ASoC: codecs: add support for the TI SRC4392 codec

The src4xxx keyword is used for	future capability to integrate
other codecs similar to the src4392 to the same	code base.
Signed-off-by: Matt Flax <flatmax@flatmax.com>
Link: https://lore.kernel.org/r/20220810013213.1544645-1-flatmax@flatmax.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -205,6 +205,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_SIMPLE_AMPLIFIER
 	imply SND_SOC_SIMPLE_MUX
 	imply SND_SOC_SPDIF
+	imply SND_SOC_SRC4XXX_I2C
 	imply SND_SOC_SSM2305
 	imply SND_SOC_SSM2518
 	imply SND_SOC_SSM2602_SPI
@@ -1471,6 +1472,18 @@ config SND_SOC_SIMPLE_MUX
 config SND_SOC_SPDIF
 	tristate "S/PDIF CODEC"
 
+config SND_SOC_SRC4XXX_I2C
+	tristate "Texas Instruments SRC4XXX DIR/DIT and SRC codecs"
+	depends on I2C
+	select SND_SOC_SRC4XXX
+	help
+	  Enable support for the TI SRC4XXX family of codecs. These include the
+	  scr4392 which has digital receivers, transmitters, and
+	  a sample rate converter, including numerous ports.
+
+config SND_SOC_SRC4XXX
+	tristate
+
 config SND_SOC_SSM2305
 	tristate "Analog Devices SSM2305 Class-D Amplifier"
 	help

sound/soc/codecs/Makefile

@@ -231,6 +231,8 @@ snd-soc-sigmadsp-regmap-objs := sigmadsp-regmap.o
 snd-soc-si476x-objs := si476x.o
 snd-soc-spdif-tx-objs := spdif_transmitter.o
 snd-soc-spdif-rx-objs := spdif_receiver.o
+snd-soc-src4xxx-objs := src4xxx.o
+snd-soc-src4xxx-i2c-objs := src4xxx-i2c.o
 snd-soc-ssm2305-objs := ssm2305.o
 snd-soc-ssm2518-objs := ssm2518.o
 snd-soc-ssm2602-objs := ssm2602.o
@@ -579,6 +581,8 @@ obj-$(CONFIG_SND_SOC_SIGMADSP_I2C)	+= snd-soc-sigmadsp-i2c.o
 obj-$(CONFIG_SND_SOC_SIGMADSP_REGMAP)	+= snd-soc-sigmadsp-regmap.o
 obj-$(CONFIG_SND_SOC_SI476X)	+= snd-soc-si476x.o
 obj-$(CONFIG_SND_SOC_SPDIF)	+= snd-soc-spdif-rx.o snd-soc-spdif-tx.o
+obj-$(CONFIG_SND_SOC_SRC4XXX)	+= snd-soc-src4xxx.o
+obj-$(CONFIG_SND_SOC_SRC4XXX_I2C)	+= snd-soc-src4xxx-i2c.o
 obj-$(CONFIG_SND_SOC_SSM2305)	+= snd-soc-ssm2305.o
 obj-$(CONFIG_SND_SOC_SSM2518)	+= snd-soc-ssm2518.o
 obj-$(CONFIG_SND_SOC_SSM2602)	+= snd-soc-ssm2602.o

sound/soc/codecs/src4xxx-i2c.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for SRC4XXX codecs
+//
+// Copyright 2021-2022 Deqx Pty Ltd
+// Author: Matt Flax <flatmax@flatmax.com>
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "src4xxx.h"
+
+static int src4xxx_i2c_probe(struct i2c_client *i2c,
+			const struct i2c_device_id *id)
+{
+	return src4xxx_probe(&i2c->dev,
+		devm_regmap_init_i2c(i2c, &src4xxx_regmap_config), NULL);
+}
+
+static const struct i2c_device_id src4xxx_i2c_ids[] = {
+	{ "src4392", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, src4xxx_i2c_ids);
+
+static const struct of_device_id src4xxx_of_match[] = {
+	{ .compatible = "ti,src4392", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, src4xxx_of_match);
+
+
+static struct i2c_driver src4xxx_i2c_driver = {
+	.driver = {
+		.name = "src4xxx",
+		.of_match_table = of_match_ptr(src4xxx_of_match),
+	},
+	.probe = src4xxx_i2c_probe,
+	.id_table = src4xxx_i2c_ids,
+};
+module_i2c_driver(src4xxx_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC SRC4392 CODEC I2C driver");
+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.com>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/src4xxx.h

+// SPDX-License-Identifier: GPL-2.0
+//
+// src4xxx.h  --  SRC4XXX ALSA SoC audio driver
+//
+// Copyright 2021-2022 Deqx Pty Ltd
+// Author: Matt R Flax <flatmax@flatmax.com>
+
+#ifndef __SRC4XXX_H__
+#define __SRC4XXX_H__
+
+#define SRC4XXX_RES_00 0x00
+#define SRC4XXX_PWR_RST_01 0x01
+#define SRC4XXX_RESET 0x80
+#define SRC4XXX_POWER_DOWN 0x00
+#define SRC4XXX_POWER_ENABLE 0x20
+#define SRC4XXX_ENABLE_SRC 0x1
+#define SRC4XXX_ENABLE_SRC_SHIFT 0
+#define SRC4XXX_ENABLE_DIR 0x2
+#define SRC4XXX_ENABLE_DIR_SHIFT 1
+#define SRC4XXX_ENABLE_DIT 0x4
+#define SRC4XXX_ENABLE_DIT_SHIFT 2
+#define SRC4XXX_ENABLE_PORT_B 0x8
+#define SRC4XXX_ENABLE_PORT_B_SHIFT 3
+#define SRC4XXX_ENABLE_PORT_A 0x10
+#define SRC4XXX_ENABLE_PORT_A_SHIFT 4
+
+#define SRC4XXX_PORTA_CTL_03 0x03
+#define SRC4XXX_BUS_MASTER 0x8
+#define SRC4XXX_BUS_LEFT_J 0x0
+#define SRC4XXX_BUS_I2S 0x1
+#define SRC4XXX_BUS_RIGHT_J_16 0x4
+#define SRC4XXX_BUS_RIGHT_J_18 0x5
+#define SRC4XXX_BUS_RIGHT_J_20 0x6
+#define SRC4XXX_BUS_RIGHT_J_24 0x7
+#define SRC4XXX_BUS_FMT_MS_MASK 0xf
+
+#define SRC4XXX_PORTA_CTL_04 0x04
+#define SRC4XXX_MCLK_DIV_MASK 0x3
+
+#define SRC4XXX_BUS_FMT(id) (SRC4XXX_PORTA_CTL_03+2*id)
+#define SRC4XXX_BUS_CLK(id) (SRC4XXX_PORTA_CTL_04+2*id)
+
+#define SRC4XXX_PORTB_CTL_05 0x05
+#define SRC4XXX_PORTB_CTL_06 0x06
+
+#define SRC4XXX_TX_CTL_07 0x07
+#define SRC4XXX_TX_MCLK_DIV_MASK 0x60
+#define SRC4XXX_TX_MCLK_DIV_SHIFT 5
+
+#define SRC4XXX_TX_CTL_08 0x08
+#define SRC4XXX_TX_CTL_09 0x09
+#define SRC4XXX_SRC_DIT_IRQ_MSK_0B 0x0B
+#define SRC4XXX_SRC_BTI_EN 0x01
+#define SRC4XXX_SRC_TSLIP_EN 0x02
+#define SRC4XXX_SRC_DIT_IRQ_MODE_0C 0x0C
+#define SRC4XXX_RCV_CTL_0D 0x0D
+#define SRC4XXX_RXCLK_RXCKI 0x0
+#define SRC4XXX_RXCLK_MCLK 0x8
+#define SRC4XXX_RCV_CTL_0E 0x0E
+#define SRC4XXX_REC_MCLK_EN 0x1
+#define SRC4XXX_PLL2_DIV_0 (0x0<<1)
+#define SRC4XXX_PLL2_DIV_2 (0x1<<1)
+#define SRC4XXX_PLL2_DIV_4 (0x2<<1)
+#define SRC4XXX_PLL2_DIV_8 (0x3<<1)
+#define SRC4XXX_PLL2_LOL 0x8
+#define SRC4XXX_RCV_PLL_0F 0x0F
+#define SRC4XXX_RCV_PLL_10 0x10
+#define SRC4XXX_RCV_PLL_11 0x11
+#define SRC4XXX_RVC_IRQ_MSK_16 0x16
+#define SRC4XXX_RVC_IRQ_MSK_17 0x17
+#define SRC4XXX_RVC_IRQ_MODE_18 0x18
+#define SRC4XXX_RVC_IRQ_MODE_19 0x19
+#define SRC4XXX_RVC_IRQ_MODE_1A 0x1A
+#define SRC4XXX_GPIO_1_1B 0x1B
+#define SRC4XXX_GPIO_2_1C 0x1C
+#define SRC4XXX_GPIO_3_1D 0x1D
+#define SRC4XXX_GPIO_4_1E 0x1E
+#define SRC4XXX_SCR_CTL_2D 0x2D
+#define SRC4XXX_SCR_CTL_2E 0x2E
+#define SRC4XXX_SCR_CTL_2F 0x2F
+#define SRC4XXX_SCR_CTL_30 0x30
+#define SRC4XXX_SCR_CTL_31 0x31
+#define SRC4XXX_PAGE_SEL_7F 0x7F
+
+// read only registers
+#define SRC4XXX_GLOBAL_ITR_STS_02 0x02
+#define SRC4XXX_SRC_DIT_STS_0A 0x0A
+#define SRC4XXX_NON_AUDIO_D_12 0x12
+#define SRC4XXX_RVC_STS_13 0x13
+#define SRC4XXX_RVC_STS_14 0x14
+#define SRC4XXX_RVC_STS_15 0x15
+#define SRC4XXX_SUB_CODE_1F 0x1F
+#define SRC4XXX_SUB_CODE_20 0x20
+#define SRC4XXX_SUB_CODE_21 0x21
+#define SRC4XXX_SUB_CODE_22 0x22
+#define SRC4XXX_SUB_CODE_23 0x23
+#define SRC4XXX_SUB_CODE_24 0x24
+#define SRC4XXX_SUB_CODE_25 0x25
+#define SRC4XXX_SUB_CODE_26 0x26
+#define SRC4XXX_SUB_CODE_27 0x27
+#define SRC4XXX_SUB_CODE_28 0x28
+#define SRC4XXX_PC_PREAMBLE_HI_29 0x29
+#define SRC4XXX_PC_PREAMBLE_LO_2A 0x2A
+#define SRC4XXX_PD_PREAMBLE_HI_2B 0x2B
+#define SRC4XXX_PC_PREAMBLE_LO_2C 0x2C
+#define SRC4XXX_IO_RATIO_32 0x32
+#define SRC4XXX_IO_RATIO_33 0x33
+
+int src4xxx_probe(struct device *dev, struct regmap *regmap,
+		void (*switch_mode)(struct device *dev));
+extern const struct regmap_config src4xxx_regmap_config;
+
+#endif /* __SRC4XXX_H__ */