mirror of https://gitee.com/openkylin/linux.git
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include <linux/module.h>
|
|
#include <sound/soc.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
|
|
#include "../codecs/wm8940.h"
|
|
#include "pxa2xx-i2s.h"
|
|
|
|
static int imote2_asoc_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
|
|
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
|
|
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
|
|
unsigned int clk = 0;
|
|
int ret;
|
|
|
|
switch (params_rate(params)) {
|
|
case 8000:
|
|
case 16000:
|
|
case 48000:
|
|
case 96000:
|
|
clk = 12288000;
|
|
break;
|
|
case 11025:
|
|
case 22050:
|
|
case 44100:
|
|
clk = 11289600;
|
|
break;
|
|
}
|
|
|
|
ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
|
|
SND_SOC_CLOCK_IN);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* set the I2S system clock as input (unused) */
|
|
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
|
|
SND_SOC_CLOCK_OUT);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct snd_soc_ops imote2_asoc_ops = {
|
|
.hw_params = imote2_asoc_hw_params,
|
|
};
|
|
|
|
SND_SOC_DAILINK_DEFS(wm8940,
|
|
DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
|
|
DAILINK_COMP_ARRAY(COMP_CODEC("wm8940-codec.0-0034",
|
|
"wm8940-hifi")),
|
|
DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
|
|
|
|
static struct snd_soc_dai_link imote2_dai = {
|
|
.name = "WM8940",
|
|
.stream_name = "WM8940",
|
|
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
|
|
SND_SOC_DAIFMT_CBS_CFS,
|
|
.ops = &imote2_asoc_ops,
|
|
SND_SOC_DAILINK_REG(wm8940),
|
|
};
|
|
|
|
static struct snd_soc_card imote2 = {
|
|
.name = "Imote2",
|
|
.owner = THIS_MODULE,
|
|
.dai_link = &imote2_dai,
|
|
.num_links = 1,
|
|
};
|
|
|
|
static int imote2_probe(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_card *card = &imote2;
|
|
int ret;
|
|
|
|
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;
|
|
}
|
|
|
|
static struct platform_driver imote2_driver = {
|
|
.driver = {
|
|
.name = "imote2-audio",
|
|
.pm = &snd_soc_pm_ops,
|
|
},
|
|
.probe = imote2_probe,
|
|
};
|
|
|
|
module_platform_driver(imote2_driver);
|
|
|
|
MODULE_AUTHOR("Jonathan Cameron");
|
|
MODULE_DESCRIPTION("ALSA SoC Imote 2");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:imote2-audio");
|