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
|
/*
* 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 Greg Watson <jarrah@users.sourceforge.net>
* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
* Copyright (C) 2005-2006 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 <device/device.h>
#include <device/path.h>
#include <device/pci.h>
#include <device/resource.h>
/** Linked list of ALL devices */
ROMSTAGE_CONST struct device * ROMSTAGE_CONST all_devices = &dev_root;
/**
* Given a PCI bus and a devfn number, find the device structure.
*
* @param bus The bus number.
* @param devfn A device/function number.
* @return Pointer to the device structure (if found), 0 otherwise.
*/
ROMSTAGE_CONST struct device *dev_find_slot(unsigned int bus,
unsigned int devfn)
{
ROMSTAGE_CONST struct device *dev, *result;
result = 0;
for (dev = all_devices; dev; dev = dev->next) {
if ((dev->path.type == DEVICE_PATH_PCI) &&
(dev->bus->secondary == bus) &&
(dev->path.pci.devfn == devfn)) {
result = dev;
break;
}
}
return result;
}
/**
* Given a device pointer, find the next PCI device.
*
* @param previous_dev A pointer to a PCI device structure.
* @return Pointer to the next device structure (if found), 0 otherwise.
*/
ROMSTAGE_CONST struct device *dev_find_next_pci_device(
ROMSTAGE_CONST struct device *previous_dev)
{
ROMSTAGE_CONST struct device *dev, *result;
if (previous_dev == NULL)
previous_dev = all_devices;
result = 0;
for (dev = previous_dev->next; dev; dev = dev->next) {
if (dev->path.type == DEVICE_PATH_PCI) {
result = dev;
break;
}
}
return result;
}
/**
* Given an SMBus bus and a device number, find the device structure.
*
* @param bus The bus number.
* @param addr A device number.
* @return Pointer to the device structure (if found), 0 otherwise.
*/
ROMSTAGE_CONST struct device *dev_find_slot_on_smbus(unsigned int bus,
unsigned int addr)
{
ROMSTAGE_CONST struct device *dev, *result;
result = 0;
for (dev = all_devices; dev; dev = dev->next) {
if ((dev->path.type == DEVICE_PATH_I2C) &&
(dev->bus->secondary == bus) &&
(dev->path.i2c.device == addr)) {
result = dev;
break;
}
}
return result;
}
/**
* Given a PnP port and a device number, find the device structure.
*
* @param port The I/O port.
* @param device Logical device number.
* @return Pointer to the device structure (if found), 0 otherwise.
*/
ROMSTAGE_CONST struct device *dev_find_slot_pnp(u16 port, u16 device)
{
ROMSTAGE_CONST struct device *dev;
for (dev = all_devices; dev; dev = dev->next) {
if ((dev->path.type == DEVICE_PATH_PNP) &&
(dev->path.pnp.port == port) &&
(dev->path.pnp.device == device)) {
return dev;
}
}
return 0;
}
|
