sound: oxygen: add digital filter control

[safe/jmp/linux-2.6] / sound / pci / oxygen / oxygen.c

diff --git a/sound/pci/oxygen/oxygen.c b/sound/pci/oxygen/oxygen.c
index d12fd9e..3ad9eb0 100644 (file)
--- a/sound/pci/oxygen/oxygen.c
+++ b/sound/pci/oxygen/oxygen.c
@@ -352,6 +352,70 @@ static void set_ak5385_params(struct oxygen *chip,
                              value, GPIO_AK5385_DFS_MASK);
 }
 
+static int rolloff_info(struct snd_kcontrol *ctl,
+                       struct snd_ctl_elem_info *info)
+{
+       static const char *const names[2] = {
+               "Sharp Roll-off", "Slow Roll-off"
+       };
+
+       info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+       info->count = 1;
+       info->value.enumerated.items = 2;
+       if (info->value.enumerated.item >= 2)
+               info->value.enumerated.item = 1;
+       strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
+       return 0;
+}
+
+static int rolloff_get(struct snd_kcontrol *ctl,
+                      struct snd_ctl_elem_value *value)
+{
+       struct oxygen *chip = ctl->private_data;
+       struct generic_data *data = chip->model_data;
+
+       value->value.enumerated.item[0] =
+               (data->ak4396_regs[0][AK4396_CONTROL_2] & AK4396_SLOW) != 0;
+       return 0;
+}
+
+static int rolloff_put(struct snd_kcontrol *ctl,
+                      struct snd_ctl_elem_value *value)
+{
+       struct oxygen *chip = ctl->private_data;
+       struct generic_data *data = chip->model_data;
+       unsigned int i;
+       int changed;
+       u8 reg;
+
+       mutex_lock(&chip->mutex);
+       reg = data->ak4396_regs[0][AK4396_CONTROL_2];
+       if (value->value.enumerated.item[0])
+               reg |= AK4396_SLOW;
+       else
+               reg &= ~AK4396_SLOW;
+       changed = reg != data->ak4396_regs[0][AK4396_CONTROL_2];
+       if (changed) {
+               for (i = 0; i < 4; ++i)
+                       ak4396_write(chip, i, AK4396_CONTROL_2, reg);
+       }
+       mutex_unlock(&chip->mutex);
+       return changed;
+}
+
+static const struct snd_kcontrol_new rolloff_control = {
+       .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+       .name = "DAC Filter Playback Enum",
+       .info = rolloff_info,
+       .get = rolloff_get,
+       .put = rolloff_put,
+};
+
+static int generic_mixer_init(struct oxygen *chip)
+{
+       return snd_ctl_add(chip->card, snd_ctl_new1(&rolloff_control, chip));
+}
+
 static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);
 
 static const struct oxygen_model model_generic = {
@@ -359,6 +423,7 @@ static const struct oxygen_model model_generic = {
        .longname = "C-Media Oxygen HD Audio",
        .chip = "CMI8788",
        .init = generic_init,
+       .mixer_init = generic_mixer_init,
        .cleanup = generic_cleanup,
        .resume = generic_resume,
        .get_i2s_mclk = oxygen_default_i2s_mclk,