From a405387c6825b1fc1956e22b10160b0f31536f3f Mon Sep 17 00:00:00 2001 From: Javier Martin Date: Wed, 31 Oct 2012 11:53:33 +0100 Subject: [PATCH 1/2] ASoC: tlv320aic32x4: Fix problem with first capture. In its previous status, the first capture didn't work properly; nothing was actually recorded from the microphone. This behaviour was observed using a Visstrim M10 board. In order to solve this BUG a workaround has been added that, during the initialization process of the codec, powers on and off the ADC. The issue seems related to a HW BUG or some behavior that is not documented in the datasheet. Signed-off-by: Javier Martin Signed-off-by: Mark Brown --- sound/soc/codecs/tlv320aic32x4.c | 10 ++++++++++ sound/soc/codecs/tlv320aic32x4.h | 3 +++ 2 files changed, 13 insertions(+) diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c index f230292ba96b..d7d0e18f794c 100644 --- a/sound/soc/codecs/tlv320aic32x4.c +++ b/sound/soc/codecs/tlv320aic32x4.c @@ -675,6 +675,16 @@ static int aic32x4_probe(struct snd_soc_codec *codec) ARRAY_SIZE(aic32x4_snd_controls)); aic32x4_add_widgets(codec); + /* + * Workaround: for an unknown reason, the ADC needs to be powered up + * and down for the first capture to work properly. It seems related to + * a HW BUG or some kind of behavior not documented in the datasheet. + */ + tmp_reg = snd_soc_read(codec, AIC32X4_ADCSETUP); + snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg | + AIC32X4_LADC_EN | AIC32X4_RADC_EN); + snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg); + return 0; } diff --git a/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h index aae2b2440398..35774223fd91 100644 --- a/sound/soc/codecs/tlv320aic32x4.h +++ b/sound/soc/codecs/tlv320aic32x4.h @@ -94,6 +94,9 @@ #define AIC32X4_WORD_LEN_24BITS 0x02 #define AIC32X4_WORD_LEN_32BITS 0x03 +#define AIC32X4_LADC_EN (1 << 7) +#define AIC32X4_RADC_EN (1 << 6) + #define AIC32X4_I2S_MODE 0x00 #define AIC32X4_DSP_MODE 0x01 #define AIC32X4_RIGHT_JUSTIFIED_MODE 0x02 From 1858fe97c87c33c4975e291ecbbd6c1a20315674 Mon Sep 17 00:00:00 2001 From: Javier Martin Date: Wed, 31 Oct 2012 11:53:34 +0100 Subject: [PATCH 2/2] ASoC: tlv320aic32x4: Add rstn gpio to platform data. Add the possibility to specify a gpio through platform data so that a HW reset can be issued to the codec. Signed-off-by: Javier Martin Signed-off-by: Mark Brown --- include/sound/tlv320aic32x4.h | 1 + sound/soc/codecs/tlv320aic32x4.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/include/sound/tlv320aic32x4.h b/include/sound/tlv320aic32x4.h index c009f70b4029..24e5d991f148 100644 --- a/include/sound/tlv320aic32x4.h +++ b/include/sound/tlv320aic32x4.h @@ -26,6 +26,7 @@ struct aic32x4_pdata { u32 power_cfg; u32 micpga_routing; bool swapdacs; + int rstn_gpio; }; #endif diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c index d7d0e18f794c..e39e08d5d8e4 100644 --- a/sound/soc/codecs/tlv320aic32x4.c +++ b/sound/soc/codecs/tlv320aic32x4.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -65,6 +66,7 @@ struct aic32x4_priv { u32 power_cfg; u32 micpga_routing; bool swapdacs; + int rstn_gpio; }; /* 0dB min, 1dB steps */ @@ -627,10 +629,20 @@ static int aic32x4_probe(struct snd_soc_codec *codec) { struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec); u32 tmp_reg; + int ret; codec->hw_write = (hw_write_t) i2c_master_send; codec->control_data = aic32x4->control_data; + if (aic32x4->rstn_gpio >= 0) { + ret = devm_gpio_request_one(codec->dev, aic32x4->rstn_gpio, + GPIOF_OUT_INIT_LOW, "tlv320aic32x4 rstn"); + if (ret != 0) + return ret; + ndelay(10); + gpio_set_value(aic32x4->rstn_gpio, 1); + } + snd_soc_write(codec, AIC32X4_RESET, 0x01); /* Power platform configuration */ @@ -723,10 +735,12 @@ static __devinit int aic32x4_i2c_probe(struct i2c_client *i2c, aic32x4->power_cfg = pdata->power_cfg; aic32x4->swapdacs = pdata->swapdacs; aic32x4->micpga_routing = pdata->micpga_routing; + aic32x4->rstn_gpio = pdata->rstn_gpio; } else { aic32x4->power_cfg = 0; aic32x4->swapdacs = false; aic32x4->micpga_routing = 0; + aic32x4->rstn_gpio = -1; } ret = snd_soc_register_codec(&i2c->dev,