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/config.h>
20 #include <linux/string.h>
21 #include <linux/major.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
25 #include <linux/interrupt.h>
26 #include <linux/timer.h>
27 #include <linux/ioport.h>
28 #include <linux/delay.h>
30 #include <linux/pci.h>
31 #include <linux/device.h>
32 #include <asm/system.h>
35 #define IN_CARD_SERVICES
36 #include <pcmcia/version.h>
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 down(&socket
->skt_sem
);
116 socket_suspend(socket
);
117 up(&socket
->skt_sem
);
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 down(&socket
->skt_sem
);
134 socket_resume(socket
);
135 up(&socket
->skt_sem
);
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
)
183 if (!socket
|| !socket
->ops
|| !socket
->dev
.dev
|| !socket
->resource_ops
)
186 cs_dbg(socket
, 0, "pcmcia_register_socket(0x%p)\n", socket
->ops
);
188 spin_lock_init(&socket
->lock
);
190 if (socket
->resource_ops
->init
) {
191 ret
= socket
->resource_ops
->init(socket
);
196 /* try to obtain a socket number [yes, it gets ugly if we
197 * register more than 2^sizeof(unsigned int) pcmcia
198 * sockets... but the socket number is deprecated
199 * anyways, so I don't care] */
200 down_write(&pcmcia_socket_list_rwsem
);
201 if (list_empty(&pcmcia_socket_list
))
204 unsigned int found
, i
= 1;
205 struct pcmcia_socket
*tmp
;
208 list_for_each_entry(tmp
, &pcmcia_socket_list
, socket_list
) {
214 socket
->sock
= i
- 1;
216 list_add_tail(&socket
->socket_list
, &pcmcia_socket_list
);
217 up_write(&pcmcia_socket_list_rwsem
);
220 /* set proper values in socket->dev */
221 socket
->dev
.class_data
= socket
;
222 socket
->dev
.class = &pcmcia_socket_class
;
223 snprintf(socket
->dev
.class_id
, BUS_ID_SIZE
, "pcmcia_socket%u", socket
->sock
);
225 /* base address = 0, map = 0 */
226 socket
->cis_mem
.flags
= 0;
227 socket
->cis_mem
.speed
= cis_speed
;
229 INIT_LIST_HEAD(&socket
->cis_cache
);
231 init_completion(&socket
->socket_released
);
232 init_completion(&socket
->thread_done
);
233 init_waitqueue_head(&socket
->thread_wait
);
234 init_MUTEX(&socket
->skt_sem
);
235 spin_lock_init(&socket
->thread_lock
);
237 ret
= kernel_thread(pccardd
, socket
, CLONE_KERNEL
);
241 wait_for_completion(&socket
->thread_done
);
242 if(!socket
->thread
) {
243 printk(KERN_WARNING
"PCMCIA: warning: socket thread for socket %p did not start\n", socket
);
246 pcmcia_parse_events(socket
, SS_DETECT
);
251 down_write(&pcmcia_socket_list_rwsem
);
252 list_del(&socket
->socket_list
);
253 up_write(&pcmcia_socket_list_rwsem
);
255 } /* pcmcia_register_socket */
256 EXPORT_SYMBOL(pcmcia_register_socket
);
260 * pcmcia_unregister_socket - remove a pcmcia socket device
262 void pcmcia_unregister_socket(struct pcmcia_socket
*socket
)
267 cs_dbg(socket
, 0, "pcmcia_unregister_socket(0x%p)\n", socket
->ops
);
269 if (socket
->thread
) {
270 init_completion(&socket
->thread_done
);
271 socket
->thread
= NULL
;
272 wake_up(&socket
->thread_wait
);
273 wait_for_completion(&socket
->thread_done
);
275 release_cis_mem(socket
);
277 /* remove from our own list */
278 down_write(&pcmcia_socket_list_rwsem
);
279 list_del(&socket
->socket_list
);
280 up_write(&pcmcia_socket_list_rwsem
);
282 /* wait for sysfs to drop all references */
283 release_resource_db(socket
);
284 wait_for_completion(&socket
->socket_released
);
285 } /* pcmcia_unregister_socket */
286 EXPORT_SYMBOL(pcmcia_unregister_socket
);
289 struct pcmcia_socket
* pcmcia_get_socket_by_nr(unsigned int nr
)
291 struct pcmcia_socket
*s
;
293 down_read(&pcmcia_socket_list_rwsem
);
294 list_for_each_entry(s
, &pcmcia_socket_list
, socket_list
)
296 up_read(&pcmcia_socket_list_rwsem
);
299 up_read(&pcmcia_socket_list_rwsem
);
304 EXPORT_SYMBOL(pcmcia_get_socket_by_nr
);
308 * socket_setup() and shutdown_socket() are called by the main event
309 * handler when card insertion and removal events are received.
310 * socket_setup() turns on socket power and resets the socket, in two stages.
311 * shutdown_socket() unconfigures a socket and turns off socket power.
313 static void shutdown_socket(struct pcmcia_socket
*s
)
315 cs_dbg(s
, 1, "shutdown_socket\n");
317 /* Blank out the socket state */
318 s
->socket
= dead_socket
;
320 s
->ops
->set_socket(s
, &s
->socket
);
321 s
->irq
.AssignedIRQ
= s
->irq
.Config
= 0;
323 destroy_cis_cache(s
);
324 #ifdef CONFIG_CARDBUS
335 s
->ops
->get_status(s
, &status
);
336 if (status
& SS_POWERON
) {
337 printk(KERN_ERR
"PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s
);
340 } /* shutdown_socket */
344 * The central event handler. Send_event() sends an event to the
345 * 16-bit subsystem, which then calls the relevant device drivers.
346 * Parse_events() interprets the event bits from
347 * a card status change report. Do_shutdown() handles the high
348 * priority stuff associated with a card removal.
351 /* NOTE: send_event needs to be called with skt->sem held. */
353 static int send_event(struct pcmcia_socket
*s
, event_t event
, int priority
)
357 if (s
->state
& SOCKET_CARDBUS
)
360 cs_dbg(s
, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
361 event
, priority
, s
->callback
);
365 if (!try_module_get(s
->callback
->owner
))
368 ret
= s
->callback
->event(s
, event
, priority
);
370 module_put(s
->callback
->owner
);
375 static void socket_remove_drivers(struct pcmcia_socket
*skt
)
377 cs_dbg(skt
, 4, "remove_drivers\n");
379 send_event(skt
, CS_EVENT_CARD_REMOVAL
, CS_EVENT_PRI_HIGH
);
382 static void socket_shutdown(struct pcmcia_socket
*skt
)
384 cs_dbg(skt
, 4, "shutdown\n");
386 socket_remove_drivers(skt
);
387 skt
->state
&= SOCKET_INUSE
|SOCKET_PRESENT
;
388 msleep(shutdown_delay
* 10);
389 skt
->state
&= SOCKET_INUSE
;
390 shutdown_socket(skt
);
393 static int socket_reset(struct pcmcia_socket
*skt
)
397 cs_dbg(skt
, 4, "reset\n");
399 skt
->socket
.flags
|= SS_OUTPUT_ENA
| SS_RESET
;
400 skt
->ops
->set_socket(skt
, &skt
->socket
);
401 udelay((long)reset_time
);
403 skt
->socket
.flags
&= ~SS_RESET
;
404 skt
->ops
->set_socket(skt
, &skt
->socket
);
406 msleep(unreset_delay
* 10);
407 for (i
= 0; i
< unreset_limit
; i
++) {
408 skt
->ops
->get_status(skt
, &status
);
410 if (!(status
& SS_DETECT
))
413 if (status
& SS_READY
)
416 msleep(unreset_check
* 10);
419 cs_err(skt
, "time out after reset.\n");
420 return CS_GENERAL_FAILURE
;
423 static int socket_setup(struct pcmcia_socket
*skt
, int initial_delay
)
427 cs_dbg(skt
, 4, "setup\n");
429 skt
->ops
->get_status(skt
, &status
);
430 if (!(status
& SS_DETECT
))
433 msleep(initial_delay
* 10);
435 for (i
= 0; i
< 100; i
++) {
436 skt
->ops
->get_status(skt
, &status
);
437 if (!(status
& SS_DETECT
))
440 if (!(status
& SS_PENDING
))
446 if (status
& SS_PENDING
) {
447 cs_err(skt
, "voltage interrogation timed out.\n");
448 return CS_GENERAL_FAILURE
;
451 if (status
& SS_CARDBUS
) {
452 skt
->state
|= SOCKET_CARDBUS
;
453 #ifndef CONFIG_CARDBUS
454 cs_err(skt
, "cardbus cards are not supported.\n");
460 * Decode the card voltage requirements, and apply power to the card.
462 if (status
& SS_3VCARD
)
463 skt
->socket
.Vcc
= skt
->socket
.Vpp
= 33;
464 else if (!(status
& SS_XVCARD
))
465 skt
->socket
.Vcc
= skt
->socket
.Vpp
= 50;
467 cs_err(skt
, "unsupported voltage key.\n");
472 skt
->power_hook(skt
, HOOK_POWER_PRE
);
474 skt
->socket
.flags
= 0;
475 skt
->ops
->set_socket(skt
, &skt
->socket
);
478 * Wait "vcc_settle" for the supply to stabilise.
480 msleep(vcc_settle
* 10);
482 skt
->ops
->get_status(skt
, &status
);
483 if (!(status
& SS_POWERON
)) {
484 cs_err(skt
, "unable to apply power.\n");
488 status
= socket_reset(skt
);
491 skt
->power_hook(skt
, HOOK_POWER_POST
);
497 * Handle card insertion. Setup the socket, reset the card,
498 * and then tell the rest of PCMCIA that a card is present.
500 static int socket_insert(struct pcmcia_socket
*skt
)
504 cs_dbg(skt
, 4, "insert\n");
506 if (!cs_socket_get(skt
))
509 ret
= socket_setup(skt
, setup_delay
);
510 if (ret
== CS_SUCCESS
) {
511 skt
->state
|= SOCKET_PRESENT
;
512 #ifdef CONFIG_CARDBUS
513 if (skt
->state
& SOCKET_CARDBUS
) {
515 skt
->state
|= SOCKET_CARDBUS_CONFIG
;
518 cs_dbg(skt
, 4, "insert done\n");
520 send_event(skt
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
522 socket_shutdown(skt
);
529 static int socket_suspend(struct pcmcia_socket
*skt
)
531 if (skt
->state
& SOCKET_SUSPEND
)
534 send_event(skt
, CS_EVENT_PM_SUSPEND
, CS_EVENT_PRI_LOW
);
535 skt
->socket
= dead_socket
;
536 skt
->ops
->set_socket(skt
, &skt
->socket
);
537 if (skt
->ops
->suspend
)
538 skt
->ops
->suspend(skt
);
539 skt
->state
|= SOCKET_SUSPEND
;
545 * Resume a socket. If a card is present, verify its CIS against
546 * our cached copy. If they are different, the card has been
547 * replaced, and we need to tell the drivers.
549 static int socket_resume(struct pcmcia_socket
*skt
)
553 if (!(skt
->state
& SOCKET_SUSPEND
))
556 skt
->socket
= dead_socket
;
558 skt
->ops
->set_socket(skt
, &skt
->socket
);
560 if (!(skt
->state
& SOCKET_PRESENT
)) {
561 skt
->state
&= ~SOCKET_SUSPEND
;
562 return socket_insert(skt
);
565 ret
= socket_setup(skt
, resume_delay
);
566 if (ret
== CS_SUCCESS
) {
568 * FIXME: need a better check here for cardbus cards.
570 if (verify_cis_cache(skt
) != 0) {
571 cs_dbg(skt
, 4, "cis mismatch - different card\n");
572 socket_remove_drivers(skt
);
573 destroy_cis_cache(skt
);
575 * Workaround: give DS time to schedule removal.
576 * Remove me once the 100ms delay is eliminated
580 send_event(skt
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
582 cs_dbg(skt
, 4, "cis matches cache\n");
583 send_event(skt
, CS_EVENT_PM_RESUME
, CS_EVENT_PRI_LOW
);
586 socket_shutdown(skt
);
590 skt
->state
&= ~SOCKET_SUSPEND
;
595 static void socket_remove(struct pcmcia_socket
*skt
)
597 socket_shutdown(skt
);
602 * Process a socket card detect status change.
604 * If we don't have a card already present, delay the detect event for
605 * about 20ms (to be on the safe side) before reading the socket status.
607 * Some i82365-based systems send multiple SS_DETECT events during card
608 * insertion, and the "card present" status bit seems to bounce. This
609 * will probably be true with GPIO-based card detection systems after
610 * the product has aged.
612 static void socket_detect_change(struct pcmcia_socket
*skt
)
614 if (!(skt
->state
& SOCKET_SUSPEND
)) {
617 if (!(skt
->state
& SOCKET_PRESENT
))
620 skt
->ops
->get_status(skt
, &status
);
621 if ((skt
->state
& SOCKET_PRESENT
) &&
622 !(status
& SS_DETECT
))
624 if (!(skt
->state
& SOCKET_PRESENT
) &&
625 (status
& SS_DETECT
))
630 static int pccardd(void *__skt
)
632 struct pcmcia_socket
*skt
= __skt
;
633 DECLARE_WAITQUEUE(wait
, current
);
636 daemonize("pccardd");
638 skt
->thread
= current
;
639 skt
->socket
= dead_socket
;
641 skt
->ops
->set_socket(skt
, &skt
->socket
);
643 /* register with the device core */
644 ret
= class_device_register(&skt
->dev
);
646 printk(KERN_WARNING
"PCMCIA: unable to register socket 0x%p\n",
649 complete_and_exit(&skt
->thread_done
, 0);
651 complete(&skt
->thread_done
);
653 add_wait_queue(&skt
->thread_wait
, &wait
);
658 set_current_state(TASK_INTERRUPTIBLE
);
660 spin_lock_irqsave(&skt
->thread_lock
, flags
);
661 events
= skt
->thread_events
;
662 skt
->thread_events
= 0;
663 spin_unlock_irqrestore(&skt
->thread_lock
, flags
);
667 if (events
& SS_DETECT
)
668 socket_detect_change(skt
);
669 if (events
& SS_BATDEAD
)
670 send_event(skt
, CS_EVENT_BATTERY_DEAD
, CS_EVENT_PRI_LOW
);
671 if (events
& SS_BATWARN
)
672 send_event(skt
, CS_EVENT_BATTERY_LOW
, CS_EVENT_PRI_LOW
);
673 if (events
& SS_READY
)
674 send_event(skt
, CS_EVENT_READY_CHANGE
, CS_EVENT_PRI_LOW
);
685 remove_wait_queue(&skt
->thread_wait
, &wait
);
687 /* remove from the device core */
688 class_device_unregister(&skt
->dev
);
690 complete_and_exit(&skt
->thread_done
, 0);
694 * Yenta (at least) probes interrupts before registering the socket and
695 * starting the handler thread.
697 void pcmcia_parse_events(struct pcmcia_socket
*s
, u_int events
)
699 cs_dbg(s
, 4, "parse_events: events %08x\n", events
);
701 spin_lock(&s
->thread_lock
);
702 s
->thread_events
|= events
;
703 spin_unlock(&s
->thread_lock
);
705 wake_up(&s
->thread_wait
);
707 } /* pcmcia_parse_events */
708 EXPORT_SYMBOL(pcmcia_parse_events
);
711 /* register pcmcia_callback */
712 int pccard_register_pcmcia(struct pcmcia_socket
*s
, struct pcmcia_callback
*c
)
716 /* s->skt_sem also protects s->callback */
728 if ((s
->state
& (SOCKET_PRESENT
|SOCKET_CARDBUS
)) == SOCKET_PRESENT
)
729 send_event(s
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
737 EXPORT_SYMBOL(pccard_register_pcmcia
);
740 /* I'm not sure which "reset" function this is supposed to use,
741 * but for now, it uses the low-level interface's reset, not the
745 int pccard_reset_card(struct pcmcia_socket
*skt
)
749 cs_dbg(skt
, 1, "resetting socket\n");
753 if (!(skt
->state
& SOCKET_PRESENT
)) {
757 if (skt
->state
& SOCKET_SUSPEND
) {
761 if (skt
->state
& SOCKET_CARDBUS
) {
762 ret
= CS_UNSUPPORTED_FUNCTION
;
766 ret
= send_event(skt
, CS_EVENT_RESET_REQUEST
, CS_EVENT_PRI_LOW
);
768 send_event(skt
, CS_EVENT_RESET_PHYSICAL
, CS_EVENT_PRI_LOW
);
769 if (socket_reset(skt
) == CS_SUCCESS
)
770 send_event(skt
, CS_EVENT_CARD_RESET
, CS_EVENT_PRI_LOW
);
779 EXPORT_SYMBOL(pccard_reset_card
);
782 /* These shut down or wake up a socket. They are sort of user
783 * initiated versions of the APM suspend and resume actions.
785 int pcmcia_suspend_card(struct pcmcia_socket
*skt
)
789 cs_dbg(skt
, 1, "suspending socket\n");
793 if (!(skt
->state
& SOCKET_PRESENT
)) {
797 if (skt
->state
& SOCKET_CARDBUS
) {
798 ret
= CS_UNSUPPORTED_FUNCTION
;
801 ret
= socket_suspend(skt
);
807 EXPORT_SYMBOL(pcmcia_suspend_card
);
810 int pcmcia_resume_card(struct pcmcia_socket
*skt
)
814 cs_dbg(skt
, 1, "waking up socket\n");
818 if (!(skt
->state
& SOCKET_PRESENT
)) {
822 if (skt
->state
& SOCKET_CARDBUS
) {
823 ret
= CS_UNSUPPORTED_FUNCTION
;
826 ret
= socket_resume(skt
);
832 EXPORT_SYMBOL(pcmcia_resume_card
);
835 /* These handle user requests to eject or insert a card. */
836 int pcmcia_eject_card(struct pcmcia_socket
*skt
)
840 cs_dbg(skt
, 1, "user eject request\n");
844 if (!(skt
->state
& SOCKET_PRESENT
)) {
849 ret
= send_event(skt
, CS_EVENT_EJECTION_REQUEST
, CS_EVENT_PRI_LOW
);
862 EXPORT_SYMBOL(pcmcia_eject_card
);
865 int pcmcia_insert_card(struct pcmcia_socket
*skt
)
869 cs_dbg(skt
, 1, "user insert request\n");
873 if (skt
->state
& SOCKET_PRESENT
) {
877 if (socket_insert(skt
) == CS_NO_CARD
) {
887 EXPORT_SYMBOL(pcmcia_insert_card
);
890 static int pcmcia_socket_hotplug(struct class_device
*dev
, char **envp
,
891 int num_envp
, char *buffer
, int buffer_size
)
893 struct pcmcia_socket
*s
= container_of(dev
, struct pcmcia_socket
, dev
);
894 int i
= 0, length
= 0;
896 if (add_hotplug_env_var(envp
, num_envp
, &i
, buffer
, buffer_size
,
897 &length
, "SOCKET_NO=%u", s
->sock
))
906 static struct completion pcmcia_unload
;
908 static void pcmcia_release_socket_class(struct class *data
)
910 complete(&pcmcia_unload
);
914 struct class pcmcia_socket_class
= {
915 .name
= "pcmcia_socket",
916 .hotplug
= pcmcia_socket_hotplug
,
917 .release
= pcmcia_release_socket
,
918 .class_release
= pcmcia_release_socket_class
,
920 EXPORT_SYMBOL(pcmcia_socket_class
);
923 static int __init
init_pcmcia_cs(void)
927 init_completion(&pcmcia_unload
);
928 ret
= class_register(&pcmcia_socket_class
);
931 return class_interface_register(&pccard_sysfs_interface
);
934 static void __exit
exit_pcmcia_cs(void)
936 class_interface_unregister(&pccard_sysfs_interface
);
937 class_unregister(&pcmcia_socket_class
);
939 wait_for_completion(&pcmcia_unload
);
942 subsys_initcall(init_pcmcia_cs
);
943 module_exit(exit_pcmcia_cs
);