[media] em28xx-audio: add support for mute controls
Mauro Carvalho Chehab [Sun, 19 Jun 2011 16:08:46 +0000 (13:08 -0300)]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/em28xx/em28xx-audio.c

index a75c779..c7b96b4 100644 (file)
@@ -448,8 +448,6 @@ static int em28xx_vol_info(struct snd_kcontrol *kcontrol,
        return 0;
 }
 
-/* FIXME: should also add mute controls for each */
-
 static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *value)
 {
@@ -463,7 +461,7 @@ static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
        if (rc < 0)
                goto err;
 
-       val |= rc & 0x8080;     /* Preserve the mute flags */
+       val |= rc & 0x8000;     /* Preserve the mute flag */
 
        rc = em28xx_write_ac97(dev, kcontrol->private_value, val);
 
@@ -490,25 +488,87 @@ static int em28xx_vol_get(struct snd_kcontrol *kcontrol,
        return 0;
 }
 
+static int em28xx_vol_put_mute(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_value *value)
+{
+       struct em28xx *dev = snd_kcontrol_chip(kcontrol);
+       u16 val = value->value.integer.value[0];
+       int rc;
+
+       mutex_lock(&dev->lock);
+       rc = em28xx_read_ac97(dev, kcontrol->private_value);
+       if (rc < 0)
+               goto err;
+
+       if (val)
+               rc |= 0x8000;
+       else
+               rc &= 0x7f7f;
+
+       rc = em28xx_write_ac97(dev, kcontrol->private_value, rc);
+
+err:
+       mutex_unlock(&dev->lock);
+       return rc;
+}
+
+static int em28xx_vol_get_mute(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_value *value)
+{
+       struct em28xx *dev = snd_kcontrol_chip(kcontrol);
+       int val;
+
+       mutex_lock(&dev->lock);
+       val = em28xx_read_ac97(dev, kcontrol->private_value);
+       mutex_unlock(&dev->lock);
+       if (val < 0)
+               return val;
+
+       if (val & 0x8000)
+               value->value.integer.value[0] = 1;
+       else
+               value->value.integer.value[0] = 0;
+
+       return 0;
+}
+
 static const DECLARE_TLV_DB_SCALE(em28xx_db_scale, -3450, 150, 0);
 
 static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev,
                           char *name, int id)
 {
        int err;
+       char ctl_name[44];
        struct snd_kcontrol *kctl;
-       struct snd_kcontrol_new tmp = {
-               .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-               .name  = name,
-               .info  = em28xx_vol_info,
-               .get   = em28xx_vol_get,
-               .put   = em28xx_vol_put,
-               .private_value = id,
-               .tlv.p = em28xx_db_scale,
-       };
-
+       struct snd_kcontrol_new tmp;
+
+       memset (&tmp, 0, sizeof(tmp));
+       tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+       tmp.private_value = id,
+       tmp.name  = ctl_name,
+
+       /* Add Mute Control */
+       sprintf(ctl_name, "%s Switch", name);
+       tmp.get  = em28xx_vol_get_mute;
+       tmp.put  = em28xx_vol_put_mute;
+       tmp.info = snd_ctl_boolean_mono_info;
        kctl = snd_ctl_new1(&tmp, dev);
+       err = snd_ctl_add(card, kctl);
+       if (err < 0)
+               return err;
 
+       memset (&tmp, 0, sizeof(tmp));
+       tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+       tmp.private_value = id,
+       tmp.name  = ctl_name,
+
+       /* Add Volume Control */
+       sprintf(ctl_name, "%s Volume", name);
+       tmp.get   = em28xx_vol_get;
+       tmp.put   = em28xx_vol_put;
+       tmp.info  = em28xx_vol_info;
+       tmp.tlv.p = em28xx_db_scale,
+       kctl = snd_ctl_new1(&tmp, dev);
        err = snd_ctl_add(card, kctl);
        if (err < 0)
                return err;
@@ -516,7 +576,6 @@ static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev,
        return 0;
 }
 
-
 /*
  * register/unregister code and data
  */