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ALSA: fireface: update UAPI for data of knob control

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This commit adds a new event of knob control specific to RME Fireface 400.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20230112120954.500692-5-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2023-01-12 21:09:52 +09:00 • committed by Takashi Iwai
parent aed713bfae
commit ab811cfffa
1 changed files with 24 additions and 0 deletions
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24
include/uapi/sound/firewire.h
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@ -14,6 +14,7 @@
#define SNDRV_FIREWIRE_EVENT_MOTU_NOTIFICATION 0x64776479
#define SNDRV_FIREWIRE_EVENT_TASCAM_CONTROL 0x7473636d
#define SNDRV_FIREWIRE_EVENT_MOTU_REGISTER_DSP_CHANGE 0x4d545244
#define SNDRV_FIREWIRE_EVENT_FF400_MESSAGE 0x4f6c6761
struct snd_firewire_event_common {
unsigned int type; /* SNDRV_FIREWIRE_EVENT_xxx */
@ -72,6 +73,28 @@ struct snd_firewire_event_motu_register_dsp_change {
__u32 changes[]; /* Encoded event for change of register DSP. */
};
/**
* struct snd_firewire_event_ff400_message - the container for message from Fireface 400 when
* operating hardware knob.
*
* @type: Fixed to SNDRV_FIREWIRE_EVENT_FF400_MESSAGE.
* @messages.message: The messages expressing hardware knob operation.
* @messages.tstamp: The isochronous cycle at which the request subaction of asynchronous
* transaction was sent to deliver the message. It has 16 bit unsigned integer
* value. The higher 3 bits of value expresses the lower three bits of second
* field in the format of CYCLE_TIME, up to 7. The rest 13 bits expresses cycle
* field up to 7999.
*
* The structure expresses message transmitted by Fireface 400 when operating hardware knob.
*/
struct snd_firewire_event_ff400_message {
unsigned int type;
struct {
__u32 message;
__u32 tstamp;
} messages[];
};
union snd_firewire_event {
struct snd_firewire_event_common common;
struct snd_firewire_event_lock_status lock_status;
@ -81,6 +104,7 @@ union snd_firewire_event {
struct snd_firewire_event_tascam_control tascam_control;
struct snd_firewire_event_motu_notification motu_notification;
struct snd_firewire_event_motu_register_dsp_change motu_register_dsp_change;
struct snd_firewire_event_ff400_message ff400_message;
};