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ASoC WM8940 Driver

Browse source 
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Jonathan Cameron 2009-04-27 13:49:44 +00:00 committed by Mark Brown
parent a7be4d92d9
commit 0b5e92c5e0
4 changed files with 1065 additions and 0 deletions
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4
sound/soc/codecs/Kconfig
View file

@ -35,6 +35,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM8753 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8900 if I2C
select SND_SOC_WM8903 if I2C
select SND_SOC_WM8940 if I2C
select SND_SOC_WM8960 if I2C
select SND_SOC_WM8971 if I2C
select SND_SOC_WM8988 if SND_SOC_I2C_AND_SPI
@ -140,6 +141,9 @@ config SND_SOC_WM8900
config SND_SOC_WM8903
tristate
config SND_SOC_WM8940
tristate
config SND_SOC_WM8960
tristate

2
sound/soc/codecs/Makefile
View file

@ -23,6 +23,7 @@ snd-soc-wm8750-objs := wm8750.o
snd-soc-wm8753-objs := wm8753.o
snd-soc-wm8900-objs := wm8900.o
snd-soc-wm8903-objs := wm8903.o
snd-soc-wm8940-objs := wm8940.o
snd-soc-wm8960-objs := wm8960.o
snd-soc-wm8971-objs := wm8971.o
snd-soc-wm8988-objs := wm8988.o
@ -57,6 +58,7 @@ obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o
obj-$(CONFIG_SND_SOC_WM8900) += snd-soc-wm8900.o
obj-$(CONFIG_SND_SOC_WM8903) += snd-soc-wm8903.o
obj-$(CONFIG_SND_SOC_WM8971) += snd-soc-wm8971.o
obj-$(CONFIG_SND_SOC_WM8940) += snd-soc-wm8940.o
obj-$(CONFIG_SND_SOC_WM8960) += snd-soc-wm8960.o
obj-$(CONFIG_SND_SOC_WM8988) += snd-soc-wm8988.o
obj-$(CONFIG_SND_SOC_WM8990) += snd-soc-wm8990.o

955
sound/soc/codecs/wm8940.c Normal file
View file

@ -0,0 +1,955 @@
/*
* wm8940.c -- WM8940 ALSA Soc Audio driver
*
* Author: Jonathan Cameron <jic23@cam.ac.uk>
*
* Based on wm8510.c
* Copyright 2006 Wolfson Microelectronics PLC.
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
*
* 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.
*
* Not currently handled:
* Notch filter control
* AUXMode (inverting vs mixer)
* No means to obtain current gain if alc enabled.
* No use made of gpio
* Fast VMID discharge for power down
* Soft Start
* DLR and ALR Swaps not enabled
* Digital Sidetone not supported
*/
#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 <linux/spi/spi.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 "wm8940.h"
struct wm8940_priv {
unsigned int sysclk;
u16 reg_cache[WM8940_CACHEREGNUM];
struct snd_soc_codec codec;
};
static u16 wm8940_reg_defaults[] = {
0x8940, /* Soft Reset */
0x0000, /* Power 1 */
0x0000, /* Power 2 */
0x0000, /* Power 3 */
0x0010, /* Interface Control */
0x0000, /* Companding Control */
0x0140, /* Clock Control */
0x0000, /* Additional Controls */
0x0000, /* GPIO Control */
0x0002, /* Auto Increment Control */
0x0000, /* DAC Control */
0x00FF, /* DAC Volume */
0,
0,
0x0100, /* ADC Control */
0x00FF, /* ADC Volume */
0x0000, /* Notch Filter 1 Control 1 */
0x0000, /* Notch Filter 1 Control 2 */
0x0000, /* Notch Filter 2 Control 1 */
0x0000, /* Notch Filter 2 Control 2 */
0x0000, /* Notch Filter 3 Control 1 */
0x0000, /* Notch Filter 3 Control 2 */
0x0000, /* Notch Filter 4 Control 1 */
0x0000, /* Notch Filter 4 Control 2 */
0x0032, /* DAC Limit Control 1 */
0x0000, /* DAC Limit Control 2 */
0,
0,
0,
0,
0,
0,
0x0038, /* ALC Control 1 */
0x000B, /* ALC Control 2 */
0x0032, /* ALC Control 3 */
0x0000, /* Noise Gate */
0x0041, /* PLLN */
0x000C, /* PLLK1 */
0x0093, /* PLLK2 */
0x00E9, /* PLLK3 */
0,
0,
0x0030, /* ALC Control 4 */
0,
0x0002, /* Input Control */
0x0050, /* PGA Gain */
0,
0x0002, /* ADC Boost Control */
0,
0x0002, /* Output Control */
0x0000, /* Speaker Mixer Control */
0,
0,
0,
0x0079, /* Speaker Volume */
0,
0x0000, /* Mono Mixer Control */
};
static inline unsigned int wm8940_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg >= ARRAY_SIZE(wm8940_reg_defaults))
return -1;
return cache[reg];
}
static inline int wm8940_write_reg_cache(struct snd_soc_codec *codec,
u16 reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
if (reg >= ARRAY_SIZE(wm8940_reg_defaults))
return -1;
cache[reg] = value;
return 0;
}
static int wm8940_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
int ret;
u8 data[3] = { reg,
(value & 0xff00) >> 8,
(value & 0x00ff)
};
wm8940_write_reg_cache(codec, reg, value);
ret = codec->hw_write(codec->control_data, data, 3);
if (ret < 0)
return ret;
else if (ret != 3)
return -EIO;
return 0;
}
static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
static const struct soc_enum wm8940_adc_companding_enum
= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
static const struct soc_enum wm8940_dac_companding_enum
= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
static const struct soc_enum wm8940_alc_mode_enum
= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
static const struct soc_enum wm8940_mic_bias_level_enum
= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
static const struct soc_enum wm8940_filter_mode_enum
= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
static const struct snd_kcontrol_new wm8940_snd_controls[] = {
SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
6, 1, 0),
SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
3, 7, 1, wm8940_alc_max_tlv),
SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
0, 7, 0, wm8940_alc_min_tlv),
SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
0, 14, 0, wm8940_alc_tar_tlv),
SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
3, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
0, 7, 0),
SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
4, 9, 1, wm8940_lim_thresh_tlv),
SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
0, 12, 0, wm8940_lim_boost_tlv),
SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
0, 63, 0, wm8940_pga_vol_tlv),
SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
0, 255, 0, wm8940_adc_tlv),
SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
0, 255, 0, wm8940_adc_tlv),
SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
8, 1, 0, wm8940_capture_boost_vol_tlv),
SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
0, 63, 0, wm8940_spk_vol_tlv),
SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
8, 1, 1, wm8940_att_tlv),
SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
7, 1, 1, wm8940_att_tlv),
SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
};
static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
};
static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
};
DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
0, 7, 0, wm8940_boost_vol_tlv),
SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
4, 7, 0, wm8940_boost_vol_tlv),
};
static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
};
static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
&wm8940_speaker_mixer_controls[0],
ARRAY_SIZE(wm8940_speaker_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
&wm8940_mono_mixer_controls[0],
ARRAY_SIZE(wm8940_mono_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("SPKOUTP"),
SND_SOC_DAPM_OUTPUT("SPKOUTN"),
SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
&wm8940_micpga_controls[0],
ARRAY_SIZE(wm8940_micpga_controls)),
SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
&wm8940_input_boost_controls[0],
ARRAY_SIZE(wm8940_input_boost_controls)),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
SND_SOC_DAPM_INPUT("MICN"),
SND_SOC_DAPM_INPUT("MICP"),
SND_SOC_DAPM_INPUT("AUX"),
};
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"},
/* Microphone PGA */
{"Mic PGA", "MICN Switch", "MICN"},
{"Mic PGA", "MICP Switch", "MICP"},
{"Mic PGA", "AUX Switch", "AUX"},
/* Boost Mixer */
{"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
{"Boost Mixer", "Mic Volume", "MICP"},
{"Boost Mixer", "Aux Volume", "Aux Input"},
{"ADC", NULL, "Boost Mixer"},
};
static int wm8940_add_widgets(struct snd_soc_codec *codec)
{
int ret;
ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
ARRAY_SIZE(wm8940_dapm_widgets));
if (ret)
goto error_ret;
ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
if (ret)
goto error_ret;
ret = snd_soc_dapm_new_widgets(codec);
error_ret:
return ret;
}
#define wm8940_reset(c) wm8940_write(c, WM8940_SOFTRESET, 0);
static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFE67;
u16 clk = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0x1fe;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
clk |= 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
wm8940_write(codec, WM8940_CLOCK, clk);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= (2 << 3);
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= (1 << 3);
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= (3 << 3);
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= (3 << 3) | (1 << 7);
break;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= (1 << 7);
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= (1 << 8);
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= (1 << 8) | (1 << 7);
break;
}
wm8940_write(codec, WM8940_IFACE, iface);
return 0;
}
static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->codec;
u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFD9F;
u16 addcntrl = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFF1;
u16 companding = wm8940_read_reg_cache(codec,
WM8940_COMPANDINGCTL) & 0xFFDF;
int ret;
/* LoutR control */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& params_channels(params) == 2)
iface |= (1 << 9);
switch (params_rate(params)) {
case SNDRV_PCM_RATE_8000:
addcntrl |= (0x5 << 1);
break;
case SNDRV_PCM_RATE_11025:
addcntrl |= (0x4 << 1);
break;
case SNDRV_PCM_RATE_16000:
addcntrl |= (0x3 << 1);
break;
case SNDRV_PCM_RATE_22050:
addcntrl |= (0x2 << 1);
break;
case SNDRV_PCM_RATE_32000:
addcntrl |= (0x1 << 1);
break;
case SNDRV_PCM_RATE_44100:
case SNDRV_PCM_RATE_48000:
break;
}
ret = wm8940_write(codec, WM8940_ADDCNTRL, addcntrl);
if (ret)
goto error_ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
companding = companding | (1 << 5);
break;
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= (1 << 5);
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= (2 << 5);
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= (3 << 5);
break;
}
ret = wm8940_write(codec, WM8940_COMPANDINGCTL, companding);
if (ret)
goto error_ret;
ret = wm8940_write(codec, WM8940_IFACE, iface);
error_ret:
return ret;
}
static int wm8940_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = wm8940_read_reg_cache(codec, WM8940_DAC) & 0xffbf;
if (mute)
mute_reg |= 0x40;
return wm8940_write(codec, WM8940_DAC, mute_reg);
}
static int wm8940_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 val;
u16 pwr_reg = wm8940_read_reg_cache(codec, WM8940_POWER1) & 0x1F0;
int ret = 0;
switch (level) {
case SND_SOC_BIAS_ON:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
/* Enable thermal shutdown */
val = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL);
ret = wm8940_write(codec, WM8940_OUTPUTCTL, val | 0x2);
if (ret)
break;
/* set vmid to 75k */
ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1);
break;
case SND_SOC_BIAS_PREPARE:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1);
break;
case SND_SOC_BIAS_STANDBY:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
/* set vmid to 300k for standby */
ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x2);
break;
case SND_SOC_BIAS_OFF:
ret = wm8940_write(codec, WM8940_POWER1, pwr_reg);
break;
}
return ret;
}
struct pll_ {
unsigned int pre_scale:2;
unsigned int n:4;
unsigned int k;
};
static struct pll_ pll_div;
/* 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(unsigned int target, unsigned int source)
{
unsigned long long Kpart;
unsigned int K, Ndiv, Nmod;
/* The left shift ist to avoid accuracy loss when right shifting */
Ndiv = target / source;
if (Ndiv > 12) {
source <<= 1;
/* Multiply by 2 */
pll_div.pre_scale = 0;
Ndiv = target / source;
} else if (Ndiv < 3) {
source >>= 2;
/* Divide by 4 */
pll_div.pre_scale = 3;
Ndiv = target / source;
} else if (Ndiv < 6) {
source >>= 1;
/* divide by 2 */
pll_div.pre_scale = 2;
Ndiv = target / source;
} else
pll_div.pre_scale = 1;
if ((Ndiv < 6) || (Ndiv > 12))
printk(KERN_WARNING
"WM8940 N value %d outwith recommended range!d\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;
}
/* Untested at the moment */
static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai,
int pll_id, unsigned int freq_in, unsigned int freq_out)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 reg;
/* Turn off PLL */
reg = wm8940_read_reg_cache(codec, WM8940_POWER1);
wm8940_write(codec, WM8940_POWER1, reg & 0x1df);
if (freq_in == 0 || freq_out == 0) {
/* Clock CODEC directly from MCLK */
reg = wm8940_read_reg_cache(codec, WM8940_CLOCK);
wm8940_write(codec, WM8940_CLOCK, reg & 0x0ff);
/* Pll power down */
wm8940_write(codec, WM8940_PLLN, (1 << 7));
return 0;
}
/* Pll is followed by a frequency divide by 4 */
pll_factors(freq_out*4, freq_in);
if (pll_div.k)
wm8940_write(codec, WM8940_PLLN,
(pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
else /* No factional component */
wm8940_write(codec, WM8940_PLLN,
(pll_div.pre_scale << 4) | pll_div.n);
wm8940_write(codec, WM8940_PLLK1, pll_div.k >> 18);
wm8940_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
wm8940_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
/* Enable the PLL */
reg = wm8940_read_reg_cache(codec, WM8940_POWER1);
wm8940_write(codec, WM8940_POWER1, reg | 0x020);
/* Run CODEC from PLL instead of MCLK */
reg = wm8940_read_reg_cache(codec, WM8940_CLOCK);
wm8940_write(codec, WM8940_CLOCK, reg | 0x100);
return 0;
}
static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct wm8940_priv *wm8940 = codec->private_data;
switch (freq) {
case 11289600:
case 12000000:
case 12288000:
case 16934400:
case 18432000:
wm8940->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
int div_id, int div)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 reg;
int ret = 0;
switch (div_id) {
case WM8940_BCLKDIV:
reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFFEF3;
ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 2));
break;
case WM8940_MCLKDIV:
reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFF1F;
ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 5));
break;
case WM8940_OPCLKDIV:
reg = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFCF;
ret = wm8940_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
break;
}
return ret;
}
#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_ops wm8940_dai_ops = {
.hw_params = wm8940_i2s_hw_params,
.set_sysclk = wm8940_set_dai_sysclk,
.digital_mute = wm8940_mute,
.set_fmt = wm8940_set_dai_fmt,
.set_clkdiv = wm8940_set_dai_clkdiv,
.set_pll = wm8940_set_dai_pll,
};
struct snd_soc_dai wm8940_dai = {
.name = "WM8940",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8940_RATES,
.formats = WM8940_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8940_RATES,
.formats = WM8940_FORMATS,
},
.ops = &wm8940_dai_ops,
.symmetric_rates = 1,
};
EXPORT_SYMBOL_GPL(wm8940_dai);
static int wm8940_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;
return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
}
static int wm8940_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
int i;
int ret;
u8 data[3];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware
* Could use auto incremented writes to speed this up
*/
for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
data[0] = i;
data[1] = (cache[i] & 0xFF00) >> 8;
data[2] = cache[i] & 0x00FF;
ret = codec->hw_write(codec->control_data, data, 3);
if (ret < 0)
goto error_ret;
else if (ret != 3) {
ret = -EIO;
goto error_ret;
}
}
ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
if (ret)
goto error_ret;
ret = wm8940_set_bias_level(codec, codec->suspend_bias_level);
error_ret:
return ret;
}
static struct snd_soc_codec *wm8940_codec;
static int wm8940_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (wm8940_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = wm8940_codec;
codec = wm8940_codec;
mutex_init(&codec->mutex);
/* 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;
}
ret = snd_soc_add_controls(codec, wm8940_snd_controls,
ARRAY_SIZE(wm8940_snd_controls));
if (ret)
goto error_free_pcms;
ret = wm8940_add_widgets(codec);
if (ret)
goto error_free_pcms;
ret = snd_soc_init_card(socdev);
if (ret < 0) {
dev_err(codec->dev, "failed to register card: %d\n", ret);
goto error_free_pcms;
}
return ret;
error_free_pcms:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
return ret;
}
static int wm8940_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_wm8940 = {
.probe = wm8940_probe,
.remove = wm8940_remove,
.suspend = wm8940_suspend,
.resume = wm8940_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
static int wm8940_register(struct wm8940_priv *wm8940)
{
struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
struct snd_soc_codec *codec = &wm8940->codec;
int ret;
u16 reg;
if (wm8940_codec) {
dev_err(codec->dev, "Another WM8940 is registered\n");
return -EINVAL;
}
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->private_data = wm8940;
codec->name = "WM8940";
codec->owner = THIS_MODULE;
codec->read = wm8940_read_reg_cache;
codec->write = wm8940_write;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->set_bias_level = wm8940_set_bias_level;
codec->dai = &wm8940_dai;
codec->num_dai = 1;
codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
codec->reg_cache = &wm8940->reg_cache;
memcpy(codec->reg_cache, wm8940_reg_defaults,
sizeof(wm8940_reg_defaults));
ret = wm8940_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
return ret;
}
wm8940_dai.dev = codec->dev;
wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
ret = wm8940_write(codec, WM8940_POWER1, 0x180);
if (ret < 0)
return ret;
if (!pdata)
dev_warn(codec->dev, "No platform data supplied\n");
else {
reg = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL);
ret = wm8940_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
if (ret < 0)
return ret;
}
wm8940_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
return ret;
}
ret = snd_soc_register_dai(&wm8940_dai);
if (ret) {
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
snd_soc_unregister_codec(codec);
return ret;
}
return 0;
}
static void wm8940_unregister(struct wm8940_priv *wm8940)
{
wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&wm8940_dai);
snd_soc_unregister_codec(&wm8940->codec);
kfree(wm8940);
wm8940_codec = NULL;
}
static int wm8940_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8940_priv *wm8940;
struct snd_soc_codec *codec;
wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
if (wm8940 == NULL)
return -ENOMEM;
codec = &wm8940->codec;
codec->hw_write = (hw_write_t)i2c_master_send;
i2c_set_clientdata(i2c, wm8940);
codec->control_data = i2c;
codec->dev = &i2c->dev;
return wm8940_register(wm8940);
}
static int wm8940_i2c_remove(struct i2c_client *client)
{
struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
wm8940_unregister(wm8940);
return 0;
}
static const struct i2c_device_id wm8940_i2c_id[] = {
{ "wm8940", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
static struct i2c_driver wm8940_i2c_driver = {
.driver = {
.name = "WM8940 I2C Codec",
.owner = THIS_MODULE,
},
.probe = wm8940_i2c_probe,
.remove = __devexit_p(wm8940_i2c_remove),
.id_table = wm8940_i2c_id,
};
static int __init wm8940_modinit(void)
{
int ret;
ret = i2c_add_driver(&wm8940_i2c_driver);
if (ret)
printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
ret);
return ret;
}
module_init(wm8940_modinit);
static void __exit wm8940_exit(void)
{
i2c_del_driver(&wm8940_i2c_driver);
}
module_exit(wm8940_exit);
MODULE_DESCRIPTION("ASoC WM8940 driver");
MODULE_AUTHOR("Jonathan Cameron");
MODULE_LICENSE("GPL");

104
sound/soc/codecs/wm8940.h Normal file
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@ -0,0 +1,104 @@
/*
* wm8940.h -- WM8940 Soc Audio driver
*
* 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.
*/
#ifndef _WM8940_H
#define _WM8940_H
struct wm8940_setup_data {
/* Vref to analogue output resistance */
#define WM8940_VROI_1K 0
#define WM8940_VROI_30K 1
unsigned int vroi:1;
};
extern struct snd_soc_dai wm8940_dai;
extern struct snd_soc_codec_device soc_codec_dev_wm8940;
/* WM8940 register space */
#define WM8940_SOFTRESET 0x00
#define WM8940_POWER1 0x01
#define WM8940_POWER2 0x02
#define WM8940_POWER3 0x03
#define WM8940_IFACE 0x04
#define WM8940_COMPANDINGCTL 0x05
#define WM8940_CLOCK 0x06
#define WM8940_ADDCNTRL 0x07
#define WM8940_GPIO 0x08
#define WM8940_CTLINT 0x09
#define WM8940_DAC 0x0A
#define WM8940_DACVOL 0x0B
#define WM8940_ADC 0x0E
#define WM8940_ADCVOL 0x0F
#define WM8940_NOTCH1 0x10
#define WM8940_NOTCH2 0x11
#define WM8940_NOTCH3 0x12
#define WM8940_NOTCH4 0x13
#define WM8940_NOTCH5 0x14
#define WM8940_NOTCH6 0x15
#define WM8940_NOTCH7 0x16
#define WM8940_NOTCH8 0x17
#define WM8940_DACLIM1 0x18
#define WM8940_DACLIM2 0x19
#define WM8940_ALC1 0x20
#define WM8940_ALC2 0x21
#define WM8940_ALC3 0x22
#define WM8940_NOISEGATE 0x23
#define WM8940_PLLN 0x24
#define WM8940_PLLK1 0x25
#define WM8940_PLLK2 0x26
#define WM8940_PLLK3 0x27
#define WM8940_ALC4 0x2A
#define WM8940_INPUTCTL 0x2C
#define WM8940_PGAGAIN 0x2D
#define WM8940_ADCBOOST 0x2F
#define WM8940_OUTPUTCTL 0x31
#define WM8940_SPKMIX 0x32
#define WM8940_SPKVOL 0x36
#define WM8940_MONOMIX 0x38
#define WM8940_CACHEREGNUM 0x57
/* Clock divider Id's */
#define WM8940_BCLKDIV 0
#define WM8940_MCLKDIV 1
#define WM8940_OPCLKDIV 2
/* MCLK clock dividers */
#define WM8940_MCLKDIV_1 0
#define WM8940_MCLKDIV_1_5 1
#define WM8940_MCLKDIV_2 2
#define WM8940_MCLKDIV_3 3
#define WM8940_MCLKDIV_4 4
#define WM8940_MCLKDIV_6 5
#define WM8940_MCLKDIV_8 6
#define WM8940_MCLKDIV_12 7
/* BCLK clock dividers */
#define WM8940_BCLKDIV_1 0
#define WM8940_BCLKDIV_2 1
#define WM8940_BCLKDIV_4 2
#define WM8940_BCLKDIV_8 3
#define WM8940_BCLKDIV_16 4
#define WM8940_BCLKDIV_32 5
/* PLL Out Dividers */
#define WM8940_OPCLKDIV_1 0
#define WM8940_OPCLKDIV_2 1
#define WM8940_OPCLKDIV_3 2
#define WM8940_OPCLKDIV_4 3
#endif /* _WM8940_H */