[PATCH v2 03/10] mfd: ac100: Add driver for X-Powers AC100 audio codec / RTC combo IC

Chen-Yu Tsai
2016-06-15T10:27:40Z

The AC100 is a multifunction device with an audio codec subsystem and
an RTC subsystem. These two subsystems share a common register space
and host interface.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
drivers/mfd/Kconfig | 10 +++
drivers/mfd/Makefile | 2 +
drivers/mfd/ac100.c | 135 +++++++++++++++++++++++++++++++++++
include/linux/mfd/ac100.h | 176 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 323 insertions(+)
create mode 100644 drivers/mfd/ac100.c
create mode 100644 include/linux/mfd/ac100.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 1bcf601de5bc..bd83849a0c8d 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -101,6 +101,16 @@ config MFD_BCM590XX
help
Support for the BCM590xx PMUs from Broadcom

+config MFD_AC100
+ tristate "X-Powers AC100"
+ select MFD_CORE
+ depends on SUNXI_RSB
+ help
+ If you say Y here you get support for the X-Powers AC100 audio codec
+ IC.
+ This driver include only the core APIs. You have to select individual
+ components like codecs or RTC under the corresponding menus.
+
config MFD_AXP20X
tristate
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 42a66e19e191..60f9a6b0557c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -113,6 +113,8 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-irq.o
obj-$(CONFIG_PMIC_DA9052) += da9052-core.o
obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
+
+obj-$(CONFIG_MFD_AC100) += ac100.o
obj-$(CONFIG_MFD_AXP20X) += axp20x.o
obj-$(CONFIG_MFD_AXP20X_I2C) += axp20x-i2c.o
obj-$(CONFIG_MFD_AXP20X_RSB) += axp20x-rsb.o
diff --git a/drivers/mfd/ac100.c b/drivers/mfd/ac100.c
new file mode 100644
index 000000000000..15d24fa77771
--- /dev/null
+++ b/drivers/mfd/ac100.c
@@ -0,0 +1,135 @@
+/*
+ * ac100.c - MFD core driver for X-Powers' AC100 Audio Codec IC
+ *
+ * The AC100 is a highly integrated audio codec and RTC subsystem designed
+ * for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC,
+ * a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has
+ * 3 clock outputs.
+ *
+ * The audio codec and RTC parts are completely separate, sharing only the
+ * host interface for access to its registers.
+ *
+ * Author: Chen-Yu Tsai <wens@csie.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/ac100.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/sunxi-rsb.h>
+
+static const struct regmap_range ac100_writeable_ranges[] = {
+ regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_I2S_SR_CTRL),
+ regmap_reg_range(AC100_I2S1_CLK_CTRL, AC100_I2S1_MXR_GAIN),
+ regmap_reg_range(AC100_I2S2_CLK_CTRL, AC100_I2S2_MXR_GAIN),
+ regmap_reg_range(AC100_I2S3_CLK_CTRL, AC100_I2S3_SIG_PATH_CTRL),
+ regmap_reg_range(AC100_ADC_DIG_CTRL, AC100_ADC_VOL_CTRL),
+ regmap_reg_range(AC100_HMIC_CTRL1, AC100_HMIC_STATUS),
+ regmap_reg_range(AC100_DAC_DIG_CTRL, AC100_DAC_MXR_GAIN),
+ regmap_reg_range(AC100_ADC_APC_CTRL, AC100_LINEOUT_CTRL),
+ regmap_reg_range(AC100_ADC_DAP_L_CTRL, AC100_ADC_DAP_OPT),
+ regmap_reg_range(AC100_DAC_DAP_CTRL, AC100_DAC_DAP_OPT),
+ regmap_reg_range(AC100_ADC_DAP_ENA, AC100_DAC_DAP_ENA),
+ regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL2),
+ regmap_reg_range(AC100_SRC2_CTRL1, AC100_SRC2_CTRL2),
+ regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLK32K_OUT_CTRL3),
+ regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD),
+ regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA),
+ regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)),
+};
+
+static const struct regmap_range ac100_volatile_ranges[] = {
+ regmap_reg_range(AC100_CHIP_AUDIO_RST, AC100_PLL_CTRL2),
+ regmap_reg_range(AC100_HMIC_STATUS, AC100_HMIC_STATUS),
+ regmap_reg_range(AC100_ADC_DAP_L_STA, AC100_ADC_DAP_L_STA),
+ regmap_reg_range(AC100_SRC1_CTRL1, AC100_SRC1_CTRL1),
+ regmap_reg_range(AC100_SRC1_CTRL3, AC100_SRC2_CTRL1),
+ regmap_reg_range(AC100_SRC2_CTRL3, AC100_SRC2_CTRL4),
+ regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST),
+ regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA),
+ regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD),
+};
+
+static const struct regmap_access_table ac100_writeable_table = {
+ .yes_ranges = ac100_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(ac100_writeable_ranges),
+};
+
+static const struct regmap_access_table ac100_volatile_table = {
+ .yes_ranges = ac100_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(ac100_volatile_ranges),
+};
+
+static const struct regmap_config ac100_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .wr_table = &ac100_writeable_table,
+ .volatile_table = &ac100_volatile_table,
+ .max_register = AC100_RTC_GP(15),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static struct mfd_cell ac100_cells[] = {
+ {
+ .name = "ac100-codec",
+ .of_compatible = "x-powers,ac100-codec",
+ }, {
+ .name = "ac100-rtc",
+ .of_compatible = "x-powers,ac100-rtc",
+ },
+};
+
+static int ac100_rsb_probe(struct sunxi_rsb_device *rdev)
+{
+ struct ac100_dev *ac100;
+ int ret;
+
+ ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL);
+ if (!ac100)
+ return -ENOMEM;
+
+ ac100->dev = &rdev->dev;
+ sunxi_rsb_device_set_drvdata(rdev, ac100);
+
+ ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config);
+ if (IS_ERR(ac100->regmap)) {
+ ret = PTR_ERR(ac100->regmap);
+ dev_err(ac100->dev, "regmap init failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells,
+ ARRAY_SIZE(ac100_cells), NULL, 0, NULL);
+ if (ret) {
+ dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id ac100_of_match[] = {
+ { .compatible = "x-powers,ac100" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ac100_of_match);
+
+static struct sunxi_rsb_driver ac100_rsb_driver = {
+ .driver = {
+ .name = "ac100",
+ .of_match_table = of_match_ptr(ac100_of_match),
+ },
+ .probe = ac100_rsb_probe,
+};
+module_sunxi_rsb_driver(ac100_rsb_driver);
+
+MODULE_DESCRIPTION("Audio codec MFD core driver for AC100");
+MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/ac100.h b/include/linux/mfd/ac100.h
new file mode 100644
index 000000000000..460b4fd03df1
--- /dev/null
+++ b/include/linux/mfd/ac100.h
@@ -0,0 +1,176 @@
+/*
+ * Functions and registers to access AC100 codec / RTC combo IC.
+ *
+ * Copyright (C) 2013, Carlo Caione <carlo@caione.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_MFD_AC100_H
+#define __LINUX_MFD_AC100_H
+
+#include <linux/regmap.h>
+
+struct ac100_dev {
+ struct device *dev;
+ struct regmap *regmap;
+};
+
+/* Audio codec related registers */
+#define AC100_CHIP_AUDIO_RST 0x00
+#define AC100_PLL_CTRL1 0x01
+#define AC100_PLL_CTRL2 0x02
+#define AC100_SYSCLK_CTRL 0x03
+#define AC100_MOD_CLK_ENA 0x04
+#define AC100_MOD_RST_CTRL 0x05
+#define AC100_I2S_SR_CTRL 0x06
+
+/* I2S1 interface */
+#define AC100_I2S1_CLK_CTRL 0x10
+#define AC100_I2S1_SND_OUT_CTRL 0x11
+#define AC100_I2S1_SND_IN_CTRL 0x12
+#define AC100_I2S1_MXR_SRC 0x13
+#define AC100_I2S1_VOL_CTRL1 0x14
+#define AC100_I2S1_VOL_CTRL2 0x15
+#define AC100_I2S1_VOL_CTRL3 0x16
+#define AC100_I2S1_VOL_CTRL4 0x17
+#define AC100_I2S1_MXR_GAIN 0x18
+
+/* I2S2 interface */
+#define AC100_I2S2_CLK_CTRL 0x20
+#define AC100_I2S2_SND_OUT_CTRL 0x21
+#define AC100_I2S2_SND_IN_CTRL 0x22
+#define AC100_I2S2_MXR_SRC 0x23
+#define AC100_I2S2_VOL_CTRL1 0x24
+#define AC100_I2S2_VOL_CTRL2 0x25
+#define AC100_I2S2_VOL_CTRL3 0x26
+#define AC100_I2S2_VOL_CTRL4 0x27
+#define AC100_I2S2_MXR_GAIN 0x28
+
+/* I2S3 interface */
+#define AC100_I2S3_CLK_CTRL 0x30
+#define AC100_I2S3_SND_OUT_CTRL 0x31
+#define AC100_I2S3_SND_IN_CTRL 0x32
+#define AC100_I2S3_SIG_PATH_CTRL 0x33
+
+/* ADC digital controls */
+#define AC100_ADC_DIG_CTRL 0x40
+#define AC100_ADC_VOL_CTRL 0x41
+
+/* HMIC plug sensing / key detection */
+#define AC100_HMIC_CTRL1 0x44
+#define AC100_HMIC_CTRL2 0x45
+#define AC100_HMIC_STATUS 0x46
+
+/* DAC digital controls */
+#define AC100_DAC_DIG_CTRL 0x48
+#define AC100_DAC_VOL_CTRL 0x49
+#define AC100_DAC_MXR_SRC 0x4c
+#define AC100_DAC_MXR_GAIN 0x4d
+
+/* Analog controls */
+#define AC100_ADC_APC_CTRL 0x50
+#define AC100_ADC_SRC 0x51
+#define AC100_ADC_SRC_BST_CTRL 0x52
+#define AC100_OUT_MXR_DAC_A_CTRL 0x53
+#define AC100_OUT_MXR_SRC 0x54
+#define AC100_OUT_MXR_SRC_BST 0x55
+#define AC100_HPOUT_CTRL 0x56
+#define AC100_ERPOUT_CTRL 0x57
+#define AC100_SPKOUT_CTRL 0x58
+#define AC100_LINEOUT_CTRL 0x59
+
+/* ADC digital audio processing (high pass filter & auto gain control */
+#define AC100_ADC_DAP_L_STA 0x80
+#define AC100_ADC_DAP_R_STA 0x81
+#define AC100_ADC_DAP_L_CTRL 0x82
+#define AC100_ADC_DAP_R_CTRL 0x83
+#define AC100_ADC_DAP_L_T_L 0x84 /* Left Target Level */
+#define AC100_ADC_DAP_R_T_L 0x85 /* Right Target Level */
+#define AC100_ADC_DAP_L_H_A_C 0x86 /* Left High Avg. Coef */
+#define AC100_ADC_DAP_L_L_A_C 0x87 /* Left Low Avg. Coef */
+#define AC100_ADC_DAP_R_H_A_C 0x88 /* Right High Avg. Coef */
+#define AC100_ADC_DAP_R_L_A_C 0x89 /* Right Low Avg. Coef */
+#define AC100_ADC_DAP_L_D_T 0x8a /* Left Decay Time */
+#define AC100_ADC_DAP_L_A_T 0x8b /* Left Attack Time */
+#define AC100_ADC_DAP_R_D_T 0x8c /* Right Decay Time */
+#define AC100_ADC_DAP_R_A_T 0x8d /* Right Attack Time */
+#define AC100_ADC_DAP_N_TH 0x8e /* Noise Threshold */
+#define AC100_ADC_DAP_L_H_N_A_C 0x8f /* Left High Noise Avg. Coef */
+#define AC100_ADC_DAP_L_L_N_A_C 0x90 /* Left Low Noise Avg. Coef */
+#define AC100_ADC_DAP_R_H_N_A_C 0x91 /* Right High Noise Avg. Coef */
+#define AC100_ADC_DAP_R_L_N_A_C 0x92 /* Right Low Noise Avg. Coef */
+#define AC100_ADC_DAP_H_HPF_C 0x93 /* High High-Pass-Filter Coef */
+#define AC100_ADC_DAP_L_HPF_C 0x94 /* Low High-Pass-Filter Coef */
+#define AC100_ADC_DAP_OPT 0x95 /* AGC Optimum */
+
+/* DAC digital audio processing (high pass filter & dynamic range control) */
+#define AC100_DAC_DAP_CTRL 0xa0
+#define AC100_DAC_DAP_H_HPF_C 0xa1 /* High High-Pass-Filter Coef */
+#define AC100_DAC_DAP_L_HPF_C 0xa2 /* Low High-Pass-Filter Coef */
+#define AC100_DAC_DAP_L_H_E_A_C 0xa3 /* Left High Energy Avg Coef */
+#define AC100_DAC_DAP_L_L_E_A_C 0xa4 /* Left Low Energy Avg Coef */
+#define AC100_DAC_DAP_R_H_E_A_C 0xa5 /* Right High Energy Avg Coef */
+#define AC100_DAC_DAP_R_L_E_A_C 0xa6 /* Right Low Energy Avg Coef */
+#define AC100_DAC_DAP_H_G_D_T_C 0xa7 /* High Gain Delay Time Coef */
+#define AC100_DAC_DAP_L_G_D_T_C 0xa8 /* Low Gain Delay Time Coef */
+#define AC100_DAC_DAP_H_G_A_T_C 0xa9 /* High Gain Attack Time Coef */
+#define AC100_DAC_DAP_L_G_A_T_C 0xaa /* Low Gain Attack Time Coef */
+#define AC100_DAC_DAP_H_E_TH 0xab /* High Energy Threshold */
+#define AC100_DAC_DAP_L_E_TH 0xac /* Low Energy Threshold */
+#define AC100_DAC_DAP_H_G_K 0xad /* High Gain K parameter */
+#define AC100_DAC_DAP_L_G_K 0xae /* Low Gain K parameter */
+#define AC100_DAC_DAP_H_G_OFF 0xaf /* High Gain offset */
+#define AC100_DAC_DAP_L_G_OFF 0xb0 /* Low Gain offset */
+#define AC100_DAC_DAP_OPT 0xb1 /* DRC optimum */
+
+/* Digital audio processing enable */
+#define AC100_ADC_DAP_ENA 0xb4
+#define AC100_DAC_DAP_ENA 0xb5
+
+/* SRC control */
+#define AC100_SRC1_CTRL1 0xb8
+#define AC100_SRC1_CTRL2 0xb9
+#define AC100_SRC1_CTRL3 0xba
+#define AC100_SRC1_CTRL4 0xbb
+#define AC100_SRC2_CTRL1 0xbc
+#define AC100_SRC2_CTRL2 0xbd
+#define AC100_SRC2_CTRL3 0xbe
+#define AC100_SRC2_CTRL4 0xbf
+
+/* RTC clk control */
+#define AC100_CLK32K_ANALOG_CTRL 0xc0
+#define AC100_CLK32K_OUT_CTRL1 0xc1
+#define AC100_CLK32K_OUT_CTRL2 0xc2
+#define AC100_CLK32K_OUT_CTRL3 0xc3
+
+/* RTC module */
+#define AC100_RTC_RST 0xc6
+#define AC100_RTC_CTRL 0xc7
+#define AC100_RTC_SEC 0xc8 /* second */
+#define AC100_RTC_MIN 0xc9 /* minute */
+#define AC100_RTC_HOU 0xca /* hour */
+#define AC100_RTC_WEE 0xcb /* weekday */
+#define AC100_RTC_DAY 0xcc /* day */
+#define AC100_RTC_MON 0xcd /* month */
+#define AC100_RTC_YEA 0xce /* year */
+#define AC100_RTC_UPD 0xcf /* update trigger */
+
+/* RTC alarm */
+#define AC100_ALM_INT_ENA 0xd0
+#define AC100_ALM_INT_STA 0xd1
+#define AC100_ALM_SEC 0xd8
+#define AC100_ALM_MIN 0xd9
+#define AC100_ALM_HOU 0xda
+#define AC100_ALM_WEE 0xdb
+#define AC100_ALM_DAY 0xdc
+#define AC100_ALM_MON 0xdd
+#define AC100_ALM_YEA 0xde
+#define AC100_ALM_UPD 0xdf
+
+/* RTC general purpose register 0 ~ 15 */
+#define AC100_RTC_GP(x) (0xe0 + (x))
+
+#endif /* __LINUX_MFD_AC100_H */
--
2.8.1