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WSL2-Linux-Kernel
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[PATCH] Assign device pointer to OSS devices 

Add register_sound_special_device() function to allow assignment of
device pointer to a specific OSS device for HAL.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-08-30 08:58:37 +02:00 коммит произвёл Jaroslav Kysela
Родитель 68c339d906
Коммит d568121ce3
3 изменённых файлов: 25 добавлений и 11 удалений
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2
include/linux/sound.h
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@ -29,7 +29,9 @@
* Sound core interface functions
*/
struct device;
extern int register_sound_special(struct file_operations *fops, int unit);
extern int register_sound_special_device(struct file_operations *fops, int unit, struct device *dev);
extern int register_sound_mixer(struct file_operations *fops, int dev);
extern int register_sound_midi(struct file_operations *fops, int dev);
extern int register_sound_dsp(struct file_operations *fops, int dev);

7
sound/core/sound_oss.c
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@ -98,6 +98,7 @@ int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t *
int cidx = SNDRV_MINOR_OSS_CARD(minor);
int track2 = -1;
int register1 = -1, register2 = -1;
struct device *carddev = NULL;
if (minor < 0)
return minor;
@ -121,11 +122,13 @@ int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t *
track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
break;
}
register1 = register_sound_special(reg->f_ops, minor);
if (card)
carddev = card->dev;
register1 = register_sound_special_device(reg->f_ops, minor, carddev);
if (register1 != minor)
goto __end;
if (track2 >= 0) {
register2 = register_sound_special(reg->f_ops, track2);
register2 = register_sound_special_device(reg->f_ops, track2, carddev);
if (register2 != track2)
goto __end;
}

27
sound/sound_core.c
Просмотреть файл

@ -153,7 +153,7 @@ static DEFINE_SPINLOCK(sound_loader_lock);
* list. Acquires locks as needed
*/
static int sound_insert_unit(struct sound_unit **list, struct file_operations *fops, int index, int low, int top, const char *name, umode_t mode)
static int sound_insert_unit(struct sound_unit **list, struct file_operations *fops, int index, int low, int top, const char *name, umode_t mode, struct device *dev)
{
struct sound_unit *s = kmalloc(sizeof(*s), GFP_KERNEL);
int r;
@ -175,7 +175,7 @@ static int sound_insert_unit(struct sound_unit **list, struct file_operations *f
devfs_mk_cdev(MKDEV(SOUND_MAJOR, s->unit_minor),
S_IFCHR | mode, s->name);
class_device_create(sound_class, MKDEV(SOUND_MAJOR, s->unit_minor),
NULL, s->name+6);
dev, s->name+6);
return r;
fail:
@ -227,16 +227,18 @@ static void sound_remove_unit(struct sound_unit **list, int unit)
static struct sound_unit *chains[SOUND_STEP];
/**
* register_sound_special - register a special sound node
* register_sound_special_device - register a special sound node
* @fops: File operations for the driver
* @unit: Unit number to allocate
* @dev: device pointer
*
* Allocate a special sound device by minor number from the sound
* subsystem. The allocated number is returned on succes. On failure
* a negative error code is returned.
*/
int register_sound_special(struct file_operations *fops, int unit)
int register_sound_special_device(struct file_operations *fops, int unit,
struct device *dev)
{
const int chain = unit % SOUND_STEP;
int max_unit = 128 + chain;
@ -294,9 +296,16 @@ int register_sound_special(struct file_operations *fops, int unit)
break;
}
return sound_insert_unit(&chains[chain], fops, -1, unit, max_unit,
name, S_IRUSR | S_IWUSR);
name, S_IRUSR | S_IWUSR, dev);
}
EXPORT_SYMBOL(register_sound_special_device);
int register_sound_special(struct file_operations *fops, int unit)
{
return register_sound_special_device(fops, unit, NULL);
}
EXPORT_SYMBOL(register_sound_special);
/**
@ -312,7 +321,7 @@ EXPORT_SYMBOL(register_sound_special);
int register_sound_mixer(struct file_operations *fops, int dev)
{
return sound_insert_unit(&chains[0], fops, dev, 0, 128,
"mixer", S_IRUSR | S_IWUSR);
"mixer", S_IRUSR | S_IWUSR, NULL);
}
EXPORT_SYMBOL(register_sound_mixer);
@ -330,7 +339,7 @@ EXPORT_SYMBOL(register_sound_mixer);
int register_sound_midi(struct file_operations *fops, int dev)
{
return sound_insert_unit(&chains[2], fops, dev, 2, 130,
"midi", S_IRUSR | S_IWUSR);
"midi", S_IRUSR | S_IWUSR, NULL);
}
EXPORT_SYMBOL(register_sound_midi);
@ -356,7 +365,7 @@ EXPORT_SYMBOL(register_sound_midi);
int register_sound_dsp(struct file_operations *fops, int dev)
{
return sound_insert_unit(&chains[3], fops, dev, 3, 131,
"dsp", S_IWUSR | S_IRUSR);
"dsp", S_IWUSR | S_IRUSR, NULL);
}
EXPORT_SYMBOL(register_sound_dsp);
@ -375,7 +384,7 @@ EXPORT_SYMBOL(register_sound_dsp);
int register_sound_synth(struct file_operations *fops, int dev)
{
return sound_insert_unit(&chains[9], fops, dev, 9, 137,
"synth", S_IRUSR | S_IWUSR);
"synth", S_IRUSR | S_IWUSR, NULL);
}
EXPORT_SYMBOL(register_sound_synth);