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 */
64 #ifdef CONFIG_PCMCIA_DEBUG
67 module_param(pc_debug, int, 0644);
69 int cs_debug_level(int level)
71 return pc_debug > level;
76 socket_state_t dead_socket = {
77 .csc_mask = SS_DETECT,
79 EXPORT_SYMBOL(dead_socket);
82 /* List of all sockets, protected by a rwsem */
83 LIST_HEAD(pcmcia_socket_list);
84 EXPORT_SYMBOL(pcmcia_socket_list);
86 DECLARE_RWSEM(pcmcia_socket_list_rwsem);
87 EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
91 * Low-level PCMCIA socket drivers need to register with the PCCard
92 * core using pcmcia_register_socket.
94 * socket drivers are expected to use the following callbacks in their
96 * - pcmcia_socket_dev_suspend
97 * - pcmcia_socket_dev_resume
98 * These functions check for the appropriate struct pcmcia_soket arrays,
99 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
101 static int socket_early_resume(struct pcmcia_socket *skt);
102 static int socket_late_resume(struct pcmcia_socket *skt);
103 static int socket_resume(struct pcmcia_socket *skt);
104 static int socket_suspend(struct pcmcia_socket *skt);
106 static void pcmcia_socket_dev_run(struct device *dev,
107 int (*cb)(struct pcmcia_socket *))
109 struct pcmcia_socket *socket;
111 down_read(&pcmcia_socket_list_rwsem);
112 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
113 if (socket->dev.parent != dev)
115 mutex_lock(&socket->skt_mutex);
117 mutex_unlock(&socket->skt_mutex);
119 up_read(&pcmcia_socket_list_rwsem);
122 int pcmcia_socket_dev_suspend(struct device *dev)
124 pcmcia_socket_dev_run(dev, socket_suspend);
127 EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
129 void pcmcia_socket_dev_early_resume(struct device *dev)
131 pcmcia_socket_dev_run(dev, socket_early_resume);
133 EXPORT_SYMBOL(pcmcia_socket_dev_early_resume);
135 void pcmcia_socket_dev_late_resume(struct device *dev)
137 pcmcia_socket_dev_run(dev, socket_late_resume);
139 EXPORT_SYMBOL(pcmcia_socket_dev_late_resume);
141 int pcmcia_socket_dev_resume(struct device *dev)
143 pcmcia_socket_dev_run(dev, socket_resume);
146 EXPORT_SYMBOL(pcmcia_socket_dev_resume);
149 struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
151 struct device *dev = get_device(&skt->dev);
154 skt = dev_get_drvdata(dev);
155 if (!try_module_get(skt->owner)) {
156 put_device(&skt->dev);
161 EXPORT_SYMBOL(pcmcia_get_socket);
164 void pcmcia_put_socket(struct pcmcia_socket *skt)
166 module_put(skt->owner);
167 put_device(&skt->dev);
169 EXPORT_SYMBOL(pcmcia_put_socket);
172 static void pcmcia_release_socket(struct device *dev)
174 struct pcmcia_socket *socket = dev_get_drvdata(dev);
176 complete(&socket->socket_released);
179 static int pccardd(void *__skt);
182 * pcmcia_register_socket - add a new pcmcia socket device
183 * @socket: the &socket to register
185 int pcmcia_register_socket(struct pcmcia_socket *socket)
187 struct task_struct *tsk;
190 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
193 cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
195 spin_lock_init(&socket->lock);
197 /* try to obtain a socket number [yes, it gets ugly if we
198 * register more than 2^sizeof(unsigned int) pcmcia
199 * sockets... but the socket number is deprecated
200 * anyways, so I don't care] */
201 down_write(&pcmcia_socket_list_rwsem);
202 if (list_empty(&pcmcia_socket_list))
205 unsigned int found, i = 1;
206 struct pcmcia_socket *tmp;
209 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
215 socket->sock = i - 1;
217 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
218 up_write(&pcmcia_socket_list_rwsem);
220 #ifndef CONFIG_CARDBUS
222 * If we do not support Cardbus, ensure that
223 * the Cardbus socket capability is disabled.
225 socket->features &= ~SS_CAP_CARDBUS;
228 /* set proper values in socket->dev */
229 dev_set_drvdata(&socket->dev, socket);
230 socket->dev.class = &pcmcia_socket_class;
231 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
233 /* base address = 0, map = 0 */
234 socket->cis_mem.flags = 0;
235 socket->cis_mem.speed = cis_speed;
237 INIT_LIST_HEAD(&socket->cis_cache);
239 init_completion(&socket->socket_released);
240 init_completion(&socket->thread_done);
241 mutex_init(&socket->skt_mutex);
242 spin_lock_init(&socket->thread_lock);
244 if (socket->resource_ops->init) {
245 ret = socket->resource_ops->init(socket);
250 tsk = kthread_run(pccardd, socket, "pccardd");
256 wait_for_completion(&socket->thread_done);
257 if (!socket->thread) {
258 dev_printk(KERN_WARNING, &socket->dev,
259 "PCMCIA: warning: socket thread did not start\n");
263 pcmcia_parse_events(socket, SS_DETECT);
268 down_write(&pcmcia_socket_list_rwsem);
269 list_del(&socket->socket_list);
270 up_write(&pcmcia_socket_list_rwsem);
272 } /* pcmcia_register_socket */
273 EXPORT_SYMBOL(pcmcia_register_socket);
277 * pcmcia_unregister_socket - remove a pcmcia socket device
278 * @socket: the &socket to unregister
280 void pcmcia_unregister_socket(struct pcmcia_socket *socket)
285 cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
288 kthread_stop(socket->thread);
290 release_cis_mem(socket);
292 /* remove from our own list */
293 down_write(&pcmcia_socket_list_rwsem);
294 list_del(&socket->socket_list);
295 up_write(&pcmcia_socket_list_rwsem);
297 /* wait for sysfs to drop all references */
298 release_resource_db(socket);
299 wait_for_completion(&socket->socket_released);
300 } /* pcmcia_unregister_socket */
301 EXPORT_SYMBOL(pcmcia_unregister_socket);
304 struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
306 struct pcmcia_socket *s;
308 down_read(&pcmcia_socket_list_rwsem);
309 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
311 up_read(&pcmcia_socket_list_rwsem);
314 up_read(&pcmcia_socket_list_rwsem);
319 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
322 * The central event handler. Send_event() sends an event to the
323 * 16-bit subsystem, which then calls the relevant device drivers.
324 * Parse_events() interprets the event bits from
325 * a card status change report. Do_shutdown() handles the high
326 * priority stuff associated with a card removal.
329 /* NOTE: send_event needs to be called with skt->sem held. */
331 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
335 if (s->state & SOCKET_CARDBUS)
338 cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
339 event, priority, s->callback);
343 if (!try_module_get(s->callback->owner))
346 ret = s->callback->event(s, event, priority);
348 module_put(s->callback->owner);
353 static void socket_remove_drivers(struct pcmcia_socket *skt)
355 cs_dbg(skt, 4, "remove_drivers\n");
357 send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
360 static int socket_reset(struct pcmcia_socket *skt)
364 cs_dbg(skt, 4, "reset\n");
366 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
367 skt->ops->set_socket(skt, &skt->socket);
368 udelay((long)reset_time);
370 skt->socket.flags &= ~SS_RESET;
371 skt->ops->set_socket(skt, &skt->socket);
373 msleep(unreset_delay * 10);
374 for (i = 0; i < unreset_limit; i++) {
375 skt->ops->get_status(skt, &status);
377 if (!(status & SS_DETECT))
380 if (status & SS_READY)
383 msleep(unreset_check * 10);
386 cs_err(skt, "time out after reset.\n");
391 * socket_setup() and socket_shutdown() are called by the main event handler
392 * when card insertion and removal events are received.
393 * socket_setup() turns on socket power and resets the socket, in two stages.
394 * socket_shutdown() unconfigures a socket and turns off socket power.
396 static void socket_shutdown(struct pcmcia_socket *s)
400 cs_dbg(s, 4, "shutdown\n");
402 socket_remove_drivers(s);
403 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
404 msleep(shutdown_delay * 10);
405 s->state &= SOCKET_INUSE;
407 /* Blank out the socket state */
408 s->socket = dead_socket;
410 s->ops->set_socket(s, &s->socket);
411 s->irq.AssignedIRQ = s->irq.Config = 0;
413 destroy_cis_cache(s);
414 #ifdef CONFIG_CARDBUS
419 /* give socket some time to power down */
422 s->ops->get_status(s, &status);
423 if (status & SS_POWERON) {
424 dev_printk(KERN_ERR, &s->dev,
425 "*** DANGER *** unable to remove socket power\n");
431 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
435 cs_dbg(skt, 4, "setup\n");
437 skt->ops->get_status(skt, &status);
438 if (!(status & SS_DETECT))
441 msleep(initial_delay * 10);
443 for (i = 0; i < 100; i++) {
444 skt->ops->get_status(skt, &status);
445 if (!(status & SS_DETECT))
448 if (!(status & SS_PENDING))
454 if (status & SS_PENDING) {
455 cs_err(skt, "voltage interrogation timed out.\n");
459 if (status & SS_CARDBUS) {
460 if (!(skt->features & SS_CAP_CARDBUS)) {
461 cs_err(skt, "cardbus cards are not supported.\n");
464 skt->state |= SOCKET_CARDBUS;
468 * Decode the card voltage requirements, and apply power to the card.
470 if (status & SS_3VCARD)
471 skt->socket.Vcc = skt->socket.Vpp = 33;
472 else if (!(status & SS_XVCARD))
473 skt->socket.Vcc = skt->socket.Vpp = 50;
475 cs_err(skt, "unsupported voltage key.\n");
480 skt->power_hook(skt, HOOK_POWER_PRE);
482 skt->socket.flags = 0;
483 skt->ops->set_socket(skt, &skt->socket);
486 * Wait "vcc_settle" for the supply to stabilise.
488 msleep(vcc_settle * 10);
490 skt->ops->get_status(skt, &status);
491 if (!(status & SS_POWERON)) {
492 cs_err(skt, "unable to apply power.\n");
496 status = socket_reset(skt);
499 skt->power_hook(skt, HOOK_POWER_POST);
505 * Handle card insertion. Setup the socket, reset the card,
506 * and then tell the rest of PCMCIA that a card is present.
508 static int socket_insert(struct pcmcia_socket *skt)
512 cs_dbg(skt, 4, "insert\n");
514 if (!cs_socket_get(skt))
517 ret = socket_setup(skt, setup_delay);
519 skt->state |= SOCKET_PRESENT;
521 dev_printk(KERN_NOTICE, &skt->dev,
522 "pccard: %s card inserted into slot %d\n",
523 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
526 #ifdef CONFIG_CARDBUS
527 if (skt->state & SOCKET_CARDBUS) {
529 skt->state |= SOCKET_CARDBUS_CONFIG;
532 cs_dbg(skt, 4, "insert done\n");
534 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
536 socket_shutdown(skt);
542 static int socket_suspend(struct pcmcia_socket *skt)
544 if (skt->state & SOCKET_SUSPEND)
547 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
548 skt->socket = dead_socket;
549 skt->ops->set_socket(skt, &skt->socket);
550 if (skt->ops->suspend)
551 skt->ops->suspend(skt);
552 skt->state |= SOCKET_SUSPEND;
557 static int socket_early_resume(struct pcmcia_socket *skt)
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);
567 static int socket_late_resume(struct pcmcia_socket *skt)
569 if (!(skt->state & SOCKET_PRESENT)) {
570 skt->state &= ~SOCKET_SUSPEND;
571 return socket_insert(skt);
574 if (skt->resume_status == 0) {
576 * FIXME: need a better check here for cardbus cards.
578 if (verify_cis_cache(skt) != 0) {
579 cs_dbg(skt, 4, "cis mismatch - different card\n");
580 socket_remove_drivers(skt);
581 destroy_cis_cache(skt);
583 * Workaround: give DS time to schedule removal.
584 * Remove me once the 100ms delay is eliminated
588 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
590 cs_dbg(skt, 4, "cis matches cache\n");
591 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
594 socket_shutdown(skt);
597 skt->state &= ~SOCKET_SUSPEND;
603 * Resume a socket. If a card is present, verify its CIS against
604 * our cached copy. If they are different, the card has been
605 * replaced, and we need to tell the drivers.
607 static int socket_resume(struct pcmcia_socket *skt)
609 if (!(skt->state & SOCKET_SUSPEND))
612 socket_early_resume(skt);
613 return socket_late_resume(skt);
616 static void socket_remove(struct pcmcia_socket *skt)
618 dev_printk(KERN_NOTICE, &skt->dev,
619 "pccard: card ejected from slot %d\n", skt->sock);
620 socket_shutdown(skt);
624 * Process a socket card detect status change.
626 * If we don't have a card already present, delay the detect event for
627 * about 20ms (to be on the safe side) before reading the socket status.
629 * Some i82365-based systems send multiple SS_DETECT events during card
630 * insertion, and the "card present" status bit seems to bounce. This
631 * will probably be true with GPIO-based card detection systems after
632 * the product has aged.
634 static void socket_detect_change(struct pcmcia_socket *skt)
636 if (!(skt->state & SOCKET_SUSPEND)) {
639 if (!(skt->state & SOCKET_PRESENT))
642 skt->ops->get_status(skt, &status);
643 if ((skt->state & SOCKET_PRESENT) &&
644 !(status & SS_DETECT))
646 if (!(skt->state & SOCKET_PRESENT) &&
647 (status & SS_DETECT))
652 static int pccardd(void *__skt)
654 struct pcmcia_socket *skt = __skt;
657 skt->thread = current;
658 skt->socket = dead_socket;
660 skt->ops->set_socket(skt, &skt->socket);
662 /* register with the device core */
663 ret = device_register(&skt->dev);
665 dev_printk(KERN_WARNING, &skt->dev,
666 "PCMCIA: unable to register socket\n");
668 complete(&skt->thread_done);
671 ret = pccard_sysfs_add_socket(&skt->dev);
673 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
675 complete(&skt->thread_done);
682 set_current_state(TASK_INTERRUPTIBLE);
684 spin_lock_irqsave(&skt->thread_lock, flags);
685 events = skt->thread_events;
686 skt->thread_events = 0;
687 spin_unlock_irqrestore(&skt->thread_lock, flags);
690 mutex_lock(&skt->skt_mutex);
691 if (events & SS_DETECT)
692 socket_detect_change(skt);
693 if (events & SS_BATDEAD)
694 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
695 if (events & SS_BATWARN)
696 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
697 if (events & SS_READY)
698 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
699 mutex_unlock(&skt->skt_mutex);
703 if (kthread_should_stop())
709 /* make sure we are running before we exit */
710 set_current_state(TASK_RUNNING);
712 /* remove from the device core */
713 pccard_sysfs_remove_socket(&skt->dev);
714 device_unregister(&skt->dev);
720 * Yenta (at least) probes interrupts before registering the socket and
721 * starting the handler thread.
723 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
726 cs_dbg(s, 4, "parse_events: events %08x\n", events);
728 spin_lock_irqsave(&s->thread_lock, flags);
729 s->thread_events |= events;
730 spin_unlock_irqrestore(&s->thread_lock, flags);
732 wake_up_process(s->thread);
734 } /* pcmcia_parse_events */
735 EXPORT_SYMBOL(pcmcia_parse_events);
738 /* register pcmcia_callback */
739 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
743 /* s->skt_mutex also protects s->callback */
744 mutex_lock(&s->skt_mutex);
755 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
756 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
760 mutex_unlock(&s->skt_mutex);
764 EXPORT_SYMBOL(pccard_register_pcmcia);
767 /* I'm not sure which "reset" function this is supposed to use,
768 * but for now, it uses the low-level interface's reset, not the
772 int pcmcia_reset_card(struct pcmcia_socket *skt)
776 cs_dbg(skt, 1, "resetting socket\n");
778 mutex_lock(&skt->skt_mutex);
780 if (!(skt->state & SOCKET_PRESENT)) {
784 if (skt->state & SOCKET_SUSPEND) {
788 if (skt->state & SOCKET_CARDBUS) {
793 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
795 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
797 skt->callback->suspend(skt);
798 if (socket_reset(skt) == 0) {
799 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
801 skt->callback->resume(skt);
807 mutex_unlock(&skt->skt_mutex);
811 EXPORT_SYMBOL(pcmcia_reset_card);
814 /* These shut down or wake up a socket. They are sort of user
815 * initiated versions of the APM suspend and resume actions.
817 int pcmcia_suspend_card(struct pcmcia_socket *skt)
821 cs_dbg(skt, 1, "suspending socket\n");
823 mutex_lock(&skt->skt_mutex);
825 if (!(skt->state & SOCKET_PRESENT)) {
829 if (skt->state & SOCKET_CARDBUS) {
834 ret = skt->callback->suspend(skt);
838 ret = socket_suspend(skt);
840 mutex_unlock(&skt->skt_mutex);
844 EXPORT_SYMBOL(pcmcia_suspend_card);
847 int pcmcia_resume_card(struct pcmcia_socket *skt)
851 cs_dbg(skt, 1, "waking up socket\n");
853 mutex_lock(&skt->skt_mutex);
855 if (!(skt->state & SOCKET_PRESENT)) {
859 if (skt->state & SOCKET_CARDBUS) {
863 ret = socket_resume(skt);
864 if (!ret && skt->callback)
865 skt->callback->resume(skt);
867 mutex_unlock(&skt->skt_mutex);
871 EXPORT_SYMBOL(pcmcia_resume_card);
874 /* These handle user requests to eject or insert a card. */
875 int pcmcia_eject_card(struct pcmcia_socket *skt)
879 cs_dbg(skt, 1, "user eject request\n");
881 mutex_lock(&skt->skt_mutex);
883 if (!(skt->state & SOCKET_PRESENT)) {
888 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
897 mutex_unlock(&skt->skt_mutex);
901 EXPORT_SYMBOL(pcmcia_eject_card);
904 int pcmcia_insert_card(struct pcmcia_socket *skt)
908 cs_dbg(skt, 1, "user insert request\n");
910 mutex_lock(&skt->skt_mutex);
912 if (skt->state & SOCKET_PRESENT) {
916 if (socket_insert(skt) == -ENODEV) {
922 mutex_unlock(&skt->skt_mutex);
926 EXPORT_SYMBOL(pcmcia_insert_card);
929 static int pcmcia_socket_uevent(struct device *dev,
930 struct kobj_uevent_env *env)
932 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
934 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
941 static struct completion pcmcia_unload;
943 static void pcmcia_release_socket_class(struct class *data)
945 complete(&pcmcia_unload);
949 struct class pcmcia_socket_class = {
950 .name = "pcmcia_socket",
951 .dev_uevent = pcmcia_socket_uevent,
952 .dev_release = pcmcia_release_socket,
953 .class_release = pcmcia_release_socket_class,
955 EXPORT_SYMBOL(pcmcia_socket_class);
958 static int __init init_pcmcia_cs(void)
960 init_completion(&pcmcia_unload);
961 return class_register(&pcmcia_socket_class);
964 static void __exit exit_pcmcia_cs(void)
966 class_unregister(&pcmcia_socket_class);
967 wait_for_completion(&pcmcia_unload);
970 subsys_initcall(init_pcmcia_cs);
971 module_exit(exit_pcmcia_cs);