Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / zorro / zorro-driver.c
blobe6c4390d8bd68ff5df14056e1decb13c2435f88d
1 /*
2 * Zorro Driver Services
4 * Copyright (C) 2003 Geert Uytterhoeven
6 * Loosely based on drivers/pci/pci-driver.c
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.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/zorro.h>
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
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.
29 const struct zorro_device_id *
30 zorro_match_device(const struct zorro_device_id *ids,
31 const struct zorro_dev *z)
33 while (ids->id) {
34 if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
35 return ids;
36 ids++;
38 return NULL;
42 static int zorro_device_probe(struct device *dev)
44 int error = 0;
45 struct zorro_driver *drv = to_zorro_driver(dev->driver);
46 struct zorro_dev *z = to_zorro_dev(dev);
48 if (!z->driver && drv->probe) {
49 const struct zorro_device_id *id;
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;
59 return error;
63 static int zorro_device_remove(struct device *dev)
65 struct zorro_dev *z = to_zorro_dev(dev);
66 struct zorro_driver *drv = to_zorro_driver(dev->driver);
68 if (drv) {
69 if (drv->remove)
70 drv->remove(z);
71 z->driver = NULL;
73 return 0;
77 /**
78 * zorro_register_driver - register a new Zorro driver
79 * @drv: the driver structure to register
81 * Adds the driver structure to the list of registered drivers
82 * Returns zero or a negative error value.
85 int zorro_register_driver(struct zorro_driver *drv)
87 /* initialize common driver fields */
88 drv->driver.name = drv->name;
89 drv->driver.bus = &zorro_bus_type;
91 /* register with core */
92 return driver_register(&drv->driver);
96 /**
97 * zorro_unregister_driver - unregister a zorro driver
98 * @drv: the driver structure to unregister
100 * Deletes the driver structure from the list of registered Zorro drivers,
101 * gives it a chance to clean up by calling its remove() function for
102 * each device it was responsible for, and marks those devices as
103 * driverless.
106 void zorro_unregister_driver(struct zorro_driver *drv)
108 driver_unregister(&drv->driver);
113 * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
114 * device id structure
115 * @ids: array of Zorro device id structures to search in
116 * @dev: the Zorro device structure to match against
118 * Used by a driver to check whether a Zorro device present in the
119 * system is in its list of supported devices.Returns the matching
120 * zorro_device_id structure or %NULL if there is no match.
123 static int zorro_bus_match(struct device *dev, struct device_driver *drv)
125 struct zorro_dev *z = to_zorro_dev(dev);
126 struct zorro_driver *zorro_drv = to_zorro_driver(drv);
127 const struct zorro_device_id *ids = zorro_drv->id_table;
129 if (!ids)
130 return 0;
132 while (ids->id) {
133 if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
134 return 1;
135 ids++;
137 return 0;
141 struct bus_type zorro_bus_type = {
142 .name = "zorro",
143 .match = zorro_bus_match,
144 .probe = zorro_device_probe,
145 .remove = zorro_device_remove,
149 static int __init zorro_driver_init(void)
151 return bus_register(&zorro_bus_type);
154 postcore_initcall(zorro_driver_init);
156 EXPORT_SYMBOL(zorro_match_device);
157 EXPORT_SYMBOL(zorro_register_driver);
158 EXPORT_SYMBOL(zorro_unregister_driver);
159 EXPORT_SYMBOL(zorro_dev_driver);
160 EXPORT_SYMBOL(zorro_bus_type);