/*
|
* sound\soc\sunxi\sunxi_sndspdif.c
|
* (C) Copyright 2010-2016
|
* AllWinner Technology Co., Ltd. <www.allwinnertech.com>
|
* wolfgang huang <huangjinhui@allwinnertech.com>
|
*
|
* some simple description for this code
|
*
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License as
|
* published by the Free Software Foundation; either version 2 of
|
* the License, or (at your option) any later version.
|
*
|
*/
|
|
#include <linux/module.h>
|
#include <linux/clk.h>
|
#include <linux/mutex.h>
|
#include <sound/pcm.h>
|
#include <sound/soc.h>
|
#include <sound/pcm_params.h>
|
#include <sound/soc-dapm.h>
|
#include <linux/io.h>
|
#include <linux/of.h>
|
#include "sunxi-spdif.h"
|
|
static int sunxi_sndspdif_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;
|
int ret, clk_div;
|
unsigned int freq;
|
|
switch (params_rate(params)) {
|
case 24000:
|
case 32000:
|
case 48000:
|
case 96000:
|
case 192000:
|
#if defined(CONFIG_AHUB_FREQ_REQ) || defined(CONFIG_ARCH_SUN50IW10)
|
freq = 98304000;
|
#else
|
freq = 24576000;
|
#endif
|
break;
|
case 22050:
|
case 44100:
|
case 176400:
|
#if defined(CONFIG_AHUB_FREQ_REQ) || defined(CONFIG_ARCH_SUN50IW10)
|
freq = 90316800;
|
#else
|
freq = 22579200;
|
#endif
|
break;
|
default:
|
pr_debug("[sunxi spdif]Invalid rate\n");
|
return -EINVAL;
|
}
|
|
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, freq, 0);
|
if (ret < 0)
|
return ret;
|
|
clk_div = freq/params_rate(params);
|
|
#ifdef SPDIF_PLL_AUDIO_X4
|
/* clk_source -> pll_audiox4: 90/98M, moduleclk: 20/24M */
|
clk_div = clk_div>>9;
|
#else
|
clk_div = clk_div>>7;
|
#endif
|
|
ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, clk_div);
|
if (ret < 0)
|
return ret;
|
|
return 0;
|
}
|
|
static struct snd_soc_ops sunxi_sndspdif_ops = {
|
.hw_params = sunxi_sndspdif_hw_params,
|
};
|
|
static struct snd_soc_dai_link sunxi_sndspdif_dai_link = {
|
.name = "SPDIF",
|
.stream_name = "SUNXI-SPDIF",
|
.cpu_dai_name = "sunxi-spdif",
|
.platform_name = "sunxi-spdif",
|
.codec_dai_name = "spdif-hifi",
|
.codec_name = "spdif-utils",
|
.ops = &sunxi_sndspdif_ops,
|
};
|
|
static struct snd_soc_card snd_soc_sunxi_sndspdif = {
|
.name = "sndspdif",
|
.owner = THIS_MODULE,
|
.dai_link = &sunxi_sndspdif_dai_link,
|
.num_links = 1,
|
};
|
|
static int sunxi_sndspdif_dev_probe(struct platform_device *pdev)
|
{
|
int ret = 0;
|
struct snd_soc_card *card = &snd_soc_sunxi_sndspdif;
|
struct device_node *np = pdev->dev.of_node;
|
struct platform_device *sunxi_snd_spdif_utils_device;
|
|
card->dev = &pdev->dev;
|
sunxi_sndspdif_dai_link.cpu_dai_name = NULL;
|
sunxi_sndspdif_dai_link.cpu_of_node = of_parse_phandle(np,
|
"sunxi,spdif-controller", 0);
|
if (!sunxi_sndspdif_dai_link.cpu_of_node) {
|
dev_err(&pdev->dev,
|
"Property 'sunxi,spdif-controller' missing\n");
|
ret = -EINVAL;
|
}
|
sunxi_sndspdif_dai_link.platform_name = NULL;
|
sunxi_sndspdif_dai_link.platform_of_node =
|
sunxi_sndspdif_dai_link.cpu_of_node;
|
|
sunxi_snd_spdif_utils_device = platform_device_alloc("spdif-utils", -1);
|
if (sunxi_snd_spdif_utils_device == NULL) {
|
dev_err(&pdev->dev, "spdif utils alloc failed\n");
|
return -ENOMEM;
|
}
|
|
ret = platform_device_add(sunxi_snd_spdif_utils_device);
|
if (ret) {
|
dev_err(&pdev->dev, "spdif utils add failed\n");
|
ret = -EBUSY;
|
goto err_utils_put;
|
}
|
|
ret = snd_soc_register_card(card);
|
if (ret) {
|
dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
|
ret = -EBUSY;
|
goto err_utils_del;
|
}
|
return ret;
|
|
err_utils_del:
|
platform_device_del(sunxi_snd_spdif_utils_device);
|
err_utils_put:
|
platform_device_put(sunxi_snd_spdif_utils_device);
|
return ret;
|
}
|
|
static int sunxi_sndspdif_dev_remove(struct platform_device *pdev)
|
{
|
struct snd_soc_card *card = platform_get_drvdata(pdev);
|
|
snd_soc_unregister_card(card);
|
return 0;
|
}
|
|
static const struct of_device_id sunxi_spdif_of_match[] = {
|
{ .compatible = "allwinner,sunxi-spdif-machine", },
|
{},
|
};
|
|
static struct platform_driver sunxi_spdif_driver = {
|
.driver = {
|
.name = "sndspdif",
|
.owner = THIS_MODULE,
|
.of_match_table = sunxi_spdif_of_match,
|
.pm = &snd_soc_pm_ops,
|
},
|
.probe = sunxi_sndspdif_dev_probe,
|
.remove = sunxi_sndspdif_dev_remove,
|
};
|
|
module_platform_driver(sunxi_spdif_driver);
|
|
MODULE_AUTHOR("wolfgang huang <huangjinhui@allwinnertech.com>");
|
MODULE_DESCRIPTION("SUNXI SPDIF ASoC audio driver");
|
MODULE_LICENSE("GPL");
|
MODULE_ALIAS("platform:sndspdif");
|
