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path: root/drivers/usb/gadget/function/u_audio.h
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Diffstat (limited to 'drivers/usb/gadget/function/u_audio.h')
-rw-r--r--drivers/usb/gadget/function/u_audio.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_audio.h b/drivers/usb/gadget/function/u_audio.h
index a218cdf771fe..001a79a46022 100644
--- a/drivers/usb/gadget/function/u_audio.h
+++ b/drivers/usb/gadget/function/u_audio.h
@@ -19,16 +19,30 @@
*/
#define FBACK_SLOW_MAX 250
+/* Feature Unit parameters */
+struct uac_fu_params {
+ int id; /* Feature Unit ID */
+
+ bool mute_present; /* mute control enable */
+
+ bool volume_present; /* volume control enable */
+ s16 volume_min; /* min volume in 1/256 dB */
+ s16 volume_max; /* max volume in 1/256 dB */
+ s16 volume_res; /* volume resolution in 1/256 dB */
+};
+
struct uac_params {
/* playback */
int p_chmask; /* channel mask */
int p_srate; /* rate in Hz */
int p_ssize; /* sample size */
+ struct uac_fu_params p_fu; /* Feature Unit parameters */
/* capture */
int c_chmask; /* channel mask */
int c_srate; /* rate in Hz */
int c_ssize; /* sample size */
+ struct uac_fu_params c_fu; /* Feature Unit parameters */
int req_number; /* number of preallocated requests */
int fb_max; /* upper frequency drift feedback limit per-mil */
@@ -49,6 +63,9 @@ struct g_audio {
/* Max packet size for all out_ep possible speeds */
unsigned int out_ep_maxpsize;
+ /* Notify UAC driver about control change */
+ int (*notify)(struct g_audio *g_audio, int unit_id, int cs);
+
/* The ALSA Sound Card it represents on the USB-Client side */
struct snd_uac_chip *uac;
@@ -94,4 +111,9 @@ void u_audio_stop_capture(struct g_audio *g_audio);
int u_audio_start_playback(struct g_audio *g_audio);
void u_audio_stop_playback(struct g_audio *g_audio);
+int u_audio_get_volume(struct g_audio *g_audio, int playback, s16 *val);
+int u_audio_set_volume(struct g_audio *g_audio, int playback, s16 val);
+int u_audio_get_mute(struct g_audio *g_audio, int playback, int *val);
+int u_audio_set_mute(struct g_audio *g_audio, int playback, int val);
+
#endif /* __U_AUDIO_H */