ALSA: usb-audio: Fast Track C400 mixer ranges

Add ranges for various Fast Track C400 controls, as observed
while using the vendor's mixer control software (res values
are an estimation).

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 27 insertions, 0 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 4eacbe2e2d64..feed500f9435 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -806,6 +806,33 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval,
                                   struct snd_kcontrol *kctl)
 {
         switch (cval->mixer->chip->usb_id) {
+        case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+                if (strcmp(kctl->id.name, "Effect Duration") == 0) {
+                        cval->min = 0x0000;
+                        cval->max = 0xffff;
+                        cval->res = 0x00e6;
+                        break;
+                }
+                if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
+                    strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
+                        cval->min = 0x00;
+                        cval->max = 0xff;
+                        break;
+                }
+                if (strstr(kctl->id.name, "Effect Return") != NULL) {
+                        cval->min = 0xb706;
+                        cval->max = 0xff7b;
+                        cval->res = 0x0073;
+                        break;
+                }
+                if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
+                        (strstr(kctl->id.name, "Effect Send") != NULL)) {
+                        cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
+                        cval->max = 0xfcfe;
+                        cval->res = 0x0073;
+                }
+                break;
+
         case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
         case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
                 if (strcmp(kctl->id.name, "Effect Duration") == 0) {