This patch adds support for the ADAU1977, ADAU1978 and ADAU1979 audio CODEC
devices. They are a family of 4-channel differential input audio ADC devices.
They can be connected to either a SPI or I2C bus. The driver is implemented in
three modules, one main module (adau1977.ko) which implements the device logic
and one module each for SPI (adau1977-spi.ko) and I2C (adau1977-i2c.ko) bus
access.
Signed-off-by: Lars-Peter Clausen <lars(a)metafoo.de>
---
Changes since v1:
* Split out devicetree support into a separate patch. Will be submitted
after this has been merged.
* gpiod_set_value -> gpiod_set_value_cansleep
* Split adau1977_set_power() into adau1977_disable_power() and
adau1977_enable_power() as most of the code for those two cases was on
different paths and was a bit hard to follow due to both being
implemented in the same function.
* Moved duplicated rate to FS field setting lookup to separate helper
function.
* Drop 'if (stream == SNDRV_PCM_STREAM_PLAYBACK) ...' in adau1977_mute()
since the core should make sure that this never happens
---
include/linux/platform_data/adau1977.h | 45 ++
sound/soc/codecs/Kconfig | 15 +
sound/soc/codecs/Makefile | 6 +
sound/soc/codecs/adau1977-i2c.c | 59 ++
sound/soc/codecs/adau1977-spi.c | 76 +++
sound/soc/codecs/adau1977.c | 1018 ++++++++++++++++++++++++++++++++
sound/soc/codecs/adau1977.h | 37 ++
7 files changed, 1256 insertions(+)
create mode 100644 include/linux/platform_data/adau1977.h
create mode 100644 sound/soc/codecs/adau1977-i2c.c
create mode 100644 sound/soc/codecs/adau1977-spi.c
create mode 100644 sound/soc/codecs/adau1977.c
create mode 100644 sound/soc/codecs/adau1977.h
diff --git a/include/linux/platform_data/adau1977.h b/include/linux/platform_data/adau1977.h
new file mode 100644
index 0000000..bed11d9
--- /dev/null
+++ b/include/linux/platform_data/adau1977.h
@@ -0,0 +1,45 @@
+/*
+ * ADAU1977/ADAU1978/ADAU1979 driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars(a)metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef __LINUX_PLATFORM_DATA_ADAU1977_H__
+#define __LINUX_PLATFORM_DATA_ADAU1977_H__
+
+/**
+ * enum adau1977_micbias - ADAU1977 MICBIAS pin voltage setting
+ * @ADAU1977_MICBIAS_5V0: MICBIAS is set to 5.0 V
+ * @ADAU1977_MICBIAS_5V5: MICBIAS is set to 5.5 V
+ * @ADAU1977_MICBIAS_6V0: MICBIAS is set to 6.0 V
+ * @ADAU1977_MICBIAS_6V5: MICBIAS is set to 6.5 V
+ * @ADAU1977_MICBIAS_7V0: MICBIAS is set to 7.0 V
+ * @ADAU1977_MICBIAS_7V5: MICBIAS is set to 7.5 V
+ * @ADAU1977_MICBIAS_8V0: MICBIAS is set to 8.0 V
+ * @ADAU1977_MICBIAS_8V5: MICBIAS is set to 8.5 V
+ * @ADAU1977_MICBIAS_9V0: MICBIAS is set to 9.0 V
+ */
+enum adau1977_micbias {
+ ADAU1977_MICBIAS_5V0 = 0x0,
+ ADAU1977_MICBIAS_5V5 = 0x1,
+ ADAU1977_MICBIAS_6V0 = 0x2,
+ ADAU1977_MICBIAS_6V5 = 0x3,
+ ADAU1977_MICBIAS_7V0 = 0x4,
+ ADAU1977_MICBIAS_7V5 = 0x5,
+ ADAU1977_MICBIAS_8V0 = 0x6,
+ ADAU1977_MICBIAS_8V5 = 0x7,
+ ADAU1977_MICBIAS_9V0 = 0x8,
+};
+
+/**
+ * struct adau1977_platform_data - Platform configuration data for the ADAU1977
+ * @micbias: Specifies the voltage for the MICBIAS pin
+ */
+struct adau1977_platform_data {
+ enum adau1977_micbias micbias;
+};
+
+#endif
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index fee1f64..9a5f85e 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -24,6 +24,8 @@ config SND_SOC_ALL_CODECS
select SND_SOC_ADAU1373 if I2C
select SND_SOC_ADAV801 if SPI_MASTER
select SND_SOC_ADAV803 if I2C
+ select SND_SOC_ADAU1977_SPI if SPI_MASTER
+ select SND_SOC_ADAU1977_I2C if I2C
select SND_SOC_ADAU1701 if I2C
select SND_SOC_ADS117X
select SND_SOC_AK4104 if SPI_MASTER
@@ -202,6 +204,19 @@ config SND_SOC_ADAU1701
config SND_SOC_ADAU1373
tristate
+config SND_SOC_ADAU1977
+ tristate
+
+config SND_SOC_ADAU1977_SPI
+ tristate
+ select SND_SOC_ADAU1977
+ select REGMAP_SPI
+
+config SND_SOC_ADAU1977_I2C
+ tristate
+ select SND_SOC_ADAU1977
+ select REGMAP_I2C
+
config SND_SOC_ADAV80X
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index eeb2f91..12dc02c 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -7,6 +7,9 @@ snd-soc-ad1980-objs := ad1980.o
snd-soc-ad73311-objs := ad73311.o
snd-soc-adau1701-objs := adau1701.o
snd-soc-adau1373-objs := adau1373.o
+snd-soc-adau1977-objs := adau1977.o
+snd-soc-adau1977-spi-objs := adau1977-spi.o
+snd-soc-adau1977-i2c-objs := adau1977-i2c.o
snd-soc-adav80x-objs := adav80x.o
snd-soc-adav801-objs := adav801.o
snd-soc-adav803-objs := adav803.o
@@ -142,6 +145,9 @@ obj-$(CONFIG_SND_SOC_AD193X) += snd-soc-ad193x.o
obj-$(CONFIG_SND_SOC_AD1980) += snd-soc-ad1980.o
obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
obj-$(CONFIG_SND_SOC_ADAU1373) += snd-soc-adau1373.o
+obj-$(CONFIG_SND_SOC_ADAU1977) += snd-soc-adau1977.o
+obj-$(CONFIG_SND_SOC_ADAU1977_SPI) += snd-soc-adau1977-spi.o
+obj-$(CONFIG_SND_SOC_ADAU1977_I2C) += snd-soc-adau1977-i2c.o
obj-$(CONFIG_SND_SOC_ADAU1701) += snd-soc-adau1701.o
obj-$(CONFIG_SND_SOC_ADAV80X) += snd-soc-adav80x.o
obj-$(CONFIG_SND_SOC_ADAV801) += snd-soc-adav801.o
diff --git a/sound/soc/codecs/adau1977-i2c.c b/sound/soc/codecs/adau1977-i2c.c
new file mode 100644
index 0000000..9700e8c
--- /dev/null
+++ b/sound/soc/codecs/adau1977-i2c.c
@@ -0,0 +1,59 @@
+/*
+ * ADAU1977/ADAU1978/ADAU1979 driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars(a)metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+
+#include "adau1977.h"
+
+static int adau1977_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct regmap_config config;
+
+ config = adau1977_regmap_config;
+ config.val_bits = 8;
+ config.reg_bits = 8;
+
+ return adau1977_probe(&client->dev,
+ devm_regmap_init_i2c(client, &config),
+ id->driver_data, NULL);
+}
+
+static int adau1977_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id adau1977_i2c_ids[] = {
+ { "adau1977", ADAU1977 },
+ { "adau1978", ADAU1978 },
+ { "adau1979", ADAU1978 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adau1977_i2c_ids);
+
+static struct i2c_driver adau1977_i2c_driver = {
+ .driver = {
+ .name = "adau1977",
+ .owner = THIS_MODULE,
+ },
+ .probe = adau1977_i2c_probe,
+ .remove = adau1977_i2c_remove,
+ .id_table = adau1977_i2c_ids,
+};
+module_i2c_driver(adau1977_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1977/ADAU1978/ADAU1979 driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars(a)metafoo.de>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/adau1977-spi.c b/sound/soc/codecs/adau1977-spi.c
new file mode 100644
index 0000000..b05cf5d
--- /dev/null
+++ b/sound/soc/codecs/adau1977-spi.c
@@ -0,0 +1,76 @@
+/*
+ * ADAU1977/ADAU1978/ADAU1979 driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars(a)metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <sound/soc.h>
+
+#include "adau1977.h"
+
+static void adau1977_spi_switch_mode(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ /*
+ * To get the device into SPI mode CLATCH has to be pulled low three
+ * times. Do this by issuing three dummy reads.
+ */
+ spi_w8r8(spi, 0x00);
+ spi_w8r8(spi, 0x00);
+ spi_w8r8(spi, 0x00);
+}
+
+static int adau1977_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct regmap_config config;
+
+ if (!id)
+ return -EINVAL;
+
+ config = adau1977_regmap_config;
+ config.val_bits = 8;
+ config.reg_bits = 16;
+ config.read_flag_mask = 0x1;
+
+ return adau1977_probe(&spi->dev,
+ devm_regmap_init_spi(spi, &config),
+ id->driver_data, adau1977_spi_switch_mode);
+}
+
+static int adau1977_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ return 0;
+}
+
+static const struct spi_device_id adau1977_spi_ids[] = {
+ { "adau1977", ADAU1977 },
+ { "adau1978", ADAU1978 },
+ { "adau1979", ADAU1978 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, adau1977_spi_ids);
+
+static struct spi_driver adau1977_spi_driver = {
+ .driver = {
+ .name = "adau1977",
+ .owner = THIS_MODULE,
+ },
+ .probe = adau1977_spi_probe,
+ .remove = adau1977_spi_remove,
+ .id_table = adau1977_spi_ids,
+};
+module_spi_driver(adau1977_spi_driver);
+
+MODULE_DESCRIPTION("ASoC ADAU1977/ADAU1978/ADAU1979 driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars(a)metafoo.de>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/adau1977.c b/sound/soc/codecs/adau1977.c
new file mode 100644
index 0000000..fd55da7
--- /dev/null
+++ b/sound/soc/codecs/adau1977.c
@@ -0,0 +1,1018 @@
+/*
+ * ADAU1977/ADAU1978/ADAU1979 driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars(a)metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_data/adau1977.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#include "adau1977.h"
+
+#define ADAU1977_REG_POWER 0x00
+#define ADAU1977_REG_PLL 0x01
+#define ADAU1977_REG_BOOST 0x02
+#define ADAU1977_REG_MICBIAS 0x03
+#define ADAU1977_REG_BLOCK_POWER_SAI 0x04
+#define ADAU1977_REG_SAI_CTRL0 0x05
+#define ADAU1977_REG_SAI_CTRL1 0x06
+#define ADAU1977_REG_CMAP12 0x07
+#define ADAU1977_REG_CMAP34 0x08
+#define ADAU1977_REG_SAI_OVERTEMP 0x09
+#define ADAU1977_REG_POST_ADC_GAIN(x) (0x0a + (x))
+#define ADAU1977_REG_MISC_CONTROL 0x0e
+#define ADAU1977_REG_DIAG_CONTROL 0x10
+#define ADAU1977_REG_STATUS(x) (0x11 + (x))
+#define ADAU1977_REG_DIAG_IRQ1 0x15
+#define ADAU1977_REG_DIAG_IRQ2 0x16
+#define ADAU1977_REG_ADJUST1 0x17
+#define ADAU1977_REG_ADJUST2 0x18
+#define ADAU1977_REG_ADC_CLIP 0x19
+#define ADAU1977_REG_DC_HPF_CAL 0x1a
+
+#define ADAU1977_POWER_RESET BIT(7)
+#define ADAU1977_POWER_PWUP BIT(0)
+
+#define ADAU1977_PLL_CLK_S BIT(4)
+#define ADAU1977_PLL_MCS_MASK 0x7
+
+#define ADAU1977_MICBIAS_MB_VOLTS_MASK 0xf0
+#define ADAU1977_MICBIAS_MB_VOLTS_OFFSET 4
+
+#define ADAU1977_BLOCK_POWER_SAI_LR_POL BIT(7)
+#define ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE BIT(6)
+#define ADAU1977_BLOCK_POWER_SAI_LDO_EN BIT(5)
+
+#define ADAU1977_SAI_CTRL0_FMT_MASK (0x3 << 6)
+#define ADAU1977_SAI_CTRL0_FMT_I2S (0x0 << 6)
+#define ADAU1977_SAI_CTRL0_FMT_LJ (0x1 << 6)
+#define ADAU1977_SAI_CTRL0_FMT_RJ_24BIT (0x2 << 6)
+#define ADAU1977_SAI_CTRL0_FMT_RJ_16BIT (0x3 << 6)
+
+#define ADAU1977_SAI_CTRL0_SAI_MASK (0x7 << 3)
+#define ADAU1977_SAI_CTRL0_SAI_I2S (0x0 << 3)
+#define ADAU1977_SAI_CTRL0_SAI_TDM_2 (0x1 << 3)
+#define ADAU1977_SAI_CTRL0_SAI_TDM_4 (0x2 << 3)
+#define ADAU1977_SAI_CTRL0_SAI_TDM_8 (0x3 << 3)
+#define ADAU1977_SAI_CTRL0_SAI_TDM_16 (0x4 << 3)
+
+#define ADAU1977_SAI_CTRL0_FS_MASK (0x7)
+#define ADAU1977_SAI_CTRL0_FS_8000_12000 (0x0)
+#define ADAU1977_SAI_CTRL0_FS_16000_24000 (0x1)
+#define ADAU1977_SAI_CTRL0_FS_32000_48000 (0x2)
+#define ADAU1977_SAI_CTRL0_FS_64000_96000 (0x3)
+#define ADAU1977_SAI_CTRL0_FS_128000_192000 (0x4)
+
+#define ADAU1977_SAI_CTRL1_SLOT_WIDTH_MASK (0x3 << 5)
+#define ADAU1977_SAI_CTRL1_SLOT_WIDTH_32 (0x0 << 5)
+#define ADAU1977_SAI_CTRL1_SLOT_WIDTH_24 (0x1 << 5)
+#define ADAU1977_SAI_CTRL1_SLOT_WIDTH_16 (0x2 << 5)
+#define ADAU1977_SAI_CTRL1_DATA_WIDTH_MASK (0x1 << 4)
+#define ADAU1977_SAI_CTRL1_DATA_WIDTH_16BIT (0x1 << 4)
+#define ADAU1977_SAI_CTRL1_DATA_WIDTH_24BIT (0x0 << 4)
+#define ADAU1977_SAI_CTRL1_LRCLK_PULSE BIT(3)
+#define ADAU1977_SAI_CTRL1_MSB BIT(2)
+#define ADAU1977_SAI_CTRL1_BCLKRATE_16 (0x1 << 1)
+#define ADAU1977_SAI_CTRL1_BCLKRATE_32 (0x0 << 1)
+#define ADAU1977_SAI_CTRL1_BCLKRATE_MASK (0x1 << 1)
+#define ADAU1977_SAI_CTRL1_MASTER BIT(0)
+
+#define ADAU1977_SAI_OVERTEMP_DRV_C(x) BIT(4 + (x))
+#define ADAU1977_SAI_OVERTEMP_DRV_HIZ BIT(3)
+
+#define ADAU1977_MISC_CONTROL_SUM_MODE_MASK (0x3 << 6)
+#define ADAU1977_MISC_CONTROL_SUM_MODE_1CH (0x2 << 6)
+#define ADAU1977_MISC_CONTROL_SUM_MODE_2CH (0x1 << 6)
+#define ADAU1977_MISC_CONTROL_SUM_MODE_4CH (0x0 << 6)
+#define ADAU1977_MISC_CONTROL_MMUTE BIT(4)
+#define ADAU1977_MISC_CONTROL_DC_CAL BIT(0)
+
+#define ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET 4
+#define ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET 0
+
+struct adau1977 {
+ struct regmap *regmap;
+ bool right_j;
+ unsigned int sysclk;
+ enum adau1977_sysclk_src sysclk_src;
+ struct gpio_desc *reset_gpio;
+ enum adau1977_type type;
+
+ struct regulator *avdd_reg;
+ struct regulator *dvdd_reg;
+
+ struct snd_pcm_hw_constraint_list constraints;
+
+ struct device *dev;
+ void (*switch_mode)(struct device *dev);
+
+ unsigned int max_master_fs;
+ unsigned int slot_width;
+ bool enabled;
+ bool master;
+};
+
+static const struct reg_default adau1977_reg_defaults[] = {
+ { 0x00, 0x00 },
+ { 0x01, 0x41 },
+ { 0x02, 0x4a },
+ { 0x03, 0x7d },
+ { 0x04, 0x3d },
+ { 0x05, 0x02 },
+ { 0x06, 0x00 },
+ { 0x07, 0x10 },
+ { 0x08, 0x32 },
+ { 0x09, 0xf0 },
+ { 0x0a, 0xa0 },
+ { 0x0b, 0xa0 },
+ { 0x0c, 0xa0 },
+ { 0x0d, 0xa0 },
+ { 0x0e, 0x02 },
+ { 0x10, 0x0f },
+ { 0x15, 0x20 },
+ { 0x16, 0x00 },
+ { 0x17, 0x00 },
+ { 0x18, 0x00 },
+ { 0x1a, 0x00 },
+};
+
+static const DECLARE_TLV_DB_MINMAX_MUTE(adau1977_adc_gain, -3562, 6000);
+
+static const struct snd_soc_dapm_widget adau1977_micbias_dapm_widgets[] = {
+ SND_SOC_DAPM_SUPPLY("MICBIAS", ADAU1977_REG_MICBIAS,
+ 3, 0, NULL, 0)
+};
+
+static const struct snd_soc_dapm_widget adau1977_dapm_widgets[] = {
+ SND_SOC_DAPM_SUPPLY("Vref", ADAU1977_REG_BLOCK_POWER_SAI,
+ 4, 0, NULL, 0),
+
+ SND_SOC_DAPM_ADC("ADC1", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 0, 0),
+ SND_SOC_DAPM_ADC("ADC2", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 1, 0),
+ SND_SOC_DAPM_ADC("ADC3", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 2, 0),
+ SND_SOC_DAPM_ADC("ADC4", "Capture", ADAU1977_REG_BLOCK_POWER_SAI, 3, 0),
+
+ SND_SOC_DAPM_INPUT("AIN1"),
+ SND_SOC_DAPM_INPUT("AIN2"),
+ SND_SOC_DAPM_INPUT("AIN3"),
+ SND_SOC_DAPM_INPUT("AIN4"),
+
+ SND_SOC_DAPM_OUTPUT("VREF"),
+};
+
+static const struct snd_soc_dapm_route adau1977_dapm_routes[] = {
+ { "ADC1", NULL, "AIN1" },
+ { "ADC2", NULL, "AIN2" },
+ { "ADC3", NULL, "AIN3" },
+ { "ADC4", NULL, "AIN4" },
+
+ { "ADC1", NULL, "Vref" },
+ { "ADC2", NULL, "Vref" },
+ { "ADC3", NULL, "Vref" },
+ { "ADC4", NULL, "Vref" },
+
+ { "VREF", NULL, "Vref" },
+};
+
+#define ADAU1977_VOLUME(x) \
+ SOC_SINGLE_TLV("ADC" #x " Capture Volume", \
+ ADAU1977_REG_POST_ADC_GAIN((x) - 1), \
+ 0, 255, 1, adau1977_adc_gain)
+
+#define ADAU1977_HPF_SWITCH(x) \
+ SOC_SINGLE("ADC" #x " Highpass-Filter Capture Switch", \
+ ADAU1977_REG_DC_HPF_CAL, (x) - 1, 1, 0)
+
+#define ADAU1977_DC_SUB_SWITCH(x) \
+ SOC_SINGLE("ADC" #x " DC Substraction Capture Switch", \
+ ADAU1977_REG_DC_HPF_CAL, (x) + 3, 1, 0)
+
+static const struct snd_kcontrol_new adau1977_snd_controls[] = {
+ ADAU1977_VOLUME(1),
+ ADAU1977_VOLUME(2),
+ ADAU1977_VOLUME(3),
+ ADAU1977_VOLUME(4),
+
+ ADAU1977_HPF_SWITCH(1),
+ ADAU1977_HPF_SWITCH(2),
+ ADAU1977_HPF_SWITCH(3),
+ ADAU1977_HPF_SWITCH(4),
+
+ ADAU1977_DC_SUB_SWITCH(1),
+ ADAU1977_DC_SUB_SWITCH(2),
+ ADAU1977_DC_SUB_SWITCH(3),
+ ADAU1977_DC_SUB_SWITCH(4),
+};
+
+static int adau1977_reset(struct adau1977 *adau1977)
+{
+ int ret;
+
+ /*
+ * The reset bit is obviously volatile, but we need to be able to cache
+ * the other bits in the register, so we can't just mark the whole
+ * register as volatile. Since this is the only place where we'll ever
+ * touch the reset bit just bypass the cache for this operation.
+ */
+ regcache_cache_bypass(adau1977->regmap, true);
+ ret = regmap_write(adau1977->regmap, ADAU1977_REG_POWER,
+ ADAU1977_POWER_RESET);
+ regcache_cache_bypass(adau1977->regmap, false);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+/*
+ * Returns the appropriate setting for ths FS field in the CTRL0 register
+ * depending on the rate.
+ */
+static int adau1977_lookup_fs(unsigned int rate)
+{
+ if (rate >= 8000 && rate <= 12000)
+ return ADAU1977_SAI_CTRL0_FS_8000_12000;
+ else if (rate >= 16000 && rate <= 24000)
+ return ADAU1977_SAI_CTRL0_FS_16000_24000;
+ else if (rate >= 32000 && rate <= 48000)
+ return ADAU1977_SAI_CTRL0_FS_32000_48000;
+ else if (rate >= 64000 && rate <= 96000)
+ return ADAU1977_SAI_CTRL0_FS_64000_96000;
+ else if (rate >= 128000 && rate <= 192000)
+ return ADAU1977_SAI_CTRL0_FS_128000_192000;
+ else
+ return -EINVAL;
+}
+
+static int adau1977_lookup_mcs(struct adau1977 *adau1977, unsigned int rate,
+ unsigned int fs)
+{
+ unsigned int mcs;
+
+ /*
+ * rate = sysclk / (512 * mcs_lut[mcs]) * 2**fs
+ * => mcs_lut[mcs] = sysclk / (512 * rate) * 2**fs
+ * => mcs_lut[mcs] = sysclk / ((512 / 2**fs) * rate)
+ */
+
+ rate *= 512 >> fs;
+
+ if (adau1977->sysclk % rate != 0)
+ return -EINVAL;
+
+ mcs = adau1977->sysclk / rate;
+
+ /* The factors configured by MCS are 1, 2, 3, 4, 6 */
+ if (mcs < 1 || mcs > 6 || mcs == 5)
+ return -EINVAL;
+
+ mcs = mcs - 1;
+ if (mcs == 5)
+ mcs = 4;
+
+ return mcs;
+}
+
+static int adau1977_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(codec);
+ unsigned int rate = params_rate(params);
+ unsigned int slot_width;
+ unsigned int ctrl0, ctrl0_mask;
+ unsigned int ctrl1;
+ int mcs, fs;
+ int ret;
+
+ fs = adau1977_lookup_fs(rate);
+ if (fs < 0)
+ return fs;
+
+ if (adau1977->sysclk_src == ADAU1977_SYSCLK_SRC_MCLK) {
+ mcs = adau1977_lookup_mcs(adau1977, rate, fs);
+ if (mcs < 0)
+ return mcs;
+ } else {
+ mcs = 0;
+ }
+
+ ctrl0_mask = ADAU1977_SAI_CTRL0_FS_MASK;
+ ctrl0 = fs;
+
+ if (adau1977->right_j) {
+ switch (params_width(params)) {
+ case 16:
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_16BIT;
+ break;
+ case 24:
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_24BIT;
+ break;
+ default:
+ return -EINVAL;
+ }
+ ctrl0_mask |= ADAU1977_SAI_CTRL0_FMT_MASK;
+ }
+
+ if (adau1977->master) {
+ switch (params_width(params)) {
+ case 16:
+ ctrl1 = ADAU1977_SAI_CTRL1_DATA_WIDTH_16BIT;
+ slot_width = 16;
+ break;
+ case 24:
+ case 32:
+ ctrl1 = ADAU1977_SAI_CTRL1_DATA_WIDTH_24BIT;
+ slot_width = 32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* In TDM mode there is a fixed slot width */
+ if (adau1977->slot_width)
+ slot_width = adau1977->slot_width;
+
+ if (slot_width == 16)
+ ctrl1 |= ADAU1977_SAI_CTRL1_BCLKRATE_16;
+ else
+ ctrl1 |= ADAU1977_SAI_CTRL1_BCLKRATE_32;
+
+ ret = regmap_update_bits(adau1977->regmap,
+ ADAU1977_REG_SAI_CTRL1,
+ ADAU1977_SAI_CTRL1_DATA_WIDTH_MASK |
+ ADAU1977_SAI_CTRL1_BCLKRATE_MASK,
+ ctrl1);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
+ ctrl0_mask, ctrl0);
+ if (ret < 0)
+ return ret;
+
+ return regmap_update_bits(adau1977->regmap, ADAU1977_REG_PLL,
+ ADAU1977_PLL_MCS_MASK, mcs);
+}
+
+static int adau1977_power_disable(struct adau1977 *adau1977)
+{
+ int ret = 0;
+
+ if (!adau1977->enabled)
+ return 0;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_POWER,
+ ADAU1977_POWER_PWUP, 0);
+ if (ret)
+ return ret;
+
+ regcache_mark_dirty(adau1977->regmap);
+
+ if (adau1977->reset_gpio)
+ gpiod_set_value_cansleep(adau1977->reset_gpio, 0);
+
+ regcache_cache_only(adau1977->regmap, true);
+
+ regulator_disable(adau1977->avdd_reg);
+ if (adau1977->dvdd_reg)
+ regulator_disable(adau1977->dvdd_reg);
+
+ adau1977->enabled = false;
+
+ return 0;
+}
+
+static int adau1977_power_enable(struct adau1977 *adau1977)
+{
+ unsigned int val;
+ int ret = 0;
+
+ if (adau1977->enabled)
+ return 0;
+
+ ret = regulator_enable(adau1977->avdd_reg);
+ if (ret)
+ return ret;
+
+ if (adau1977->dvdd_reg) {
+ ret = regulator_enable(adau1977->dvdd_reg);
+ if (ret)
+ goto err_disable_avdd;
+ }
+
+ if (adau1977->reset_gpio)
+ gpiod_set_value_cansleep(adau1977->reset_gpio, 1);
+
+ regcache_cache_only(adau1977->regmap, false);
+
+ if (adau1977->switch_mode)
+ adau1977->switch_mode(adau1977->dev);
+
+ ret = adau1977_reset(adau1977);
+ if (ret)
+ goto err_disable_dvdd;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_POWER,
+ ADAU1977_POWER_PWUP, ADAU1977_POWER_PWUP);
+ if (ret)
+ goto err_disable_dvdd;
+
+ ret = regcache_sync(adau1977->regmap);
+ if (ret)
+ goto err_disable_dvdd;
+
+ /*
+ * The PLL register is not affected by the software reset. It is
+ * possible that the value of the register was changed to the
+ * default value while we were in cache only mode. In this case
+ * regcache_sync will skip over it and we have to manually sync
+ * it.
+ */
+ ret = regmap_read(adau1977->regmap, ADAU1977_REG_PLL, &val);
+ if (ret)
+ goto err_disable_dvdd;
+
+ if (val == 0x41) {
+ regcache_cache_bypass(adau1977->regmap, true);
+ ret = regmap_write(adau1977->regmap, ADAU1977_REG_PLL,
+ 0x41);
+ if (ret)
+ goto err_disable_dvdd;
+ regcache_cache_bypass(adau1977->regmap, false);
+ }
+
+ adau1977->enabled = true;
+
+ return ret;
+
+err_disable_dvdd:
+ if (adau1977->dvdd_reg)
+ regulator_disable(adau1977->dvdd_reg);
+err_disable_avdd:
+ regulator_disable(adau1977->avdd_reg);
+ return ret;
+}
+
+static int adau1977_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(codec);
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+ ret = adau1977_power_enable(adau1977);
+ break;
+ case SND_SOC_BIAS_OFF:
+ ret = adau1977_power_disable(adau1977);
+ break;
+ }
+
+ if (ret)
+ return ret;
+
+ codec->dapm.bias_level = level;
+
+ return 0;
+}
+
+static int adau1977_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots, int width)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int ctrl0, ctrl1, drv;
+ unsigned int slot[4];
+ unsigned int i;
+ int ret;
+
+ if (slots == 0) {
+ /* 0 = No fixed slot width */
+ adau1977->slot_width = 0;
+ adau1977->max_master_fs = 192000;
+ return regmap_update_bits(adau1977->regmap,
+ ADAU1977_REG_SAI_CTRL0, ADAU1977_SAI_CTRL0_SAI_MASK,
+ ADAU1977_SAI_CTRL0_SAI_I2S);
+ }
+
+ if (rx_mask == 0 || tx_mask != 0)
+ return -EINVAL;
+
+ drv = 0;
+ for (i = 0; i < 4; i++) {
+ slot[i] = __ffs(rx_mask);
+ drv |= ADAU1977_SAI_OVERTEMP_DRV_C(i);
+ rx_mask &= ~(1 << slot[i]);
+ if (slot[i] >= slots)
+ return -EINVAL;
+ if (rx_mask == 0)
+ break;
+ }
+
+ if (rx_mask != 0)
+ return -EINVAL;
+
+ switch (width) {
+ case 16:
+ ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_16;
+ break;
+ case 24:
+ /* We can only generate 16 bit or 32 bit wide slots */
+ if (adau1977->master)
+ return -EINVAL;
+ ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_24;
+ break;
+ case 32:
+ ctrl1 = ADAU1977_SAI_CTRL1_SLOT_WIDTH_32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (slots) {
+ case 2:
+ ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_2;
+ break;
+ case 4:
+ ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_4;
+ break;
+ case 8:
+ ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_8;
+ break;
+ case 16:
+ ctrl0 = ADAU1977_SAI_CTRL0_SAI_TDM_16;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_OVERTEMP,
+ ADAU1977_SAI_OVERTEMP_DRV_C(0) |
+ ADAU1977_SAI_OVERTEMP_DRV_C(1) |
+ ADAU1977_SAI_OVERTEMP_DRV_C(2) |
+ ADAU1977_SAI_OVERTEMP_DRV_C(3), drv);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(adau1977->regmap, ADAU1977_REG_CMAP12,
+ (slot[1] << ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET) |
+ (slot[0] << ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(adau1977->regmap, ADAU1977_REG_CMAP34,
+ (slot[3] << ADAU1977_CHAN_MAP_SECOND_SLOT_OFFSET) |
+ (slot[2] << ADAU1977_CHAN_MAP_FIRST_SLOT_OFFSET));
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
+ ADAU1977_SAI_CTRL0_SAI_MASK, ctrl0);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL1,
+ ADAU1977_SAI_CTRL1_SLOT_WIDTH_MASK, ctrl1);
+ if (ret)
+ return ret;
+
+ adau1977->slot_width = width;
+
+ /* In master mode the maximum bitclock is 24.576 MHz */
+ adau1977->max_master_fs = min(192000, 24576000 / width / slots);
+
+ return 0;
+}
+
+static int adau1977_mute(struct snd_soc_dai *dai, int mute, int stream)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int val;
+
+ if (mute)
+ val = ADAU1977_MISC_CONTROL_MMUTE;
+ else
+ val = 0;
+
+ return regmap_update_bits(adau1977->regmap, ADAU1977_REG_MISC_CONTROL,
+ ADAU1977_MISC_CONTROL_MMUTE, val);
+}
+
+static int adau1977_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int ctrl0 = 0, ctrl1 = 0, block_power = 0;
+ bool invert_lrclk;
+ int ret;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ adau1977->master = false;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ ctrl1 |= ADAU1977_SAI_CTRL1_MASTER;
+ adau1977->master = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ invert_lrclk = false;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ block_power |= ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE;
+ invert_lrclk = false;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ invert_lrclk = true;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ block_power |= ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE;
+ invert_lrclk = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ adau1977->right_j = false;
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_LJ;
+ invert_lrclk = !invert_lrclk;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_RJ_24BIT;
+ adau1977->right_j = true;
+ invert_lrclk = !invert_lrclk;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ ctrl1 |= ADAU1977_SAI_CTRL1_LRCLK_PULSE;
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_I2S;
+ invert_lrclk = false;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ ctrl1 |= ADAU1977_SAI_CTRL1_LRCLK_PULSE;
+ ctrl0 |= ADAU1977_SAI_CTRL0_FMT_LJ;
+ invert_lrclk = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (invert_lrclk)
+ block_power |= ADAU1977_BLOCK_POWER_SAI_LR_POL;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_BLOCK_POWER_SAI,
+ ADAU1977_BLOCK_POWER_SAI_LR_POL |
+ ADAU1977_BLOCK_POWER_SAI_BCLK_EDGE, block_power);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL0,
+ ADAU1977_SAI_CTRL0_FMT_MASK,
+ ctrl0);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_CTRL1,
+ ADAU1977_SAI_CTRL1_MASTER | ADAU1977_SAI_CTRL1_LRCLK_PULSE,
+ ctrl1);
+}
+
+static int adau1977_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
+ u64 formats = 0;
+
+ if (adau1977->slot_width == 16)
+ formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE;
+ else if (adau1977->right_j || adau1977->slot_width == 24)
+ formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE;
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, &adau1977->constraints);
+
+ if (adau1977->master)
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_RATE, 8000, adau1977->max_master_fs);
+
+ if (formats != 0)
+ snd_pcm_hw_constraint_mask64(substream->runtime,
+ SNDRV_PCM_HW_PARAM_FORMAT, formats);
+
+ return 0;
+}
+
+static int adau1977_set_tristate(struct snd_soc_dai *dai, int tristate)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int val;
+
+ if (tristate)
+ val = ADAU1977_SAI_OVERTEMP_DRV_HIZ;
+ else
+ val = 0;
+
+ return regmap_update_bits(adau1977->regmap, ADAU1977_REG_SAI_OVERTEMP,
+ ADAU1977_SAI_OVERTEMP_DRV_HIZ, val);
+}
+
+static const struct snd_soc_dai_ops adau1977_dai_ops = {
+ .startup = adau1977_startup,
+ .hw_params = adau1977_hw_params,
+ .mute_stream = adau1977_mute,
+ .set_fmt = adau1977_set_dai_fmt,
+ .set_tdm_slot = adau1977_set_tdm_slot,
+ .set_tristate = adau1977_set_tristate,
+};
+
+static struct snd_soc_dai_driver adau1977_dai = {
+ .name = "adau1977-hifi",
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 4,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .sig_bits = 24,
+ },
+ .ops = &adau1977_dai_ops,
+};
+
+static const unsigned int adau1977_rates[] = {
+ 8000, 16000, 32000, 64000, 128000,
+ 11025, 22050, 44100, 88200, 172400,
+ 12000, 24000, 48000, 96000, 192000,
+};
+
+#define ADAU1977_RATE_CONSTRAINT_MASK_32000 0x001f
+#define ADAU1977_RATE_CONSTRAINT_MASK_44100 0x03e0
+#define ADAU1977_RATE_CONSTRAINT_MASK_48000 0x7c00
+/* All rates >= 32000 */
+#define ADAU1977_RATE_CONSTRAINT_MASK_LRCLK 0x739c
+
+static bool adau1977_check_sysclk(unsigned int mclk, unsigned int base_freq)
+{
+ unsigned int mcs;
+
+ if (mclk % (base_freq * 128) != 0)
+ return false;
+
+ mcs = mclk / (128 * base_freq);
+ if (mcs < 1 || mcs > 6 || mcs == 5)
+ return false;
+
+ return true;
+}
+
+static int adau1977_set_sysclk(struct snd_soc_codec *codec,
+ int clk_id, int source, unsigned int freq, int dir)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(codec);
+ unsigned int mask = 0;
+ unsigned int clk_src;
+ unsigned int ret;
+
+ if (dir != SND_SOC_CLOCK_IN)
+ return -EINVAL;
+
+ if (clk_id != ADAU1977_SYSCLK)
+ return -EINVAL;
+
+ switch (source) {
+ case ADAU1977_SYSCLK_SRC_MCLK:
+ clk_src = 0;
+ break;
+ case ADAU1977_SYSCLK_SRC_LRCLK:
+ clk_src = ADAU1977_PLL_CLK_S;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (freq != 0 && source == ADAU1977_SYSCLK_SRC_MCLK) {
+ if (freq < 4000000 || freq > 36864000)
+ return -EINVAL;
+
+ if (adau1977_check_sysclk(freq, 32000))
+ mask |= ADAU1977_RATE_CONSTRAINT_MASK_32000;
+ if (adau1977_check_sysclk(freq, 44100))
+ mask |= ADAU1977_RATE_CONSTRAINT_MASK_44100;
+ if (adau1977_check_sysclk(freq, 48000))
+ mask |= ADAU1977_RATE_CONSTRAINT_MASK_48000;
+
+ if (mask == 0)
+ return -EINVAL;
+ } else if (source == ADAU1977_SYSCLK_SRC_LRCLK) {
+ mask = ADAU1977_RATE_CONSTRAINT_MASK_LRCLK;
+ }
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_PLL,
+ ADAU1977_PLL_CLK_S, clk_src);
+ if (ret)
+ return ret;
+
+ adau1977->constraints.mask = mask;
+ adau1977->sysclk_src = source;
+ adau1977->sysclk = freq;
+
+ return 0;
+}
+
+static int adau1977_codec_probe(struct snd_soc_codec *codec)
+{
+ struct adau1977 *adau1977 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ switch (adau1977->type) {
+ case ADAU1977:
+ ret = snd_soc_dapm_new_controls(&codec->dapm,
+ adau1977_micbias_dapm_widgets,
+ ARRAY_SIZE(adau1977_micbias_dapm_widgets));
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_codec_driver adau1977_codec_driver = {
+ .probe = adau1977_codec_probe,
+ .set_bias_level = adau1977_set_bias_level,
+ .set_sysclk = adau1977_set_sysclk,
+ .idle_bias_off = true,
+
+ .controls = adau1977_snd_controls,
+ .num_controls = ARRAY_SIZE(adau1977_snd_controls),
+ .dapm_widgets = adau1977_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(adau1977_dapm_widgets),
+ .dapm_routes = adau1977_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(adau1977_dapm_routes),
+};
+
+static int adau1977_setup_micbias(struct adau1977 *adau1977)
+{
+ struct adau1977_platform_data *pdata = adau1977->dev->platform_data;
+ unsigned int micbias;
+
+ if (pdata) {
+ micbias = pdata->micbias;
+ if (micbias > ADAU1977_MICBIAS_9V0)
+ return -EINVAL;
+
+ } else {
+ micbias = ADAU1977_MICBIAS_8V5;
+ }
+
+ return regmap_update_bits(adau1977->regmap, ADAU1977_REG_MICBIAS,
+ ADAU1977_MICBIAS_MB_VOLTS_MASK,
+ micbias << ADAU1977_MICBIAS_MB_VOLTS_OFFSET);
+}
+
+int adau1977_probe(struct device *dev, struct regmap *regmap,
+ enum adau1977_type type, void (*switch_mode)(struct device *dev))
+{
+ unsigned int power_off_mask;
+ struct adau1977 *adau1977;
+ int ret;
+
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ adau1977 = devm_kzalloc(dev, sizeof(*adau1977), GFP_KERNEL);
+ if (adau1977 == NULL)
+ return -ENOMEM;
+
+ adau1977->dev = dev;
+ adau1977->type = type;
+ adau1977->regmap = regmap;
+ adau1977->switch_mode = switch_mode;
+ adau1977->max_master_fs = 192000;
+
+ adau1977->constraints.list = adau1977_rates;
+ adau1977->constraints.count = ARRAY_SIZE(adau1977_rates);
+
+ adau1977->avdd_reg = devm_regulator_get(dev, "AVDD");
+ if (IS_ERR(adau1977->avdd_reg))
+ return PTR_ERR(adau1977->avdd_reg);
+
+ adau1977->dvdd_reg = devm_regulator_get_optional(dev, "DVDD");
+ if (IS_ERR(adau1977->dvdd_reg)) {
+ if (PTR_ERR(adau1977->dvdd_reg) != -ENODEV)
+ return PTR_ERR(adau1977->dvdd_reg);
+ adau1977->dvdd_reg = NULL;
+ }
+
+ adau1977->reset_gpio = devm_gpiod_get(dev, "reset");
+ if (IS_ERR(adau1977->reset_gpio)) {
+ ret = PTR_ERR(adau1977->reset_gpio);
+ if (ret != -ENOENT && ret != -ENOSYS)
+ return PTR_ERR(adau1977->reset_gpio);
+ adau1977->reset_gpio = NULL;
+ }
+
+ dev_set_drvdata(dev, adau1977);
+
+ if (adau1977->reset_gpio) {
+ ret = gpiod_direction_output(adau1977->reset_gpio, 0);
+ if (ret)
+ return ret;
+ ndelay(100);
+ }
+
+ ret = adau1977_power_enable(adau1977);
+ if (ret)
+ return ret;
+
+ if (type == ADAU1977) {
+ ret = adau1977_setup_micbias(adau1977);
+ if (ret)
+ goto err_poweroff;
+ }
+
+ if (adau1977->dvdd_reg)
+ power_off_mask = ~0;
+ else
+ power_off_mask = ~ADAU1977_BLOCK_POWER_SAI_LDO_EN;
+
+ ret = regmap_update_bits(adau1977->regmap, ADAU1977_REG_BLOCK_POWER_SAI,
+ power_off_mask, 0x00);
+ if (ret)
+ goto err_poweroff;
+
+ ret = adau1977_power_disable(adau1977);
+ if (ret)
+ return ret;
+
+ return snd_soc_register_codec(dev, &adau1977_codec_driver,
+ &adau1977_dai, 1);
+
+err_poweroff:
+ adau1977_power_disable(adau1977);
+ return ret;
+
+}
+EXPORT_SYMBOL_GPL(adau1977_probe);
+
+static bool adau1977_register_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case ADAU1977_REG_STATUS(0):
+ case ADAU1977_REG_STATUS(1):
+ case ADAU1977_REG_STATUS(2):
+ case ADAU1977_REG_STATUS(3):
+ case ADAU1977_REG_ADC_CLIP:
+ return true;
+ }
+
+ return false;
+}
+
+const struct regmap_config adau1977_regmap_config = {
+ .max_register = ADAU1977_REG_DC_HPF_CAL,
+ .volatile_reg = adau1977_register_volatile,
+
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults = adau1977_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(adau1977_reg_defaults),
+};
+EXPORT_SYMBOL_GPL(adau1977_regmap_config);
+
+MODULE_DESCRIPTION("ASoC ADAU1977/ADAU1978/ADAU1979 driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars(a)metafoo.de>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/adau1977.h b/sound/soc/codecs/adau1977.h
new file mode 100644
index 0000000..95e7143
--- /dev/null
+++ b/sound/soc/codecs/adau1977.h
@@ -0,0 +1,37 @@
+/*
+ * ADAU1977/ADAU1978/ADAU1979 driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars(a)metafoo.de>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef __SOUND_SOC_CODECS_ADAU1977_H__
+#define __SOUND_SOC_CODECS_ADAU1977_H__
+
+#include <linux/regmap.h>
+
+struct device;
+
+enum adau1977_type {
+ ADAU1977,
+ ADAU1978,
+ ADAU1979,
+};
+
+int adau1977_probe(struct device *dev, struct regmap *regmap,
+ enum adau1977_type type, void (*switch_mode)(struct device *dev));
+
+extern const struct regmap_config adau1977_regmap_config;
+
+enum adau1977_clk_id {
+ ADAU1977_SYSCLK,
+};
+
+enum adau1977_sysclk_src {
+ ADAU1977_SYSCLK_SRC_MCLK,
+ ADAU1977_SYSCLK_SRC_LRCLK,
+};
+
+#endif
--
1.8.0
