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
164
165
166
167
168
169
170
171
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <cpu/cpu.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <arch/interrupt.h>
#include <x86emu/regs.h>
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
#include <devices/oprom/realmode/x86.h>
#endif
static int via_vt8623_int15_handler(void)
{
int res=0;
printk(BIOS_DEBUG, "via_vt8623_int15_handler\n");
switch(X86_EAX & 0xffff) {
case 0x5f19:
break;
case 0x5f18:
X86_EAX=0x5f;
X86_EBX=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
X86_ECX=0x060;
res=1;
break;
case 0x5f00:
X86_EAX = 0x8600;
break;
case 0x5f01:
X86_EAX = 0x5f;
X86_ECX = (X86_ECX & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
res = 1;
break;
case 0x5f02:
X86_EAX=0x5f;
X86_EBX= (X86_EBX & 0xffff0000) | 2;
X86_ECX= (X86_ECX & 0xffff0000) | 0x401; // PAL + crt only
X86_EDX= (X86_EDX & 0xffff0000) | 0; // TV Layout - default
res=1;
break;
case 0x5f0f:
X86_EAX=0x860f;
break;
default:
printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
X86_EAX & 0xffff);
break;
}
return res;
}
#ifdef UNUSED_CODE
static void write_protect_vgabios(void)
{
device_t dev;
printk(BIOS_DEBUG, "write_protect_vgabios\n");
dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3122, 0);
if (dev)
pci_write_config8(dev, 0x61, 0xaa);
dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3123, 0);
if (dev)
pci_write_config8(dev, 0x61, 0xaa);
}
#endif
static void vga_random_fixup(device_t dev)
{
printk(BIOS_DEBUG, "VGA random fixup ...\n");
pci_write_config8(dev, 0x04, 0x07);
pci_write_config8(dev, 0x0d, 0x20);
pci_write_config32(dev,0x10,0xd8000008);
pci_write_config32(dev,0x14,0xdc000000);
}
static void vga_enable_console(void)
{
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
/* Call VGA BIOS int10 function 0x4f14 to enable main console
* Epia-M does not always autosense the main console so forcing
* it on is good.
*/
/* int#, EAX, EBX, ECX, EDX, ESI, EDI */
realmode_interrupt(0x10, 0x4f14, 0x8003, 0x0001, 0x0000, 0x0000, 0x0000);
#endif
}
static void vga_init(device_t dev)
{
vga_random_fixup(dev);
mainboard_interrupt_handlers(0x15, &via_vt8623_int15_handler);
#ifdef MEASURE_VGA_INIT_TIME
msr_t clocks1, clocks2, instructions, setup;
// set up performnce counters for debugging vga init sequence
setup.lo = 0x1c0; // count instructions
wrmsr(0x187,setup);
instructions.hi = 0;
instructions.lo = 0;
wrmsr(0xc2,instructions);
clocks1 = rdmsr(0x10);
#endif
printk(BIOS_DEBUG, "Initializing VGA...\n");
pci_dev_init(dev);
printk(BIOS_DEBUG, "Enable VGA console\n");
vga_enable_console();
#ifdef MEASURE_VGA_INIT_TIME
clocks2 = rdmsr(0x10);
instructions = rdmsr(0xc2);
printk(BIOS_DEBUG, "Clocks 1 = %08x:%08x\n",clocks1.hi,clocks1.lo);
printk(BIOS_DEBUG, "Clocks 2 = %08x:%08x\n",clocks2.hi,clocks2.lo);
printk(BIOS_DEBUG, "Instructions = %08x:%08x\n",instructions.hi,instructions.lo);
#endif
pci_write_config32(dev, 0x30, 0);
#if 0
/* Set the vga mtrrs - disable for the moment as the add_var_mtrr function has vapourised */
unsigned long fb;
add_var_mtrr( 0xd0000000 >> 10, 0x08000000>>10, MTRR_TYPE_WRCOMB);
fb = pci_read_config32(dev,0x10); // get the fb address
add_var_mtrr( fb>>10, 8192, MTRR_TYPE_WRCOMB);
#endif
}
static struct device_operations vga_operations = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = vga_init,
.ops_pci = 0,
};
static const struct pci_driver vga_driver __pci_driver = {
.ops = &vga_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x3122,
};
|
