From 90e8ac5c9d446124a5b43a6f135bf67e060c0c9d Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Fri, 23 Nov 2018 13:13:04 +0900 Subject: ALSA: firewire-tascam: add new hwdep ioctl command to get state image In a previous commit, ALSA firewire-tascam driver stores state image from tx isochronous packets. This image includes states of knob, fader, button of control surface, level of gain/volume of each physical inputs/outputs, and so on. It's useful for userspace applications to read whole of the image. This commit adds a unique ioctl command for ALSA hwdep interface for the purpose. For actual meaning of each bits in this image, please refer to discussion in alsa-devel[1]. [1] http://mailman.alsa-project.org/pipermail/alsa-devel/2018-October/140785.html Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- include/uapi/sound/firewire.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h index b9bc4bb1756b..012f81bf4750 100644 --- a/include/uapi/sound/firewire.h +++ b/include/uapi/sound/firewire.h @@ -66,6 +66,7 @@ union snd_firewire_event { #define SNDRV_FIREWIRE_IOCTL_GET_INFO _IOR('H', 0xf8, struct snd_firewire_get_info) #define SNDRV_FIREWIRE_IOCTL_LOCK _IO('H', 0xf9) #define SNDRV_FIREWIRE_IOCTL_UNLOCK _IO('H', 0xfa) +#define SNDRV_FIREWIRE_IOCTL_TASCAM_STATE _IOR('H', 0xfb, struct snd_firewire_tascam_state) #define SNDRV_FIREWIRE_TYPE_DICE 1 #define SNDRV_FIREWIRE_TYPE_FIREWORKS 2 @@ -90,4 +91,8 @@ struct snd_firewire_get_info { #define SNDRV_FIREWIRE_TASCAM_STATE_COUNT 64 +struct snd_firewire_tascam_state { + __be32 data[SNDRV_FIREWIRE_TASCAM_STATE_COUNT]; +}; + #endif /* _UAPI_SOUND_FIREWIRE_H_INCLUDED */ -- cgit v1.3-18-gd494