1/*-
2 * Copyright (c) 1998 Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
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26 * $Id: smbus.c,v 1.8 1999/02/13 17:57:19 nsouch Exp $
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| 26 * $Id: smbus.c,v 1.9 1999/05/08 21:59:08 dfr Exp $ |
27 *
28 */
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/module.h>
33#include <sys/bus.h>
34
35#include <dev/smbus/smbconf.h>
36#include <dev/smbus/smbus.h>
37
38/*
39 * Autoconfiguration and support routines for the Philips serial I2C bus
40 */
41
42#define DEVTOSMBUS(dev) ((struct smbus_device*)device_get_ivars(dev))
43
44/*
45 * structure used to attach devices to the I2C bus
46 */
47struct smbus_device {
48 const char *smbd_name; /* device name */
49 const char *smbd_desc; /* device descriptor */
50};
51
52/*
53 * list of known devices
54 */
55struct smbus_device smbus_children[] = {
56 { "smb", "SMBus general purpose I/O" },
57 { NULL, 0 }
58};
59
60static devclass_t smbus_devclass;
61
62/*
63 * Device methods
64 */
65static int smbus_probe(device_t);
66static int smbus_attach(device_t);
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67static void smbus_print_child(device_t, device_t);
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67
68#if 0
69static int smbus_read_ivar(device_t , device_t, int, u_long *);
70#endif
71
72static device_method_t smbus_methods[] = {
73 /* device interface */
74 DEVMETHOD(device_probe, smbus_probe),
75 DEVMETHOD(device_attach, smbus_attach),
76 DEVMETHOD(device_detach, bus_generic_detach),
77 DEVMETHOD(device_shutdown, bus_generic_shutdown),
78
79 /* bus interface */
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81 DEVMETHOD(bus_print_child, smbus_print_child),
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| 80 DEVMETHOD(bus_print_child, bus_generic_print_child), |
81 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
82 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
83
84 { 0, 0 }
85};
86
87static driver_t smbus_driver = {
88 "smbus",
89 smbus_methods,
90 sizeof(struct smbus_softc),
91};
92
93/*
94 * At 'probe' time, we add all the devices which we know about to the
95 * bus. The generic attach routine will probe and attach them if they
96 * are alive.
97 */
98static int
99smbus_probe(device_t dev)
100{
101 device_set_desc(dev, "System Management Bus");
102
103 return (0);
104}
105
106static int
107smbus_attach(device_t dev)
108{
109 struct smbus_device *smbdev;
110
111 /* add known devices */
112 for (smbdev = smbus_children; smbdev->smbd_name; smbdev++) {
113 device_t child;
114
115 if (devclass_find(smbdev->smbd_name)) {
116 child = device_add_child(dev, smbdev->smbd_name,
117 -1, smbdev);
118 device_set_desc(child, smbdev->smbd_desc);
119 } else if (bootverbose)
120 printf("smbus: %s devclass not found\n",
121 smbdev->smbd_name);
122 }
123 bus_generic_attach(dev);
124
125 return (0);
126}
127
128void
129smbus_generic_intr(device_t dev, u_char devaddr, char low, char high)
130{
131 return;
132}
133
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135static void
136smbus_print_child(device_t bus, device_t dev)
137{
138
139 printf(" on %s%d", device_get_name(bus), device_get_unit(bus));
140
141 return;
142}
143
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134#if 0
135static int
136smbus_read_ivar(device_t bus, device_t dev, int index, u_long* result)
137{
138 struct smbus_device* smbdev = DEVTOSMBUS(dev);
139
140 switch (index) {
141 default:
142 break;
143 }
144 return (ENOENT);
145}
146#endif
147
148DRIVER_MODULE(smbus, iicsmb, smbus_driver, smbus_devclass, 0, 0);
149DRIVER_MODULE(smbus, bti2c, smbus_driver, smbus_devclass, 0, 0);
150DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0);
151DRIVER_MODULE(smbus, alsmb, smbus_driver, smbus_devclass, 0, 0);
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