321 lines
7.3 KiB
C
321 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* oxfw-spkr.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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*/
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#include "oxfw.h"
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struct fw_spkr {
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bool mute;
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s16 volume[6];
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s16 volume_min;
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s16 volume_max;
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unsigned int mixer_channels;
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u8 mute_fb_id;
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u8 volume_fb_id;
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};
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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 avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, 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] = 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(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(&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(&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 avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, 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] = 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(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(&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(&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 spkr_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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struct fw_spkr *spkr = oxfw->spec;
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value->value.integer.value[0] = !spkr->mute;
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return 0;
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}
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static int spkr_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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struct fw_spkr *spkr = oxfw->spec;
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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 == spkr->mute)
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return 0;
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err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &mute,
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CTL_WRITE);
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if (err < 0)
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return err;
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spkr->mute = mute;
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return 1;
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}
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static int spkr_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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struct fw_spkr *spkr = oxfw->spec;
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info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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info->count = spkr->mixer_channels;
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info->value.integer.min = spkr->volume_min;
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info->value.integer.max = spkr->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 spkr_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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struct fw_spkr *spkr = oxfw->spec;
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unsigned int i;
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for (i = 0; i < spkr->mixer_channels; ++i)
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value->value.integer.value[channel_map[i]] = spkr->volume[i];
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return 0;
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}
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static int spkr_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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struct fw_spkr *spkr = oxfw->spec;
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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 < spkr->mixer_channels; ++i) {
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if (value->value.integer.value[i] < spkr->volume_min ||
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value->value.integer.value[i] > spkr->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 < spkr->mixer_channels; ++i)
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if (value->value.integer.value[channel_map[i]] !=
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spkr->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 <= spkr->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 = avc_audio_feature_volume(oxfw->unit,
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spkr->volume_fb_id, &volume,
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i, 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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spkr->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_add_spkr(struct snd_oxfw *oxfw, bool is_lacie)
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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 = spkr_mute_get,
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.put = spkr_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 = spkr_volume_info,
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.get = spkr_volume_get,
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.put = spkr_volume_put,
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},
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};
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struct fw_spkr *spkr;
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unsigned int i, first_ch;
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int err;
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spkr = devm_kzalloc(&oxfw->card->card_dev, sizeof(struct fw_spkr),
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GFP_KERNEL);
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if (!spkr)
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return -ENOMEM;
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oxfw->spec = spkr;
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if (is_lacie) {
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spkr->mixer_channels = 1;
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spkr->mute_fb_id = 0x01;
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spkr->volume_fb_id = 0x01;
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} else {
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spkr->mixer_channels = 6;
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spkr->mute_fb_id = 0x01;
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spkr->volume_fb_id = 0x02;
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}
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err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
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&spkr->volume_min, 0, CTL_MIN, CTL_READ);
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if (err < 0)
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return err;
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err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
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&spkr->volume_max, 0, CTL_MAX, CTL_READ);
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if (err < 0)
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return err;
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err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &spkr->mute,
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CTL_READ);
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if (err < 0)
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return err;
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first_ch = spkr->mixer_channels == 1 ? 0 : 1;
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for (i = 0; i < spkr->mixer_channels; ++i) {
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err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
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&spkr->volume[i], first_ch + i,
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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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