[alsa-devel] [FT C400, RFC 4/6] usb-audio: Fast Track C400 mixer ranges

[Eldad Zack]

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 at fogrefinery.com>
---
 sound/usb/mixer.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 9bbc981..5cddc0b 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -800,6 +800,42 @@ 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) {
+			snd_printk(KERN_INFO
+				"usb-audio: set quirk for C400 Effect Duration\n");
+			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) {
+			snd_printk(KERN_INFO
+				"usb-audio: set quirks for C400 Effect Feedback/Volume\n");
+			cval->min = 0x00;
+			cval->max = 0xff;
+			break;
+		}
+		if (strstr(kctl->id.name, "Effect Return") != NULL) {
+			snd_printk(KERN_INFO
+				"usb-audio: set quirks for C400 %s\n", kctl->id.name);
+			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)) {
+			snd_printk(KERN_INFO
+				"usb-audio: set quirk for Fast Track C400 %s\n",
+				kctl->id.name);
+			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) {
-- 
1.7.8.6