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/*
* oxfw-spkr.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"
struct fw_spkr {
bool mute;
s16 volume[6];
s16 volume_min;
s16 volume_max;
unsigned int mixer_channels;
u8 mute_fb_id;
u8 volume_fb_id;
};
enum control_action { CTL_READ, CTL_WRITE };
enum control_attribute {
CTL_MIN = 0x02,
CTL_MAX = 0x03,
CTL_CURRENT = 0x10,
};
static int avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, 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] = 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(unit, buf, 11, buf, 11, 0x3fe);
if (err < 0)
goto error;
if (err < 11) {
dev_err(&unit->device, "short FCP response\n");
err = -EIO;
goto error;
}
if (buf[0] != response_ok) {
dev_err(&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 avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, 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] = 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(unit, buf, 12, buf, 12, 0x3fe);
if (err < 0)
goto error;
if (err < 12) {
dev_err(&unit->device, "short FCP response\n");
err = -EIO;
goto error;
}
if (buf[0] != response_ok) {
dev_err(&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 spkr_mute_get(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
struct fw_spkr *spkr = oxfw->spec;
value->value.integer.value[0] = !spkr->mute;
return 0;
}
static int spkr_mute_put(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
struct fw_spkr *spkr = oxfw->spec;
bool mute;
int err;
mute = !value->value.integer.value[0];
if (mute == spkr->mute)
return 0;
err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &mute,
CTL_WRITE);
if (err < 0)
return err;
spkr->mute = mute;
return 1;
}
static int spkr_volume_info(struct snd_kcontrol *control,
struct snd_ctl_elem_info *info)
{
struct snd_oxfw *oxfw = control->private_data;
struct fw_spkr *spkr = oxfw->spec;
info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
info->count = spkr->mixer_channels;
info->value.integer.min = spkr->volume_min;
info->value.integer.max = spkr->volume_max;
return 0;
}
static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
static int spkr_volume_get(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
struct fw_spkr *spkr = oxfw->spec;
unsigned int i;
for (i = 0; i < spkr->mixer_channels; ++i)
value->value.integer.value[channel_map[i]] = spkr->volume[i];
return 0;
}
static int spkr_volume_put(struct snd_kcontrol *control,
struct snd_ctl_elem_value *value)
{
struct snd_oxfw *oxfw = control->private_data;
struct fw_spkr *spkr = oxfw->spec;
unsigned int i, changed_channels;
bool equal_values = true;
s16 volume;
int err;
for (i = 0; i < spkr->mixer_channels; ++i) {
if (value->value.integer.value[i] < spkr->volume_min ||
value->value.integer.value[i] > spkr->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 < spkr->mixer_channels; ++i)
if (value->value.integer.value[channel_map[i]] !=
spkr->volume[i])<
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