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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018, Linaro Limited
#include <linux/soc/qcom/apr.h>
#include <linux/module.h>
#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
static int apq8096_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
struct snd_interval *rate = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
rate->min = rate->max = 48000;
channels->min = channels->max = 2;
return 0;
}
static int apq8096_sbc_parse_of(struct snd_soc_card *card)
{
struct device_node *np;
struct device_node *codec = NULL;
struct device_node *platform = NULL;
struct device_node *cpu = NULL;
struct device *dev = card->dev;
struct snd_soc_dai_link *link;
int ret, num_links;
ret = snd_soc_of_parse_card_name(card, "qcom,model");
if (ret) {
dev_err(dev, "Error parsing card name: %d\n", ret);
return ret;
}
/* DAPM routes */
if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
ret = snd_soc_of_parse_audio_routing(card,
"qcom,audio-routing");
if (ret)
return ret;
}
/* Populate links */
num_links = of_get_child_count(dev->of_node);
/* Allocate the DAI link array */
card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
if (!card->dai_link)
return -ENOMEM;
card->num_links = num_links;
link = card->dai_link;
for_each_child_of_node(dev->of_node, np) {
cpu = of_get_child_by_name(np, "cpu");
if (!cpu) {
dev_err(dev, "Can't find cpu DT node\n");
ret = -EINVAL;
goto err;
}
link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
if (!link->cpu_of_node) {
dev_err(card->dev, "error getting cpu phandle\n");
ret = -EINVAL;
goto err;
}
ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
if (ret) {
dev_err(card->dev, "error getting cpu dai name\n");
goto err;
}
platform = of_get_child_by_name(np, "platform");
codec = of_get_child_by_name(np, "codec");
if (codec && platform) {
link->platform_of_node = of_parse_phandle(platform,
"sound-dai",
0);
if (!link->platform_of_node) {
dev_err(card->dev, "platform dai not found\n");
ret = -EINVAL;
goto err;
}
ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
if (ret < 0) {
dev_err(card->dev, "codec dai not found\n");
goto err;
}
link->no_pcm = 1;
link->ignore_pmdown_time = 1;
link->be_hw_params_fixup = apq8096_be_hw_params_fixup;
} else {
link->platform_of_node = link->cpu_of_node;
link->codec_dai_name = "snd-soc-dummy-dai";
link->codec_name = "snd-soc-dummy";
link->dynamic = 1;
}
link->ignore_suspend = 1;
ret = of_property_read_string(np, "link-name", &link->name);
if (ret) {
dev_err(card->dev, "error getting codec dai_link name\n");
goto err;
}
link->dpcm_playback = 1;
link->dpcm_capture = 1;
link->stream_name = link->name;
link++;
}
return 0;
err:
of_node_put(cpu);
of_node_put(codec);
of_node_put(platform);
kfree(card->dai_link);
return ret;
}
static int apq8096_platform_probe(struct platform_device *pdev)
{
struct snd_soc_card *card;
struct device *dev = &pdev->dev;
int ret;
card = kzalloc(sizeof(*card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->dev = dev;
card->auto_bind = true;
dev_set_drvdata(dev, card);
ret = apq8096_sbc_parse_of(card);
if (ret) {
dev_err(dev, "Error parsing OF data\n");
goto err;
}
ret = snd_soc_register_card(card);
if (ret)
goto err;
return 0;
err:
kfree(card);
return ret;
}
static int apq8096_platform_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
card->auto_bind = false;
snd_soc_unregister_card(card);
kfree(card->dai_link);
kfree(card);
return 0;
}
static const struct of_device_id msm_snd_apq8096_dt_match[] = {
{.compatible = "qcom,apq8096-sndcard"},
{}
};
MODULE_DEVICE_TABLE(of, msm_snd_apq8096_dt_match);
static struct platform_driver msm_snd_apq8096_driver = {
.probe = apq8096_platform_probe,
.remove = apq8096_platform_remove,
.driver = {
.name = "msm-snd-apq8096",
.of_match_table = msm_snd_apq8096_dt_match,
},
};
module_platform_driver(msm_snd_apq8096_driver);
MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
MODULE_DESCRIPTION("APQ8096 ASoC Machine Driver");
MODULE_LICENSE("GPL v2");
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