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
|
/*
* chips.c: Console support for PowerBook 3400/2400 chips65550 display adaptor.
*
* Copyright (C) 1997 Fabio Riccardi.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/vc_ioctl.h>
#include <linux/pci.h>
#include <linux/bios32.h>
#include <linux/selection.h>
#include <asm/prom.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include "pmac-cons.h"
#include "chips.h"
static unsigned char *frame_buffer;
static unsigned char *blitter_regs;
static unsigned char *io_space;
void
map_chips_display(struct device_node *dp)
{
unsigned char bus, devfn;
unsigned short cmd;
unsigned long addr;
addr = dp->addrs[0].address;
frame_buffer = ioremap(addr + 0x800000, 0x100000);
blitter_regs = ioremap(addr + 0xC00000, 4096);
printk("Mapped chips65550 frame buffer at %p, blitter at %p\n", frame_buffer, blitter_regs);
if (pci_device_loc(dp, &bus, &devfn) == 0) {
pcibios_read_config_word(bus, devfn, PCI_COMMAND, &cmd);
cmd |= 3; // enable memory and IO space
pcibios_write_config_word(bus, devfn, PCI_COMMAND, cmd);
io_space = ioremap((unsigned long) pci_io_base(bus), 4096);
printk("Mapped chips65550 IO space at %p\n", io_space);
}
video_mode = VMODE_800_600_60;
color_mode = CMODE_8;
}
#define write_xr(num,val) { out_8(io_space + 0x3D6, num); out_8(io_space + 0x3D7, val); }
#define read_xr(num,var) { out_8(io_space + 0x3D6, num); var = in_8(io_space + 0x3D7); }
#define write_fr(num,val) { out_8(io_space + 0x3D0, num); out_8(io_space + 0x3D1, val); }
#define read_fr(num,var) { out_8(io_space + 0x3D0, num); var = in_8(io_space + 0x3D1); }
#define write_cr(num,val) { out_8(io_space + 0x3D4, num); out_8(io_space + 0x3D5, val); }
#define read_cr(num,var) { out_8(io_space + 0x3D4, num); var = in_8(io_space + 0x3D5); }
void
chips_init()
{
unsigned *p;
int i, hres;
if (video_mode != VMODE_800_600_60)
panic("chips65550: display mode %d not supported", video_mode);
if (color_mode != CMODE_8 && color_mode != CMODE_16)
panic("chips65550: color mode %d not supported", color_mode);
n_scanlines = 600;
hres = 800;
pixel_size = 1 << color_mode;
line_pitch = hres * pixel_size;
row_pitch = line_pitch * 16;
if (color_mode == CMODE_16) {
write_cr(0x13, 200); // 16 bit display width (decimal)
write_xr(0x81, 0x14); // 15 bit (TrueColor) color mode
write_xr(0x82, 0x00); // disable palettes
write_xr(0x20, 0x10); // 16 bit blitter mode
// write_xr(0x80, 0x00); // 6 bit DAC
// write_fr(0x11, 0X50); // No dither, 5 bits/color
} else if (color_mode == CMODE_8) {
write_cr(0x13, 100); // 8 bit display width (decimal)
write_xr(0x81, 0x12); // 8 bit color mode
write_xr(0x82, 0x08); // Graphics gamma enable
write_xr(0x20, 0x00); // 8 bit blitter mode
// write_xr(0x80, 0x82); // 8 bit DAC, CRT overscan
// write_fr(0x11, 0XE0); // Res Dither on, 6 bits/pixel
}
pmac_init_palette(); /* Initialize colormap */
fb_start = frame_buffer;
printk(KERN_INFO "hres = %d height = %d pitch = %d\n",
hres, n_scanlines, line_pitch);
display_info.height = n_scanlines;
display_info.width = hres;
display_info.depth = pixel_size * 8;
display_info.pitch = line_pitch;
display_info.mode = video_mode;
strncpy(display_info.name, "chips65550", sizeof(display_info.name));
display_info.fb_address = (unsigned long) frame_buffer;
display_info.cmap_adr_address = 0;
display_info.cmap_data_address = 0;
display_info.disp_reg_address = 0;
/* Clear screen */
p = (unsigned *) frame_buffer;
for (i = n_scanlines * line_pitch / sizeof(unsigned); i != 0; --i)
*p++ = 0;
}
int
chips_setmode(struct vc_mode *mode, int doit)
{
int cmode;
switch (mode->depth) {
case 16:
cmode = CMODE_16;
break;
case 8:
case 0: /* (default) */
cmode = CMODE_8;
break;
default:
return -EINVAL;
}
if (mode->mode != VMODE_800_600_60)
return -EINVAL;
if (doit) {
video_mode = mode->mode;
color_mode = cmode;
chips_init();
}
return 0;
}
void
chips_set_palette(unsigned char red[], unsigned char green[],
unsigned char blue[], int index, int ncolors)
{
int i;
for (i = 0; i < ncolors; ++i) {
out_8(&io_space[0x3C8], index + i);
udelay(1);
out_8(&io_space[0x3C9], red[i]);
out_8(&io_space[0x3C9], green[i]);
out_8(&io_space[0x3C9], blue[i]);
}
}
void
chips_set_blanking(int blank_mode)
{
}
|
