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authorMark Hills <mark@pogo.org.uk>2012-04-14 20:19:24 +0400
committerTakashi Iwai <tiwai@suse.de>2012-04-15 17:40:08 +0400
commit7536c301f8817214629e80fa06b5b5c93df3ad52 (patch)
tree6970ff8802640e41ed82b5fc8729b605c405415d /sound/usb/mixer_quirks.c
parent284a8dd6f0fb16029198b5b34437499d504b567c (diff)
downloadlinux-7536c301f8817214629e80fa06b5b5c93df3ad52.tar.xz
ALSA: snd-usb-audio: Replace mixer for Electrix Ebox-44
The mixer units from the firmware are corrupt, and even where they are valid they presents mono controls as L and R channels of stereo. Signed-off-by: Mark Hills <mark@pogo.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/mixer_quirks.c')
-rw-r--r--sound/usb/mixer_quirks.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index ab125ee0b0f0..e2072edc7772 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -557,6 +557,69 @@ static int snd_maudio_ftu_create_mixer(struct usb_mixer_interface *mixer)
return 0;
}
+static int snd_ebox44_create_ctl(struct usb_mixer_interface *mixer,
+ int unitid, int control, int cmask,
+ int val_type, const char *name)
+{
+ struct usb_mixer_elem_info *cval;
+ struct snd_kcontrol *kctl;
+
+ cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+ if (!cval)
+ return -ENOMEM;
+
+ cval->id = unitid;
+ cval->mixer = mixer;
+
+ cval->val_type = val_type;
+ cval->channels = 1;
+ cval->control = control;
+ cval->cmask = cmask;
+
+ /* Volume controls will override these values */
+ cval->min = 0;
+ cval->max = 1;
+ cval->res = 0;
+
+ cval->dBmin = 0;
+ cval->dBmax = 0;
+
+ kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
+ if (!kctl) {
+ kfree(cval);
+ return -ENOMEM;
+ }
+
+ snprintf(kctl->id.name, sizeof(kctl->id.name), name);
+ kctl->private_free = usb_mixer_elem_free;
+ return snd_usb_mixer_add_control(mixer, kctl);
+}
+
+/*
+ * Create mixer for Electrix Ebox-44
+ *
+ * The mixer units from this device are corrupt, and even where they
+ * are valid they presents mono controls as L and R channels of
+ * stereo. So we create a good mixer in code.
+ */
+
+static int snd_ebox44_create_mixer(struct usb_mixer_interface *mixer)
+{
+ snd_ebox44_create_ctl(mixer, 4, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Headphone Playback Switch");
+ snd_ebox44_create_ctl(mixer, 4, 2, 0x1, USB_MIXER_S16, "Headphone A Mix Playback Volume");
+ snd_ebox44_create_ctl(mixer, 4, 2, 0x2, USB_MIXER_S16, "Headphone B Mix Playback Volume");
+
+ snd_ebox44_create_ctl(mixer, 7, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Output Playback Switch");
+ snd_ebox44_create_ctl(mixer, 7, 2, 0x1, USB_MIXER_S16, "Output A Playback Volume");
+ snd_ebox44_create_ctl(mixer, 7, 2, 0x2, USB_MIXER_S16, "Output B Playback Volume");
+
+ snd_ebox44_create_ctl(mixer, 10, 1, 0x0, USB_MIXER_INV_BOOLEAN, "Input Capture Switch");
+ snd_ebox44_create_ctl(mixer, 10, 2, 0x1, USB_MIXER_S16, "Input A Capture Volume");
+ snd_ebox44_create_ctl(mixer, 10, 2, 0x2, USB_MIXER_S16, "Input B Capture Volume");
+
+ return 0;
+}
+
void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
unsigned char samplerate_id)
{
@@ -619,6 +682,10 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
snd_nativeinstruments_ta10_mixers,
ARRAY_SIZE(snd_nativeinstruments_ta10_mixers));
break;
+
+ case USB_ID(0x200c, 0x1018): /* Electrix Ebox-44 */
+ err = snd_ebox44_create_mixer(mixer);
+ break;
}
return err;