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
31static const struct zorro_device_id *
32zorro_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
44static 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
65static int zorro_device_remove(struct device *dev)
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	}
75	return 0;
76}
77
78
79    /**
80     *  zorro_register_driver - register a new Zorro driver
81     *  @drv: the driver structure to register
82     *
83     *  Adds the driver structure to the list of registered drivers
84     *  Returns zero or a negative error value.
85     */
86
87int zorro_register_driver(struct zorro_driver *drv)
88{
89	/* initialize common driver fields */
90	drv->driver.name = drv->name;
91	drv->driver.bus = &zorro_bus_type;
92
93	/* register with core */
94	return driver_register(&drv->driver);
95}
96EXPORT_SYMBOL(zorro_register_driver);
97
98
99    /**
100     *  zorro_unregister_driver - unregister a zorro driver
101     *  @drv: the driver structure to unregister
102     *
103     *  Deletes the driver structure from the list of registered Zorro drivers,
104     *  gives it a chance to clean up by calling its remove() function for
105     *  each device it was responsible for, and marks those devices as
106     *  driverless.
107     */
108
109void zorro_unregister_driver(struct zorro_driver *drv)
110{
111	driver_unregister(&drv->driver);
112}
113EXPORT_SYMBOL(zorro_unregister_driver);
114
115
116    /**
117     *  zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
118     *                    device id structure
119     *  @ids: array of Zorro device id structures to search in
120     *  @dev: the Zorro device structure to match against
121     *
122     *  Used by the driver core to check whether a Zorro device present in the
123     *  system is in a driver's list of supported devices.  Returns 1 if
124     *  supported, and 0 if there is no match.
125     */
126
127static int zorro_bus_match(struct device *dev, struct device_driver *drv)
128{
129	struct zorro_dev *z = to_zorro_dev(dev);
130	struct zorro_driver *zorro_drv = to_zorro_driver(drv);
131	const struct zorro_device_id *ids = zorro_drv->id_table;
132
133	if (!ids)
134		return 0;
135
136	return !!zorro_match_device(ids, z);
137}
138
139static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env)
140{
141	struct zorro_dev *z;
142
143	if (!dev)
144		return -ENODEV;
145
146	z = to_zorro_dev(dev);
147	if (!z)
148		return -ENODEV;
149
150	if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) ||
151	    add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) ||
152	    add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) ||
153	    add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
154		return -ENOMEM;
155
156	return 0;
157}
158
159struct bus_type zorro_bus_type = {
160	.name		= "zorro",
161	.dev_name	= "zorro",
162	.dev_groups	= zorro_device_attribute_groups,
163	.match		= zorro_bus_match,
164	.uevent		= zorro_uevent,
165	.probe		= zorro_device_probe,
166	.remove		= zorro_device_remove,
167};
168EXPORT_SYMBOL(zorro_bus_type);
169
170
171static int __init zorro_driver_init(void)
172{
173	return bus_register(&zorro_bus_type);
174}
175
176postcore_initcall(zorro_driver_init);
177
178