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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 | } | |
d996e9dc | 40 | EXPORT_SYMBOL(zorro_match_device); |
1da177e4 LT |
41 | |
42 | ||
43 | static int zorro_device_probe(struct device *dev) | |
44 | { | |
45 | int error = 0; | |
46 | struct zorro_driver *drv = to_zorro_driver(dev->driver); | |
47 | struct zorro_dev *z = to_zorro_dev(dev); | |
48 | ||
49 | if (!z->driver && drv->probe) { | |
50 | const struct zorro_device_id *id; | |
51 | ||
52 | id = zorro_match_device(drv->id_table, z); | |
53 | if (id) | |
54 | error = drv->probe(z, id); | |
55 | if (error >= 0) { | |
56 | z->driver = drv; | |
57 | error = 0; | |
58 | } | |
59 | } | |
60 | return error; | |
61 | } | |
62 | ||
63 | ||
2f9b0b5e GU |
64 | static int zorro_device_remove(struct device *dev) |
65 | { | |
66 | struct zorro_dev *z = to_zorro_dev(dev); | |
67 | struct zorro_driver *drv = to_zorro_driver(dev->driver); | |
68 | ||
69 | if (drv) { | |
70 | if (drv->remove) | |
71 | drv->remove(z); | |
72 | z->driver = NULL; | |
73 | } | |
74 | return 0; | |
75 | } | |
76 | ||
77 | ||
1da177e4 LT |
78 | /** |
79 | * zorro_register_driver - register a new Zorro driver | |
80 | * @drv: the driver structure to register | |
81 | * | |
82 | * Adds the driver structure to the list of registered drivers | |
33d8675e | 83 | * Returns zero or a negative error value. |
1da177e4 LT |
84 | */ |
85 | ||
86 | int zorro_register_driver(struct zorro_driver *drv) | |
87 | { | |
1da177e4 LT |
88 | /* initialize common driver fields */ |
89 | drv->driver.name = drv->name; | |
90 | drv->driver.bus = &zorro_bus_type; | |
1da177e4 LT |
91 | |
92 | /* register with core */ | |
33d8675e | 93 | return driver_register(&drv->driver); |
1da177e4 | 94 | } |
d996e9dc | 95 | EXPORT_SYMBOL(zorro_register_driver); |
1da177e4 LT |
96 | |
97 | ||
98 | /** | |
99 | * zorro_unregister_driver - unregister a zorro driver | |
100 | * @drv: the driver structure to unregister | |
101 | * | |
102 | * Deletes the driver structure from the list of registered Zorro drivers, | |
103 | * gives it a chance to clean up by calling its remove() function for | |
104 | * each device it was responsible for, and marks those devices as | |
105 | * driverless. | |
106 | */ | |
107 | ||
108 | void zorro_unregister_driver(struct zorro_driver *drv) | |
109 | { | |
110 | driver_unregister(&drv->driver); | |
111 | } | |
d996e9dc | 112 | EXPORT_SYMBOL(zorro_unregister_driver); |
1da177e4 LT |
113 | |
114 | ||
115 | /** | |
116 | * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro | |
117 | * device id structure | |
118 | * @ids: array of Zorro device id structures to search in | |
119 | * @dev: the Zorro device structure to match against | |
120 | * | |
121 | * Used by a driver to check whether a Zorro device present in the | |
122 | * system is in its list of supported devices.Returns the matching | |
123 | * zorro_device_id structure or %NULL if there is no match. | |
124 | */ | |
125 | ||
126 | static int zorro_bus_match(struct device *dev, struct device_driver *drv) | |
127 | { | |
128 | struct zorro_dev *z = to_zorro_dev(dev); | |
129 | struct zorro_driver *zorro_drv = to_zorro_driver(drv); | |
130 | const struct zorro_device_id *ids = zorro_drv->id_table; | |
131 | ||
132 | if (!ids) | |
133 | return 0; | |
134 | ||
135 | while (ids->id) { | |
136 | if (ids->id == ZORRO_WILDCARD || ids->id == z->id) | |
137 | return 1; | |
138 | ids++; | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
bf54a2b3 GU |
143 | static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env) |
144 | { | |
bf54a2b3 GU |
145 | struct zorro_dev *z; |
146 | ||
147 | if (!dev) | |
148 | return -ENODEV; | |
149 | ||
150 | z = to_zorro_dev(dev); | |
151 | if (!z) | |
152 | return -ENODEV; | |
153 | ||
154 | if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) || | |
155 | add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) || | |
156 | add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) || | |
157 | add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) | |
158 | return -ENOMEM; | |
159 | ||
160 | return 0; | |
bf54a2b3 | 161 | } |
1da177e4 LT |
162 | |
163 | struct bus_type zorro_bus_type = { | |
83b7bce3 GU |
164 | .name = "zorro", |
165 | .dev_name = "zorro", | |
166 | .match = zorro_bus_match, | |
167 | .uevent = zorro_uevent, | |
168 | .probe = zorro_device_probe, | |
169 | .remove = zorro_device_remove, | |
1da177e4 | 170 | }; |
d996e9dc | 171 | EXPORT_SYMBOL(zorro_bus_type); |
1da177e4 LT |
172 | |
173 | ||
174 | static int __init zorro_driver_init(void) | |
175 | { | |
176 | return bus_register(&zorro_bus_type); | |
177 | } | |
178 | ||
179 | postcore_initcall(zorro_driver_init); | |
180 |