mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-21 01:51:18 +00:00
Code Issues Releases Wiki Activity
linux-stable/sound/soc/codecs/wm8960.c
Mark Brown 913d7b4cc0 ASoC: Add support for WM8960 capless mode 
The WM8960 headphone outputs can be run in capless mode with OUT3
used to drive a pseudo ground for the headphone drivers. In this
mode the mono mixer is not used, the mixer should be turned on
in concert with the headphone output drivers and the device bias
levels are managed differently.

Also tweak the existing bias management to remove the use of active
discharge while we're at it since that's often audible.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-03-03 17:08:43 +00:00

1065 lines
29 KiB
C
Raw Blame History

/*
* wm8960.c -- WM8960 ALSA SoC Audio driver
*
* Author: Liam Girdwood
*
* 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 <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 <sound/wm8960.h>
#include "wm8960.h"
#define AUDIO_NAME "wm8960"
struct snd_soc_codec_device soc_codec_dev_wm8960;
/* R25 - Power 1 */
#define WM8960_VMID_MASK 0x180
#define WM8960_VREF 0x40
/* R26 - Power 2 */
#define WM8960_PWR2_LOUT1 0x40
#define WM8960_PWR2_ROUT1 0x20
#define WM8960_PWR2_OUT3 0x02
/* R28 - Anti-pop 1 */
#define WM8960_POBCTRL 0x80
#define WM8960_BUFDCOPEN 0x10
#define WM8960_BUFIOEN 0x08
#define WM8960_SOFT_ST 0x04
#define WM8960_HPSTBY 0x01
/* R29 - Anti-pop 2 */
#define WM8960_DISOP 0x40
#define WM8960_DRES_MASK 0x30
/*
* wm8960 register cache
* We can't read the WM8960 register space when we are
* using 2 wire for device control, so we cache them instead.
*/
static const u16 wm8960_reg[WM8960_CACHEREGNUM] = {
0x0097, 0x0097, 0x0000, 0x0000,
0x0000, 0x0008, 0x0000, 0x000a,
0x01c0, 0x0000, 0x00ff, 0x00ff,
0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x007b, 0x0100, 0x0032,
0x0000, 0x00c3, 0x00c3, 0x01c0,
0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000,
0x0100, 0x0100, 0x0050, 0x0050,
0x0050, 0x0050, 0x0000, 0x0000,
0x0000, 0x0000, 0x0040, 0x0000,
0x0000, 0x0050, 0x0050, 0x0000,
0x0002, 0x0037, 0x004d, 0x0080,
0x0008, 0x0031, 0x0026, 0x00e9,
};
struct wm8960_priv {
u16 reg_cache[WM8960_CACHEREGNUM];
struct snd_soc_codec codec;
struct snd_soc_dapm_widget *lout1;
struct snd_soc_dapm_widget *rout1;
struct snd_soc_dapm_widget *out3;
};
#define wm8960_reset(c) snd_soc_write(c, WM8960_RESET, 0)
/* enumerated controls */
static const char *wm8960_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted",
"Right Inverted", "Stereo Inversion"};
static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
static const struct soc_enum wm8960_enum[] = {
SOC_ENUM_SINGLE(WM8960_DACCTL1, 1, 4, wm8960_deemph),
SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity),
SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff),
SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
};
static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1);
static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0);
static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
static const struct snd_kcontrol_new wm8960_snd_controls[] = {
SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL,
0, 63, 0, adc_tlv),
SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL,
6, 1, 0),
SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL,
7, 1, 0),
SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC,
0, 255, 0, dac_tlv),
SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1,
0, 127, 0, out_tlv),
SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1,
7, 1, 0),
SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2,
0, 127, 0, out_tlv),
SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2,
7, 1, 0),
SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0),
SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0),
SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0),
SOC_ENUM("ADC Polarity", wm8960_enum[1]),
SOC_ENUM("Playback De-emphasis", wm8960_enum[0]),
SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0),
SOC_ENUM("DAC Polarity", wm8960_enum[2]),
SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[3]),
SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[4]),
SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0),
SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0),
SOC_ENUM("ALC Function", wm8960_enum[5]),
SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0),
SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1),
SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0),
SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0),
SOC_ENUM("ALC Mode", wm8960_enum[6]),
SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0),
SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0),
SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0),
SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0),
SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH,
0, 127, 0),
SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume",
WM8960_BYPASS1, 4, 7, 1, bypass_tlv),
SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume",
WM8960_LOUTMIX, 4, 7, 1, bypass_tlv),
SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
};
static const struct snd_kcontrol_new wm8960_lin_boost[] = {
SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0),
SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0),
SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0),
};
static const struct snd_kcontrol_new wm8960_lin[] = {
SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0),
};
static const struct snd_kcontrol_new wm8960_rin_boost[] = {
SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0),
SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0),
SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0),
};
static const struct snd_kcontrol_new wm8960_rin[] = {
SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0),
};
static const struct snd_kcontrol_new wm8960_loutput_mixer[] = {
SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0),
SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0),
SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0),
};
static const struct snd_kcontrol_new wm8960_routput_mixer[] = {
SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0),
SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0),
SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0),
};
static const struct snd_kcontrol_new wm8960_mono_out[] = {
SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0),
};
static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("LINPUT1"),
SND_SOC_DAPM_INPUT("RINPUT1"),
SND_SOC_DAPM_INPUT("LINPUT2"),
SND_SOC_DAPM_INPUT("RINPUT2"),
SND_SOC_DAPM_INPUT("LINPUT3"),
SND_SOC_DAPM_INPUT("RINPUT3"),
SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0),
SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0,
wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)),
SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0,
wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)),
SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0,
wm8960_lin, ARRAY_SIZE(wm8960_lin)),
SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0,
wm8960_rin, ARRAY_SIZE(wm8960_rin)),
SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0),
SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0),
SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0),
SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0),
SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0,
&wm8960_loutput_mixer[0],
ARRAY_SIZE(wm8960_loutput_mixer)),
SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0,
&wm8960_routput_mixer[0],
ARRAY_SIZE(wm8960_routput_mixer)),
SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("SPK_LP"),
SND_SOC_DAPM_OUTPUT("SPK_LN"),
SND_SOC_DAPM_OUTPUT("HP_L"),
SND_SOC_DAPM_OUTPUT("HP_R"),
SND_SOC_DAPM_OUTPUT("SPK_RP"),
SND_SOC_DAPM_OUTPUT("SPK_RN"),
SND_SOC_DAPM_OUTPUT("OUT3"),
};
static const struct snd_soc_dapm_widget wm8960_dapm_widgets_out3[] = {
SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0,
&wm8960_mono_out[0],
ARRAY_SIZE(wm8960_mono_out)),
};
/* Represent OUT3 as a PGA so that it gets turned on with LOUT1/ROUT1 */
static const struct snd_soc_dapm_widget wm8960_dapm_widgets_capless[] = {
SND_SOC_DAPM_PGA("OUT3 VMID", WM8960_POWER2, 1, 0, NULL, 0),
};
static const struct snd_soc_dapm_route audio_paths[] = {
{ "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" },
{ "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" },
{ "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" },
{ "Left Input Mixer", "Boost Switch", "Left Boost Mixer", },
{ "Left Input Mixer", NULL, "LINPUT1", }, /* Really Boost Switch */
{ "Left Input Mixer", NULL, "LINPUT2" },
{ "Left Input Mixer", NULL, "LINPUT3" },
{ "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" },
{ "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" },
{ "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" },
{ "Right Input Mixer", "Boost Switch", "Right Boost Mixer", },
{ "Right Input Mixer", NULL, "RINPUT1", }, /* Really Boost Switch */
{ "Right Input Mixer", NULL, "RINPUT2" },
{ "Right Input Mixer", NULL, "LINPUT3" },
{ "Left ADC", NULL, "Left Input Mixer" },
{ "Right ADC", NULL, "Right Input Mixer" },
{ "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" },
{ "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} ,
{ "Left Output Mixer", "PCM Playback Switch", "Left DAC" },
{ "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" },
{ "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } ,
{ "Right Output Mixer", "PCM Playback Switch", "Right DAC" },
{ "LOUT1 PGA", NULL, "Left Output Mixer" },
{ "ROUT1 PGA", NULL, "Right Output Mixer" },
{ "HP_L", NULL, "LOUT1 PGA" },
{ "HP_R", NULL, "ROUT1 PGA" },
{ "Left Speaker PGA", NULL, "Left Output Mixer" },
{ "Right Speaker PGA", NULL, "Right Output Mixer" },
{ "Left Speaker Output", NULL, "Left Speaker PGA" },
{ "Right Speaker Output", NULL, "Right Speaker PGA" },
{ "SPK_LN", NULL, "Left Speaker Output" },
{ "SPK_LP", NULL, "Left Speaker Output" },
{ "SPK_RN", NULL, "Right Speaker Output" },
{ "SPK_RP", NULL, "Right Speaker Output" },
};
static const struct snd_soc_dapm_route audio_paths_out3[] = {
{ "Mono Output Mixer", "Left Switch", "Left Output Mixer" },
{ "Mono Output Mixer", "Right Switch", "Right Output Mixer" },
{ "OUT3", NULL, "Mono Output Mixer", }
};
static const struct snd_soc_dapm_route audio_paths_capless[] = {
{ "HP_L", NULL, "OUT3 VMID" },
{ "HP_R", NULL, "OUT3 VMID" },
{ "OUT3 VMID", NULL, "Left Output Mixer" },
{ "OUT3 VMID", NULL, "Right Output Mixer" },
};
static int wm8960_add_widgets(struct snd_soc_codec *codec)
{
struct wm8960_data *pdata = codec->dev->platform_data;
struct wm8960_priv *wm8960 = codec->private_data;
struct snd_soc_dapm_widget *w;
snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets,
ARRAY_SIZE(wm8960_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
/* In capless mode OUT3 is used to provide VMID for the
* headphone outputs, otherwise it is used as a mono mixer.
*/
if (pdata && pdata->capless) {
snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets_capless,
ARRAY_SIZE(wm8960_dapm_widgets_capless));
snd_soc_dapm_add_routes(codec, audio_paths_capless,
ARRAY_SIZE(audio_paths_capless));
} else {
snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets_out3,
ARRAY_SIZE(wm8960_dapm_widgets_out3));
snd_soc_dapm_add_routes(codec, audio_paths_out3,
ARRAY_SIZE(audio_paths_out3));
}
/* We need to power up the headphone output stage out of
* sequence for capless mode. To save scanning the widget
* list each time to find the desired power state do so now
* and save the result.
*/
list_for_each_entry(w, &codec->dapm_widgets, list) {
if (strcmp(w->name, "LOUT1 PGA") == 0)
wm8960->lout1 = w;
if (strcmp(w->name, "ROUT1 PGA") == 0)
wm8960->rout1 = w;
if (strcmp(w->name, "OUT3 VMID") == 0)
wm8960->out3 = w;
}
return 0;
}
static int wm8960_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;
}
/* set iface */
snd_soc_write(codec, WM8960_IFACE1, iface);
return 0;
}
static int wm8960_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 = snd_soc_read(codec, WM8960_IFACE1) & 0xfff3;
/* 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;
}
/* set iface */
snd_soc_write(codec, WM8960_IFACE1, iface);
return 0;
}
static int wm8960_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8960_DACCTL1) & 0xfff7;
if (mute)
snd_soc_write(codec, WM8960_DACCTL1, mute_reg | 0x8);
else
snd_soc_write(codec, WM8960_DACCTL1, mute_reg);
return 0;
}
static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 reg;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
/* Set VMID to 2x50k */
reg = snd_soc_read(codec, WM8960_POWER1);
reg &= ~0x180;
reg |= 0x80;
snd_soc_write(codec, WM8960_POWER1, reg);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->bias_level == SND_SOC_BIAS_OFF) {
/* Enable anti-pop features */
snd_soc_write(codec, WM8960_APOP1,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN | WM8960_BUFIOEN);
/* Enable & ramp VMID at 2x50k */
reg = snd_soc_read(codec, WM8960_POWER1);
reg |= 0x80;
snd_soc_write(codec, WM8960_POWER1, reg);
msleep(100);
/* Enable VREF */
snd_soc_write(codec, WM8960_POWER1, reg | WM8960_VREF);
/* Disable anti-pop features */
snd_soc_write(codec, WM8960_APOP1, WM8960_BUFIOEN);
}
/* Set VMID to 2x250k */
reg = snd_soc_read(codec, WM8960_POWER1);
reg &= ~0x180;
reg |= 0x100;
snd_soc_write(codec, WM8960_POWER1, reg);
break;
case SND_SOC_BIAS_OFF:
/* Enable anti-pop features */
snd_soc_write(codec, WM8960_APOP1,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN | WM8960_BUFIOEN);
/* Disable VMID and VREF, let them discharge */
snd_soc_write(codec, WM8960_POWER1, 0);
msleep(600);
break;
}
codec->bias_level = level;
return 0;
}
static int wm8960_set_bias_level_capless(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8960_priv *wm8960 = codec->private_data;
int reg;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
switch (codec->bias_level) {
case SND_SOC_BIAS_STANDBY:
/* Enable anti pop mode */
snd_soc_update_bits(codec, WM8960_APOP1,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN);
/* Enable LOUT1, ROUT1 and OUT3 if they're enabled */
reg = 0;
if (wm8960->lout1 && wm8960->lout1->power)
reg |= WM8960_PWR2_LOUT1;
if (wm8960->rout1 && wm8960->rout1->power)
reg |= WM8960_PWR2_ROUT1;
if (wm8960->out3 && wm8960->out3->power)
reg |= WM8960_PWR2_OUT3;
snd_soc_update_bits(codec, WM8960_POWER2,
WM8960_PWR2_LOUT1 |
WM8960_PWR2_ROUT1 |
WM8960_PWR2_OUT3, reg);
/* Enable VMID at 2*50k */
snd_soc_update_bits(codec, WM8960_POWER1,
WM8960_VMID_MASK, 0x80);
/* Ramp */
msleep(100);
/* Enable VREF */
snd_soc_update_bits(codec, WM8960_POWER1,
WM8960_VREF, WM8960_VREF);
msleep(100);
break;
case SND_SOC_BIAS_ON:
/* Enable anti-pop mode */
snd_soc_update_bits(codec, WM8960_APOP1,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN);
/* Disable VMID and VREF */
snd_soc_update_bits(codec, WM8960_POWER1,
WM8960_VREF | WM8960_VMID_MASK, 0);
break;
default:
break;
}
break;
case SND_SOC_BIAS_STANDBY:
switch (codec->bias_level) {
case SND_SOC_BIAS_PREPARE:
/* Disable HP discharge */
snd_soc_update_bits(codec, WM8960_APOP2,
WM8960_DISOP | WM8960_DRES_MASK,
0);
/* Disable anti-pop features */
snd_soc_update_bits(codec, WM8960_APOP1,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN,
WM8960_POBCTRL | WM8960_SOFT_ST |
WM8960_BUFDCOPEN);
break;
default:
break;
}
break;
case SND_SOC_BIAS_OFF:
break;
}
codec->bias_level = level;
return 0;
}
/* PLL divisors */
struct _pll_div {
u32 pre_div:1;
u32 n:4;
u32 k:24;
};
/* The size in bits of the pll divide multiplied by 10
* to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 24) * 10)
static int pll_factors(unsigned int source, unsigned int target,
struct _pll_div *pll_div)
{
unsigned long long Kpart;
unsigned int K, Ndiv, Nmod;
pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target);
/* Scale up target to PLL operating frequency */
target *= 4;
Ndiv = target / source;
if (Ndiv < 6) {
source >>= 1;
pll_div->pre_div = 1;
Ndiv = target / source;
} else
pll_div->pre_div = 0;
if ((Ndiv < 6) || (Ndiv > 12)) {
pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv);
return -EINVAL;
}
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;
pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n",
pll_div->n, pll_div->k, pll_div->pre_div);
return 0;
}
static int wm8960_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;
u16 reg;
static struct _pll_div pll_div;
int ret;
if (freq_in && freq_out) {
ret = pll_factors(freq_in, freq_out, &pll_div);
if (ret != 0)
return ret;
}
/* Disable the PLL: even if we are changing the frequency the
* PLL needs to be disabled while we do so. */
snd_soc_write(codec, WM8960_CLOCK1,
snd_soc_read(codec, WM8960_CLOCK1) & ~1);
snd_soc_write(codec, WM8960_POWER2,
snd_soc_read(codec, WM8960_POWER2) & ~1);
if (!freq_in || !freq_out)
return 0;
reg = snd_soc_read(codec, WM8960_PLL1) & ~0x3f;
reg |= pll_div.pre_div << 4;
reg |= pll_div.n;
if (pll_div.k) {
reg |= 0x20;
snd_soc_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f);
snd_soc_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff);
snd_soc_write(codec, WM8960_PLL4, pll_div.k & 0x1ff);
}
snd_soc_write(codec, WM8960_PLL1, reg);
/* Turn it on */
snd_soc_write(codec, WM8960_POWER2,
snd_soc_read(codec, WM8960_POWER2) | 1);
msleep(250);
snd_soc_write(codec, WM8960_CLOCK1,
snd_soc_read(codec, WM8960_CLOCK1) | 1);
return 0;
}
static int wm8960_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 WM8960_SYSCLKSEL:
reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1fe;
snd_soc_write(codec, WM8960_CLOCK1, reg | div);
break;
case WM8960_SYSCLKDIV:
reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1f9;
snd_soc_write(codec, WM8960_CLOCK1, reg | div);
break;
case WM8960_DACDIV:
reg = snd_soc_read(codec, WM8960_CLOCK1) & 0x1c7;
snd_soc_write(codec, WM8960_CLOCK1, reg | div);
break;
case WM8960_OPCLKDIV:
reg = snd_soc_read(codec, WM8960_PLL1) & 0x03f;
snd_soc_write(codec, WM8960_PLL1, reg | div);
break;
case WM8960_DCLKDIV:
reg = snd_soc_read(codec, WM8960_CLOCK2) & 0x03f;
snd_soc_write(codec, WM8960_CLOCK2, reg | div);
break;
case WM8960_TOCLKSEL:
reg = snd_soc_read(codec, WM8960_ADDCTL1) & 0x1fd;
snd_soc_write(codec, WM8960_ADDCTL1, reg | div);
break;
default:
return -EINVAL;
}
return 0;
}
#define WM8960_RATES SNDRV_PCM_RATE_8000_48000
#define WM8960_FORMATS \
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE)
static struct snd_soc_dai_ops wm8960_dai_ops = {
.hw_params = wm8960_hw_params,
.digital_mute = wm8960_mute,
.set_fmt = wm8960_set_dai_fmt,
.set_clkdiv = wm8960_set_dai_clkdiv,
.set_pll = wm8960_set_dai_pll,
};
struct snd_soc_dai wm8960_dai = {
.name = "WM8960",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8960_RATES,
.formats = WM8960_FORMATS,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8960_RATES,
.formats = WM8960_FORMATS,},
.ops = &wm8960_dai_ops,
.symmetric_rates = 1,
};
EXPORT_SYMBOL_GPL(wm8960_dai);
static int wm8960_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;
codec->set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8960_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(wm8960_reg); i++) {
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);
}
codec->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
codec->set_bias_level(codec, codec->suspend_bias_level);
return 0;
}
static struct snd_soc_codec *wm8960_codec;
static int wm8960_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (wm8960_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = wm8960_codec;
codec = wm8960_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, wm8960_snd_controls,
ARRAY_SIZE(wm8960_snd_controls));
wm8960_add_widgets(codec);
return ret;
pcm_err:
return ret;
}
/* power down chip */
static int wm8960_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_wm8960 = {
.probe = wm8960_probe,
.remove = wm8960_remove,
.suspend = wm8960_suspend,
.resume = wm8960_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960);
static int wm8960_register(struct wm8960_priv *wm8960,
enum snd_soc_control_type control)
{
struct wm8960_data *pdata = wm8960->codec.dev->platform_data;
struct snd_soc_codec *codec = &wm8960->codec;
int ret;
u16 reg;
if (wm8960_codec) {
dev_err(codec->dev, "Another WM8960 is registered\n");
ret = -EINVAL;
goto err;
}
codec->set_bias_level = wm8960_set_bias_level_out3;
if (!pdata) {
dev_warn(codec->dev, "No platform data supplied\n");
} else {
if (pdata->dres > WM8960_DRES_MAX) {
dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres);
pdata->dres = 0;
}
if (pdata->capless)
codec->set_bias_level = wm8960_set_bias_level_capless;
}
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->private_data = wm8960;
codec->name = "WM8960";
codec->owner = THIS_MODULE;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->dai = &wm8960_dai;
codec->num_dai = 1;
codec->reg_cache_size = WM8960_CACHEREGNUM;
codec->reg_cache = &wm8960->reg_cache;
memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg));
ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
goto err;
}
ret = wm8960_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
goto err;
}
wm8960_dai.dev = codec->dev;
codec->set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Latch the update bits */
reg = snd_soc_read(codec, WM8960_LINVOL);
snd_soc_write(codec, WM8960_LINVOL, reg | 0x100);
reg = snd_soc_read(codec, WM8960_RINVOL);
snd_soc_write(codec, WM8960_RINVOL, reg | 0x100);
reg = snd_soc_read(codec, WM8960_LADC);
snd_soc_write(codec, WM8960_LADC, reg | 0x100);
reg = snd_soc_read(codec, WM8960_RADC);
snd_soc_write(codec, WM8960_RADC, reg | 0x100);
reg = snd_soc_read(codec, WM8960_LDAC);
snd_soc_write(codec, WM8960_LDAC, reg | 0x100);
reg = snd_soc_read(codec, WM8960_RDAC);
snd_soc_write(codec, WM8960_RDAC, reg | 0x100);
reg = snd_soc_read(codec, WM8960_LOUT1);
snd_soc_write(codec, WM8960_LOUT1, reg | 0x100);
reg = snd_soc_read(codec, WM8960_ROUT1);
snd_soc_write(codec, WM8960_ROUT1, reg | 0x100);
reg = snd_soc_read(codec, WM8960_LOUT2);
snd_soc_write(codec, WM8960_LOUT2, reg | 0x100);
reg = snd_soc_read(codec, WM8960_ROUT2);
snd_soc_write(codec, WM8960_ROUT2, reg | 0x100);
wm8960_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(&wm8960_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(wm8960);
return ret;
}
static void wm8960_unregister(struct wm8960_priv *wm8960)
{
wm8960->codec.set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&wm8960_dai);
snd_soc_unregister_codec(&wm8960->codec);
kfree(wm8960);
wm8960_codec = NULL;
}
static __devinit int wm8960_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8960_priv *wm8960;
struct snd_soc_codec *codec;
wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL);
if (wm8960 == NULL)
return -ENOMEM;
codec = &wm8960->codec;
i2c_set_clientdata(i2c, wm8960);
codec->control_data = i2c;
codec->dev = &i2c->dev;
return wm8960_register(wm8960, SND_SOC_I2C);
}
static __devexit int wm8960_i2c_remove(struct i2c_client *client)
{
struct wm8960_priv *wm8960 = i2c_get_clientdata(client);
wm8960_unregister(wm8960);
return 0;
}
static const struct i2c_device_id wm8960_i2c_id[] = {
{ "wm8960", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id);
static struct i2c_driver wm8960_i2c_driver = {
.driver = {
.name = "wm8960",
.owner = THIS_MODULE,
},
.probe = wm8960_i2c_probe,
.remove = __devexit_p(wm8960_i2c_remove),
.id_table = wm8960_i2c_id,
};
static int __init wm8960_modinit(void)
{
int ret;
ret = i2c_add_driver(&wm8960_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n",
ret);
}
return ret;
}
module_init(wm8960_modinit);
static void __exit wm8960_exit(void)
{
i2c_del_driver(&wm8960_i2c_driver);
}
module_exit(wm8960_exit);
MODULE_DESCRIPTION("ASoC WM8960 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");
Reference in a new issue View git blame Copy permalink