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/*
* wm8711.c -- WM8711 ALSA SoC Audio driver
*
* Copyright 2006 Wolfson Microelectronics
*
* Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
*
* Based on wm8731.c by Richard Purdie
*
* 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/regmap.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/initval.h>
#include "wm8711.h"
/* codec private data */
struct wm8711_priv {
struct regmap *regmap;
unsigned int sysclk;
};
/*
* wm8711 register cache
* We can't read the WM8711 register space when we are
* using 2 wire for device control, so we cache them instead.
* There is no point in caching the reset register
*/
static const struct reg_default wm8711_reg_defaults[] = {
{ 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
{ 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
};
static bool wm8711_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8711_RESET:
return true;
default:
return false;
}
}
#define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0)
static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
static const struct snd_kcontrol_new wm8711_snd_controls[] = {
SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
0, 127, 0, out_tlv),
SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
7, 1, 0),
};
/* Output Mixer */
static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
};
static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
&wm8711_output_mixer_controls[0],
ARRAY_SIZE(wm8711_output_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("LHPOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("RHPOUT"),
};
static const struct snd_soc_dapm_route wm8711_intercon[] = {
/* output mixer */
{"Output Mixer", "Line Bypass Switch", "Line Input"},
{"Output Mixer", "HiFi Playback Switch", "DAC"},
/* outputs */
{"RHPOUT", NULL, "Output Mixer"},
{"ROUT", NULL, "Output Mixer"},
{"LHPOUT", NULL, "Output Mixer"},
{"LOUT", NULL, "Output Mixer"},
};
struct _coeff_div {
u32 mclk;
u32 rate;
u16 fs;
u8 sr:4;
u8 bosr:1;
u8 usb:1;
};
/* codec mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
/* 48k */
{12288000, 48000, 256, 0x0, 0x0, 0x0},
{18432000, 48000, 384, 0x0, 0x1, 0x0},
{12000000, 48000, 250, 0x0, 0x0, 0x1},
/* 32k */
{12288000, 32000, 384, 0x6, 0x0, 0x0},
{18432000, 32000, 576, 0x6, 0x1, 0x0},
{12000000, 32000, 375, 0x6, 0x0, 0x1},
/* 8k */
{12288000, 8000, 1536, 0x3, 0x0, 0x0},
{18432000, 8000, 2304, 0x3, 0x1, 0x0},
{11289600, 8000, 1408, 0xb, 0x0, 0x0},
{16934400, 8000, 2112, 0xb, 0x1, 0x0},
{12000000, 8000, 1500, 0x3, 0x0, 0x1},
/* 96k */
{12288000, 96000, 128, 0x7, 0x0, 0x0},
{18432000, 96000, 192, 0x7, 0x1, 0x0},
{12000000, 96000, 125, 0x7, 0x0, 0x1},
/* 44.1k */
{11289600, 44100, 256, 0x8, 0x0, 0x0},
{16934400, 44100, 384, 0x8, 0x1, 0x0},
{12000000, 44100, 272, 0x8, 0x1, 0x1},
/* 88.2k */
{11289600, 88200, 128, 0xf, 0x0, 0x0},
{16934400, 88200, 192, 0xf, 0x1, 0x0},
{12000000, 88200, 136, 0xf, 0x1, 0x1},
};
static inline int get_coeff(int mclk, int rate)
{
int i;
for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
return i;
}
return 0;
}
static int wm8711_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3;
int i = get_coeff(wm8711->sysclk, params_rate(params));
u16 srate = (coeff_div[i].sr << 2) |
(coeff_div[i].bosr << 1) | coeff_div[i].usb;
snd_soc_write(codec, WM8711_SRATE, srate);
/* bit size */
switch (params_width(params)) {
case 16:
break;
case 20:
iface |= 0x0004;
break;
case 24:
iface |= 0x0008;
break;
}
snd_soc_write(codec, WM8711_IFACE, iface);
return 0;
}
static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
/* set active */
snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
return 0;
}
static void wm8711_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
/* deactivate */
if (!snd_soc_codec_is_active(codec)) {
udelay(50);
snd_soc_write(codec, WM8711_ACTIVE, 0x0);
}
}
static int wm8711_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
if (mute)
sn
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