2 * Initialization routines
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <sound/driver.h>
23 #include <linux/init.h>
24 #include <linux/sched.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/ctype.h>
29 #include <linux/pci.h>
31 #include <linux/platform_device.h>
33 #include <sound/core.h>
34 #include <sound/control.h>
35 #include <sound/info.h>
37 struct snd_shutdown_f_ops
{
38 struct file_operations f_ops
;
39 struct snd_shutdown_f_ops
*next
;
42 unsigned int snd_cards_lock
= 0; /* locked for registering/using */
43 snd_card_t
*snd_cards
[SNDRV_CARDS
] = {[0 ... (SNDRV_CARDS
-1)] = NULL
};
44 DEFINE_RWLOCK(snd_card_rwlock
);
46 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
47 int (*snd_mixer_oss_notify_callback
)(snd_card_t
*card
, int free_flag
);
50 static void snd_card_id_read(snd_info_entry_t
*entry
, snd_info_buffer_t
* buffer
)
52 snd_iprintf(buffer
, "%s\n", entry
->card
->id
);
55 static void snd_card_free_thread(void * __card
);
58 * snd_card_new - create and initialize a soundcard structure
59 * @idx: card index (address) [0 ... (SNDRV_CARDS-1)]
60 * @xid: card identification (ASCII string)
61 * @module: top level module for locking
62 * @extra_size: allocate this extra size after the main soundcard structure
64 * Creates and initializes a soundcard structure.
66 * Returns kmallocated snd_card_t structure. Creates the ALSA control interface
67 * (which is blocked until snd_card_register function is called).
69 snd_card_t
*snd_card_new(int idx
, const char *xid
,
70 struct module
*module
, int extra_size
)
77 card
= kzalloc(sizeof(*card
) + extra_size
, GFP_KERNEL
);
81 if (!snd_info_check_reserved_words(xid
))
83 strlcpy(card
->id
, xid
, sizeof(card
->id
));
86 write_lock(&snd_card_rwlock
);
89 for (idx2
= 0; idx2
< SNDRV_CARDS
; idx2
++)
90 if (~snd_cards_lock
& idx
& 1<<idx2
) {
92 if (idx
>= snd_ecards_limit
)
93 snd_ecards_limit
= idx
+ 1;
96 } else if (idx
< snd_ecards_limit
) {
97 if (snd_cards_lock
& (1 << idx
))
98 err
= -ENODEV
; /* invalid */
99 } else if (idx
< SNDRV_CARDS
)
100 snd_ecards_limit
= idx
+ 1; /* increase the limit */
103 if (idx
< 0 || err
< 0) {
104 write_unlock(&snd_card_rwlock
);
105 snd_printk(KERN_ERR
"cannot find the slot for index %d (range 0-%i)\n", idx
, snd_ecards_limit
- 1);
108 snd_cards_lock
|= 1 << idx
; /* lock it */
109 write_unlock(&snd_card_rwlock
);
111 card
->module
= module
;
112 INIT_LIST_HEAD(&card
->devices
);
113 init_rwsem(&card
->controls_rwsem
);
114 rwlock_init(&card
->ctl_files_rwlock
);
115 INIT_LIST_HEAD(&card
->controls
);
116 INIT_LIST_HEAD(&card
->ctl_files
);
117 spin_lock_init(&card
->files_lock
);
118 init_waitqueue_head(&card
->shutdown_sleep
);
119 INIT_WORK(&card
->free_workq
, snd_card_free_thread
, card
);
121 init_MUTEX(&card
->power_lock
);
122 init_waitqueue_head(&card
->power_sleep
);
124 /* the control interface cannot be accessed from the user space until */
125 /* snd_cards_bitmask and snd_cards are set with snd_card_register */
126 if ((err
= snd_ctl_create(card
)) < 0) {
127 snd_printd("unable to register control minors\n");
130 if ((err
= snd_info_card_create(card
)) < 0) {
131 snd_printd("unable to create card info\n");
135 card
->private_data
= (char *)card
+ sizeof(snd_card_t
);
139 snd_device_free_all(card
, SNDRV_DEV_CMD_PRE
);
145 static unsigned int snd_disconnect_poll(struct file
* file
, poll_table
* wait
)
147 return POLLERR
| POLLNVAL
;
151 * snd_card_disconnect - disconnect all APIs from the file-operations (user space)
152 * @card: soundcard structure
154 * Disconnects all APIs from the file-operations (user space).
156 * Returns zero, otherwise a negative error code.
158 * Note: The current implementation replaces all active file->f_op with special
159 * dummy file operations (they do nothing except release).
161 int snd_card_disconnect(snd_card_t
* card
)
163 struct snd_monitor_file
*mfile
;
165 struct snd_shutdown_f_ops
*s_f_ops
;
166 struct file_operations
*f_ops
, *old_f_ops
;
169 spin_lock(&card
->files_lock
);
170 if (card
->shutdown
) {
171 spin_unlock(&card
->files_lock
);
175 spin_unlock(&card
->files_lock
);
177 /* phase 1: disable fops (user space) operations for ALSA API */
178 write_lock(&snd_card_rwlock
);
179 snd_cards
[card
->number
] = NULL
;
180 write_unlock(&snd_card_rwlock
);
182 /* phase 2: replace file->f_op with special dummy operations */
184 spin_lock(&card
->files_lock
);
189 /* it's critical part, use endless loop */
190 /* we have no room to fail */
191 s_f_ops
= kmalloc(sizeof(struct snd_shutdown_f_ops
), GFP_ATOMIC
);
193 panic("Atomic allocation failed for snd_shutdown_f_ops!");
195 f_ops
= &s_f_ops
->f_ops
;
197 memset(f_ops
, 0, sizeof(*f_ops
));
198 f_ops
->owner
= file
->f_op
->owner
;
199 f_ops
->release
= file
->f_op
->release
;
200 f_ops
->poll
= snd_disconnect_poll
;
202 s_f_ops
->next
= card
->s_f_ops
;
203 card
->s_f_ops
= s_f_ops
;
205 f_ops
= fops_get(f_ops
);
207 old_f_ops
= file
->f_op
;
208 file
->f_op
= f_ops
; /* must be atomic */
213 spin_unlock(&card
->files_lock
);
215 /* phase 3: notify all connected devices about disconnection */
216 /* at this point, they cannot respond to any calls except release() */
218 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
219 if (snd_mixer_oss_notify_callback
)
220 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_DISCONNECT
);
223 /* notify all devices that we are disconnected */
224 err
= snd_device_disconnect_all(card
);
226 snd_printk(KERN_ERR
"not all devices for card %i can be disconnected\n", card
->number
);
231 #ifdef CONFIG_SND_GENERIC_DRIVER
232 static void snd_generic_device_unregister(snd_card_t
*card
);
234 #define snd_generic_device_unregister(x) /*NOP*/
238 * snd_card_free - frees given soundcard structure
239 * @card: soundcard structure
241 * This function releases the soundcard structure and the all assigned
242 * devices automatically. That is, you don't have to release the devices
245 * Returns zero. Frees all associated devices and frees the control
246 * interface associated to given soundcard.
248 int snd_card_free(snd_card_t
* card
)
250 struct snd_shutdown_f_ops
*s_f_ops
;
254 write_lock(&snd_card_rwlock
);
255 snd_cards
[card
->number
] = NULL
;
256 write_unlock(&snd_card_rwlock
);
259 wake_up(&card
->power_sleep
);
261 /* wait, until all devices are ready for the free operation */
262 wait_event(card
->shutdown_sleep
, card
->files
== NULL
);
264 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
265 if (snd_mixer_oss_notify_callback
)
266 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_FREE
);
268 if (snd_device_free_all(card
, SNDRV_DEV_CMD_PRE
) < 0) {
269 snd_printk(KERN_ERR
"unable to free all devices (pre)\n");
270 /* Fatal, but this situation should never occur */
272 if (snd_device_free_all(card
, SNDRV_DEV_CMD_NORMAL
) < 0) {
273 snd_printk(KERN_ERR
"unable to free all devices (normal)\n");
274 /* Fatal, but this situation should never occur */
276 if (snd_device_free_all(card
, SNDRV_DEV_CMD_POST
) < 0) {
277 snd_printk(KERN_ERR
"unable to free all devices (post)\n");
278 /* Fatal, but this situation should never occur */
280 if (card
->private_free
)
281 card
->private_free(card
);
283 snd_info_unregister(card
->proc_id
);
284 if (snd_info_card_free(card
) < 0) {
285 snd_printk(KERN_WARNING
"unable to free card info\n");
286 /* Not fatal error */
288 snd_generic_device_unregister(card
);
289 while (card
->s_f_ops
) {
290 s_f_ops
= card
->s_f_ops
;
291 card
->s_f_ops
= s_f_ops
->next
;
294 write_lock(&snd_card_rwlock
);
295 snd_cards_lock
&= ~(1 << card
->number
);
296 write_unlock(&snd_card_rwlock
);
301 static void snd_card_free_thread(void * __card
)
303 snd_card_t
*card
= __card
;
304 struct module
* module
= card
->module
;
306 if (!try_module_get(module
)) {
307 snd_printk(KERN_ERR
"unable to lock toplevel module for card %i in free thread\n", card
->number
);
317 * snd_card_free_in_thread - call snd_card_free() in thread
318 * @card: soundcard structure
320 * This function schedules the call of snd_card_free() function in a
321 * work queue. When all devices are released (non-busy), the work
322 * is woken up and calls snd_card_free().
324 * When a card can be disconnected at any time by hotplug service,
325 * this function should be used in disconnect (or detach) callback
326 * instead of calling snd_card_free() directly.
328 * Returns - zero otherwise a negative error code if the start of thread failed.
330 int snd_card_free_in_thread(snd_card_t
* card
)
332 if (card
->files
== NULL
) {
337 if (schedule_work(&card
->free_workq
))
340 snd_printk(KERN_ERR
"schedule_work() failed in snd_card_free_in_thread for card %i\n", card
->number
);
341 /* try to free the structure immediately */
346 static void choose_default_id(snd_card_t
* card
)
348 int i
, len
, idx_flag
= 0, loops
= 8;
351 id
= spos
= card
->shortname
;
352 while (*id
!= '\0') {
358 while (*spos
!= '\0' && !isalnum(*spos
))
361 *id
++ = isalpha(card
->shortname
[0]) ? card
->shortname
[0] : 'D';
362 while (*spos
!= '\0' && (size_t)(id
- card
->id
) < sizeof(card
->id
) - 1) {
372 strcpy(id
, "default");
376 snd_printk(KERN_ERR
"unable to choose default card id (%s)\n", id
);
377 strcpy(card
->id
, card
->proc_root
->name
);
380 if (!snd_info_check_reserved_words(id
))
382 for (i
= 0; i
< snd_ecards_limit
; i
++) {
383 if (snd_cards
[i
] && !strcmp(snd_cards
[i
]->id
, id
))
392 else if ((size_t)len
<= sizeof(card
->id
) - 3) {
397 if ((size_t)len
<= sizeof(card
->id
) - 2)
408 * snd_card_register - register the soundcard
409 * @card: soundcard structure
411 * This function registers all the devices assigned to the soundcard.
412 * Until calling this, the ALSA control interface is blocked from the
413 * external accesses. Thus, you should call this function at the end
414 * of the initialization of the card.
416 * Returns zero otherwise a negative error code if the registrain failed.
418 int snd_card_register(snd_card_t
* card
)
421 snd_info_entry_t
*entry
;
423 snd_assert(card
!= NULL
, return -EINVAL
);
424 if ((err
= snd_device_register_all(card
)) < 0)
426 write_lock(&snd_card_rwlock
);
427 if (snd_cards
[card
->number
]) {
428 /* already registered */
429 write_unlock(&snd_card_rwlock
);
432 if (card
->id
[0] == '\0')
433 choose_default_id(card
);
434 snd_cards
[card
->number
] = card
;
435 write_unlock(&snd_card_rwlock
);
436 if ((err
= snd_info_card_register(card
)) < 0) {
437 snd_printd("unable to create card info\n");
440 if ((entry
= snd_info_create_card_entry(card
, "id", card
->proc_root
)) == NULL
) {
441 snd_printd("unable to create card entry\n");
444 entry
->c
.text
.read_size
= PAGE_SIZE
;
445 entry
->c
.text
.read
= snd_card_id_read
;
446 if (snd_info_register(entry
) < 0) {
447 snd_info_free_entry(entry
);
450 card
->proc_id
= entry
;
452 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
453 if (snd_mixer_oss_notify_callback
)
454 snd_mixer_oss_notify_callback(card
, SND_MIXER_OSS_NOTIFY_REGISTER
);
459 static snd_info_entry_t
*snd_card_info_entry
= NULL
;
461 static void snd_card_info_read(snd_info_entry_t
*entry
, snd_info_buffer_t
* buffer
)
466 for (idx
= count
= 0; idx
< SNDRV_CARDS
; idx
++) {
467 read_lock(&snd_card_rwlock
);
468 if ((card
= snd_cards
[idx
]) != NULL
) {
470 snd_iprintf(buffer
, "%i [%-15s]: %s - %s\n",
475 snd_iprintf(buffer
, " %s\n",
478 read_unlock(&snd_card_rwlock
);
481 snd_iprintf(buffer
, "--- no soundcards ---\n");
484 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
486 void snd_card_info_read_oss(snd_info_buffer_t
* buffer
)
491 for (idx
= count
= 0; idx
< SNDRV_CARDS
; idx
++) {
492 read_lock(&snd_card_rwlock
);
493 if ((card
= snd_cards
[idx
]) != NULL
) {
495 snd_iprintf(buffer
, "%s\n", card
->longname
);
497 read_unlock(&snd_card_rwlock
);
500 snd_iprintf(buffer
, "--- no soundcards ---\n");
507 static snd_info_entry_t
*snd_card_module_info_entry
;
508 static void snd_card_module_info_read(snd_info_entry_t
*entry
, snd_info_buffer_t
* buffer
)
513 for (idx
= 0; idx
< SNDRV_CARDS
; idx
++) {
514 read_lock(&snd_card_rwlock
);
515 if ((card
= snd_cards
[idx
]) != NULL
)
516 snd_iprintf(buffer
, "%i %s\n", idx
, card
->module
->name
);
517 read_unlock(&snd_card_rwlock
);
522 int __init
snd_card_info_init(void)
524 snd_info_entry_t
*entry
;
526 entry
= snd_info_create_module_entry(THIS_MODULE
, "cards", NULL
);
529 entry
->c
.text
.read_size
= PAGE_SIZE
;
530 entry
->c
.text
.read
= snd_card_info_read
;
531 if (snd_info_register(entry
) < 0) {
532 snd_info_free_entry(entry
);
535 snd_card_info_entry
= entry
;
538 entry
= snd_info_create_module_entry(THIS_MODULE
, "modules", NULL
);
540 entry
->c
.text
.read_size
= PAGE_SIZE
;
541 entry
->c
.text
.read
= snd_card_module_info_read
;
542 if (snd_info_register(entry
) < 0)
543 snd_info_free_entry(entry
);
545 snd_card_module_info_entry
= entry
;
552 int __exit
snd_card_info_done(void)
554 if (snd_card_info_entry
)
555 snd_info_unregister(snd_card_info_entry
);
557 if (snd_card_module_info_entry
)
558 snd_info_unregister(snd_card_module_info_entry
);
564 * snd_component_add - add a component string
565 * @card: soundcard structure
566 * @component: the component id string
568 * This function adds the component id string to the supported list.
569 * The component can be referred from the alsa-lib.
571 * Returns zero otherwise a negative error code.
574 int snd_component_add(snd_card_t
*card
, const char *component
)
577 int len
= strlen(component
);
579 ptr
= strstr(card
->components
, component
);
581 if (ptr
[len
] == '\0' || ptr
[len
] == ' ') /* already there */
584 if (strlen(card
->components
) + 1 + len
+ 1 > sizeof(card
->components
)) {
588 if (card
->components
[0] != '\0')
589 strcat(card
->components
, " ");
590 strcat(card
->components
, component
);
595 * snd_card_file_add - add the file to the file list of the card
596 * @card: soundcard structure
597 * @file: file pointer
599 * This function adds the file to the file linked-list of the card.
600 * This linked-list is used to keep tracking the connection state,
601 * and to avoid the release of busy resources by hotplug.
603 * Returns zero or a negative error code.
605 int snd_card_file_add(snd_card_t
*card
, struct file
*file
)
607 struct snd_monitor_file
*mfile
;
609 mfile
= kmalloc(sizeof(*mfile
), GFP_KERNEL
);
614 spin_lock(&card
->files_lock
);
615 if (card
->shutdown
) {
616 spin_unlock(&card
->files_lock
);
620 mfile
->next
= card
->files
;
622 spin_unlock(&card
->files_lock
);
627 * snd_card_file_remove - remove the file from the file list
628 * @card: soundcard structure
629 * @file: file pointer
631 * This function removes the file formerly added to the card via
632 * snd_card_file_add() function.
633 * If all files are removed and the release of the card is
634 * scheduled, it will wake up the the thread to call snd_card_free()
635 * (see snd_card_free_in_thread() function).
637 * Returns zero or a negative error code.
639 int snd_card_file_remove(snd_card_t
*card
, struct file
*file
)
641 struct snd_monitor_file
*mfile
, *pfile
= NULL
;
643 spin_lock(&card
->files_lock
);
646 if (mfile
->file
== file
) {
648 pfile
->next
= mfile
->next
;
650 card
->files
= mfile
->next
;
656 spin_unlock(&card
->files_lock
);
657 if (card
->files
== NULL
)
658 wake_up(&card
->shutdown_sleep
);
660 snd_printk(KERN_ERR
"ALSA card file remove problem (%p)\n", file
);
667 #ifdef CONFIG_SND_GENERIC_DRIVER
669 * generic device without a proper bus using platform_device
672 struct snd_generic_device
{
673 struct platform_device pdev
;
677 #define get_snd_generic_card(dev) container_of(to_platform_device(dev), struct snd_generic_device, pdev)->card
679 #define SND_GENERIC_NAME "snd_generic"
682 static int snd_generic_suspend(struct device
*dev
, pm_message_t state
);
683 static int snd_generic_resume(struct device
*dev
);
686 /* initialized in sound.c */
687 struct device_driver snd_generic_driver
= {
688 .name
= SND_GENERIC_NAME
,
689 .bus
= &platform_bus_type
,
691 .suspend
= snd_generic_suspend
,
692 .resume
= snd_generic_resume
,
696 void snd_generic_device_release(struct device
*dev
)
700 static int snd_generic_device_register(snd_card_t
*card
)
702 struct snd_generic_device
*dev
;
705 if (card
->generic_dev
)
706 return 0; /* already registered */
708 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
710 snd_printk(KERN_ERR
"can't allocate generic_device\n");
714 dev
->pdev
.name
= SND_GENERIC_NAME
;
715 dev
->pdev
.id
= card
->number
;
716 dev
->pdev
.dev
.release
= snd_generic_device_release
;
718 if ((err
= platform_device_register(&dev
->pdev
)) < 0) {
722 card
->generic_dev
= dev
;
726 static void snd_generic_device_unregister(snd_card_t
*card
)
728 struct snd_generic_device
*dev
= card
->generic_dev
;
730 platform_device_unregister(&dev
->pdev
);
732 card
->generic_dev
= NULL
;
737 * snd_card_set_generic_dev - assign the generic device to the card
738 * @card: soundcard structure
740 * Assigns a generic device to the card. This function is provided as the
741 * last resort, for devices without any proper bus. Thus this won't override
742 * the device already assigned to the card.
744 * Returns zero if successful, or a negative error code.
746 int snd_card_set_generic_dev(snd_card_t
*card
)
749 if ((err
= snd_generic_device_register(card
)) < 0)
752 snd_card_set_dev(card
, &card
->generic_dev
->pdev
.dev
);
755 #endif /* CONFIG_SND_GENERIC_DRIVER */
759 * snd_power_wait - wait until the power-state is changed.
760 * @card: soundcard structure
761 * @power_state: expected power state
762 * @file: file structure for the O_NONBLOCK check (optional)
764 * Waits until the power-state is changed.
766 * Note: the power lock must be active before call.
768 int snd_power_wait(snd_card_t
*card
, unsigned int power_state
, struct file
*file
)
774 if (snd_power_get_state(card
) == power_state
)
776 init_waitqueue_entry(&wait
, current
);
777 add_wait_queue(&card
->power_sleep
, &wait
);
779 if (card
->shutdown
) {
783 if (snd_power_get_state(card
) == power_state
)
785 #if 0 /* block all devices */
786 if (file
&& (file
->f_flags
& O_NONBLOCK
)) {
791 set_current_state(TASK_UNINTERRUPTIBLE
);
792 snd_power_unlock(card
);
793 schedule_timeout(30 * HZ
);
794 snd_power_lock(card
);
796 remove_wait_queue(&card
->power_sleep
, &wait
);
801 * snd_card_set_pm_callback - set the PCI power-management callbacks
802 * @card: soundcard structure
803 * @suspend: suspend callback function
804 * @resume: resume callback function
805 * @private_data: private data to pass to the callback functions
807 * Sets the power-management callback functions of the card.
808 * These callbacks are called from ALSA's common PCI suspend/resume
809 * handler and from the control API.
811 int snd_card_set_pm_callback(snd_card_t
*card
,
812 int (*suspend
)(snd_card_t
*, pm_message_t
),
813 int (*resume
)(snd_card_t
*),
816 card
->pm_suspend
= suspend
;
817 card
->pm_resume
= resume
;
818 card
->pm_private_data
= private_data
;
822 #ifdef CONFIG_SND_GENERIC_DRIVER
823 /* suspend/resume callbacks for snd_generic platform device */
824 static int snd_generic_suspend(struct device
*dev
, pm_message_t state
)
828 card
= get_snd_generic_card(dev
);
829 if (card
->power_state
== SNDRV_CTL_POWER_D3hot
)
831 if (card
->pm_suspend
)
832 card
->pm_suspend(card
, PMSG_SUSPEND
);
833 snd_power_change_state(card
, SNDRV_CTL_POWER_D3hot
);
837 static int snd_generic_resume(struct device
*dev
)
841 card
= get_snd_generic_card(dev
);
842 if (card
->power_state
== SNDRV_CTL_POWER_D0
)
845 card
->pm_resume(card
);
846 snd_power_change_state(card
, SNDRV_CTL_POWER_D0
);
851 * snd_card_set_generic_pm_callback - set the generic power-management callbacks
852 * @card: soundcard structure
853 * @suspend: suspend callback function
854 * @resume: resume callback function
855 * @private_data: private data to pass to the callback functions
857 * Registers the power-management and sets the lowlevel callbacks for
858 * the given card. These callbacks are called from the ALSA's common
859 * PM handler and from the control API.
861 int snd_card_set_generic_pm_callback(snd_card_t
*card
,
862 int (*suspend
)(snd_card_t
*, pm_message_t
),
863 int (*resume
)(snd_card_t
*),
867 if ((err
= snd_generic_device_register(card
)) < 0)
869 return snd_card_set_pm_callback(card
, suspend
, resume
, private_data
);
871 #endif /* CONFIG_SND_GENERIC_DRIVER */
874 int snd_card_pci_suspend(struct pci_dev
*dev
, pm_message_t state
)
876 snd_card_t
*card
= pci_get_drvdata(dev
);
878 if (! card
|| ! card
->pm_suspend
)
880 if (card
->power_state
== SNDRV_CTL_POWER_D3hot
)
882 err
= card
->pm_suspend(card
, PMSG_SUSPEND
);
884 snd_power_change_state(card
, SNDRV_CTL_POWER_D3hot
);
888 int snd_card_pci_resume(struct pci_dev
*dev
)
890 snd_card_t
*card
= pci_get_drvdata(dev
);
891 if (! card
|| ! card
->pm_resume
)
893 if (card
->power_state
== SNDRV_CTL_POWER_D0
)
895 /* restore the PCI config space */
896 pci_restore_state(dev
);
897 card
->pm_resume(card
);
898 snd_power_change_state(card
, SNDRV_CTL_POWER_D0
);
903 #endif /* CONFIG_PM */