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| author |   Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-03-22 21:30:25 +0900 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2017-03-28 12:34:06 +0200 |
| commit | 5aaab1bf37ede45df4f5d13d735faf824edf3ec8 (patch) | |
| tree | b1c358629796556f57cf52faf832d226b7b2338d /include/uapi/sound | |
| parent | ALSA: firewire-motu: add hwdep interface (diff) | |
| download | linux-dev-5aaab1bf37ede45df4f5d13d735faf824edf3ec8.tar.xz linux-dev-5aaab1bf37ede45df4f5d13d735faf824edf3ec8.zip | |
ALSA: firewire-motu: enable to read transaction cache via hwdep interface
MOTU FireWire series can transfer messages to registered address. These
messages are transferred for the status of internal clock synchronization
just after starting streams.
When the synchronization is stable, it's 0x01ffffff. Else, it's 0x05ffffff.
This commit adds a functionality for user space applications to receive
content of the message.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/uapi/sound')
| -rw-r--r-- | include/uapi/sound/firewire.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h index 59c6d81f5364..29afc5eab42d 100644 --- a/include/uapi/sound/firewire.h +++ b/include/uapi/sound/firewire.h @@ -10,6 +10,7 @@ #define SNDRV_FIREWIRE_EVENT_DICE_NOTIFICATION 0xd1ce004e #define SNDRV_FIREWIRE_EVENT_EFW_RESPONSE 0x4e617475 #define SNDRV_FIREWIRE_EVENT_DIGI00X_MESSAGE 0x746e736c +#define SNDRV_FIREWIRE_EVENT_MOTU_NOTIFICATION 0x64776479 struct snd_firewire_event_common { unsigned int type; /* SNDRV_FIREWIRE_EVENT_xxx */ @@ -46,12 +47,18 @@ struct snd_firewire_event_digi00x_message { __u32 message; /* Digi00x-specific message */ }; +struct snd_firewire_event_motu_notification { + unsigned int type; + __u32 message; /* MOTU-specific bits. */ +}; + union snd_firewire_event { struct snd_firewire_event_common common; struct snd_firewire_event_lock_status lock_status; struct snd_firewire_event_dice_notification dice_notification; struct snd_firewire_event_efw_response efw_response; struct snd_firewire_event_digi00x_message digi00x_message; + struct snd_firewire_event_motu_notification motu_notification; }; |