static int fwspk_volume_put(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct fwspk *fwspk = control->private_data;
unsigned int i, changed_channels;
bool equal_values = true;
s16 volume;
int err;
for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
if (value->value.integer.value[i] < fwspk->volume_min ||
value->value.integer.value[i] > fwspk->volume_max)
return -EINVAL;
if (value->value.integer.value[i] !=
value->value.integer.value[0])
equal_values = false;
}
changed_channels = 0;
for (i = 0; i < fwspk->device_info->mixer_channels; ++i)
if (value->value.integer.value[channel_map[i]] !=
fwspk->volume[i])
changed_channels |= 1 << (i + 1);
if (equal_values && changed_channels != 0)
changed_channels = 1 << 0;
for (i = 0; i <= fwspk->device_info->mixer_channels; ++i) {
volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
if (changed_channels & (1 << i)) {
err = fwspk_volume_command(fwspk, &volume, i,
CTL_CURRENT, CTL_WRITE);
if (err < 0)
return err;
}
if (i > 0)
fwspk->volume[i - 1] = volume;
}
return changed_channels != 0;
}
.info = snd_ctl_boolean_mono_info,
.get = fwspk_mute_get,
.put = fwspk_mute_put,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Playback Volume",
.info = fwspk_volume_info,
.get = fwspk_volume_get,
.put = fwspk_volume_put,
},
};
unsigned int i, first_ch;
int err;
err = fwspk_volume_command(fwspk, &fwspk->volume_min,
0, CTL_MIN, CTL_READ);
if (err < 0)
return err;
err = fwspk_volume_command(fwspk, &fwspk->volume_max,
0, CTL_MAX, CTL_READ);
if (err < 0)
return err;
err = fwspk_mute_command(fwspk, &fwspk->mute, CTL_READ);
if (err < 0)
return err;
first_ch = fwspk->device_info->mixer_channels == 1 ? 0 : 1;
for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
err = fwspk_volume_command(fwspk, &fwspk->volume[i],
first_ch + i, CTL_CURRENT, CTL_READ);
