[alsa-devel] [PATCH] ASoC: add ak4554 driver
Kuninori Morimoto
kuninori.morimoto.gx at renesas.com
Mon Jul 1 08:43:51 CEST 2013
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 at 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 at 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 at renesas.com>");
--
1.7.9.5
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