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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
Geert Uytterhoeven2f9b0b52007-11-18 11:10:04 +010063static int zorro_device_remove(struct device *dev)
64{
65 struct zorro_dev *z = to_zorro_dev(dev);
66 struct zorro_driver *drv = to_zorro_driver(dev->driver);
67
68 if (drv) {
69 if (drv->remove)
70 drv->remove(z);
71 z->driver = NULL;
72 }
73 return 0;
74}
75
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 /**
78 * zorro_register_driver - register a new Zorro driver
79 * @drv: the driver structure to register
80 *
81 * Adds the driver structure to the list of registered drivers
Bjorn Helgaas33d86752006-03-25 03:07:20 -080082 * Returns zero or a negative error value.
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 */
84
85int zorro_register_driver(struct zorro_driver *drv)
86{
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 /* initialize common driver fields */
88 drv->driver.name = drv->name;
89 drv->driver.bus = &zorro_bus_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 /* register with core */
Bjorn Helgaas33d86752006-03-25 03:07:20 -080092 return driver_register(&drv->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093}
94
95
96 /**
97 * zorro_unregister_driver - unregister a zorro driver
98 * @drv: the driver structure to unregister
99 *
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.
104 */
105
106void zorro_unregister_driver(struct zorro_driver *drv)
107{
108 driver_unregister(&drv->driver);
109}
110
111
112 /**
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
117 *
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.
121 */
122
123static int zorro_bus_match(struct device *dev, struct device_driver *drv)
124{
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;
128
129 if (!ids)
130 return 0;
131
132 while (ids->id) {
133 if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
134 return 1;
135 ids++;
136 }
137 return 0;
138}
139
140
141struct bus_type zorro_bus_type = {
142 .name = "zorro",
Russell Kingb6a01e92006-01-05 14:43:43 +0000143 .match = zorro_bus_match,
144 .probe = zorro_device_probe,
Geert Uytterhoeven2f9b0b52007-11-18 11:10:04 +0100145 .remove = zorro_device_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146};
147
148
149static int __init zorro_driver_init(void)
150{
151 return bus_register(&zorro_bus_type);
152}
153
154postcore_initcall(zorro_driver_init);
155
156EXPORT_SYMBOL(zorro_match_device);
157EXPORT_SYMBOL(zorro_register_driver);
158EXPORT_SYMBOL(zorro_unregister_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159EXPORT_SYMBOL(zorro_bus_type);