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/cs_types.h>
37 #include <pcmcia/ss.h>
38 #include <pcmcia/cs.h>
39 #include <pcmcia/bulkmem.h>
40 #include <pcmcia/cistpl.h>
41 #include <pcmcia/cisreg.h>
42 #include <pcmcia/ds.h>
43 #include "cs_internal.h"
46 /* Module parameters */
48 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
49 MODULE_DESCRIPTION("Linux Kernel Card Services");
50 MODULE_LICENSE("GPL");
52 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
54 INT_MODULE_PARM(setup_delay
, 10); /* centiseconds */
55 INT_MODULE_PARM(resume_delay
, 20); /* centiseconds */
56 INT_MODULE_PARM(shutdown_delay
, 3); /* centiseconds */
57 INT_MODULE_PARM(vcc_settle
, 40); /* centiseconds */
58 INT_MODULE_PARM(reset_time
, 10); /* usecs */
59 INT_MODULE_PARM(unreset_delay
, 10); /* centiseconds */
60 INT_MODULE_PARM(unreset_check
, 10); /* centiseconds */
61 INT_MODULE_PARM(unreset_limit
, 30); /* unreset_check's */
63 /* Access speed for attribute memory windows */
64 INT_MODULE_PARM(cis_speed
, 300); /* ns */
69 module_param(pc_debug
, int, 0644);
71 int cs_debug_level(int level
)
73 return pc_debug
> level
;
78 socket_state_t dead_socket
= {
79 .csc_mask
= SS_DETECT
,
81 EXPORT_SYMBOL(dead_socket
);
84 /* List of all sockets, protected by a rwsem */
85 LIST_HEAD(pcmcia_socket_list
);
86 EXPORT_SYMBOL(pcmcia_socket_list
);
88 DECLARE_RWSEM(pcmcia_socket_list_rwsem
);
89 EXPORT_SYMBOL(pcmcia_socket_list_rwsem
);
93 * Low-level PCMCIA socket drivers need to register with the PCCard
94 * core using pcmcia_register_socket.
96 * socket drivers are expected to use the following callbacks in their
98 * - pcmcia_socket_dev_suspend
99 * - pcmcia_socket_dev_resume
100 * These functions check for the appropriate struct pcmcia_soket arrays,
101 * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
103 static int socket_resume(struct pcmcia_socket
*skt
);
104 static int socket_suspend(struct pcmcia_socket
*skt
);
106 int pcmcia_socket_dev_suspend(struct device
*dev
, pm_message_t state
)
108 struct pcmcia_socket
*socket
;
110 down_read(&pcmcia_socket_list_rwsem
);
111 list_for_each_entry(socket
, &pcmcia_socket_list
, socket_list
) {
112 if (socket
->dev
.dev
!= dev
)
114 down(&socket
->skt_sem
);
115 socket_suspend(socket
);
116 up(&socket
->skt_sem
);
118 up_read(&pcmcia_socket_list_rwsem
);
122 EXPORT_SYMBOL(pcmcia_socket_dev_suspend
);
124 int pcmcia_socket_dev_resume(struct device
*dev
)
126 struct pcmcia_socket
*socket
;
128 down_read(&pcmcia_socket_list_rwsem
);
129 list_for_each_entry(socket
, &pcmcia_socket_list
, socket_list
) {
130 if (socket
->dev
.dev
!= dev
)
132 down(&socket
->skt_sem
);
133 socket_resume(socket
);
134 up(&socket
->skt_sem
);
136 up_read(&pcmcia_socket_list_rwsem
);
140 EXPORT_SYMBOL(pcmcia_socket_dev_resume
);
143 struct pcmcia_socket
* pcmcia_get_socket(struct pcmcia_socket
*skt
)
145 struct class_device
*cl_dev
= class_device_get(&skt
->dev
);
148 skt
= class_get_devdata(cl_dev
);
149 if (!try_module_get(skt
->owner
)) {
150 class_device_put(&skt
->dev
);
155 EXPORT_SYMBOL(pcmcia_get_socket
);
158 void pcmcia_put_socket(struct pcmcia_socket
*skt
)
160 module_put(skt
->owner
);
161 class_device_put(&skt
->dev
);
163 EXPORT_SYMBOL(pcmcia_put_socket
);
166 static void pcmcia_release_socket(struct class_device
*class_dev
)
168 struct pcmcia_socket
*socket
= class_get_devdata(class_dev
);
170 complete(&socket
->socket_released
);
173 static int pccardd(void *__skt
);
176 * pcmcia_register_socket - add a new pcmcia socket device
178 int pcmcia_register_socket(struct pcmcia_socket
*socket
)
182 if (!socket
|| !socket
->ops
|| !socket
->dev
.dev
|| !socket
->resource_ops
)
185 cs_dbg(socket
, 0, "pcmcia_register_socket(0x%p)\n", socket
->ops
);
187 spin_lock_init(&socket
->lock
);
189 if (socket
->resource_ops
->init
) {
190 ret
= socket
->resource_ops
->init(socket
);
195 /* try to obtain a socket number [yes, it gets ugly if we
196 * register more than 2^sizeof(unsigned int) pcmcia
197 * sockets... but the socket number is deprecated
198 * anyways, so I don't care] */
199 down_write(&pcmcia_socket_list_rwsem
);
200 if (list_empty(&pcmcia_socket_list
))
203 unsigned int found
, i
= 1;
204 struct pcmcia_socket
*tmp
;
207 list_for_each_entry(tmp
, &pcmcia_socket_list
, socket_list
) {
213 socket
->sock
= i
- 1;
215 list_add_tail(&socket
->socket_list
, &pcmcia_socket_list
);
216 up_write(&pcmcia_socket_list_rwsem
);
218 #ifndef CONFIG_CARDBUS
220 * If we do not support Cardbus, ensure that
221 * the Cardbus socket capability is disabled.
223 socket
->features
&= ~SS_CAP_CARDBUS
;
226 /* set proper values in socket->dev */
227 socket
->dev
.class_data
= socket
;
228 socket
->dev
.class = &pcmcia_socket_class
;
229 snprintf(socket
->dev
.class_id
, BUS_ID_SIZE
, "pcmcia_socket%u", socket
->sock
);
231 /* base address = 0, map = 0 */
232 socket
->cis_mem
.flags
= 0;
233 socket
->cis_mem
.speed
= cis_speed
;
235 INIT_LIST_HEAD(&socket
->cis_cache
);
237 init_completion(&socket
->socket_released
);
238 init_completion(&socket
->thread_done
);
239 init_waitqueue_head(&socket
->thread_wait
);
240 init_MUTEX(&socket
->skt_sem
);
241 spin_lock_init(&socket
->thread_lock
);
243 ret
= kernel_thread(pccardd
, socket
, CLONE_KERNEL
);
247 wait_for_completion(&socket
->thread_done
);
248 if(!socket
->thread
) {
249 printk(KERN_WARNING
"PCMCIA: warning: socket thread for socket %p did not start\n", socket
);
252 pcmcia_parse_events(socket
, SS_DETECT
);
257 down_write(&pcmcia_socket_list_rwsem
);
258 list_del(&socket
->socket_list
);
259 up_write(&pcmcia_socket_list_rwsem
);
261 } /* pcmcia_register_socket */
262 EXPORT_SYMBOL(pcmcia_register_socket
);
266 * pcmcia_unregister_socket - remove a pcmcia socket device
268 void pcmcia_unregister_socket(struct pcmcia_socket
*socket
)
273 cs_dbg(socket
, 0, "pcmcia_unregister_socket(0x%p)\n", socket
->ops
);
275 if (socket
->thread
) {
276 init_completion(&socket
->thread_done
);
277 socket
->thread
= NULL
;
278 wake_up(&socket
->thread_wait
);
279 wait_for_completion(&socket
->thread_done
);
281 release_cis_mem(socket
);
283 /* remove from our own list */
284 down_write(&pcmcia_socket_list_rwsem
);
285 list_del(&socket
->socket_list
);
286 up_write(&pcmcia_socket_list_rwsem
);
288 /* wait for sysfs to drop all references */
289 release_resource_db(socket
);
290 wait_for_completion(&socket
->socket_released
);
291 } /* pcmcia_unregister_socket */
292 EXPORT_SYMBOL(pcmcia_unregister_socket
);
295 struct pcmcia_socket
* pcmcia_get_socket_by_nr(unsigned int nr
)
297 struct pcmcia_socket
*s
;
299 down_read(&pcmcia_socket_list_rwsem
);
300 list_for_each_entry(s
, &pcmcia_socket_list
, socket_list
)
302 up_read(&pcmcia_socket_list_rwsem
);
305 up_read(&pcmcia_socket_list_rwsem
);
310 EXPORT_SYMBOL(pcmcia_get_socket_by_nr
);
314 * socket_setup() and shutdown_socket() are called by the main event
315 * handler when card insertion and removal events are received.
316 * socket_setup() turns on socket power and resets the socket, in two stages.
317 * shutdown_socket() unconfigures a socket and turns off socket power.
319 static void shutdown_socket(struct pcmcia_socket
*s
)
321 cs_dbg(s
, 1, "shutdown_socket\n");
323 /* Blank out the socket state */
324 s
->socket
= dead_socket
;
326 s
->ops
->set_socket(s
, &s
->socket
);
327 s
->irq
.AssignedIRQ
= s
->irq
.Config
= 0;
329 destroy_cis_cache(s
);
330 #ifdef CONFIG_CARDBUS
339 s
->ops
->get_status(s
, &status
);
340 if (status
& SS_POWERON
) {
341 printk(KERN_ERR
"PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s
);
344 } /* shutdown_socket */
348 * The central event handler. Send_event() sends an event to the
349 * 16-bit subsystem, which then calls the relevant device drivers.
350 * Parse_events() interprets the event bits from
351 * a card status change report. Do_shutdown() handles the high
352 * priority stuff associated with a card removal.
355 /* NOTE: send_event needs to be called with skt->sem held. */
357 static int send_event(struct pcmcia_socket
*s
, event_t event
, int priority
)
361 if (s
->state
& SOCKET_CARDBUS
)
364 cs_dbg(s
, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
365 event
, priority
, s
->callback
);
369 if (!try_module_get(s
->callback
->owner
))
372 ret
= s
->callback
->event(s
, event
, priority
);
374 module_put(s
->callback
->owner
);
379 static void socket_remove_drivers(struct pcmcia_socket
*skt
)
381 cs_dbg(skt
, 4, "remove_drivers\n");
383 send_event(skt
, CS_EVENT_CARD_REMOVAL
, CS_EVENT_PRI_HIGH
);
386 static void socket_shutdown(struct pcmcia_socket
*skt
)
388 cs_dbg(skt
, 4, "shutdown\n");
390 socket_remove_drivers(skt
);
391 skt
->state
&= SOCKET_INUSE
|SOCKET_PRESENT
;
392 msleep(shutdown_delay
* 10);
393 skt
->state
&= SOCKET_INUSE
;
394 shutdown_socket(skt
);
397 static int socket_reset(struct pcmcia_socket
*skt
)
401 cs_dbg(skt
, 4, "reset\n");
403 skt
->socket
.flags
|= SS_OUTPUT_ENA
| SS_RESET
;
404 skt
->ops
->set_socket(skt
, &skt
->socket
);
405 udelay((long)reset_time
);
407 skt
->socket
.flags
&= ~SS_RESET
;
408 skt
->ops
->set_socket(skt
, &skt
->socket
);
410 msleep(unreset_delay
* 10);
411 for (i
= 0; i
< unreset_limit
; i
++) {
412 skt
->ops
->get_status(skt
, &status
);
414 if (!(status
& SS_DETECT
))
417 if (status
& SS_READY
)
420 msleep(unreset_check
* 10);
423 cs_err(skt
, "time out after reset.\n");
424 return CS_GENERAL_FAILURE
;
427 static int socket_setup(struct pcmcia_socket
*skt
, int initial_delay
)
431 cs_dbg(skt
, 4, "setup\n");
433 skt
->ops
->get_status(skt
, &status
);
434 if (!(status
& SS_DETECT
))
437 msleep(initial_delay
* 10);
439 for (i
= 0; i
< 100; i
++) {
440 skt
->ops
->get_status(skt
, &status
);
441 if (!(status
& SS_DETECT
))
444 if (!(status
& SS_PENDING
))
450 if (status
& SS_PENDING
) {
451 cs_err(skt
, "voltage interrogation timed out.\n");
452 return CS_GENERAL_FAILURE
;
455 if (status
& SS_CARDBUS
) {
456 if (!(skt
->features
& SS_CAP_CARDBUS
)) {
457 cs_err(skt
, "cardbus cards are not supported.\n");
460 skt
->state
|= SOCKET_CARDBUS
;
464 * Decode the card voltage requirements, and apply power to the card.
466 if (status
& SS_3VCARD
)
467 skt
->socket
.Vcc
= skt
->socket
.Vpp
= 33;
468 else if (!(status
& SS_XVCARD
))
469 skt
->socket
.Vcc
= skt
->socket
.Vpp
= 50;
471 cs_err(skt
, "unsupported voltage key.\n");
476 skt
->power_hook(skt
, HOOK_POWER_PRE
);
478 skt
->socket
.flags
= 0;
479 skt
->ops
->set_socket(skt
, &skt
->socket
);
482 * Wait "vcc_settle" for the supply to stabilise.
484 msleep(vcc_settle
* 10);
486 skt
->ops
->get_status(skt
, &status
);
487 if (!(status
& SS_POWERON
)) {
488 cs_err(skt
, "unable to apply power.\n");
492 status
= socket_reset(skt
);
495 skt
->power_hook(skt
, HOOK_POWER_POST
);
501 * Handle card insertion. Setup the socket, reset the card,
502 * and then tell the rest of PCMCIA that a card is present.
504 static int socket_insert(struct pcmcia_socket
*skt
)
508 cs_dbg(skt
, 4, "insert\n");
510 if (!cs_socket_get(skt
))
513 ret
= socket_setup(skt
, setup_delay
);
514 if (ret
== CS_SUCCESS
) {
515 skt
->state
|= SOCKET_PRESENT
;
517 printk(KERN_NOTICE
"pccard: %s card inserted into slot %d\n",
518 (skt
->state
& SOCKET_CARDBUS
) ? "CardBus" : "PCMCIA",
521 #ifdef CONFIG_CARDBUS
522 if (skt
->state
& SOCKET_CARDBUS
) {
524 skt
->state
|= SOCKET_CARDBUS_CONFIG
;
527 cs_dbg(skt
, 4, "insert done\n");
529 send_event(skt
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
531 socket_shutdown(skt
);
538 static int socket_suspend(struct pcmcia_socket
*skt
)
540 if (skt
->state
& SOCKET_SUSPEND
)
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
;
554 * Resume a socket. If a card is present, verify its CIS against
555 * our cached copy. If they are different, the card has been
556 * replaced, and we need to tell the drivers.
558 static int socket_resume(struct pcmcia_socket
*skt
)
562 if (!(skt
->state
& SOCKET_SUSPEND
))
565 skt
->socket
= dead_socket
;
567 skt
->ops
->set_socket(skt
, &skt
->socket
);
569 if (!(skt
->state
& SOCKET_PRESENT
)) {
570 skt
->state
&= ~SOCKET_SUSPEND
;
571 return socket_insert(skt
);
574 ret
= socket_setup(skt
, resume_delay
);
575 if (ret
== CS_SUCCESS
) {
577 * FIXME: need a better check here for cardbus cards.
579 if (verify_cis_cache(skt
) != 0) {
580 cs_dbg(skt
, 4, "cis mismatch - different card\n");
581 socket_remove_drivers(skt
);
582 destroy_cis_cache(skt
);
584 * Workaround: give DS time to schedule removal.
585 * Remove me once the 100ms delay is eliminated
589 send_event(skt
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
591 cs_dbg(skt
, 4, "cis matches cache\n");
592 send_event(skt
, CS_EVENT_PM_RESUME
, CS_EVENT_PRI_LOW
);
595 socket_shutdown(skt
);
599 skt
->state
&= ~SOCKET_SUSPEND
;
604 static void socket_remove(struct pcmcia_socket
*skt
)
606 printk(KERN_NOTICE
"pccard: card ejected from slot %d\n", skt
->sock
);
607 socket_shutdown(skt
);
612 * Process a socket card detect status change.
614 * If we don't have a card already present, delay the detect event for
615 * about 20ms (to be on the safe side) before reading the socket status.
617 * Some i82365-based systems send multiple SS_DETECT events during card
618 * insertion, and the "card present" status bit seems to bounce. This
619 * will probably be true with GPIO-based card detection systems after
620 * the product has aged.
622 static void socket_detect_change(struct pcmcia_socket
*skt
)
624 if (!(skt
->state
& SOCKET_SUSPEND
)) {
627 if (!(skt
->state
& SOCKET_PRESENT
))
630 skt
->ops
->get_status(skt
, &status
);
631 if ((skt
->state
& SOCKET_PRESENT
) &&
632 !(status
& SS_DETECT
))
634 if (!(skt
->state
& SOCKET_PRESENT
) &&
635 (status
& SS_DETECT
))
640 static int pccardd(void *__skt
)
642 struct pcmcia_socket
*skt
= __skt
;
643 DECLARE_WAITQUEUE(wait
, current
);
646 daemonize("pccardd");
648 skt
->thread
= current
;
649 skt
->socket
= dead_socket
;
651 skt
->ops
->set_socket(skt
, &skt
->socket
);
653 /* register with the device core */
654 ret
= class_device_register(&skt
->dev
);
656 printk(KERN_WARNING
"PCMCIA: unable to register socket 0x%p\n",
659 complete_and_exit(&skt
->thread_done
, 0);
662 add_wait_queue(&skt
->thread_wait
, &wait
);
663 complete(&skt
->thread_done
);
669 set_current_state(TASK_INTERRUPTIBLE
);
671 spin_lock_irqsave(&skt
->thread_lock
, flags
);
672 events
= skt
->thread_events
;
673 skt
->thread_events
= 0;
674 spin_unlock_irqrestore(&skt
->thread_lock
, flags
);
678 if (events
& SS_DETECT
)
679 socket_detect_change(skt
);
680 if (events
& SS_BATDEAD
)
681 send_event(skt
, CS_EVENT_BATTERY_DEAD
, CS_EVENT_PRI_LOW
);
682 if (events
& SS_BATWARN
)
683 send_event(skt
, CS_EVENT_BATTERY_LOW
, CS_EVENT_PRI_LOW
);
684 if (events
& SS_READY
)
685 send_event(skt
, CS_EVENT_READY_CHANGE
, CS_EVENT_PRI_LOW
);
696 /* make sure we are running before we exit */
697 set_current_state(TASK_RUNNING
);
699 remove_wait_queue(&skt
->thread_wait
, &wait
);
701 /* remove from the device core */
702 class_device_unregister(&skt
->dev
);
704 complete_and_exit(&skt
->thread_done
, 0);
708 * Yenta (at least) probes interrupts before registering the socket and
709 * starting the handler thread.
711 void pcmcia_parse_events(struct pcmcia_socket
*s
, u_int events
)
713 cs_dbg(s
, 4, "parse_events: events %08x\n", events
);
715 spin_lock(&s
->thread_lock
);
716 s
->thread_events
|= events
;
717 spin_unlock(&s
->thread_lock
);
719 wake_up(&s
->thread_wait
);
721 } /* pcmcia_parse_events */
722 EXPORT_SYMBOL(pcmcia_parse_events
);
725 /* register pcmcia_callback */
726 int pccard_register_pcmcia(struct pcmcia_socket
*s
, struct pcmcia_callback
*c
)
730 /* s->skt_sem also protects s->callback */
742 if ((s
->state
& (SOCKET_PRESENT
|SOCKET_CARDBUS
)) == SOCKET_PRESENT
)
743 send_event(s
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
751 EXPORT_SYMBOL(pccard_register_pcmcia
);
754 /* I'm not sure which "reset" function this is supposed to use,
755 * but for now, it uses the low-level interface's reset, not the
759 int pccard_reset_card(struct pcmcia_socket
*skt
)
763 cs_dbg(skt
, 1, "resetting socket\n");
767 if (!(skt
->state
& SOCKET_PRESENT
)) {
771 if (skt
->state
& SOCKET_SUSPEND
) {
775 if (skt
->state
& SOCKET_CARDBUS
) {
776 ret
= CS_UNSUPPORTED_FUNCTION
;
780 ret
= send_event(skt
, CS_EVENT_RESET_REQUEST
, CS_EVENT_PRI_LOW
);
782 send_event(skt
, CS_EVENT_RESET_PHYSICAL
, CS_EVENT_PRI_LOW
);
783 if (socket_reset(skt
) == CS_SUCCESS
)
784 send_event(skt
, CS_EVENT_CARD_RESET
, CS_EVENT_PRI_LOW
);
793 EXPORT_SYMBOL(pccard_reset_card
);
796 /* These shut down or wake up a socket. They are sort of user
797 * initiated versions of the APM suspend and resume actions.
799 int pcmcia_suspend_card(struct pcmcia_socket
*skt
)
803 cs_dbg(skt
, 1, "suspending socket\n");
807 if (!(skt
->state
& SOCKET_PRESENT
)) {
811 if (skt
->state
& SOCKET_CARDBUS
) {
812 ret
= CS_UNSUPPORTED_FUNCTION
;
815 ret
= socket_suspend(skt
);
821 EXPORT_SYMBOL(pcmcia_suspend_card
);
824 int pcmcia_resume_card(struct pcmcia_socket
*skt
)
828 cs_dbg(skt
, 1, "waking up socket\n");
832 if (!(skt
->state
& SOCKET_PRESENT
)) {
836 if (skt
->state
& SOCKET_CARDBUS
) {
837 ret
= CS_UNSUPPORTED_FUNCTION
;
840 ret
= socket_resume(skt
);
846 EXPORT_SYMBOL(pcmcia_resume_card
);
849 /* These handle user requests to eject or insert a card. */
850 int pcmcia_eject_card(struct pcmcia_socket
*skt
)
854 cs_dbg(skt
, 1, "user eject request\n");
858 if (!(skt
->state
& SOCKET_PRESENT
)) {
863 ret
= send_event(skt
, CS_EVENT_EJECTION_REQUEST
, CS_EVENT_PRI_LOW
);
876 EXPORT_SYMBOL(pcmcia_eject_card
);
879 int pcmcia_insert_card(struct pcmcia_socket
*skt
)
883 cs_dbg(skt
, 1, "user insert request\n");
887 if (skt
->state
& SOCKET_PRESENT
) {
891 if (socket_insert(skt
) == CS_NO_CARD
) {
901 EXPORT_SYMBOL(pcmcia_insert_card
);
904 static int pcmcia_socket_hotplug(struct class_device
*dev
, char **envp
,
905 int num_envp
, char *buffer
, int buffer_size
)
907 struct pcmcia_socket
*s
= container_of(dev
, struct pcmcia_socket
, dev
);
908 int i
= 0, length
= 0;
910 if (add_hotplug_env_var(envp
, num_envp
, &i
, buffer
, buffer_size
,
911 &length
, "SOCKET_NO=%u", s
->sock
))
920 static struct completion pcmcia_unload
;
922 static void pcmcia_release_socket_class(struct class *data
)
924 complete(&pcmcia_unload
);
928 struct class pcmcia_socket_class
= {
929 .name
= "pcmcia_socket",
930 .hotplug
= pcmcia_socket_hotplug
,
931 .release
= pcmcia_release_socket
,
932 .class_release
= pcmcia_release_socket_class
,
934 EXPORT_SYMBOL(pcmcia_socket_class
);
937 static int __init
init_pcmcia_cs(void)
941 init_completion(&pcmcia_unload
);
942 ret
= class_register(&pcmcia_socket_class
);
945 return class_interface_register(&pccard_sysfs_interface
);
948 static void __exit
exit_pcmcia_cs(void)
950 class_interface_unregister(&pccard_sysfs_interface
);
951 class_unregister(&pcmcia_socket_class
);
953 wait_for_completion(&pcmcia_unload
);
956 subsys_initcall(init_pcmcia_cs
);
957 module_exit(exit_pcmcia_cs
);