mfd: ac100: Add driver for X-Powers AC100 audio codec / RTC combo IC

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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/include/linux/mfd/ac100.h b/include/linux/mfd/ac100.h
new file mode 100644
index 000000000000..3c148f196b9f
--- /dev/null
+++ b/include/linux/mfd/ac100.h
@@ -0,0 +1,178 @@
+/*
+ * Functions and registers to access AC100 codec / RTC combo IC.
+ *
+ * Copyright (C) 2016 Chen-Yu Tsai
+ *
+ * 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.
+ */
+
+#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_CLKOUT_CTRL1              0xc1
+#define AC100_CLKOUT_CTRL2              0xc2
+#define AC100_CLKOUT_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 */