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| author | Clemens Ladisch <clemens@ladisch.de> | 2011-03-15 09:53:21 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-03-15 10:42:22 +0300 |
| commit | 31ef9134eb52636d383a7d0626cbbd345cb94f2f (patch) | |
| tree | 5d994932a8773e844190cbea43ef31d67f605cf8 /sound/firewire/lib.h | |
| parent | a5abba989deceb731047425812d268daf7536575 (diff) | |
| download | linux-31ef9134eb52636d383a7d0626cbbd345cb94f2f.tar.xz | |
ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver
Add a driver for two playback-only FireWire devices based on the OXFW970
chip.
v2: better AMDTP API abstraction; fix fw_unit leak; small fixes
v3: cache the iPCR value
v4: FireWave constraints; fix fw_device reference counting;
fix PCR caching; small changes and fixes
v5: volume/mute support; fix crashing due to pcm stop races
v6: fix build; one-channel volume for LaCie
v7: use signed values to make volume (range checks) work; fix function
block IDs for volume/mute; always use channel 0 for LaCie volume
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Jay Fenlason <fenlason@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/lib.h')
| -rw-r--r-- | sound/firewire/lib.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sound/firewire/lib.h b/sound/firewire/lib.h new file mode 100644 index 000000000000..064f3fd9ab06 --- /dev/null +++ b/sound/firewire/lib.h @@ -0,0 +1,19 @@ +#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED +#define SOUND_FIREWIRE_LIB_H_INCLUDED + +#include <linux/firewire-constants.h> +#include <linux/types.h> + +struct fw_unit; + +int snd_fw_transaction(struct fw_unit *unit, int tcode, + u64 offset, void *buffer, size_t length); +const char *rcode_string(unsigned int rcode); + +/* returns true if retrying the transaction would not make sense */ +static inline bool rcode_is_permanent_error(int rcode) +{ + return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR; +} + +#endif |