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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/soc/intel/avs/boards/i2s_test.c
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// SPDX-License-Identifier: GPL-2.0-only

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//

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// Copyright(c) 2021-2022 Intel Corporation

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//

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// Authors: Cezary Rojewski <[email protected]>

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//          Amadeusz Slawinski <[email protected]>

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//

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#include <linux/module.h>

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#include <sound/pcm.h>

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#include <sound/pcm_params.h>

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#include <sound/soc.h>

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#include <sound/soc-acpi.h>

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#include <sound/soc-dapm.h>

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#include "../utils.h"

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static int avs_create_dai_link(struct device *dev, int ssp_port, int tdm_slot,

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			       struct snd_soc_dai_link **dai_link)

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{

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	struct snd_soc_dai_link_component *platform;

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	struct snd_soc_dai_link *dl;

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	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);

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	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);

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	if (!dl || !platform)

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		return -ENOMEM;

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	dl->name = devm_kasprintf(dev, GFP_KERNEL,

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				  AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot));

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	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);

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	if (!dl->name || !dl->cpus)

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		return -ENOMEM;

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	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,

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					    AVS_STRING_FMT("SSP", " Pin", ssp_port, tdm_slot));

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	dl->codecs = &snd_soc_dummy_dlc;

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	if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)

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		return -ENOMEM;

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	platform->name = dev_name(dev);

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	dl->num_cpus = 1;

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	dl->num_codecs = 1;

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	dl->platforms = platform;

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	dl->num_platforms = 1;

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	dl->id = 0;

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	dl->nonatomic = 1;

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	dl->no_pcm = 1;

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	*dai_link = dl;

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	return 0;

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}

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static int avs_i2s_test_probe(struct platform_device *pdev)

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{

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	struct snd_soc_dai_link *dai_link;

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	struct snd_soc_acpi_mach *mach;

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	struct avs_mach_pdata *pdata;

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	struct snd_soc_card *card;

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	struct device *dev = &pdev->dev;

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	int ssp_port, tdm_slot, ret;

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	mach = dev_get_platdata(dev);

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	pdata = mach->pdata;

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	if (!avs_mach_singular_ssp(mach)) {

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		dev_err(dev, "Invalid SSP configuration\n");

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		return -EINVAL;

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	}

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	ssp_port = avs_mach_ssp_port(mach);

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	if (!avs_mach_singular_tdm(mach, ssp_port)) {

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		dev_err(dev, "Invalid TDM configuration\n");

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		return -EINVAL;

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	}

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	tdm_slot = avs_mach_ssp_tdm(mach, ssp_port);

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	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);

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	if (!card)

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		return -ENOMEM;

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	if (pdata->obsolete_card_names) {

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		card->name = devm_kasprintf(dev, GFP_KERNEL,

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					    AVS_STRING_FMT("ssp", "-loopback", ssp_port, tdm_slot));

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	} else {

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		card->driver_name = "avs_i2s_test";

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		card->long_name = card->name = devm_kasprintf(dev, GFP_KERNEL,

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							      AVS_STRING_FMT("AVS I2S TEST-", "",

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									     ssp_port, tdm_slot));

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	}

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	if (!card->name)

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		return -ENOMEM;

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	ret = avs_create_dai_link(dev, ssp_port, tdm_slot, &dai_link);

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	if (ret) {

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		dev_err(dev, "Failed to create dai link: %d\n", ret);

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		return ret;

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	}

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	card->dev = dev;

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	card->owner = THIS_MODULE;

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	card->dai_link = dai_link;

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	card->num_links = 1;

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	card->fully_routed = true;

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	return devm_snd_soc_register_deferrable_card(dev, card);

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}

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static const struct platform_device_id avs_i2s_test_driver_ids[] = {

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	{

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		.name = "avs_i2s_test",

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	},

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	{},

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};

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MODULE_DEVICE_TABLE(platform, avs_i2s_test_driver_ids);

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static struct platform_driver avs_i2s_test_driver = {

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	.probe = avs_i2s_test_probe,

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	.driver = {

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		.name = "avs_i2s_test",

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		.pm = &snd_soc_pm_ops,

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	},

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	.id_table = avs_i2s_test_driver_ids,

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};

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module_platform_driver(avs_i2s_test_driver);

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MODULE_DESCRIPTION("Intel i2s test machine driver");

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MODULE_LICENSE("GPL");

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