[ALSA] oxygen: make line-in switch exclusive

The line input cannot be mixed with the other inputs, so we have to mute
the other input switches when it is selected.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

2 files changed, 33 insertions, 1 deletions

diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index a10c37788059..4a0c6634ac96 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -18,6 +18,10 @@
 enum {
         CONTROL_SPDIF_PCM,
         CONTROL_SPDIF_INPUT_BITS,
+        CONTROL_MIC_CAPTURE_SWITCH,
+        CONTROL_LINE_CAPTURE_SWITCH,
+        CONTROL_CD_CAPTURE_SWITCH,
+        CONTROL_AUX_CAPTURE_SWITCH,
         CONTROL_COUNT
 };
 
diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index f7350faada1a..fcb5813183fb 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -402,6 +402,19 @@ static int ac97_switch_get(struct snd_kcontrol *ctl,
         return 0;
 }
 
+static void ac97_mute_ctl(struct oxygen *chip, unsigned int control)
+{
+        unsigned int index = chip->controls[control]->private_value & 0xff;
+        u16 value;
+
+        value = oxygen_read_ac97(chip, 0, index);
+        if (!(value & 0x8000)) {
+                oxygen_write_ac97(chip, 0, index, value | 0x8000);
+                snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+                               &chip->controls[control]->id);
+        }
+}
+
 static int ac97_switch_put(struct snd_kcontrol *ctl,
                            struct snd_ctl_elem_value *value)
 {
@@ -422,9 +435,20 @@ static int ac97_switch_put(struct snd_kcontrol *ctl,
         change = newreg != oldreg;
         if (change) {
                 oxygen_write_ac97(chip, 0, index, newreg);
-                if (index == AC97_LINE)
+                if (index == AC97_LINE) {
                         oxygen_write_ac97_masked(chip, 0, 0x72,
                                                  !!(newreg & 0x8000), 0x0001);
+                        if (!(newreg & 0x8000)) {
+                                ac97_mute_ctl(chip, CONTROL_MIC_CAPTURE_SWITCH);
+                                ac97_mute_ctl(chip, CONTROL_CD_CAPTURE_SWITCH);
+                                ac97_mute_ctl(chip, CONTROL_AUX_CAPTURE_SWITCH);
+                        }
+                } else if ((index == AC97_MIC || index == AC97_CD ||
+                            index == AC97_VIDEO || index == AC97_AUX) &&
+                           bitnr == 15 && !(newreg & 0x8000)) {
+                        ac97_mute_ctl(chip, CONTROL_LINE_CAPTURE_SWITCH);
+                        oxygen_write_ac97_masked(chip, 0, 0x72, 0x0001, 0x0001);
+                }
         }
         mutex_unlock(&chip->mutex);
         return change;
@@ -600,6 +624,10 @@ int oxygen_mixer_init(struct oxygen *chip)
                         SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
                 [CONTROL_SPDIF_INPUT_BITS] =
                         SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
+                [CONTROL_MIC_CAPTURE_SWITCH] = "Mic Capture Switch",
+                [CONTROL_LINE_CAPTURE_SWITCH] = "Line Capture Switch",
+                [CONTROL_CD_CAPTURE_SWITCH] = "CD Capture Switch",
+                [CONTROL_AUX_CAPTURE_SWITCH] = "Aux Capture Switch",
         };
         unsigned int i, j;
         struct snd_kcontrol *ctl;