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 */
59const 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}
74EXPORT_SYMBOL(tc_match_device);
75
76/**
77 * tc_bus_match - Tell if a device structure has a matching
78 *                TC device ID structure
79 * @dev: the device structure to match against
80 * @drv: the device driver to search for matching TC device ID strings
81 *
82 * Used by a driver to check whether a TC device present in the
83 * system is in its list of supported devices.  Returns 1 if there
84 * is a match or 0 otherwise.
85 */
86static int tc_bus_match(struct device *dev, struct device_driver *drv)
87{
88	struct tc_dev *tdev = to_tc_dev(dev);
89	struct tc_driver *tdrv = to_tc_driver(drv);
90	const struct tc_device_id *id;
91
92	id = tc_match_device(tdrv, tdev);
93	if (id)
94		return 1;
95
96	return 0;
97}
98
99struct bus_type tc_bus_type = {
100	.name	= "tc",
101	.match	= tc_bus_match,
102};
103EXPORT_SYMBOL(tc_bus_type);
104
105static int __init tc_driver_init(void)
106{
107	return bus_register(&tc_bus_type);
108}
109
110postcore_initcall(tc_driver_init);
111