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 return dev_get_drvdata(dev);
145 EXPORT_SYMBOL(pcmcia_get_socket);
148 void pcmcia_put_socket(struct pcmcia_socket *skt)
150 put_device(&skt->dev);
152 EXPORT_SYMBOL(pcmcia_put_socket);
155 static void pcmcia_release_socket(struct device *dev)
157 struct pcmcia_socket *socket = dev_get_drvdata(dev);
159 complete(&socket->socket_released);
162 static int pccardd(void *__skt);
165 * pcmcia_register_socket - add a new pcmcia socket device
166 * @socket: the &socket to register
168 int pcmcia_register_socket(struct pcmcia_socket *socket)
170 struct task_struct *tsk;
173 if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops)
176 dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops);
178 /* try to obtain a socket number [yes, it gets ugly if we
179 * register more than 2^sizeof(unsigned int) pcmcia
180 * sockets... but the socket number is deprecated
181 * anyways, so I don't care] */
182 down_write(&pcmcia_socket_list_rwsem);
183 if (list_empty(&pcmcia_socket_list))
186 unsigned int found, i = 1;
187 struct pcmcia_socket *tmp;
190 list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
196 socket->sock = i - 1;
198 list_add_tail(&socket->socket_list, &pcmcia_socket_list);
199 up_write(&pcmcia_socket_list_rwsem);
201 #ifndef CONFIG_CARDBUS
203 * If we do not support Cardbus, ensure that
204 * the Cardbus socket capability is disabled.
206 socket->features &= ~SS_CAP_CARDBUS;
209 /* set proper values in socket->dev */
210 dev_set_drvdata(&socket->dev, socket);
211 socket->dev.class = &pcmcia_socket_class;
212 dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock);
214 /* base address = 0, map = 0 */
215 socket->cis_mem.flags = 0;
216 socket->cis_mem.speed = cis_speed;
218 INIT_LIST_HEAD(&socket->cis_cache);
220 init_completion(&socket->socket_released);
221 init_completion(&socket->thread_done);
222 mutex_init(&socket->skt_mutex);
223 mutex_init(&socket->ops_mutex);
224 spin_lock_init(&socket->thread_lock);
226 if (socket->resource_ops->init) {
227 ret = socket->resource_ops->init(socket);
232 tsk = kthread_run(pccardd, socket, "pccardd");
238 wait_for_completion(&socket->thread_done);
239 if (!socket->thread) {
240 dev_printk(KERN_WARNING, &socket->dev,
241 "PCMCIA: warning: socket thread did not start\n");
245 pcmcia_parse_events(socket, SS_DETECT);
248 * Let's try to get the PCMCIA module for 16-bit PCMCIA support.
249 * If it fails, it doesn't matter -- we still have 32-bit CardBus
250 * support to offer, so this is not a failure mode.
252 request_module_nowait("pcmcia");
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
267 * @socket: the &socket to unregister
269 void pcmcia_unregister_socket(struct pcmcia_socket *socket)
274 dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
277 kthread_stop(socket->thread);
279 /* remove from our own list */
280 down_write(&pcmcia_socket_list_rwsem);
281 list_del(&socket->socket_list);
282 up_write(&pcmcia_socket_list_rwsem);
284 /* wait for sysfs to drop all references */
285 if (socket->resource_ops->exit)
286 socket->resource_ops->exit(socket);
287 wait_for_completion(&socket->socket_released);
288 } /* pcmcia_unregister_socket */
289 EXPORT_SYMBOL(pcmcia_unregister_socket);
292 struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
294 struct pcmcia_socket *s;
296 down_read(&pcmcia_socket_list_rwsem);
297 list_for_each_entry(s, &pcmcia_socket_list, socket_list)
299 up_read(&pcmcia_socket_list_rwsem);
302 up_read(&pcmcia_socket_list_rwsem);
307 EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
310 * The central event handler. Send_event() sends an event to the
311 * 16-bit subsystem, which then calls the relevant device drivers.
312 * Parse_events() interprets the event bits from
313 * a card status change report. Do_shutdown() handles the high
314 * priority stuff associated with a card removal.
317 /* NOTE: send_event needs to be called with skt->sem held. */
319 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
323 if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
326 dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n",
327 event, priority, s->callback);
331 if (!try_module_get(s->callback->owner))
334 ret = s->callback->event(s, event, priority);
336 module_put(s->callback->owner);
341 static int socket_reset(struct pcmcia_socket *skt)
345 dev_dbg(&skt->dev, "reset\n");
347 skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
348 skt->ops->set_socket(skt, &skt->socket);
349 udelay((long)reset_time);
351 skt->socket.flags &= ~SS_RESET;
352 skt->ops->set_socket(skt, &skt->socket);
354 msleep(unreset_delay * 10);
355 for (i = 0; i < unreset_limit; i++) {
356 skt->ops->get_status(skt, &status);
358 if (!(status & SS_DETECT))
361 if (status & SS_READY)
364 msleep(unreset_check * 10);
367 dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n");
372 * socket_setup() and socket_shutdown() are called by the main event handler
373 * when card insertion and removal events are received.
374 * socket_setup() turns on socket power and resets the socket, in two stages.
375 * socket_shutdown() unconfigures a socket and turns off socket power.
377 static void socket_shutdown(struct pcmcia_socket *s)
381 dev_dbg(&s->dev, "shutdown\n");
383 send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
385 mutex_lock(&s->ops_mutex);
386 s->state &= SOCKET_INUSE | SOCKET_PRESENT;
387 msleep(shutdown_delay * 10);
388 s->state &= SOCKET_INUSE;
390 /* Blank out the socket state */
391 s->socket = dead_socket;
393 s->ops->set_socket(s, &s->socket);
394 s->irq.AssignedIRQ = s->irq.Config = 0;
398 #ifdef CONFIG_CARDBUS
403 /* give socket some time to power down */
406 s->ops->get_status(s, &status);
407 if (status & SS_POWERON) {
408 dev_printk(KERN_ERR, &s->dev,
409 "*** DANGER *** unable to remove socket power\n");
412 s->state &= ~SOCKET_INUSE;
413 mutex_unlock(&s->ops_mutex);
416 static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
420 dev_dbg(&skt->dev, "setup\n");
422 skt->ops->get_status(skt, &status);
423 if (!(status & SS_DETECT))
426 msleep(initial_delay * 10);
428 for (i = 0; i < 100; i++) {
429 skt->ops->get_status(skt, &status);
430 if (!(status & SS_DETECT))
433 if (!(status & SS_PENDING))
439 if (status & SS_PENDING) {
440 dev_printk(KERN_ERR, &skt->dev,
441 "voltage interrogation timed out.\n");
445 if (status & SS_CARDBUS) {
446 if (!(skt->features & SS_CAP_CARDBUS)) {
447 dev_printk(KERN_ERR, &skt->dev,
448 "cardbus cards are not supported.\n");
451 skt->state |= SOCKET_CARDBUS;
453 skt->state &= ~SOCKET_CARDBUS;
456 * Decode the card voltage requirements, and apply power to the card.
458 if (status & SS_3VCARD)
459 skt->socket.Vcc = skt->socket.Vpp = 33;
460 else if (!(status & SS_XVCARD))
461 skt->socket.Vcc = skt->socket.Vpp = 50;
463 dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n");
468 skt->power_hook(skt, HOOK_POWER_PRE);
470 skt->socket.flags = 0;
471 skt->ops->set_socket(skt, &skt->socket);
474 * Wait "vcc_settle" for the supply to stabilise.
476 msleep(vcc_settle * 10);
478 skt->ops->get_status(skt, &status);
479 if (!(status & SS_POWERON)) {
480 dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n");
484 status = socket_reset(skt);
487 skt->power_hook(skt, HOOK_POWER_POST);
493 * Handle card insertion. Setup the socket, reset the card,
494 * and then tell the rest of PCMCIA that a card is present.
496 static int socket_insert(struct pcmcia_socket *skt)
500 dev_dbg(&skt->dev, "insert\n");
502 mutex_lock(&skt->ops_mutex);
503 WARN_ON(skt->state & SOCKET_INUSE);
504 skt->state |= SOCKET_INUSE;
506 ret = socket_setup(skt, setup_delay);
508 skt->state |= SOCKET_PRESENT;
510 dev_printk(KERN_NOTICE, &skt->dev,
511 "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 dev_dbg(&skt->dev, "insert done\n");
522 mutex_unlock(&skt->ops_mutex);
524 send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
526 mutex_unlock(&skt->ops_mutex);
527 socket_shutdown(skt);
533 static int socket_suspend(struct pcmcia_socket *skt)
535 if (skt->state & SOCKET_SUSPEND)
538 mutex_lock(&skt->ops_mutex);
539 skt->suspended_state = skt->state;
541 send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
542 skt->socket = dead_socket;
543 skt->ops->set_socket(skt, &skt->socket);
544 if (skt->ops->suspend)
545 skt->ops->suspend(skt);
546 skt->state |= SOCKET_SUSPEND;
547 mutex_unlock(&skt->ops_mutex);
551 static int socket_early_resume(struct pcmcia_socket *skt)
553 mutex_lock(&skt->ops_mutex);
554 skt->socket = dead_socket;
556 skt->ops->set_socket(skt, &skt->socket);
557 if (skt->state & SOCKET_PRESENT)
558 skt->resume_status = socket_setup(skt, resume_delay);
559 mutex_unlock(&skt->ops_mutex);
563 static int socket_late_resume(struct pcmcia_socket *skt)
565 mutex_lock(&skt->ops_mutex);
566 skt->state &= ~SOCKET_SUSPEND;
567 mutex_unlock(&skt->ops_mutex);
569 if (!(skt->state & SOCKET_PRESENT))
570 return socket_insert(skt);
572 if (skt->resume_status) {
573 socket_shutdown(skt);
577 if (skt->suspended_state != skt->state) {
579 "suspend state 0x%x != resume state 0x%x\n",
580 skt->suspended_state, skt->state);
582 socket_shutdown(skt);
583 return socket_insert(skt);
586 #ifdef CONFIG_CARDBUS
587 if (skt->state & SOCKET_CARDBUS) {
588 /* We can't be sure the CardBus card is the same
589 * as the one previously inserted. Therefore, remove
597 send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
602 * Resume a socket. If a card is present, verify its CIS against
603 * our cached copy. If they are different, the card has been
604 * replaced, and we need to tell the drivers.
606 static int socket_resume(struct pcmcia_socket *skt)
608 if (!(skt->state & SOCKET_SUSPEND))
611 socket_early_resume(skt);
612 return socket_late_resume(skt);
615 static void socket_remove(struct pcmcia_socket *skt)
617 dev_printk(KERN_NOTICE, &skt->dev,
618 "pccard: card ejected from slot %d\n", skt->sock);
619 socket_shutdown(skt);
623 * Process a socket card detect status change.
625 * If we don't have a card already present, delay the detect event for
626 * about 20ms (to be on the safe side) before reading the socket status.
628 * Some i82365-based systems send multiple SS_DETECT events during card
629 * insertion, and the "card present" status bit seems to bounce. This
630 * will probably be true with GPIO-based card detection systems after
631 * the product has aged.
633 static void socket_detect_change(struct pcmcia_socket *skt)
635 if (!(skt->state & SOCKET_SUSPEND)) {
638 if (!(skt->state & SOCKET_PRESENT))
641 skt->ops->get_status(skt, &status);
642 if ((skt->state & SOCKET_PRESENT) &&
643 !(status & SS_DETECT))
645 if (!(skt->state & SOCKET_PRESENT) &&
646 (status & SS_DETECT))
651 static int pccardd(void *__skt)
653 struct pcmcia_socket *skt = __skt;
656 skt->thread = current;
657 skt->socket = dead_socket;
659 skt->ops->set_socket(skt, &skt->socket);
661 /* register with the device core */
662 ret = device_register(&skt->dev);
664 dev_printk(KERN_WARNING, &skt->dev,
665 "PCMCIA: unable to register socket\n");
667 complete(&skt->thread_done);
670 ret = pccard_sysfs_add_socket(&skt->dev);
672 dev_warn(&skt->dev, "err %d adding socket attributes\n", ret);
674 complete(&skt->thread_done);
681 set_current_state(TASK_INTERRUPTIBLE);
683 spin_lock_irqsave(&skt->thread_lock, flags);
684 events = skt->thread_events;
685 skt->thread_events = 0;
686 spin_unlock_irqrestore(&skt->thread_lock, flags);
689 mutex_lock(&skt->skt_mutex);
690 if (events & SS_DETECT)
691 socket_detect_change(skt);
692 if (events & SS_BATDEAD)
693 send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
694 if (events & SS_BATWARN)
695 send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
696 if (events & SS_READY)
697 send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
698 mutex_unlock(&skt->skt_mutex);
702 if (kthread_should_stop())
708 /* make sure we are running before we exit */
709 set_current_state(TASK_RUNNING);
711 /* shut down socket, if a device is still present */
712 if (skt->state & SOCKET_PRESENT) {
713 mutex_lock(&skt->skt_mutex);
715 mutex_unlock(&skt->skt_mutex);
718 /* remove from the device core */
719 pccard_sysfs_remove_socket(&skt->dev);
720 device_unregister(&skt->dev);
726 * Yenta (at least) probes interrupts before registering the socket and
727 * starting the handler thread.
729 void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
732 dev_dbg(&s->dev, "parse_events: events %08x\n", events);
734 spin_lock_irqsave(&s->thread_lock, flags);
735 s->thread_events |= events;
736 spin_unlock_irqrestore(&s->thread_lock, flags);
738 wake_up_process(s->thread);
740 } /* pcmcia_parse_events */
741 EXPORT_SYMBOL(pcmcia_parse_events);
744 /* register pcmcia_callback */
745 int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
749 /* s->skt_mutex also protects s->callback */
750 mutex_lock(&s->skt_mutex);
761 if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
762 send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
766 mutex_unlock(&s->skt_mutex);
770 EXPORT_SYMBOL(pccard_register_pcmcia);
773 /* I'm not sure which "reset" function this is supposed to use,
774 * but for now, it uses the low-level interface's reset, not the
778 int pcmcia_reset_card(struct pcmcia_socket *skt)
782 dev_dbg(&skt->dev, "resetting socket\n");
784 mutex_lock(&skt->skt_mutex);
786 if (!(skt->state & SOCKET_PRESENT)) {
787 dev_dbg(&skt->dev, "can't reset, not present\n");
791 if (skt->state & SOCKET_SUSPEND) {
792 dev_dbg(&skt->dev, "can't reset, suspended\n");
796 if (skt->state & SOCKET_CARDBUS) {
797 dev_dbg(&skt->dev, "can't reset, is cardbus\n");
802 ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
804 send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
806 skt->callback->suspend(skt);
807 mutex_lock(&skt->ops_mutex);
808 ret = socket_reset(skt);
809 mutex_unlock(&skt->ops_mutex);
811 send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
813 skt->callback->resume(skt);
819 mutex_unlock(&skt->skt_mutex);
823 EXPORT_SYMBOL(pcmcia_reset_card);
826 /* These shut down or wake up a socket. They are sort of user
827 * initiated versions of the APM suspend and resume actions.
829 int pcmcia_suspend_card(struct pcmcia_socket *skt)
833 dev_dbg(&skt->dev, "suspending socket\n");
835 mutex_lock(&skt->skt_mutex);
837 if (!(skt->state & SOCKET_PRESENT)) {
841 if (skt->state & SOCKET_CARDBUS) {
846 ret = skt->callback->suspend(skt);
850 ret = socket_suspend(skt);
852 mutex_unlock(&skt->skt_mutex);
856 EXPORT_SYMBOL(pcmcia_suspend_card);
859 int pcmcia_resume_card(struct pcmcia_socket *skt)
863 dev_dbg(&skt->dev, "waking up socket\n");
865 mutex_lock(&skt->skt_mutex);
867 if (!(skt->state & SOCKET_PRESENT)) {
871 if (skt->state & SOCKET_CARDBUS) {
875 ret = socket_resume(skt);
876 if (!ret && skt->callback)
877 skt->callback->resume(skt);
879 mutex_unlock(&skt->skt_mutex);
883 EXPORT_SYMBOL(pcmcia_resume_card);
886 /* These handle user requests to eject or insert a card. */
887 int pcmcia_eject_card(struct pcmcia_socket *skt)
891 dev_dbg(&skt->dev, "user eject request\n");
893 mutex_lock(&skt->skt_mutex);
895 if (!(skt->state & SOCKET_PRESENT)) {
900 ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
909 mutex_unlock(&skt->skt_mutex);
913 EXPORT_SYMBOL(pcmcia_eject_card);
916 int pcmcia_insert_card(struct pcmcia_socket *skt)
920 dev_dbg(&skt->dev, "user insert request\n");
922 mutex_lock(&skt->skt_mutex);
924 if (skt->state & SOCKET_PRESENT) {
928 if (socket_insert(skt) == -ENODEV) {
934 mutex_unlock(&skt->skt_mutex);
938 EXPORT_SYMBOL(pcmcia_insert_card);
941 static int pcmcia_socket_uevent(struct device *dev,
942 struct kobj_uevent_env *env)
944 struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
946 if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
953 static struct completion pcmcia_unload;
955 static void pcmcia_release_socket_class(struct class *data)
957 complete(&pcmcia_unload);
961 struct class pcmcia_socket_class = {
962 .name = "pcmcia_socket",
963 .dev_uevent = pcmcia_socket_uevent,
964 .dev_release = pcmcia_release_socket,
965 .class_release = pcmcia_release_socket_class,
967 EXPORT_SYMBOL(pcmcia_socket_class);
970 static int __init init_pcmcia_cs(void)
972 init_completion(&pcmcia_unload);
973 return class_register(&pcmcia_socket_class);
976 static void __exit exit_pcmcia_cs(void)
978 class_unregister(&pcmcia_socket_class);
979 wait_for_completion(&pcmcia_unload);
982 subsys_initcall(init_pcmcia_cs);
983 module_exit(exit_pcmcia_cs);