vreset.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:18k
- /*
- * BK Id: SCCS/s.vreset.c 1.13 01/11/02 10:46:08 trini
- */
- /*
- * 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 void inline
- 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 moden");
- 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: %08xn",
- 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 */