/* $Id: vreset.c,v 1.1 1998/01/16 04:18:06 sakamoto Exp $ */ /* * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org) * All rights reserved. * * 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 * Adapted for Moto boxes by: * Pat Kane & Mark Scott, 1996 * Fixed for IBM/PowerStack II Pat Kane 1997 * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Gary Thomas. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifdef CONS_VGA #ifndef lint static char rcsid[] = "vreset.c 2.0 1997 kane PEK'97 Exp $"; #endif #include "iso_font.h" /* * VGA Register */ struct VgaRegs { unsigned short io_port; unsigned char io_index; unsigned char io_value; }; /* * 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 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 VgaRegs S3TextRegs[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(void); static int PCIVendor(int); static void printslots(void); int delayLoop(int); void unlockS3(); void puthex(unsigned long val) { printf("%08X ", val); } void puts(const char *s) { printf("%s", s); } static inline outw(int port, unsigned short val) { outb(port, val >> 8); outb(port+1, val); } 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) return; /* If no VGA responding in text mode, then we have some work to do... */ slot = scanPCI(); /* find video card in use */ enablePCIvideo(slot); /* enable I/O to card */ /* * Note: the PCI scanning code does not yet work correctly * for non-Moto boxes, so the switch below only * defaults to using an S3 card if it does not * find a Cirrus card. * * The only reason we need to scan the bus looking for * a graphics card is so we could do the "enablePCIvideo(slot)" * call above; it is needed because Moto's OpenFirmware * disables I/O to the graphics adapter before it gives * us control. PEK'97 */ switch (PCIVendor(slot)) { default: /* Assume S3 */ /* case(S3Vendor): */ unlockS3(); VgaTextRegs = S3TextRegs; outw(0x3C4, 0x0120); /* disable video */ setTextRegs(VgaTextRegs); /* initial register setup */ setTextCLUT(); /* load color lookup table */ loadFont(ISA_mem); /* load font */ setTextRegs(VgaTextRegs); /* reload registers */ outw(0x3C4, 0x0100); /* re-enable video */ outb(0x3c2, 0x63); /* MISC */ outb(0x3c2, 0x67); /* MISC */ break; case(CirrusVendor): VgaTextRegs = GenVgaTextRegs; outw(0x3C4, 0x0612); /* unlock ext regs */ outw(0x3C4, 0x0700); /* reset ext sequence mode */ outw(0x3C4, 0x0120); /* disable video */ setTextRegs(VgaTextRegs); /* initial register setup */ setTextCLUT(); /* load color lookup table */ loadFont(ISA_mem); /* load font */ setTextRegs(VgaTextRegs); /* reload registers */ outw(0x3C4, 0x0100); /* re-enable video */ outb(0x3c2, 0x63); /* MISC */ break; case (DiamondVendor): case (MatroxVendor): /* * The following code is almost enuf to get the Matrox * working (on a Moto box) but the video is not stable. * We probably need to tweak the TVP3026 Video PLL regs. PEK'97 */ VgaTextRegs=GenVgaTextRegs; outw(0x3C4, 0x0120); /* disable video */ setTextRegs(VgaTextRegs); /* initial register setup */ setTextCLUT(); /* load color lookup table */ loadFont(ISA_mem); /* load font */ setTextRegs(VgaTextRegs); /* reload registers */ outw(0x3C4, 0x0100); /* re-enable video */ outb(0x3c2, 0x63); /* MISC */ puts("VGA Chip Vendor ID: "); puthex(PCIVendor(slot)); puts("\n"); delayLoop(1); break; }; #ifdef DEBUG printslots(); delayLoop(5); #endif delayLoop(2); /* give time for the video monitor to come up */ } static int NOP(int x) { } /* * Write to VGA Attribute registers. */ writeAttr(index, data, videoOn) unsigned char index; unsigned char data; unsigned char videoOn; /* video on flag */ { 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); } 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 */ } setTextCLUT() { 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); outb(0x3C9, TextCLUT[i].g); outb(0x3C9, TextCLUT[i].b); } } 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]; } } } void unlockS3() { /* 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); outb(0x42E8, 0x80); /* Reset graphics engine? */ 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); } /* ============ */ #define NSLOTS 4 #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, { 0xDE, 0xAD, 0xBE, 0xEF } }, /* onboard */ { (unsigned long *)0x80810000, { 0xDE, 0xAD, 0xBE, 0xEF } }, /* slot A/1 */ { (unsigned long *)0x80820000, { 0xDE, 0xAD, 0xBE, 0xEF } }, /* slot B/2 */ { (unsigned long *)0x80840000, { 0xDE, 0xAD, 0xBE, 0xEF } } /* slot C/3 */ }; /* * The following code modifies the PCI Command register * to enable memory and I/O accesses. */ enablePCIvideo(slot) { volatile unsigned char * ppci; ppci = (unsigned char * )PCI_slots[slot].config_addr; ppci[4] = 0x0003; /* enable memory and I/O accesses */ __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(void) { int slt, r; struct PCI_ConfigInfo *pslot; int theSlot = -1; int highVgaSlot = -1; for ( slt = 0; slt < NSLOTS; slt++) { pslot = &PCI_slots[slt]; for ( r = 0; r < NPCIREGS; r++) { pslot->regs[r] = SwapBytes ( pslot->config_addr[r] ); } if ( pslot->regs[DEVID] != 0xFFFFFFFF ) { /* card in slot ? */ if ( (pslot->regs[CLASS] & 0xFFFFFF00) == 0x03000000 ) { /* VGA ? */ highVgaSlot = slt; if ( (pslot->regs[CMD] & 0x03) ) { /* did firmware enable it ? */ theSlot = slt; } } } } if ( theSlot == -1 ) theSlot = highVgaSlot; return ( theSlot ); } int delayLoop(int k) { volatile int a, b; volatile int i, j; a = 0; do { for ( i = 0; i < 500; i++) { b = i; for ( j = 0; j < 200; j++) { a = b+j; } } } while (k--); return(a); } /* 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); } static void printslots(void) { int i; for(i=0; i < NSLOTS; i++) { puts("PCI Slot number: "); puthex(i); puts(" Vendor ID: "); puthex(PCIVendor(i)); puts("\n"); } } #endif /* CONS_VGA */