// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <dt-bindings/sound/meson-aiu.h>
#include "aiu.h"
#include "meson-codec-glue.h"
#define CTRL_DIN_EN 15
#define CTRL_CLK_INV BIT(14)
#define CTRL_LRCLK_INV BIT(13)
#define CTRL_I2S_IN_BCLK_SRC BIT(11)
#define CTRL_DIN_LRCLK_SRC_SHIFT 6
#define CTRL_DIN_LRCLK_SRC (0x3 << CTRL_DIN_LRCLK_SRC_SHIFT)
#define CTRL_BCLK_MCLK_SRC GENMASK(5, 4)
#define CTRL_DIN_SKEW GENMASK(3, 2)
#define CTRL_I2S_OUT_LANE_SRC 0
#define AIU_ACODEC_OUT_CHMAX 2
static const char * const aiu_acodec_ctrl_mux_texts[] = {
"DISABLED", "I2S", "PCM",
};
static int aiu_acodec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component =
snd_soc_dapm_kcontrol_component(kcontrol);
struct snd_soc_dapm_context *dapm =
snd_soc_dapm_kcontrol_dapm(kcontrol);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int mux, changed;
mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
changed = snd_soc_component_test_bits(component, e->reg,
CTRL_DIN_LRCLK_SRC,
FIELD_PREP(CTRL_DIN_LRCLK_SRC,
mux));
if (!changed)
return 0;
/* Force disconnect of the mux while updating */
snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
snd_soc_component_update_bits(component, e->reg,
CTRL_DIN_LRCLK_SRC |
CTRL_BCLK_MCLK_SRC,
FIELD_PREP(CTRL_DIN_LRCLK_SRC, mux) |
FIELD_PREP(CTRL_BCLK_MCLK_SRC, mux));
snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
return 1;
}
static SOC_ENUM_SINGLE_DECL(aiu_acodec_ctrl_mux_enum, AIU_ACODEC_CTRL,
CTRL_DIN_LRCLK_SRC_SHIFT,
aiu_acodec_ctrl_mux_texts);
static const struct snd_kcontrol_new aiu_acodec_ctrl_mux =
SOC_DAPM_ENUM_EXT("ACodec Source", aiu_acodec_ctrl_mux_enum,
snd_soc_dapm_get_enum_double,
aiu_acodec_ctrl_mux_put_enum);
static const struct snd_kcontrol_new aiu_acodec_ctrl_out_enable =
SOC_DAPM_SINGLE_AUTODISABLE("Switch", AIU_ACODEC_CTRL,
CTRL_DIN_EN, 1, 0);
static const struct snd_soc_dapm_widget aiu_acodec_ctrl_widgets[] = {
SND_SOC_DAPM_MUX("ACODEC SRC", SND_SOC_NOPM, 0, 0,
&aiu_acodec_ctrl_mux),
SND_SOC_DAPM_SWITCH("ACODEC OUT EN", SND_SOC_NOPM, 0, 0,
&aiu_acodec_ctrl_out_enable),
};
static int aiu_acodec_ctrl_input_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct meson_codec_glue_input *data;
int ret;
ret = meson_codec_glue_input_hw_params(substream, params, dai);
if (ret)
return ret;
/* The glue will provide 1 lane out of the 4 to the output */
data = meson_codec_glue_input_get_data(dai);
data->params.channels_min = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
data->params.channels_min);
data->params.channels_max = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
data->params.channels_max);
return 0;
}
static const struct snd_soc_dai_ops aiu_acodec_ctrl_input_ops = {
.hw_params = aiu_acodec_ctrl_input_hw_params,
.set_fmt = meson_codec_glue_input_set_fmt,
};
static const struct snd_soc_dai_ops aiu_acodec_ctrl_output_ops = {
.startup = meson_codec_glue_output_startup,
};
#define AIU_ACODEC_CTRL_FORMATS \
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
#define AIU_ACODEC_STREAM(xname, xsuffix, xchmax) \
{ \
.stream_name = xname " " xsuffix, \
.channels_min = 1, \
.channels_max = (xchmax), \
.rate_min = 5512, \
.rate_max = 192000, \
.formats = AIU_ACODEC_CTRL_FORMATS, \
}
#define AIU_ACODEC_INPUT(xname) { \
.name = "ACODEC CTRL " xname, \
.playback = AIU_ACODEC_STREAM(xname, "Playback", 8), \
.ops = &aiu_acodec_ctrl_input_ops, \
.probe = meson_codec_glue_input_dai_probe, \
.remove = meson_codec_glue_input_dai_remove, \
}
#define AIU_ACODEC_OUTPUT(xname) { \
.name = "ACODEC CTRL " xname, \
.capture = AIU_ACODEC_STREAM(xname, "Capture", AIU_ACODEC_OUT_CHMAX), \
.ops = &aiu_acodec_ctrl_output_ops, \
}
static struct snd_soc_dai_driver aiu_acodec_ctrl_dai_drv[] = {
[CTRL_I2S] = AIU_ACODEC_INPUT("ACODEC I2S IN"),
[CTRL_PCM] = AIU_ACODEC_INPUT("ACODEC PCM IN"),
[CTRL_OUT] = AIU_ACODEC_OUTPUT("ACODEC OUT"),
};
static const struct snd_soc_dapm_route aiu_acodec_ctrl_routes[] = {
{ "ACODEC SRC", "I2S", "ACODEC I2S IN Playback" },
{ "ACODEC SRC", "PCM", "ACODEC PCM IN Playback" },
{ "ACODEC OUT EN", "Switch", "ACODEC SRC" },
{ "ACODEC OUT Capture", NULL, "ACODEC OUT EN" },
};
static const struct snd_kcontrol_new aiu_acodec_ctrl_controls[] = {
SOC_SINGLE("ACODEC I2S Lane Select", AIU_ACODEC_CTRL,
CTRL_I2S_OUT_LANE_SRC, 3, 0),
};
static int aiu_acodec_of_xlate_dai_name(struct snd_soc_component *component,
const struct of_phandle_args *args,
const char **dai_name)
{
return aiu_of_xlate_dai_name(component, args, dai_name, AIU_ACODEC);
}
static int aiu_acodec_ctrl_component_probe(struct snd_soc_component *component)
{
/*
* NOTE: Din Skew setting
* According to the documentation, the following update adds one delay
* to the din line. Without this, the output saturates. This happens
* regardless of the link format (i2s or left_j) so it is not clear what
* it actually does but it seems to be required
*/
snd_soc_component_update_bits(component, AIU_ACODEC_CTRL,
CTRL_DIN_SKEW,
FIELD_PREP(CTRL_DIN_SKEW, 2));
return 0;
}
static const struct snd_soc_component_driver aiu_acodec_ctrl_component = {
.name = "AIU Internal DAC Codec Control",
.probe = aiu_acodec_ctrl_component_probe,
.controls = aiu_acodec_ctrl_controls,
.num_controls = ARRAY_SIZE(aiu_acodec_ctrl_controls),
.dapm_widgets = aiu_acodec_ctrl_widgets,
.num_dapm_widgets = ARRAY_SIZE(aiu_acodec_ctrl_widgets),
.dapm_routes = aiu_acodec_ctrl_routes,
.num_dapm_routes = ARRAY_SIZE(aiu_acodec_ctrl_routes),
.of_xlate_dai_name = aiu_acodec_of_xlate_dai_name,
.endianness = 1,
#ifdef CONFIG_DEBUG_FS
.debugfs_prefix = "acodec",
#endif
};
int aiu_acodec_ctrl_register_component(struct device *dev)
{
return snd_soc_register_component(dev, &aiu_acodec_ctrl_component,
aiu_acodec_ctrl_dai_drv,
ARRAY_SIZE(aiu_acodec_ctrl_dai_drv));
}
