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/*
* oxfw_stream.c - a part of driver for OXFW970/971 based devices
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "oxfw.h"
enum control_action { CTL_READ, CTL_WRITE };
enum control_attribute {
CTL_MIN = 0x02,
CTL_MAX = 0x03,
CTL_CURRENT = 0x10,
};
static int oxfw_mute_command(struct snd_oxfw *oxfw, bool *value,
enum control_action action)
{
u8 *buf;
u8 response_ok;
int err;
buf = kmalloc(11, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (action == CTL_READ) {
buf[0] = 0x01; /* AV/C, STATUS */
response_ok = 0x0c; /* STABLE */
} else {
buf[0] = 0x00; /* AV/C, CONTROL */
response_ok = 0x09; /* ACCEPTED */
}
buf[1] = 0x08; /* audio unit 0 */
buf[2] = 0xb8; /* FUNCTION BLOCK */
buf[3] = 0x81; /* function block type: feature */
buf[4] = oxfw->device_info->mute_fb_id; /* function block ID */
buf[5] = 0x10; /* control attribute: current */
buf[6] = 0x02; /* selector length */
buf[7] = 0x00; /* audio channel number */
buf[8] = 0x01; /* control selector: mute */
buf[9] = 0x01; /* control data length */
if (action == CTL_READ)
buf[10] = 0xff;
else
buf[10] = *value ? 0x70 : 0x60;
err = fcp_avc_transaction(oxfw->unit, buf, 11, buf, 11, 0x3fe);
if (err < 0)
goto error;
if (err < 11) {
dev_err(&oxfw->unit->device, "short FCP response\n");
err = -EIO;
goto error;
}
if (buf[0] != response_ok) {
dev_err(&oxfw->unit->device, "mute command failed\n");
err = -EIO;
goto error;
}
if (action == CTL_READ)
*value = buf[10] == 0x70;
err = 0;
error:
kfree(buf);
return err;
}
static int oxfw_volume_command(struct snd_oxfw *oxfw, s16 *value,
unsigned int channel,
enum control_attribute attribute,
enum control_action action)
{
u8 *buf;
u8 response_ok;
int err;
buf = kmalloc(12, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (action == CTL_READ) {
buf[0] = 0x01; /* AV/C, STATUS */
response_ok = 0x0c; /* STABLE */
} else {
buf[0] = 0x00; /* AV/C, CONTROL */
response_ok = 0x09; /* ACCEPTED */
}
buf[1] = 0x08; /* audio unit 0 */
buf[2] = 0xb8; /* FUNCTION BLOCK */
buf[3] = 0x81; /* function block type: feature */
buf[4] = oxfw->device_info->volume_fb_id; /* function block ID */
buf[5] = attribute; /* control attribute */
buf[6] = 0x02; /* selector length */
buf[7] = channel; /* audio channel number */
buf[8] = 0x02; /* control selector: volume */
buf[9] = 0x02; /* control data length */
if (action == CTL_READ) {
buf[10] = 0xff;
buf[11] = 0xff;
} else {
buf[10] = *value >> 8;
buf[11] = *value;
}
err = fcp_avc_transaction(oxfw->unit, buf, 12, buf, 12, 0x3fe);
if (err < 0)
goto error;
if (err < 12) {
dev_err(&oxfw->unit->device, "short FCP response\n");
err = -EIO;
goto error;
}
if (buf[0] != response_ok) {
dev_err(&oxfw->unit->device, "volume command failed\n");
err = -EIO;
goto error;
}
if (action == CTL_READ)
*value = (buf[10] << 8) | buf[11];
err = 0;
error:
kfree(buf);
return err;
}
static int oxfw_mute_get(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
value->value.integer.value[0] = !oxfw->mute;
return 0;
}
static int oxfw_mute_put(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
bool mute;
int err;
mute = !value->value.integer.value[0];
if (mute == oxfw->mute)
return 0;
err = oxfw_mute_command(oxfw, &mute, CTL_WRITE);
if (err < 0)
return err;
oxfw->mute = mute;
return 1;
}
static int oxfw_volume_info(struct snd_kcontrol *control,
struct snd_ctl_elem_info *info)
{
struct snd_oxfw *oxfw = control->private_data;
info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
info->count = oxfw->device_info->mixer_channels;
info->value.integer.min = oxfw->volume_min;
info->value.integer.max = oxfw->volume_max;
return 0;
}
static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
static int oxfw_volume_get(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
unsigned int i;
for (i = 0; i < oxfw->device_info->mixer_channels; ++i)
value->value.integer.value[channel_map[i]] = oxfw->volume[i];
return 0;
}
static int oxfw_volume_put(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
unsigned int i, changed_channels;
bool equal_values = true;
s16 volume;
int err;
for (i = 0; i < oxfw->device_info->mixer_channels; ++i) {
if (value->value.integer.value[i] < oxfw->volume_min ||
value->value.integer.value[i] > oxfw->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 < oxfw->device_info->mixer_channels; ++i)
if (value->value.integer.value[channel_map[i]] !=
oxfw->volume[i])
changed_channels |= 1 << (i + 1);
if (equal_values && changed_channels != 0)
changed_channels = 1 << 0;
for (i = 0; i <= oxfw->device_info->mixer_channels; ++i) {
volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
if (changed_channels & (1 << i)) {
err = oxfw_volume_command(oxfw, &volume, i,
CTL_CURRENT, CTL_WRITE);
if (err < 0)
return err;
}
if (i > 0)
oxfw->volume[i - 1] = volume;
}
return changed_channels != 0;
}
int snd_oxfw_create_mixer(struct snd_oxfw *oxfw)
{
static const struct snd_kcontrol_new controls[] = {
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Playback Switch",
.info = snd_ctl_boolean_mono_info,
.get = oxfw_mute_get,
.put = oxfw_mute_put,
},
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PCM Playback Volume",
.info = oxfw_volume_info,
.get = oxfw_volume_get,
.put = oxfw_volume_put,
},
};
unsigned int i, first_ch;
int err;
err = oxfw_volume_command(oxfw, &oxfw->volume_min,
0, CTL_MIN, CTL_READ);
if (err < 0)
return err;
err = oxfw_volume_command(oxfw, &oxfw->volume_max,
0, CTL_MAX, CTL_READ);
if (err < 0)
return err;
err = oxfw_mute_command(oxfw, &oxfw->mute, CTL_READ);
if (err < 0)
return err;
first_ch = oxfw->device_info->mixer_channels == 1 ? 0 : 1;
for (i = 0; i < oxfw->device_info->mixer_channels; ++i) {
err = oxfw_volume_command(oxfw, &oxfw->volume[i],
first_ch + i, CTL_CURRENT, CTL_READ);
if (err < 0)
return err;
}
for (i = 0; i < ARRAY_SIZE(controls); ++i) {
err = snd_ctl_add(oxfw->card,
snd_ctl_new1(&controls[i], oxfw));
if (err < 0)
return err;
}
return 0;
}
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