ASoC: codecs: max98373: add SoundWire support

Add SoundWire specific parts and extend common ones already split from
I2C.
Signed-off-by: Ryan Lee <ryans.lee@maximintegrated.com>
Signed-off-by: Naveen Manohar <naveen.m@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200708203215.231776-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -116,6 +116,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_MAX98926
 	imply SND_SOC_MAX98927
 	imply SND_SOC_MAX98373_I2C
+	imply SND_SOC_MAX98373_SDW
 	imply SND_SOC_MAX98390
 	imply SND_SOC_MAX9850
 	imply SND_SOC_MAX9860
@@ -875,6 +876,19 @@ config SND_SOC_MAX98373_I2C
 	depends on I2C
 	select SND_SOC_MAX98373
 
+config SND_SOC_MAX98373_SDW
+	tristate "Maxim Integrated MAX98373 Speaker Amplifier - SDW"
+	depends on SOUNDWIRE
+	select SND_SOC_MAX98373
+	select REGMAP_SOUNDWIRE
+	help
+	  Enable support for Maxim Integrated MAX98373 Soundwire
+	  amplifier. MAX98373 supports either the MIPI SoundWire
+	  compatible interface for audio and control data, or
+	  the PCM interface for audio data and a standard I2C
+	  interface for control data. Select this if MAX98373 is
+	  connected via soundwire.
+
 config SND_SOC_MAX98390
 	tristate "Maxim Integrated MAX98390 Speaker Amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -116,6 +116,7 @@ snd-soc-max98926-objs := max98926.o
 snd-soc-max98927-objs := max98927.o
 snd-soc-max98373-objs := max98373.o
 snd-soc-max98373-i2c-objs := max98373-i2c.o
+snd-soc-max98373-sdw-objs := max98373-sdw.o
 snd-soc-max98390-objs := max98390.o
 snd-soc-max9850-objs := max9850.o
 snd-soc-max9860-objs := max9860.o
@@ -420,6 +421,7 @@ obj-$(CONFIG_SND_SOC_MAX98926)	+= snd-soc-max98926.o
 obj-$(CONFIG_SND_SOC_MAX98927)	+= snd-soc-max98927.o
 obj-$(CONFIG_SND_SOC_MAX98373)	+= snd-soc-max98373.o
 obj-$(CONFIG_SND_SOC_MAX98373_I2C)   += snd-soc-max98373-i2c.o
+obj-$(CONFIG_SND_SOC_MAX98373_SDW)   += snd-soc-max98373-sdw.o
 obj-$(CONFIG_SND_SOC_MAX98390)	+= snd-soc-max98390.o
 obj-$(CONFIG_SND_SOC_MAX9850)	+= snd-soc-max9850.o
 obj-$(CONFIG_SND_SOC_MAX9860)	+= snd-soc-max9860.o

sound/soc/codecs/max98373-sdw.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (c) 2020 Maxim Integrated */
+
+#ifndef _MAX98373_SDW_H
+#define _MAX98373_SDW_H
+
+#include "max98373.h"
+
+/* SoundWire Slave Control Port (SCP)  */
+#define MAX98373_R0040_SCP_INIT_STAT_1		0x0040
+#define MAX98373_R0041_SCP_INIT_MASK_1		0x0041
+#define MAX98373_R0042_SCP_INIT_STAT_2		0x0042
+#define MAX98373_R0044_SCP_CTRL			0x0044
+#define MAX98373_R0045_SCP_SYSTEM_CTRL		0x0045
+#define MAX98373_R0046_SCP_DEV_NUMBER		0x0046
+#define MAX98373_R0050_SCP_DEV_ID_0		0x0050
+#define MAX98373_R0051_SCP_DEV_ID_1		0x0051
+#define MAX98373_R0052_SCP_DEV_ID_2		0x0052
+#define MAX98373_R0053_SCP_DEV_ID_3		0x0053
+#define MAX98373_R0054_SCP_DEV_ID_4		0x0054
+#define MAX98373_R0055_SCP_DEV_ID_5		0x0055
+#define MAX98373_R0060_SCP_FRAME_CTLR		0x0060
+#define MAX98373_R0070_SCP_FRAME_CTLR		0x0070
+
+/* SoundWire Device Data Port (DP)  */
+/* Data Port 1 Registers */
+#define MAX98373_R0100_DP1_INIT_STAT		0x0100
+#define MAX98373_R0101_DP1_INIT_MASK		0x0101
+#define MAX98373_R0102_DP1_PORT_CTRL		0x0102
+#define MAX98373_R0103_DP1_BLOCK_CTRL_1		0x0103
+#define MAX98373_R0104_DP1_PREPARE_STATUS	0x0104
+#define MAX98373_R0105_DP1_PREPARE_CTRL		0x0105
+/* Data Port 1 Bank 0 Registers */
+#define MAX98373_R0120_DP1_CHANNEL_EN		0x0120
+#define MAX98373_R0122_DP1_SAMPLE_CTRL1		0x0122
+#define MAX98373_R0123_DP1_SAMPLE_CTRL2		0x0123
+#define MAX98373_R0124_DP1_OFFSET_CTRL1		0x0124
+#define MAX98373_R0125_DP1_OFFSET_CTRL2		0x0125
+#define MAX98373_R0126_DP1_HCTRL		0x0126
+#define MAX98373_R0127_DP1_BLOCK_CTRL3		0x0127
+/* Data Port 1 Bank 1 Registers */
+#define MAX98373_R0130_DP1_CHANNEL_EN		0x0130
+#define MAX98373_R0132_DP1_SAMPLE_CTRL1		0x0132
+#define MAX98373_R0133_DP1_SAMPLE_CTRL2		0x0133
+#define MAX98373_R0134_DP1_OFFSET_CTRL1		0x0134
+#define MAX98373_R0135_DP1_OFFSET_CTRL2		0x0135
+#define MAX98373_R0136_DP1_HCTRL		0x0136
+#define MAX98373_R0137_DP1_BLOCK_CTRL3		0x0137
+/* Data Port 3 Registers */
+#define MAX98373_R0300_DP3_INIT_STAT		0x0300
+#define MAX98373_R0301_DP3_INIT_MASK		0x0301
+#define MAX98373_R0302_DP3_PORT_CTRL		0x0302
+#define MAX98373_R0303_DP3_BLOCK_CTRL_1		0x0303
+#define MAX98373_R0304_DP3_PREPARE_STATUS	0x0304
+#define MAX98373_R0305_DP3_PREPARE_CTRL		0x0305
+/* Data Port 3 Bank 0 Registers */
+#define MAX98373_R0320_DP3_CHANNEL_EN		0x0320
+#define MAX98373_R0322_DP3_SAMPLE_CTRL1		0x0322
+#define MAX98373_R0323_DP3_SAMPLE_CTRL2		0x0323
+#define MAX98373_R0324_DP3_OFFSET_CTRL1		0x0324
+#define MAX98373_R0325_DP3_OFFSET_CTRL2		0x0325
+#define MAX98373_R0326_DP3_HCTRL		0x0326
+#define MAX98373_R0327_DP3_BLOCK_CTRL3		0x0327
+/* Data Port 3 Bank 1 Registers */
+#define MAX98373_R0330_DP3_CHANNEL_EN		0x0330
+#define MAX98373_R0332_DP3_SAMPLE_CTRL1		0x0332
+#define MAX98373_R0333_DP3_SAMPLE_CTRL2		0x0333
+#define MAX98373_R0334_DP3_OFFSET_CTRL1		0x0334
+#define MAX98373_R0335_DP3_OFFSET_CTRL2		0x0335
+#define MAX98373_R0336_DP3_HCTRL		0x0336
+#define MAX98373_R0337_DP3_BLOCK_CTRL3		0x0337
+#endif

sound/soc/codecs/max98373.c

@@ -404,6 +404,20 @@ const struct snd_soc_component_driver soc_codec_dev_max98373 = {
 };
 EXPORT_SYMBOL_GPL(soc_codec_dev_max98373);
 
+const struct snd_soc_component_driver soc_codec_dev_max98373_sdw = {
+	.probe			= NULL,
+	.controls		= max98373_snd_controls,
+	.num_controls		= ARRAY_SIZE(max98373_snd_controls),
+	.dapm_widgets		= max98373_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(max98373_dapm_widgets),
+	.dapm_routes		= max98373_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(max98373_audio_map),
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_max98373_sdw);
+
 void max98373_slot_config(struct device *dev,
 			  struct max98373_priv *max98373)
 {

sound/soc/codecs/max98373.h

@@ -212,9 +212,16 @@ struct max98373_priv {
 	bool interleave_mode;
 	unsigned int ch_size;
 	bool tdm_mode;
+	/* variables to support soundwire */
+	struct sdw_slave *slave;
+	bool hw_init;
+	bool pm_init_once;
+	int slot;
+	unsigned int rx_mask;
 };
 
 extern const struct snd_soc_component_driver soc_codec_dev_max98373;
+extern const struct snd_soc_component_driver soc_codec_dev_max98373_sdw;
 
 void max98373_reset(struct max98373_priv *max98373, struct device *dev);
 void max98373_slot_config(struct device *dev,