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// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
//
// Authors: Cezary Rojewski <cezary.rojewski@intel.com>
// Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
//
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
#include <sound/soc-dapm.h>
static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
struct snd_soc_dai_link **dai_link)
{
struct snd_soc_dai_link_component *platform;
struct snd_soc_dai_link *dl;
dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
if (!dl || !platform)
return -ENOMEM;
platform->name = platform_name;
dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
if (!dl->name || !dl->cpus || !dl->codecs)
return -ENOMEM;
dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port);
dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "snd-soc-dummy");
dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, "snd-soc-dummy-dai");
if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
return -ENOMEM;
dl->num_cpus = 1;
dl->num_codecs = 1;
dl->platforms = platform;
dl->num_platforms = 1;
dl->id = 0;
dl->nonatomic = 1;
dl->no_pcm = 1;
dl->dpcm_capture = 1;
dl->dpcm_playback = 1;
*dai_link = dl;
return 0;
}
static int avs_create_dapm_routes(struct device *dev, int ssp_port,
struct snd_soc_dapm_route **routes, int *num_routes)
{
struct snd_soc_dapm_route *dr;
const int num_dr = 2;
dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
dr[0].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port);
dr[0].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port);
if (!dr[0].sink || !dr[0].source)
return -ENOMEM;
dr[1].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Rx", ssp_port);
dr[1].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port);
if (!dr[1].sink || !dr[1].source)
return -ENOMEM;
*routes = dr;
*num_routes = num_dr;
return 0;
}
static int avs_create_dapm_widgets(struct device *dev, int ssp_port,
struct snd_soc_dapm_widget **widgets, int *num_widgets)
{
struct snd_soc_dapm_widget *dw;
const int num_dw = 2;
dw = devm_kcalloc(dev, num_dw, sizeof(*dw), GFP_KERNEL);
if (!dw)
return -ENOMEM;
dw[0].id = snd_soc_dapm_hp;
dw[0].reg = SND_SOC_NOPM;
dw[0].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dpb", ssp_port);
if (!dw[0].name)
return -ENOMEM;
dw[1].id = snd_soc_dapm_mic;
dw[1].reg = SND_SOC_NOPM;
dw[1].name = devm_kasprintf(dev, GFP_KERNEL, "ssp%dcp", ssp_port);
if (!dw[1].name)
return -ENOMEM;
*widgets = dw;
*num_widgets = num_dw;
return 0;
}
static int avs_i2s_test_probe(struct platform_device *pdev)
{
struct snd_soc_dapm_widget *widgets;
struct snd_soc_dapm_route *routes;
struct snd_soc_dai_link *dai_link;
struct snd_soc_acpi_mach *mach;
struct snd_soc_card *card;
struct device *dev = &pdev->dev;
const char *pname;
int num_routes, num_widgets;
int ssp_port, ret;
mach = dev_get_platdata(dev);
pname = mach->mach_params.platform;
ssp_port = __ffs(mach->mach_params.i2s_link_mask);
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->name = devm_kasprintf(dev, GFP_KERNEL, "ssp%d-loopback", ssp_port);
if (!card->name)
return -ENOMEM;
ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
if (ret) {
dev_err(dev, "Failed to create dai link: %d\n", ret);
return ret;
}
ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes);
if (ret) {
dev_err(dev, "Failed to create dapm routes: %d\n", ret);
return ret;
}
ret = avs_create_dapm_widgets(dev, ssp_port, &widgets, &num_widgets);
if (ret) {
dev_err(dev, "Failed to create dapm widgets: %d\n", ret);
return ret;
}
card->dev = dev;
card->owner = THIS_MODULE;
card->dai_link = dai_link;
card->num_links = 1;
card->dapm_routes = routes;
card->num_dapm_routes = num_routes;
card->dapm_widgets = widgets;
card->num_dapm_widgets = num_widgets;
card->fully_routed = true;
ret = snd_soc_fixup_dai_links_platform_name(card, pname);
if (ret)
return ret;
return devm_snd_soc_register_card(dev, card);
}
static struct platform_driver avs_i2s_test_driver = {
.probe = avs_i2s_test_probe,
.driver = {
.name = "avs_i2s_test",
.pm = &snd_soc_pm_ops,
},
};
module_platform_driver(avs_i2s_test_driver);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:avs_i2s_test");
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