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/pci.h>
30 #include <linux/device.h>
31 #include <linux/kthread.h>
32 #include <linux/freezer.h>
33 #include <asm/system.h>
36 #define IN_CARD_SERVICES
37 #include <pcmcia/cs_types.h>
38 #include <pcmcia/ss.h>
39 #include <pcmcia/cs.h>
40 #include <pcmcia/bulkmem.h>
41 #include <pcmcia/cistpl.h>
42 #include <pcmcia/cisreg.h>
43 #include <pcmcia/ds.h>
44 #include "cs_internal.h"
47 /* Module parameters */
49 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
50 MODULE_DESCRIPTION("Linux Kernel Card Services");
51 MODULE_LICENSE("GPL");
53 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
55 INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
56 INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
57 INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
58 INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
59 INT_MODULE_PARM(reset_time, 10); /* usecs */
60 INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
61 INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
62 INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
64 /* Access speed for attribute memory windows */
65 INT_MODULE_PARM(cis_speed, 300); /* ns */
70 module_param(pc_debug, int, 0644);
72 int cs_debug_level(int level)
74 return pc_debug > level;
79 socket_state_t dead_socket = {
80 .csc_mask = SS_DETECT,
82 EXPORT_SYMBOL(dead_socket);
85 /* List of all sockets, protected by a rwsem */
86 LIST_HEAD(pcmcia_socket_list);
87 EXPORT_SYMBOL(pcmcia_socket_list);
89 DECLARE_RWSEM(pcmcia_socket_list_rwsem);
90 EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
94 * Low-level PCMCIA socket drivers need to register with the PCCard
95 * core using pcmcia_register_socket.
97 * socket drivers are expected to use the following callbacks in their
99 * - pcmcia_socket_dev_suspend
100 * - pcmcia_socket_dev_resume
101 * These functions check for the appropriate struct pcmcia_soket arrays,
102 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
104 static int socket_resume(struct pcmcia_socket *skt);
105 static int socket_suspend(struct pcmcia_socket *skt);
107 int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state)
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.dev != dev)
115 mutex_lock(&socket->skt_mutex);
116 socket_suspend(socket);
117 mutex_unlock(&socket->skt_mutex);
119 up_read(&pcmcia_socket_list_rwsem);
123 EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
125 int pcmcia_socket_dev_resume(struct device *dev)
127 struct pcmcia_socket *socket;
129 down_read(&pcmcia_socket_list_rwsem);
130 list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
131 if (socket->dev.dev != dev)
133 mutex_lock(&socket->skt_mutex);
134 socket_resume(socket);
135 mutex_unlock(&socket->skt_mutex);
137 up_read(&pcmcia_socket_list_rwsem);
141 EXPORT_SYMBOL(pcmcia_socket_dev_resume);
144 struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
146 struct class_device *cl_dev = class_device_get(&skt->dev);
149 skt = class_get_devdata(cl_dev);
150 if (!try_module_get(skt->owner)) {
151 class_device_put(&skt->dev);
156 EXPORT_SYMBOL(pcmcia_get_socket);
159 void pcmcia_put_socket(struct pcmcia_socket *skt)
161 module_put(skt->owner);
162 class_device_put(&skt->dev);
164 EXPORT_SYMBOL(pcmcia_put_socket);
167 static void pcmcia_release_socket(struct class_device *class_dev)
169 struct pcmcia_socket *socket = class_get_devdata(class_dev);
171 complete(&socket->socket_released);
174 static int pccardd(void *__skt);
177 * pcmcia_register_socket - add a new pcmcia socket device
179 int pcmcia_register_socket(struct pcmcia_socket *socket)
181 struct task_struct *tsk;
184 if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops)
187 cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
189 spin_lock_init(&socket->lock);
191 if (socket->resource_ops->init) {
192 ret = socket->resource_ops->init(socket);
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 socket->dev.class_data = socket;
230 socket->dev.class = &pcmcia_socket_class;
231 snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock);
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 init_waitqueue_head(&socket->thread_wait);
242 mutex_init(&socket->skt_mutex);
243 spin_lock_init(&socket->thread_lock);
245 tsk = kthread_run(pccardd, socket, "pccardd");
251 wait_for_completion(&socket->thread_done);
252 if (!socket->thread) {
253 printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket);
257 pcmcia_parse_events(socket, SS_DETECT);
262 down_write(&pcmcia_socket_list_rwsem);
263 list_del(&socket->socket_list);
264 up_write(&pcmcia_socket_list_rwsem);
266 } /* pcmcia_register_socket */
267 EXPORT_SYMBOL(pcmcia_register_socket);
271 * pcmcia_unregister_socket - remove a pcmcia socket device
273 void pcmcia_unregister_socket(struct pcmcia_socket *socket)
278 cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
280 if (socket->thread) {
281 wake_up(&socket->thread_wait);
282 kthread_stop(socket->thread);
284 release_cis_mem(socket);
286 /* remove from our own list */
287 down_write(&pcmcia_socket_list_rwsem);
288 list_del(&socket->socket_list);
289 up_write(&pcmcia_socket_list_rwsem);
291 /* wait for sysfs to drop all references */
292 release_resource_db(socket);
293 wait_for_completion(&socket->socket_released);
294 } /* pcmcia_unregister_socket */
295 EXPORT_SYMBOL(pcmcia_unregister_socket);
298 struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
300 struct pcmcia_socket *s;
302 down_read(&pcmcia_socket_list_rwsem);
303 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
305 up_read(&pcmcia_socket_list_rwsem);
308 up_read(&pcmcia_socket_list_rwsem);
313 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
316 * The central event handler. Send_event() sends an event to the
317 * 16-bit subsystem, which then calls the relevant device drivers.
318 * Parse_events() interprets the event bits from
319 * a card status change report. Do_shutdown() handles the high
320 * priority stuff associated with a card removal.
323 /* NOTE: send_event needs to be called with skt->sem held. */
325 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
329 if (s->state & SOCKET_CARDBUS)
332 cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
333 event, priority, s->callback);
337 if (!try_module_get(s->callback->owner))
340 ret = s->callback->event(s, event, priority);
342 module_put(s->callback->owner);
347 static void socket_remove_drivers(struct pcmcia_socket *skt)
349 cs_dbg(skt, 4, "remove_drivers\n");
351 send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
354 static int socket_reset(struct pcmcia_socket *skt)
358 cs_dbg(skt, 4, "reset\n");
360 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
361 skt->ops->set_socket(skt, &skt->socket);
362 udelay((long)reset_time);
364 skt->socket.flags &= ~SS_RESET;
365 skt->ops->set_socket(skt, &skt->socket);
367 msleep(unreset_delay * 10);
368 for (i = 0; i < unreset_limit; i++) {
369 skt->ops->get_status(skt, &status);
371 if (!(status & SS_DETECT))
374 if (status & SS_READY)
377 msleep(unreset_check * 10);
380 cs_err(skt, "time out after reset.\n");
381 return CS_GENERAL_FAILURE;
385 * socket_setup() and socket_shutdown() are called by the main event handler
386 * when card insertion and removal events are received.
387 * socket_setup() turns on socket power and resets the socket, in two stages.
388 * socket_shutdown() unconfigures a socket and turns off socket power.
390 static void socket_shutdown(struct pcmcia_socket *s)
394 cs_dbg(s, 4, "shutdown\n");
396 socket_remove_drivers(s);
397 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
398 msleep(shutdown_delay * 10);
399 s->state &= SOCKET_INUSE;
401 /* Blank out the socket state */
402 s->socket = dead_socket;
404 s->ops->set_socket(s, &s->socket);
405 s->irq.AssignedIRQ = s->irq.Config = 0;
407 destroy_cis_cache(s);
408 #ifdef CONFIG_CARDBUS
413 s->ops->get_status(s, &status);
414 if (status & SS_POWERON) {
415 printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
421 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
425 cs_dbg(skt, 4, "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 cs_err(skt, "voltage interrogation timed out.\n");
446 return CS_GENERAL_FAILURE;
449 if (status & SS_CARDBUS) {
450 if (!(skt->features & SS_CAP_CARDBUS)) {
451 cs_err(skt, "cardbus cards are not supported.\n");
454 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 cs_err(skt, "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 cs_err(skt, "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 cs_dbg(skt, 4, "insert\n");
504 if (!cs_socket_get(skt))
507 ret = socket_setup(skt, setup_delay);
508 if (ret == CS_SUCCESS) {
509 skt->state |= SOCKET_PRESENT;
511 printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n",
512 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
515 #ifdef CONFIG_CARDBUS
516 if (skt->state & SOCKET_CARDBUS) {
518 skt->state |= SOCKET_CARDBUS_CONFIG;
521 cs_dbg(skt, 4, "insert done\n");
523 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
525 socket_shutdown(skt);
531 static int socket_suspend(struct pcmcia_socket *skt)
533 if (skt->state & SOCKET_SUSPEND)
536 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
537 skt->socket = dead_socket;
538 skt->ops->set_socket(skt, &skt->socket);
539 if (skt->ops->suspend)
540 skt->ops->suspend(skt);
541 skt->state |= SOCKET_SUSPEND;
547 * Resume a socket. If a card is present, verify its CIS against
548 * our cached copy. If they are different, the card has been
549 * replaced, and we need to tell the drivers.
551 static int socket_resume(struct pcmcia_socket *skt)
555 if (!(skt->state & SOCKET_SUSPEND))
558 skt->socket = dead_socket;
560 skt->ops->set_socket(skt, &skt->socket);
562 if (!(skt->state & SOCKET_PRESENT)) {
563 skt->state &= ~SOCKET_SUSPEND;
564 return socket_insert(skt);
567 ret = socket_setup(skt, resume_delay);
568 if (ret == CS_SUCCESS) {
570 * FIXME: need a better check here for cardbus cards.
572 if (verify_cis_cache(skt) != 0) {
573 cs_dbg(skt, 4, "cis mismatch - different card\n");
574 socket_remove_drivers(skt);
575 destroy_cis_cache(skt);
577 * Workaround: give DS time to schedule removal.
578 * Remove me once the 100ms delay is eliminated
582 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
584 cs_dbg(skt, 4, "cis matches cache\n");
585 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
588 socket_shutdown(skt);
591 skt->state &= ~SOCKET_SUSPEND;
596 static void socket_remove(struct pcmcia_socket *skt)
598 printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock);
599 socket_shutdown(skt);
603 * Process a socket card detect status change.
605 * If we don't have a card already present, delay the detect event for
606 * about 20ms (to be on the safe side) before reading the socket status.
608 * Some i82365-based systems send multiple SS_DETECT events during card
609 * insertion, and the "card present" status bit seems to bounce. This
610 * will probably be true with GPIO-based card detection systems after
611 * the product has aged.
613 static void socket_detect_change(struct pcmcia_socket *skt)
615 if (!(skt->state & SOCKET_SUSPEND)) {
618 if (!(skt->state & SOCKET_PRESENT))
621 skt->ops->get_status(skt, &status);
622 if ((skt->state & SOCKET_PRESENT) &&
623 !(status & SS_DETECT))
625 if (!(skt->state & SOCKET_PRESENT) &&
626 (status & SS_DETECT))
631 static int pccardd(void *__skt)
633 struct pcmcia_socket *skt = __skt;
634 DECLARE_WAITQUEUE(wait, current);
637 skt->thread = current;
638 skt->socket = dead_socket;
640 skt->ops->set_socket(skt, &skt->socket);
642 /* register with the device core */
643 ret = class_device_register(&skt->dev);
645 printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
648 complete(&skt->thread_done);
652 add_wait_queue(&skt->thread_wait, &wait);
653 complete(&skt->thread_done);
659 set_current_state(TASK_INTERRUPTIBLE);
661 spin_lock_irqsave(&skt->thread_lock, flags);
662 events = skt->thread_events;
663 skt->thread_events = 0;
664 spin_unlock_irqrestore(&skt->thread_lock, flags);
667 mutex_lock(&skt->skt_mutex);
668 if (events & SS_DETECT)
669 socket_detect_change(skt);
670 if (events & SS_BATDEAD)
671 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
672 if (events & SS_BATWARN)
673 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
674 if (events & SS_READY)
675 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
676 mutex_unlock(&skt->skt_mutex);
680 if (kthread_should_stop())
686 /* make sure we are running before we exit */
687 set_current_state(TASK_RUNNING);
689 remove_wait_queue(&skt->thread_wait, &wait);
691 /* remove from the device core */
692 class_device_unregister(&skt->dev);
698 * Yenta (at least) probes interrupts before registering the socket and
699 * starting the handler thread.
701 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
704 cs_dbg(s, 4, "parse_events: events %08x\n", events);
706 spin_lock_irqsave(&s->thread_lock, flags);
707 s->thread_events |= events;
708 spin_unlock_irqrestore(&s->thread_lock, flags);
710 wake_up(&s->thread_wait);
712 } /* pcmcia_parse_events */
713 EXPORT_SYMBOL(pcmcia_parse_events);
716 /* register pcmcia_callback */
717 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
721 /* s->skt_mutex also protects s->callback */
722 mutex_lock(&s->skt_mutex);
733 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
734 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
738 mutex_unlock(&s->skt_mutex);
742 EXPORT_SYMBOL(pccard_register_pcmcia);
745 /* I'm not sure which "reset" function this is supposed to use,
746 * but for now, it uses the low-level interface's reset, not the
750 int pccard_reset_card(struct pcmcia_socket *skt)
754 cs_dbg(skt, 1, "resetting socket\n");
756 mutex_lock(&skt->skt_mutex);
758 if (!(skt->state & SOCKET_PRESENT)) {
762 if (skt->state & SOCKET_SUSPEND) {
766 if (skt->state & SOCKET_CARDBUS) {
767 ret = CS_UNSUPPORTED_FUNCTION;
771 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
773 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
775 skt->callback->suspend(skt);
776 if (socket_reset(skt) == CS_SUCCESS) {
777 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
779 skt->callback->resume(skt);
785 mutex_unlock(&skt->skt_mutex);
789 EXPORT_SYMBOL(pccard_reset_card);
792 /* These shut down or wake up a socket. They are sort of user
793 * initiated versions of the APM suspend and resume actions.
795 int pcmcia_suspend_card(struct pcmcia_socket *skt)
799 cs_dbg(skt, 1, "suspending socket\n");
801 mutex_lock(&skt->skt_mutex);
803 if (!(skt->state & SOCKET_PRESENT)) {
807 if (skt->state & SOCKET_CARDBUS) {
808 ret = CS_UNSUPPORTED_FUNCTION;
812 ret = skt->callback->suspend(skt);
816 ret = socket_suspend(skt);
818 mutex_unlock(&skt->skt_mutex);
822 EXPORT_SYMBOL(pcmcia_suspend_card);
825 int pcmcia_resume_card(struct pcmcia_socket *skt)
829 cs_dbg(skt, 1, "waking up socket\n");
831 mutex_lock(&skt->skt_mutex);
833 if (!(skt->state & SOCKET_PRESENT)) {
837 if (skt->state & SOCKET_CARDBUS) {
838 ret = CS_UNSUPPORTED_FUNCTION;
841 ret = socket_resume(skt);
842 if (!ret && skt->callback)
843 skt->callback->resume(skt);
845 mutex_unlock(&skt->skt_mutex);
849 EXPORT_SYMBOL(pcmcia_resume_card);
852 /* These handle user requests to eject or insert a card. */
853 int pcmcia_eject_card(struct pcmcia_socket *skt)
857 cs_dbg(skt, 1, "user eject request\n");
859 mutex_lock(&skt->skt_mutex);
861 if (!(skt->state & SOCKET_PRESENT)) {
866 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
875 mutex_unlock(&skt->skt_mutex);
879 EXPORT_SYMBOL(pcmcia_eject_card);
882 int pcmcia_insert_card(struct pcmcia_socket *skt)
886 cs_dbg(skt, 1, "user insert request\n");
888 mutex_lock(&skt->skt_mutex);
890 if (skt->state & SOCKET_PRESENT) {
894 if (socket_insert(skt) == CS_NO_CARD) {
900 mutex_unlock(&skt->skt_mutex);
904 EXPORT_SYMBOL(pcmcia_insert_card);
907 static int pcmcia_socket_uevent(struct class_device *dev, char **envp,
908 int num_envp, char *buffer, int buffer_size)
910 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
911 int i = 0, length = 0;
913 if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
914 &length, "SOCKET_NO=%u", s->sock))
923 static struct completion pcmcia_unload;
925 static void pcmcia_release_socket_class(struct class *data)
927 complete(&pcmcia_unload);
931 struct class pcmcia_socket_class = {
932 .name = "pcmcia_socket",
933 .uevent = pcmcia_socket_uevent,
934 .release = pcmcia_release_socket,
935 .class_release = pcmcia_release_socket_class,
937 EXPORT_SYMBOL(pcmcia_socket_class);
940 static int __init init_pcmcia_cs(void)
944 init_completion(&pcmcia_unload);
945 ret = class_register(&pcmcia_socket_class);
948 return class_interface_register(&pccard_sysfs_interface);
951 static void __exit exit_pcmcia_cs(void)
953 class_interface_unregister(&pccard_sysfs_interface);
954 class_unregister(&pcmcia_socket_class);
956 wait_for_completion(&pcmcia_unload);
959 subsys_initcall(init_pcmcia_cs);
960 module_exit(exit_pcmcia_cs);