This commit adds a new event of knob control specific to RME Fireface 400.
Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
include/uapi/sound/firewire.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h
index 3532ac7046d7..50917581dd2b 100644
--- a/include/uapi/sound/firewire.h
+++ b/include/uapi/sound/firewire.h
@@ -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;
};
--
2.37.2
