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// SPDX-License-Identifier: GPL-2.0
//
// dummy_codec.c -- dummy audio codec for rockchip
//
// Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
struct dummy_codec_priv {
struct snd_soc_component *component;
struct clk *mclk;
};
static int dummy_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct dummy_codec_priv *dcp = snd_soc_component_get_drvdata(dai->component);
if (!IS_ERR(dcp->mclk))
clk_prepare_enable(dcp->mclk);
return 0;
}
static void dummy_codec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct dummy_codec_priv *dcp = snd_soc_component_get_drvdata(dai->component);
if (!IS_ERR(dcp->mclk))
clk_disable_unprepare(dcp->mclk);
}
static struct snd_soc_dai_ops dummy_codec_dai_ops = {
.startup = dummy_codec_startup,
.shutdown = dummy_codec_shutdown,
};
struct snd_soc_dai_driver dummy_dai = {
.name = "dummy_codec",
.playback = {
.stream_name = "Dummy Playback",
.channels_min = 2,
.channels_max = 384,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE),
},
.capture = {
.stream_name = "Dummy Capture",
.channels_min = 2,
.channels_max = 384,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE),
},
.ops = &dummy_codec_dai_ops,
};
static const struct snd_soc_component_driver soc_dummy_codec;
static int rockchip_dummy_codec_probe(struct platform_device *pdev)
{
struct dummy_codec_priv *dcp;
dcp = devm_kzalloc(&pdev->dev, sizeof(*dcp), GFP_KERNEL);
if (!dcp)
return -ENOMEM;
platform_set_drvdata(pdev, dcp);
/* optional mclk, if needs, assign mclk in dts node */
dcp->mclk = devm_clk_get(&pdev->dev, "mclk");
if (IS_ERR(dcp->mclk)) {
if (PTR_ERR(dcp->mclk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
else if (PTR_ERR(dcp->mclk) != -ENOENT)
return -EINVAL;
}
return devm_snd_soc_register_component(&pdev->dev, &soc_dummy_codec,
&dummy_dai, 1);
}
static const struct of_device_id rockchip_dummy_codec_of_match[] = {
{ .compatible = "rockchip,dummy-codec", },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_dummy_codec_of_match);
static struct platform_driver rockchip_dummy_codec_driver = {
.driver = {
.name = "dummy_codec",
.of_match_table = of_match_ptr(rockchip_dummy_codec_of_match),
},
.probe = rockchip_dummy_codec_probe,
};
module_platform_driver(rockchip_dummy_codec_driver);
MODULE_AUTHOR("Sugar <sugar.zhang@rock-chips.com>");
MODULE_DESCRIPTION("Rockchip Dummy Codec Driver");
MODULE_LICENSE("GPL v2");
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