[ALSA] oxygen: add monitor controls

Add controls to enable monitoring of the analog and digital inputs.

To allow monitoring after loading the driver when nothing has been
played back or recorded yet, the I2S input and outputs are initialized
to a valid configuration.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 156 insertions, 0 deletions

diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index a8e4623415d9..4e77b79b3b6e 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -446,6 +446,50 @@ static int spdif_loopback_put(struct snd_kcontrol *ctl,
         return changed;
 }
 
+static int monitor_volume_info(struct snd_kcontrol *ctl,
+                               struct snd_ctl_elem_info *info)
+{
+        info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        info->count = 1;
+        info->value.integer.min = 0;
+        info->value.integer.max = 1;
+        return 0;
+}
+
+static int monitor_get(struct snd_kcontrol *ctl,
+                       struct snd_ctl_elem_value *value)
+{
+        struct oxygen *chip = ctl->private_data;
+        u8 bit = ctl->private_value;
+        int invert = ctl->private_value & (1 << 8);
+
+        value->value.integer.value[0] =
+                !!invert ^ !!(oxygen_read8(chip, OXYGEN_ADC_MONITOR) & bit);
+        return 0;
+}
+
+static int monitor_put(struct snd_kcontrol *ctl,
+                       struct snd_ctl_elem_value *value)
+{
+        struct oxygen *chip = ctl->private_data;
+        u8 bit = ctl->private_value;
+        int invert = ctl->private_value & (1 << 8);
+        u8 oldreg, newreg;
+        int changed;
+
+        spin_lock_irq(&chip->reg_lock);
+        oldreg = oxygen_read8(chip, OXYGEN_ADC_MONITOR);
+        if ((!!value->value.integer.value[0] ^ !!invert) != 0)
+                newreg = oldreg | bit;
+        else
+                newreg = oldreg & ~bit;
+        changed = newreg != oldreg;
+        if (changed)
+                oxygen_write8(chip, OXYGEN_ADC_MONITOR, newreg);
+        spin_unlock_irq(&chip->reg_lock);
+        return changed;
+}
+
 static int ac97_switch_get(struct snd_kcontrol *ctl,
                            struct snd_ctl_elem_value *value)
 {
@@ -608,6 +652,7 @@ static int ac97_fp_rec_volume_put(struct snd_kcontrol *ctl,
                 .private_value = ((codec) << 24) | (index), \
         }
 
+static DECLARE_TLV_DB_SCALE(monitor_db_scale, -1000, 1000, 0);
 static DECLARE_TLV_DB_SCALE(ac97_db_scale, -3450, 150, 0);
 static DECLARE_TLV_DB_SCALE(ac97_rec_db_scale, 0, 150, 0);
 
@@ -692,6 +737,93 @@ static const struct snd_kcontrol_new controls[] = {
         },
 };
 
+static const struct snd_kcontrol_new monitor_a_controls[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Switch",
+                .info = snd_ctl_boolean_mono_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_A,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Volume",
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                          SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+                .info = monitor_volume_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_A_HALF_VOL | (1 << 8),
+                .tlv = { .p = monitor_db_scale, },
+        },
+};
+static const struct snd_kcontrol_new monitor_b_controls[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Switch",
+                .info = snd_ctl_boolean_mono_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_B,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Volume",
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                          SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+                .info = monitor_volume_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_B_HALF_VOL | (1 << 8),
+                .tlv = { .p = monitor_db_scale, },
+        },
+};
+static const struct snd_kcontrol_new monitor_2nd_b_controls[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Switch",
+                .index = 1,
+                .info = snd_ctl_boolean_mono_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_B,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Analog Input Monitor Volume",
+                .index = 1,
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                          SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+                .info = monitor_volume_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_B_HALF_VOL | (1 << 8),
+                .tlv = { .p = monitor_db_scale, },
+        },
+};
+static const struct snd_kcontrol_new monitor_c_controls[] = {
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Digital Input Monitor Switch",
+                .info = snd_ctl_boolean_mono_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_C,
+        },
+        {
+                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .name = "Digital Input Monitor Volume",
+                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                          SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+                .info = monitor_volume_info,
+                .get = monitor_get,
+                .put = monitor_put,
+                .private_value = OXYGEN_ADC_MONITOR_C_HALF_VOL | (1 << 8),
+                .tlv = { .p = monitor_db_scale, },
+        },
+};
+
 static const struct snd_kcontrol_new ac97_controls[] = {
         AC97_VOLUME("Mic Capture Volume", 0, AC97_MIC),
         AC97_SWITCH("Mic Capture Switch", 0, AC97_MIC, 15, 1),
@@ -778,6 +910,30 @@ int oxygen_mixer_init(struct oxygen *chip)
         err = add_controls(chip, controls, ARRAY_SIZE(controls));
         if (err < 0)
                 return err;
+        if (chip->model->used_channels & OXYGEN_CHANNEL_A) {
+                err = add_controls(chip, monitor_a_controls,
+                                   ARRAY_SIZE(monitor_a_controls));
+                if (err < 0)
+                        return err;
+        } else if (chip->model->used_channels & OXYGEN_CHANNEL_B) {
+                err = add_controls(chip, monitor_b_controls,
+                                   ARRAY_SIZE(monitor_b_controls));
+                if (err < 0)
+                        return err;
+        }
+        if ((chip->model->used_channels & (OXYGEN_CHANNEL_A | OXYGEN_CHANNEL_B))
+            == (OXYGEN_CHANNEL_A | OXYGEN_CHANNEL_B)) {
+                err = add_controls(chip, monitor_2nd_b_controls,
+                                   ARRAY_SIZE(monitor_2nd_b_controls));
+                if (err < 0)
+                        return err;
+        }
+        if (chip->model->used_channels & OXYGEN_CHANNEL_C) {
+                err = add_controls(chip, monitor_c_controls,
+                                   ARRAY_SIZE(monitor_c_controls));
+                if (err < 0)
+                        return err;
+        }
         if (chip->has_ac97_0) {
                 err = add_controls(chip, ac97_controls,
                                    ARRAY_SIZE(ac97_controls));