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 (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			error = 0;
58	}
59	return error;
60}
61
62
63static 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
81int 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->driver);
89}
90EXPORT_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
103void zorro_unregister_driver(struct zorro_driver *drv)
104{
105	driver_unregister(&drv->driver);
106}
107EXPORT_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
121static 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
133static 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, "ZORRO_ID=%08X", z->id) ||
145	    add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) ||
146	    add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) ||
147	    add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
148		return -ENOMEM;
149
150	return 0;
151}
152
153const 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};
162EXPORT_SYMBOL(zorro_bus_type);
163
164
165static int __init zorro_driver_init(void)
166{
167	return bus_register(&zorro_bus_type);
168}
169
170postcore_initcall(zorro_driver_init);
171
172