ak4554 is very simple DA/AD converter which has no setting register. But, playback format is SND_SOC_DAIFMT_RIGHT_J, and, capture format is SND_SOC_DAIFMT_LEFT_J on same bit clock, LR clock. Because of that, snd_soc_dai_driver consists from "playback only" and "capture only" here, and it has software base symmetric_rates check.

Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- sound/soc/codecs/Kconfig | 3 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/ak4554.c | 171 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 176 insertions(+) create mode 100644 sound/soc/codecs/ak4554.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 2f45f00..b4ec4ea 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -196,6 +196,9 @@ config SND_SOC_AK4104 config SND_SOC_AK4535 tristate

+config SND_SOC_AK4554 + tristate + config SND_SOC_AK4641 tristate

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index b9e41c9..e601a47 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -11,6 +11,7 @@ snd-soc-adav80x-objs := adav80x.o snd-soc-ads117x-objs := ads117x.o snd-soc-ak4104-objs := ak4104.o snd-soc-ak4535-objs := ak4535.o +snd-soc-ak4554-objs := ak4554.o snd-soc-ak4641-objs := ak4641.o snd-soc-ak4642-objs := ak4642.o snd-soc-ak4671-objs := ak4671.o @@ -136,6 +137,7 @@ obj-$(CONFIG_SND_SOC_ADAV80X) += snd-soc-adav80x.o obj-$(CONFIG_SND_SOC_ADS117X) += snd-soc-ads117x.o obj-$(CONFIG_SND_SOC_AK4104) += snd-soc-ak4104.o obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o +obj-$(CONFIG_SND_SOC_AK4554) += snd-soc-ak4554.o obj-$(CONFIG_SND_SOC_AK4641) += snd-soc-ak4641.o obj-$(CONFIG_SND_SOC_AK4642) += snd-soc-ak4642.o obj-$(CONFIG_SND_SOC_AK4671) += snd-soc-ak4671.o diff --git a/sound/soc/codecs/ak4554.c b/sound/soc/codecs/ak4554.c new file mode 100644 index 0000000..277f216 --- /dev/null +++ b/sound/soc/codecs/ak4554.c @@ -0,0 +1,171 @@ +/* + * ak4554.c + * + * Copyright (C) 2013 Renesas Solutions Corp. + * Kuninori Morimoto kuninori.morimoto.gx@renesas.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <sound/soc.h> + +/* + * ak4554 is very simple DA/AD converter which has no setting register. + * But, playback format is SND_SOC_DAIFMT_RIGHT_J, + * and, capture format is SND_SOC_DAIFMT_LEFT_J + * on same bit clock, LR clock. + * Because of that, snd_soc_dai_driver consists from + * "playback only" and "capture only" here. + */ + +struct ak4554_priv { + int rate; + int usrcnt; +}; + +static int ak4554_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + int dai_is_play = (dai->id == 0); + int fmt_is_play = 0; + + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBM_CFM: + case SND_SOC_DAIFMT_CBS_CFM: + case SND_SOC_DAIFMT_CBM_CFS: + dev_err(dai->dev, "can't be clock master\n"); + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + fmt_is_play = 1; + break; + case SND_SOC_DAIFMT_LEFT_J: + fmt_is_play = 0; + break; + } + + if (dai_is_play != fmt_is_play) { + dev_err(dai->dev, "format error\n"); + return -EINVAL; + } + + return 0; +} + +static int ak4554_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct ak4554_priv *priv = dev_get_drvdata(dai->dev); + + if ((priv->usrcnt > 0) && + (priv->rate != params_rate(params))) { + dev_err(dai->dev, "asymmetric rate\n"); + return -EIO; + } + + priv->usrcnt++; + priv->rate = params_rate(params); + + return 0; +} + +static void ak4554_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct ak4554_priv *priv = dev_get_drvdata(dai->dev); + + priv->usrcnt--; + + if (priv->usrcnt <= 0) + priv->rate = 0; +} + +static const struct snd_soc_dai_ops ak4554_dai_ops = { + .set_fmt = ak4554_dai_set_fmt, + .hw_params = ak4554_dai_hw_params, + .shutdown = ak4554_dai_shutdown, +}; + +struct snd_soc_dai_driver ak4554_dai[] = { + { + .name = "ak4554-hifi-playback", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .ops = &ak4554_dai_ops, + }, { + .name = "ak4554-hifi-capture", + .capture = { + .stream_name = "Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .ops = &ak4554_dai_ops, + } +}; +EXPORT_SYMBOL_GPL(ak4554_dai); + +static int ak4554_probe(struct snd_soc_codec *codec) +{ + dev_info(codec->dev, "probed\n"); + return 0; +} + +static int ak4554_remove(struct snd_soc_codec *codec) +{ + dev_info(codec->dev, "removed\n"); + return 0; +} + +static struct snd_soc_codec_driver soc_codec_dev_ak4554 = { + .probe = ak4554_probe, + .remove = ak4554_remove, +}; + +static int ak4554_soc_probe(struct platform_device *pdev) +{ + struct ak4554_priv *priv; + + priv = devm_kzalloc(&pdev->dev, sizeof(struct ak4554_priv), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(&pdev->dev, priv); + + return snd_soc_register_codec(&pdev->dev, + &soc_codec_dev_ak4554, + ak4554_dai, ARRAY_SIZE(ak4554_dai)); +} + +static int ak4554_soc_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + return 0; +} + +static struct platform_driver ak4554_driver = { + .driver = { + .name = "ak4554-adc-dac", + .owner = THIS_MODULE, + }, + .probe = ak4554_soc_probe, + .remove = ak4554_soc_remove, +}; +module_platform_driver(ak4554_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SoC AK4554 driver"); +MODULE_AUTHOR("Kuninori Morimoto kuninori.morimoto.gx@renesas.com");