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/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include <sound/soc.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 struct reg_default wm8988_reg_defaults[] = {
	{ 0, 0x0097 },
	{ 1, 0x0097 },
	{ 2, 0x0079 },
	{ 3, 0x0079 },
	{ 5, 0x0008 },
	{ 7, 0x000a },
	{ 8, 0x0000 },
	{ 10, 0x00ff },
	{ 11, 0x00ff },
	{ 12, 0x000f },
	{ 13, 0x000f },
	{ 16, 0x0000 },
	{ 17, 0x007b },
	{ 18, 0x0000 },
	{ 19, 0x0032 },
	{ 20, 0x0000 },
	{ 21, 0x00c3 },
	{ 22, 0x00c3 },
	{ 23, 0x00c0 },
	{ 24, 0x0000 },
	{ 25, 0x0000 },
	{ 26, 0x0000 },
	{ 27, 0x0000 },
	{ 31, 0x0000 },
	{ 32, 0x0000 },
	{ 33, 0x0000 },
	{ 34, 0x0050 },
	{ 35, 0x0050 },
	{ 36, 0x0050 },
	{ 37, 0x0050 },
	{ 40, 0x0079 },
	{ 41, 0x0079 },
	{ 42, 0x0079 },
};

static bool wm8988_writeable(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case WM8988_LINVOL:
	case WM8988_RINVOL:
	case WM8988_LOUT1V:
	case WM8988_ROUT1V:
	case WM8988_ADCDAC:
	case WM8988_IFACE:
	case WM8988_SRATE:
	case WM8988_LDAC:
	case WM8988_RDAC:
	case WM8988_BASS:
	case WM8988_TREBLE:
	case WM8988_RESET:
	case WM8988_3D:
	case WM8988_ALC1:
	case WM8988_ALC2:
	case WM8988_ALC3:
	case WM8988_NGATE:
	case WM8988_LADC:
	case WM8988_RADC:
	case WM8988_ADCTL1:
	case WM8988_ADCTL2:
	case WM8988_PWR1:
	case WM8988_PWR2:
	case WM8988_ADCTL3:
	case WM8988_ADCIN:
	case WM8988_LADCIN:
	case WM8988_RADCIN:
	case WM8988_LOUTM1:
	case WM8988_LOUTM2:
	case WM8988_ROUTM1:
	case WM8988_ROUTM2:
	case WM8988_LOUT2V:
	case WM8988_ROUT2V:
	case WM8988_LPPB:
		return true;
	default:
		return false;
	}
}

/* codec private data */
struct wm8988_priv {
	struct regmap *regmap;
	unsigned int sysclk;
	struct snd_pcm_hw_constraint_list *sysclk_constraints;
};

#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