OpenCores
URL https://opencores.org/ocsvn/or1k_soc_on_altera_embedded_dev_kit/or1k_soc_on_altera_embedded_dev_kit/trunk

Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [drivers/] [zorro/] [zorro-driver.c] - Blame information for rev 3

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 3 xianfeng 
/*
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 
}
40 
 
41 
 
42 
static 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 
static 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 
 
77 
    /**
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
82 
     *  Returns zero or a negative error value.
83 
     */
84 
 
85 
int zorro_register_driver(struct zorro_driver *drv)
86 
{
87 
        /* initialize common driver fields */
88 
        drv->driver.name = drv->name;
89 
        drv->driver.bus = &zorro_bus_type;
90 
 
91 
        /* register with core */
92 
        return driver_register(&drv->driver);
93 
}
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 
 
106 
void 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 
 
123 
static 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 
 
141 
struct bus_type zorro_bus_type = {
142 
        .name   = "zorro",
143 
        .match  = zorro_bus_match,
144 
        .probe  = zorro_device_probe,
145 
        .remove = zorro_device_remove,
146 
};
147 
 
148 
 
149 
static int __init zorro_driver_init(void)
150 
{
151 
        return bus_register(&zorro_bus_type);
152 
}
153 
 
154 
postcore_initcall(zorro_driver_init);
155 
 
156 
EXPORT_SYMBOL(zorro_match_device);
157 
EXPORT_SYMBOL(zorro_register_driver);
158 
EXPORT_SYMBOL(zorro_unregister_driver);
159 
EXPORT_SYMBOL(zorro_dev_driver);
160 
EXPORT_SYMBOL(zorro_bus_type);

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.