// SPDX-License-Identifier: GPL-2.0-only
/*
* 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 >
*
* 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 / regmap . h >
# include < linux / slab . h >
# include < sound / core . h >
# include < sound / pcm . h >
# include < sound / pcm_params . h >
# include < sound / soc . h >
# include < sound / initval . h >
# include < sound / tlv . h >
# include " wm8940 . h "
struct wm8940_priv {
unsigned int mclk ;
unsigned int fs ;
struct regmap * regmap ;
} ;
static bool wm8940_volatile_register ( struct device * dev , unsigned int reg )
{
switch ( reg ) {
case WM8940_SOFTRESET :
return true ;
default :
return false ;
}
}
static bool wm8940_readable_register ( struct device * dev , unsigned int reg )
{
switch ( reg ) {
case WM8940_SOFTRESET :
case WM8940_POWER1 :
case WM8940_POWER2 :
case WM8940_POWER3 :
case WM8940_IFACE :
case WM8940_COMPANDINGCTL :
case WM8940_CLOCK :
case WM8940_ADDCNTRL :
case WM8940_GPIO :
case WM8940_CTLINT :
case WM8940_DAC :
case WM8940_DACVOL :
case WM8940_ADC :
case WM8940_ADCVOL :
case WM8940_NOTCH1 :
case WM8940_NOTCH2 :
case WM8940_NOTCH3 :
case WM8940_NOTCH4 :
case WM8940_NOTCH5 :
case WM8940_NOTCH6 :
case WM8940_NOTCH7 :
case WM8940_NOTCH8 :
case WM8940_DACLIM1 :
case WM8940_DACLIM2 :
case WM8940_ALC1 :
case WM8940_ALC2 :
case WM8940_ALC3 :
case WM8940_NOISEGATE :
case WM8940_PLLN :
case WM8940_PLLK1 :
case WM8940_PLLK2 :
case WM8940_PLLK3 :
case WM8940_ALC4 :
case WM8940_INPUTCTL :
case WM8940_PGAGAIN :
case WM8940_ADCBOOST :
case WM8940_OUTPUTCTL :
case WM8940_SPKMIX :
case WM8940_SPKVOL :
case WM8940_MONOMIX :
return true ;
default :
return false ;
}
}
static const struct reg_default wm8940_reg_defaults [ ] = {
{ 0 x1 , 0 x0000 } , { 0x1, 0x0000 }, /* Power 1 */
{ 0 x2, 0 x0000 }, /* Power 2 */
{ 0 x3, 0 x0000 }, /* Power 3 */
{ 0 x4, 0 x0010 }, /* Interface Control */
{ 0 x5, 0 x0000 }, /* Companding Control */
{ 0 x6, 0 x0140 }, /* Clock Control */
{ 0 x7, 0 x0000 }, /* Additional Controls */
{ 0 x8, 0 x0000 }, /* GPIO Control */
{ 0 x9, 0 x0002 }, /* Auto Increment Control */
{ 0 xa, 0 x0000 }, /* DAC Control */
{ 0 xb, 0 x00FF }, /* DAC Volume */
{ 0 xe, 0 x0100 }, /* ADC Control */
{ 0 xf, 0 x00FF }, /* ADC Volume */
{ 0 x10, 0 x0000 }, /* Notch Filter 1 Control 1 */
{ 0 x11, 0 x0000 }, /* Notch Filter 1 Control 2 */
{ 0 x12, 0 x0000 }, /* Notch Filter 2 Control 1 */
{ 0 x13, 0 x0000 }, /* Notch Filter 2 Control 2 */
{ 0 x14, 0 x0000 }, /* Notch Filter 3 Control 1 */
{ 0 x15, 0 x0000 }, /* Notch Filter 3 Control 2 */
{ 0 x16, 0 x0000 }, /* Notch Filter 4 Control 1 */
{ 0 x17, 0 x0000 }, /* Notch Filter 4 Control 2 */
{ 0 x18, 0 x0032 }, /* DAC Limit Control 1 */
{ 0 x19, 0 x0000 }, /* DAC Limit Control 2 */
{ 0 x20, 0 x0038 }, /* ALC Control 1 */
{ 0 x21, 0 x000B }, /* ALC Control 2 */
{ 0 x22, 0 x0032 }, /* ALC Control 3 */
{ 0 x23, 0 x0000 }, /* Noise Gate */
{ 0 x24, 0 x0041 }, /* PLLN */
{ 0 x25, 0 x000C }, /* PLLK1 */
{ 0 x26, 0 x0093 }, /* PLLK2 */
{ 0 x27, 0 x00E9 }, /* PLLK3 */
{ 0 x2a, 0 x0030 }, /* ALC Control 4 */
{ 0 x2c, 0 x0002 }, /* Input Control */
{ 0 x2d, 0 x0050 }, /* PGA Gain */
{ 0 x2f, 0 x0002 }, /* ADC Boost Control */
{ 0 x31, 0 x0002 }, /* Output Control */
{ 0 x32, 0 x0000 }, /* Speaker Mixer Control */
{ 0 x36, 0 x0079 }, /* Speaker Volume */
{ 0 x38, 0 x0000 }, /* Mono Mixer Control */
};
static const char *wm8940_companding[] = { "Off" , "NC" , "u-law" , "A-law" };
static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
WM8940_COMPANDINGCTL, 1 , wm8940_companding);
static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
WM8940_COMPANDINGCTL, 3 , wm8940_companding);
static const char *wm8940_alc_mode_text[] = {"ALC" , "Limiter" };
static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
WM8940_ALC3, 8 , wm8940_alc_mode_text);
static const char *wm8940_mic_bias_level_text[] = {"0.9" , "0.65" };
static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
WM8940_INPUTCTL, 8 , wm8940_mic_bias_level_text);
static const char *wm8940_filter_mode_text[] = {"Audio" , "Application" };
static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
WM8940_ADC, 7 , wm8940_filter_mode_text);
static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700 , 100 , 1 );
static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000 , 1000 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200 , 75 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200 , 600 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675 , 600 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250 , 50 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0 , 100 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600 , 100 , 0 );
static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750 , 50 , 1 );
static 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 Volume" , 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 ),
};
static 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 wm8940_dapm_routes[] = {
/* 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" },
};
#define wm8940_reset(c) snd_soc_component_write(c, WM8940_SOFTRESET, 0 );
static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0 xFE67;
u16 clk = snd_soc_component_read(component, WM8940_CLOCK) & 0 x1fe;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
clk |= 1 ;
break ;
case SND_SOC_DAIFMT_CBC_CFC:
break ;
default :
return -EINVAL;
}
snd_soc_component_write(component, 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 ;
}
snd_soc_component_write(component, WM8940_IFACE, iface);
return 0 ;
}
static int wm8940_update_clocks(struct snd_soc_dai *dai);
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_component *component = dai->component;
struct wm8940_priv *priv = snd_soc_component_get_drvdata(component);
u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0 xFD9F;
u16 addcntrl = snd_soc_component_read(component, WM8940_ADDCNTRL) & 0 xFFF1;
u16 companding = snd_soc_component_read(component,
WM8940_COMPANDINGCTL) & 0 xFFDF;
int ret;
priv->fs = params_rate(params);
ret = wm8940_update_clocks(dai);
if (ret)
return ret;
/* LoutR control */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& params_channels(params) == 2 )
iface |= (1 << 9 );
switch (params_rate(params)) {
case 8000 :
addcntrl |= (0 x5 << 1 );
break ;
case 11025 :
addcntrl |= (0 x4 << 1 );
break ;
case 16000 :
addcntrl |= (0 x3 << 1 );
break ;
case 22050 :
addcntrl |= (0 x2 << 1 );
break ;
case 32000 :
addcntrl |= (0 x1 << 1 );
break ;
case 44100 :
case 48000 :
break ;
}
ret = snd_soc_component_write(component, WM8940_ADDCNTRL, addcntrl);
if (ret)
goto error_ret;
switch (params_width(params)) {
case 8 :
companding = companding | (1 << 5 );
break ;
case 16 :
break ;
case 20 :
iface |= (1 << 5 );
break ;
case 24 :
iface |= (2 << 5 );
break ;
case 32 :
iface |= (3 << 5 );
break ;
}
ret = snd_soc_component_write(component, WM8940_COMPANDINGCTL, companding);
if (ret)
goto error_ret;
ret = snd_soc_component_write(component, WM8940_IFACE, iface);
error_ret:
return ret;
}
static int wm8940_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
u16 mute_reg = snd_soc_component_read(component, WM8940_DAC) & 0 xffbf;
if (mute)
mute_reg |= 0 x40;
return snd_soc_component_write(component, WM8940_DAC, mute_reg);
}
static int wm8940_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component);
u16 val;
u16 pwr_reg = snd_soc_component_read(component, WM8940_POWER1) & 0 x1F0;
int ret = 0 ;
switch (level) {
case SND_SOC_BIAS_ON:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2 ) | (1 << 3 );
/* Enable thermal shutdown */
val = snd_soc_component_read(component, WM8940_OUTPUTCTL);
ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, val | 0 x2);
if (ret)
break ;
/* set vmid to 75k */
ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0 x1);
break ;
case SND_SOC_BIAS_PREPARE:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2 ) | (1 << 3 );
ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0 x1);
break ;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
ret = regcache_sync(wm8940->regmap);
if (ret < 0 ) {
dev_err(component->dev, "Failed to sync cache: %d\n" , ret);
return ret;
}
}
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2 ) | (1 << 3 );
/* set vmid to 300k for standby */
ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0 x2);
break ;
case SND_SOC_BIAS_OFF:
ret = snd_soc_component_write(component, 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 */
!insertion
u java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 65
java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 25
{
java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 27
/* The left shift ist to avoid accuracy loss when right shifting */ java.lang.StringIndexOutOfBoundsException: Range [60, 58) out of bounds for length 65
java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 24
if (Ndiv > 12 ) {
java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 34
* java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 21
java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 58
} Ndiv<3 ){
s>> 2 ;
/* Divide by 4 */
pll_div.pre_scale = 3 ;
Ndiv = target / java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 1
} java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
sjava.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 15
java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 50
pll_divjava.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 50
div= /sourcejava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
wmbhc ,;
pre_scale ;
if ((Ndiv < 6 ) || (Ndiv > 12 ))
printk(KERN_WARNING
"WM8940 N value %d outwith recommended range!d\n" ,
Ndiv);
pll_div.n = java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
Nmod >java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 38
=*(long Nmod;
do_div(Kpart, source);
K = Kpart&0 java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
/* Check if we need to round */
K += 5 ;
/
K /= 10 ;
k ;
}
/* Untested at the moment */ java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 56
*,pll_id
int MICB_ENABLE;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
=>java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
u16 reg;
/* Turn off PLL */
java.lang.StringIndexOutOfBoundsException: Range [55, 54) out of bounds for length 56
java.lang.StringIndexOutOfBoundsException: Range [34, 24) out of bounds for length 64
if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* Clock CODEC directly from MCLK */
java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 56
if (mbhc->mbhc_cb-java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 43
java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 60
}
/* Pll is followed by a frequency divide by 4 */
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 34
)
java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 49
(pll_div mbhc>=
mbhc i = false java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
( java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 30
snd_soc_component_write ( component , WM8940_PLLK1 , pll_div . k > > 18 ) ;
snd_soc_component_write ( component , WM8940_PLLK2 , ( pll_div . k > > 9 ) & 0 x1ff ) ;
snd_soc_component_write ( component , WM8940_PLLK3 , pll_div . k & 0 x1ff ) ;
/* Enable the PLL */
reg = snd_soc_component_read(component, WM8940_POWER1);
snd_soc_component_write(component, WM8940_POWER1, reg | 0 x020);
/* Run CODEC from PLL instead of MCLK */
reg = snd_soc_component_read(component, WM8940_CLOCK);
snd_soc_component_write(component, WM8940_CLOCK, reg | 0 x100);
return 0 ;
}
static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
int div_id, int div)
{
struct snd_soc_component *component = codec_dai->component;
u16 reg;
int ret = 0 ;
switch (div_id) {
case WM8940_BCLKDIV:
reg = snd_soc_component_read(component, WM8940_CLOCK) & 0 xFFE3;
ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 2 ));
break ;
case WM8940_MCLKDIV:
reg = snd_soc_component_read(component, WM8940_CLOCK) & 0 xFF1F;
ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 5 ));
break ;
case WM8940_OPCLKDIV:
reg = snd_soc_component_read(component, WM8940_GPIO) & 0 xFFCF;
ret = snd_soc_component_write(component, WM8940_GPIO, reg | (div << 4 ));
break ;
}
return ret;
}
static unsigned int wm8940_get_mclkdiv(unsigned int f_in, unsigned int f_out,
int *mclkdiv)
{
unsigned int ratio = 2 * f_in / f_out;
if (ratio <= 2 ) {
*mclkdiv = WM8940_MCLKDIV_1;
ratio = 2 ;
} else if (ratio == 3 ) {
*mclkdiv = WM8940_MCLKDIV_1_5;
} else if (ratio == 4 ) {
*mclkdiv = WM8940_MCLKDIV_2;
} else if (ratio <= 6 ) {
*mclkdiv = WM8940_MCLKDIV_3;
ratio = 6 ;
} else if (ratio <= 8 ) {
*mclkdiv = WM8940_MCLKDIV_4;
ratio = 8 ;
} else if (ratio <= 12 ) {
*mclkdiv = WM8940_MCLKDIV_6;
ratio = 12 ;
} else if (ratio <= 16 ) {
*mclkdiv = WM8940_MCLKDIV_8;
ratio = 16 ;
} else {
*mclkdiv = WM8940_MCLKDIV_12;
ratio = 24 ;
}
return f_out * ratio / 2 ;
}
static int wm8940_update_clocks(struct snd_soc_dai *dai)
{
struct snd_soc_component *codec = dai->component;
struct wm8940_priv *priv = snd_soc_component_get_drvdata(codec);
unsigned int fs256;
unsigned int fpll = 0 ;
unsigned int f;
int mclkdiv;
if (!priv->mclk || !priv->fs)
return 0 ;
fs256 = 256 * priv->fs;
f = wm8940_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
if (f != priv->mclk) {
/* The PLL performs best around 90MHz */
if (fs256 % 8000 )
f = 22579200 ;
else
f = 24576000 ;
fpll = wm8940_get_mclkdiv(f, fs256, &mclkdiv);
}
wm8940_set_dai_pll(dai, 0 , 0 , priv->mclk, fpll);
wm8940_set_dai_clkdiv(dai, WM8940_MCLKDIV, mclkdiv);
return 0 ;
}
static int wm8940_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct snd_soc_component *codec = dai->component;
struct wm8940_priv *priv = snd_soc_component_get_drvdata(codec);
if (dir != SND_SOC_CLOCK_IN)
return -EINVAL;
priv->mclk = freq;
return wm8940_update_clocks(dai);
}
#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 const struct snd_soc_dai_ops wm8940_dai_ops = {
.hw_params = wm8940_i2s_hw_params,
.set_sysclk = wm8940_set_dai_sysclk,
.mute_stream = wm8940_mute,
.set_fmt = wm8940_set_dai_fmt,
.set_clkdiv = wm8940_set_dai_clkdiv,
.set_pll = wm8940_set_dai_pll,
.no_capture_mute = 1 ,
};
static struct snd_soc_dai_driver wm8940_dai = {
.name = "wm8940-hifi" ,
.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_rate = 1 ,
};
static int wm8940_probe(struct snd_soc_component *component)
{
struct wm8940_setup_data *pdata = component->dev->platform_data;
int ret;
u16 reg;
/*
* Check chip ID for wm8940 - value of 0 x00 offset
* SOFTWARE_RESET on write
* CHIP_ID on read
*/
reg = snd_soc_component_read(component, WM8940_SOFTRESET);
if (reg != WM8940_CHIP_ID) {
dev_err(component->dev, "Wrong wm8940 chip ID: 0x%x\n" , reg);
return -ENODEV;
}
ret = wm8940_reset(component);
if (ret < 0 ) {
dev_err(component->dev, "Failed to issue reset\n" );
return ret;
}
snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
ret = snd_soc_component_write(component, WM8940_POWER1, 0 x180);
if (ret < 0 )
return ret;
if (pdata) {
reg = snd_soc_component_read(component, WM8940_OUTPUTCTL);
ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, reg | pdata->vroi);
if (ret < 0 )
return ret;
}
return ret;
}
static const struct snd_soc_component_driver soc_component_dev_wm8940 = {
.probe = wm8940_probe,
.set_bias_level = wm8940_set_bias_level,
.controls = wm8940_snd_controls,
.num_controls = ARRAY_SIZE(wm8940_snd_controls),
.dapm_widgets = wm8940_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
.dapm_routes = wm8940_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
.suspend_bias_off = 1 ,
.idle_bias_on = 1 ,
.use_pmdown_time = 1 ,
.endianness = 1 ,
};
static const struct regmap_config wm8940_regmap = {
.reg_bits = 8 ,
.val_bits = 16 ,
.max_register = WM8940_MONOMIX,
.reg_defaults = wm8940_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
.cache_type = REGCACHE_MAPLE,
.readable_reg = wm8940_readable_register,
.volatile_reg = wm8940_volatile_register,
};
static int wm8940_i2c_probe(struct i2c_client *i2c)
{
struct wm8940_priv *wm8940;
int ret;
wm8940 = devm_kzalloc(&i2c->dev, sizeof (struct wm8940_priv),
GFP_KERNEL);
if (wm8940 == NULL)
return -ENOMEM;
wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
if (IS_ERR(wm8940->regmap))
return PTR_ERR(wm8940->regmap);
i2c_set_clientdata(i2c, wm8940);
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_component_dev_wm8940, &wm8940_dai, 1 );
return ret;
}
static const struct i2c_device_id wm8940_i2c_id[] = {
{ "wm8940" },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
static const struct of_device_id wm8940_of_match[] = {
{ .compatible = "wlf,wm8940" , },
{ }
};
MODULE_DEVICE_TABLE(of, wm8940_of_match);
static struct i2c_driver wm8940_i2c_driver = {
.driver = {
.name = "wm8940" ,
.of_match_table = wm8940_of_match,
},
.probe = wm8940_i2c_probe,
.id_table = wm8940_i2c_id,
};
module_i2c_driver(wm8940_i2c_driver);
MODULE_DESCRIPTION("ASoC WM8940 driver" );
MODULE_AUTHOR("Jonathan Cameron" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=92 H=97 G=94
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(vorverarbeitet am 2026-10-14)
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