From: Greg KH <greg@kroah.com>
Adds sysfs sound class support for all ALSA drivers
Note, this is based on a previous patch from Leann Ogasawara
<ogasawara@osdl.org>, but modified a lot by me.
25-akpm/include/sound/core.h | 1 +
25-akpm/sound/core/sound.c | 34 ++++++++++++++++++++--------------
25-akpm/sound/pci/intel8x0.c | 1 +
3 files changed, 22 insertions(+), 14 deletions(-)
diff -puN include/sound/core.h~sysfs-add-alsa-class include/sound/core.h
--- 25/include/sound/core.h~sysfs-add-alsa-class Wed Jan 7 16:11:49 2004
+++ 25-akpm/include/sound/core.h Wed Jan 7 16:11:49 2004
@@ -160,6 +160,7 @@ struct _snd_card {
int shutdown; /* this card is going down */
wait_queue_head_t shutdown_sleep;
struct work_struct free_workq; /* for free in workqueue */
+ struct device *dev;
#ifdef CONFIG_PM
int (*set_power_state) (snd_card_t *card, unsigned int state);
diff -puN sound/core/sound.c~sysfs-add-alsa-class sound/core/sound.c
--- 25/sound/core/sound.c~sysfs-add-alsa-class Wed Jan 7 16:11:49 2004
+++ 25-akpm/sound/core/sound.c Wed Jan 7 16:11:49 2004
@@ -38,9 +38,7 @@
static int major = CONFIG_SND_MAJOR;
int snd_major;
static int cards_limit = SNDRV_CARDS;
-#ifdef CONFIG_DEVFS_FS
static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO;
-#endif
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards.");
@@ -66,6 +64,7 @@ static struct list_head snd_minors_hash[
static DECLARE_MUTEX(sound_mutex);
+extern struct class sound_class;
#ifdef CONFIG_KMOD
/**
@@ -203,6 +202,7 @@ int snd_register_device(int type, snd_ca
{
int minor = snd_kernel_minor(type, card, dev);
snd_minor_t *preg;
+ struct device *device = NULL;
if (minor < 0)
return minor;
@@ -221,10 +221,14 @@ int snd_register_device(int type, snd_ca
return -EBUSY;
}
list_add_tail(&preg->list, &snd_minors_hash[SNDRV_MINOR_CARD(minor)]);
-#ifdef CONFIG_DEVFS_FS
- if (strncmp(name, "controlC", 8)) /* created in sound.c */
+
+ if (strncmp(name, "controlC", 8)) { /* created in sound.c */
devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name);
-#endif
+ if (card)
+ device = card->dev;
+ simple_add_class_device(&sound_class, MKDEV(major, minor), device, name);
+ }
+
up(&sound_mutex);
return 0;
}
@@ -252,10 +256,12 @@ int snd_unregister_device(int type, snd_
up(&sound_mutex);
return -EINVAL;
}
-#ifdef CONFIG_DEVFS_FS
- if (strncmp(mptr->name, "controlC", 8)) /* created in sound.c */
+
+ if (strncmp(mptr->name, "controlC", 8)) { /* created in sound.c */
devfs_remove("snd/%s", mptr->name);
-#endif
+ simple_remove_class_device(MKDEV(major, minor));
+ }
+
list_del(&mptr->list);
up(&sound_mutex);
kfree(mptr);
@@ -322,9 +328,7 @@ int __exit snd_minor_info_done(void)
static int __init alsa_sound_init(void)
{
-#ifdef CONFIG_DEVFS_FS
short controlnum;
-#endif
#ifdef CONFIG_SND_OSSEMUL
int err;
#endif
@@ -358,10 +362,10 @@ static int __init alsa_sound_init(void)
#ifdef CONFIG_SND_OSSEMUL
snd_info_minor_register();
#endif
-#ifdef CONFIG_DEVFS_FS
- for (controlnum = 0; controlnum < cards_limit; controlnum++)
+ for (controlnum = 0; controlnum < cards_limit; controlnum++) {
devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
-#endif
+ simple_add_class_device(&sound_class, MKDEV(major, controlnum<<5), NULL, "controlC%d", controlnum);
+ }
#ifndef MODULE
printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n");
#endif
@@ -372,8 +376,10 @@ static void __exit alsa_sound_exit(void)
{
short controlnum;
- for (controlnum = 0; controlnum < cards_limit; controlnum++)
+ for (controlnum = 0; controlnum < cards_limit; controlnum++) {
devfs_remove("snd/controlC%d", controlnum);
+ simple_remove_class_device(MKDEV(major, controlnum<<5));
+ }
#ifdef CONFIG_SND_OSSEMUL
snd_info_minor_unregister();
diff -puN sound/pci/intel8x0.c~sysfs-add-alsa-class sound/pci/intel8x0.c
--- 25/sound/pci/intel8x0.c~sysfs-add-alsa-class Wed Jan 7 16:11:49 2004
+++ 25-akpm/sound/pci/intel8x0.c Wed Jan 7 16:11:49 2004
@@ -2589,6 +2589,7 @@ static int __devinit snd_intel8x0_probe(
break;
}
}
+ card->dev = &pci->dev;
if ((err = snd_intel8x0_create(card, pci, pci_id->driver_data, &chip)) < 0) {
snd_card_free(card);
_