1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2003-2004 Linux Networx
* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
* Copyright (C) 2003 Ronald G. Minnich <rminnich@gmail.com>
* Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
* Copyright (C) 2005 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <reset.h>
const char mainboard_name[] = CONFIG_MAINBOARD_VENDOR " " CONFIG_MAINBOARD_PART_NUMBER;
/**
* Scan devices on static buses.
*
* The enumeration of certain buses is purely static. The existence of
* devices on those buses can be completely determined at compile time
* and is specified in the config file. Typical examples are the 'PNP'
* devices on a legacy ISA/LPC bus. There is no need of probing of any kind,
* the only thing we have to do is to walk through the bus and
* enable or disable devices as indicated in the config file.
*
* On the other hand, some devices are virtual and their existence is
* artificial. They can not be probed at run time. One example is the
* debug device. Those virtual devices have to be listed in the config
* file under some static bus in order to be enumerated at run time.
*
* @param bus Pointer to the device to which the static buses are attached to.
* @param max Maximum bus number currently used before scanning.
* @return The largest bus number used.
*/
static unsigned int scan_static_bus(device_t bus, unsigned int passthru)
{
device_t child;
struct bus *link;
for (link = bus->link_list; link; link = link->next) {
for (child = link->children; child; child = child->sibling) {
if (child->chip_ops && child->chip_ops->enable_dev)
child->chip_ops->enable_dev(child);
if (child->ops && child->ops->enable)
child->ops->enable(child);
printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
child->enabled ? "enabled" : "disabled");
}
}
return passthru;
}
unsigned int scan_lpc_bus(device_t bus, unsigned int passthru)
{
printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
scan_static_bus(bus, 0);
printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
return passthru;
}
unsigned int scan_smbus(device_t bus, unsigned int passthru)
{
device_t child;
struct bus *link;
static int smbus_max = 0;
printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
for (link = bus->link_list; link; link = link->next) {
link->secondary = ++smbus_max;
for (child = link->children; child; child = child->sibling) {
if (child->chip_ops && child->chip_ops->enable_dev)
child->chip_ops->enable_dev(child);
if (child->ops && child->ops->enable)
child->ops->enable(child);
printk(BIOS_DEBUG, "smbus: %s[%d]->", dev_path(child->bus->dev),
child->bus->link_num);
printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
child->enabled ? "enabled" : "disabled");
}
}
printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
return passthru;
}
/**
* Scan root bus for generic systems.
*
* This function is the default scan_bus() method of the root device.
*
* @param root The root device structure.
* @param max The current bus number scanned so far, usually 0x00.
* @return The largest bus number used.
*/
static unsigned int root_dev_scan_bus(device_t bus, unsigned int passthru)
{
struct bus *link;
printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));
scan_static_bus(bus, 0);
for (link = bus->link_list; link; link = link->next)
scan_bridges(link);
printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
return passthru;
}
static void root_dev_reset(struct bus *bus)
{
printk(BIOS_INFO, "Resetting board...\n");
hard_reset();
}
/**
* Default device operation for root device.
*
* This is the default device operation for root devices. These operations
* should be fully usable as is. However the chip_operations::enable_dev()
* of a motherboard can override this if you want non-default behavior.
*/
struct device_operations default_dev_ops_root = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.init = DEVICE_NOOP,
.scan_bus = root_dev_scan_bus,
.reset_bus = root_dev_reset,
};
|
