/* $XFree86: xc/programs/Xserver/hw/xfree86/vga256/drivers/al2101/al_driver.c,v 3.6 1995/01/10 10:30:06 dawes Exp $ */ /* * Copyright 1994 by Paolo Severini, Italy. * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Paolo Severini not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Paolo Severini makes no representations * about the suitability of this software for any purpose. It is provided * "as is" without express or implied warranty. * * PAOLO SEVERINI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL PAOLO SEVERINI BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. * * Author: Paolo Severini, lendl@dist.dist.unige.it * */ #include "X.h" #include "input.h" #include "screenint.h" #include "compiler.h" #include "xf86.h" #include "xf86Priv.h" #include "xf86_OSlib.h" #include "xf86_HWlib.h" #include "vga.h" typedef struct { vgaHWRec std; /* good old IBM VGA */ unsigned char ExtFuncReg1; unsigned char ExtCRTCreg1; unsigned char AbilReadBank; unsigned char ReadBank; unsigned char WriteBank; } vgaAL2101Rec, *vgaAL2101Ptr; static Bool AL2101Probe(); static char * AL2101Ident(); static Bool AL2101ClockSelect(); static void AL2101EnterLeave(); static Bool AL2101Init(); static Bool AL2101ValidMode(); static void * AL2101Save(); static void AL2101Restore(); static void AL2101Adjust(); extern void AL2101SetRead(); extern void AL2101SetWrite(); extern void AL2101SetReadWrite(); vgaVideoChipRec AL2101 = { AL2101Probe, AL2101Ident, AL2101EnterLeave, AL2101Init, AL2101ValidMode, AL2101Save, AL2101Restore, AL2101Adjust, (void (*)())NoopDDA, (void (*)())NoopDDA, (void (*)())NoopDDA, AL2101SetRead, AL2101SetWrite, AL2101SetReadWrite, 0x10000, 0x10000, 16, 0xFFFF, 0x00000, 0x10000, 0x00000, 0x10000, TRUE, /* Uses 2 banks */ VGA_NO_DIVIDE_VERT, {0,}, 8, FALSE, 0, 0, FALSE, FALSE, NULL, 1, }; #define new ((vgaAL2101Ptr)vgaNewVideoState) static unsigned AL2101_IOPorts[] = { 0x3D6, 0x3D7 }; /* * AL2101ClockSelect -- * select one of the possible clocks ... */ static Bool AL2101ClockSelect(no) int no; { static unsigned char save1, save2; unsigned char temp; switch(no) { case CLK_REG_SAVE: save1 = inb(0x3CC); outb(0x3CE, 0x0C); save2 = inb(0x3CF); break; case CLK_REG_RESTORE: outb(0x3C2, save1); outw(0x3CE, 0x0C | (save2 << 8)); break; default: temp = inb(0x3CC); outb(0x3C2, ( temp & 0xf3) | ((no << 2) & 0x0C)); outb(0x3CE, 0x0C); temp = inb(0x3CF); outw(0x3CE, 0x0C | (( (temp & 0xDF) | ((no & 0x04)<<3)) <<8) ); } return(TRUE); } /* * AL2101Ident -- */ static char * AL2101Ident(n) int n; { static char *chipsets[] = {"al2101"}; if (n + 1 > sizeof(chipsets) / sizeof(char *)) return(NULL); else return(chipsets[n]); } /* * AL2101Probe -- * check up whether a Al2101 based board is installed */ static Bool AL2101Probe() { unsigned char tmp, tmp2, tmp3; /* * Set up I/O ports to be used by this card */ xf86ClearIOPortList(vga256InfoRec.scrnIndex); xf86AddIOPorts(vga256InfoRec.scrnIndex, Num_VGA_IOPorts, VGA_IOPorts); xf86AddIOPorts(vga256InfoRec.scrnIndex, sizeof(AL2101_IOPorts) / sizeof(AL2101_IOPorts[0]), AL2101_IOPorts); if (vga256InfoRec.chipset) { if (StrCaseCmp(vga256InfoRec.chipset, AL2101Ident(0))) return (FALSE); else AL2101EnterLeave(ENTER); } else { AL2101EnterLeave(ENTER); outb(vgaIOBase + 4, 0x1A); tmp= inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp & 0xE0); /* disable extensions */ outb(vgaIOBase + 4, 0x19); tmp2=inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp2^0xFF); tmp3=inb(vgaIOBase + 5); if (tmp3 != (tmp2 ^ 0xFF)) { outw(vgaIOBase + 4, ((tmp|0x10)<<8) | 0x1A); outb(vgaIOBase + 4, 0x19); tmp2=inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp2^0xFF); tmp3=inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp2); if (tmp3 == (tmp2 ^ 0xFF)) { outb(vgaIOBase + 4, 0x1A); tmp2=inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp2^0x3F); tmp3=inb(vgaIOBase + 5); outb(vgaIOBase + 5, tmp2); if (tmp3 == (tmp2 ^ 0x3F)) { if (!vga256InfoRec.videoRam) vga256InfoRec.videoRam = 1024; if (!vga256InfoRec.clocks) vgaGetClocks(8, AL2101ClockSelect); vga256InfoRec.chipset = AL2101Ident(0); vga256InfoRec.bankedMono = FALSE; return(TRUE); } } } outw(vgaIOBase + 4, (tmp<<8) | 0x1A); AL2101EnterLeave(LEAVE); return(FALSE); } if (!vga256InfoRec.videoRam) vga256InfoRec.videoRam = 1024; if (!vga256InfoRec.clocks) vgaGetClocks(8, AL2101ClockSelect); vga256InfoRec.chipset = AL2101Ident(0); vga256InfoRec.bankedMono = FALSE; return(TRUE); } /* * AL2101EnterLeave -- * enable/disable io-mapping */ static void AL2101EnterLeave(enter) Bool enter; { unsigned char temp; if (enter) { xf86EnableIOPorts(vga256InfoRec.scrnIndex); vgaIOBase = (inb(0x3CC) & 0x01) ? 0x3D0 : 0x3B0; outb(vgaIOBase + 4, 0x1A); temp = inb(vgaIOBase + 5); outb(vgaIOBase + 5, temp | 0x10); } else { xf86DisableIOPorts(vga256InfoRec.scrnIndex); } } /* * AL2101Restore -- * restore a video mode */ static void AL2101Restore(restore) vgaAL2101Ptr restore; { outb(0x3D6,0x00);outb(0x3D7,0x00); outw(0x3CE, (restore->AbilReadBank << 8) | 0x0F); outb(0x3D6, restore->ReadBank); outb(0x3D7, restore->WriteBank); outw(0x3CE, (restore->ExtFuncReg1 << 8) | 0x0C); outw(vgaIOBase + 4, (restore->ExtCRTCreg1 << 8) | 0x19); vgaHWRestore((vgaHWPtr)restore); outw(0x3C4, 0x0300); /* now reenable the timing sequencer */ } /* * AL2101Save -- * save the current video mode */ static void * AL2101Save(save) vgaAL2101Ptr save; { unsigned char tmp1, tmp2, tmp3; tmp1 = inb(0x3D6); tmp2 = inb(0x3D7); outb(0x3CE,0x0F); tmp3=inb(0x3CF); save = (vgaAL2101Ptr)vgaHWSave((vgaHWPtr)save, sizeof(vgaAL2101Rec)); save->ReadBank = tmp1; save->WriteBank = tmp2; save->AbilReadBank = tmp3; outb(0x3D6,0x00);outb(0x3D7,0x00); /*segment select*/ outb(vgaIOBase + 4, 0x19); save->ExtCRTCreg1 = inb(vgaIOBase + 5); outb(0x3CE,0x0C); save->ExtFuncReg1 = inb(0x3CF); return ((void *) save); } /* * AL2101Init -- * Handle the initialization, etc. of a screen. */ static Bool AL2101Init(mode) DisplayModePtr mode; { if (!vgaHWInit(mode,sizeof(vgaAL2101Rec))) return(FALSE); new->ExtFuncReg1 = 0x10; new->ExtCRTCreg1 = 0x12; new->AbilReadBank = 0x04; new->ReadBank = 0x00; new->WriteBank = 0x00; new->std.CRTC[5] |= 0x60; /* Hsync skew */ new->std.CRTC[19] = vga256InfoRec.virtualX >> 4; return(TRUE); } /* * AL2101Adjust -- * adjust the current video frame to display the mousecursor */ static void AL2101Adjust(x, y) int x, y; { int Base = (y * vga256InfoRec.displayWidth + x) >> 3; outw(vgaIOBase + 4, (Base & 0x00FF00) | 0x0C); outw(vgaIOBase + 4, ((Base & 0x00FF) << 8) | 0x0D); outw(vgaIOBase + 4, ((Base & 0x070000) >> 8) | 0x20); } /* * AL2101ValidMode -- * */ static Bool AL2101ValidMode(mode) DisplayModePtr mode; { return TRUE; }