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/drivers/tc/tc-driver.c

http://github.com/mirrors/linux
C | 109 lines | 47 code | 11 blank | 51 comment | 7 complexity | 787e291d9e94ee73fa2de29d0bea93bc MD5 | raw file
  1/*
  2 *	TURBOchannel driver services.
  3 *
  4 *	Copyright (c) 2005  James Simmons
  5 *	Copyright (c) 2006  Maciej W. Rozycki
  6 *
  7 *	Loosely based on drivers/dio/dio-driver.c and
  8 *	drivers/pci/pci-driver.c.
  9 *
 10 *	This file is subject to the terms and conditions of the GNU
 11 *	General Public License.  See the file "COPYING" in the main
 12 *	directory of this archive for more details.
 13 */
 14
 15#include <linux/init.h>
 16#include <linux/module.h>
 17#include <linux/tc.h>
 18
 19/**
 20 * tc_register_driver - register a new TC driver
 21 * @drv: the driver structure to register
 22 *
 23 * Adds the driver structure to the list of registered drivers
 24 * Returns a negative value on error, otherwise 0.
 25 * If no error occurred, the driver remains registered even if
 26 * no device was claimed during registration.
 27 */
 28int tc_register_driver(struct tc_driver *tdrv)
 29{
 30	return driver_register(&tdrv->driver);
 31}
 32EXPORT_SYMBOL(tc_register_driver);
 33
 34/**
 35 * tc_unregister_driver - unregister a TC driver
 36 * @drv: the driver structure to unregister
 37 *
 38 * Deletes the driver structure from the list of registered TC drivers,
 39 * gives it a chance to clean up by calling its remove() function for
 40 * each device it was responsible for, and marks those devices as
 41 * driverless.
 42 */
 43void tc_unregister_driver(struct tc_driver *tdrv)
 44{
 45	driver_unregister(&tdrv->driver);
 46}
 47EXPORT_SYMBOL(tc_unregister_driver);
 48
 49/**
 50 * tc_match_device - tell if a TC device structure has a matching
 51 *                   TC device ID structure
 52 * @tdrv: the TC driver to earch for matching TC device ID strings
 53 * @tdev: the TC device structure to match against
 54 *
 55 * Used by a driver to check whether a TC device present in the
 56 * system is in its list of supported devices.  Returns the matching
 57 * tc_device_id structure or %NULL if there is no match.
 58 */
 59static const struct tc_device_id *tc_match_device(struct tc_driver *tdrv,
 60						  struct tc_dev *tdev)
 61{
 62	const struct tc_device_id *id = tdrv->id_table;
 63
 64	if (id) {
 65		while (id->name[0] || id->vendor[0]) {
 66			if (strcmp(tdev->name, id->name) == 0 &&
 67			    strcmp(tdev->vendor, id->vendor) == 0)
 68				return id;
 69			id++;
 70		}
 71	}
 72	return NULL;
 73}
 74
 75/**
 76 * tc_bus_match - Tell if a device structure has a matching
 77 *                TC device ID structure
 78 * @dev: the device structure to match against
 79 * @drv: the device driver to search for matching TC device ID strings
 80 *
 81 * Used by a driver to check whether a TC device present in the
 82 * system is in its list of supported devices.  Returns 1 if there
 83 * is a match or 0 otherwise.
 84 */
 85static int tc_bus_match(struct device *dev, struct device_driver *drv)
 86{
 87	struct tc_dev *tdev = to_tc_dev(dev);
 88	struct tc_driver *tdrv = to_tc_driver(drv);
 89	const struct tc_device_id *id;
 90
 91	id = tc_match_device(tdrv, tdev);
 92	if (id)
 93		return 1;
 94
 95	return 0;
 96}
 97
 98struct bus_type tc_bus_type = {
 99	.name	= "tc",
100	.match	= tc_bus_match,
101};
102EXPORT_SYMBOL(tc_bus_type);
103
104static int __init tc_driver_init(void)
105{
106	return bus_register(&tc_bus_type);
107}
108
109postcore_initcall(tc_driver_init);