// SPDX-License-Identifier: GPL-2.0
//
// Register map access API - AC'97 support
//
// Copyright 2013 Linaro Ltd.  All rights reserved.

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#include <sound/ac97_codec.h>

bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case AC97_RESET:
        case AC97_POWERDOWN:
        case AC97_INT_PAGING:
        case AC97_EXTENDED_ID:
        case AC97_EXTENDED_STATUS:
        case AC97_EXTENDED_MID:
        case AC97_EXTENDED_MSTATUS:
        case AC97_GPIO_STATUS:
        case AC97_MISC_AFE:
        case AC97_VENDOR_ID1:
        case AC97_VENDOR_ID2:
        case AC97_CODEC_CLASS_REV:
        case AC97_PCI_SVID:
        case AC97_PCI_SID:
        case AC97_FUNC_SELECT:
        case AC97_FUNC_INFO:
        case AC97_SENSE_INFO:
                return true;
        default:
                return false;
        }
}
EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile);

static int regmap_ac97_reg_read(void *context, unsigned int reg,
        unsigned int *val)
{
        struct snd_ac97 *ac97 = context;

        *val = ac97->bus->ops->read(ac97, reg);

        return 0;
}

static int regmap_ac97_reg_write(void *context, unsigned int reg,
        unsigned int val)
{
        struct snd_ac97 *ac97 = context;

        ac97->bus->ops->write(ac97, reg, val);

        return 0;
}

static const struct regmap_bus ac97_regmap_bus = {
        .reg_write = regmap_ac97_reg_write,
        .reg_read = regmap_ac97_reg_read,
};

struct regmap *__regmap_init_ac97(struct snd_ac97 *ac97,
                                  const struct regmap_config *config,
                                  struct lock_class_key *lock_key,
                                  const char *lock_name)
{
        return __regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
                             lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__regmap_init_ac97);

struct regmap *__devm_regmap_init_ac97(struct snd_ac97 *ac97,
                                       const struct regmap_config *config,
                                       struct lock_class_key *lock_key,
                                       const char *lock_name)
{
        return __devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
                                  lock_key, lock_name);
}
EXPORT_SYMBOL_GPL(__devm_regmap_init_ac97);

MODULE_DESCRIPTION("Register map access API - AC'97 support");
MODULE_LICENSE("GPL v2");