220 lines
4.9 KiB
C
220 lines
4.9 KiB
C
![]() |
/*
|
||
|
* Copyright (C) 2017 Samsung Electronics Co., Ltd.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License version 2 as
|
||
|
* published by the Free Software Foundation.
|
||
|
*/
|
||
|
|
||
|
#include <linux/clk.h>
|
||
|
#include <linux/of.h>
|
||
|
#include <linux/of_device.h>
|
||
|
#include <linux/module.h>
|
||
|
#include <sound/soc.h>
|
||
|
#include <sound/pcm_params.h>
|
||
|
#include "i2s.h"
|
||
|
#include "i2s-regs.h"
|
||
|
|
||
|
struct odroid_priv {
|
||
|
struct snd_soc_card card;
|
||
|
struct snd_soc_dai_link dai_link;
|
||
|
|
||
|
struct clk *pll;
|
||
|
struct clk *rclk;
|
||
|
};
|
||
|
|
||
|
static int odroid_card_startup(struct snd_pcm_substream *substream)
|
||
|
{
|
||
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
|
||
|
snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int odroid_card_hw_params(struct snd_pcm_substream *substream,
|
||
|
struct snd_pcm_hw_params *params)
|
||
|
{
|
||
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
|
||
|
unsigned int pll_freq, rclk_freq;
|
||
|
int ret;
|
||
|
|
||
|
switch (params_rate(params)) {
|
||
|
case 32000:
|
||
|
case 64000:
|
||
|
pll_freq = 131072000U;
|
||
|
break;
|
||
|
case 44100:
|
||
|
case 88200:
|
||
|
case 176400:
|
||
|
pll_freq = 180633600U;
|
||
|
break;
|
||
|
case 48000:
|
||
|
case 96000:
|
||
|
case 192000:
|
||
|
pll_freq = 196608000U;
|
||
|
break;
|
||
|
default:
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
ret = clk_set_rate(priv->pll, pll_freq + 1);
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
rclk_freq = params_rate(params) * 256 * 4;
|
||
|
|
||
|
ret = clk_set_rate(priv->rclk, rclk_freq);
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
if (rtd->num_codecs > 1) {
|
||
|
struct snd_soc_dai *codec_dai = rtd->codec_dais[1];
|
||
|
|
||
|
ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,
|
||
|
SND_SOC_CLOCK_IN);
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct snd_soc_ops odroid_card_ops = {
|
||
|
.startup = odroid_card_startup,
|
||
|
.hw_params = odroid_card_hw_params,
|
||
|
};
|
||
|
|
||
|
static void odroid_put_codec_of_nodes(struct snd_soc_dai_link *link)
|
||
|
{
|
||
|
struct snd_soc_dai_link_component *component = link->codecs;
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < link->num_codecs; i++, component++) {
|
||
|
if (!component->of_node)
|
||
|
break;
|
||
|
of_node_put(component->of_node);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int odroid_audio_probe(struct platform_device *pdev)
|
||
|
{
|
||
|
struct device *dev = &pdev->dev;
|
||
|
struct device_node *cpu, *codec;
|
||
|
struct odroid_priv *priv;
|
||
|
struct snd_soc_dai_link *link;
|
||
|
struct snd_soc_card *card;
|
||
|
int ret;
|
||
|
|
||
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
||
|
if (!priv)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
card = &priv->card;
|
||
|
card->dev = dev;
|
||
|
|
||
|
card->owner = THIS_MODULE;
|
||
|
card->fully_routed = true;
|
||
|
|
||
|
snd_soc_card_set_drvdata(card, priv);
|
||
|
|
||
|
priv->pll = devm_clk_get(dev, "epll");
|
||
|
if (IS_ERR(priv->pll))
|
||
|
return PTR_ERR(priv->pll);
|
||
|
|
||
|
priv->rclk = devm_clk_get(dev, "i2s_rclk");
|
||
|
if (IS_ERR(priv->rclk))
|
||
|
return PTR_ERR(priv->rclk);
|
||
|
|
||
|
ret = snd_soc_of_parse_card_name(card, "model");
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {
|
||
|
ret = snd_soc_of_parse_audio_simple_widgets(card,
|
||
|
"samsung,audio-widgets");
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {
|
||
|
ret = snd_soc_of_parse_audio_routing(card,
|
||
|
"samsung,audio-routing");
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
link = &priv->dai_link;
|
||
|
|
||
|
link->ops = &odroid_card_ops;
|
||
|
link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
|
||
|
SND_SOC_DAIFMT_CBS_CFS;
|
||
|
|
||
|
card->dai_link = &priv->dai_link;
|
||
|
card->num_links = 1;
|
||
|
|
||
|
cpu = of_get_child_by_name(dev->of_node, "cpu");
|
||
|
codec = of_get_child_by_name(dev->of_node, "codec");
|
||
|
|
||
|
link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
|
||
|
if (!link->cpu_of_node) {
|
||
|
dev_err(dev, "Failed parsing cpu/sound-dai property\n");
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
|
||
|
if (ret < 0)
|
||
|
goto err_put_codec_n;
|
||
|
|
||
|
link->platform_of_node = link->cpu_of_node;
|
||
|
|
||
|
link->name = "Primary";
|
||
|
link->stream_name = link->name;
|
||
|
|
||
|
ret = devm_snd_soc_register_card(dev, card);
|
||
|
if (ret < 0) {
|
||
|
dev_err(dev, "snd_soc_register_card() failed: %d\n", ret);
|
||
|
goto err_put_i2s_n;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
err_put_i2s_n:
|
||
|
of_node_put(link->cpu_of_node);
|
||
|
err_put_codec_n:
|
||
|
odroid_put_codec_of_nodes(link);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int odroid_audio_remove(struct platform_device *pdev)
|
||
|
{
|
||
|
struct odroid_priv *priv = platform_get_drvdata(pdev);
|
||
|
|
||
|
of_node_put(priv->dai_link.cpu_of_node);
|
||
|
odroid_put_codec_of_nodes(&priv->dai_link);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct of_device_id odroid_audio_of_match[] = {
|
||
|
{ .compatible = "samsung,odroid-xu3-audio" },
|
||
|
{ .compatible = "samsung,odroid-xu4-audio"},
|
||
|
{ },
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
|
||
|
|
||
|
static struct platform_driver odroid_audio_driver = {
|
||
|
.driver = {
|
||
|
.name = "odroid-audio",
|
||
|
.of_match_table = odroid_audio_of_match,
|
||
|
.pm = &snd_soc_pm_ops,
|
||
|
},
|
||
|
.probe = odroid_audio_probe,
|
||
|
.remove = odroid_audio_remove,
|
||
|
};
|
||
|
module_platform_driver(odroid_audio_driver);
|
||
|
|
||
|
MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
|
||
|
MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");
|
||
|
MODULE_LICENSE("GPL v2");
|