- 根目录:
- sound
- soc
- generic
- simple-card.c
/*
* ASoC simple sound card support
*
* Copyright (C) 2012 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* 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/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/jack.h>
#include <sound/simple_card.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>
struct simple_card_data {
struct snd_soc_card snd_card;
struct simple_dai_props {
struct asoc_simple_dai cpu_dai;
struct asoc_simple_dai codec_dai;
} *dai_props;
unsigned int mclk_fs;
int gpio_hp_det;
int gpio_mic_det;
struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
};
#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + i)
#define simple_priv_to_props(priv, i) ((priv)->dai_props + i)
static int asoc_simple_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 simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
unsigned int mclk;
int ret = 0;
if (priv->mclk_fs) {
mclk = params_rate(params) * priv->mclk_fs;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
}
return ret;
}
static struct snd_soc_ops asoc_simple_card_ops = {
.hw_params = asoc_simple_card_hw_params,
};
static struct snd_soc_jack simple_card_hp_jack;
static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
{
.pin = "Headphones",
.mask = SND_JACK_HEADPHONE,
},
};
static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
.name = "Headphone detection",
.report = SND_JACK_HEADPHONE,
.debounce_time = 150,
};
static struct snd_soc_jack simple_card_mic_jack;
static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
{
.pin = "Mic Jack",
.mask = SND_JACK_MICROPHONE,
},
};
static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
.name = "Mic detection",
.report = SND_JACK_MICROPHONE,
.debounce_time = 150,
};
static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
struct asoc_simple_dai *set)
{
int ret;
if (set->fmt) {
ret = snd_soc_dai_set_fmt(dai, set->fmt);
if (ret && ret != -ENOTSUPP) {
dev_err(dai->dev, "simple-card: set_fmt error\n");
goto err;
}
}
if (set->sysclk) {
ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
if (ret && ret != -ENOTSUPP) {
dev_err(dai->dev, "simple-card: set_sysclk error\n");
goto err;
}
}
if (set->slots) {
ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
set->slots,
set->slot_width);
if (ret && ret != -ENOTSUPP) {
dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
goto err;
}
}
ret = 0;
err:
return ret;
}
static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct simple_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 simple_dai_props *dai_props;
int num, ret;
num = rtd - rtd->card->rtd;
dai_props = &priv->dai_props[num];
ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
if (ret < 0)
return ret;
ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
if (ret < 0)
return ret;
if (gpio_is_valid(priv->gpio_hp_det)) {
snd_soc_jack_new(codec->codec, "Headphones", SND_JACK_HEADPHONE,
&simple_card_hp_jack);
snd_soc_jack_add_pins(&simple_card_hp_jack,
ARRAY_SIZE(simple_card_hp_jack_pins),
simple_card_hp_jack_pins);
simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
&simple_card_hp_jack_gpio);
}
if (gpio_is_valid(priv->gpio_mic_det)) {
snd_soc_jack_new(codec->codec, "Mic Jack", SND_JACK_MICROPHONE,
&simple_card_mic_jack);
snd_soc_jack_add_pins(&simple_card_mic_jack,
ARRAY_SIZE(simple_card_mic_jack_pins),
simple_card_mic_jack_pins);
simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
&simple_card_mic_jack_gpio);
}
return 0;
}
static int
asoc_simple_card_sub_parse_of(struct device_node *np,
struct asoc_simple_dai *dai,
struct device_node **p_node,
const char **name,
int *args_count)
{
struct of_phandle_args args;
struct clk *clk;
u32 val;
int ret;
/*
* Get node via "sound-dai = <&phandle port>"
* it will be used as xxx_of_node on soc_bind_dai_link()
*/
ret = of_parse_phandle_with_args(np, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret)
return ret;
*p_node = args.np;
if (args_count)
*args_count = args.args_count;
/* Get dai->name */
ret = snd_soc_of_get_dai_name(np, name);
if (ret < 0)
return ret;
/* Parse TDM slot */
ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
if (ret)
return ret;
/*
* Parse dai->sysclk come from "clocks = <&xxx>"
* (if system has common clock)
* or "system-clock-frequency = <xxx>"
* or device's module clock.
*/
if (of_property_read_bool(np, "clocks")) {
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
return ret;
}
dai->sysclk = clk_get_rate(clk);
} else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
dai->sysclk = val;
} else {
clk = of_clk_get(args.np, 0);
if (!IS_ERR(clk))
dai->sysclk = clk_get_rate(clk);
}
return 0;
}
static int asoc_simple_card_dai_link_of(struct device_node *node,
struct simple_card_data *priv,
int idx,
bool is_top_level_node)
{
struct device *dev = simple_priv_to_dev(priv);
struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
struct device_node *np = NULL;
struct device_node *bitclkmaster = NULL;
struct device_node *framemaster = NULL;
unsigned int daifmt;
char *name;
char prop[128];
char *prefix = "";
int ret, cpu_args;
/* For single DAI link & old style of DT node */
if (is_top_level_node)
prefix = "simple-audio-card,";
daifmt = snd_soc_of_parse_daifmt(node, prefix,
&bitclkmaster, &framemaster);
daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
snprintf(prop, sizeof(prop), "%scpu", prefix);
np = of_get_child_by_name(node, prop);
if (!np) {
ret = -EINVAL;
dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
goto dai_link_of_err;
}
ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
&dai_link->cpu_of_node,
&dai_link->cpu_dai_name,
&cpu_args);
if (ret < 0)
goto dai_link_of_err;
dai_props->cpu_dai.fmt = daifmt;
switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
case 0x11:
dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
break;
case 0x10:
dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
break;
case 0x01:
dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
break;
default:
dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
break;
}
of_node_put(np);
snprintf(prop, sizeof(prop), "%scodec", prefix);
np = of_get_child_by_name(node, prop);
if (!np) {
ret = -EINVAL;
dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
goto dai_link_of_err;
}
ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
&dai_link->codec_of_node,
&dai_link->codec_dai_name, NULL);
if (ret < 0)
goto dai_link_of_err;
if (strlen(prefix) && !bitclkmaster && !framemaster) {
/*
* No DAI link level and master setting was found
* from sound node level, revert back to legacy DT
* parsing and take the settings from codec node.
*/
dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
__func__);
dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) |
(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
} else {
dai_props->codec_dai.fmt = daifmt;
switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
case 0x11:
dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
break;
case 0x10:
dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
break;
case 0x01:
dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
break;
default:
dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
break;
}
}
if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
ret = -EINVAL;
goto dai_link_of_err;
}
/* Simple Card assumes platform == cpu */
dai_link->platform_of_node = dai_link->cpu_of_node;
/* DAI link name is created from CPU/CODEC dai name */
name = devm_kzalloc(dev,
strlen(dai_link->cpu_dai_name) +
strlen(dai_link->codec_dai_name) + 2,
GFP_KERNEL);
sprintf(name, "%s-%s", dai_link->cpu_dai_name,
dai_link->codec_dai_name);
dai_link->name = dai_link->stream_name = name;
dai_link->ops = &asoc_simple_card_ops;
dai_link->init = asoc_simple_card_dai_init;
dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
dai_link->cpu_dai_name,
dai_props->cpu_dai.fmt,
dai_props->cpu_dai.sysclk);
dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
dai_link->codec_dai_name,
dai_props->codec_dai.fmt,
dai_props->codec_dai.sysclk);
/*
* In soc_bind_dai_link() will check cpu name after
* of_node matching if dai_link has cpu_dai_name.
* but, it will never match if name was created by
* fmt_single_name() remove cpu_dai_name if cpu_args
* was 0. See:
* fmt_single_name()
* fmt_multiple_name()
*/
if (!cpu_args)
dai_link->cpu_dai_name = NULL;
dai_link_of_err:
if (np)
of_node_put(np);
if (bitclkmaster)
of_node_put(bitclkmaster);
if (framemaster)
of_node_put(framemaster);
return ret;
}
static int asoc_simple_card_parse_of(struct device_node *node,
struct simple_card_data *priv)
{
struct device *dev = simple_priv_to_dev(priv);
u32 val;
int ret;
if (!node)
return -EINVAL;
/* Parse the card name from DT */
snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
/* The off-codec widgets */
if (of_property_read_bool(node, "simple-audio-card,widgets")) {
ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
"simple-audio-card,widgets");
if (ret)
return ret;
}
/* DAPM routes */
if (of_property_read_bool(node, "simple-audio-card,routing")) {
ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
"simple-audio-card,routing");
if (ret)
return ret;
}
/* Factor to mclk, used in hw_params() */
ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
if (ret == 0)
priv->mclk_fs = val;
dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
priv->snd_card.name : "");
/* Single/Muti DAI link(s) & New style of DT node */
if (of_get_child_by_name(node, "simple-audio-card,dai-link")) {
struct device_node *np = NULL;
int i = 0;
for_each_child_of_node(node, np) {
dev_dbg(dev, "\tlink %d:\n", i);
ret = asoc_simple_card_dai_link_of(np, priv,
i, false);
if (ret < 0) {
of_node_put(np);
return ret;
}
i++;
}
} else {
/* For single DAI link & old style of DT node */
ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
if (ret < 0)
return ret;
}
priv->gpio_hp_det = of_get_named_gpio(node,
"simple-audio-card,hp-det-gpio", 0);
if (priv->gpio_hp_det == -EPROBE_DEFER)
return -EPROBE_DEFER;
priv->gpio_mic_det = of_get_named_gpio(node,
"simple-audio-card,mic-det-gpio", 0);
if (priv->gpio_mic_det == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (!priv->snd_card.name)
priv->snd_card.name = priv->snd_card.dai_link->name;
return 0;
}
/* Decrease the reference count of the device nodes */
static int asoc_simple_card_unref(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct snd_soc_dai_link *dai_link;
struct device_node *np;
int num_links;
for (num_links = 0, dai_link = card->dai_link;
num_links < card->num_links;
num_links++, dai_link++) {
np = (struct device_node *) dai_link->cpu_of_node;
if (np)
of_node_put(np);
np = (struct device_node *) dai_link->codec_of_node;
if (np)
of_node_put(np);
}
return 0;
}
static int asoc_simple_card_probe(struct platform_device *pdev)
{
struct simple_card_data *priv;
struct snd_soc_dai_link *dai_link;
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
int num_links, ret;
/* Get the number of DAI links */
if (np && of_get_child_by_name(np, "simple-audio-card,dai-link"))
num_links = of_get_child_count(np);
else
num_links = 1;
/* Allocate the private data and the DAI link array */
priv = devm_kzalloc(dev,
sizeof(*priv) + sizeof(*dai_link) * num_links,
GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* Init snd_soc_card */
priv->snd_card.owner = THIS_MODULE;
priv->snd_card.dev = dev;
dai_link = priv->dai_link;
priv->snd_card.dai_link = dai_link;
priv->snd_card.num_links = num_links;
priv->gpio_hp_det = -ENOENT;
priv->gpio_mic_det = -ENOENT;
/* Get room for the other properties */
priv->dai_props = devm_kzalloc(dev,
sizeof(*priv->dai_props) * num_links,
GFP_KERNEL);
if (!priv->dai_props)
return -ENOMEM;
if (np && of_device_is_available(np)) {
ret = asoc_simple_card_parse_of(np, priv);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "parse error %d\n", ret);
goto err;
}
} else {
struct asoc_simple_card_info *cinfo;
cinfo = dev->platform_data;
if (!cinfo) {
dev_err(dev, "no info for asoc-simple-card\n");
return -EINVAL;
}
if (!cinfo->name ||
!cinfo->codec_dai.name ||
!cinfo->codec ||
!cinfo->platform ||
!cinfo->cpu_dai.name) {
dev_err(dev, "insufficient asoc_simple_card_info settings\n");
return -EINVAL;
}
priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
dai_link->name = cinfo->name;
dai_link->stream_name = cinfo->name;
dai_link->platform_name = cinfo->platform;
dai_link->codec_name = cinfo->codec;
dai_link->cpu_dai_name = cinfo->cpu_dai.name;
dai_link->codec_dai_name = cinfo->codec_dai.name;
dai_link->init = asoc_simple_card_dai_init;
memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
sizeof(priv->dai_props->cpu_dai));
memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
sizeof(priv->dai_props->codec_dai));
priv->dai_props->cpu_dai.fmt |= cinfo->daifmt;
priv->dai_props->codec_dai.fmt |= cinfo->daifmt;
}
snd_soc_card_set_drvdata(&priv->snd_card, priv);
ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
if (ret >= 0)
return ret;
err:
asoc_simple_card_unref(pdev);
return ret;
}
static int asoc_simple_card_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
if (gpio_is_valid(priv->gpio_hp_det))
snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
&simple_card_hp_jack_gpio);
if (gpio_is_valid(priv->gpio_mic_det))
snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
&simple_card_mic_jack_gpio);
return asoc_simple_card_unref(pdev);
}
static const struct of_device_id asoc_simple_of_match[] = {
{ .compatible = "simple-audio-card", },
{},
};
MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
static struct platform_driver asoc_simple_card = {
.driver = {
.name = "asoc-simple-card",
.owner = THIS_MODULE,
.of_match_table = asoc_simple_of_match,
},
.probe = asoc_simple_card_probe,
.remove = asoc_simple_card_remove,
};
module_platform_driver(asoc_simple_card);
MODULE_ALIAS("platform:asoc-simple-card");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ASoC Simple Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");