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1da177e4 LT |
1 | /* |
2 | * Zorro Driver Services | |
3 | * | |
4 | * Copyright (C) 2003 Geert Uytterhoeven | |
5 | * | |
6 | * Loosely based on drivers/pci/pci-driver.c | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General Public | |
9 | * License. See the file COPYING in the main directory of this archive | |
10 | * for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/zorro.h> | |
16 | ||
17 | ||
18 | /** | |
19 | * zorro_match_device - Tell if a Zorro device structure has a matching | |
20 | * Zorro device id structure | |
21 | * @ids: array of Zorro device id structures to search in | |
22 | * @dev: the Zorro device structure to match against | |
23 | * | |
24 | * Used by a driver to check whether a Zorro device present in the | |
25 | * system is in its list of supported devices. Returns the matching | |
26 | * zorro_device_id structure or %NULL if there is no match. | |
27 | */ | |
28 | ||
29 | const struct zorro_device_id * | |
30 | zorro_match_device(const struct zorro_device_id *ids, | |
31 | const struct zorro_dev *z) | |
32 | { | |
33 | while (ids->id) { | |
34 | if (ids->id == ZORRO_WILDCARD || ids->id == z->id) | |
35 | return ids; | |
36 | ids++; | |
37 | } | |
38 | return NULL; | |
39 | } | |
40 | ||
41 | ||
42 | static int zorro_device_probe(struct device *dev) | |
43 | { | |
44 | int error = 0; | |
45 | struct zorro_driver *drv = to_zorro_driver(dev->driver); | |
46 | struct zorro_dev *z = to_zorro_dev(dev); | |
47 | ||
48 | if (!z->driver && drv->probe) { | |
49 | const struct zorro_device_id *id; | |
50 | ||
51 | id = zorro_match_device(drv->id_table, z); | |
52 | if (id) | |
53 | error = drv->probe(z, id); | |
54 | if (error >= 0) { | |
55 | z->driver = drv; | |
56 | error = 0; | |
57 | } | |
58 | } | |
59 | return error; | |
60 | } | |
61 | ||
62 | ||
63 | /** | |
64 | * zorro_register_driver - register a new Zorro driver | |
65 | * @drv: the driver structure to register | |
66 | * | |
67 | * Adds the driver structure to the list of registered drivers | |
33d8675e | 68 | * Returns zero or a negative error value. |
1da177e4 LT |
69 | */ |
70 | ||
71 | int zorro_register_driver(struct zorro_driver *drv) | |
72 | { | |
1da177e4 LT |
73 | /* initialize common driver fields */ |
74 | drv->driver.name = drv->name; | |
75 | drv->driver.bus = &zorro_bus_type; | |
1da177e4 LT |
76 | |
77 | /* register with core */ | |
33d8675e | 78 | return driver_register(&drv->driver); |
1da177e4 LT |
79 | } |
80 | ||
81 | ||
82 | /** | |
83 | * zorro_unregister_driver - unregister a zorro driver | |
84 | * @drv: the driver structure to unregister | |
85 | * | |
86 | * Deletes the driver structure from the list of registered Zorro drivers, | |
87 | * gives it a chance to clean up by calling its remove() function for | |
88 | * each device it was responsible for, and marks those devices as | |
89 | * driverless. | |
90 | */ | |
91 | ||
92 | void zorro_unregister_driver(struct zorro_driver *drv) | |
93 | { | |
94 | driver_unregister(&drv->driver); | |
95 | } | |
96 | ||
97 | ||
98 | /** | |
99 | * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro | |
100 | * device id structure | |
101 | * @ids: array of Zorro device id structures to search in | |
102 | * @dev: the Zorro device structure to match against | |
103 | * | |
104 | * Used by a driver to check whether a Zorro device present in the | |
105 | * system is in its list of supported devices.Returns the matching | |
106 | * zorro_device_id structure or %NULL if there is no match. | |
107 | */ | |
108 | ||
109 | static int zorro_bus_match(struct device *dev, struct device_driver *drv) | |
110 | { | |
111 | struct zorro_dev *z = to_zorro_dev(dev); | |
112 | struct zorro_driver *zorro_drv = to_zorro_driver(drv); | |
113 | const struct zorro_device_id *ids = zorro_drv->id_table; | |
114 | ||
115 | if (!ids) | |
116 | return 0; | |
117 | ||
118 | while (ids->id) { | |
119 | if (ids->id == ZORRO_WILDCARD || ids->id == z->id) | |
120 | return 1; | |
121 | ids++; | |
122 | } | |
123 | return 0; | |
124 | } | |
125 | ||
126 | ||
127 | struct bus_type zorro_bus_type = { | |
128 | .name = "zorro", | |
b6a01e9b RK |
129 | .match = zorro_bus_match, |
130 | .probe = zorro_device_probe, | |
1da177e4 LT |
131 | }; |
132 | ||
133 | ||
134 | static int __init zorro_driver_init(void) | |
135 | { | |
136 | return bus_register(&zorro_bus_type); | |
137 | } | |
138 | ||
139 | postcore_initcall(zorro_driver_init); | |
140 | ||
141 | EXPORT_SYMBOL(zorro_match_device); | |
142 | EXPORT_SYMBOL(zorro_register_driver); | |
143 | EXPORT_SYMBOL(zorro_unregister_driver); | |
144 | EXPORT_SYMBOL(zorro_dev_driver); | |
145 | EXPORT_SYMBOL(zorro_bus_type); |