ASoC: samsung: Add sound card driver for Snow board

Added machine driver to instantiate I2S based sound card on Snow
board. It has MAX98095 audio codec on board.

There are some other variants for Snow board which have MAX98090
audio codec. Hence support for MAX98090 is also added to this
driver.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Tushar Behera 2014-04-28 10:14:39 +05:30 committed by Mark Brown
parent d66eac3e2b
commit 31c26a6a84
4 changed files with 151 additions and 0 deletions

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@ -0,0 +1,17 @@
Audio Binding for Snow boards
Required properties:
- compatible : Can be one of the following,
"google,snow-audio-max98090" or
"google,snow-audio-max98095"
- samsung,i2s-controller: The phandle of the Samsung I2S controller
- samsung,audio-codec: The phandle of the audio codec
Example:
sound {
compatible = "google,snow-audio-max98095";
samsung,i2s-controller = <&i2s0>;
samsung,audio-codec = <&max98095>;
};

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@ -231,3 +231,13 @@ config SND_SOC_LITTLEMILL
select SND_SAMSUNG_I2S
select MFD_WM8994
select SND_SOC_WM8994
config SND_SOC_SNOW
tristate "Audio support for Google Snow boards"
depends on SND_SOC_SAMSUNG
select SND_SOC_MAX98090
select SND_SOC_MAX98095
select SND_SAMSUNG_I2S
help
Say Y if you want to add audio support for various Snow
boards based on Exynos5 series of SoCs.

View file

@ -34,6 +34,7 @@ snd-soc-h1940-uda1380-objs := h1940_uda1380.o
snd-soc-rx1950-uda1380-objs := rx1950_uda1380.o
snd-soc-smdk-wm8580-objs := smdk_wm8580.o
snd-soc-smdk-wm8994-objs := smdk_wm8994.o
snd-soc-snow-objs := snow.o
snd-soc-smdk-wm9713-objs := smdk_wm9713.o
snd-soc-s3c64xx-smartq-wm8987-objs := smartq_wm8987.o
snd-soc-goni-wm8994-objs := goni_wm8994.o
@ -58,6 +59,7 @@ obj-$(CONFIG_SND_SOC_SAMSUNG_H1940_UDA1380) += snd-soc-h1940-uda1380.o
obj-$(CONFIG_SND_SOC_SAMSUNG_RX1950_UDA1380) += snd-soc-rx1950-uda1380.o
obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_WM8580) += snd-soc-smdk-wm8580.o
obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_WM8994) += snd-soc-smdk-wm8994.o
obj-$(CONFIG_SND_SOC_SNOW) += snd-soc-snow.o
obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_WM9713) += snd-soc-smdk-wm9713.o
obj-$(CONFIG_SND_SOC_SMARTQ) += snd-soc-s3c64xx-smartq-wm8987.o
obj-$(CONFIG_SND_SOC_SAMSUNG_SMDK_SPDIF) += snd-soc-smdk-spdif.o

122
sound/soc/samsung/snow.c Normal file
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@ -0,0 +1,122 @@
/*
* ASoC machine driver for Snow boards
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <sound/soc.h>
#include "i2s.h"
#define FIN_PLL_RATE 24000000
static struct snd_soc_dai_link snow_dai[] = {
{
.name = "Primary",
.stream_name = "Primary",
.codec_dai_name = "HiFi",
.dai_fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
},
};
static int snow_late_probe(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
struct snd_soc_dai *cpu_dai = card->rtd[0].cpu_dai;
int ret;
/* Set the MCLK rate for the codec */
ret = snd_soc_dai_set_sysclk(codec_dai, 0,
FIN_PLL_RATE, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* Select I2S Bus clock to set RCLK and BCLK */
ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
0, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_card snow_snd = {
.name = "Snow-I2S",
.dai_link = snow_dai,
.num_links = ARRAY_SIZE(snow_dai),
.late_probe = snow_late_probe,
};
static int snow_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snow_snd;
struct device_node *i2s_node, *codec_node;
int i, ret;
i2s_node = of_parse_phandle(pdev->dev.of_node,
"samsung,i2s-controller", 0);
if (!i2s_node) {
dev_err(&pdev->dev,
"Property 'i2s-controller' missing or invalid\n");
return -EINVAL;
}
codec_node = of_parse_phandle(pdev->dev.of_node,
"samsung,audio-codec", 0);
if (!codec_node) {
dev_err(&pdev->dev,
"Property 'audio-codec' missing or invalid\n");
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
snow_dai[i].codec_of_node = codec_node;
snow_dai[i].cpu_of_node = i2s_node;
snow_dai[i].platform_of_node = i2s_node;
}
card->dev = &pdev->dev;
ret = devm_snd_soc_register_card(&pdev->dev, card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
return ret;
}
return ret;
}
static const struct of_device_id snow_of_match[] = {
{ .compatible = "google,snow-audio-max98090", },
{ .compatible = "google,snow-audio-max98095", },
{},
};
static struct platform_driver snow_driver = {
.driver = {
.name = "snow-audio",
.owner = THIS_MODULE,
.of_match_table = snow_of_match,
},
.probe = snow_probe,
};
module_platform_driver(snow_driver);
MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
MODULE_LICENSE("GPL");