From 31ef9134eb52636d383a7d0626cbbd345cb94f2f Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Tue, 15 Mar 2011 07:53:21 +0100 Subject: 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 Acked-by: Stefan Richter Tested-by: Jay Fenlason Signed-off-by: Takashi Iwai --- sound/firewire/lib.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 sound/firewire/lib.h (limited to 'sound/firewire/lib.h') 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 +#include + +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 -- cgit v1.2.3