/*
 *      TURBOchannel driver services.
 *
 *      Copyright (c) 2005  James Simmons
 *      Copyright (c) 2006  Maciej W. Rozycki
 *
 *      Loosely based on drivers/dio/dio-driver.c and
 *      drivers/pci/pci-driver.c.
 *
 *      This file is subject to the terms and conditions of the GNU
 *      General Public License.  See the file "COPYING" in the main
 *      directory of this archive for more details.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/tc.h>

/**
 * tc_register_driver - register a new TC driver
 * @drv: the driver structure to register
 *
 * Adds the driver structure to the list of registered drivers
 * Returns a negative value on error, otherwise 0.
 * If no error occurred, the driver remains registered even if
 * no device was claimed during registration.
 */
int tc_register_driver(struct tc_driver *tdrv)
{
        return driver_register(&tdrv->driver);
}
EXPORT_SYMBOL(tc_register_driver);

/**
 * tc_unregister_driver - unregister a TC driver
 * @drv: the driver structure to unregister
 *
 * Deletes the driver structure from the list of registered TC drivers,
 * gives it a chance to clean up by calling its remove() function for
 * each device it was responsible for, and marks those devices as
 * driverless.
 */
void tc_unregister_driver(struct tc_driver *tdrv)
{
        driver_unregister(&tdrv->driver);
}
EXPORT_SYMBOL(tc_unregister_driver);

/**
 * tc_match_device - tell if a TC device structure has a matching
 *                   TC device ID structure
 * @tdrv: the TC driver to earch for matching TC device ID strings
 * @tdev: the TC device structure to match against
 *
 * Used by a driver to check whether a TC device present in the
 * system is in its list of supported devices.  Returns the matching
 * tc_device_id structure or %NULL if there is no match.
 */
static const struct tc_device_id *tc_match_device(const struct tc_driver *tdrv,
                                                  struct tc_dev *tdev)
{
        const struct tc_device_id *id = tdrv->id_table;

        if (id) {
                while (id->name[0] || id->vendor[0]) {
                        if (strcmp(tdev->name, id->name) == 0 &&
                            strcmp(tdev->vendor, id->vendor) == 0)
                                return id;
                        id++;
                }
        }
        return NULL;
}

/**
 * tc_bus_match - Tell if a device structure has a matching
 *                TC device ID structure
 * @dev: the device structure to match against
 * @drv: the device driver to search for matching TC device ID strings
 *
 * Used by a driver to check whether a TC device present in the
 * system is in its list of supported devices.  Returns 1 if there
 * is a match or 0 otherwise.
 */
static int tc_bus_match(struct device *dev, const struct device_driver *drv)
{
        struct tc_dev *tdev = to_tc_dev(dev);
        const struct tc_driver *tdrv = to_tc_driver(drv);
        const struct tc_device_id *id;

        id = tc_match_device(tdrv, tdev);
        if (id)
                return 1;

        return 0;
}

const struct bus_type tc_bus_type = {
        .name   = "tc",
        .match  = tc_bus_match,
};
EXPORT_SYMBOL(tc_bus_type);

static int __init tc_driver_init(void)
{
        return bus_register(&tc_bus_type);
}

postcore_initcall(tc_driver_init);