diff options
| author | Mike Lockwood <lockwood@google.com> | 2012-05-11 09:00:40 -0700 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 14:16:06 -0700 |
| commit | 9465534ef10e9501b4783df2fe7e1fb0433a694d (patch) | |
| tree | 30c126228f329550a8d0aa4b9d005e0a71f16f8f /include | |
| parent | cef82c16097744576bdd2bb5c409ea57d6229f0d (diff) | |
USB: gadget: Add ACCESSORY_SET_AUDIO_MODE control request and ioctl
The control request will be used by the host to enable/disable USB audio
and the ioctl will be used by userspace to read the audio mode
Change-Id: I81c38611b588451e80eacdccc417ca6e11c60cab
Signed-off-by: Mike Lockwood <lockwood@google.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/f_accessory.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/linux/usb/f_accessory.h b/include/linux/usb/f_accessory.h index 5b2dcf9728e..ddb2fd0e88f 100644 --- a/include/linux/usb/f_accessory.h +++ b/include/linux/usb/f_accessory.h @@ -36,13 +36,15 @@ #define ACCESSORY_STRING_URI 4 #define ACCESSORY_STRING_SERIAL 5 -/* Control request for retrieving device's protocol version (currently 1) +/* Control request for retrieving device's protocol version * * requestType: USB_DIR_IN | USB_TYPE_VENDOR * request: ACCESSORY_GET_PROTOCOL * value: 0 * index: 0 * data version number (16 bits little endian) + * 1 for original accessory support + * 2 adds device to host audio support */ #define ACCESSORY_GET_PROTOCOL 51 @@ -70,6 +72,17 @@ */ #define ACCESSORY_START 53 +/* Control request for setting the audio mode. + * + * requestType: USB_DIR_OUT | USB_TYPE_VENDOR + * request: ACCESSORY_SET_AUDIO_MODE + * value: 0 - no audio + * 1 - device to host, 44100 16-bit stereo PCM + * index: 0 + * data none + */ +#define ACCESSORY_SET_AUDIO_MODE 58 + /* ioctls for retrieving strings set by the host */ #define ACCESSORY_GET_STRING_MANUFACTURER _IOW('M', 1, char[256]) #define ACCESSORY_GET_STRING_MODEL _IOW('M', 2, char[256]) @@ -79,5 +92,7 @@ #define ACCESSORY_GET_STRING_SERIAL _IOW('M', 6, char[256]) /* returns 1 if there is a start request pending */ #define ACCESSORY_IS_START_REQUESTED _IO('M', 7) +/* returns audio mode (set via the ACCESSORY_SET_AUDIO_MODE control request) */ +#define ACCESSORY_GET_AUDIO_MODE _IO('M', 8) #endif /* __LINUX_USB_F_ACCESSORY_H */ |