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
|
#include <stdint.h>
#include <delay.h>
#include <edid.h>
#include <stdlib.h>
#include <string.h>
#include <arch/io.h>
#include <boot/coreboot_tables.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <pc80/vga.h>
#include <pc80/vga_io.h>
/* VGA init. We use the Bochs VESA VBE extensions */
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID4 0xB0C4
#define VBE_DISPI_ID5 0xB0C5
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
static int width = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_XRES;
static int height = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_YRES;
static void bochs_write(int index, int val)
{
outw(index, VBE_DISPI_IOPORT_INDEX);
outw(val, VBE_DISPI_IOPORT_DATA);
}
static int bochs_read(int index)
{
outw(index, VBE_DISPI_IOPORT_INDEX);
return inw(VBE_DISPI_IOPORT_DATA);
}
#endif
static void bochs_init(struct device *dev)
{
#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
struct edid edid;
int id, mem, bar;
u32 addr;
/* bochs dispi detection */
id = bochs_read(VBE_DISPI_INDEX_ID);
if ((id & 0xfff0) != VBE_DISPI_ID0) {
printk(BIOS_DEBUG, "QEMU VGA: bochs dispi: ID mismatch.\n");
return;
}
mem = bochs_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024;
/* find lfb pci bar */
addr = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
if ((addr & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
/* qemu -vga {std,qxl} */
bar = 0;
} else {
/* qemu -vga vmware */
addr = pci_read_config32(dev, PCI_BASE_ADDRESS_1);
bar = 1;
}
addr &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
if (!addr)
return;
printk(BIOS_DEBUG, "QEMU VGA: bochs dispi interface found, "
"%d MiB video memory\n", mem / ( 1024 * 1024));
printk(BIOS_DEBUG, "QEMU VGA: framebuffer @ %x (pci bar %d)\n",
addr, bar);
/* setup video mode */
bochs_write(VBE_DISPI_INDEX_ENABLE, 0);
bochs_write(VBE_DISPI_INDEX_BANK, 0);
bochs_write(VBE_DISPI_INDEX_BPP, 32);
bochs_write(VBE_DISPI_INDEX_XRES, width);
bochs_write(VBE_DISPI_INDEX_YRES, height);
bochs_write(VBE_DISPI_INDEX_VIRT_WIDTH, width);
bochs_write(VBE_DISPI_INDEX_VIRT_HEIGHT, height);
bochs_write(VBE_DISPI_INDEX_X_OFFSET, 0);
bochs_write(VBE_DISPI_INDEX_Y_OFFSET, 0);
bochs_write(VBE_DISPI_INDEX_ENABLE,
VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
outb(0x20, 0x3c0); /* disable blanking */
/* setup coreboot framebuffer */
edid.mode.ha = width;
edid.mode.va = height;
edid.panel_bits_per_color = 8;
edid.panel_bits_per_pixel = 24;
edid_set_framebuffer_bits_per_pixel(&edid, 32, 0);
set_vbe_mode_info_valid(&edid, addr);
#else
vga_misc_write(0x1);
vga_textmode_init();
#endif
}
static struct device_operations qemu_graph_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = bochs_init,
.scan_bus = 0,
};
static const struct pci_driver qemu_stdvga_driver __pci_driver = {
.ops = &qemu_graph_ops,
.vendor = 0x1234,
.device = 0x1111,
};
static const struct pci_driver qemu_vmware_driver __pci_driver = {
.ops = &qemu_graph_ops,
.vendor = 0x15ad,
.device = 0x0405,
};
static const struct pci_driver qemu_qxl_driver __pci_driver = {
.ops = &qemu_graph_ops,
.vendor = 0x1b36,
.device = 0x0100,
};
|
