[alsa-devel] [PATCH] ASoC ADS117x ADC driver
Liam Girdwood
lrg at slimlogic.co.uk
Wed Nov 4 18:49:22 CET 2009
From: Graeme Gregory <gg at slimlogic.co.uk>
This patch adds support for the TI ADS117x family of multichannel ADCs
and was sponsored by Shotspotter Inc.
Signed-off-by: Graeme Gregory <gg at slimlogic.co.uk>
Signed-off-by: Liam Girdwood <lrg at slimlogic.co.uk>
---
sound/soc/codecs/Kconfig | 5 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/ads117x.c | 129 ++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/ads117x.h | 13 +++++
4 files changed, 149 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/codecs/ads117x.c
create mode 100644 sound/soc/codecs/ads117x.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index b54dfd0..9763062 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -15,6 +15,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_AD1836 if SPI_MASTER
select SND_SOC_AD1938 if SPI_MASTER
select SND_SOC_AD1980 if SND_SOC_AC97_BUS
+ select SND_SOC_ADS117X
select SND_SOC_AD73311 if I2C
select SND_SOC_AK4104 if SPI_MASTER
select SND_SOC_AK4535 if I2C
@@ -97,6 +98,9 @@ config SND_SOC_AD1980
config SND_SOC_AD73311
tristate
+
+config SND_SOC_ADS117X
+ tristate
config SND_SOC_AK4104
tristate
@@ -261,3 +265,4 @@ config SND_SOC_WM9713
# Amp
config SND_SOC_MAX9877
tristate
+
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 15350ec..ad12458 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -5,6 +5,7 @@ snd-soc-ad1939-objs := ad1939.o
snd-soc-ad1980-objs := ad1980.o
snd-soc-ak4535-objs := ak4535.o
snd-soc-ad73311-objs := ad73311.o
+snd-soc-ads117x-objs := ads117x.o
snd-soc-ak4104-objs := ak4104.o
snd-soc-ak4535-objs := ak4535.o
snd-soc-ak4642-objs := ak4642.o
@@ -67,6 +68,7 @@ obj-$(CONFIG_SND_SOC_AD1938) += snd-soc-ad1938.o
obj-$(CONFIG_SND_SOC_AD1939) += snd-soc-ad1939.o
obj-$(CONFIG_SND_SOC_AD1980) += snd-soc-ad1980.o
obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.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_CS4251X) += snd-soc-cs4251x.o
diff --git a/sound/soc/codecs/ads117x.c b/sound/soc/codecs/ads117x.c
new file mode 100644
index 0000000..72be32c
--- /dev/null
+++ b/sound/soc/codecs/ads117x.c
@@ -0,0 +1,129 @@
+/*
+ * ads117x.c -- Driver for ads1174/8 ADC chips
+ *
+ * Copyright 2009 ShotSpotter Inc.
+ * Author: Graeme Gregory <gg at slimlogic.co.uk>
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "ads117x.h"
+
+#define ADS117X_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 )
+
+#define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
+
+struct snd_soc_dai ads117x_dai = {
+/* ADC */
+ .name = "ADS117X ADC",
+ .id = 1,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 32,
+ .rates = ADS117X_RATES,
+ .formats = ADS117X_FORMATS,},
+};
+EXPORT_SYMBOL_GPL(ads117x_dai);
+
+/*
+ * initialise the ads117x driver
+ */
+static int ads117x_init(struct snd_soc_device *socdev)
+{
+ struct snd_soc_codec *codec = socdev->card->codec;
+ int ret = 0;
+
+ codec->name = "ADS117X";
+ codec->owner = THIS_MODULE;
+ codec->dai = &ads117x_dai;
+ codec->num_dai = 1;
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ printk(KERN_ERR "ads117x: failed to create pcms\n");
+ return ret;
+ }
+
+ ret = snd_soc_init_card(socdev);
+ if (ret < 0) {
+ printk(KERN_ERR "ads117x: failed to register card\n");
+ goto card_err;
+ }
+ return ret;
+
+card_err:
+ snd_soc_free_pcms(socdev);
+ return ret;
+}
+
+static int ads117x_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int ret;
+
+ pr_info("ads117x ADC\n");
+
+ codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+ if (codec == NULL)
+ return -ENOMEM;
+
+ socdev->card->codec = codec;
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+
+ ret = ads117x_init(socdev);
+ if (ret != 0)
+ kfree(codec);
+
+ return ret;
+}
+
+static int ads117x_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ snd_soc_free_pcms(socdev);
+ kfree(codec);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_ads117x = {
+ .probe = ads117x_probe,
+ .remove = ads117x_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_ads117x);
+
+static int __init ads117x_modinit(void)
+{
+ return snd_soc_register_dai(&ads117x_dai);
+}
+module_init(ads117x_modinit);
+
+static void __exit ads117x_exit(void)
+{
+ snd_soc_unregister_dai(&ads117x_dai);
+}
+module_exit(ads117x_exit);
+
+MODULE_DESCRIPTION("ASoC ads117x driver");
+MODULE_AUTHOR("Graeme Gregory");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/ads117x.h b/sound/soc/codecs/ads117x.h
new file mode 100644
index 0000000..dbcf50e
--- /dev/null
+++ b/sound/soc/codecs/ads117x.h
@@ -0,0 +1,13 @@
+/*
+ * ads117x.h -- Driver for ads1174/8 ADC chips
+ *
+ * Copyright 2009 ShotSpotter Inc.
+ * Author: Graeme Gregory <gg at slimlogic.co.uk>
+ *
+ * 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.
+ */
+extern struct snd_soc_dai ads117x_dai;
+extern struct snd_soc_codec_device soc_codec_dev_ads117x;
--
1.6.3.3
More information about the Alsa-devel
mailing list