/* * 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 * Adapted for Moto boxes by: * Pat Kane & Mark Scott, 1996 * Adapted for IBM portables by: * Takeshi Ishimoto * Multi-console support: * Terje Malmedal */ #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); /* palette */ 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 */