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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 | ||
87e715de DT |
17 | #include "zorro.h" |
18 | ||
1da177e4 LT |
19 | |
20 | /** | |
21 | * zorro_match_device - Tell if a Zorro device structure has a matching | |
22 | * Zorro device id structure | |
23 | * @ids: array of Zorro device id structures to search in | |
24 | * @dev: the Zorro device structure to match against | |
25 | * | |
26 | * Used by a driver to check whether a Zorro device present in the | |
27 | * system is in its list of supported devices. Returns the matching | |
28 | * zorro_device_id structure or %NULL if there is no match. | |
29 | */ | |
30 | ||
0cfb07c5 | 31 | static const struct zorro_device_id * |
1da177e4 LT |
32 | zorro_match_device(const struct zorro_device_id *ids, |
33 | const struct zorro_dev *z) | |
34 | { | |
35 | while (ids->id) { | |
36 | if (ids->id == ZORRO_WILDCARD || ids->id == z->id) | |
37 | return ids; | |
38 | ids++; | |
39 | } | |
40 | return NULL; | |
41 | } | |
42 | ||
43 | ||
44 | static int zorro_device_probe(struct device *dev) | |
45 | { | |
46 | int error = 0; | |
47 | struct zorro_driver *drv = to_zorro_driver(dev->driver); | |
48 | struct zorro_dev *z = to_zorro_dev(dev); | |
49 | ||
50 | if (!z->driver && drv->probe) { | |
51 | const struct zorro_device_id *id; | |
52 | ||
53 | id = zorro_match_device(drv->id_table, z); | |
54 | if (id) | |
55 | error = drv->probe(z, id); | |
56 | if (error >= 0) { | |
57 | z->driver = drv; | |
58 | error = 0; | |
59 | } | |
60 | } | |
61 | return error; | |
62 | } | |
63 | ||
64 | ||
fc7a6209 | 65 | static void zorro_device_remove(struct device *dev) |
2f9b0b5e GU |
66 | { |
67 | struct zorro_dev *z = to_zorro_dev(dev); | |
68 | struct zorro_driver *drv = to_zorro_driver(dev->driver); | |
69 | ||
70 | if (drv) { | |
71 | if (drv->remove) | |
72 | drv->remove(z); | |
73 | z->driver = NULL; | |
74 | } | |
2f9b0b5e GU |
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 | * | |
aeee094d GU |
121 | * Used by the driver core to check whether a Zorro device present in the |
122 | * system is in a driver's list of supported devices. Returns 1 if | |
123 | * supported, and 0 if there is no match. | |
1da177e4 LT |
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 | ||
3d52910e | 135 | return !!zorro_match_device(ids, z); |
1da177e4 LT |
136 | } |
137 | ||
bf54a2b3 GU |
138 | static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env) |
139 | { | |
bf54a2b3 GU |
140 | struct zorro_dev *z; |
141 | ||
142 | if (!dev) | |
143 | return -ENODEV; | |
144 | ||
145 | z = to_zorro_dev(dev); | |
146 | if (!z) | |
147 | return -ENODEV; | |
148 | ||
149 | if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) || | |
150 | add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) || | |
151 | add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) || | |
152 | add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) | |
153 | return -ENOMEM; | |
154 | ||
155 | return 0; | |
bf54a2b3 | 156 | } |
1da177e4 LT |
157 | |
158 | struct bus_type zorro_bus_type = { | |
87e715de DT |
159 | .name = "zorro", |
160 | .dev_name = "zorro", | |
161 | .dev_groups = zorro_device_attribute_groups, | |
162 | .match = zorro_bus_match, | |
163 | .uevent = zorro_uevent, | |
164 | .probe = zorro_device_probe, | |
165 | .remove = zorro_device_remove, | |
1da177e4 | 166 | }; |
d996e9dc | 167 | EXPORT_SYMBOL(zorro_bus_type); |
1da177e4 LT |
168 | |
169 | ||
170 | static int __init zorro_driver_init(void) | |
171 | { | |
172 | return bus_register(&zorro_bus_type); | |
173 | } | |
174 | ||
175 | postcore_initcall(zorro_driver_init); | |
176 |