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/*
* Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/control.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include <linux/pinctrl/consumer.h>
#include <linux/mfd/syscon.h>
struct imx_priv {
struct platform_device *pdev;
struct snd_soc_card card;
struct clk *codec_clk;
unsigned int clk_frequency;
};
static const struct snd_soc_dapm_widget imx_wm8524_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Line Out Jack", NULL),
SND_SOC_DAPM_LINE("Line In Jack", NULL),
};
static int imx_hifi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_card *card = rtd->card;
struct device *dev = card->dev;
unsigned int fmt;
int ret = 0;
fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret) {
dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2,
params_physical_width(params));
if (ret) {
dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
return ret;
}
return ret;
}
static struct snd_soc_ops imx_hifi_ops = {
.hw_params = imx_hifi_hw_params,
};
static struct snd_soc_dai_link imx_wm8524_dai[] = {
{
.name = "HiFi",
.stream_name = "HiFi",
.codec_dai_name = "wm8524-hifi",
.ops = &imx_hifi_ops,
},
};
static int imx_wm8524_late_probe(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd = list_first_entry(
&card->rtd_list, struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct imx_priv *priv = snd_soc_card_get_drvdata(card);
int ret;
priv->clk_frequency = clk_get_rate(priv->codec_clk);
ret = snd_soc_dai_set_sysclk(codec_dai, 0, priv->clk_frequency,
SND_SOC_CLOCK_IN);
return 0;
}
static int imx_wm8524_probe(struct platform_device *pdev)
{
struct device_node *cpu_np, *codec_np = NULL;
struct platform_device *cpu_pdev;
struct imx_priv *priv;
struct platform_device *codec_pdev = NULL;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->pdev = pdev;
cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
ret = -EINVAL;
goto fail;
}
codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "phandle missing or invalid\n");
ret = -EINVAL;
goto fail;
}
cpu_pdev = of_find_device_by_node(cpu_np);
if (!cpu_pdev) {
dev_err(&pdev->dev, "failed to find SAI platform device\n");
ret = -EINVAL;
goto fail;
}
codec_pdev = of_find_device_by_node(codec_np);
if (!codec_pdev || !codec_pdev->dev.driver) {
dev_err(&pdev->dev, "failed to find codec platform device\n");
ret = -EINVAL;
goto fail;
}
priv->codec_clk = devm_clk_get(&codec_pdev->dev, "mclk");
if (IS_ERR(priv->codec_clk)) {
ret = PTR_ERR(priv->codec_clk);
dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
goto fail;
}
priv->card.dai_link = imx_wm8524_dai;
imx_wm8524_dai[0].codec_of_node = codec_np;
imx_wm8524_dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
imx_wm8524_dai[0].platform_of_node = cpu_np;
imx_wm8524_dai[0].playback_only = 1;
priv->card.late_probe = imx_wm8524_late_probe;
priv->card.num_links = 1;
priv->card.dev = &pdev->dev;
priv->card.owner = THIS_MODULE;
priv->card.dapm_widgets = imx_wm8524_dapm_widgets;
priv->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8524_dapm_widgets);
ret = snd_soc_of_parse_card_name(&priv->card, "model");
if (ret)
goto fail;
ret = snd_soc_of_parse_audio_routing(&priv->card, "audio-routing");
if (ret)
goto fail;
snd_soc_card_set_drvdata(&priv->card, priv);
ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
goto fail;
}
ret = 0;
fail:
if (cpu_np)
of_node_put(cpu_np);
if (codec_np)
of_node_put(codec_np);
return ret;
}
static const struct of_device_id imx_wm8524_dt_ids[] = {
{ .compatible = "fsl,imx-audio-wm8524", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_wm8524_dt_ids);
static struct platform_driver imx_wm8524_driver = {
.driver = {
.name = "imx-wm8524",
.pm = &snd_soc_pm_ops,
.of_match_table = imx_wm8524_dt_ids,
},
.probe = imx_wm8524_probe,
};
module_platform_driver(imx_wm8524_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Freescale i.MX WM8524 ASoC machine driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:imx-wm8524");
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