ASoC: cs530x: Support for cs530x ADCs

Add support for the cs530x family of high performance
ADCs.
Signed-off-by: Paul Handrigan <paulha@opensource.cirrus.com>
Link: https://patch.msgid.link/20240621151757.1661265-3-paulha@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -99,6 +99,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_CS47L90
 	imply SND_SOC_CS47L92
 	imply SND_SOC_CS53L30
+	imply SND_SOC_CS530X_I2C
 	imply SND_SOC_CX20442
 	imply SND_SOC_CX2072X
 	imply SND_SOC_DA7210
@@ -1000,6 +1001,19 @@ config SND_SOC_CS53L30
 	tristate "Cirrus Logic CS53L30 CODEC"
 	depends on I2C
 
+config SND_SOC_CS530X
+	tristate
+
+config SND_SOC_CS530X_I2C
+	tristate "Cirrus Logic CS530x ADCs (I2C)"
+	depends on I2C
+	select REGMAP
+	select REGMAP_I2C
+	select SND_SOC_CS530X
+	help
+	  Enable support for Cirrus Logic CS530X ADCs
+	  with I2C control.
+
 config SND_SOC_CX20442
 	tristate
 	depends on TTY

sound/soc/codecs/Makefile

@@ -107,6 +107,8 @@ snd-soc-cs47l85-y := cs47l85.o
 snd-soc-cs47l90-y := cs47l90.o
 snd-soc-cs47l92-y := cs47l92.o
 snd-soc-cs53l30-y := cs53l30.o
+snd-soc-cs530x-y := cs530x.o
+snd-soc-cs530x-i2c-y := cs530x-i2c.o
 snd-soc-cx20442-y := cx20442.o
 snd-soc-cx2072x-y := cx2072x.o
 snd-soc-da7210-y := da7210.o
@@ -509,6 +511,8 @@ obj-$(CONFIG_SND_SOC_CS47L85)	+= snd-soc-cs47l85.o
 obj-$(CONFIG_SND_SOC_CS47L90)	+= snd-soc-cs47l90.o
 obj-$(CONFIG_SND_SOC_CS47L92)	+= snd-soc-cs47l92.o
 obj-$(CONFIG_SND_SOC_CS53L30)	+= snd-soc-cs53l30.o
+obj-$(CONFIG_SND_SOC_CS530X)	+= snd-soc-cs530x.o
+obj-$(CONFIG_SND_SOC_CS530X_I2C)	+= snd-soc-cs530x-i2c.o
 obj-$(CONFIG_SND_SOC_CX20442)	+= snd-soc-cx20442.o
 obj-$(CONFIG_SND_SOC_CX2072X)	+= snd-soc-cx2072x.o
 obj-$(CONFIG_SND_SOC_DA7210)	+= snd-soc-da7210.o

sound/soc/codecs/cs530x-i2c.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// CS530x CODEC driver
+//
+// Copyright (C) 2024 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+#include "cs530x.h"
+
+static const struct of_device_id cs530x_of_match[] = {
+	{
+		.compatible = "cirrus,cs5302",
+		.data = (void *)CS5302,
+	}, {
+		.compatible = "cirrus,cs5304",
+		.data = (void *)CS5304,
+	}, {
+		.compatible = "cirrus,cs5308",
+		.data = (void *)CS5308,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, cs530x_of_match);
+
+static const struct i2c_device_id cs530x_i2c_id[] = {
+	{ "cs5302", CS5302 },
+	{ "cs5304", CS5304 },
+	{ "cs5308", CS5308 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, cs530x_i2c_id);
+
+static int cs530x_i2c_probe(struct i2c_client *client)
+{
+	struct cs530x_priv *cs530x;
+
+	cs530x = devm_kzalloc(&client->dev, sizeof(*cs530x), GFP_KERNEL);
+	if (!cs530x)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, cs530x);
+
+	cs530x->regmap = devm_regmap_init_i2c(client, &cs530x_regmap);
+	if (IS_ERR(cs530x->regmap))
+		return dev_err_probe(&client->dev, PTR_ERR(cs530x->regmap),
+			      "Failed to allocate register map\n");
+
+	cs530x->devtype = (uintptr_t)i2c_get_match_data(client);
+	cs530x->dev = &client->dev;
+
+	return cs530x_probe(cs530x);
+}
+
+static struct i2c_driver cs530x_i2c_driver = {
+	.driver = {
+		.name = "cs530x",
+		.of_match_table = cs530x_of_match,
+	},
+	.probe = cs530x_i2c_probe,
+	.id_table = cs530x_i2c_id,
+};
+module_i2c_driver(cs530x_i2c_driver);
+
+MODULE_DESCRIPTION("I2C CS530X driver");
+MODULE_IMPORT_NS(SND_SOC_CS530X);
+MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <paulha@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");

sound/soc/codecs/cs530x.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * CS530x CODEC driver internal data
+ *
+ * Copyright (C) 2023-2024 Cirrus Logic, Inc. and
+ *                         Cirrus Logic International Semiconductor Ltd.
+ */
+
+#ifndef _CS530X_H
+#define _CS530X_H
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+/* Devices */
+#define CS530X_2CH_ADC_DEV_ID		 0x5302
+#define CS530X_4CH_ADC_DEV_ID		 0x5304
+#define CS530X_8CH_ADC_DEV_ID		 0x5308
+
+/* Registers */
+
+#define CS530X_DEVID			0x0000000
+#define CS530X_REVID			0x0000004
+#define CS530X_SW_RESET			0x0000022
+
+#define CS530X_CLK_CFG_0		0x0000040
+#define CS530X_CLK_CFG_1		0x0000042
+#define CS530X_CHIP_ENABLE		0x0000044
+#define CS530X_ASP_CFG			0x0000048
+#define CS530X_SIGNAL_PATH_CFG		0x0000050
+#define CS530X_IN_ENABLES		0x0000080
+#define CS530X_IN_RAMP_SUM		0x0000082
+#define CS530X_IN_FILTER		0x0000086
+#define CS530X_IN_HIZ			0x0000088
+#define CS530X_IN_INV			0x000008A
+#define CS530X_IN_VOL_CTRL1_0	        0x0000090
+#define CS530X_IN_VOL_CTRL1_1	        0x0000092
+#define CS530X_IN_VOL_CTRL2_0	        0x0000094
+#define CS530X_IN_VOL_CTRL2_1	        0x0000096
+#define CS530X_IN_VOL_CTRL3_0	        0x0000098
+#define CS530X_IN_VOL_CTRL3_1	        0x000009A
+#define CS530X_IN_VOL_CTRL4_0	        0x000009C
+#define CS530X_IN_VOL_CTRL4_1	        0x000009E
+#define CS530X_IN_VOL_CTRL5		0x00000A0
+
+#define CS530X_PAD_FN			0x0003D24
+#define CS530X_PAD_LVL			0x0003D28
+
+#define CS530X_MAX_REGISTER		CS530X_PAD_LVL
+
+/* Register Fields */
+
+/* REVID */
+#define CS530X_MTLREVID			GENMASK(3, 0)
+#define CS530X_AREVID			GENMASK(7, 4)
+
+/* SW_RESET */
+#define CS530X_SW_RST_SHIFT		8
+#define CS530X_SW_RST_VAL		(0x5A << CS530X_SW_RST_SHIFT)
+
+/* CLK_CFG_0 */
+#define CS530X_PLL_REFCLK_SRC_MASK	BIT(0)
+#define CS530X_PLL_REFCLK_FREQ_MASK	GENMASK(5, 4)
+#define CS530X_SYSCLK_SRC_MASK		BIT(12)
+#define CS530X_SYSCLK_SRC_SHIFT		12
+#define CS530X_REFCLK_2P822_3P072	0
+#define CS530X_REFCLK_5P6448_6P144	0x10
+#define CS530X_REFCLK_11P2896_12P288	0x20
+#define CS530X_REFCLK_24P5792_24P576	0x30
+
+/* CLK_CFG_1 */
+#define CS530X_SAMPLE_RATE_MASK		GENMASK(2, 0)
+#define CS530X_FS_32K			0
+#define CS530X_FS_48K_44P1K		1
+#define CS530X_FS_96K_88P2K		2
+#define CS530X_FS_192K_176P4K		3
+#define CS530X_FS_384K_356P8K		4
+#define CS530X_FS_768K_705P6K		5
+
+/* CHIP_ENABLE */
+#define CS530X_GLOBAL_EN		BIT(0)
+
+/* ASP_CFG */
+#define CS530X_ASP_BCLK_FREQ_MASK	GENMASK(1, 0)
+#define CS530X_ASP_PRIMARY		BIT(5)
+#define CS530X_ASP_BCLK_INV		BIT(6)
+#define CS530X_BCLK_2P822_3P072		0
+#define CS530X_BCLK_5P6448_6P144	1
+#define CS530X_BCLK_11P2896_12P288	2
+#define CS530X_BCLK_24P5792_24P576	3
+
+/* SIGNAL_PATH_CFG */
+#define CS530X_ASP_FMT_MASK		GENMASK(2, 0)
+#define CS530X_ASP_TDM_SLOT_MASK	GENMASK(5, 3)
+#define CS530X_ASP_TDM_SLOT_SHIFT	3
+#define CS530X_ASP_CH_REVERSE		BIT(9)
+#define CS530X_ASP_FMT_I2S		0
+#define CS530X_ASP_FMT_LJ		1
+#define CS530X_ASP_FMT_DSP_A		0x6
+
+/* TDM Slots */
+#define CS530X_0_1_TDM_SLOT_MASK	GENMASK(1, 0)
+#define CS530X_0_3_TDM_SLOT_MASK	GENMASK(3, 0)
+#define CS530X_0_7_TDM_SLOT_MASK	GENMASK(7, 0)
+#define CS530X_0_7_TDM_SLOT_VAL		0
+
+#define CS530X_2_3_TDM_SLOT_MASK	GENMASK(3, 2)
+#define CS530X_2_3_TDM_SLOT_VAL		1
+
+#define CS530X_4_5_TDM_SLOT_MASK	GENMASK(5, 4)
+#define CS530X_4_7_TDM_SLOT_MASK	GENMASK(7, 4)
+#define CS530X_4_7_TDM_SLOT_VAL		2
+
+#define CS530X_6_7_TDM_SLOT_MASK	GENMASK(7, 6)
+#define CS530X_6_7_TDM_SLOT_VAL		3
+
+#define CS530X_8_9_TDM_SLOT_MASK	GENMASK(9, 8)
+#define CS530X_8_11_TDM_SLOT_MASK	GENMASK(11, 8)
+#define CS530X_8_15_TDM_SLOT_MASK	GENMASK(15, 8)
+#define CS530X_8_15_TDM_SLOT_VAL	4
+
+#define CS530X_10_11_TDM_SLOT_MASK	GENMASK(11, 10)
+#define CS530X_10_11_TDM_SLOT_VAL	5
+
+#define CS530X_12_13_TDM_SLOT_MASK	GENMASK(13, 12)
+#define CS530X_12_15_TDM_SLOT_MASK	GENMASK(15, 12)
+#define CS530X_12_15_TDM_SLOT_VAL	6
+
+#define CS530X_14_15_TDM_SLOT_MASK	GENMASK(15, 14)
+#define CS530X_14_15_TDM_SLOT_VAL	7
+
+/* IN_RAMP_SUM */
+#define CS530X_RAMP_RATE_INC_SHIFT	0
+#define CS530X_RAMP_RATE_DEC_SHIFT	4
+#define CS530X_IN_SUM_MODE_SHIFT	13
+
+/* IN_FILTER */
+#define CS530X_IN_FILTER_SHIFT		8
+#define CS530X_IN_HPF_EN_SHIFT		12
+
+/* IN_HIZ */
+#define CS530X_IN12_HIZ			BIT(0)
+#define CS530X_IN34_HIZ			BIT(1)
+#define CS530X_IN56_HIZ			BIT(2)
+#define CS530X_IN78_HIZ			BIT(3)
+
+/* IN_INV */
+#define CS530X_IN1_INV_SHIFT		0
+#define CS530X_IN2_INV_SHIFT		1
+#define CS530X_IN3_INV_SHIFT		2
+#define CS530X_IN4_INV_SHIFT		3
+#define CS530X_IN5_INV_SHIFT		4
+#define CS530X_IN6_INV_SHIFT		5
+#define CS530X_IN7_INV_SHIFT		6
+#define CS530X_IN8_INV_SHIFT		7
+
+/* IN_VOL_CTLy_z */
+#define CS530X_IN_MUTE			BIT(15)
+
+/* IN_VOL_CTL5 */
+#define CS530X_IN_VU			BIT(0)
+
+/* PAD_FN */
+#define CS530X_DOUT2_FN			BIT(0)
+#define CS530X_DOUT3_FN			BIT(1)
+#define CS530X_DOUT4_FN			BIT(2)
+#define CS530X_SPI_CS_FN		BIT(3)
+#define CS530X_CONFIG2_FN		BIT(6)
+#define CS530X_CONFIG3_FN		BIT(7)
+#define CS530X_CONFIG4_FN		BIT(8)
+#define CS530X_CONFIG5_FN		BIT(9)
+
+/* PAD_LVL */
+#define CS530X_CONFIG2_LVL		BIT(6)
+#define CS530X_CONFIG3_LVL		BIT(7)
+#define CS530X_CONFIG4_LVL		BIT(8)
+#define CS530X_CONFIG5_LVL		BIT(9)
+
+/* System Clock Source */
+#define CS530X_SYSCLK_SRC_MCLK		0
+#define CS530X_SYSCLK_SRC_PLL		1
+
+/* PLL Reference Clock Source */
+#define CS530X_PLL_SRC_BCLK		0
+#define CS530X_PLL_SRC_MCLK		1
+
+#define CS530X_NUM_SUPPLIES		2
+
+enum cs530x_type {
+	CS5302,
+	CS5304,
+	CS5308,
+};
+
+/* codec private data */
+struct cs530x_priv {
+	struct regmap *regmap;
+	struct device *dev;
+	struct snd_soc_dai_driver *dev_dai;
+
+	enum cs530x_type devtype;
+	int num_adcs;
+	int num_dacs;
+
+	struct regulator_bulk_data supplies[CS530X_NUM_SUPPLIES];
+
+	unsigned int mclk_rate;
+
+	int tdm_width;
+	int tdm_slots;
+	int bclk;
+	int fs;
+	int adc_pairs_count;
+
+	struct gpio_desc *reset_gpio;
+};
+
+extern const struct regmap_config cs530x_regmap;
+int cs530x_probe(struct cs530x_priv *cs530x);
+
+#endif