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| author | Clemens Ladisch <clemens@ladisch.de> | 2005-11-20 14:07:47 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-01-03 12:29:19 +0100 |
| commit | 332682b1cd540dd7abbbbfc1905af8139e76e1b7 (patch) | |
| tree | e2e858870972073b2e01f7f8d5948c187c11e2bb /include/sound | |
| parent | f87135f56cb266e031f5ec081dfbde7e43f55e80 (diff) | |
| download | linux-332682b1cd540dd7abbbbfc1905af8139e76e1b7.tar.bz2 | |
[ALSA] dynamic minors (4/6): dynamic minor number allocation
Modules: ALSA Core,ALSA Minor Numbers
Add an option to allocate device file minor numbers dynamically.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/minors.h | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/include/sound/minors.h b/include/sound/minors.h index a17b5c9961bb..46bcd2023ed8 100644 --- a/include/sound/minors.h +++ b/include/sound/minors.h @@ -26,18 +26,20 @@ #define SNDRV_MINOR_DEVICE(minor) ((minor) & 0x001f) #define SNDRV_MINOR(card, dev) (((card) << 5) | (dev)) -#define SNDRV_MINOR_CONTROL 0 /* 0 - 0 */ +/* these minors can still be used for autoloading devices (/dev/aload*) */ +#define SNDRV_MINOR_CONTROL 0 /* 0 */ #define SNDRV_MINOR_GLOBAL 1 /* 1 */ #define SNDRV_MINOR_SEQUENCER (SNDRV_MINOR_GLOBAL + 0 * 32) #define SNDRV_MINOR_TIMER (SNDRV_MINOR_GLOBAL + 1 * 32) + +#ifndef CONFIG_SND_DYNAMIC_MINORS + /* 2 - 3 (reserved) */ #define SNDRV_MINOR_HWDEP 4 /* 4 - 7 */ -#define SNDRV_MINOR_HWDEPS 4 #define SNDRV_MINOR_RAWMIDI 8 /* 8 - 15 */ -#define SNDRV_MINOR_RAWMIDIS 8 #define SNDRV_MINOR_PCM_PLAYBACK 16 /* 16 - 23 */ #define SNDRV_MINOR_PCM_CAPTURE 24 /* 24 - 31 */ -#define SNDRV_MINOR_PCMS 8 +/* same as first respective minor number to make minor allocation easier */ #define SNDRV_DEVICE_TYPE_CONTROL SNDRV_MINOR_CONTROL #define SNDRV_DEVICE_TYPE_HWDEP SNDRV_MINOR_HWDEP #define SNDRV_DEVICE_TYPE_RAWMIDI SNDRV_MINOR_RAWMIDI @@ -46,6 +48,25 @@ #define SNDRV_DEVICE_TYPE_SEQUENCER SNDRV_MINOR_SEQUENCER #define SNDRV_DEVICE_TYPE_TIMER SNDRV_MINOR_TIMER +#else /* CONFIG_SND_DYNAMIC_MINORS */ + +enum { + SNDRV_DEVICE_TYPE_CONTROL, + SNDRV_DEVICE_TYPE_SEQUENCER, + SNDRV_DEVICE_TYPE_TIMER, + SNDRV_DEVICE_TYPE_HWDEP, + SNDRV_DEVICE_TYPE_RAWMIDI, + SNDRV_DEVICE_TYPE_PCM_PLAYBACK, + SNDRV_DEVICE_TYPE_PCM_CAPTURE, +}; + +#endif /* CONFIG_SND_DYNAMIC_MINORS */ + +#define SNDRV_MINOR_HWDEPS 4 +#define SNDRV_MINOR_RAWMIDIS 8 +#define SNDRV_MINOR_PCMS 8 + + #ifdef CONFIG_SND_OSSEMUL #define SNDRV_MINOR_OSS_DEVICES 16 |