From f75a8ff67d161b5166a2c2360bb2ffaefd5eb853 Mon Sep 17 00:00:00 2001 From: Janusz Krzysztofik Date: Fri, 30 Dec 2011 04:04:54 +0100 Subject: ASoC: cx20442: add bias control over a platform provided regulator Now that a regulator device for controlling the codec chip reset state over a platform agnostic regulator API is available on the only board using this driver so far, extend the driver with a bias control function which will request virtual power to the codec chip from that virtual regulator, and will supersede the present implementation existing at the sound card level. Thanks to the regulator sharing mechanism, both the old (the sound card) and the new (the codec) implementations should coexist smoothly until the sound card file is updated. For this to work as expected, update the sound card .set_bias_level callback to not touch codec->dapm.bias_level. While extending the cx20442 structure, drop unused control_type member. Created against linxu-3.2-rc6, tested on top of patch 1/4 "ARM: OMAP1: ams-delta: set up a regulator over the modem reset GPIO pin". Signed-off-by: Janusz Krzysztofik Acked-by: Mark Brown Signed-off-by: Liam Girdwood --- sound/soc/codecs/cx20442.c | 48 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 46 insertions(+), 2 deletions(-) (limited to 'sound/soc/codecs') diff --git a/sound/soc/codecs/cx20442.c b/sound/soc/codecs/cx20442.c index ae55e31bfc72..d5fd00a64748 100644 --- a/sound/soc/codecs/cx20442.c +++ b/sound/soc/codecs/cx20442.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -25,8 +26,8 @@ struct cx20442_priv { - enum snd_soc_control_type control_type; void *control_data; + struct regulator *por; }; #define CX20442_PM 0x0 @@ -324,6 +325,38 @@ static struct snd_soc_dai_driver cx20442_dai = { }, }; +static int cx20442_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + struct cx20442_priv *cx20442 = snd_soc_codec_get_drvdata(codec); + int err = 0; + + switch (level) { + case SND_SOC_BIAS_PREPARE: + if (codec->dapm.bias_level != SND_SOC_BIAS_STANDBY) + break; + if (IS_ERR(cx20442->por)) + err = PTR_ERR(cx20442->por); + else + err = regulator_enable(cx20442->por); + break; + case SND_SOC_BIAS_STANDBY: + if (codec->dapm.bias_level != SND_SOC_BIAS_PREPARE) + break; + if (IS_ERR(cx20442->por)) + err = PTR_ERR(cx20442->por); + else + err = regulator_disable(cx20442->por); + break; + default: + break; + } + if (!err) + codec->dapm.bias_level = level; + + return err; +} + static int cx20442_codec_probe(struct snd_soc_codec *codec) { struct cx20442_priv *cx20442; @@ -331,9 +364,13 @@ static int cx20442_codec_probe(struct snd_soc_codec *codec) cx20442 = kzalloc(sizeof(struct cx20442_priv), GFP_KERNEL); if (cx20442 == NULL) return -ENOMEM; - snd_soc_codec_set_drvdata(codec, cx20442); + cx20442->por = regulator_get(codec->dev, "POR"); + if (IS_ERR(cx20442->por)) + dev_warn(codec->dev, "failed to get the regulator"); cx20442->control_data = NULL; + + snd_soc_codec_set_drvdata(codec, cx20442); codec->hw_write = NULL; codec->card->pop_time = 0; @@ -350,6 +387,12 @@ static int cx20442_codec_remove(struct snd_soc_codec *codec) tty_hangup(tty); } + if (!IS_ERR(cx20442->por)) { + /* should be already in STANDBY, hence disabled */ + regulator_put(cx20442->por); + } + + snd_soc_codec_set_drvdata(codec, NULL); kfree(cx20442); return 0; } @@ -359,6 +402,7 @@ static const u8 cx20442_reg; static struct snd_soc_codec_driver cx20442_codec_dev = { .probe = cx20442_codec_probe, .remove = cx20442_codec_remove, + .set_bias_level = cx20442_set_bias_level, .reg_cache_default = &cx20442_reg, .reg_cache_size = 1, .reg_word_size = sizeof(u8), -- cgit v1.2.1 From e48b46ba169181dc88ea48e31dcb4afcf8778397 Mon Sep 17 00:00:00 2001 From: Liam Girdwood Date: Wed, 11 Jan 2012 12:43:24 +0000 Subject: ASoC: twl6040 - Add method to query optimum PDM_DL1 gain The DL1 PDM interface adds a little gain depending on the output device. Add a method to retrieve the gain value for machine driver usage. Signed-off-by: Liam Girdwood --- sound/soc/codecs/twl6040.c | 23 +++++++++++++++++++++++ sound/soc/codecs/twl6040.h | 1 + 2 files changed, 24 insertions(+) (limited to 'sound/soc/codecs') diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c index 3376e6fad2a2..5b9c79b6f65e 100644 --- a/sound/soc/codecs/twl6040.c +++ b/sound/soc/codecs/twl6040.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -1012,6 +1013,28 @@ static int twl6040_pll_put_enum(struct snd_kcontrol *kcontrol, return 0; } +int twl6040_get_dl1_gain(struct snd_soc_codec *codec) +{ + struct snd_soc_dapm_context *dapm = &codec->dapm; + + if (snd_soc_dapm_get_pin_status(dapm, "EP")) + return -1; /* -1dB */ + + if (snd_soc_dapm_get_pin_status(dapm, "HSOR") || + snd_soc_dapm_get_pin_status(dapm, "HSOL")) { + + u8 val = snd_soc_read(codec, TWL6040_REG_HSLCTL); + if (val & TWL6040_HSDACMODE) + /* HSDACL in LP mode */ + return -8; /* -8dB */ + else + /* HSDACL in HP mode */ + return -1; /* -1dB */ + } + return 0; /* 0dB */ +} +EXPORT_SYMBOL_GPL(twl6040_get_dl1_gain); + int twl6040_get_clk_id(struct snd_soc_codec *codec) { struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec); diff --git a/sound/soc/codecs/twl6040.h b/sound/soc/codecs/twl6040.h index a83277bdb851..ef273f1fac2f 100644 --- a/sound/soc/codecs/twl6040.h +++ b/sound/soc/codecs/twl6040.h @@ -34,6 +34,7 @@ enum twl6040_trim { #define TWL6040_HSF_TRIM_LEFT(x) (x & 0x0f) #define TWL6040_HSF_TRIM_RIGHT(x) ((x >> 4) & 0x0f) +int twl6040_get_dl1_gain(struct snd_soc_codec *codec); void twl6040_hs_jack_detect(struct snd_soc_codec *codec, struct snd_soc_jack *jack, int report); int twl6040_get_clk_id(struct snd_soc_codec *codec); -- cgit v1.2.1