Unverified Commit af2618a2 authored by Jerome Brunet's avatar Jerome Brunet Committed by Mark Brown
Browse files

ASoC: meson: g12a: add internal DAC glue driver 



Add support for the internal audio DAC glue found on the Amlogic g12a
and sm1 SoC families. This allows to connect the TDM outputs of the SoC
to the internal t9015 audio DAC.

Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200221153607.1585499-3-jbrunet@baylibre.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent bd56e593

sound/soc/meson/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -109,6 +109,15 @@ config SND_MESON_GX_SOUND_CARD 
	help

	  Select Y or M to add support for the GXBB/GXL SoC sound card



config SND_MESON_G12A_TOACODEC

	tristate "Amlogic G12A To Internal DAC Control Support"

	select SND_MESON_CODEC_GLUE

	select REGMAP_MMIO

	imply SND_SOC_MESON_T9015

	help

	  Select Y or M to add support for the internal audio DAC on the

	  g12a SoC family



config SND_MESON_G12A_TOHDMITX

	tristate "Amlogic G12A To HDMI TX Control Support"

	select REGMAP_MMIO

sound/soc/meson/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ snd-soc-meson-axg-pdm-objs := axg-pdm.o 
snd-soc-meson-card-utils-objs := meson-card-utils.o

snd-soc-meson-codec-glue-objs := meson-codec-glue.o

snd-soc-meson-gx-sound-card-objs := gx-card.o

snd-soc-meson-g12a-toacodec-objs := g12a-toacodec.o

snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o

snd-soc-meson-t9015-objs := t9015.o
@@ -40,5 +41,6 @@ obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o 
obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o

obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o

obj-$(CONFIG_SND_MESON_GX_SOUND_CARD) += snd-soc-meson-gx-sound-card.o

obj-$(CONFIG_SND_MESON_G12A_TOACODEC) += snd-soc-meson-g12a-toacodec.o

obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o

obj-$(CONFIG_SND_SOC_MESON_T9015) += snd-soc-meson-t9015.o

sound/soc/meson/g12a-toacodec.c

0 → 100644
+252 −0
Original line number Diff line number Diff line 
// 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;



	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 0;

}



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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