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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
*
* 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.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "sb700.h"
static void pci_init(struct device *dev)
{
u32 dword;
u16 word;
u8 byte;
/* RPR 5.1 Enables the PCI-bridge subtractive decode */
/* This setting is strongly recommended since it supports some legacy PCI add-on cards,such as BIOS debug cards */
byte = pci_read_config8(dev, 0x4B);
byte |= 1 << 7;
pci_write_config8(dev, 0x4B, byte);
byte = pci_read_config8(dev, 0x40);
byte |= 1 << 5;
pci_write_config8(dev, 0x40, byte);
/* RPR5.2 PCI-bridge upstream dual address window */
/* this setting is applicable if the system memory is more than 4GB,and the PCI device can support dual address access */
byte = pci_read_config8(dev, 0x50);
byte |= 1 << 0;
pci_write_config8(dev, 0x50, byte);
/* RPR 5.3 PCI bus 64-byte DMA read access */
/* Enhance the PCI bus DMA performance */
byte = pci_read_config8(dev, 0x4B);
byte |= 1 << 4;
pci_write_config8(dev, 0x4B, byte);
/* RPR 5.4 Enables the PCIB writes to be cacheline aligned. */
/* The size of the writes will be set in the Cacheline Register */
byte = pci_read_config8(dev, 0x40);
byte |= 1 << 1;
pci_write_config8(dev, 0x40, byte);
/* RPR 5.5 Enables the PCIB to retain ownership of the bus on the Primary side and on the Secondary side when GNT# is deasserted */
pci_write_config8(dev, 0x0D, 0x40);
pci_write_config8(dev, 0x1B, 0x40);
/* RPR 5.6 Enable the command matching checking function on "Memory Read" & "Memory Read Line" commands */
byte = pci_read_config8(dev, 0x4B);
byte |= 1 << 6;
pci_write_config8(dev, 0x4B, byte);
/* RPR 5.7 When enabled, the PCI arbiter checks for the Bus Idle before asserting GNT# */
byte = pci_read_config8(dev, 0x4B);
byte |= 1 << 0;
pci_write_config8(dev, 0x4B, byte);
/* RPR 5.8 Adjusts the GNT# de-assertion time */
word = pci_read_config16(dev, 0x64);
word |= 1 << 12;
pci_write_config16(dev, 0x64, word);
/* RPR 5.9 Fast Back to Back transactions support */
byte = pci_read_config8(dev, 0x48);
byte |= 1 << 2;
/* pci_write_config8(dev, 0x48, byte); */
/* RPR 5.10 Enable Lock Operation */
/* byte = pci_read_config8(dev, 0x48); */
byte |= 1 << 3;
pci_write_config8(dev, 0x48, byte);
/* RPR 5.11 Enable additional optional PCI clock */
word = pci_read_config16(dev, 0x64);
word |= 1 << 8;
pci_write_config16(dev, 0x64, word);
/* RPR 5.12 Enable One-Prefetch-Channel Mode */
dword = pci_read_config32(dev, 0x64);
dword |= 1 << 20;
pci_write_config32(dev, 0x64, dword);
/* RPR 5.13 Disable PCIB MSI Capability */
byte = pci_read_config8(dev, 0x40);
byte &= ~(1 << 3);
pci_write_config8(dev, 0x40, byte);
/* rpr5.14 Adjusting CLKRUN# */
dword = pci_read_config32(dev, 0x64);
dword |= (1 << 15);
pci_write_config32(dev, 0x64, dword);
}
static struct pci_operations lops_pci = {
.set_subsystem = 0,
};
static struct device_operations pci_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pci_init,
.scan_bus = pci_scan_bridge,
.reset_bus = pci_bus_reset,
.ops_pci = &lops_pci,
};
static const struct pci_driver pci_driver __pci_driver = {
.ops = &pci_ops,
.vendor = PCI_VENDOR_ID_ATI,
.device = PCI_DEVICE_ID_ATI_SB700_PCI,
};
|
