linux/sound/soc/samsung/odroid.c

368 lines
8.9 KiB
C

// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2017 Samsung Electronics Co., Ltd.
#include <linux/clk.h>
#include <linux/clk-provider.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 clk *clk_i2s_bus;
struct clk *sclk_i2s;
/* Spinlock protecting fields below */
spinlock_t lock;
unsigned int be_sample_rate;
bool be_active;
};
static int odroid_card_fe_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_fe_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 long flags;
int ret = 0;
spin_lock_irqsave(&priv->lock, flags);
if (priv->be_active && priv->be_sample_rate != params_rate(params))
ret = -EINVAL;
spin_unlock_irqrestore(&priv->lock, flags);
return ret;
}
static const struct snd_soc_ops odroid_card_fe_ops = {
.startup = odroid_card_fe_startup,
.hw_params = odroid_card_fe_hw_params,
};
static int odroid_card_be_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, rfs;
unsigned long flags;
int ret;
switch (params_rate(params)) {
case 64000:
pll_freq = 196608001U;
rfs = 384;
break;
case 44100:
case 88200:
pll_freq = 180633609U;
rfs = 512;
break;
case 32000:
case 48000:
case 96000:
pll_freq = 196608001U;
rfs = 512;
break;
default:
return -EINVAL;
}
ret = clk_set_rate(priv->clk_i2s_bus, pll_freq / 2 + 1);
if (ret < 0)
return ret;
/*
* We add 2 to the rclk_freq value in order to avoid too low clock
* frequency values due to the EPLL output frequency not being exact
* multiple of the audio sampling rate.
*/
rclk_freq = params_rate(params) * rfs + 2;
ret = clk_set_rate(priv->sclk_i2s, 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;
}
spin_lock_irqsave(&priv->lock, flags);
priv->be_sample_rate = params_rate(params);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
priv->be_active = true;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
priv->be_active = false;
break;
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static const struct snd_soc_ops odroid_card_be_ops = {
.hw_params = odroid_card_be_hw_params,
.trigger = odroid_card_be_trigger,
};
/* DAPM routes for backward compatibility with old DTS */
static const struct snd_soc_dapm_route odroid_dapm_routes[] = {
{ "I2S Playback", NULL, "Mixer DAI TX" },
{ "HiFi Playback", NULL, "Mixer DAI TX" },
};
SND_SOC_DAILINK_DEFS(primary,
DAILINK_COMP_ARRAY(COMP_EMPTY()),
DAILINK_COMP_ARRAY(COMP_DUMMY()),
DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s")));
SND_SOC_DAILINK_DEFS(mixer,
DAILINK_COMP_ARRAY(COMP_DUMMY()),
DAILINK_COMP_ARRAY(COMP_EMPTY()),
DAILINK_COMP_ARRAY(COMP_DUMMY()));
SND_SOC_DAILINK_DEFS(secondary,
DAILINK_COMP_ARRAY(COMP_EMPTY()),
DAILINK_COMP_ARRAY(COMP_DUMMY()),
DAILINK_COMP_ARRAY(COMP_PLATFORM("3830000.i2s-sec")));
static struct snd_soc_dai_link odroid_card_dais[] = {
{
/* Primary FE <-> BE link */
.ops = &odroid_card_fe_ops,
.name = "Primary",
.stream_name = "Primary",
.dynamic = 1,
.dpcm_playback = 1,
SND_SOC_DAILINK_REG(primary),
}, {
/* BE <-> CODECs link */
.name = "I2S Mixer",
.ops = &odroid_card_be_ops,
.no_pcm = 1,
.dpcm_playback = 1,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
SND_SOC_DAILINK_REG(mixer),
}, {
/* Secondary FE <-> BE link */
.playback_only = 1,
.ops = &odroid_card_fe_ops,
.name = "Secondary",
.stream_name = "Secondary",
.dynamic = 1,
.dpcm_playback = 1,
SND_SOC_DAILINK_REG(secondary),
}
};
static int odroid_audio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *cpu_dai = NULL;
struct device_node *cpu, *codec;
struct odroid_priv *priv;
struct snd_soc_card *card;
struct snd_soc_dai_link *link, *codec_link;
int num_pcms, ret, i;
struct of_phandle_args args = {};
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;
spin_lock_init(&priv->lock);
snd_soc_card_set_drvdata(card, priv);
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;
}
card->dai_link = odroid_card_dais;
card->num_links = ARRAY_SIZE(odroid_card_dais);
cpu = of_get_child_by_name(dev->of_node, "cpu");
codec = of_get_child_by_name(dev->of_node, "codec");
link = card->dai_link;
codec_link = &card->dai_link[1];
/*
* For backwards compatibility create the secondary CPU DAI link only
* if there are 2 CPU DAI entries in the cpu sound-dai property in DT.
* Also add required DAPM routes not available in old DTS.
*/
num_pcms = of_count_phandle_with_args(cpu, "sound-dai",
"#sound-dai-cells");
if (num_pcms == 1) {
card->dapm_routes = odroid_dapm_routes;
card->num_dapm_routes = ARRAY_SIZE(odroid_dapm_routes);
card->num_links--;
}
for (i = 0; i < num_pcms; i++, link += 2) {
ret = of_parse_phandle_with_args(cpu, "sound-dai",
"#sound-dai-cells", i, &args);
if (ret < 0)
break;
if (!args.np) {
dev_err(dev, "sound-dai property parse error: %d\n", ret);
ret = -EINVAL;
break;
}
ret = snd_soc_get_dai_name(&args, &link->cpus->dai_name);
of_node_put(args.np);
if (ret < 0)
break;
}
if (ret == 0) {
cpu_dai = of_parse_phandle(cpu, "sound-dai", 0);
if (!cpu_dai)
ret = -EINVAL;
}
of_node_put(cpu);
if (ret < 0)
goto err_put_node;
ret = snd_soc_of_get_dai_link_codecs(dev, codec, codec_link);
if (ret < 0)
goto err_put_cpu_dai;
/* Set capture capability only for boards with the MAX98090 CODEC */
if (codec_link->num_codecs > 1) {
card->dai_link[0].dpcm_capture = 1;
card->dai_link[1].dpcm_capture = 1;
}
priv->sclk_i2s = of_clk_get_by_name(cpu_dai, "i2s_opclk1");
if (IS_ERR(priv->sclk_i2s)) {
ret = PTR_ERR(priv->sclk_i2s);
goto err_put_cpu_dai;
}
priv->clk_i2s_bus = of_clk_get_by_name(cpu_dai, "iis");
if (IS_ERR(priv->clk_i2s_bus)) {
ret = PTR_ERR(priv->clk_i2s_bus);
goto err_put_sclk;
}
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_clk_i2s;
}
of_node_put(cpu_dai);
of_node_put(codec);
return 0;
err_put_clk_i2s:
clk_put(priv->clk_i2s_bus);
err_put_sclk:
clk_put(priv->sclk_i2s);
err_put_cpu_dai:
of_node_put(cpu_dai);
snd_soc_of_put_dai_link_codecs(codec_link);
err_put_node:
of_node_put(codec);
return ret;
}
static int odroid_audio_remove(struct platform_device *pdev)
{
struct odroid_priv *priv = platform_get_drvdata(pdev);
snd_soc_of_put_dai_link_codecs(&priv->card.dai_link[1]);
clk_put(priv->sclk_i2s);
clk_put(priv->clk_i2s_bus);
return 0;
}
static const struct of_device_id odroid_audio_of_match[] = {
{ .compatible = "hardkernel,odroid-xu3-audio" },
{ .compatible = "hardkernel,odroid-xu4-audio" },
{ .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");