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