// SPDX-License-Identifier: GPL-2.0
//
// ASoC simple sound card support
//
// Copyright (C) 2012 Renesas Solutions Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

#include <linux/cleanup.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>

#define DPCM_SELECTABLE 1

#define DAI     "sound-dai"
#define CELL    "#sound-dai-cells"
#define PREFIX  "simple-audio-card,"

static const struct snd_soc_ops simple_ops = {
        .startup        = simple_util_startup,
        .shutdown       = simple_util_shutdown,
        .hw_params      = simple_util_hw_params,
};

#define simple_ret(priv, ret) _simple_ret(priv, __func__, ret)
static inline int _simple_ret(struct simple_util_priv *priv,
                              const char *func, int ret)
{
        return snd_soc_ret(simple_priv_to_dev(priv), ret, "at %s()\n", func);
}

static int simple_parse_platform(struct simple_util_priv *priv,
                                 struct device_node *node,
                                 struct snd_soc_dai_link_component *dlc)
{
        struct of_phandle_args args;
        int ret;

        if (!node)
                return 0;

        /*
         * 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(node, DAI, CELL, 0, &args);
        if (ret)
                return simple_ret(priv, ret);

        /* dai_name is not required and may not exist for plat component */

        dlc->of_node = args.np;

        return 0;
}

static int simple_parse_dai(struct simple_util_priv *priv,
                            struct device_node *node,
                            struct snd_soc_dai_link_component *dlc,
                            int *is_single_link)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct of_phandle_args args;
        struct snd_soc_dai *dai;
        int ret;

        if (!node)
                return 0;

        /*
         * 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(node, DAI, CELL, 0, &args);
        if (ret)
                goto end;

        /*
         * Try to find from DAI args
         */
        dai = snd_soc_get_dai_via_args(&args);
        if (dai) {
                ret = -ENOMEM;
                dlc->dai_name = snd_soc_dai_name_get(dai);
                dlc->dai_args = snd_soc_copy_dai_args(dev, &args);
                if (!dlc->dai_args)
                        goto end;

                goto parse_dai_end;
        }

        /*
         * FIXME
         *
         * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
         * If user unbinded CPU or Codec driver, but not for Sound Card,
         * dlc->dai_name is keeping unbinded CPU or Codec
         * driver's pointer.
         *
         * If user re-bind CPU or Codec driver again, ALSA SoC will try
         * to rebind Card via snd_soc_try_rebind_card(), but because of
         * above reason, it might can't bind Sound Card.
         * Because Sound Card is pointing to released dai_name pointer.
         *
         * To avoid this rebind Card issue,
         * 1) It needs to alloc memory to keep dai_name eventhough
         *    CPU or Codec driver was unbinded, or
         * 2) user need to rebind Sound Card everytime
         *    if he unbinded CPU or Codec.
         */
        ret = snd_soc_get_dlc(&args, dlc);
        if (ret < 0)
                goto end;

parse_dai_end:
        if (is_single_link)
                *is_single_link = !args.args_count;
        ret = 0;
end:
        return simple_ret(priv, ret);
}

static void simple_parse_convert(struct device *dev,
                                 struct device_node *np,
                                 struct simple_util_data *adata)
{
        struct device_node *top = dev->of_node;
        struct device_node *node __free(device_node) = of_get_parent(np);

        simple_util_parse_convert(top,  PREFIX, adata);
        simple_util_parse_convert(node, PREFIX, adata);
        simple_util_parse_convert(node, NULL,   adata);
        simple_util_parse_convert(np,   NULL,   adata);
}

static int simple_parse_node(struct simple_util_priv *priv,
                             struct device_node *np,
                             struct link_info *li,
                             char *prefix,
                             int *cpu)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
        struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
        struct snd_soc_dai_link_component *dlc;
        struct simple_util_dai *dai;
        int ret;

        if (cpu) {
                dlc = snd_soc_link_to_cpu(dai_link, 0);
                dai = simple_props_to_dai_cpu(dai_props, 0);
        } else {
                dlc = snd_soc_link_to_codec(dai_link, 0);
                dai = simple_props_to_dai_codec(dai_props, 0);
        }

        ret = simple_parse_dai(priv, np, dlc, cpu);
        if (ret)
                goto end;

        ret = simple_util_parse_clk(dev, np, dai, dlc);
        if (ret)
                goto end;

        ret = simple_util_parse_tdm(np, dai);
end:
        return simple_ret(priv, ret);
}

static int simple_link_init(struct simple_util_priv *priv,
                            struct device_node *cpu,
                            struct device_node *codec,
                            struct link_info *li,
                            char *prefix, char *name)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct device_node *top = dev->of_node;
        struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
        struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
        struct device_node *node __free(device_node) = of_get_parent(cpu);
        enum snd_soc_trigger_order trigger_start = SND_SOC_TRIGGER_ORDER_DEFAULT;
        enum snd_soc_trigger_order trigger_stop  = SND_SOC_TRIGGER_ORDER_DEFAULT;
        bool playback_only = 0, capture_only = 0;
        int ret;

        ret = simple_util_parse_daifmt(dev, node, codec,
                                       prefix, &dai_link->dai_fmt);
        if (ret < 0)
                goto end;

        graph_util_parse_link_direction(top,    &playback_only, &capture_only);
        graph_util_parse_link_direction(node,   &playback_only, &capture_only);
        graph_util_parse_link_direction(cpu,    &playback_only, &capture_only);
        graph_util_parse_link_direction(codec,  &playback_only, &capture_only);

        of_property_read_u32(top,               "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(top,       PREFIX  "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(node,              "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(node,      PREFIX  "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(cpu,               "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(cpu,       PREFIX  "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(codec,             "mclk-fs", &dai_props->mclk_fs);
        of_property_read_u32(codec,     PREFIX  "mclk-fs", &dai_props->mclk_fs);

        graph_util_parse_trigger_order(priv, top,       &trigger_start, &trigger_stop);
        graph_util_parse_trigger_order(priv, node,      &trigger_start, &trigger_stop);
        graph_util_parse_trigger_order(priv, cpu,       &trigger_start, &trigger_stop);
        graph_util_parse_trigger_order(priv, codec,     &trigger_start, &trigger_stop);

        dai_link->playback_only         = playback_only;
        dai_link->capture_only          = capture_only;

        dai_link->trigger_start         = trigger_start;
        dai_link->trigger_stop          = trigger_stop;

        dai_link->init                  = simple_util_dai_init;
        dai_link->ops                   = &simple_ops;

        ret = simple_util_set_dailink_name(priv, dai_link, name);
end:
        return simple_ret(priv, ret);
}

static int simple_dai_link_of_dpcm(struct simple_util_priv *priv,
                                   struct device_node *np,
                                   struct device_node *codec,
                                   struct link_info *li,
                                   bool is_top)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
        struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
        struct device_node *top = dev->of_node;
        struct device_node *node __free(device_node) = of_get_parent(np);
        char *prefix = "";
        char dai_name[64];
        int ret;

        dev_dbg(dev, "link_of DPCM (%pOF)\n", np);

        /* For single DAI link & old style of DT node */
        if (is_top)
                prefix = PREFIX;

        if (li->cpu) {
                struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0);
                struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
                int is_single_links = 0;

                /* Codec is dummy */

                /* FE settings */
                dai_link->dynamic               = 1;
                dai_link->dpcm_merged_format    = 1;

                ret = simple_parse_node(priv, np, li, prefix, &is_single_links);
                if (ret < 0)
                        goto out_put_node;

                snprintf(dai_name, sizeof(dai_name), "fe.%s", cpus->dai_name);

                simple_util_canonicalize_cpu(cpus, is_single_links);
                simple_util_canonicalize_platform(platforms, cpus);
        } else {
                struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
                struct snd_soc_codec_conf *cconf;

                /* CPU is dummy */

                /* BE settings */
                dai_link->no_pcm                = 1;
                dai_link->be_hw_params_fixup    = simple_util_be_hw_params_fixup;

                cconf   = simple_props_to_codec_conf(dai_props, 0);

                ret = simple_parse_node(priv, np, li, prefix, NULL);
                if (ret < 0)
                        goto out_put_node;

                snprintf(dai_name, sizeof(dai_name), "be.%s", codecs->dai_name);

                /* check "prefix" from top node */
                snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
                                              PREFIX "prefix");
                snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
                                             "prefix");
                snd_soc_of_parse_node_prefix(np, cconf, codecs->of_node,
                                             "prefix");
        }

        simple_parse_convert(dev, np, &dai_props->adata);

        ret = simple_link_init(priv, np, codec, li, prefix, dai_name);

out_put_node:
        li->link++;

        return simple_ret(priv, ret);
}

static int simple_dai_link_of(struct simple_util_priv *priv,
                              struct device_node *np,
                              struct device_node *codec,
                              struct link_info *li,
                              bool is_top)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
        struct snd_soc_dai_link_component *cpus = snd_soc_link_to_cpu(dai_link, 0);
        struct snd_soc_dai_link_component *codecs = snd_soc_link_to_codec(dai_link, 0);
        struct snd_soc_dai_link_component *platforms = snd_soc_link_to_platform(dai_link, 0);
        struct device_node *cpu = NULL;
        char dai_name[64];
        char prop[128];
        char *prefix = "";
        int ret, single_cpu = 0;

        cpu  = np;
        struct device_node *node __free(device_node) = of_get_parent(np);

        dev_dbg(dev, "link_of (%pOF)\n", node);

        /* For single DAI link & old style of DT node */
        if (is_top)
                prefix = PREFIX;

        snprintf(prop, sizeof(prop), "%splat", prefix);
        struct device_node *plat __free(device_node)  = of_get_child_by_name(node, prop);

        ret = simple_parse_node(priv, cpu, li, prefix, &single_cpu);
        if (ret < 0)
                goto dai_link_of_err;

        ret = simple_parse_node(priv, codec, li, prefix, NULL);
        if (ret < 0)
                goto dai_link_of_err;

        ret = simple_parse_platform(priv, plat, platforms);
        if (ret < 0)
                goto dai_link_of_err;

        snprintf(dai_name, sizeof(dai_name),
                 "%s-%s", cpus->dai_name, codecs->dai_name);

        simple_util_canonicalize_cpu(cpus, single_cpu);
        simple_util_canonicalize_platform(platforms, cpus);

        ret = simple_link_init(priv, cpu, codec, li, prefix, dai_name);

dai_link_of_err:
        li->link++;

        return simple_ret(priv, ret);
}

static int __simple_for_each_link(struct simple_util_priv *priv,
                        struct link_info *li,
                        int (*func_noml)(struct simple_util_priv *priv,
                                         struct device_node *np,
                                         struct device_node *codec,
                                         struct link_info *li, bool is_top),
                        int (*func_dpcm)(struct simple_util_priv *priv,
                                         struct device_node *np,
                                         struct device_node *codec,
                                         struct link_info *li, bool is_top))
{
        struct device *dev = simple_priv_to_dev(priv);
        struct device_node *top = dev->of_node;
        struct device_node *node;
        uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
        bool is_top = 0;
        int ret = 0;

        /* Check if it has dai-link */
        node = of_get_child_by_name(top, PREFIX "dai-link");
        if (!node) {
                node = of_node_get(top);
                is_top = 1;
        }

        struct device_node *add_devs __free(device_node) = of_get_child_by_name(top, PREFIX "additional-devs");

        /* loop for all dai-link */
        do {
                struct simple_util_data adata;
                int num = of_get_child_count(node);

                /* Skip additional-devs node */
                if (node == add_devs) {
                        node = of_get_next_child(top, node);
                        continue;
                }

                /* get codec */
                struct device_node *codec __free(device_node) =
                        of_get_child_by_name(node, is_top ? PREFIX "codec" : "codec");
                if (!codec) {
                        ret = -ENODEV;
                        goto error;
                }
                /* get platform */
                struct device_node *plat __free(device_node) =
                        of_get_child_by_name(node, is_top ? PREFIX "plat" : "plat");

                /* get convert-xxx property */
                memset(&adata, 0, sizeof(adata));
                for_each_child_of_node_scoped(node, np) {
                        if (np == add_devs)
                                continue;
                        simple_parse_convert(dev, np, &adata);
                }

                /* loop for all CPU/Codec node */
                for_each_child_of_node_scoped(node, np) {
                        if (plat == np || add_devs == np)
                                continue;
                        /*
                         * It is DPCM
                         * if it has many CPUs,
                         * or has convert-xxx property
                         */
                        if (dpcm_selectable &&
                            (num > 2 || simple_util_is_convert_required(&adata))) {
                                /*
                                 * np
                                 *       |1(CPU)|0(Codec)  li->cpu
                                 * CPU   |Pass  |return
                                 * Codec |return|Pass
                                 */
                                if (li->cpu != (np == codec))
                                        ret = func_dpcm(priv, np, codec, li, is_top);
                        /* else normal sound */
                        } else {
                                /*
                                 * np
                                 *       |1(CPU)|0(Codec)  li->cpu
                                 * CPU   |Pass  |return
                                 * Codec |return|return
                                 */
                                if (li->cpu && (np != codec))
                                        ret = func_noml(priv, np, codec, li, is_top);
                        }

                        if (ret < 0)
                                goto error;
                }

                node = of_get_next_child(top, node);
        } while (!is_top && node);

error:
        of_node_put(node);

        return simple_ret(priv, ret);
}

static int simple_for_each_link(struct simple_util_priv *priv,
                                struct link_info *li,
                                int (*func_noml)(struct simple_util_priv *priv,
                                                 struct device_node *np,
                                                 struct device_node *codec,
                                                 struct link_info *li, bool is_top),
                                int (*func_dpcm)(struct simple_util_priv *priv,
                                                 struct device_node *np,
                                                 struct device_node *codec,
                                                 struct link_info *li, bool is_top))
{
        int ret;
        /*
         * Detect all CPU first, and Detect all Codec 2nd.
         *
         * In Normal sound case, all DAIs are detected
         * as "CPU-Codec".
         *
         * In DPCM sound case,
         * all CPUs   are detected as "CPU-dummy", and
         * all Codecs are detected as "dummy-Codec".
         * To avoid random sub-device numbering,
         * detect "dummy-Codec" in last;
         */
        for (li->cpu = 1; li->cpu >= 0; li->cpu--) {
                ret = __simple_for_each_link(priv, li, func_noml, func_dpcm);
                if (ret < 0)
                        break;
        }

        return simple_ret(priv, ret);
}

static void simple_depopulate_aux(void *data)
{
        struct simple_util_priv *priv = data;

        of_platform_depopulate(simple_priv_to_dev(priv));
}

static int simple_populate_aux(struct simple_util_priv *priv)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct device_node *node __free(device_node) = of_get_child_by_name(dev->of_node, PREFIX "additional-devs");
        int ret;

        if (!node)
                return 0;

        ret = of_platform_populate(node, NULL, NULL, dev);
        if (ret)
                goto end;

        ret = devm_add_action_or_reset(dev, simple_depopulate_aux, priv);
end:
        return simple_ret(priv, ret);
}

static int simple_parse_of(struct simple_util_priv *priv, struct link_info *li)
{
        struct snd_soc_card *card = simple_priv_to_card(priv);
        int ret;

        ret = simple_util_parse_widgets(card, PREFIX);
        if (ret < 0)
                goto end;

        ret = simple_util_parse_routing(card, PREFIX);
        if (ret < 0)
                goto end;

        ret = simple_util_parse_pin_switches(card, PREFIX);
        if (ret < 0)
                goto end;

        /* Single/Muti DAI link(s) & New style of DT node */
        memset(li, 0, sizeof(*li));
        ret = simple_for_each_link(priv, li,
                                   simple_dai_link_of,
                                   simple_dai_link_of_dpcm);
        if (ret < 0)
                goto end;

        ret = simple_util_parse_card_name(priv, PREFIX);
        if (ret < 0)
                goto end;

        ret = simple_populate_aux(priv);
        if (ret < 0)
                goto end;

        ret = snd_soc_of_parse_aux_devs(card, PREFIX "aux-devs");
end:
        return simple_ret(priv, ret);
}

static int simple_count_noml(struct simple_util_priv *priv,
                             struct device_node *np,
                             struct device_node *codec,
                             struct link_info *li, bool is_top)
{
        int ret = -EINVAL;

        if (li->link >= SNDRV_MAX_LINKS)
                goto end;

        /*
         * DON'T REMOVE platforms
         *
         * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform
         * are different Component, but are sharing same component->dev.
         * Simple Card had been supported it without special Platform selection.
         * We need platforms here.
         *
         * In case of no Platform, it will be Platform == CPU, but Platform will be
         * ignored by snd_soc_rtd_add_component().
         *
         * see
         *      simple-card-utils.c :: simple_util_canonicalize_platform()
         */
        li->num[li->link].cpus          = 1;
        li->num[li->link].platforms     = 1;

        li->num[li->link].codecs        = 1;

        li->link += 1;
        ret = 0;
end:
        return simple_ret(priv, ret);
}

static int simple_count_dpcm(struct simple_util_priv *priv,
                             struct device_node *np,
                             struct device_node *codec,
                             struct link_info *li, bool is_top)
{
        int ret = -EINVAL;

        if (li->link >= SNDRV_MAX_LINKS)
                goto end;

        if (li->cpu) {
                /*
                 * DON'T REMOVE platforms
                 * see
                 *      simple_count_noml()
                 */
                li->num[li->link].cpus          = 1;
                li->num[li->link].platforms     = 1;

                li->link++; /* CPU-dummy */
        } else {
                li->num[li->link].codecs        = 1;

                li->link++; /* dummy-Codec */
        }
        ret = 0;
end:
        return simple_ret(priv, ret);
}

static int simple_get_dais_count(struct simple_util_priv *priv,
                                 struct link_info *li)
{
        struct device *dev = simple_priv_to_dev(priv);
        struct device_node *top = dev->of_node;

        /*
         * link_num :   number of links.
         *              CPU-Codec / CPU-dummy / dummy-Codec
         * dais_num :   number of DAIs
         * ccnf_num :   number of codec_conf
         *              same number for "dummy-Codec"
         *
         * ex1)
         * CPU0 --- Codec0      link : 5
         * CPU1 --- Codec1      dais : 7
         * CPU2 -/              ccnf : 1
         * CPU3 --- Codec2
         *
         *      => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
         *      => 7 DAIs  = 4xCPU + 3xCodec
         *      => 1 ccnf  = 1xdummy-Codec
         *
         * ex2)
         * CPU0 --- Codec0      link : 5
         * CPU1 --- Codec1      dais : 6
         * CPU2 -/              ccnf : 1
         * CPU3 -/
         *
         *      => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
         *      => 6 DAIs  = 4xCPU + 2xCodec
         *      => 1 ccnf  = 1xdummy-Codec
         *
         * ex3)
         * CPU0 --- Codec0      link : 6
         * CPU1 -/              dais : 6
         * CPU2 --- Codec1      ccnf : 2
         * CPU3 -/
         *
         *      => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
         *      => 6 DAIs  = 4xCPU + 2xCodec
         *      => 2 ccnf  = 2xdummy-Codec
         *
         * ex4)
         * CPU0 --- Codec0 (convert-rate)       link : 3
         * CPU1 --- Codec1                      dais : 4
         *                                      ccnf : 1
         *
         *      => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
         *      => 4 DAIs  = 2xCPU + 2xCodec
         *      => 1 ccnf  = 1xdummy-Codec
         */
        if (!top) {
                li->num[0].cpus         = 1;
                li->num[0].codecs       = 1;
                li->num[0].platforms    = 1;

                li->link = 1;
                return 0;
        }

        return simple_for_each_link(priv, li,
                                    simple_count_noml,
                                    simple_count_dpcm);
}

static int simple_soc_probe(struct snd_soc_card *card)
{
        struct simple_util_priv *priv = snd_soc_card_get_drvdata(card);
        int ret;

        ret = simple_util_init_hp(card, &priv->hp_jack, PREFIX);
        if (ret < 0)
                goto end;

        ret = simple_util_init_mic(card, &priv->mic_jack, PREFIX);
        if (ret < 0)
                goto end;

        ret = simple_util_init_aux_jacks(priv, PREFIX);
end:
        return simple_ret(priv, ret);
}

static int simple_probe(struct platform_device *pdev)
{
        struct simple_util_priv *priv;
        struct device *dev = &pdev->dev;
        struct device_node *np = dev->of_node;
        struct snd_soc_card *card;
        int ret;

        /* Allocate the private data and the DAI link array */
        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        card = simple_priv_to_card(priv);
        card->owner             = THIS_MODULE;
        card->dev               = dev;
        card->probe             = simple_soc_probe;
        card->driver_name       = "simple-card";

        ret = -ENOMEM;
        struct link_info *li __free(kfree) = kzalloc_obj(*li);
        if (!li)
                goto end;

        ret = simple_get_dais_count(priv, li);
        if (ret < 0)
                goto end;

        ret = -EINVAL;
        if (!li->link)
                goto end;

        ret = simple_util_init_priv(priv, li);
        if (ret < 0)
                goto end;

        if (np && of_device_is_available(np)) {

                ret = simple_parse_of(priv, li);
                if (ret < 0) {
                        dev_err_probe(dev, ret, "parse error\n");
                        goto err;
                }

        } else {
                struct simple_util_info *cinfo;
                struct snd_soc_dai_link_component *cpus;
                struct snd_soc_dai_link_component *codecs;
                struct snd_soc_dai_link_component *platform;
                struct snd_soc_dai_link *dai_link = priv->dai_link;
                struct simple_dai_props *dai_props = priv->dai_props;

                ret = -EINVAL;

                cinfo = dev->platform_data;
                if (!cinfo) {
                        dev_err(dev, "no info for asoc-simple-card\n");
                        goto err;
                }

                if (!cinfo->name ||
                    !cinfo->codec_dai.name ||
                    !cinfo->codec ||
                    !cinfo->platform ||
                    !cinfo->cpu_dai.name) {
                        dev_err(dev, "insufficient simple_util_info settings\n");
                        goto err;
                }

                cpus                    = dai_link->cpus;
                cpus->dai_name          = cinfo->cpu_dai.name;

                codecs                  = dai_link->codecs;
                codecs->name            = cinfo->codec;
                codecs->dai_name        = cinfo->codec_dai.name;

                platform                = dai_link->platforms;
                platform->name          = cinfo->platform;

                card->name              = (cinfo->card) ? cinfo->card : cinfo->name;
                dai_link->name          = cinfo->name;
                dai_link->stream_name   = cinfo->name;
                dai_link->dai_fmt       = cinfo->daifmt;
                dai_link->init          = simple_util_dai_init;
                memcpy(dai_props->cpu_dai, &cinfo->cpu_dai,
                                        sizeof(*dai_props->cpu_dai));
                memcpy(dai_props->codec_dai, &cinfo->codec_dai,
                                        sizeof(*dai_props->codec_dai));
        }

        snd_soc_card_set_drvdata(card, priv);

        simple_util_debug_info(priv);

        ret = devm_snd_soc_register_card(dev, card);
        if (ret < 0)
                goto err;

        return 0;
err:
        simple_util_clean_reference(card);
end:
        return dev_err_probe(dev, ret, "parse error\n");
}

static const struct of_device_id simple_of_match[] = {
        { .compatible = "simple-audio-card", },
        { .compatible = "simple-scu-audio-card",
          .data = (void *)DPCM_SELECTABLE },
        {},
};
MODULE_DEVICE_TABLE(of, simple_of_match);

static struct platform_driver simple_card = {
        .driver = {
                .name = "asoc-simple-card",
                .pm = &snd_soc_pm_ops,
                .of_match_table = simple_of_match,
        },
        .probe = simple_probe,
        .remove = simple_util_remove,
};

module_platform_driver(simple_card);

MODULE_ALIAS("platform:asoc-simple-card");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Simple Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");