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linux-stable/sound/soc/codecs/wm8750.c
Mark Brown 64089b84ab ASoC: Register non-AC97 codec DAIs 
Currently this is done at module probe time since ASoC ties in codec
device probe to the instantiation of the entire ASoC device. Subsequent
patches will refactor the codec drivers to handle probing separately.
Note that the core does not yet use this information.

AC97 is special since the codec is controlled over the AC97 link but
we want to give the machine driver a chance to set up the system before
trying to instantiate since it may need to do configuration before the
AC97 link will operate

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2008-12-09 10:49:29 +00:00

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/*
* wm8750.c -- WM8750 ALSA SoC audio driver
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <richard@openedhand.com>
*
* Based on WM8753.c
*
* 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/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 "wm8750.h"
#define WM8750_VERSION "0.12"
/* codec private data */
struct wm8750_priv {
unsigned int sysclk;
};
/*
* wm8750 register cache
* We can't read the WM8750 register space when we
* are using 2 wire for device control, so we cache them instead.
*/
static const u16 wm8750_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 */
};
/*
* read wm8750 register cache
*/
static inline unsigned int wm8750_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg > WM8750_CACHE_REGNUM)
return -1;
return cache[reg];
}
/*
* write wm8750 register cache
*/
static inline void wm8750_write_reg_cache(struct snd_soc_codec *codec,
unsigned int reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
if (reg > WM8750_CACHE_REGNUM)
return;
cache[reg] = value;
}
static int wm8750_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;
wm8750_write_reg_cache(codec, reg, value);
if (codec->hw_write(codec->control_data, data, 2) == 2)
return 0;
else
return -EIO;
}
#define wm8750_reset(c) wm8750_write(c, WM8750_RESET, 0)
/*
* WM8750 Controls
*/
static const char *wm8750_bass[] = {"Linear Control", "Adaptive Boost"};
static const char *wm8750_bass_filter[] = { "130Hz @ 48kHz", "200Hz @ 48kHz" };
static const char *wm8750_treble[] = {"8kHz", "4kHz"};
static const char *wm8750_3d_lc[] = {"200Hz", "500Hz"};
static const char *wm8750_3d_uc[] = {"2.2kHz", "1.5kHz"};
static const char *wm8750_3d_func[] = {"Capture", "Playback"};
static const char *wm8750_alc_func[] = {"Off", "Right", "Left", "Stereo"};
static const char *wm8750_ng_type[] = {"Constant PGA Gain",
"Mute ADC Output"};
static const char *wm8750_line_mux[] = {"Line 1", "Line 2", "Line 3", "PGA",
"Differential"};
static const char *wm8750_pga_sel[] = {"Line 1", "Line 2", "Line 3",
"Differential"};
static const char *wm8750_out3[] = {"VREF", "ROUT1 + Vol", "MonoOut",
"ROUT1"};
static const char *wm8750_diff_sel[] = {"Line 1", "Line 2"};
static const char *wm8750_adcpol[] = {"Normal", "L Invert", "R Invert",
"L + R Invert"};
static const char *wm8750_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
static const char *wm8750_mono_mux[] = {"Stereo", "Mono (Left)",
"Mono (Right)", "Digital Mono"};
static const struct soc_enum wm8750_enum[] = {
SOC_ENUM_SINGLE(WM8750_BASS, 7, 2, wm8750_bass),
SOC_ENUM_SINGLE(WM8750_BASS, 6, 2, wm8750_bass_filter),
SOC_ENUM_SINGLE(WM8750_TREBLE, 6, 2, wm8750_treble),
SOC_ENUM_SINGLE(WM8750_3D, 5, 2, wm8750_3d_lc),
SOC_ENUM_SINGLE(WM8750_3D, 6, 2, wm8750_3d_uc),
SOC_ENUM_SINGLE(WM8750_3D, 7, 2, wm8750_3d_func),
SOC_ENUM_SINGLE(WM8750_ALC1, 7, 4, wm8750_alc_func),
SOC_ENUM_SINGLE(WM8750_NGATE, 1, 2, wm8750_ng_type),
SOC_ENUM_SINGLE(WM8750_LOUTM1, 0, 5, wm8750_line_mux),
SOC_ENUM_SINGLE(WM8750_ROUTM1, 0, 5, wm8750_line_mux),
SOC_ENUM_SINGLE(WM8750_LADCIN, 6, 4, wm8750_pga_sel), /* 10 */
SOC_ENUM_SINGLE(WM8750_RADCIN, 6, 4, wm8750_pga_sel),
SOC_ENUM_SINGLE(WM8750_ADCTL2, 7, 4, wm8750_out3),
SOC_ENUM_SINGLE(WM8750_ADCIN, 8, 2, wm8750_diff_sel),
SOC_ENUM_SINGLE(WM8750_ADCDAC, 5, 4, wm8750_adcpol),
SOC_ENUM_SINGLE(WM8750_ADCDAC, 1, 4, wm8750_deemph),
SOC_ENUM_SINGLE(WM8750_ADCIN, 6, 4, wm8750_mono_mux), /* 16 */
};
static const struct snd_kcontrol_new wm8750_snd_controls[] = {
SOC_DOUBLE_R("Capture Volume", WM8750_LINVOL, WM8750_RINVOL, 0, 63, 0),
SOC_DOUBLE_R("Capture ZC Switch", WM8750_LINVOL, WM8750_RINVOL, 6, 1, 0),
SOC_DOUBLE_R("Capture Switch", WM8750_LINVOL, WM8750_RINVOL, 7, 1, 1),
SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8750_LOUT1V,
WM8750_ROUT1V, 7, 1, 0),
SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8750_LOUT2V,
WM8750_ROUT2V, 7, 1, 0),
SOC_ENUM("Playback De-emphasis", wm8750_enum[15]),
SOC_ENUM("Capture Polarity", wm8750_enum[14]),
SOC_SINGLE("Playback 6dB Attenuate", WM8750_ADCDAC, 7, 1, 0),
SOC_SINGLE("Capture 6dB Attenuate", WM8750_ADCDAC, 8, 1, 0),
SOC_DOUBLE_R("PCM Volume", WM8750_LDAC, WM8750_RDAC, 0, 255, 0),
SOC_ENUM("Bass Boost", wm8750_enum[0]),
SOC_ENUM("Bass Filter", wm8750_enum[1]),
SOC_SINGLE("Bass Volume", WM8750_BASS, 0, 15, 1),
SOC_SINGLE("Treble Volume", WM8750_TREBLE, 0, 15, 1),
SOC_ENUM("Treble Cut-off", wm8750_enum[2]),
SOC_SINGLE("3D Switch", WM8750_3D, 0, 1, 0),
SOC_SINGLE("3D Volume", WM8750_3D, 1, 15, 0),
SOC_ENUM("3D Lower Cut-off", wm8750_enum[3]),
SOC_ENUM("3D Upper Cut-off", wm8750_enum[4]),
SOC_ENUM("3D Mode", wm8750_enum[5]),
SOC_SINGLE("ALC Capture Target Volume", WM8750_ALC1, 0, 7, 0),
SOC_SINGLE("ALC Capture Max Volume", WM8750_ALC1, 4, 7, 0),
SOC_ENUM("ALC Capture Function", wm8750_enum[6]),
SOC_SINGLE("ALC Capture ZC Switch", WM8750_ALC2, 7, 1, 0),
SOC_SINGLE("ALC Capture Hold Time", WM8750_ALC2, 0, 15, 0),
SOC_SINGLE("ALC Capture Decay Time", WM8750_ALC3, 4, 15, 0),
SOC_SINGLE("ALC Capture Attack Time", WM8750_ALC3, 0, 15, 0),
SOC_SINGLE("ALC Capture NG Threshold", WM8750_NGATE, 3, 31, 0),
SOC_ENUM("ALC Capture NG Type", wm8750_enum[4]),
SOC_SINGLE("ALC Capture NG Switch", WM8750_NGATE, 0, 1, 0),
SOC_SINGLE("Left ADC Capture Volume", WM8750_LADC, 0, 255, 0),
SOC_SINGLE("Right ADC Capture Volume", WM8750_RADC, 0, 255, 0),
SOC_SINGLE("ZC Timeout Switch", WM8750_ADCTL1, 0, 1, 0),
SOC_SINGLE("Playback Invert Switch", WM8750_ADCTL1, 1, 1, 0),
SOC_SINGLE("Right Speaker Playback Invert Switch", WM8750_ADCTL2, 4, 1, 0),
/* Unimplemented */
/* ADCDAC Bit 0 - ADCHPD */
/* ADCDAC Bit 4 - HPOR */
/* ADCTL1 Bit 2,3 - DATSEL */
/* ADCTL1 Bit 4,5 - DMONOMIX */
/* ADCTL1 Bit 6,7 - VSEL */
/* ADCTL2 Bit 2 - LRCM */
/* ADCTL2 Bit 3 - TRI */
/* ADCTL3 Bit 5 - HPFLREN */
/* ADCTL3 Bit 6 - VROI */
/* ADCTL3 Bit 7,8 - ADCLRM */
/* ADCIN Bit 4 - LDCM */
/* ADCIN Bit 5 - RDCM */
SOC_DOUBLE_R("Mic Boost", WM8750_LADCIN, WM8750_RADCIN, 4, 3, 0),
SOC_DOUBLE_R("Bypass Left Playback Volume", WM8750_LOUTM1,
WM8750_LOUTM2, 4, 7, 1),
SOC_DOUBLE_R("Bypass Right Playback Volume", WM8750_ROUTM1,
WM8750_ROUTM2, 4, 7, 1),
SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8750_MOUTM1,
WM8750_MOUTM2, 4, 7, 1),
SOC_SINGLE("Mono Playback ZC Switch", WM8750_MOUTV, 7, 1, 0),
SOC_DOUBLE_R("Headphone Playback Volume", WM8750_LOUT1V, WM8750_ROUT1V,
0, 127, 0),
SOC_DOUBLE_R("Speaker Playback Volume", WM8750_LOUT2V, WM8750_ROUT2V,
0, 127, 0),
SOC_SINGLE("Mono Playback Volume", WM8750_MOUTV, 0, 127, 0),
};
/* add non dapm controls */
static int wm8750_add_controls(struct snd_soc_codec *codec)
{
int err, i;
for (i = 0; i < ARRAY_SIZE(wm8750_snd_controls); i++) {
err = snd_ctl_add(codec->card,
snd_soc_cnew(&wm8750_snd_controls[i],
codec, NULL));
if (err < 0)
return err;
}
return 0;
}
/*
* DAPM Controls
*/
/* Left Mixer */
static const struct snd_kcontrol_new wm8750_left_mixer_controls[] = {
SOC_DAPM_SINGLE("Playback Switch", WM8750_LOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_LOUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8750_LOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_LOUTM2, 7, 1, 0),
};
/* Right Mixer */
static const struct snd_kcontrol_new wm8750_right_mixer_controls[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8750_ROUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_ROUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", WM8750_ROUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_ROUTM2, 7, 1, 0),
};
/* Mono Mixer */
static const struct snd_kcontrol_new wm8750_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8750_MOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8750_MOUTM1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8750_MOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8750_MOUTM2, 7, 1, 0),
};
/* Left Line Mux */
static const struct snd_kcontrol_new wm8750_left_line_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[8]);
/* Right Line Mux */
static const struct snd_kcontrol_new wm8750_right_line_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[9]);
/* Left PGA Mux */
static const struct snd_kcontrol_new wm8750_left_pga_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[10]);
/* Right PGA Mux */
static const struct snd_kcontrol_new wm8750_right_pga_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[11]);
/* Out 3 Mux */
static const struct snd_kcontrol_new wm8750_out3_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[12]);
/* Differential Mux */
static const struct snd_kcontrol_new wm8750_diffmux_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[13]);
/* Mono ADC Mux */
static const struct snd_kcontrol_new wm8750_monomux_controls =
SOC_DAPM_ENUM("Route", wm8750_enum[16]);
static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
&wm8750_left_mixer_controls[0],
ARRAY_SIZE(wm8750_left_mixer_controls)),
SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
&wm8750_right_mixer_controls[0],
ARRAY_SIZE(wm8750_right_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8750_PWR2, 2, 0,
&wm8750_mono_mixer_controls[0],
ARRAY_SIZE(wm8750_mono_mixer_controls)),
SND_SOC_DAPM_PGA("Right Out 2", WM8750_PWR2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Out 2", WM8750_PWR2, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Out 1", WM8750_PWR2, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Out 1", WM8750_PWR2, 6, 0, NULL, 0),
SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8750_PWR2, 7, 0),
SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8750_PWR2, 8, 0),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8750_PWR1, 1, 0),
SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8750_PWR1, 2, 0),
SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8750_PWR1, 3, 0),
SND_SOC_DAPM_MUX("Left PGA Mux", WM8750_PWR1, 5, 0,
&wm8750_left_pga_controls),
SND_SOC_DAPM_MUX("Right PGA Mux", WM8750_PWR1, 4, 0,
&wm8750_right_pga_controls),
SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
&wm8750_left_line_controls),
SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
&wm8750_right_line_controls),
SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8750_out3_controls),
SND_SOC_DAPM_PGA("Out 3", WM8750_PWR2, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out 1", WM8750_PWR2, 2, 0, NULL, 0),
SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
&wm8750_diffmux_controls),
SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
&wm8750_monomux_controls),
SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
&wm8750_monomux_controls),
SND_SOC_DAPM_OUTPUT("LOUT1"),
SND_SOC_DAPM_OUTPUT("ROUT1"),
SND_SOC_DAPM_OUTPUT("LOUT2"),
SND_SOC_DAPM_OUTPUT("ROUT2"),
SND_SOC_DAPM_OUTPUT("MONO1"),
SND_SOC_DAPM_OUTPUT("OUT3"),
SND_SOC_DAPM_OUTPUT("VREF"),
SND_SOC_DAPM_INPUT("LINPUT1"),
SND_SOC_DAPM_INPUT("LINPUT2"),
SND_SOC_DAPM_INPUT("LINPUT3"),
SND_SOC_DAPM_INPUT("RINPUT1"),
SND_SOC_DAPM_INPUT("RINPUT2"),
SND_SOC_DAPM_INPUT("RINPUT3"),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* left mixer */
{"Left Mixer", "Playback Switch", "Left DAC"},
{"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Left Mixer", "Right Playback Switch", "Right DAC"},
{"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
/* right mixer */
{"Right Mixer", "Left Playback Switch", "Left DAC"},
{"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Right Mixer", "Playback Switch", "Right DAC"},
{"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
/* left out 1 */
{"Left Out 1", NULL, "Left Mixer"},
{"LOUT1", NULL, "Left Out 1"},
/* left out 2 */
{"Left Out 2", NULL, "Left Mixer"},
{"LOUT2", NULL, "Left Out 2"},
/* right out 1 */
{"Right Out 1", NULL, "Right Mixer"},
{"ROUT1", NULL, "Right Out 1"},
/* right out 2 */
{"Right Out 2", NULL, "Right Mixer"},
{"ROUT2", NULL, "Right Out 2"},
/* mono mixer */
{"Mono Mixer", "Left Playback Switch", "Left DAC"},
{"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
{"Mono Mixer", "Right Playback Switch", "Right DAC"},
{"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
/* mono out */
{"Mono Out 1", NULL, "Mono Mixer"},
{"MONO1", NULL, "Mono Out 1"},
/* out 3 */
{"Out3 Mux", "VREF", "VREF"},
{"Out3 Mux", "ROUT1 + Vol", "ROUT1"},
{"Out3 Mux", "ROUT1", "Right Mixer"},
{"Out3 Mux", "MonoOut", "MONO1"},
{"Out 3", NULL, "Out3 Mux"},
{"OUT3", NULL, "Out 3"},
/* Left Line Mux */
{"Left Line Mux", "Line 1", "LINPUT1"},
{"Left Line Mux", "Line 2", "LINPUT2"},
{"Left Line Mux", "Line 3", "LINPUT3"},
{"Left Line Mux", "PGA", "Left PGA Mux"},
{"Left Line Mux", "Differential", "Differential Mux"},
/* Right Line Mux */
{"Right Line Mux", "Line 1", "RINPUT1"},
{"Right Line Mux", "Line 2", "RINPUT2"},
{"Right Line Mux", "Line 3", "RINPUT3"},
{"Right Line Mux", "PGA", "Right PGA Mux"},
{"Right Line Mux", "Differential", "Differential Mux"},
/* Left PGA Mux */
{"Left PGA Mux", "Line 1", "LINPUT1"},
{"Left PGA Mux", "Line 2", "LINPUT2"},
{"Left PGA Mux", "Line 3", "LINPUT3"},
{"Left PGA Mux", "Differential", "Differential Mux"},
/* Right PGA Mux */
{"Right PGA Mux", "Line 1", "RINPUT1"},
{"Right PGA Mux", "Line 2", "RINPUT2"},
{"Right PGA Mux", "Line 3", "RINPUT3"},
{"Right PGA Mux", "Differential", "Differential Mux"},
/* Differential Mux */
{"Differential Mux", "Line 1", "LINPUT1"},
{"Differential Mux", "Line 1", "RINPUT1"},
{"Differential Mux", "Line 2", "LINPUT2"},
{"Differential Mux", "Line 2", "RINPUT2"},
/* Left ADC Mux */
{"Left ADC Mux", "Stereo", "Left PGA Mux"},
{"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
{"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
/* Right ADC Mux */
{"Right ADC Mux", "Stereo", "Right PGA Mux"},
{"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
{"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
/* ADC */
{"Left ADC", NULL, "Left ADC Mux"},
{"Right ADC", NULL, "Right ADC Mux"},
};
static int wm8750_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
ARRAY_SIZE(wm8750_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
snd_soc_dapm_new_widgets(codec);
return 0;
}
struct _coeff_div {
u32 mclk;
u32 rate;
u16 fs;
u8 sr:5;
u8 usb:1;
};
/* codec hifi mclk clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
/* 8k */
{12288000, 8000, 1536, 0x6, 0x0},
{11289600, 8000, 1408, 0x16, 0x0},
{18432000, 8000, 2304, 0x7, 0x0},
{16934400, 8000, 2112, 0x17, 0x0},
{12000000, 8000, 1500, 0x6, 0x1},
/* 11.025k */
{11289600, 11025, 1024, 0x18, 0x0},
{16934400, 11025, 1536, 0x19, 0x0},
{12000000, 11025, 1088, 0x19, 0x1},
/* 16k */
{12288000, 16000, 768, 0xa, 0x0},
{18432000, 16000, 1152, 0xb, 0x0},
{12000000, 16000, 750, 0xa, 0x1},
/* 22.05k */
{11289600, 22050, 512, 0x1a, 0x0},
{16934400, 22050, 768, 0x1b, 0x0},
{12000000, 22050, 544, 0x1b, 0x1},
/* 32k */
{12288000, 32000, 384, 0xc, 0x0},
{18432000, 32000, 576, 0xd, 0x0},
{12000000, 32000, 375, 0xa, 0x1},
/* 44.1k */
{11289600, 44100, 256, 0x10, 0x0},
{16934400, 44100, 384, 0x11, 0x0},
{12000000, 44100, 272, 0x11, 0x1},
/* 48k */
{12288000, 48000, 256, 0x0, 0x0},
{18432000, 48000, 384, 0x1, 0x0},
{12000000, 48000, 250, 0x0, 0x1},
/* 88.2k */
{11289600, 88200, 128, 0x1e, 0x0},
{16934400, 88200, 192, 0x1f, 0x0},
{12000000, 88200, 136, 0x1f, 0x1},
/* 96k */
{12288000, 96000, 128, 0xe, 0x0},
{18432000, 96000, 192, 0xf, 0x0},
{12000000, 96000, 125, 0xe, 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;
}
printk(KERN_ERR "wm8750: could not get coeff for mclk %d @ rate %d\n",
mclk, rate);
return -EINVAL;
}
static int wm8750_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 wm8750_priv *wm8750 = codec->private_data;
switch (freq) {
case 11289600:
case 12000000:
case 12288000:
case 16934400:
case 18432000:
wm8750->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8750_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = 0;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
iface = 0x0040;
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 |= 0x0002;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x0001;
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= 0x0003;
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= 0x0013;
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 |= 0x0090;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x0080;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x0010;
break;
default:
return -EINVAL;
}
wm8750_write(codec, WM8750_IFACE, iface);
return 0;
}
static int wm8750_pcm_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->codec;
struct wm8750_priv *wm8750 = codec->private_data;
u16 iface = wm8750_read_reg_cache(codec, WM8750_IFACE) & 0x1f3;
u16 srate = wm8750_read_reg_cache(codec, WM8750_SRATE) & 0x1c0;
int coeff = get_coeff(wm8750->sysclk, params_rate(params));
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= 0x0004;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= 0x0008;
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= 0x000c;
break;
}
/* set iface & srate */
wm8750_write(codec, WM8750_IFACE, iface);
if (coeff >= 0)
wm8750_write(codec, WM8750_SRATE, srate |
(coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
return 0;
}
static int wm8750_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = wm8750_read_reg_cache(codec, WM8750_ADCDAC) & 0xfff7;
if (mute)
wm8750_write(codec, WM8750_ADCDAC, mute_reg | 0x8);
else
wm8750_write(codec, WM8750_ADCDAC, mute_reg);
return 0;
}
static int wm8750_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 pwr_reg = wm8750_read_reg_cache(codec, WM8750_PWR1) & 0xfe3e;
switch (level) {
case SND_SOC_BIAS_ON:
/* set vmid to 50k and unmute dac */
wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x00c0);
break;
case SND_SOC_BIAS_PREPARE:
/* set vmid to 5k for quick power up */
wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x01c1);
break;
case SND_SOC_BIAS_STANDBY:
/* mute dac and set vmid to 500k, enable VREF */
wm8750_write(codec, WM8750_PWR1, pwr_reg | 0x0141);
break;
case SND_SOC_BIAS_OFF:
wm8750_write(codec, WM8750_PWR1, 0x0001);
break;
}
codec->bias_level = level;
return 0;
}
#define WM8750_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define WM8750_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)
struct snd_soc_dai wm8750_dai = {
.name = "WM8750",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8750_RATES,
.formats = WM8750_FORMATS,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8750_RATES,
.formats = WM8750_FORMATS,},
.ops = {
.hw_params = wm8750_pcm_hw_params,
.digital_mute = wm8750_mute,
.set_fmt = wm8750_set_dai_fmt,
.set_sysclk = wm8750_set_dai_sysclk,
},
};
EXPORT_SYMBOL_GPL(wm8750_dai);
static void wm8750_work(struct work_struct *work)
{
struct snd_soc_codec *codec =
container_of(work, struct snd_soc_codec, delayed_work.work);
wm8750_set_bias_level(codec, codec->bias_level);
}
static int wm8750_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8750_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
int i;
u8 data[2];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8750_reg); i++) {
if (i == WM8750_RESET)
continue;
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
wm8750_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* charge wm8750 caps */
if (codec->suspend_bias_level == SND_SOC_BIAS_ON) {
wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
codec->bias_level = SND_SOC_BIAS_ON;
schedule_delayed_work(&codec->delayed_work,
msecs_to_jiffies(1000));
}
return 0;
}
/*
* initialise the WM8750 driver
* register the mixer and dsp interfaces with the kernel
*/
static int wm8750_init(struct snd_soc_device *socdev)
{
struct snd_soc_codec *codec = socdev->codec;
int reg, ret = 0;
codec->name = "WM8750";
codec->owner = THIS_MODULE;
codec->read = wm8750_read_reg_cache;
codec->write = wm8750_write;
codec->set_bias_level = wm8750_set_bias_level;
codec->dai = &wm8750_dai;
codec->num_dai = 1;
codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
if (codec->reg_cache == NULL)
return -ENOMEM;
wm8750_reset(codec);
/* register pcms */
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
printk(KERN_ERR "wm8750: failed to create pcms\n");
goto pcm_err;
}
/* charge output caps */
wm8750_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
codec->bias_level = SND_SOC_BIAS_STANDBY;
schedule_delayed_work(&codec->delayed_work, msecs_to_jiffies(1000));
/* set the update bits */
reg = wm8750_read_reg_cache(codec, WM8750_LDAC);
wm8750_write(codec, WM8750_LDAC, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_RDAC);
wm8750_write(codec, WM8750_RDAC, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_LOUT1V);
wm8750_write(codec, WM8750_LOUT1V, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_ROUT1V);
wm8750_write(codec, WM8750_ROUT1V, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_LOUT2V);
wm8750_write(codec, WM8750_LOUT2V, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_ROUT2V);
wm8750_write(codec, WM8750_ROUT2V, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_LINVOL);
wm8750_write(codec, WM8750_LINVOL, reg | 0x0100);
reg = wm8750_read_reg_cache(codec, WM8750_RINVOL);
wm8750_write(codec, WM8750_RINVOL, reg | 0x0100);
wm8750_add_controls(codec);
wm8750_add_widgets(codec);
ret = snd_soc_init_card(socdev);
if (ret < 0) {
printk(KERN_ERR "wm8750: failed to register card\n");
goto card_err;
}
return ret;
card_err:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
kfree(codec->reg_cache);
return ret;
}
/* If the i2c layer weren't so broken, we could pass this kind of data
around */
static struct snd_soc_device *wm8750_socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
* WM8750 2 wire address is determined by GPIO5
* state during powerup.
* low = 0x1a
* high = 0x1b
*/
static int wm8750_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct snd_soc_device *socdev = wm8750_socdev;
struct snd_soc_codec *codec = socdev->codec;
int ret;
i2c_set_clientdata(i2c, codec);
codec->control_data = i2c;
ret = wm8750_init(socdev);
if (ret < 0)
pr_err("failed to initialise WM8750\n");
return ret;
}
static int wm8750_i2c_remove(struct i2c_client *client)
{
struct snd_soc_codec *codec = i2c_get_clientdata(client);
kfree(codec->reg_cache);
return 0;
}
static const struct i2c_device_id wm8750_i2c_id[] = {
{ "wm8750", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
static struct i2c_driver wm8750_i2c_driver = {
.driver = {
.name = "WM8750 I2C Codec",
.owner = THIS_MODULE,
},
.probe = wm8750_i2c_probe,
.remove = wm8750_i2c_remove,
.id_table = wm8750_i2c_id,
};
static int wm8750_add_i2c_device(struct platform_device *pdev,
const struct wm8750_setup_data *setup)
{
struct i2c_board_info info;
struct i2c_adapter *adapter;
struct i2c_client *client;
int ret;
ret = i2c_add_driver(&wm8750_i2c_driver);
if (ret != 0) {
dev_err(&pdev->dev, "can't add i2c driver\n");
return ret;
}
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = setup->i2c_address;
strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
adapter = i2c_get_adapter(setup->i2c_bus);
if (!adapter) {
dev_err(&pdev->dev, "can't get i2c adapter %d\n",
setup->i2c_bus);
goto err_driver;
}
client = i2c_new_device(adapter, &info);
i2c_put_adapter(adapter);
if (!client) {
dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
(unsigned int)info.addr);
goto err_driver;
}
return 0;
err_driver:
i2c_del_driver(&wm8750_i2c_driver);
return -ENODEV;
}
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8750_spi_probe(struct spi_device *spi)
{
struct snd_soc_device *socdev = wm8750_socdev;
struct snd_soc_codec *codec = socdev->codec;
int ret;
codec->control_data = spi;
ret = wm8750_init(socdev);
if (ret < 0)
dev_err(&spi->dev, "failed to initialise WM8750\n");
return ret;
}
static int __devexit wm8750_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver wm8750_spi_driver = {
.driver = {
.name = "wm8750",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8750_spi_probe,
.remove = __devexit_p(wm8750_spi_remove),
};
static int wm8750_spi_write(struct spi_device *spi, const char *data, int len)
{
struct spi_transfer t;
struct spi_message m;
u8 msg[2];
if (len <= 0)
return 0;
msg[0] = data[0];
msg[1] = data[1];
spi_message_init(&m);
memset(&t, 0, (sizeof t));
t.tx_buf = &msg[0];
t.len = len;
spi_message_add_tail(&t, &m);
spi_sync(spi, &m);
return len;
}
#endif
static int wm8750_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct wm8750_setup_data *setup = socdev->codec_data;
struct snd_soc_codec *codec;
struct wm8750_priv *wm8750;
int ret;
pr_info("WM8750 Audio Codec %s", WM8750_VERSION);
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
wm8750 = kzalloc(sizeof(struct wm8750_priv), GFP_KERNEL);
if (wm8750 == NULL) {
kfree(codec);
return -ENOMEM;
}
codec->private_data = wm8750;
socdev->codec = codec;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
wm8750_socdev = socdev;
INIT_DELAYED_WORK(&codec->delayed_work, wm8750_work);
ret = -ENODEV;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
if (setup->i2c_address) {
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8750_add_i2c_device(pdev, setup);
}
#endif
#if defined(CONFIG_SPI_MASTER)
if (setup->spi) {
codec->hw_write = (hw_write_t)wm8750_spi_write;
ret = spi_register_driver(&wm8750_spi_driver);
if (ret != 0)
printk(KERN_ERR "can't add spi driver");
}
#endif
if (ret != 0) {
kfree(codec->private_data);
kfree(codec);
}
return ret;
}
/*
* This function forces any delayed work to be queued and run.
*/
static int run_delayed_work(struct delayed_work *dwork)
{
int ret;
/* cancel any work waiting to be queued. */
ret = cancel_delayed_work(dwork);
/* if there was any work waiting then we run it now and
* wait for it's completion */
if (ret) {
schedule_delayed_work(dwork, 0);
flush_scheduled_work();
}
return ret;
}
/* power down chip */
static int wm8750_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->codec;
if (codec->control_data)
wm8750_set_bias_level(codec, SND_SOC_BIAS_OFF);
run_delayed_work(&codec->delayed_work);
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8750_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8750_spi_driver);
#endif
kfree(codec->private_data);
kfree(codec);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_wm8750 = {
.probe = wm8750_probe,
.remove = wm8750_remove,
.suspend = wm8750_suspend,
.resume = wm8750_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8750);
static int __devinit wm8750_modinit(void)
{
return snd_soc_register_dai(&wm8750_dai);
}
module_init(wm8750_modinit);
static void __exit wm8750_exit(void)
{
snd_soc_unregister_dai(&wm8750_dai);
}
module_exit(wm8750_exit);
MODULE_DESCRIPTION("ASoC WM8750 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");
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