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 | */ |
28 | int tc_register_driver(struct tc_driver *tdrv) |
29 | { |
30 | return driver_register(drv: &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 | */ |
43 | void tc_unregister_driver(struct tc_driver *tdrv) |
44 | { |
45 | driver_unregister(drv: &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 | */ |
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 | */ |
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 | |
104 | static int __init tc_driver_init(void) |
105 | { |
106 | return bus_register(bus: &tc_bus_type); |
107 | } |
108 | |
109 | postcore_initcall(tc_driver_init); |
110 | |