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  */
tc_register_driver(struct tc_driver * tdrv)28 int tc_register_driver(struct tc_driver *tdrv)
29 {
30 	return driver_register(&tdrv->driver);
31 }
32 EXPORT_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  */
tc_unregister_driver(struct tc_driver * tdrv)43 void tc_unregister_driver(struct tc_driver *tdrv)
44 {
45 	driver_unregister(&tdrv->driver);
46 }
47 EXPORT_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  */
tc_match_device(struct tc_driver * tdrv,struct tc_dev * tdev)59 static 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  */
tc_bus_match(struct device * dev,struct device_driver * drv)85 static 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 
98 struct bus_type tc_bus_type = {
99 	.name	= "tc",
100 	.match	= tc_bus_match,
101 };
102 EXPORT_SYMBOL(tc_bus_type);
103 
tc_driver_init(void)104 static int __init tc_driver_init(void)
105 {
106 	return bus_register(&tc_bus_type);
107 }
108 
109 postcore_initcall(tc_driver_init);
110