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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <sound/pcm_params.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <dt-bindings/sound/meson-g12a-toacodec.h>
#include "axg-tdm.h"
#include "meson-codec-glue.h"
#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
#define TOACODEC_CTRL0 0x0
#define CTRL0_ENABLE_SHIFT 31
#define CTRL0_DAT_SEL_SHIFT 14
#define CTRL0_DAT_SEL (0x3 << CTRL0_DAT_SEL_SHIFT)
#define CTRL0_LANE_SEL 12
#define CTRL0_LRCLK_SEL GENMASK(9, 8)
#define CTRL0_BLK_CAP_INV BIT(7)
#define CTRL0_BCLK_O_INV BIT(6)
#define CTRL0_BCLK_SEL GENMASK(5, 4)
#define CTRL0_MCLK_SEL GENMASK(2, 0)
#define TOACODEC_OUT_CHMAX 2
static const char * const g12a_toacodec_mux_texts[] = {
"I2S A", "I2S B", "I2S C",
};
static int g12a_toacodec_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;
if (ucontrol->value.enumerated.item[0] >= e->items)
return -EINVAL;
mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
changed = snd_soc_component_test_bits(component, e->reg,
CTRL0_DAT_SEL,
FIELD_PREP(CTRL0_DAT_SEL, 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,
CTRL0_DAT_SEL |
CTRL0_LRCLK_SEL |
CTRL0_BCLK_SEL,
FIELD_PREP(CTRL0_DAT_SEL, mux) |
FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
FIELD_PREP(CTRL0_BCLK_SEL, mux));
/*
* FIXME:
* On this soc, the glue gets the MCLK directly from the clock
* controller instead of going the through the TDM interface.
*
* Here we assume interface A uses clock A, etc ... While it is
* true for now, it could be different. Instead the glue should
* find out the clock used by the interface and select the same
* source. For that, we will need regmap backed clock mux which
* is a work in progress
*/
snd_soc_component_update_bits(component, e->reg,
CTRL0_MCLK_SEL,
FIELD_PREP(CTRL0_MCLK_SEL, mux));
snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
return 1;
}
static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
CTRL0_DAT_SEL_SHIFT,
g12a_toacodec_mux_texts);
static const struct snd_kcontrol_new g12a_toacodec_mux =
SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
snd_soc_dapm_get_enum_double,
g12a_toacodec_mux_put_enum);
static const struct snd_kcontrol_new g12a_toacodec_out_enable =
SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
CTRL0_ENABLE_SHIFT, 1, 0);
static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
&g12a_toacodec_mux),
SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
&g12a_toacodec_out_enable),
};
static int g12a_toacodec_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, TOACODEC_OUT_CHMAX,
data->params.channels_min);
data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
data->params.channels_max);
return 0;
}
static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
.hw_params = g12a_toacodec_input_hw_params,
.set_fmt = meson_codec_glue_input_set_fmt,
};
static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
.startup = meson_codec_glue_output_startup,
};
#define TOACODEC_STREAM(xname, xsuffix, xchmax) \
{ \
.stream_name = xname " " xsuffix, \
.channels_min = 1, \
.channels_max = (xchmax), \
.rate_min = 5512, \
.rate_max = 192000, \
.formats = AXG_TDM_FORMATS, \
}
#define TOACODEC_INPUT(xname, xid) { \
.name = xname, \
.id = (xid), \
.playback = TOACODEC_STREAM(xname, "Playback", 8), \
.ops = &g12a_toacodec_input_ops, \
.probe = meson_codec_glue_input_dai_probe, \
.remove = meson_codec_glue_input_dai_remove, \
}
#define TOACODEC_OUTPUT(xname, xid) { \
.name = xname, \
.id = (xid), \
.capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
.ops = &g12a_toacodec_output_ops, \
}
static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
TOACODEC_INPUT("IN A", TOACODEC_IN_A),
TOACODEC_INPUT("IN B", TOACODEC_IN_B),
TOACODEC_INPUT("IN C", TOACODEC_IN_C),
TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
};
static int g12a_toacodec_component_probe(struct snd_soc_component *c)
{
/* Initialize the static clock parameters */
return snd_soc_component_write(c, TOACODEC_CTRL0,
CTRL0_BLK_CAP_INV);
}
static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
{ "SRC", "I2S A", "IN A Playback" },
{ "SRC", "I2S B", "IN B Playback" },
{ "SRC", "I2S C", "IN C Playback" },
{ "OUT EN", "Switch", "SRC" },
{ "OUT Capture", NULL, "OUT EN" },
};
static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
};
static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
.probe = g12a_toacodec_component_probe,
.controls = g12a_toacodec_controls,
.num_controls = ARRAY_SIZE(g12a_toacodec_controls),
.dapm_widgets = g12a_toacodec_widgets,
.num_dapm_widgets = ARRAY_SIZE(g12a_toacodec_widgets),
.dapm_routes = g12a_toacodec_routes,
.num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct regmap_config g12a_toacodec_regmap_cfg = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
static const struct of_device_id g12a_toacodec_of_match[] = {
{ .compatible = "amlogic,g12a-toacodec", },
{}
};
MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
static int g12a_toacodec_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
void __iomem *regs;
struct regmap *map;
int ret;
ret = device_reset(dev);
if (ret)
return ret;
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return PTR_ERR(regs);
map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
if (IS_ERR(map)) {
dev_err(dev, "failed to init regmap: %ld\n",
PTR_ERR(map));
return PTR_ERR(map);
}
return devm_snd_soc_register_component(dev,
&g12a_toacodec_component_drv, g12a_toacodec_dai_drv,
ARRAY_SIZE(g12a_toacodec_dai_drv));
}
static struct platform_driver g12a_toacodec_pdrv = {
.driver = {
.name = G12A_TOACODEC_DRV_NAME,
.of_match_table = g12a_toacodec_of_match,
},
.probe = g12a_toacodec_probe,
};
module_platform_driver(g12a_toacodec_pdrv);
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
MODULE_LICENSE("GPL v2");
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