// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr>
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <sound/ac97/codec.h>
#include <sound/ac97/compat.h>
#include <sound/ac97/controller.h>
#include <sound/soc.h>

#include "ac97_core.h"

static void compat_ac97_release(struct device *dev)
{
        kfree(to_ac97_t(dev));
}

static void compat_ac97_reset(struct snd_ac97 *ac97)
{
        struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
        struct ac97_controller *actrl = adev->ac97_ctrl;

        if (actrl->ops->reset)
                actrl->ops->reset(actrl);
}

static void compat_ac97_warm_reset(struct snd_ac97 *ac97)
{
        struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
        struct ac97_controller *actrl = adev->ac97_ctrl;

        if (actrl->ops->warm_reset)
                actrl->ops->warm_reset(actrl);
}

static void compat_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
                              unsigned short val)
{
        struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
        struct ac97_controller *actrl = adev->ac97_ctrl;

        actrl->ops->write(actrl, ac97->num, reg, val);
}

static unsigned short compat_ac97_read(struct snd_ac97 *ac97,
                                       unsigned short reg)
{
        struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
        struct ac97_controller *actrl = adev->ac97_ctrl;

        return actrl->ops->read(actrl, ac97->num, reg);
}

static const struct snd_ac97_bus_ops compat_snd_ac97_bus_ops = {
        .reset = compat_ac97_reset,
        .warm_reset = compat_ac97_warm_reset,
        .write = compat_ac97_write,
        .read = compat_ac97_read,
};

static struct snd_ac97_bus compat_soc_ac97_bus = {
        .ops = &compat_snd_ac97_bus_ops,
};

struct snd_ac97 *snd_ac97_compat_alloc(struct ac97_codec_device *adev)
{
        struct snd_ac97 *ac97;
        int ret;

        ac97 = kzalloc_obj(struct snd_ac97);
        if (ac97 == NULL)
                return ERR_PTR(-ENOMEM);

        ac97->private_data = adev;
        ac97->bus = &compat_soc_ac97_bus;

        ac97->dev.parent = &adev->dev;
        ac97->dev.release = compat_ac97_release;
        dev_set_name(&ac97->dev, "%s-compat", dev_name(&adev->dev));
        ret = device_register(&ac97->dev);
        if (ret) {
                put_device(&ac97->dev);
                return ERR_PTR(ret);
        }

        return ac97;
}
EXPORT_SYMBOL_GPL(snd_ac97_compat_alloc);

void snd_ac97_compat_release(struct snd_ac97 *ac97)
{
        device_unregister(&ac97->dev);
}
EXPORT_SYMBOL_GPL(snd_ac97_compat_release);

int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id,
        unsigned int id_mask)
{
        struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
        struct ac97_controller *actrl = adev->ac97_ctrl;
        unsigned int scanned;

        if (try_warm) {
                compat_ac97_warm_reset(ac97);
                scanned = snd_ac97_bus_scan_one(actrl, adev->num);
                if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
                        return 1;
        }

        compat_ac97_reset(ac97);
        compat_ac97_warm_reset(ac97);
        scanned = snd_ac97_bus_scan_one(actrl, adev->num);
        if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
                return 0;

        return -ENODEV;
}
EXPORT_SYMBOL_GPL(snd_ac97_reset);