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kernel-ark/arch/ppc/boot/lib/vreset.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

806 lines
18 KiB
C
Raw Blame History

/*
* vreset.c
*
* Initialize the VGA control registers to 80x25 text mode.
*
* Adapted from a program by:
* Steve Sellgren
* San Francisco Indigo Company
* sfindigo!sellgren@uunet.uu.net
*
* Original concept by:
* Gary Thomas <gdt@linuxppc.org>
* Adapted for Moto boxes by:
* Pat Kane & Mark Scott, 1996
* Adapted for IBM portables by:
* Takeshi Ishimoto
* Multi-console support:
* Terje Malmedal <terje.malmedal@usit.uio.no>
*/
#include "iso_font.h"
#include "nonstdio.h"
extern char *vidmem;
extern int lines, cols;
struct VaRegs;
/*
* VGA Register
*/
struct VgaRegs
{
unsigned short io_port;
unsigned char io_index;
unsigned char io_value;
};
void unlockVideo(int slot);
void setTextRegs(struct VgaRegs *svp);
void setTextCLUT(int shift);
void clearVideoMemory(void);
void loadFont(unsigned char *ISA_mem);
static void mdelay(int ms)
{
for (; ms > 0; --ms)
udelay(1000);
}
/*
* Default console text mode registers used to reset
* graphics adapter.
*/
#define NREGS 54
#define ENDMK 0xFFFF /* End marker */
#define S3Vendor 0x5333
#define CirrusVendor 0x1013
#define DiamondVendor 0x100E
#define MatroxVendor 0x102B
#define ParadiseVendor 0x101C
struct VgaRegs GenVgaTextRegs[NREGS+1] = {
/* port index value */
/* SR Regs */
{ 0x3c4, 0x1, 0x0 },
{ 0x3c4, 0x2, 0x3 },
{ 0x3c4, 0x3, 0x0 },
{ 0x3c4, 0x4, 0x2 },
/* CR Regs */
{ 0x3d4, 0x0, 0x5f },
{ 0x3d4, 0x1, 0x4f },
{ 0x3d4, 0x2, 0x50 },
{ 0x3d4, 0x3, 0x82 },
{ 0x3d4, 0x4, 0x55 },
{ 0x3d4, 0x5, 0x81 },
{ 0x3d4, 0x6, 0xbf },
{ 0x3d4, 0x7, 0x1f },
{ 0x3d4, 0x8, 0x00 },
{ 0x3d4, 0x9, 0x4f },
{ 0x3d4, 0xa, 0x0d },
{ 0x3d4, 0xb, 0x0e },
{ 0x3d4, 0xc, 0x00 },
{ 0x3d4, 0xd, 0x00 },
{ 0x3d4, 0xe, 0x00 },
{ 0x3d4, 0xf, 0x00 },
{ 0x3d4, 0x10, 0x9c },
{ 0x3d4, 0x11, 0x8e },
{ 0x3d4, 0x12, 0x8f },
{ 0x3d4, 0x13, 0x28 },
{ 0x3d4, 0x14, 0x1f },
{ 0x3d4, 0x15, 0x96 },
{ 0x3d4, 0x16, 0xb9 },
{ 0x3d4, 0x17, 0xa3 },
/* GR Regs */
{ 0x3ce, 0x0, 0x0 },
{ 0x3ce, 0x1, 0x0 },
{ 0x3ce, 0x2, 0x0 },
{ 0x3ce, 0x3, 0x0 },
{ 0x3ce, 0x4, 0x0 },
{ 0x3ce, 0x5, 0x10 },
{ 0x3ce, 0x6, 0xe },
{ 0x3ce, 0x7, 0x0 },
{ 0x3ce, 0x8, 0xff },
{ ENDMK }
};
struct RGBColors
{
unsigned char r, g, b;
};
/*
* Default console text mode color table.
* These values were obtained by booting Linux with
* text mode firmware & then dumping the registers.
*/
struct RGBColors TextCLUT[256] =
{
/* red green blue */
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x2a },
{ 0x0, 0x2a, 0x0 },
{ 0x0, 0x2a, 0x2a },
{ 0x2a, 0x0, 0x0 },
{ 0x2a, 0x0, 0x2a },
{ 0x2a, 0x2a, 0x0 },
{ 0x2a, 0x2a, 0x2a },
{ 0x0, 0x0, 0x15 },
{ 0x0, 0x0, 0x3f },
{ 0x0, 0x2a, 0x15 },
{ 0x0, 0x2a, 0x3f },
{ 0x2a, 0x0, 0x15 },
{ 0x2a, 0x0, 0x3f },
{ 0x2a, 0x2a, 0x15 },
{ 0x2a, 0x2a, 0x3f },
{ 0x0, 0x15, 0x0 },
{ 0x0, 0x15, 0x2a },
{ 0x0, 0x3f, 0x0 },
{ 0x0, 0x3f, 0x2a },
{ 0x2a, 0x15, 0x0 },
{ 0x2a, 0x15, 0x2a },
{ 0x2a, 0x3f, 0x0 },
{ 0x2a, 0x3f, 0x2a },
{ 0x0, 0x15, 0x15 },
{ 0x0, 0x15, 0x3f },
{ 0x0, 0x3f, 0x15 },
{ 0x0, 0x3f, 0x3f },
{ 0x2a, 0x15, 0x15 },
{ 0x2a, 0x15, 0x3f },
{ 0x2a, 0x3f, 0x15 },
{ 0x2a, 0x3f, 0x3f },
{ 0x15, 0x0, 0x0 },
{ 0x15, 0x0, 0x2a },
{ 0x15, 0x2a, 0x0 },
{ 0x15, 0x2a, 0x2a },
{ 0x3f, 0x0, 0x0 },
{ 0x3f, 0x0, 0x2a },
{ 0x3f, 0x2a, 0x0 },
{ 0x3f, 0x2a, 0x2a },
{ 0x15, 0x0, 0x15 },
{ 0x15, 0x0, 0x3f },
{ 0x15, 0x2a, 0x15 },
{ 0x15, 0x2a, 0x3f },
{ 0x3f, 0x0, 0x15 },
{ 0x3f, 0x0, 0x3f },
{ 0x3f, 0x2a, 0x15 },
{ 0x3f, 0x2a, 0x3f },
{ 0x15, 0x15, 0x0 },
{ 0x15, 0x15, 0x2a },
{ 0x15, 0x3f, 0x0 },
{ 0x15, 0x3f, 0x2a },
{ 0x3f, 0x15, 0x0 },
{ 0x3f, 0x15, 0x2a },
{ 0x3f, 0x3f, 0x0 },
{ 0x3f, 0x3f, 0x2a },
{ 0x15, 0x15, 0x15 },
{ 0x15, 0x15, 0x3f },
{ 0x15, 0x3f, 0x15 },
{ 0x15, 0x3f, 0x3f },
{ 0x3f, 0x15, 0x15 },
{ 0x3f, 0x15, 0x3f },
{ 0x3f, 0x3f, 0x15 },
{ 0x3f, 0x3f, 0x3f },
{ 0x39, 0xc, 0x5 },
{ 0x15, 0x2c, 0xf },
{ 0x26, 0x10, 0x3d },
{ 0x29, 0x29, 0x38 },
{ 0x4, 0x1a, 0xe },
{ 0x2, 0x1e, 0x3a },
{ 0x3c, 0x25, 0x33 },
{ 0x3c, 0xc, 0x2c },
{ 0x3f, 0x3, 0x2b },
{ 0x1c, 0x9, 0x13 },
{ 0x25, 0x2a, 0x35 },
{ 0x1e, 0xa, 0x38 },
{ 0x24, 0x8, 0x3 },
{ 0x3, 0xe, 0x36 },
{ 0xc, 0x6, 0x2a },
{ 0x26, 0x3, 0x32 },
{ 0x5, 0x2f, 0x33 },
{ 0x3c, 0x35, 0x2f },
{ 0x2d, 0x26, 0x3e },
{ 0xd, 0xa, 0x10 },
{ 0x25, 0x3c, 0x11 },
{ 0xd, 0x4, 0x2e },
{ 0x5, 0x19, 0x3e },
{ 0xc, 0x13, 0x34 },
{ 0x2b, 0x6, 0x24 },
{ 0x4, 0x3, 0xd },
{ 0x2f, 0x3c, 0xc },
{ 0x2a, 0x37, 0x1f },
{ 0xf, 0x12, 0x38 },
{ 0x38, 0xe, 0x2a },
{ 0x12, 0x2f, 0x19 },
{ 0x29, 0x2e, 0x31 },
{ 0x25, 0x13, 0x3e },
{ 0x33, 0x3e, 0x33 },
{ 0x1d, 0x2c, 0x25 },
{ 0x15, 0x15, 0x5 },
{ 0x32, 0x25, 0x39 },
{ 0x1a, 0x7, 0x1f },
{ 0x13, 0xe, 0x1d },
{ 0x36, 0x17, 0x34 },
{ 0xf, 0x15, 0x23 },
{ 0x2, 0x35, 0xd },
{ 0x15, 0x3f, 0xc },
{ 0x14, 0x2f, 0xf },
{ 0x19, 0x21, 0x3e },
{ 0x27, 0x11, 0x2f },
{ 0x38, 0x3f, 0x3c },
{ 0x36, 0x2d, 0x15 },
{ 0x16, 0x17, 0x2 },
{ 0x1, 0xa, 0x3d },
{ 0x1b, 0x11, 0x3f },
{ 0x21, 0x3c, 0xd },
{ 0x1a, 0x39, 0x3d },
{ 0x8, 0xe, 0xe },
{ 0x22, 0x21, 0x23 },
{ 0x1e, 0x30, 0x5 },
{ 0x1f, 0x22, 0x3d },
{ 0x1e, 0x2f, 0xa },
{ 0x0, 0x1c, 0xe },
{ 0x0, 0x1c, 0x15 },
{ 0x0, 0x1c, 0x1c },
{ 0x0, 0x15, 0x1c },
{ 0x0, 0xe, 0x1c },
{ 0x0, 0x7, 0x1c },
{ 0xe, 0xe, 0x1c },
{ 0x11, 0xe, 0x1c },
{ 0x15, 0xe, 0x1c },
{ 0x18, 0xe, 0x1c },
{ 0x1c, 0xe, 0x1c },
{ 0x1c, 0xe, 0x18 },
{ 0x1c, 0xe, 0x15 },
{ 0x1c, 0xe, 0x11 },
{ 0x1c, 0xe, 0xe },
{ 0x1c, 0x11, 0xe },
{ 0x1c, 0x15, 0xe },
{ 0x1c, 0x18, 0xe },
{ 0x1c, 0x1c, 0xe },
{ 0x18, 0x1c, 0xe },
{ 0x15, 0x1c, 0xe },
{ 0x11, 0x1c, 0xe },
{ 0xe, 0x1c, 0xe },
{ 0xe, 0x1c, 0x11 },
{ 0xe, 0x1c, 0x15 },
{ 0xe, 0x1c, 0x18 },
{ 0xe, 0x1c, 0x1c },
{ 0xe, 0x18, 0x1c },
{ 0xe, 0x15, 0x1c },
{ 0xe, 0x11, 0x1c },
{ 0x14, 0x14, 0x1c },
{ 0x16, 0x14, 0x1c },
{ 0x18, 0x14, 0x1c },
{ 0x1a, 0x14, 0x1c },
{ 0x1c, 0x14, 0x1c },
{ 0x1c, 0x14, 0x1a },
{ 0x1c, 0x14, 0x18 },
{ 0x1c, 0x14, 0x16 },
{ 0x1c, 0x14, 0x14 },
{ 0x1c, 0x16, 0x14 },
{ 0x1c, 0x18, 0x14 },
{ 0x1c, 0x1a, 0x14 },
{ 0x1c, 0x1c, 0x14 },
{ 0x1a, 0x1c, 0x14 },
{ 0x18, 0x1c, 0x14 },
{ 0x16, 0x1c, 0x14 },
{ 0x14, 0x1c, 0x14 },
{ 0x14, 0x1c, 0x16 },
{ 0x14, 0x1c, 0x18 },
{ 0x14, 0x1c, 0x1a },
{ 0x14, 0x1c, 0x1c },
{ 0x14, 0x1a, 0x1c },
{ 0x14, 0x18, 0x1c },
{ 0x14, 0x16, 0x1c },
{ 0x0, 0x0, 0x10 },
{ 0x4, 0x0, 0x10 },
{ 0x8, 0x0, 0x10 },
{ 0xc, 0x0, 0x10 },
{ 0x10, 0x0, 0x10 },
{ 0x10, 0x0, 0xc },
{ 0x10, 0x0, 0x8 },
{ 0x10, 0x0, 0x4 },
{ 0x10, 0x0, 0x0 },
{ 0x10, 0x4, 0x0 },
{ 0x10, 0x8, 0x0 },
{ 0x10, 0xc, 0x0 },
{ 0x10, 0x10, 0x0 },
{ 0xc, 0x10, 0x0 },
{ 0x8, 0x10, 0x0 },
{ 0x4, 0x10, 0x0 },
{ 0x0, 0x10, 0x0 },
{ 0x0, 0x10, 0x4 },
{ 0x0, 0x10, 0x8 },
{ 0x0, 0x10, 0xc },
{ 0x0, 0x10, 0x10 },
{ 0x0, 0xc, 0x10 },
{ 0x0, 0x8, 0x10 },
{ 0x0, 0x4, 0x10 },
{ 0x8, 0x8, 0x10 },
{ 0xa, 0x8, 0x10 },
{ 0xc, 0x8, 0x10 },
{ 0xe, 0x8, 0x10 },
{ 0x10, 0x8, 0x10 },
{ 0x10, 0x8, 0xe },
{ 0x10, 0x8, 0xc },
{ 0x10, 0x8, 0xa },
{ 0x10, 0x8, 0x8 },
{ 0x10, 0xa, 0x8 },
{ 0x10, 0xc, 0x8 },
{ 0x10, 0xe, 0x8 },
{ 0x10, 0x10, 0x8 },
{ 0xe, 0x10, 0x8 },
{ 0xc, 0x10, 0x8 },
{ 0xa, 0x10, 0x8 },
{ 0x8, 0x10, 0x8 },
{ 0x8, 0x10, 0xa },
{ 0x8, 0x10, 0xc },
{ 0x8, 0x10, 0xe },
{ 0x8, 0x10, 0x10 },
{ 0x8, 0xe, 0x10 },
{ 0x8, 0xc, 0x10 },
{ 0x8, 0xa, 0x10 },
{ 0xb, 0xb, 0x10 },
{ 0xc, 0xb, 0x10 },
{ 0xd, 0xb, 0x10 },
{ 0xf, 0xb, 0x10 },
{ 0x10, 0xb, 0x10 },
{ 0x10, 0xb, 0xf },
{ 0x10, 0xb, 0xd },
{ 0x10, 0xb, 0xc },
{ 0x10, 0xb, 0xb },
{ 0x10, 0xc, 0xb },
{ 0x10, 0xd, 0xb },
{ 0x10, 0xf, 0xb },
{ 0x10, 0x10, 0xb },
{ 0xf, 0x10, 0xb },
{ 0xd, 0x10, 0xb },
{ 0xc, 0x10, 0xb },
{ 0xb, 0x10, 0xb },
{ 0xb, 0x10, 0xc },
{ 0xb, 0x10, 0xd },
{ 0xb, 0x10, 0xf },
{ 0xb, 0x10, 0x10 },
{ 0xb, 0xf, 0x10 },
{ 0xb, 0xd, 0x10 },
{ 0xb, 0xc, 0x10 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 },
{ 0x0, 0x0, 0x0 }
};
unsigned char AC[21] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x0C, 0x00, 0x0F, 0x08, 0x00};
static int scanPCI(int start_slt);
static int PCIVendor(int);
#ifdef DEBUG
static void printslots(void);
#endif
extern void puthex(unsigned long);
extern void puts(const char *);
static void unlockS3(void);
static inline void
outw(int port, unsigned short val)
{
outb(port, val >> 8);
outb(port+1, val);
}
int
vga_init(unsigned char *ISA_mem)
{
int slot;
struct VgaRegs *VgaTextRegs;
/* See if VGA already in TEXT mode - exit if so! */
outb(0x3CE, 0x06);
if ((inb(0x3CF) & 0x01) == 0){
puts("VGA already in text mode\n");
return 0;
}
/* If no VGA responding in text mode, then we have some work to do...
*/
slot = -1;
while((slot = scanPCI(slot)) > -1) { /* find video card in use */
unlockVideo(slot); /* enable I/O to card */
VgaTextRegs = GenVgaTextRegs;
switch (PCIVendor(slot)) {
default:
break;
case(S3Vendor):
unlockS3();
break;
case(CirrusVendor):
outw(0x3C4, 0x0612); /* unlock ext regs */
outw(0x3C4, 0x0700); /* reset ext sequence mode */
break;
case(ParadiseVendor): /* IBM Portable 850 */
outw(0x3ce, 0x0f05); /* unlock pardise registers */
outw(0x3c4, 0x0648);
outw(0x3d4, 0x2985);
outw(0x3d4, 0x34a6);
outb(0x3ce, 0x0b); /* disable linear addressing */
outb(0x3cf, inb(0x3cf) & ~0x30);
outw(0x3c4, 0x1400);
outb(0x3ce, 0x0e); /* disable 256 color mode */
outb(0x3cf, inb(0x3cf) & ~0x01);
outb(0xd00, 0xff); /* enable auto-centering */
if (!(inb(0xd01) & 0x03)) {
outb(0x3d4, 0x33);
outb(0x3d5, inb(0x3d5) & ~0x90);
outb(0x3d4, 0x32);
outb(0x3d5, inb(0x3d5) | 0x04);
outw(0x3d4, 0x0250);
outw(0x3d4, 0x07ba);
outw(0x3d4, 0x0900);
outw(0x3d4, 0x15e7);
outw(0x3d4, 0x2a95);
}
outw(0x3d4, 0x34a0);
break;
#if 0 /* Untested - probably doesn't work */
case(MatroxVendor):
case(DiamondVendor):
puts("VGA Chip Vendor ID: ");
puthex(PCIVendor(slot));
puts("\n");
mdelay(1000);
#endif
};
outw(0x3C4, 0x0120); /* disable video */
setTextRegs(VgaTextRegs); /* initial register setup */
setTextCLUT(0); /* load color lookup table */
loadFont(ISA_mem); /* load font */
setTextRegs(VgaTextRegs); /* reload registers */
outw(0x3C4, 0x0100); /* re-enable video */
clearVideoMemory();
if (PCIVendor(slot) == S3Vendor) {
outb(0x3c2, 0x63); /* MISC */
} /* endif */
#ifdef DEBUG
printslots();
mdelay(5000);
#endif
mdelay(1000); /* give time for the video monitor to come up */
}
return (1); /* 'CRT' I/O supported */
}
/*
* Write to VGA Attribute registers.
*/
void
writeAttr(unsigned char index, unsigned char data, unsigned char videoOn)
{
unsigned char v;
v = inb(0x3da); /* reset attr. address toggle */
if (videoOn)
outb(0x3c0, (index & 0x1F) | 0x20);
else
outb(0x3c0, (index & 0x1F));
outb(0x3c0, data);
}
void
setTextRegs(struct VgaRegs *svp)
{
int i;
/*
* saved settings
*/
while( svp->io_port != ENDMK ) {
outb(svp->io_port, svp->io_index);
outb(svp->io_port+1, svp->io_value);
svp++;
}
outb(0x3c2, 0x67); /* MISC */
outb(0x3c6, 0xff); /* MASK */
for ( i = 0; i < 0x10; i++)
writeAttr(i, AC[i], 0); /* pallete */
writeAttr(0x10, 0x0c, 0); /* text mode */
writeAttr(0x11, 0x00, 0); /* overscan color (border) */
writeAttr(0x12, 0x0f, 0); /* plane enable */
writeAttr(0x13, 0x08, 0); /* pixel panning */
writeAttr(0x14, 0x00, 1); /* color select; video on */
}
void
setTextCLUT(int shift)
{
int i;
outb(0x3C6, 0xFF);
i = inb(0x3C7);
outb(0x3C8, 0);
i = inb(0x3C7);
for ( i = 0; i < 256; i++) {
outb(0x3C9, TextCLUT[i].r << shift);
outb(0x3C9, TextCLUT[i].g << shift);
outb(0x3C9, TextCLUT[i].b << shift);
}
}
void
loadFont(unsigned char *ISA_mem)
{
int i, j;
unsigned char *font_page = (unsigned char *) &ISA_mem[0xA0000];
outb(0x3C2, 0x67);
/*
* Load font
*/
i = inb(0x3DA); /* Reset Attr toggle */
outb(0x3C0,0x30);
outb(0x3C0, 0x01); /* graphics mode */
outw(0x3C4, 0x0001); /* reset sequencer */
outw(0x3C4, 0x0204); /* write to plane 2 */
outw(0x3C4, 0x0406); /* enable plane graphics */
outw(0x3C4, 0x0003); /* reset sequencer */
outw(0x3CE, 0x0402); /* read plane 2 */
outw(0x3CE, 0x0500); /* write mode 0, read mode 0 */
outw(0x3CE, 0x0605); /* set graphics mode */
for (i = 0; i < sizeof(font); i += 16) {
for (j = 0; j < 16; j++) {
__asm__ volatile("eieio");
font_page[(2*i)+j] = font[i+j];
}
}
}
static void
unlockS3(void)
{
int s3_device_id;
outw(0x3d4, 0x3848);
outw(0x3d4, 0x39a5);
outb(0x3d4, 0x2d);
s3_device_id = inb(0x3d5) << 8;
outb(0x3d4, 0x2e);
s3_device_id |= inb(0x3d5);
if (s3_device_id != 0x8812) {
/* From the S3 manual */
outb(0x46E8, 0x10); /* Put into setup mode */
outb(0x3C3, 0x10);
outb(0x102, 0x01); /* Enable registers */
outb(0x46E8, 0x08); /* Enable video */
outb(0x3C3, 0x08);
outb(0x4AE8, 0x00);
#if 0
outb(0x42E8, 0x80); /* Reset graphics engine? */
#endif
outb(0x3D4, 0x38); /* Unlock all registers */
outb(0x3D5, 0x48);
outb(0x3D4, 0x39);
outb(0x3D5, 0xA5);
outb(0x3D4, 0x40);
outb(0x3D5, inb(0x3D5)|0x01);
outb(0x3D4, 0x33);
outb(0x3D5, inb(0x3D5)&~0x52);
outb(0x3D4, 0x35);
outb(0x3D5, inb(0x3D5)&~0x30);
outb(0x3D4, 0x3A);
outb(0x3D5, 0x00);
outb(0x3D4, 0x53);
outb(0x3D5, 0x00);
outb(0x3D4, 0x31);
outb(0x3D5, inb(0x3D5)&~0x4B);
outb(0x3D4, 0x58);
outb(0x3D5, 0);
outb(0x3D4, 0x54);
outb(0x3D5, 0x38);
outb(0x3D4, 0x60);
outb(0x3D5, 0x07);
outb(0x3D4, 0x61);
outb(0x3D5, 0x80);
outb(0x3D4, 0x62);
outb(0x3D5, 0xA1);
outb(0x3D4, 0x69); /* High order bits for cursor address */
outb(0x3D5, 0);
outb(0x3D4, 0x32);
outb(0x3D5, inb(0x3D5)&~0x10);
} else {
outw(0x3c4, 0x0806); /* IBM Portable 860 */
outw(0x3c4, 0x1041);
outw(0x3c4, 0x1128);
outw(0x3d4, 0x4000);
outw(0x3d4, 0x3100);
outw(0x3d4, 0x3a05);
outw(0x3d4, 0x6688);
outw(0x3d4, 0x5800); /* disable linear addressing */
outw(0x3d4, 0x4500); /* disable H/W cursor */
outw(0x3c4, 0x5410); /* enable auto-centering */
outw(0x3c4, 0x561f);
outw(0x3c4, 0x1b80); /* lock DCLK selection */
outw(0x3d4, 0x3900); /* lock S3 registers */
outw(0x3d4, 0x3800);
} /* endif */
}
/*
* cursor() sets an offset (0-1999) into the 80x25 text area.
*/
void
cursor(int x, int y)
{
int pos = (y*cols)+x;
outb(0x3D4, 14);
outb(0x3D5, pos >> 8);
outb(0x3D4, 15);
outb(0x3D5, pos);
}
void
clearVideoMemory(void)
{
int i, j;
for (i = 0; i < lines; i++) {
for (j = 0; j < cols; j++) {
vidmem[((i*cols)+j)*2] = 0x20; /* fill with space character */
vidmem[((i*cols)+j)*2+1] = 0x07; /* set bg & fg attributes */
}
}
}
/* ============ */
#define NSLOTS 8
#define NPCIREGS 5
/*
should use devfunc number/indirect method to be totally safe on
all machines, this works for now on 3 slot Moto boxes
*/
struct PCI_ConfigInfo {
unsigned long * config_addr;
unsigned long regs[NPCIREGS];
} PCI_slots [NSLOTS] = {
{ (unsigned long *)0x80808000, {0xDEADBEEF,} }, /* onboard */
{ (unsigned long *)0x80800800, {0xDEADBEEF,} }, /* onboard */
{ (unsigned long *)0x80801000, {0xDEADBEEF,} }, /* onboard */
{ (unsigned long *)0x80802000, {0xDEADBEEF,} }, /* onboard */
{ (unsigned long *)0x80804000, {0xDEADBEEF,} }, /* onboard */
{ (unsigned long *)0x80810000, {0xDEADBEEF,} }, /* slot A/1 */
{ (unsigned long *)0x80820000, {0xDEADBEEF,} }, /* slot B/2 */
{ (unsigned long *)0x80840000, {0xDEADBEEF,} } /* slot C/3 */
};
/*
* The following code modifies the PCI Command register
* to enable memory and I/O accesses.
*/
void
unlockVideo(int slot)
{
volatile unsigned char * ppci;
ppci = (unsigned char * )PCI_slots[slot].config_addr;
ppci[4] = 0x0003; /* enable memory and I/O accesses */
ppci[0x10] = 0x00000; /* turn off memory mapping */
ppci[0x11] = 0x00000; /* mem_base = 0 */
ppci[0x12] = 0x00000;
ppci[0x13] = 0x00000;
__asm__ volatile("eieio");
outb(0x3d4, 0x11);
outb(0x3d5, 0x0e); /* unlock CR0-CR7 */
}
long
SwapBytes(long lv) /* turn little endian into big indian long */
{
long t;
t = (lv&0x000000FF) << 24;
t |= (lv&0x0000FF00) << 8;
t |= (lv&0x00FF0000) >> 8;
t |= (lv&0xFF000000) >> 24;
return(t);
}
#define DEVID 0
#define CMD 1
#define CLASS 2
#define MEMBASE 4
int
scanPCI(int start_slt)
{
int slt, r;
struct PCI_ConfigInfo *pslot;
int theSlot = -1;
int highVgaSlot = 0;
for ( slt = start_slt + 1; slt < NSLOTS; slt++) {
pslot = &PCI_slots[slt];
for ( r = 0; r < NPCIREGS; r++) {
pslot->regs[r] = SwapBytes ( pslot->config_addr[r] );
}
/* card in slot ? */
if ( pslot->regs[DEVID] != 0xFFFFFFFF ) {
/* VGA ? */
if ( ((pslot->regs[CLASS] & 0xFFFFFF00) == 0x03000000) ||
((pslot->regs[CLASS] & 0xFFFFFF00) == 0x00010000)) {
highVgaSlot = slt;
/* did firmware enable it ? */
if ( (pslot->regs[CMD] & 0x03) ) {
theSlot = slt;
break;
}
}
}
}
return ( theSlot );
}
/* return Vendor ID of card in the slot */
static
int PCIVendor(int slotnum) {
struct PCI_ConfigInfo *pslot;
pslot = &PCI_slots[slotnum];
return (pslot->regs[DEVID] & 0xFFFF);
}
#ifdef DEBUG
static
void printslots(void)
{
int i;
#if 0
struct PCI_ConfigInfo *pslot;
#endif
for(i=0; i < NSLOTS; i++) {
#if 0
pslot = &PCI_slots[i];
printf("Slot: %d, Addr: %x, Vendor: %08x, Class: %08x\n",
i, pslot->config_addr, pslot->regs[0], pslot->regs[2]);
#else
puts("PCI Slot number: "); puthex(i);
puts(" Vendor ID: ");
puthex(PCIVendor(i)); puts("\n");
#endif
}
}
#endif /* DEBUG */
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