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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
29const struct zorro_device_id *
30zorro_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
42static 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
Bjorn Helgaas33d86752006-03-25 03:07:20 -080068 * Returns zero or a negative error value.
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 */
70
71int zorro_register_driver(struct zorro_driver *drv)
72{
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 /* initialize common driver fields */
74 drv->driver.name = drv->name;
75 drv->driver.bus = &zorro_bus_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77 /* register with core */
Bjorn Helgaas33d86752006-03-25 03:07:20 -080078 return driver_register(&drv->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079}
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
92void 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
109static 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
127struct bus_type zorro_bus_type = {
128 .name = "zorro",
Russell Kingb6a01e92006-01-05 14:43:43 +0000129 .match = zorro_bus_match,
130 .probe = zorro_device_probe,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131};
132
133
134static int __init zorro_driver_init(void)
135{
136 return bus_register(&zorro_bus_type);
137}
138
139postcore_initcall(zorro_driver_init);
140
141EXPORT_SYMBOL(zorro_match_device);
142EXPORT_SYMBOL(zorro_register_driver);
143EXPORT_SYMBOL(zorro_unregister_driver);
144EXPORT_SYMBOL(zorro_dev_driver);
145EXPORT_SYMBOL(zorro_bus_type);