forked from Minki/linux
757652dd59
Add mclk-fs support to audio graph card as it was previously implemented in simple card. Signed-off-by: Olivier Moysan <olivier.moysan@st.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@kernel.org>
371 lines
9.8 KiB
C
371 lines
9.8 KiB
C
/*
|
|
* ASoC audio graph sound card support
|
|
*
|
|
* Copyright (C) 2016 Renesas Solutions Corp.
|
|
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
|
|
*
|
|
* based on ${LINUX}/sound/soc/generic/simple-card.c
|
|
*
|
|
* 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/device.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of_graph.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/string.h>
|
|
#include <sound/jack.h>
|
|
#include <sound/simple_card_utils.h>
|
|
|
|
struct graph_card_data {
|
|
struct snd_soc_card snd_card;
|
|
struct graph_dai_props {
|
|
struct asoc_simple_dai cpu_dai;
|
|
struct asoc_simple_dai codec_dai;
|
|
unsigned int mclk_fs;
|
|
} *dai_props;
|
|
unsigned int mclk_fs;
|
|
struct snd_soc_dai_link *dai_link;
|
|
struct gpio_desc *pa_gpio;
|
|
};
|
|
|
|
static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w,
|
|
struct snd_kcontrol *kcontrol,
|
|
int event)
|
|
{
|
|
struct snd_soc_dapm_context *dapm = w->dapm;
|
|
struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card);
|
|
|
|
switch (event) {
|
|
case SND_SOC_DAPM_POST_PMU:
|
|
gpiod_set_value_cansleep(priv->pa_gpio, 1);
|
|
break;
|
|
case SND_SOC_DAPM_PRE_PMD:
|
|
gpiod_set_value_cansleep(priv->pa_gpio, 0);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = {
|
|
SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
|
|
0, 0, NULL, 0, asoc_graph_card_outdrv_event,
|
|
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
|
|
};
|
|
|
|
#define graph_priv_to_card(priv) (&(priv)->snd_card)
|
|
#define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
|
|
#define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
|
|
#define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
|
|
|
|
static int asoc_graph_card_startup(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
|
|
struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
|
|
int ret;
|
|
|
|
ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
|
|
if (ret)
|
|
asoc_simple_card_clk_disable(&dai_props->cpu_dai);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void asoc_graph_card_shutdown(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
|
|
struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
|
|
|
|
asoc_simple_card_clk_disable(&dai_props->cpu_dai);
|
|
|
|
asoc_simple_card_clk_disable(&dai_props->codec_dai);
|
|
}
|
|
|
|
static int asoc_graph_card_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 *codec_dai = rtd->codec_dai;
|
|
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
|
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
|
|
struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
|
|
unsigned int mclk, mclk_fs = 0;
|
|
int ret = 0;
|
|
|
|
if (priv->mclk_fs)
|
|
mclk_fs = priv->mclk_fs;
|
|
else if (dai_props->mclk_fs)
|
|
mclk_fs = dai_props->mclk_fs;
|
|
|
|
if (mclk_fs) {
|
|
mclk = params_rate(params) * mclk_fs;
|
|
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
|
|
SND_SOC_CLOCK_IN);
|
|
if (ret && ret != -ENOTSUPP)
|
|
goto err;
|
|
|
|
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
|
|
SND_SOC_CLOCK_OUT);
|
|
if (ret && ret != -ENOTSUPP)
|
|
goto err;
|
|
}
|
|
return 0;
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static const struct snd_soc_ops asoc_graph_card_ops = {
|
|
.startup = asoc_graph_card_startup,
|
|
.shutdown = asoc_graph_card_shutdown,
|
|
.hw_params = asoc_graph_card_hw_params,
|
|
};
|
|
|
|
static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
|
|
{
|
|
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
|
|
struct snd_soc_dai *codec = rtd->codec_dai;
|
|
struct snd_soc_dai *cpu = rtd->cpu_dai;
|
|
struct graph_dai_props *dai_props =
|
|
graph_priv_to_props(priv, rtd->num);
|
|
int ret;
|
|
|
|
ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asoc_graph_card_dai_link_of(struct device_node *cpu_port,
|
|
struct graph_card_data *priv,
|
|
int idx)
|
|
{
|
|
struct device *dev = graph_priv_to_dev(priv);
|
|
struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
|
|
struct graph_dai_props *dai_props = graph_priv_to_props(priv, idx);
|
|
struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
|
|
struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
|
|
struct device_node *cpu_ep = of_get_next_child(cpu_port, NULL);
|
|
struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
|
|
struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
|
|
int ret;
|
|
|
|
if (rcpu_ep != cpu_ep) {
|
|
dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n",
|
|
cpu_ep->name, codec_ep->name, rcpu_ep->name);
|
|
ret = -EINVAL;
|
|
goto dai_link_of_err;
|
|
}
|
|
|
|
ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
|
|
NULL, &dai_link->dai_fmt);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
of_property_read_u32(rcpu_ep, "mclk-fs", &dai_props->mclk_fs);
|
|
|
|
ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_canonicalize_dailink(dai_link);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
ret = asoc_simple_card_set_dailink_name(dev, dai_link,
|
|
"%s-%s",
|
|
dai_link->cpu_dai_name,
|
|
dai_link->codec_dai_name);
|
|
if (ret < 0)
|
|
goto dai_link_of_err;
|
|
|
|
dai_link->ops = &asoc_graph_card_ops;
|
|
dai_link->init = asoc_graph_card_dai_init;
|
|
|
|
asoc_simple_card_canonicalize_cpu(dai_link,
|
|
of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
|
|
|
|
dai_link_of_err:
|
|
of_node_put(cpu_ep);
|
|
of_node_put(rcpu_ep);
|
|
of_node_put(codec_ep);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int asoc_graph_card_parse_of(struct graph_card_data *priv)
|
|
{
|
|
struct of_phandle_iterator it;
|
|
struct device *dev = graph_priv_to_dev(priv);
|
|
struct snd_soc_card *card = graph_priv_to_card(priv);
|
|
struct device_node *node = dev->of_node;
|
|
int rc, idx = 0;
|
|
int ret;
|
|
|
|
ret = asoc_simple_card_of_parse_widgets(card, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = asoc_simple_card_of_parse_routing(card, NULL, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Factor to mclk, used in hw_params() */
|
|
of_property_read_u32(node, "mclk-fs", &priv->mclk_fs);
|
|
|
|
of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
|
|
ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
|
|
if (ret < 0) {
|
|
of_node_put(it.node);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return asoc_simple_card_parse_card_name(card, NULL);
|
|
}
|
|
|
|
static int asoc_graph_get_dais_count(struct device *dev)
|
|
{
|
|
struct of_phandle_iterator it;
|
|
struct device_node *node = dev->of_node;
|
|
int count = 0;
|
|
int rc;
|
|
|
|
of_for_each_phandle(&it, rc, node, "dais", NULL, 0)
|
|
count++;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int asoc_graph_card_probe(struct platform_device *pdev)
|
|
{
|
|
struct graph_card_data *priv;
|
|
struct snd_soc_dai_link *dai_link;
|
|
struct graph_dai_props *dai_props;
|
|
struct device *dev = &pdev->dev;
|
|
struct snd_soc_card *card;
|
|
int num, ret;
|
|
|
|
/* Allocate the private data and the DAI link array */
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
num = asoc_graph_get_dais_count(dev);
|
|
if (num == 0)
|
|
return -EINVAL;
|
|
|
|
dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
|
|
dai_link = devm_kzalloc(dev, sizeof(*dai_link) * num, GFP_KERNEL);
|
|
if (!dai_props || !dai_link)
|
|
return -ENOMEM;
|
|
|
|
priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->pa_gpio)) {
|
|
ret = PTR_ERR(priv->pa_gpio);
|
|
dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
priv->dai_props = dai_props;
|
|
priv->dai_link = dai_link;
|
|
|
|
/* Init snd_soc_card */
|
|
card = graph_priv_to_card(priv);
|
|
card->owner = THIS_MODULE;
|
|
card->dev = dev;
|
|
card->dai_link = dai_link;
|
|
card->num_links = num;
|
|
card->dapm_widgets = asoc_graph_card_dapm_widgets;
|
|
card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets);
|
|
|
|
ret = asoc_graph_card_parse_of(priv);
|
|
if (ret < 0) {
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_err(dev, "parse error %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
snd_soc_card_set_drvdata(card, priv);
|
|
|
|
ret = devm_snd_soc_register_card(dev, card);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
asoc_simple_card_clean_reference(card);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int asoc_graph_card_remove(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_card *card = platform_get_drvdata(pdev);
|
|
|
|
return asoc_simple_card_clean_reference(card);
|
|
}
|
|
|
|
static const struct of_device_id asoc_graph_of_match[] = {
|
|
{ .compatible = "audio-graph-card", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
|
|
|
|
static struct platform_driver asoc_graph_card = {
|
|
.driver = {
|
|
.name = "asoc-audio-graph-card",
|
|
.pm = &snd_soc_pm_ops,
|
|
.of_match_table = asoc_graph_of_match,
|
|
},
|
|
.probe = asoc_graph_card_probe,
|
|
.remove = asoc_graph_card_remove,
|
|
};
|
|
module_platform_driver(asoc_graph_card);
|
|
|
|
MODULE_ALIAS("platform:asoc-audio-graph-card");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|