path: root/sound/soc/codecs/wm8971.c

/*
 * wm8971.c  --  WM8971 ALSA SoC Audio driver
 *
 * Copyright 2005 Lab126, Inc.
 *
 * Author: Kenneth Kiraly <kiraly@lab126.com>
 *
 * Based on wm8753.c by Liam Girdwood
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#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/platform_device.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 "wm8971.h"

#define WM8971_VERSION "0.9"

#define	WM8971_REG_COUNT		43

static struct workqueue_struct *wm8971_workq = NULL;

/* codec private data */
struct wm8971_priv {
	unsigned int sysclk;
};

/*
 * wm8971 register cache
 * We can't read the WM8971 register space when we
 * are using 2 wire for device control, so we cache them instead.
 */
static const u16 wm8971_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 */
};

static inline unsigned int wm8971_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	if (reg < WM8971_REG_COUNT)
		return cache[reg];

	return -1;
}

static inline void wm8971_write_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg, unsigned int value)
{
	u16 *cache = codec->reg_cache;
	if (reg < WM8971_REG_COUNT)
		cache[reg] = value;
}

static int wm8971_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
{
	u8 data[2];

	/* data is
	 *   D15..D9 WM8753 register offset
	 *   D8...D0 register data
	 */
	data[0] = (reg << 1) | ((value >> 8) & 0x0001);
	data[1] = value & 0x00ff;

	wm8971_write_reg_cache (codec, reg, value);
	if (codec->hw_write(codec->control_data, data, 2) == 2)
		return 0;
	else
		return -EIO;
}

#define wm8971_reset(c)	wm8971_write(c, WM8971_RESET, 0)

/* WM8971 Controls */
static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
	"200Hz @ 48kHz" };
static const char *wm8971_treble[] = { "8kHz", "4kHz" };
static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
static const char *wm8971_ng_type[] = { "Constant PGA Gain",
	"Mute ADC Output" };
static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
	"Mono (Right)", "Digital Mono"};
static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
	"Differential"};
static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
	"Differential"};
static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
	"L + R Invert"};

static const struct soc_enum wm8971_enum[] = {
	SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass),	/* 0 */
	SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
	SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
	SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
	SOC_ENUM_SINGLE(WM8971_NGATE, <