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);
79 struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt)
81 struct device *dev = get_device(&skt->dev);
84 return dev_get_drvdata(dev);
86 EXPORT_SYMBOL(pcmcia_get_socket);
89 void pcmcia_put_socket(struct pcmcia_socket *skt)
91 put_device(&skt->dev);
93 EXPORT_SYMBOL(pcmcia_put_socket);
96 static void pcmcia_release_socket(struct device *dev)
98 struct pcmcia_socket *socket = dev_get_drvdata(dev);
100 complete(&socket->socket_released);
103 static int pccardd(void *__skt);
106 * pcmcia_register_socket - add a new pcmcia socket device
107 * @socket: the &socket to register
109 int pcmcia_register_socket(struct pcmcia_socket *socket)
111 struct task_struct *tsk;
114 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
117 dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops);
119 /* try to obtain a socket number [yes, it gets ugly if we
120 * register more than 2^sizeof(unsigned int) pcmcia
121 * sockets... but the socket number is deprecated
122 * anyways, so I don't care] */
123 down_write(&pcmcia_socket_list_rwsem);
124 if (list_empty(&pcmcia_socket_list))
127 unsigned int found, i = 1;
128 struct pcmcia_socket *tmp;
131 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
137 socket->sock = i - 1;
139 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
140 up_write(&pcmcia_socket_list_rwsem);
142 #ifndef CONFIG_CARDBUS
144 * If we do not support Cardbus, ensure that
145 * the Cardbus socket capability is disabled.
147 socket->features &= ~SS_CAP_CARDBUS;
150 /* set proper values in socket->dev */
151 dev_set_drvdata(&socket->dev, socket);
152 socket->dev.class = &pcmcia_socket_class;
153 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
155 /* base address = 0, map = 0 */
156 socket->cis_mem.flags = 0;
157 socket->cis_mem.speed = cis_speed;
159 INIT_LIST_HEAD(&socket->cis_cache);
161 init_completion(&socket->socket_released);
162 init_completion(&socket->thread_done);
163 mutex_init(&socket->skt_mutex);
164 mutex_init(&socket->ops_mutex);
165 spin_lock_init(&socket->thread_lock);
167 if (socket->resource_ops->init) {
168 mutex_lock(&socket->ops_mutex);
169 ret = socket->resource_ops->init(socket);
170 mutex_unlock(&socket->ops_mutex);
175 tsk = kthread_run(pccardd, socket, "pccardd");
181 wait_for_completion(&socket->thread_done);
182 if (!socket->thread) {
183 dev_printk(KERN_WARNING, &socket->dev,
184 "PCMCIA: warning: socket thread did not start\n");
188 pcmcia_parse_events(socket, SS_DETECT);
191 * Let's try to get the PCMCIA module for 16-bit PCMCIA support.
192 * If it fails, it doesn't matter -- we still have 32-bit CardBus
193 * support to offer, so this is not a failure mode.
195 request_module_nowait("pcmcia");
200 down_write(&pcmcia_socket_list_rwsem);
201 list_del(&socket->socket_list);
202 up_write(&pcmcia_socket_list_rwsem);
204 } /* pcmcia_register_socket */
205 EXPORT_SYMBOL(pcmcia_register_socket);
209 * pcmcia_unregister_socket - remove a pcmcia socket device
210 * @socket: the &socket to unregister
212 void pcmcia_unregister_socket(struct pcmcia_socket *socket)
217 dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
220 kthread_stop(socket->thread);
222 /* remove from our own list */
223 down_write(&pcmcia_socket_list_rwsem);
224 list_del(&socket->socket_list);
225 up_write(&pcmcia_socket_list_rwsem);
227 /* wait for sysfs to drop all references */
228 if (socket->resource_ops->exit) {
229 mutex_lock(&socket->ops_mutex);
230 socket->resource_ops->exit(socket);
231 mutex_unlock(&socket->ops_mutex);
233 wait_for_completion(&socket->socket_released);
234 } /* pcmcia_unregister_socket */
235 EXPORT_SYMBOL(pcmcia_unregister_socket);
238 struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
240 struct pcmcia_socket *s;
242 down_read(&pcmcia_socket_list_rwsem);
243 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
245 up_read(&pcmcia_socket_list_rwsem);
248 up_read(&pcmcia_socket_list_rwsem);
253 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
256 * The central event handler. Send_event() sends an event to the
257 * 16-bit subsystem, which then calls the relevant device drivers.
258 * Parse_events() interprets the event bits from
259 * a card status change report. Do_shutdown() handles the high
260 * priority stuff associated with a card removal.
263 /* NOTE: send_event needs to be called with skt->sem held. */
265 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
269 if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
272 dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n",
273 event, priority, s->callback);
277 if (!try_module_get(s->callback->owner))
280 ret = s->callback->event(s, event, priority);
282 module_put(s->callback->owner);
287 static int socket_reset(struct pcmcia_socket *skt)
291 dev_dbg(&skt->dev, "reset\n");
293 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
294 skt->ops->set_socket(skt, &skt->socket);
295 udelay((long)reset_time);
297 skt->socket.flags &= ~SS_RESET;
298 skt->ops->set_socket(skt, &skt->socket);
300 msleep(unreset_delay * 10);
301 for (i = 0; i < unreset_limit; i++) {
302 skt->ops->get_status(skt, &status);
304 if (!(status & SS_DETECT))
307 if (status & SS_READY)
310 msleep(unreset_check * 10);
313 dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n");
318 * socket_setup() and socket_shutdown() are called by the main event handler
319 * when card insertion and removal events are received.
320 * socket_setup() turns on socket power and resets the socket, in two stages.
321 * socket_shutdown() unconfigures a socket and turns off socket power.
323 static void socket_shutdown(struct pcmcia_socket *s)
327 dev_dbg(&s->dev, "shutdown\n");
329 send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
331 mutex_lock(&s->ops_mutex);
332 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
333 msleep(shutdown_delay * 10);
334 s->state &= SOCKET_INUSE;
336 /* Blank out the socket state */
337 s->socket = dead_socket;
339 s->ops->set_socket(s, &s->socket);
340 s->irq.AssignedIRQ = s->irq.Config = 0;
346 /* From here on we can be sure that only we (that is, the
347 * pccardd thread) accesses this socket, and all (16-bit)
348 * PCMCIA interactions are gone. Therefore, release
349 * ops_mutex so that we don't get a sysfs-related lockdep
352 mutex_unlock(&s->ops_mutex);
354 #ifdef CONFIG_CARDBUS
358 /* give socket some time to power down */
361 s->ops->get_status(s, &status);
362 if (status & SS_POWERON) {
363 dev_printk(KERN_ERR, &s->dev,
364 "*** DANGER *** unable to remove socket power\n");
367 s->state &= ~SOCKET_INUSE;
370 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
374 dev_dbg(&skt->dev, "setup\n");
376 skt->ops->get_status(skt, &status);
377 if (!(status & SS_DETECT))
380 msleep(initial_delay * 10);
382 for (i = 0; i < 100; i++) {
383 skt->ops->get_status(skt, &status);
384 if (!(status & SS_DETECT))
387 if (!(status & SS_PENDING))
393 if (status & SS_PENDING) {
394 dev_printk(KERN_ERR, &skt->dev,
395 "voltage interrogation timed out.\n");
399 if (status & SS_CARDBUS) {
400 if (!(skt->features & SS_CAP_CARDBUS)) {
401 dev_printk(KERN_ERR, &skt->dev,
402 "cardbus cards are not supported.\n");
405 skt->state |= SOCKET_CARDBUS;
407 skt->state &= ~SOCKET_CARDBUS;
410 * Decode the card voltage requirements, and apply power to the card.
412 if (status & SS_3VCARD)
413 skt->socket.Vcc = skt->socket.Vpp = 33;
414 else if (!(status & SS_XVCARD))
415 skt->socket.Vcc = skt->socket.Vpp = 50;
417 dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n");
422 skt->power_hook(skt, HOOK_POWER_PRE);
424 skt->socket.flags = 0;
425 skt->ops->set_socket(skt, &skt->socket);
428 * Wait "vcc_settle" for the supply to stabilise.
430 msleep(vcc_settle * 10);
432 skt->ops->get_status(skt, &status);
433 if (!(status & SS_POWERON)) {
434 dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n");
438 status = socket_reset(skt);
441 skt->power_hook(skt, HOOK_POWER_POST);
447 * Handle card insertion. Setup the socket, reset the card,
448 * and then tell the rest of PCMCIA that a card is present.
450 static int socket_insert(struct pcmcia_socket *skt)
454 dev_dbg(&skt->dev, "insert\n");
456 mutex_lock(&skt->ops_mutex);
457 if (skt->state & SOCKET_INUSE) {
458 mutex_unlock(&skt->ops_mutex);
461 skt->state |= SOCKET_INUSE;
463 ret = socket_setup(skt, setup_delay);
465 skt->state |= SOCKET_PRESENT;
467 dev_printk(KERN_NOTICE, &skt->dev,
468 "pccard: %s card inserted into slot %d\n",
469 (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
472 #ifdef CONFIG_CARDBUS
473 if (skt->state & SOCKET_CARDBUS) {
475 skt->state |= SOCKET_CARDBUS_CONFIG;
478 dev_dbg(&skt->dev, "insert done\n");
479 mutex_unlock(&skt->ops_mutex);
481 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
483 mutex_unlock(&skt->ops_mutex);
484 socket_shutdown(skt);
490 static int socket_suspend(struct pcmcia_socket *skt)
492 if (skt->state & SOCKET_SUSPEND)
495 mutex_lock(&skt->ops_mutex);
496 skt->suspended_state = skt->state;
498 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
499 skt->socket = dead_socket;
500 skt->ops->set_socket(skt, &skt->socket);
501 if (skt->ops->suspend)
502 skt->ops->suspend(skt);
503 skt->state |= SOCKET_SUSPEND;
504 mutex_unlock(&skt->ops_mutex);
508 static int socket_early_resume(struct pcmcia_socket *skt)
510 mutex_lock(&skt->ops_mutex);
511 skt->socket = dead_socket;
513 skt->ops->set_socket(skt, &skt->socket);
514 if (skt->state & SOCKET_PRESENT)
515 skt->resume_status = socket_setup(skt, resume_delay);
516 mutex_unlock(&skt->ops_mutex);
520 static int socket_late_resume(struct pcmcia_socket *skt)
524 mutex_lock(&skt->ops_mutex);
525 skt->state &= ~SOCKET_SUSPEND;
526 mutex_unlock(&skt->ops_mutex);
528 if (!(skt->state & SOCKET_PRESENT)) {
529 ret = socket_insert(skt);
535 if (skt->resume_status) {
536 socket_shutdown(skt);
540 if (skt->suspended_state != skt->state) {
542 "suspend state 0x%x != resume state 0x%x\n",
543 skt->suspended_state, skt->state);
545 socket_shutdown(skt);
546 return socket_insert(skt);
549 #ifdef CONFIG_CARDBUS
550 if (skt->state & SOCKET_CARDBUS) {
551 /* We can't be sure the CardBus card is the same
552 * as the one previously inserted. Therefore, remove
560 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
565 * Resume a socket. If a card is present, verify its CIS against
566 * our cached copy. If they are different, the card has been
567 * replaced, and we need to tell the drivers.
569 static int socket_resume(struct pcmcia_socket *skt)
571 if (!(skt->state & SOCKET_SUSPEND))
574 socket_early_resume(skt);
575 return socket_late_resume(skt);
578 static void socket_remove(struct pcmcia_socket *skt)
580 dev_printk(KERN_NOTICE, &skt->dev,
581 "pccard: card ejected from slot %d\n", skt->sock);
582 socket_shutdown(skt);
586 * Process a socket card detect status change.
588 * If we don't have a card already present, delay the detect event for
589 * about 20ms (to be on the safe side) before reading the socket status.
591 * Some i82365-based systems send multiple SS_DETECT events during card
592 * insertion, and the "card present" status bit seems to bounce. This
593 * will probably be true with GPIO-based card detection systems after
594 * the product has aged.
596 static void socket_detect_change(struct pcmcia_socket *skt)
598 if (!(skt->state & SOCKET_SUSPEND)) {
601 if (!(skt->state & SOCKET_PRESENT))
604 skt->ops->get_status(skt, &status);
605 if ((skt->state & SOCKET_PRESENT) &&
606 !(status & SS_DETECT))
608 if (!(skt->state & SOCKET_PRESENT) &&
609 (status & SS_DETECT))
614 static int pccardd(void *__skt)
616 struct pcmcia_socket *skt = __skt;
619 skt->thread = current;
620 skt->socket = dead_socket;
622 skt->ops->set_socket(skt, &skt->socket);
624 /* register with the device core */
625 ret = device_register(&skt->dev);
627 dev_printk(KERN_WARNING, &skt->dev,
628 "PCMCIA: unable to register socket\n");
630 complete(&skt->thread_done);
633 ret = pccard_sysfs_add_socket(&skt->dev);
635 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
637 complete(&skt->thread_done);
639 /* wait for userspace to catch up */
646 unsigned int sysfs_events;
648 set_current_state(TASK_INTERRUPTIBLE);
650 spin_lock_irqsave(&skt->thread_lock, flags);
651 events = skt->thread_events;
652 skt->thread_events = 0;
653 sysfs_events = skt->sysfs_events;
654 skt->sysfs_events = 0;
655 spin_unlock_irqrestore(&skt->thread_lock, flags);
657 mutex_lock(&skt->skt_mutex);
659 if (events & SS_DETECT)
660 socket_detect_change(skt);
661 if (events & SS_BATDEAD)
662 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
663 if (events & SS_BATWARN)
664 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
665 if (events & SS_READY)
666 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
670 if (sysfs_events & PCMCIA_UEVENT_EJECT)
672 if (sysfs_events & PCMCIA_UEVENT_INSERT)
674 if ((sysfs_events & PCMCIA_UEVENT_RESUME) &&
675 !(skt->state & SOCKET_CARDBUS)) {
676 ret = socket_resume(skt);
677 if (!ret && skt->callback)
678 skt->callback->resume(skt);
680 if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) &&
681 !(skt->state & SOCKET_CARDBUS)) {
683 ret = skt->callback->suspend(skt);
689 if ((sysfs_events & PCMCIA_UEVENT_REQUERY) &&
690 !(skt->state & SOCKET_CARDBUS)) {
691 if (!ret && skt->callback)
692 skt->callback->requery(skt);
695 mutex_unlock(&skt->skt_mutex);
697 if (events || sysfs_events)
700 if (kthread_should_stop())
706 /* make sure we are running before we exit */
707 set_current_state(TASK_RUNNING);
709 /* shut down socket, if a device is still present */
710 if (skt->state & SOCKET_PRESENT) {
711 mutex_lock(&skt->skt_mutex);
713 mutex_unlock(&skt->skt_mutex);
716 /* remove from the device core */
717 pccard_sysfs_remove_socket(&skt->dev);
718 device_unregister(&skt->dev);
724 * Yenta (at least) probes interrupts before registering the socket and
725 * starting the handler thread.
727 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
730 dev_dbg(&s->dev, "parse_events: events %08x\n", events);
732 spin_lock_irqsave(&s->thread_lock, flags);
733 s->thread_events |= events;
734 spin_unlock_irqrestore(&s->thread_lock, flags);
736 wake_up_process(s->thread);
738 } /* pcmcia_parse_events */
739 EXPORT_SYMBOL(pcmcia_parse_events);
742 * pcmcia_parse_uevents() - tell pccardd to issue manual commands
743 * @s: the PCMCIA socket we wan't to command
744 * @events: events to pass to pccardd
746 * userspace-issued insert, eject, suspend and resume commands must be
747 * handled by pccardd to avoid any sysfs-related deadlocks. Valid events
748 * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert),
749 * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend)
750 * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card).
752 void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events)
755 dev_dbg(&s->dev, "parse_uevents: events %08x\n", events);
757 spin_lock_irqsave(&s->thread_lock, flags);
758 s->sysfs_events |= events;
759 spin_unlock_irqrestore(&s->thread_lock, flags);
761 wake_up_process(s->thread);
764 EXPORT_SYMBOL(pcmcia_parse_uevents);
767 /* register pcmcia_callback */
768 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
772 /* s->skt_mutex also protects s->callback */
773 mutex_lock(&s->skt_mutex);
784 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
785 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
789 mutex_unlock(&s->skt_mutex);
793 EXPORT_SYMBOL(pccard_register_pcmcia);
796 /* I'm not sure which "reset" function this is supposed to use,
797 * but for now, it uses the low-level interface's reset, not the
801 int pcmcia_reset_card(struct pcmcia_socket *skt)
805 dev_dbg(&skt->dev, "resetting socket\n");
807 mutex_lock(&skt->skt_mutex);
809 if (!(skt->state & SOCKET_PRESENT)) {
810 dev_dbg(&skt->dev, "can't reset, not present\n");
814 if (skt->state & SOCKET_SUSPEND) {
815 dev_dbg(&skt->dev, "can't reset, suspended\n");
819 if (skt->state & SOCKET_CARDBUS) {
820 dev_dbg(&skt->dev, "can't reset, is cardbus\n");
825 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
827 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
829 skt->callback->suspend(skt);
830 mutex_lock(&skt->ops_mutex);
831 ret = socket_reset(skt);
832 mutex_unlock(&skt->ops_mutex);
834 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
836 skt->callback->resume(skt);
842 mutex_unlock(&skt->skt_mutex);
846 EXPORT_SYMBOL(pcmcia_reset_card);
849 static int pcmcia_socket_uevent(struct device *dev,
850 struct kobj_uevent_env *env)
852 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
854 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
861 static struct completion pcmcia_unload;
863 static void pcmcia_release_socket_class(struct class *data)
865 complete(&pcmcia_unload);
871 static int __pcmcia_pm_op(struct device *dev,
872 int (*callback) (struct pcmcia_socket *skt))
874 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
877 mutex_lock(&s->skt_mutex);
879 mutex_unlock(&s->skt_mutex);
884 static int pcmcia_socket_dev_suspend_noirq(struct device *dev)
886 return __pcmcia_pm_op(dev, socket_suspend);
889 static int pcmcia_socket_dev_resume_noirq(struct device *dev)
891 return __pcmcia_pm_op(dev, socket_early_resume);
894 static int pcmcia_socket_dev_resume(struct device *dev)
896 return __pcmcia_pm_op(dev, socket_late_resume);
899 static const struct dev_pm_ops pcmcia_socket_pm_ops = {
900 /* dev_resume may be called with IRQs enabled */
901 SET_SYSTEM_SLEEP_PM_OPS(NULL,
902 pcmcia_socket_dev_resume)
904 /* late suspend must be called with IRQs disabled */
905 .suspend_noirq = pcmcia_socket_dev_suspend_noirq,
906 .freeze_noirq = pcmcia_socket_dev_suspend_noirq,
907 .poweroff_noirq = pcmcia_socket_dev_suspend_noirq,
909 /* early resume must be called with IRQs disabled */
910 .resume_noirq = pcmcia_socket_dev_resume_noirq,
911 .thaw_noirq = pcmcia_socket_dev_resume_noirq,
912 .restore_noirq = pcmcia_socket_dev_resume_noirq,
915 #define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops)
917 #else /* CONFIG_PM */
919 #define PCMCIA_SOCKET_CLASS_PM_OPS NULL
921 #endif /* CONFIG_PM */
923 struct class pcmcia_socket_class = {
924 .name = "pcmcia_socket",
925 .dev_uevent = pcmcia_socket_uevent,
926 .dev_release = pcmcia_release_socket,
927 .class_release = pcmcia_release_socket_class,
928 .pm = PCMCIA_SOCKET_CLASS_PM_OPS,
930 EXPORT_SYMBOL(pcmcia_socket_class);
933 static int __init init_pcmcia_cs(void)
935 init_completion(&pcmcia_unload);
936 return class_register(&pcmcia_socket_class);
939 static void __exit exit_pcmcia_cs(void)
941 class_unregister(&pcmcia_socket_class);
942 wait_for_completion(&pcmcia_unload);
945 subsys_initcall(init_pcmcia_cs);
946 module_exit(exit_pcmcia_cs);