X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=sound%2Fsoc%2Fcodecs%2Fsgtl5000.c;h=29cf7ce610f4707feeaba22425daedbe50491ba4;hb=45cbdda46b3c7f225e9c7e48aa72f0479f832ea2;hp=dab9b15304af829a510742ec4a4827bdca90a453;hpb=e818d5ed2aa270da3a63b30a2320f49ed02026cf;p=karo-tx-linux.git diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c index dab9b15304af..29cf7ce610f4 100644 --- a/sound/soc/codecs/sgtl5000.c +++ b/sound/soc/codecs/sgtl5000.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -121,6 +122,13 @@ struct ldo_regulator { bool enabled; }; +enum sgtl5000_micbias_resistor { + SGTL5000_MICBIAS_OFF = 0, + SGTL5000_MICBIAS_2K = 2, + SGTL5000_MICBIAS_4K = 4, + SGTL5000_MICBIAS_8K = 8, +}; + /* sgtl5000 private structure in codec */ struct sgtl5000_priv { int sysclk; /* sysclk rate */ @@ -131,6 +139,8 @@ struct sgtl5000_priv { struct regmap *regmap; struct clk *mclk; int revision; + u8 micbias_resistor; + u8 micbias_voltage; }; /* @@ -145,12 +155,14 @@ struct sgtl5000_priv { static int mic_bias_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { + struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(w->codec); + switch (event) { case SND_SOC_DAPM_POST_PMU: - /* change mic bias resistor to 4Kohm */ + /* change mic bias resistor */ snd_soc_update_bits(w->codec, SGTL5000_CHIP_MIC_CTRL, - SGTL5000_BIAS_R_MASK, - SGTL5000_BIAS_R_4k << SGTL5000_BIAS_R_SHIFT); + SGTL5000_BIAS_R_MASK, + sgtl5000->micbias_resistor << SGTL5000_BIAS_R_SHIFT); break; case SND_SOC_DAPM_PRE_PMD: @@ -530,16 +542,16 @@ static int sgtl5000_set_dai_sysclk(struct snd_soc_dai *codec_dai, /* * set clock according to i2s frame clock, - * sgtl5000 provide 2 clock sources. - * 1. sys_mclk. sample freq can only configure to + * sgtl5000 provides 2 clock sources: + * 1. sys_mclk: sample freq can only be configured to * 1/256, 1/384, 1/512 of sys_mclk. - * 2. pll. can derive any audio clocks. + * 2. pll: can derive any audio clocks. * * clock setting rules: - * 1. in slave mode, only sys_mclk can use. - * 2. as constraint by sys_mclk, sample freq should - * set to 32k, 44.1k and above. - * 3. using sys_mclk prefer to pll to save power. + * 1. in slave mode, only sys_mclk can be used + * 2. as constraint by sys_mclk, sample freq should be set to 32 kHz, 44.1 kHz + * and above. + * 3. usage of sys_mclk is preferred over pll to save power. */ static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) { @@ -549,8 +561,8 @@ static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) /* * sample freq should be divided by frame clock, - * if frame clock lower than 44.1khz, sample feq should set to - * 32khz or 44.1khz. + * if frame clock is lower than 44.1 kHz, sample freq should be set to + * 32 kHz or 44.1 kHz. */ switch (frame_rate) { case 8000: @@ -603,9 +615,10 @@ static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) /* * calculate the divider of mclk/sample_freq, - * factor of freq =96k can only be 256, since mclk in range (12m,27m) + * factor of freq = 96 kHz can only be 256, since mclk is in the range + * of 8 MHz - 27 MHz */ - switch (sgtl5000->sysclk / sys_fs) { + switch (sgtl5000->sysclk / frame_rate) { case 256: clk_ctl |= SGTL5000_MCLK_FREQ_256FS << SGTL5000_MCLK_FREQ_SHIFT; @@ -619,7 +632,7 @@ static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) SGTL5000_MCLK_FREQ_SHIFT; break; default: - /* if mclk not satisify the divider, use pll */ + /* if mclk does not satisfy the divider, use pll */ if (sgtl5000->master) { clk_ctl |= SGTL5000_MCLK_FREQ_PLL << SGTL5000_MCLK_FREQ_SHIFT; @@ -628,7 +641,7 @@ static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) "PLL not supported in slave mode\n"); dev_err(codec->dev, "%d ratio is not supported. " "SYS_MCLK needs to be 256, 384 or 512 * fs\n", - sgtl5000->sysclk / sys_fs); + sgtl5000->sysclk / frame_rate); return -EINVAL; } } @@ -795,7 +808,7 @@ static int ldo_regulator_enable(struct regulator_dev *dev) SGTL5000_LINEREG_D_POWERUP, SGTL5000_LINEREG_D_POWERUP); - /* when internal ldo enabled, simple digital power can be disabled */ + /* when internal ldo is enabled, simple digital power can be disabled */ snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, SGTL5000_LINREG_SIMPLE_POWERUP, 0); @@ -1079,7 +1092,7 @@ static bool sgtl5000_readable(struct device *dev, unsigned int reg) /* * sgtl5000 has 3 internal power supplies: * 1. VAG, normally set to vdda/2 - * 2. chargepump, set to different value + * 2. charge pump, set to different value * according to voltage of vdda and vddio * 3. line out VAG, normally set to vddio/2 * @@ -1325,8 +1338,13 @@ static int sgtl5000_probe(struct snd_soc_codec *codec) SGTL5000_HP_ZCD_EN | SGTL5000_ADC_ZCD_EN); - snd_soc_write(codec, SGTL5000_CHIP_MIC_CTRL, 2); + snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, + SGTL5000_BIAS_R_MASK, + sgtl5000->micbias_resistor << SGTL5000_BIAS_R_SHIFT); + snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, + SGTL5000_BIAS_R_MASK, + sgtl5000->micbias_voltage << SGTL5000_BIAS_R_SHIFT); /* * disable DAP * TODO: @@ -1416,10 +1434,10 @@ static int sgtl5000_i2c_probe(struct i2c_client *client, { struct sgtl5000_priv *sgtl5000; int ret, reg, rev; - unsigned int mclk; + struct device_node *np = client->dev.of_node; + u32 value; - sgtl5000 = devm_kzalloc(&client->dev, sizeof(struct sgtl5000_priv), - GFP_KERNEL); + sgtl5000 = devm_kzalloc(&client->dev, sizeof(*sgtl5000), GFP_KERNEL); if (!sgtl5000) return -ENOMEM; @@ -1440,14 +1458,6 @@ static int sgtl5000_i2c_probe(struct i2c_client *client, return ret; } - /* SGTL5000 SYS_MCLK should be between 8 and 27 MHz */ - mclk = clk_get_rate(sgtl5000->mclk); - if (mclk < 8000000 || mclk > 27000000) { - dev_err(&client->dev, "Invalid SYS_CLK frequency: %u.%03uMHz\n", - mclk / 1000000, mclk / 1000 % 1000); - return -EINVAL; - } - ret = clk_prepare_enable(sgtl5000->mclk); if (ret) return ret; @@ -1469,6 +1479,47 @@ static int sgtl5000_i2c_probe(struct i2c_client *client, dev_info(&client->dev, "sgtl5000 revision 0x%x\n", rev); sgtl5000->revision = rev; + if (np) { + if (!of_property_read_u32(np, + "micbias-resistor-k-ohms", &value)) { + switch (value) { + case SGTL5000_MICBIAS_OFF: + sgtl5000->micbias_resistor = 0; + break; + case SGTL5000_MICBIAS_2K: + sgtl5000->micbias_resistor = 1; + break; + case SGTL5000_MICBIAS_4K: + sgtl5000->micbias_resistor = 2; + break; + case SGTL5000_MICBIAS_8K: + sgtl5000->micbias_resistor = 3; + break; + default: + sgtl5000->micbias_resistor = 2; + dev_err(&client->dev, + "Unsuitable MicBias resistor\n"); + } + } else { + /* default is 4Kohms */ + sgtl5000->micbias_resistor = 2; + } + if (!of_property_read_u32(np, + "micbias-voltage-m-volts", &value)) { + /* 1250mV => 0 */ + /* steps of 250mV */ + if ((value >= 1250) && (value <= 3000)) + sgtl5000->micbias_voltage = (value / 250) - 5; + else { + sgtl5000->micbias_voltage = 0; + dev_err(&client->dev, + "Unsuitable MicBias resistor\n"); + } + } else { + sgtl5000->micbias_voltage = 0; + } + } + i2c_set_clientdata(client, sgtl5000); /* Ensure sgtl5000 will start with sane register values */