ASoC: Add support for CS42L56 CODEC

This patch adds support for the Cirrus Logic Low Power Stereo I2C CODEC

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

5 files changed, 1657 insertions, 0 deletions

diff --git a/include/sound/cs42l56.h b/include/sound/cs42l56.h
new file mode 100644
index 000000000000..2467c8ff132c
--- /dev/null
+++ b/include/sound/cs42l56.h
@@ -0,0 +1,48 @@
+/*
+ * linux/sound/cs42l56.h -- Platform data for CS42L56
+ *
+ * Copyright (c) 2014 Cirrus Logic Inc.
+ *
+ * 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 __CS42L56_H
+#define __CS42L56_H
+
+struct cs42l56_platform_data {
+
+        /* GPIO for Reset */
+        unsigned int gpio_nreset;
+
+        /* MICBIAS Level. Check datasheet Pg48 */
+        unsigned int micbias_lvl;
+
+        /* Analog Input 1A Reference 0=Single 1=Pseudo-Differential */
+        unsigned int ain1a_ref_cfg;
+
+        /* Analog Input 2A Reference 0=Single 1=Pseudo-Differential */
+        unsigned int ain2a_ref_cfg;
+
+        /* Analog Input 1B Reference 0=Single 1=Pseudo-Differential */
+        unsigned int ain1b_ref_cfg;
+
+        /* Analog Input 2B Reference 0=Single 1=Pseudo-Differential */
+        unsigned int ain2b_ref_cfg;
+
+        /* Charge Pump Freq. Check datasheet Pg62 */
+        unsigned int chgfreq;
+
+        /* HighPass Filter Right Channel Corner Frequency */
+        unsigned int hpfb_freq;
+
+        /* HighPass Filter Left Channel Corner Frequency */
+        unsigned int hpfa_freq;
+
+        /* Adaptive Power Control for LO/HP */
+        unsigned int adaptive_pwr;
+
+};
+
+#endif /* __CS42L56_H */
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index d739ba7baeff..755372509cc8 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -41,6 +41,7 @@ config SND_SOC_ALL_CODECS
         select SND_SOC_CQ0093VC if MFD_DAVINCI_VOICECODEC
         select SND_SOC_CS42L51_I2C if I2C
         select SND_SOC_CS42L52 if I2C && INPUT
+        select SND_SOC_CS42L56 if I2C && INPUT
         select SND_SOC_CS42L73 if I2C
         select SND_SOC_CS4270 if I2C
         select SND_SOC_CS4271 if SND_SOC_I2C_AND_SPI
@@ -288,6 +289,10 @@ config SND_SOC_CS42L52
         tristate "Cirrus Logic CS42L52 CODEC"
         depends on I2C && INPUT
 
+config SND_SOC_CS42L56
+        tristate "Cirrus Logic CS42L56 CODEC"
+        depends on I2C && INPUT
+
 config SND_SOC_CS42L73
         tristate "Cirrus Logic CS42L73 CODEC"
         depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index e06f10032344..c225dae517c3 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -28,6 +28,7 @@ snd-soc-cq93vc-objs := cq93vc.o
 snd-soc-cs42l51-objs := cs42l51.o
 snd-soc-cs42l51-i2c-objs := cs42l51-i2c.o
 snd-soc-cs42l52-objs := cs42l52.o
+snd-soc-cs42l56-objs := cs42l56.o
 snd-soc-cs42l73-objs := cs42l73.o
 snd-soc-cs4270-objs := cs4270.o
 snd-soc-cs4271-objs := cs4271.o
@@ -180,6 +181,7 @@ obj-$(CONFIG_SND_SOC_CQ0093VC) += snd-soc-cq93vc.o
 obj-$(CONFIG_SND_SOC_CS42L51)   += snd-soc-cs42l51.o
 obj-$(CONFIG_SND_SOC_CS42L51_I2C)       += snd-soc-cs42l51-i2c.o
 obj-$(CONFIG_SND_SOC_CS42L52)   += snd-soc-cs42l52.o
+obj-$(CONFIG_SND_SOC_CS42L56)   += snd-soc-cs42l56.o
 obj-$(CONFIG_SND_SOC_CS42L73)   += snd-soc-cs42l73.o
 obj-$(CONFIG_SND_SOC_CS4270)    += snd-soc-cs4270.o
 obj-$(CONFIG_SND_SOC_CS4271)    += snd-soc-cs4271.o
diff --git a/sound/soc/codecs/cs42l56.c b/sound/soc/codecs/cs42l56.c
new file mode 100644
index 000000000000..5bb134b4ab9b
--- /dev/null
+++ b/sound/soc/codecs/cs42l56.c
@@ -0,0 +1,1427 @@
+/*
+ * cs42l56.c -- CS42L56 ALSA SoC audio driver
+ *
+ * Copyright 2014 CirrusLogic, Inc.
+ *
+ * Author: Brian Austin <brian.austin@cirrus.com>
+ *
+ * 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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/cs42l56.h>
+#include "cs42l56.h"
+
+#define CS42L56_NUM_SUPPLIES 3
+static const char *const cs42l56_supply_names[CS42L56_NUM_SUPPLIES] = {
+        "VA",
+        "VCP",
+        "VLDO",
+};
+
+struct  cs42l56_private {
+        struct regmap *regmap;
+        struct snd_soc_codec *codec;
+        struct device *dev;
+        struct cs42l56_platform_data pdata;
+        struct regulator_bulk_data supplies[CS42L56_NUM_SUPPLIES];
+        u32 mclk;
+        u8 mclk_prediv;
+        u8 mclk_div2;
+        u8 mclk_ratio;
+        u8 iface;
+        u8 iface_fmt;
+        u8 iface_inv;
+#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+        struct input_dev *beep;
+        struct work_struct beep_work;
+        int beep_rate;
+#endif
+};
+
+static const struct reg_default cs42l56_reg_defaults[] = {
+        { 1, 0x56 },    /* r01  - ID 1 */
+        { 2, 0x04 },    /* r02  - ID 2 */
+        { 3, 0x7f },    /* r03  - Power Ctl 1 */
+        { 4, 0xff },    /* r04  - Power Ctl 2 */
+        { 5, 0x00 },    /* ro5  - Clocking Ctl 1 */
+        { 6, 0x0b },    /* r06  - Clocking Ctl 2 */
+        { 7, 0x00 },    /* r07  - Serial Format */
+        { 8, 0x05 },    /* r08  - Class H Ctl */
+        { 9, 0x0c },    /* r09  - Misc Ctl */
+        { 10, 0x80 },   /* r0a  - INT Status */
+        { 11, 0x00 },   /* r0b  - Playback Ctl */
+        { 12, 0x0c },   /* r0c  - DSP Mute Ctl */
+        { 13, 0x00 },   /* r0d  - ADCA Mixer Volume */
+        { 14, 0x00 },   /* r0e  - ADCB Mixer Volume */
+        { 15, 0x00 },   /* r0f  - PCMA Mixer Volume */
+        { 16, 0x00 },   /* r10  - PCMB Mixer Volume */
+        { 17, 0x00 },   /* r11  - Analog Input Advisory Volume */
+        { 18, 0x00 },   /* r12  - Digital Input Advisory Volume */
+        { 19, 0x00 },   /* r13  - Master A Volume */
+        { 20, 0x00 },   /* r14  - Master B Volume */
+        { 21, 0x00 },   /* r15  - Beep Freq / On Time */
+        { 22, 0x00 },   /* r16  - Beep Volume / Off Time */
+        { 23, 0x00 },   /* r17  - Beep Tone Ctl */
+        { 24, 0x88 },   /* r18  - Tone Ctl */
+        { 25, 0x00 },   /* r19  - Channel Mixer & Swap */
+        { 26, 0x00 },   /* r1a  - AIN Ref Config / ADC Mux */
+        { 27, 0xa0 },   /* r1b  - High-Pass Filter Ctl */
+        { 28, 0x00 },   /* r1c  - Misc ADC Ctl */
+        { 29, 0x00 },   /* r1d  - Gain & Bias Ctl */
+        { 30, 0x00 },   /* r1e  - PGAA Mux & Volume */
+        { 31, 0x00 },   /* r1f  - PGAB Mux & Volume */
+        { 32, 0x00 },   /* r20  - ADCA Attenuator */
+        { 33, 0x00 },   /* r21  - ADCB Attenuator */
+        { 34, 0x00 },   /* r22  - ALC Enable & Attack Rate */
+        { 35, 0xbf },   /* r23  - ALC Release Rate */
+        { 36, 0x00 },   /* r24  - ALC Threshold */
+        { 37, 0x00 },   /* r25  - Noise Gate Ctl */
+        { 38, 0x00 },   /* r26  - ALC, Limiter, SFT, ZeroCross */
+        { 39, 0x00 },   /* r27  - Analog Mute, LO & HP Mux */