// SPDX-License-Identifier: GPL-2.0
/*
 * SPI bridge PHY driver.
 *
 * Copyright 2014-2016 Google Inc.
 * Copyright 2014-2016 Linaro Ltd.
 */

#include <linux/module.h>
#include <linux/greybus.h>

#include "gbphy.h"
#include "spilib.h"

static struct spilib_ops *spilib_ops;

static int gb_spi_probe(struct gbphy_device *gbphy_dev,
                        const struct gbphy_device_id *id)
{
        struct gb_connection *connection;
        int ret;

        connection = gb_connection_create(gbphy_dev->bundle,
                                          le16_to_cpu(gbphy_dev->cport_desc->id),
                                          NULL);
        if (IS_ERR(connection))
                return PTR_ERR(connection);

        ret = gb_connection_enable(connection);
        if (ret)
                goto exit_connection_destroy;

        ret = gb_spilib_master_init(connection, &gbphy_dev->dev, spilib_ops);
        if (ret)
                goto exit_connection_disable;

        gb_gbphy_set_data(gbphy_dev, connection);

        gbphy_runtime_put_autosuspend(gbphy_dev);
        return 0;

exit_connection_disable:
        gb_connection_disable(connection);
exit_connection_destroy:
        gb_connection_destroy(connection);

        return ret;
}

static void gb_spi_remove(struct gbphy_device *gbphy_dev)
{
        struct gb_connection *connection = gb_gbphy_get_data(gbphy_dev);
        int ret;

        ret = gbphy_runtime_get_sync(gbphy_dev);
        if (ret)
                gbphy_runtime_get_noresume(gbphy_dev);

        gb_spilib_master_exit(connection);
        gb_connection_disable(connection);
        gb_connection_destroy(connection);
}

static const struct gbphy_device_id gb_spi_id_table[] = {
        { GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SPI) },
        { },
};
MODULE_DEVICE_TABLE(gbphy, gb_spi_id_table);

static struct gbphy_driver spi_driver = {
        .name           = "spi",
        .probe          = gb_spi_probe,
        .remove         = gb_spi_remove,
        .id_table       = gb_spi_id_table,
};

module_gbphy_driver(spi_driver);
MODULE_DESCRIPTION("Greybus SPI bridge PHY driver");
MODULE_LICENSE("GPL v2");