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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/i2c.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 "fsl_sai.h"
#define SUPPORT_RATE_NUM 10
struct imx_sii902x_data {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
bool is_stream_opened[2];
};
static int imx_sii902x_startup(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
static struct snd_pcm_hw_constraint_list constraint_rates;
static u32 support_rates[SUPPORT_RATE_NUM];
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 imx_sii902x_data *data = snd_soc_card_get_drvdata(card);
struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int ret;
data->is_stream_opened[tx] = true;
if (data->is_stream_opened[tx] != sai->is_stream_opened[tx] ||
data->is_stream_opened[!tx] != sai->is_stream_opened[!tx]) {
data->is_stream_opened[tx] = false;
return -EBUSY;
}
support_rates[0] = 32000;
support_rates[1] = 48000;
support_rates[2] = 96000;
support_rates[3] = 192000;
constraint_rates.list = support_rates;
constraint_rates.count = 4;
ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
&constraint_rates);
if (ret)
return ret;
ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1, 2);
if (ret)
return ret;
return 0;
}
static int imx_sii902x_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;
int ret;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai,
SND_SOC_DAIFMT_LEFT_J |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (ret) {
dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
if (ret) {
dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, 24);
if (ret) {
dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
return ret;
}
return 0;
}
static void imx_sii902x_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card *card = rtd->card;
struct imx_sii902x_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
data->is_stream_opened[tx] = false;
}
static struct snd_soc_ops imx_sii902x_ops = {
.startup = imx_sii902x_startup,
.shutdown = imx_sii902x_shutdown,
.hw_params = imx_sii902x_hw_params,
};
static int imx_sii902x_probe(struct platform_device *pdev)
{
struct device_node *cpu_np, *sii902x_np = NULL;
struct platform_device *cpu_pdev;
struct imx_sii902x_data *data;
struct snd_soc_dai_link_component *dlc;
int ret;
dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "cpu dai 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;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
data->dai.cpus = &dlc[0];
data->dai.num_cpus = 1;
data->dai.platforms = &dlc[1];
data->dai.num_platforms = 1;
data->dai.codecs = &dlc[2];
data->dai.num_codecs = 1;
data->dai.name = "sii902x hdmi";
data->dai.stream_name = "sii902x hdmi";
data->dai.codecs->dai_name = "i2s-hifi";
data->dai.codecs->name = "hdmi-audio-codec.1";
data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
data->dai.platforms->of_node = cpu_np;
data->dai.ops = &imx_sii902x_ops;
data->dai.playback_only = true;
data->dai.capture_only = false;
data->dai.dai_fmt = SND_SOC_DAIFMT_LEFT_J |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
data->card.dev = &pdev->dev;
data->card.owner = THIS_MODULE;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
platform_set_drvdata(pdev, &data->card);
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
goto fail;
}
fail:
if (cpu_np)
of_node_put(cpu_np);
if (sii902x_np)
of_node_put(sii902x_np);
return ret;
}
static const struct of_device_id imx_sii902x_dt_ids[] = {
{ .compatible = "fsl,imx-audio-sii902x", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_sii902x_dt_ids);
static struct platform_driver imx_sii902x_driver = {
.driver = {
.name = "imx-sii902x",
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
.of_match_table = imx_sii902x_dt_ids,
},
.probe = imx_sii902x_probe,
};
module_platform_driver(imx_sii902x_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Freescale i.MX SII902X hdmi audio ASoC machine driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:imx-sii902x");
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