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linux-next/sound/soc/codecs/wm8974.c
Mark Brown 29e189c29d ASoC: Remove unneeded suspend bias managment from CODEC drivers 
The core will ensure that the device is in either STANDBY or OFF bias
before suspending, restoring the bias in the driver is unneeded. Some
drivers doing slightly more roundabout things have been left alone
for now.

Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2010-05-10 10:35:25 +01:00

798 lines
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/*
* wm8974.c -- WM8974 ALSA Soc Audio driver
*
* Copyright 2006-2009 Wolfson Microelectronics PLC.
*
* Author: Liam Girdwood <linux@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/kernel.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 <sound/tlv.h>
#include "wm8974.h"
static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
0x0000, 0x0000, 0x0000, 0x0000,
0x0050, 0x0000, 0x0140, 0x0000,
0x0000, 0x0000, 0x0000, 0x00ff,
0x0000, 0x0000, 0x0100, 0x00ff,
0x0000, 0x0000, 0x012c, 0x002c,
0x002c, 0x002c, 0x002c, 0x0000,
0x0032, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000,
0x0038, 0x000b, 0x0032, 0x0000,
0x0008, 0x000c, 0x0093, 0x00e9,
0x0000, 0x0000, 0x0000, 0x0000,
0x0003, 0x0010, 0x0000, 0x0000,
0x0000, 0x0002, 0x0000, 0x0000,
0x0000, 0x0000, 0x0039, 0x0000,
0x0000,
};
#define WM8974_POWER1_BIASEN 0x08
#define WM8974_POWER1_BUFIOEN 0x04
struct wm8974_priv {
struct snd_soc_codec codec;
u16 reg_cache[WM8974_CACHEREGNUM];
};
static struct snd_soc_codec *wm8974_codec;
#define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8974_eqmode[] = {"Capture", "Playback" };
static const char *wm8974_bw[] = {"Narrow", "Wide" };
static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
static const char *wm8974_alc[] = {"ALC", "Limiter" };
static const struct soc_enum wm8974_enum[] = {
SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
};
static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
static const struct soc_enum wm8974_auxmode =
SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text);
static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
static const struct snd_kcontrol_new wm8974_snd_controls[] = {
SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
SOC_ENUM("DAC Companding", wm8974_enum[1]),
SOC_ENUM("ADC Companding", wm8974_enum[0]),
SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
SOC_ENUM("Equaliser Function", wm8974_enum[3]),
SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
SOC_ENUM("Aux Mode", wm8974_auxmode),
SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
/* DAC / ADC oversampling */
SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
};
/* Speaker Output Mixer */
static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
};
/* Mono Output Mixer */
static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
};
/* Boost mixer */
static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
};
/* Input PGA */
static const struct snd_kcontrol_new wm8974_inpga[] = {
SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
};
/* AUX Input boost vol */
static const struct snd_kcontrol_new wm8974_aux_boost_controls =
SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
/* Mic Input boost vol */
static const struct snd_kcontrol_new wm8974_mic_boost_controls =
SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
&wm8974_speaker_mixer_controls[0],
ARRAY_SIZE(wm8974_speaker_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
&wm8974_mono_mixer_controls[0],
ARRAY_SIZE(wm8974_mono_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
ARRAY_SIZE(wm8974_inpga)),
SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
SND_SOC_DAPM_INPUT("MICN"),
SND_SOC_DAPM_INPUT("MICP"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("SPKOUTP"),
SND_SOC_DAPM_OUTPUT("SPKOUTN"),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Mono output mixer */
{"Mono Mixer", "PCM Playback Switch", "DAC"},
{"Mono Mixer", "Aux Playback Switch", "Aux Input"},
{"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
/* Speaker output mixer */
{"Speaker Mixer", "PCM Playback Switch", "DAC"},
{"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
{"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
/* Outputs */
{"Mono Out", NULL, "Mono Mixer"},
{"MONOOUT", NULL, "Mono Out"},
{"SpkN Out", NULL, "Speaker Mixer"},
{"SpkP Out", NULL, "Speaker Mixer"},
{"SPKOUTN", NULL, "SpkN Out"},
{"SPKOUTP", NULL, "SpkP Out"},
/* Boost Mixer */
{"ADC", NULL, "Boost Mixer"},
{"Boost Mixer", "Aux Switch", "Aux Input"},
{"Boost Mixer", NULL, "Input PGA"},
{"Boost Mixer", NULL, "MICP"},
/* Input PGA */
{"Input PGA", "Aux Switch", "Aux Input"},
{"Input PGA", "MicN Switch", "MICN"},
{"Input PGA", "MicP Switch", "MICP"},
/* Inputs */
{"Aux Input", NULL, "AUX"},
};
static int wm8974_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
ARRAY_SIZE(wm8974_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
return 0;
}
struct pll_ {
unsigned int pre_div:1;
unsigned int n:4;
unsigned int k;
};
/* The size in bits of the pll divide multiplied by 10
* to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 24) * 10)
static void pll_factors(struct pll_ *pll_div,
unsigned int target, unsigned int source)
{
unsigned long long Kpart;
unsigned int K, Ndiv, Nmod;
/* There is a fixed divide by 4 in the output path */
target *= 4;
Ndiv = target / source;
if (Ndiv < 6) {
source /= 2;
pll_div->pre_div = 1;
Ndiv = target / source;
} else
pll_div->pre_div = 0;
if ((Ndiv < 6) || (Ndiv > 12))
printk(KERN_WARNING
"WM8974 N value %u outwith recommended range!\n",
Ndiv);
pll_div->n = Ndiv;
Nmod = target % source;
Kpart = FIXED_PLL_SIZE * (long long)Nmod;
do_div(Kpart, source);
K = Kpart & 0xFFFFFFFF;
/* Check if we need to round */
if ((K % 10) >= 5)
K += 5;
/* Move down to proper range now rounding is done */
K /= 10;
pll_div->k = K;
}
static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
int source, unsigned int freq_in, unsigned int freq_out)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct pll_ pll_div;
u16 reg;
if (freq_in == 0 || freq_out == 0) {
/* Clock CODEC directly from MCLK */
reg = snd_soc_read(codec, WM8974_CLOCK);
snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
/* Turn off PLL */
reg = snd_soc_read(codec, WM8974_POWER1);
snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
return 0;
}
pll_factors(&pll_div, freq_out, freq_in);
snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
reg = snd_soc_read(codec, WM8974_POWER1);
snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
/* Run CODEC from PLL instead of MCLK */
reg = snd_soc_read(codec, WM8974_CLOCK);
snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
return 0;
}
/*
* Configure WM8974 clock dividers.
*/
static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
int div_id, int div)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 reg;
switch (div_id) {
case WM8974_OPCLKDIV:
reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
snd_soc_write(codec, WM8974_GPIO, reg | div);
break;
case WM8974_MCLKDIV:
reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
snd_soc_write(codec, WM8974_CLOCK, reg | div);
break;
case WM8974_BCLKDIV:
reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
snd_soc_write(codec, WM8974_CLOCK, reg | div);
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = 0;
u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
clk |= 0x0001;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 0x0010;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0008;
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x00018;
break;
default:
return -EINVAL;
}
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0x0180;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x0100;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x0080;
break;
default:
return -EINVAL;
}
snd_soc_write(codec, WM8974_IFACE, iface);
snd_soc_write(codec, WM8974_CLOCK, clk);
return 0;
}
static int wm8974_pcm_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;
u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x0020;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x0040;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x0060;
break;
}
/* filter coefficient */
switch (params_rate(params)) {
case 8000:
adn |= 0x5 << 1;
break;
case 11025:
adn |= 0x4 << 1;
break;
case 16000:
adn |= 0x3 << 1;
break;
case 22050:
adn |= 0x2 << 1;
break;
case 32000:
adn |= 0x1 << 1;
break;
case 44100:
case 48000:
break;
}
snd_soc_write(codec, WM8974_IFACE, iface);
snd_soc_write(codec, WM8974_ADD, adn);
return 0;
}
static int wm8974_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
if (mute)
snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
else
snd_soc_write(codec, WM8974_DAC, mute_reg);
return 0;
}
/* liam need to make this lower power with dapm */
static int wm8974_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
power1 |= 0x1; /* VMID 50k */
snd_soc_write(codec, WM8974_POWER1, power1);
break;
case SND_SOC_BIAS_STANDBY:
power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
if (codec->bias_level == SND_SOC_BIAS_OFF) {
/* Initial cap charge at VMID 5k */
snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
mdelay(100);
}
power1 |= 0x2; /* VMID 500k */
snd_soc_write(codec, WM8974_POWER1, power1);
break;
case SND_SOC_BIAS_OFF:
snd_soc_write(codec, WM8974_POWER1, 0);
snd_soc_write(codec, WM8974_POWER2, 0);
snd_soc_write(codec, WM8974_POWER3, 0);
break;
}
codec->bias_level = level;
return 0;
}
#define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
#define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
static struct snd_soc_dai_ops wm8974_ops = {
.hw_params = wm8974_pcm_hw_params,
.digital_mute = wm8974_mute,
.set_fmt = wm8974_set_dai_fmt,
.set_clkdiv = wm8974_set_dai_clkdiv,
.set_pll = wm8974_set_dai_pll,
};
struct snd_soc_dai wm8974_dai = {
.name = "WM8974 HiFi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2, /* Only 1 channel of data */
.rates = WM8974_RATES,
.formats = WM8974_FORMATS,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2, /* Only 1 channel of data */
.rates = WM8974_RATES,
.formats = WM8974_FORMATS,},
.ops = &wm8974_ops,
.symmetric_rates = 1,
};
EXPORT_SYMBOL_GPL(wm8974_dai);
static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8974_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
int i;
u8 data[2];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int wm8974_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (wm8974_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = wm8974_codec;
codec = wm8974_codec;
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
dev_err(codec->dev, "failed to create pcms: %d\n", ret);
goto pcm_err;
}
snd_soc_add_controls(codec, wm8974_snd_controls,
ARRAY_SIZE(wm8974_snd_controls));
wm8974_add_widgets(codec);
return ret;
pcm_err:
return ret;
}
/* power down chip */
static int wm8974_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_wm8974 = {
.probe = wm8974_probe,
.remove = wm8974_remove,
.suspend = wm8974_suspend,
.resume = wm8974_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
static __devinit int wm8974_register(struct wm8974_priv *wm8974)
{
int ret;
struct snd_soc_codec *codec = &wm8974->codec;
if (wm8974_codec) {
dev_err(codec->dev, "Another WM8974 is registered\n");
return -EINVAL;
}
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
snd_soc_codec_set_drvdata(codec, wm8974);
codec->name = "WM8974";
codec->owner = THIS_MODULE;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->set_bias_level = wm8974_set_bias_level;
codec->dai = &wm8974_dai;
codec->num_dai = 1;
codec->reg_cache_size = WM8974_CACHEREGNUM;
codec->reg_cache = &wm8974->reg_cache;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
goto err;
}
memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
ret = wm8974_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
goto err;
}
wm8974_dai.dev = codec->dev;
wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
wm8974_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret != 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
goto err;
}
ret = snd_soc_register_dai(&wm8974_dai);
if (ret != 0) {
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
goto err_codec;
}
return 0;
err_codec:
snd_soc_unregister_codec(codec);
err:
kfree(wm8974);
return ret;
}
static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
{
wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&wm8974_dai);
snd_soc_unregister_codec(&wm8974->codec);
kfree(wm8974);
wm8974_codec = NULL;
}
static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8974_priv *wm8974;
struct snd_soc_codec *codec;
wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
if (wm8974 == NULL)
return -ENOMEM;
codec = &wm8974->codec;
codec->hw_write = (hw_write_t)i2c_master_send;
i2c_set_clientdata(i2c, wm8974);
codec->control_data = i2c;
codec->dev = &i2c->dev;
return wm8974_register(wm8974);
}
static __devexit int wm8974_i2c_remove(struct i2c_client *client)
{
struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
wm8974_unregister(wm8974);
return 0;
}
static const struct i2c_device_id wm8974_i2c_id[] = {
{ "wm8974", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
static struct i2c_driver wm8974_i2c_driver = {
.driver = {
.name = "WM8974",
.owner = THIS_MODULE,
},
.probe = wm8974_i2c_probe,
.remove = __devexit_p(wm8974_i2c_remove),
.id_table = wm8974_i2c_id,
};
static int __init wm8974_modinit(void)
{
return i2c_add_driver(&wm8974_i2c_driver);
}
module_init(wm8974_modinit);
static void __exit wm8974_exit(void)
{
i2c_del_driver(&wm8974_i2c_driver);
}
module_exit(wm8974_exit);
MODULE_DESCRIPTION("ASoC WM8974 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");
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