// SPDX-License-Identifier: GPL-2.0-only
/*
 * SPI bus interface to Cirrus Logic Madera codecs
 *
 * Copyright (C) 2015-2018 Cirrus Logic
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>

#include <linux/mfd/madera/core.h>

#include "madera.h"

static int madera_spi_probe(struct spi_device *spi)
{
        struct madera *madera;
        const struct regmap_config *regmap_16bit_config = NULL;
        const struct regmap_config *regmap_32bit_config = NULL;
        unsigned long type;
        const char *name;
        int ret;

        type = (unsigned long)spi_get_device_match_data(spi);
        switch (type) {
        case CS47L15:
                if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
                        regmap_16bit_config = &cs47l15_16bit_spi_regmap;
                        regmap_32bit_config = &cs47l15_32bit_spi_regmap;
                }
                break;
        case CS47L35:
                if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
                        regmap_16bit_config = &cs47l35_16bit_spi_regmap;
                        regmap_32bit_config = &cs47l35_32bit_spi_regmap;
                }
                break;
        case CS47L85:
        case WM1840:
                if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
                        regmap_16bit_config = &cs47l85_16bit_spi_regmap;
                        regmap_32bit_config = &cs47l85_32bit_spi_regmap;
                }
                break;
        case CS47L90:
        case CS47L91:
                if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
                        regmap_16bit_config = &cs47l90_16bit_spi_regmap;
                        regmap_32bit_config = &cs47l90_32bit_spi_regmap;
                }
                break;
        case CS42L92:
        case CS47L92:
        case CS47L93:
                if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
                        regmap_16bit_config = &cs47l92_16bit_spi_regmap;
                        regmap_32bit_config = &cs47l92_32bit_spi_regmap;
                }
                break;
        default:
                dev_err(&spi->dev,
                        "Unknown Madera SPI device type %ld\n", type);
                return -EINVAL;
        }

        name = madera_name_from_type(type);

        if (!regmap_16bit_config) {
                /* it's polite to say which codec isn't built into the kernel */
                dev_err(&spi->dev,
                        "Kernel does not include support for %s\n", name);
                return -EINVAL;
        }

        madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
        if (!madera)
                return -ENOMEM;

        madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
        if (IS_ERR(madera->regmap)) {
                ret = PTR_ERR(madera->regmap);
                dev_err(&spi->dev,
                        "Failed to allocate 16-bit register map: %d\n", ret);
                return ret;
        }

        madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
        if (IS_ERR(madera->regmap_32bit)) {
                ret = PTR_ERR(madera->regmap_32bit);
                dev_err(&spi->dev,
                        "Failed to allocate 32-bit register map: %d\n", ret);
                return ret;
        }

        madera->type = type;
        madera->type_name = name;
        madera->dev = &spi->dev;
        madera->irq = spi->irq;

        return madera_dev_init(madera);
}

static void madera_spi_remove(struct spi_device *spi)
{
        struct madera *madera = spi_get_drvdata(spi);

        madera_dev_exit(madera);
}

static const struct spi_device_id madera_spi_ids[] = {
        { "cs47l15", CS47L15 },
        { "cs47l35", CS47L35 },
        { "cs47l85", CS47L85 },
        { "cs47l90", CS47L90 },
        { "cs47l91", CS47L91 },
        { "cs42l92", CS42L92 },
        { "cs47l92", CS47L92 },
        { "cs47l93", CS47L93 },
        { "wm1840", WM1840 },
        { }
};
MODULE_DEVICE_TABLE(spi, madera_spi_ids);

static struct spi_driver madera_spi_driver = {
        .driver = {
                .name   = "madera",
                .pm     = &madera_pm_ops,
                .of_match_table = of_match_ptr(madera_of_match),
        },
        .probe          = madera_spi_probe,
        .remove         = madera_spi_remove,
        .id_table       = madera_spi_ids,
};

module_spi_driver(madera_spi_driver);

MODULE_DESCRIPTION("Madera SPI bus interface");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL v2");