 * The central event handler. Send_event() sends an event to the
313 * 16-bit subsystem, which then calls the relevant device drivers.
314 * Parse_events() interprets the event bits from
315 * a card status change report. Do_shutdown() handles the high
316 * priority stuff associated with a card removal.
319 /* NOTE: send_event needs to be called with skt->sem held. */
321 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
325 if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
328 dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n",
329 event, priority, s->callback);
333 if (!try_module_get(s->callback->owner))
336 ret = s->callback->event(s, event, priority);
338 module_put(s->callback->owner);
343 static int socket_reset(struct pcmcia_socket *skt)
347 dev_dbg(&skt->dev, "reset\n");
349 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
350 skt->ops->set_socket(skt, &skt->socket);
351 udelay((long)reset_time);
353 skt->socket.flags &= ~SS_RESET;
354 skt->ops->set_socket(skt, &skt->socket);
356 msleep(unreset_delay * 10);
357 for (i = 0; i < unreset_limit; i++) {
358 skt->ops->get_status(skt, &status);
360 if (!(status & SS_DETECT))
363 if (status & SS_READY)
366 msleep(unreset_check * 10);
369 dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n");
374 * socket_setup() and socket_shutdown() are called by the main event handler
375 * when card insertion and removal events are received.
376 * socket_setup() turns on socket power and resets the socket, in two stages.
377 * socket_shutdown() unconfigures a socket and turns off socket power.
379 static void socket_shutdown(struct pcmcia_socket *s)
383 dev_dbg(&s->dev, "shutdown\n");
385 send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
387 mutex_lock(&s->ops_mutex);
388 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
389 msleep(shutdown_delay * 10);
390 s->state &= SOCKET_INUSE;
392 /* Blank out the socket state */
393 s->socket = dead_socket;
395 s->ops->set_socket(s, &s->socket);
396 s->irq.AssignedIRQ = s->irq.Config = 0;
400 #ifdef CONFIG_CARDBUS
405 /* give socket some time to power down */
408 s->ops->get_status(s, &status);
409 if (status & SS_POWERON) {
410 dev_printk(KERN_ERR, &s->dev,
411 "*** DANGER *** unable to remove socket power\n");
414 s->state &= ~SOCKET_INUSE;
415 mutex_unlock(&s->ops_mutex);
418 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
422 dev_dbg(&skt->dev, "setup\n");
424 skt->ops->get_status(skt, &status);
425 if (!(status & SS_DETECT))
428 msleep(initial_delay * 10);
430 for (i = 0; i < 100; i++) {
431 skt->ops->get_status(skt, &status);
432 if (!(status & SS_DETECT))
435 if (!(status & SS_PENDING))
441 if (status & SS_PENDING) {
442 dev_printk(KERN_ERR, &skt->dev,
443 "voltage interrogation timed out.\n");
447 if (status & SS_CARDBUS) {
448 if (!(skt->features & SS_CAP_CARDBUS)) {
449 dev_printk(KERN_ERR, &skt->dev,
450 "cardbus cards are not supported.\n");
453 skt->state |= SOCKET_CARDBUS;
455 skt->state &= ~SOCKET_CARDBUS;
458 * Decode the card voltage requirements, and apply power to the card.
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;
465 dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n");
470 skt->power_hook(skt, HOOK_POWER_PRE);
472 skt->socket.flags = 0;
473 skt->ops->set_socket(skt, &skt->socket);
476 * Wait "vcc_settle" for the supply to stabilise.
478 msleep(vcc_settle * 10);
480 skt->ops->get_status(skt, &status);
481 if (!(status & SS_POWERON)) {
482 dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n");
486 status = socket_reset(skt);
489 skt->power_hook(skt, HOOK_POWER_POST);
495 * Handle card insertion. Setup the socket, reset the card,
496 * and then tell the rest of PCMCIA that a card is present.
498 static int socket_insert(struct pcmcia_socket *skt)
502 dev_dbg(&skt->dev, "insert\n");
504 mutex_lock(&skt->ops_mutex);
505 WARN_ON(skt->state & SOCKET_INUSE);
506 skt->state |= SOCKET_INUSE;
508 ret = socket_setup(skt, setup_delay);
510 skt->state |= SOCKET_PRESENT;
512 dev_printk(KERN_NOTICE, &skt->dev,
513 "pccard: %s card inserted into slot %d\n",
514 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
517 #ifdef CONFIG_CARDBUS
518 if (skt->state & SOCKET_CARDBUS) {
520 skt->state |= SOCKET_CARDBUS_CONFIG;
523 dev_dbg(&skt->dev, "insert done\n");
524 mutex_unlock(&skt->ops_mutex);
526 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
528 mutex_unlock(&skt->ops_mutex);
529 socket_shutdown(skt);
535 static int socket_suspend(struct pcmcia_socket *skt)
537 if (skt->state & SOCKET_SUSPEND)
540 mutex_lock(&skt->ops_mutex);
541 skt->suspended_state = skt->state;
543 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
544 skt->socket = dead_socket;
545 skt->ops->set_socket(skt, &skt->socket);
546 if (skt->ops->suspend)
547 skt->ops->suspend(skt);
548 skt->state |= SOCKET_SUSPEND;
549 mutex_unlock(&skt->ops_mutex);
553 static int socket_early_resume(struct pcmcia_socket *skt)
555 mutex_lock(&skt->ops_mutex);
556 skt->socket = dead_socket;
558 skt->ops->set_socket(skt, &skt->socket);
559 if (skt->state & SOCKET_PRESENT)
560 skt->resume_status = socket_setup(skt, resume_delay);
561 mutex_unlock(&skt->ops_mutex);
565 static int socket_late_resume(struct pcmcia_socket *skt)
567 mutex_lock(&skt->ops_mutex);
568 skt->state &= ~SOCKET_SUSPEND;
569 mutex_unlock(&skt->ops_mutex);
571 if (!(skt->state & SOCKET_PRESENT))
572 return socket_insert(skt);
574 if (skt->resume_status) {
575 socket_shutdown(skt);
579 if (skt->suspended_state != skt->state) {
581 "suspend state 0x%x != resume state 0x%x\n",
582 skt->suspended_state, skt->state);
584 socket_shutdown(skt);
585 return socket_insert(skt);
588 #ifdef CONFIG_CARDBUS
589 if (skt->state & SOCKET_CARDBUS) {
590 /* We can't be sure the CardBus card is the same
591 * as the one previously inserted. Therefore, remove
599 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
604 * Resume a socket. If a card is present, verify its CIS against
605 * our cached copy. If they are different, the card has been
606 * replaced, and we need to tell the drivers.
608 static int socket_resume(struct pcmcia_socket *skt)
610 if (!(skt->state & SOCKET_SUSPEND))
613 socket_early_resume(skt);
614 return socket_late_resume(skt);
617 static void socket_remove(struct pcmcia_socket *skt)
619 dev_printk(KERN_NOTICE, &skt->dev,
620 "pccard: card ejected from slot %d\n", skt->sock);
621 socket_shutdown(skt);
625 * Process a socket card detect status change.
627 * If we don't have a card already present, delay the detect event for
628 * about 20ms (to be on the safe side) before reading the socket status.
630 * Some i82365-based systems send multiple SS_DETECT events during card
631 * insertion, and the "card present" status bit seems to bounce. This
632 * will probably be true with GPIO-based card detection systems after
633 * the product has aged.
635 static void socket_detect_change(struct pcmcia_socket *skt)
637 if (!(skt->state & SOCKET_SUSPEND)) {
640 if (!(skt->state & SOCKET_PRESENT))
643 skt->ops->get_status(skt, &status);
644 if ((skt->state & SOCKET_PRESENT) &&
645 !(status & SS_DETECT))
647 if (!(skt->state & SOCKET_PRESENT) &&
648 (status & SS_DETECT))
653 static int pccardd(void *__skt)
655 struct pcmcia_socket *skt = __skt;
658 skt->thread = current;
659 skt->socket = dead_socket;
661 skt->ops->set_socket(skt, &skt->socket);
663 /* register with the device core */
664 ret = device_register(&skt->dev);
666 dev_printk(KERN_WARNING, &skt->dev,
667 "PCMCIA: unable to register socket\n");
669 complete(&skt->thread_done);
672 ret = pccard_sysfs_add_socket(&skt->dev);
674 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
676 complete(&skt->thread_done);
683 set_current_state(TASK_INTERRUPTIBLE);
685 spin_lock_irqsave(&skt->thread_lock, flags);
686 events = skt->thread_events;
687 skt->thread_events = 0;
688 spin_unlock_irqrestore(&skt->thread_lock, flags);
691 mutex_lock(&skt->skt_mutex);
692 if (events & SS_DETECT)
693 socket_detect_change(skt);
694 if (events & SS_BATDEAD)
695 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
696 if (events & SS_BATWARN)
697 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
698 if (events & SS_READY)
699 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
700 mutex_unlock(&skt->skt_mutex);
704 if (kthread_should_stop())
710 /* make sure we are running before we exit */
711 set_current_state(TASK_RUNNING);
713 /* shut down socket, if a device is still present */
714 if (skt->state & SOCKET_PRESENT) {
715 mutex_lock(&skt->skt_mutex);
717 mutex_unlock(&skt->skt_mutex);
720 /* remove from the device core */
721 pccard_sysfs_remove_socket(&skt->dev);
722 device_unregister(&skt->dev);
728 * Yenta (at least) probes interrupts before registering the socket and
729 * starting the handler thread.
731 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
734 dev_dbg(&s->dev, "parse_events: events %08x\n", events);
736 spin_lock_irqsave(&s->thread_lock, flags);
737 s->thread_events |= events;
738 spin_unlock_irqrestore(&s->thread_lock, flags);
740 wake_up_process(s->thread);
742 } /* pcmcia_parse_events */
743 EXPORT_SYMBOL(pcmcia_parse_events);
746 /* register pcmcia_callback */
747 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
751 /* s->skt_mutex also protects s->callback */
752 mutex_lock(&s->skt_mutex);
763 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
764 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
768 mutex_unlock(&s->skt_mutex);
772 EXPORT_SYMBOL(pccard_register_pcmcia);
775 /* I'm not sure which "reset" function this is supposed to use,
776 * but for now, it uses the low-level interface's reset, not the
780 int pcmcia_reset_card(struct pcmcia_socket *skt)
784 dev_dbg(&skt->dev, "resetting socket\n");
786 mutex_lock(&skt->skt_mutex);
788 if (!(skt->state & SOCKET_PRESENT)) {
789 dev_dbg(&skt->dev, "can't reset, not present\n");
793 if (skt->state & SOCKET_SUSPEND) {
794 dev_dbg(&skt->dev, "can't reset, suspended\n");
798 if (skt->state & SOCKET_CARDBUS) {
799 dev_dbg(&skt->dev, "can't reset, is cardbus\n");
804 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
806 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
808 skt->callback->suspend(skt);
809 mutex_lock(&skt->ops_mutex);
810 ret = socket_reset(skt);
811 mutex_unlock(&skt->ops_mutex);
813 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
815 skt->callback->resume(skt);
821 mutex_unlock(&skt->skt_mutex);
825 EXPORT_SYMBOL(pcmcia_reset_card);
828 /* These shut down or wake up a socket. They are sort of user
829 * initiated versions of the APM suspend and resume actions.
831 int pcmcia_suspend_card(struct pcmcia_socket *skt)
835 dev_dbg(&skt->dev, "suspending socket\n");
837 mutex_lock(&skt->skt_mutex);
839 if (!(skt->state & SOCKET_PRESENT)) {
843 if (skt->state & SOCKET_CARDBUS) {
848 ret = skt->callback->suspend(skt);
852 ret = socket_suspend(skt);
854 mutex_unlock(&skt->skt_mutex);
858 EXPORT_SYMBOL(pcmcia_suspend_card);
861 int pcmcia_resume_card(struct pcmcia_socket *skt)
865 dev_dbg(&skt->dev, "waking up socket\n");
867 mutex_lock(&skt->skt_mutex);
869 if (!(skt->state & SOCKET_PRESENT)) {
873 if (skt->state & SOCKET_CARDBUS) {
877 ret = socket_resume(skt);
878 if (!ret && skt->callback)
879 skt->callback->resume(skt);
881 mutex_unlock(&skt->skt_mutex);
885 EXPORT_SYMBOL(pcmcia_resume_card);
888 /* These handle user requests to eject or insert a card. */
889 int pcmcia_eject_card(struct pcmcia_socket *skt)
893 dev_dbg(&skt->dev, "user eject request\n");
895 mutex_lock(&skt->skt_mutex);
897 if (!(skt->state & SOCKET_PRESENT)) {
902 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
911 mutex_unlock(&skt->skt_mutex);
915 EXPORT_SYMBOL(pcmcia_eject_card);
918 int pcmcia_insert_card(struct pcmcia_socket *skt)
922 dev_dbg(&skt->dev, "user insert request\n");
924 mutex_lock(&skt->skt_mutex);
926 if (skt->state & SOCKET_PRESENT) {
930 if (socket_insert(skt) == -ENODEV) {
936 mutex_unlock(&skt->skt_mutex);
940 EXPORT_SYMBOL(pcmcia_insert_card);
943 static int pcmcia_socket_uevent(struct device *dev,
944 struct kobj_uevent_env *env)
946 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
948 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
955 static struct completion pcmcia_unload;
957 static void pcmcia_release_socket_class(struct class *data)
959 complete(&pcmcia_unload);
963 struct class pcmcia_socket_class = {
964 .name = "pcmcia_socket",
965 .dev_uevent = pcmcia_socket_uevent,
966 .dev_release = pcmcia_release_socket,
967 .class_release = pcmcia_release_socket_class,
969 EXPORT_SYMBOL(pcmcia_socket_class);
972 static int __init init_pcmcia_cs(void)
974 init_completion(&pcmcia_unload);
975 return class_register(&pcmcia_socket_class);
978 static void __exit exit_pcmcia_cs(void)
980 class_unregister(&pcmcia_socket_class);
981 wait_for_completion(&pcmcia_unload);
984 subsys_initcall(init_pcmcia_cs);
985 module_exit(exit_pcmcia_cs);