Unverified Commit c41c2a35 authored by Jerome Brunet's avatar Jerome Brunet Committed by Mark Brown
Browse files

ASoC: meson: add tdm output driver 



Add Amlogic's axg tdm output driver which pulls data from FRDDR fifo
and produce the TDM signals for 4 output lanes.

Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d60e4f1e

sound/soc/meson/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -27,6 +27,14 @@ config SND_MESON_AXG_TDM_INTERFACE 
	tristate

	select SND_MESON_AXG_TDM_FORMATTER



config SND_MESON_AXG_TDMOUT

	tristate "Amlogic AXG TDM Output Support"

	select SND_MESON_AXG_TDM_FORMATTER

	select SND_MESON_AXG_TDM_INTERFACE

	help

	  Select Y or M to add support for TDM output formatter embedded

	  in the Amlogic AXG SoC family



config SND_MESON_AXG_SPDIFOUT

	tristate "Amlogic AXG SPDIF Output Support"

	imply SND_SOC_SPDIF

sound/soc/meson/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ snd-soc-meson-axg-frddr-objs := axg-frddr.o 
snd-soc-meson-axg-toddr-objs := axg-toddr.o

snd-soc-meson-axg-tdm-formatter-objs := axg-tdm-formatter.o

snd-soc-meson-axg-tdm-interface-objs := axg-tdm-interface.o

snd-soc-meson-axg-tdmout-objs := axg-tdmout.o

snd-soc-meson-axg-spdifout-objs := axg-spdifout.o



obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
@@ -12,4 +13,5 @@ obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o 
obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o

obj-$(CONFIG_SND_MESON_AXG_TDM_FORMATTER) += snd-soc-meson-axg-tdm-formatter.o

obj-$(CONFIG_SND_MESON_AXG_TDM_INTERFACE) += snd-soc-meson-axg-tdm-interface.o

obj-$(CONFIG_SND_MESON_AXG_TDMOUT) += snd-soc-meson-axg-tdmout.o

obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o

sound/soc/meson/axg-tdmout.c

0 → 100644
+259 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: (GPL-2.0 OR MIT)

//

// Copyright (c) 2018 BayLibre, SAS.

// Author: Jerome Brunet <jbrunet@baylibre.com>



#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/regmap.h>

#include <sound/soc.h>

#include <sound/soc-dai.h>



#include "axg-tdm-formatter.h"



#define TDMOUT_CTRL0			0x00

#define  TDMOUT_CTRL0_BITNUM_MASK	GENMASK(4, 0)

#define  TDMOUT_CTRL0_BITNUM(x)		((x) << 0)

#define  TDMOUT_CTRL0_SLOTNUM_MASK	GENMASK(9, 5)

#define  TDMOUT_CTRL0_SLOTNUM(x)	((x) << 5)

#define  TDMOUT_CTRL0_INIT_BITNUM_MASK	GENMASK(19, 15)

#define  TDMOUT_CTRL0_INIT_BITNUM(x)	((x) << 15)

#define  TDMOUT_CTRL0_ENABLE		BIT(31)

#define  TDMOUT_CTRL0_RST_OUT		BIT(29)

#define  TDMOUT_CTRL0_RST_IN		BIT(28)

#define TDMOUT_CTRL1			0x04

#define  TDMOUT_CTRL1_TYPE_MASK		GENMASK(6, 4)

#define  TDMOUT_CTRL1_TYPE(x)		((x) << 4)

#define  TDMOUT_CTRL1_MSB_POS_MASK	GENMASK(12, 8)

#define  TDMOUT_CTRL1_MSB_POS(x)	((x) << 8)

#define  TDMOUT_CTRL1_SEL_SHIFT		24

#define  TDMOUT_CTRL1_GAIN_EN		26

#define  TDMOUT_CTRL1_WS_INV		BIT(28)

#define TDMOUT_SWAP			0x08

#define TDMOUT_MASK0			0x0c

#define TDMOUT_MASK1			0x10

#define TDMOUT_MASK2			0x14

#define TDMOUT_MASK3			0x18

#define TDMOUT_STAT			0x1c

#define TDMOUT_GAIN0			0x20

#define TDMOUT_GAIN1			0x24

#define TDMOUT_MUTE_VAL			0x28

#define TDMOUT_MUTE0			0x2c

#define TDMOUT_MUTE1			0x30

#define TDMOUT_MUTE2			0x34

#define TDMOUT_MUTE3			0x38

#define TDMOUT_MASK_VAL			0x3c



static const struct regmap_config axg_tdmout_regmap_cfg = {

	.reg_bits	= 32,

	.val_bits	= 32,

	.reg_stride	= 4,

	.max_register	= TDMOUT_MASK_VAL,

};



static const struct snd_kcontrol_new axg_tdmout_controls[] = {

	SOC_DOUBLE("Lane 0 Volume", TDMOUT_GAIN0,  0,  8, 255, 0),

	SOC_DOUBLE("Lane 1 Volume", TDMOUT_GAIN0, 16, 24, 255, 0),

	SOC_DOUBLE("Lane 2 Volume", TDMOUT_GAIN1,  0,  8, 255, 0),

	SOC_DOUBLE("Lane 3 Volume", TDMOUT_GAIN1, 16, 24, 255, 0),

	SOC_SINGLE("Gain Enable Switch", TDMOUT_CTRL1,

		   TDMOUT_CTRL1_GAIN_EN, 1, 0),

};



static const char * const tdmout_sel_texts[] = {

	"IN 0", "IN 1", "IN 2",

};



static SOC_ENUM_SINGLE_DECL(axg_tdmout_sel_enum, TDMOUT_CTRL1,

			    TDMOUT_CTRL1_SEL_SHIFT, tdmout_sel_texts);



static const struct snd_kcontrol_new axg_tdmout_in_mux =

	SOC_DAPM_ENUM("Input Source", axg_tdmout_sel_enum);



static struct snd_soc_dai *

axg_tdmout_get_be(struct snd_soc_dapm_widget *w)

{

	struct snd_soc_dapm_path *p = NULL;

	struct snd_soc_dai *be;



	snd_soc_dapm_widget_for_each_sink_path(w, p) {

		if (!p->connect)

			continue;



		if (p->sink->id == snd_soc_dapm_dai_in)

			return (struct snd_soc_dai *)p->sink->priv;



		be = axg_tdmout_get_be(p->sink);

		if (be)

			return be;

	}



	return NULL;

}



static struct axg_tdm_stream *

axg_tdmout_get_tdm_stream(struct snd_soc_dapm_widget *w)

{

	struct snd_soc_dai *be = axg_tdmout_get_be(w);



	if (!be)

		return NULL;



	return be->playback_dma_data;

}



static void axg_tdmout_enable(struct regmap *map)

{

	/* Apply both reset */

	regmap_update_bits(map, TDMOUT_CTRL0,

			   TDMOUT_CTRL0_RST_OUT | TDMOUT_CTRL0_RST_IN, 0);



	/* Clear out reset before in reset */

	regmap_update_bits(map, TDMOUT_CTRL0,

			   TDMOUT_CTRL0_RST_OUT, TDMOUT_CTRL0_RST_OUT);

	regmap_update_bits(map, TDMOUT_CTRL0,

			   TDMOUT_CTRL0_RST_IN,  TDMOUT_CTRL0_RST_IN);



	/* Actually enable tdmout */

	regmap_update_bits(map, TDMOUT_CTRL0,

			   TDMOUT_CTRL0_ENABLE, TDMOUT_CTRL0_ENABLE);

}



static void axg_tdmout_disable(struct regmap *map)

{

	regmap_update_bits(map, TDMOUT_CTRL0, TDMOUT_CTRL0_ENABLE, 0);

}



static int axg_tdmout_prepare(struct regmap *map, struct axg_tdm_stream *ts)

{

	unsigned int val = 0;



	/* Set the stream skew */

	switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_I2S:

	case SND_SOC_DAIFMT_DSP_A:

		val |= TDMOUT_CTRL0_INIT_BITNUM(1);

		break;



	case SND_SOC_DAIFMT_LEFT_J:

	case SND_SOC_DAIFMT_RIGHT_J:

	case SND_SOC_DAIFMT_DSP_B:

		val |= TDMOUT_CTRL0_INIT_BITNUM(2);

		break;



	default:

		pr_err("Unsupported format: %u\n",

		       ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK);

		return -EINVAL;

	}



	/* Set the slot width */

	val |= TDMOUT_CTRL0_BITNUM(ts->iface->slot_width - 1);



	/* Set the slot number */

	val |= TDMOUT_CTRL0_SLOTNUM(ts->iface->slots - 1);



	regmap_update_bits(map, TDMOUT_CTRL0,

			   TDMOUT_CTRL0_INIT_BITNUM_MASK |

			   TDMOUT_CTRL0_BITNUM_MASK |

			   TDMOUT_CTRL0_SLOTNUM_MASK, val);



	/* Set the sample width */

	val = TDMOUT_CTRL1_MSB_POS(ts->width - 1);



	/* FIFO data are arranged in chunks of 64bits */

	switch (ts->physical_width) {

	case 8:

		/* 8 samples of 8 bits */

		val |= TDMOUT_CTRL1_TYPE(0);

		break;

	case 16:

		/* 4 samples of 16 bits - right justified */

		val |= TDMOUT_CTRL1_TYPE(2);

		break;

	case 32:

		/* 2 samples of 32 bits - right justified */

		val |= TDMOUT_CTRL1_TYPE(4);

		break;

	default:

		pr_err("Unsupported physical width: %u\n",

		       ts->physical_width);

		return -EINVAL;

	}



	/* If the sample clock is inverted, invert it back for the formatter */

	if (axg_tdm_lrclk_invert(ts->iface->fmt))

		val |= TDMOUT_CTRL1_WS_INV;



	regmap_update_bits(map, TDMOUT_CTRL1,

			   (TDMOUT_CTRL1_TYPE_MASK | TDMOUT_CTRL1_MSB_POS_MASK |

			    TDMOUT_CTRL1_WS_INV), val);



	/* Set static swap mask configuration */

	regmap_write(map, TDMOUT_SWAP, 0x76543210);



	return axg_tdm_formatter_set_channel_masks(map, ts, TDMOUT_MASK0);

}



static const struct snd_soc_dapm_widget axg_tdmout_dapm_widgets[] = {

	SND_SOC_DAPM_AIF_IN("IN 0", NULL, 0, SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_AIF_IN("IN 1", NULL, 0, SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_AIF_IN("IN 2", NULL, 0, SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_tdmout_in_mux),

	SND_SOC_DAPM_PGA_E("ENC", SND_SOC_NOPM, 0, 0, NULL, 0,

			   axg_tdm_formatter_event,

			   (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD)),

	SND_SOC_DAPM_AIF_OUT("OUT", NULL, 0, SND_SOC_NOPM, 0, 0),

};



static const struct snd_soc_dapm_route axg_tdmout_dapm_routes[] = {

	{ "SRC SEL", "IN 0", "IN 0" },

	{ "SRC SEL", "IN 1", "IN 1" },

	{ "SRC SEL", "IN 2", "IN 2" },

	{ "ENC", NULL, "SRC SEL" },

	{ "OUT", NULL, "ENC" },

};



static const struct snd_soc_component_driver axg_tdmout_component_drv = {

	.controls		= axg_tdmout_controls,

	.num_controls		= ARRAY_SIZE(axg_tdmout_controls),

	.dapm_widgets		= axg_tdmout_dapm_widgets,

	.num_dapm_widgets	= ARRAY_SIZE(axg_tdmout_dapm_widgets),

	.dapm_routes		= axg_tdmout_dapm_routes,

	.num_dapm_routes	= ARRAY_SIZE(axg_tdmout_dapm_routes),

};



static const struct axg_tdm_formatter_ops axg_tdmout_ops = {

	.get_stream	= axg_tdmout_get_tdm_stream,

	.prepare	= axg_tdmout_prepare,

	.enable		= axg_tdmout_enable,

	.disable	= axg_tdmout_disable,

};



static const struct axg_tdm_formatter_driver axg_tdmout_drv = {

	.component_drv	= &axg_tdmout_component_drv,

	.regmap_cfg	= &axg_tdmout_regmap_cfg,

	.ops		= &axg_tdmout_ops,

	.invert_sclk	= true,

};



static const struct of_device_id axg_tdmout_of_match[] = {

	{

		.compatible = "amlogic,axg-tdmout",

		.data = &axg_tdmout_drv,

	}, {}

};

MODULE_DEVICE_TABLE(of, axg_tdmout_of_match);



static struct platform_driver axg_tdmout_pdrv = {

	.probe = axg_tdm_formatter_probe,

	.driver = {

		.name = "axg-tdmout",

		.of_match_table = axg_tdmout_of_match,

	},

};

module_platform_driver(axg_tdmout_pdrv);



MODULE_DESCRIPTION("Amlogic AXG TDM output formatter driver");

MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");

MODULE_LICENSE("GPL v2");