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 skt
= dev_get_drvdata(dev
);
144 if (!try_module_get(skt
->owner
)) {
145 put_device(&skt
->dev
);
150 EXPORT_SYMBOL(pcmcia_get_socket
);
153 void pcmcia_put_socket(struct pcmcia_socket
*skt
)
155 module_put(skt
->owner
);
156 put_device(&skt
->dev
);
158 EXPORT_SYMBOL(pcmcia_put_socket
);
161 static void pcmcia_release_socket(struct device
*dev
)
163 struct pcmcia_socket
*socket
= dev_get_drvdata(dev
);
165 complete(&socket
->socket_released
);
168 static int pccardd(void *__skt
);
171 * pcmcia_register_socket - add a new pcmcia socket device
172 * @socket: the &socket to register
174 int pcmcia_register_socket(struct pcmcia_socket
*socket
)
176 struct task_struct
*tsk
;
179 if (!socket
|| !socket
->ops
|| !socket
->dev
.parent
|| !socket
->resource_ops
)
182 dev_dbg(&socket
->dev
, "pcmcia_register_socket(0x%p)\n", socket
->ops
);
184 spin_lock_init(&socket
->lock
);
186 /* try to obtain a socket number [yes, it gets ugly if we
187 * register more than 2^sizeof(unsigned int) pcmcia
188 * sockets... but the socket number is deprecated
189 * anyways, so I don't care] */
190 down_write(&pcmcia_socket_list_rwsem
);
191 if (list_empty(&pcmcia_socket_list
))
194 unsigned int found
, i
= 1;
195 struct pcmcia_socket
*tmp
;
198 list_for_each_entry(tmp
, &pcmcia_socket_list
, socket_list
) {
204 socket
->sock
= i
- 1;
206 list_add_tail(&socket
->socket_list
, &pcmcia_socket_list
);
207 up_write(&pcmcia_socket_list_rwsem
);
209 #ifndef CONFIG_CARDBUS
211 * If we do not support Cardbus, ensure that
212 * the Cardbus socket capability is disabled.
214 socket
->features
&= ~SS_CAP_CARDBUS
;
217 /* set proper values in socket->dev */
218 dev_set_drvdata(&socket
->dev
, socket
);
219 socket
->dev
.class = &pcmcia_socket_class
;
220 dev_set_name(&socket
->dev
, "pcmcia_socket%u", socket
->sock
);
222 /* base address = 0, map = 0 */
223 socket
->cis_mem
.flags
= 0;
224 socket
->cis_mem
.speed
= cis_speed
;
226 INIT_LIST_HEAD(&socket
->cis_cache
);
228 init_completion(&socket
->socket_released
);
229 init_completion(&socket
->thread_done
);
230 mutex_init(&socket
->skt_mutex
);
231 spin_lock_init(&socket
->thread_lock
);
233 if (socket
->resource_ops
->init
) {
234 ret
= socket
->resource_ops
->init(socket
);
239 tsk
= kthread_run(pccardd
, socket
, "pccardd");
245 wait_for_completion(&socket
->thread_done
);
246 if (!socket
->thread
) {
247 dev_printk(KERN_WARNING
, &socket
->dev
,
248 "PCMCIA: warning: socket thread did not start\n");
252 pcmcia_parse_events(socket
, SS_DETECT
);
255 * Let's try to get the PCMCIA module for 16-bit PCMCIA support.
256 * If it fails, it doesn't matter -- we still have 32-bit CardBus
257 * support to offer, so this is not a failure mode.
259 request_module_nowait("pcmcia");
264 down_write(&pcmcia_socket_list_rwsem
);
265 list_del(&socket
->socket_list
);
266 up_write(&pcmcia_socket_list_rwsem
);
268 } /* pcmcia_register_socket */
269 EXPORT_SYMBOL(pcmcia_register_socket
);
273 * pcmcia_unregister_socket - remove a pcmcia socket device
274 * @socket: the &socket to unregister
276 void pcmcia_unregister_socket(struct pcmcia_socket
*socket
)
281 dev_dbg(&socket
->dev
, "pcmcia_unregister_socket(0x%p)\n", socket
->ops
);
284 kthread_stop(socket
->thread
);
286 release_cis_mem(socket
);
288 /* remove from our own list */
289 down_write(&pcmcia_socket_list_rwsem
);
290 list_del(&socket
->socket_list
);
291 up_write(&pcmcia_socket_list_rwsem
);
293 /* wait for sysfs to drop all references */
294 release_resource_db(socket
);
295 wait_for_completion(&socket
->socket_released
);
296 } /* pcmcia_unregister_socket */
297 EXPORT_SYMBOL(pcmcia_unregister_socket
);
300 struct pcmcia_socket
*pcmcia_get_socket_by_nr(unsigned int nr
)
302 struct pcmcia_socket
*s
;
304 down_read(&pcmcia_socket_list_rwsem
);
305 list_for_each_entry(s
, &pcmcia_socket_list
, socket_list
)
307 up_read(&pcmcia_socket_list_rwsem
);
310 up_read(&pcmcia_socket_list_rwsem
);
315 EXPORT_SYMBOL(pcmcia_get_socket_by_nr
);
318 * The central event handler. Send_event() sends an event to the
319 * 16-bit subsystem, which then calls the relevant device drivers.
320 * Parse_events() interprets the event bits from
321 * a card status change report. Do_shutdown() handles the high
322 * priority stuff associated with a card removal.
325 /* NOTE: send_event needs to be called with skt->sem held. */
327 static int send_event(struct pcmcia_socket
*s
, event_t event
, int priority
)
331 if (s
->state
& SOCKET_CARDBUS
)
334 dev_dbg(&s
->dev
, "send_event(event %d, pri %d, callback 0x%p)\n",
335 event
, priority
, s
->callback
);
339 if (!try_module_get(s
->callback
->owner
))
342 ret
= s
->callback
->event(s
, event
, priority
);
344 module_put(s
->callback
->owner
);
349 static void socket_remove_drivers(struct pcmcia_socket
*skt
)
351 dev_dbg(&skt
->dev
, "remove_drivers\n");
353 send_event(skt
, CS_EVENT_CARD_REMOVAL
, CS_EVENT_PRI_HIGH
);
356 static int socket_reset(struct pcmcia_socket
*skt
)
360 dev_dbg(&skt
->dev
, "reset\n");
362 skt
->socket
.flags
|= SS_OUTPUT_ENA
| SS_RESET
;
363 skt
->ops
->set_socket(skt
, &skt
->socket
);
364 udelay((long)reset_time
);
366 skt
->socket
.flags
&= ~SS_RESET
;
367 skt
->ops
->set_socket(skt
, &skt
->socket
);
369 msleep(unreset_delay
* 10);
370 for (i
= 0; i
< unreset_limit
; i
++) {
371 skt
->ops
->get_status(skt
, &status
);
373 if (!(status
& SS_DETECT
))
376 if (status
& SS_READY
)
379 msleep(unreset_check
* 10);
382 dev_printk(KERN_ERR
, &skt
->dev
, "time out after reset.\n");
387 * socket_setup() and socket_shutdown() are called by the main event handler
388 * when card insertion and removal events are received.
389 * socket_setup() turns on socket power and resets the socket, in two stages.
390 * socket_shutdown() unconfigures a socket and turns off socket power.
392 static void socket_shutdown(struct pcmcia_socket
*s
)
396 dev_dbg(&s
->dev
, "shutdown\n");
398 socket_remove_drivers(s
);
399 s
->state
&= SOCKET_INUSE
| SOCKET_PRESENT
;
400 msleep(shutdown_delay
* 10);
401 s
->state
&= SOCKET_INUSE
;
403 /* Blank out the socket state */
404 s
->socket
= dead_socket
;
406 s
->ops
->set_socket(s
, &s
->socket
);
407 s
->irq
.AssignedIRQ
= s
->irq
.Config
= 0;
409 destroy_cis_cache(s
);
412 #ifdef CONFIG_CARDBUS
417 /* give socket some time to power down */
420 s
->ops
->get_status(s
, &status
);
421 if (status
& SS_POWERON
) {
422 dev_printk(KERN_ERR
, &s
->dev
,
423 "*** DANGER *** unable to remove socket power\n");
429 static int socket_setup(struct pcmcia_socket
*skt
, int initial_delay
)
433 dev_dbg(&skt
->dev
, "setup\n");
435 skt
->ops
->get_status(skt
, &status
);
436 if (!(status
& SS_DETECT
))
439 msleep(initial_delay
* 10);
441 for (i
= 0; i
< 100; i
++) {
442 skt
->ops
->get_status(skt
, &status
);
443 if (!(status
& SS_DETECT
))
446 if (!(status
& SS_PENDING
))
452 if (status
& SS_PENDING
) {
453 dev_printk(KERN_ERR
, &skt
->dev
,
454 "voltage interrogation timed out.\n");
458 if (status
& SS_CARDBUS
) {
459 if (!(skt
->features
& SS_CAP_CARDBUS
)) {
460 dev_printk(KERN_ERR
, &skt
->dev
,
461 "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 dev_printk(KERN_ERR
, &skt
->dev
, "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 dev_printk(KERN_ERR
, &skt
->dev
, "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 dev_dbg(&skt
->dev
, "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 dev_dbg(&skt
->dev
, "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 dev_dbg(&skt
->dev
, "cis mismatch - different card\n");
580 socket_remove_drivers(skt
);
581 destroy_cis_cache(skt
);
582 kfree(skt
->fake_cis
);
583 skt
->fake_cis
= NULL
;
585 * Workaround: give DS time to schedule removal.
586 * Remove me once the 100ms delay is eliminated
590 send_event(skt
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
592 dev_dbg(&skt
->dev
, "cis matches cache\n");
593 send_event(skt
, CS_EVENT_PM_RESUME
, CS_EVENT_PRI_LOW
);
596 socket_shutdown(skt
);
599 skt
->state
&= ~SOCKET_SUSPEND
;
605 * Resume a socket. If a card is present, verify its CIS against
606 * our cached copy. If they are different, the card has been
607 * replaced, and we need to tell the drivers.
609 static int socket_resume(struct pcmcia_socket
*skt
)
611 if (!(skt
->state
& SOCKET_SUSPEND
))
614 socket_early_resume(skt
);
615 return socket_late_resume(skt
);
618 static void socket_remove(struct pcmcia_socket
*skt
)
620 dev_printk(KERN_NOTICE
, &skt
->dev
,
621 "pccard: card ejected from slot %d\n", skt
->sock
);
622 socket_shutdown(skt
);
626 * Process a socket card detect status change.
628 * If we don't have a card already present, delay the detect event for
629 * about 20ms (to be on the safe side) before reading the socket status.
631 * Some i82365-based systems send multiple SS_DETECT events during card
632 * insertion, and the "card present" status bit seems to bounce. This
633 * will probably be true with GPIO-based card detection systems after
634 * the product has aged.
636 static void socket_detect_change(struct pcmcia_socket
*skt
)
638 if (!(skt
->state
& SOCKET_SUSPEND
)) {
641 if (!(skt
->state
& SOCKET_PRESENT
))
644 skt
->ops
->get_status(skt
, &status
);
645 if ((skt
->state
& SOCKET_PRESENT
) &&
646 !(status
& SS_DETECT
))
648 if (!(skt
->state
& SOCKET_PRESENT
) &&
649 (status
& SS_DETECT
))
654 static int pccardd(void *__skt
)
656 struct pcmcia_socket
*skt
= __skt
;
659 skt
->thread
= current
;
660 skt
->socket
= dead_socket
;
662 skt
->ops
->set_socket(skt
, &skt
->socket
);
664 /* register with the device core */
665 ret
= device_register(&skt
->dev
);
667 dev_printk(KERN_WARNING
, &skt
->dev
,
668 "PCMCIA: unable to register socket\n");
670 complete(&skt
->thread_done
);
673 ret
= pccard_sysfs_add_socket(&skt
->dev
);
675 dev_warn(&skt
->dev
, "err %d adding socket attributes\n", ret
);
677 complete(&skt
->thread_done
);
684 set_current_state(TASK_INTERRUPTIBLE
);
686 spin_lock_irqsave(&skt
->thread_lock
, flags
);
687 events
= skt
->thread_events
;
688 skt
->thread_events
= 0;
689 spin_unlock_irqrestore(&skt
->thread_lock
, flags
);
692 mutex_lock(&skt
->skt_mutex
);
693 if (events
& SS_DETECT
)
694 socket_detect_change(skt
);
695 if (events
& SS_BATDEAD
)
696 send_event(skt
, CS_EVENT_BATTERY_DEAD
, CS_EVENT_PRI_LOW
);
697 if (events
& SS_BATWARN
)
698 send_event(skt
, CS_EVENT_BATTERY_LOW
, CS_EVENT_PRI_LOW
);
699 if (events
& SS_READY
)
700 send_event(skt
, CS_EVENT_READY_CHANGE
, CS_EVENT_PRI_LOW
);
701 mutex_unlock(&skt
->skt_mutex
);
705 if (kthread_should_stop())
711 /* make sure we are running before we exit */
712 set_current_state(TASK_RUNNING
);
714 /* remove from the device core */
715 pccard_sysfs_remove_socket(&skt
->dev
);
716 device_unregister(&skt
->dev
);
722 * Yenta (at least) probes interrupts before registering the socket and
723 * starting the handler thread.
725 void pcmcia_parse_events(struct pcmcia_socket
*s
, u_int events
)
728 dev_dbg(&s
->dev
, "parse_events: events %08x\n", events
);
730 spin_lock_irqsave(&s
->thread_lock
, flags
);
731 s
->thread_events
|= events
;
732 spin_unlock_irqrestore(&s
->thread_lock
, flags
);
734 wake_up_process(s
->thread
);
736 } /* pcmcia_parse_events */
737 EXPORT_SYMBOL(pcmcia_parse_events
);
740 /* register pcmcia_callback */
741 int pccard_register_pcmcia(struct pcmcia_socket
*s
, struct pcmcia_callback
*c
)
745 /* s->skt_mutex also protects s->callback */
746 mutex_lock(&s
->skt_mutex
);
757 if ((s
->state
& (SOCKET_PRESENT
|SOCKET_CARDBUS
)) == SOCKET_PRESENT
)
758 send_event(s
, CS_EVENT_CARD_INSERTION
, CS_EVENT_PRI_LOW
);
762 mutex_unlock(&s
->skt_mutex
);
766 EXPORT_SYMBOL(pccard_register_pcmcia
);
769 /* I'm not sure which "reset" function this is supposed to use,
770 * but for now, it uses the low-level interface's reset, not the
774 int pcmcia_reset_card(struct pcmcia_socket
*skt
)
778 dev_dbg(&skt
->dev
, "resetting socket\n");
780 mutex_lock(&skt
->skt_mutex
);
782 if (!(skt
->state
& SOCKET_PRESENT
)) {
783 dev_dbg(&skt
->dev
, "can't reset, not present\n");
787 if (skt
->state
& SOCKET_SUSPEND
) {
788 dev_dbg(&skt
->dev
, "can't reset, suspended\n");
792 if (skt
->state
& SOCKET_CARDBUS
) {
793 dev_dbg(&skt
->dev
, "can't reset, is cardbus\n");
798 ret
= send_event(skt
, CS_EVENT_RESET_REQUEST
, CS_EVENT_PRI_LOW
);
800 send_event(skt
, CS_EVENT_RESET_PHYSICAL
, CS_EVENT_PRI_LOW
);
802 skt
->callback
->suspend(skt
);
803 if (socket_reset(skt
) == 0) {
804 send_event(skt
, CS_EVENT_CARD_RESET
, CS_EVENT_PRI_LOW
);
806 skt
->callback
->resume(skt
);
812 mutex_unlock(&skt
->skt_mutex
);
816 EXPORT_SYMBOL(pcmcia_reset_card
);
819 /* These shut down or wake up a socket. They are sort of user
820 * initiated versions of the APM suspend and resume actions.
822 int pcmcia_suspend_card(struct pcmcia_socket
*skt
)
826 dev_dbg(&skt
->dev
, "suspending socket\n");
828 mutex_lock(&skt
->skt_mutex
);
830 if (!(skt
->state
& SOCKET_PRESENT
)) {
834 if (skt
->state
& SOCKET_CARDBUS
) {
839 ret
= skt
->callback
->suspend(skt
);
843 ret
= socket_suspend(skt
);
845 mutex_unlock(&skt
->skt_mutex
);
849 EXPORT_SYMBOL(pcmcia_suspend_card
);
852 int pcmcia_resume_card(struct pcmcia_socket
*skt
)
856 dev_dbg(&skt
->dev
, "waking up socket\n");
858 mutex_lock(&skt
->skt_mutex
);
860 if (!(skt
->state
& SOCKET_PRESENT
)) {
864 if (skt
->state
& SOCKET_CARDBUS
) {
868 ret
= socket_resume(skt
);
869 if (!ret
&& skt
->callback
)
870 skt
->callback
->resume(skt
);
872 mutex_unlock(&skt
->skt_mutex
);
876 EXPORT_SYMBOL(pcmcia_resume_card
);
879 /* These handle user requests to eject or insert a card. */
880 int pcmcia_eject_card(struct pcmcia_socket
*skt
)
884 dev_dbg(&skt
->dev
, "user eject request\n");
886 mutex_lock(&skt
->skt_mutex
);
888 if (!(skt
->state
& SOCKET_PRESENT
)) {
893 ret
= send_event(skt
, CS_EVENT_EJECTION_REQUEST
, CS_EVENT_PRI_LOW
);
902 mutex_unlock(&skt
->skt_mutex
);
906 EXPORT_SYMBOL(pcmcia_eject_card
);
909 int pcmcia_insert_card(struct pcmcia_socket
*skt
)
913 dev_dbg(&skt
->dev
, "user insert request\n");
915 mutex_lock(&skt
->skt_mutex
);
917 if (skt
->state
& SOCKET_PRESENT
) {
921 if (socket_insert(skt
) == -ENODEV
) {
927 mutex_unlock(&skt
->skt_mutex
);
931 EXPORT_SYMBOL(pcmcia_insert_card
);
934 static int pcmcia_socket_uevent(struct device
*dev
,
935 struct kobj_uevent_env
*env
)
937 struct pcmcia_socket
*s
= container_of(dev
, struct pcmcia_socket
, dev
);
939 if (add_uevent_var(env
, "SOCKET_NO=%u", s
->sock
))
946 static struct completion pcmcia_unload
;
948 static void pcmcia_release_socket_class(struct class *data
)
950 complete(&pcmcia_unload
);
954 struct class pcmcia_socket_class
= {
955 .name
= "pcmcia_socket",
956 .dev_uevent
= pcmcia_socket_uevent
,
957 .dev_release
= pcmcia_release_socket
,
958 .class_release
= pcmcia_release_socket_class
,
960 EXPORT_SYMBOL(pcmcia_socket_class
);
963 static int __init
init_pcmcia_cs(void)
965 init_completion(&pcmcia_unload
);
966 return class_register(&pcmcia_socket_class
);
969 static void __exit
exit_pcmcia_cs(void)
971 class_unregister(&pcmcia_socket_class
);
972 wait_for_completion(&pcmcia_unload
);
975 subsys_initcall(init_pcmcia_cs
);
976 module_exit(exit_pcmcia_cs
);