// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018, Linaro Limited.
// Copyright (c) 2018, The Linux Foundation. All rights reserved.

#include <linux/module.h>
#include "common.h"

int qcom_snd_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;
        struct of_phandle_args args;
        struct snd_soc_dai_link_component *dlc;
        int ret, num_links;

        ret = snd_soc_of_parse_card_name(card, "model");
        if (ret == 0 && !card->name)
                /* Deprecated, only for compatibility with old device trees */
                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, "audio-routing")) {
                ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
                if (ret)
                        return ret;
        }
        /* Deprecated, only for compatibility with old device trees */
        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;
        }

        ret = snd_soc_of_parse_aux_devs(card, "aux-devs");
        if (ret)
                return ret;

        /* Populate links */
        num_links = of_get_child_count(dev->of_node);

        /* Allocate the DAI link array */
        card->dai_link = devm_kcalloc(dev, 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) {
                dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
                if (!dlc) {
                        ret = -ENOMEM;
                        goto err_put_np;
                }

                link->cpus      = &dlc[0];
                link->platforms = &dlc[1];

                link->num_cpus          = 1;
                link->num_platforms     = 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_put_np;
                }

                cpu = of_get_child_by_name(np, "cpu");
                platform = of_get_child_by_name(np, "platform");
                codec = of_get_child_by_name(np, "codec");

                if (!cpu) {
                        dev_err(dev, "%s: Can't find cpu DT node\n", link->name);
                        ret = -EINVAL;
                        goto err;
                }

                ret = of_parse_phandle_with_args(cpu, "sound-dai",
                                        "#sound-dai-cells", 0, &args);
                if (ret) {
                        dev_err(card->dev, "%s: error getting cpu phandle\n", link->name);
                        goto err;
                }
                link->cpus->of_node = args.np;
                link->id = args.args[0];

                ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
                if (ret) {
                        if (ret != -EPROBE_DEFER)
                                dev_err(card->dev, "%s: error getting cpu dai name: %d\n",
                                        link->name, ret);
                        goto err;
                }

                if (platform) {
                        link->platforms->of_node = of_parse_phandle(platform,
                                        "sound-dai",
                                        0);
                        if (!link->platforms->of_node) {
                                dev_err(card->dev, "%s: platform dai not found\n", link->name);
                                ret = -EINVAL;
                                goto err;
                        }
                } else {
                        link->platforms->of_node = link->cpus->of_node;
                }

                if (codec) {
                        ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
                        if (ret < 0) {
                                if (ret != -EPROBE_DEFER)
                                        dev_err(card->dev, "%s: codec dai not found: %d\n",
                                                link->name, ret);
                                goto err;
                        }

                        if (platform) {
                                /* DPCM backend */
                                link->no_pcm = 1;
                                link->ignore_pmdown_time = 1;
                        }
                } else {
                        /* DPCM frontend */
                        dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL);
                        if (!dlc) {
                                ret = -ENOMEM;
                                goto err;
                        }

                        link->codecs     = dlc;
                        link->num_codecs = 1;

                        link->codecs->dai_name = "snd-soc-dummy-dai";
                        link->codecs->name = "snd-soc-dummy";
                        link->dynamic = 1;
                }

                if (platform || !codec) {
                        /* DPCM */
                        snd_soc_dai_link_set_capabilities(link);
                        link->ignore_suspend = 1;
                        link->nonatomic = 1;
                }

                link->stream_name = link->name;
                link++;

                of_node_put(cpu);
                of_node_put(codec);
                of_node_put(platform);
        }

        return 0;
err:
        of_node_put(cpu);
        of_node_put(codec);
        of_node_put(platform);
err_put_np:
        of_node_put(np);
        return ret;
}
EXPORT_SYMBOL(qcom_snd_parse_of);

MODULE_LICENSE("GPL v2");