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 | #include "zorro.h" |
18 | |
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 | |
31 | static const struct zorro_device_id * |
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 (drv->probe) { |
51 | const struct zorro_device_id *id; |
52 | |
53 | id = zorro_match_device(ids: drv->id_table, z); |
54 | if (id) |
55 | error = drv->probe(z, id); |
56 | if (error >= 0) |
57 | error = 0; |
58 | } |
59 | return error; |
60 | } |
61 | |
62 | |
63 | static void 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->remove) |
69 | drv->remove(z); |
70 | } |
71 | |
72 | |
73 | /** |
74 | * zorro_register_driver - register a new Zorro driver |
75 | * @drv: the driver structure to register |
76 | * |
77 | * Adds the driver structure to the list of registered drivers |
78 | * Returns zero or a negative error value. |
79 | */ |
80 | |
81 | int zorro_register_driver(struct zorro_driver *drv) |
82 | { |
83 | /* initialize common driver fields */ |
84 | drv->driver.name = drv->name; |
85 | drv->driver.bus = &zorro_bus_type; |
86 | |
87 | /* register with core */ |
88 | return driver_register(drv: &drv->driver); |
89 | } |
90 | EXPORT_SYMBOL(zorro_register_driver); |
91 | |
92 | |
93 | /** |
94 | * zorro_unregister_driver - unregister a zorro driver |
95 | * @drv: the driver structure to unregister |
96 | * |
97 | * Deletes the driver structure from the list of registered Zorro drivers, |
98 | * gives it a chance to clean up by calling its remove() function for |
99 | * each device it was responsible for, and marks those devices as |
100 | * driverless. |
101 | */ |
102 | |
103 | void zorro_unregister_driver(struct zorro_driver *drv) |
104 | { |
105 | driver_unregister(drv: &drv->driver); |
106 | } |
107 | EXPORT_SYMBOL(zorro_unregister_driver); |
108 | |
109 | |
110 | /** |
111 | * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro |
112 | * device id structure |
113 | * @ids: array of Zorro device id structures to search in |
114 | * @dev: the Zorro device structure to match against |
115 | * |
116 | * Used by the driver core to check whether a Zorro device present in the |
117 | * system is in a driver's list of supported devices. Returns 1 if |
118 | * supported, and 0 if there is no match. |
119 | */ |
120 | |
121 | static int zorro_bus_match(struct device *dev, struct device_driver *drv) |
122 | { |
123 | struct zorro_dev *z = to_zorro_dev(dev); |
124 | struct zorro_driver *zorro_drv = to_zorro_driver(drv); |
125 | const struct zorro_device_id *ids = zorro_drv->id_table; |
126 | |
127 | if (!ids) |
128 | return 0; |
129 | |
130 | return !!zorro_match_device(ids, z); |
131 | } |
132 | |
133 | static int zorro_uevent(const struct device *dev, struct kobj_uevent_env *env) |
134 | { |
135 | const struct zorro_dev *z; |
136 | |
137 | if (!dev) |
138 | return -ENODEV; |
139 | |
140 | z = to_zorro_dev(dev); |
141 | if (!z) |
142 | return -ENODEV; |
143 | |
144 | if (add_uevent_var(env, format: "ZORRO_ID=%08X" , z->id) || |
145 | add_uevent_var(env, format: "ZORRO_SLOT_NAME=%s" , dev_name(dev)) || |
146 | add_uevent_var(env, format: "ZORRO_SLOT_ADDR=%04X" , z->slotaddr) || |
147 | add_uevent_var(env, format: "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) |
148 | return -ENOMEM; |
149 | |
150 | return 0; |
151 | } |
152 | |
153 | struct bus_type zorro_bus_type = { |
154 | .name = "zorro" , |
155 | .dev_name = "zorro" , |
156 | .dev_groups = zorro_device_attribute_groups, |
157 | .match = zorro_bus_match, |
158 | .uevent = zorro_uevent, |
159 | .probe = zorro_device_probe, |
160 | .remove = zorro_device_remove, |
161 | }; |
162 | EXPORT_SYMBOL(zorro_bus_type); |
163 | |
164 | |
165 | static int __init zorro_driver_init(void) |
166 | { |
167 | return bus_register(bus: &zorro_bus_type); |
168 | } |
169 | |
170 | postcore_initcall(zorro_driver_init); |
171 | |
172 | |