path: root/sound/soc/codecs/wm8988.c

/*
 * wm8988.c -- WM8988 ALSA SoC audio driver
 *
 * Copyright 2009 Wolfson Microelectronics plc
 * Copyright 2005 Openedhand Ltd.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

#include "wm8988.h"

/*
 * wm8988 register cache
 * We can't read the WM8988 register space when we
 * are using 2 wire for device control, so we cache them instead.
 */
static const u16 wm8988_reg[] = {
	0x0097, 0x0097, 0x0079, 0x0079,  /*  0 */
	0x0000, 0x0008, 0x0000, 0x000a,  /*  4 */
	0x0000, 0x0000, 0x00ff, 0x00ff,  /*  8 */
	0x000f, 0x000f, 0x0000, 0x0000,  /* 12 */
	0x0000, 0x007b, 0x0000, 0x0032,  /* 16 */
	0x0000, 0x00c3, 0x00c3, 0x00c0,  /* 20 */
	0x0000, 0x0000, 0x0000, 0x0000,  /* 24 */
	0x0000, 0x0000, 0x0000, 0x0000,  /* 28 */
	0x0000, 0x0000, 0x0050, 0x0050,  /* 32 */
	0x0050, 0x0050, 0x0050, 0x0050,  /* 36 */
	0x0079, 0x0079, 0x0079,          /* 40 */
};

/* codec private data */
struct wm8988_priv {
	unsigned int sysclk;
	struct snd_soc_codec codec;
	struct snd_pcm_hw_constraint_list *sysclk_constraints;
	u16 reg_cache[WM8988_NUM_REG];
};


#define wm8988_reset(c)	snd_soc_write(c, WM8988_RESET, 0)

/*
 * WM8988 Controls
 */

static const char *bass_boost_txt[] = {"Linear Control", "Adaptive Boost"};
static const struct soc_enum bass_boost =
	SOC_ENUM_SINGLE(WM8988_BASS, 7, 2, bass_boost_txt);

static const char *bass_filter_txt[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
static const struct soc_enum bass_filter =
	SOC_ENUM_SINGLE(WM8988_BASS, 6, 2, bass_filter_txt);

static const char *treble_txt[] = {"8kHz", "4kHz"};
static const struct soc_enum treble =
	SOC_ENUM_SINGLE(WM8988_TREBLE, 6, 2, treble_txt);

static const char *stereo_3d_lc_txt[] = {"200Hz", "500Hz"};
static const struct soc_enum stereo_3d_lc =
	SOC_ENUM_SINGLE(WM8988_3D, 5, 2, stereo_3d_lc_txt);

static const char *stereo_3d_uc_txt[] = {"2.2kHz", "1.5kHz"};
static const struct soc_enum stereo_3d_uc =
	SOC_ENUM_SINGLE(WM8988_3D, 6, 2, stereo_3d_uc_txt);

static const char *stereo_3d_func_txt[] = {"Capture", "Playback"};
static const struct soc_enum stereo_3d_func =
	SOC_ENUM_SINGLE(WM8988_3D, 7, 2, stereo_3d_func_txt);

static const char *alc_func_txt[] = {"Off", "Right", "Left", "Stereo"};
static const struct soc_enum alc_func =
	SOC_ENUM_SINGLE(WM8988_ALC1, 7, 4, alc_func_txt);

static const char *ng_type_txt[] = {"Constant PGA Gain",
				    "Mute ADC Output"};
static const struct soc_enum ng_type =
	SOC_ENUM_SINGLE(WM8988_NGATE, 1, 2, ng_type_txt);

static const char *deemph_txt[] = {"None", "32Khz", "44.1Khz", "48Khz"};
static const struct soc_enum deemph =
	SOC_ENUM_SINGLE(WM8988_ADCDAC, 1, 4, deemph_txt);

static const char *adcpol_txt[] = {"Normal", "L Invert", "R Invert",
				   "L + R Invert"};
static const struct soc_enum adcpol =
	SOC_ENUM_SINGLE(WM8988_ADCDAC, 5, 4, adcpol_txt);

static const