806353ec9e
Tilting allows using left/right rotated or invetrted display orientation. This can be changed at runtime such as: echo tilt right > /dev/vgactl This removes the old panning and vga overlays as they are only implemented with some ancient vga controllers.
567 lines
11 KiB
C
567 lines
11 KiB
C
#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/pci.h"
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#include "../port/error.h"
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#define Image IMAGE
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#include <draw.h>
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#include <memdraw.h>
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#include <cursor.h>
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#include "screen.h"
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enum {
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PCIS3 = 0x5333, /* PCI VID */
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SAVAGE3D = 0x8A20, /* PCI DID */
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SAVAGE3DMV = 0x8A21,
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SAVAGE4 = 0x8A22,
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PROSAVAGEP = 0x8A25,
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PROSAVAGEK = 0x8A26,
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PROSAVAGE8 = 0x8D04,
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SAVAGEMXMV = 0x8C10,
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SAVAGEMX = 0x8C11,
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SAVAGEIXMV = 0x8C12,
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SAVAGEIX = 0x8C13,
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SUPERSAVAGEIXC16 = 0x8C2E,
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SAVAGE2000 = 0x9102,
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VIRGE = 0x5631,
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VIRGEGX2 = 0x8A10,
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VIRGEDXGX = 0x8A01,
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VIRGEVX = 0x883D,
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VIRGEMX = 0x8C01,
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VIRGEMXP = 0x8C03,
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VIRTUALPC2004 = 0x8810,
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AURORA64VPLUS = 0x8812,
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};
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static int
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s3pageset(VGAscr* scr, int page)
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{
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uchar crt35, crt51;
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int opage;
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crt35 = vgaxi(Crtx, 0x35);
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if(scr->gscreen->depth >= 8){
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/*
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* The S3 registers need to be unlocked for this.
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* Let's hope they are already:
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* vgaxo(Crtx, 0x38, 0x48);
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* vgaxo(Crtx, 0x39, 0xA0);
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*
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* The page is 6 bits, the lower 4 bits in Crt35<3:0>,
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* the upper 2 in Crt51<3:2>.
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*/
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vgaxo(Crtx, 0x35, page & 0x0F);
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crt51 = vgaxi(Crtx, 0x51);
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vgaxo(Crtx, 0x51, (crt51 & ~0x0C)|((page & 0x30)>>2));
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opage = ((crt51 & 0x0C)<<2)|(crt35 & 0x0F);
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}
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else{
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vgaxo(Crtx, 0x35, (page<<2) & 0x0C);
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opage = (crt35>>2) & 0x03;
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}
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return opage;
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}
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static void
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s3page(VGAscr* scr, int page)
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{
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int id;
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id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
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switch(id){
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case VIRGEGX2:
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break;
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default:
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lock(&scr->devlock);
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s3pageset(scr, page);
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unlock(&scr->devlock);
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break;
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}
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}
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static void
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s3linear(VGAscr* scr, int, int)
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{
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uvlong mmiobase;
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ulong mmiosize;
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int id, j;
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Pcidev *p;
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p = scr->pci;
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if(p == nil)
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return;
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vgalinearpci(scr);
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if(scr->paddr)
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addvgaseg("s3screen", scr->paddr, scr->apsize);
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id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
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switch(id){ /* find mmio */
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case SAVAGE4:
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case PROSAVAGEP:
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case PROSAVAGEK:
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case PROSAVAGE8:
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case SUPERSAVAGEIXC16:
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/*
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* We could assume that the MMIO registers
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* will be in the screen segment and just use
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* that, but PCI software is allowed to move them
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* if it feels like it, so we look for an aperture of
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* the right size; only the first 512k actually means
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* anything. The S3 engineers overestimated how
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* much space they would need in the first design.
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*/
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for(j=0; j<nelem(p->mem); j++){
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if((p->mem[j].bar&1) == 0)
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if((p->mem[j].bar&~0x0F) != scr->paddr)
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if(p->mem[j].size==512*1024 || p->mem[j].size==16*1024*1024){
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mmiobase = p->mem[j].bar & ~0x0F;
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mmiosize = 512*1024;
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scr->mmio = vmap(mmiobase, mmiosize);
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if(scr->mmio == nil)
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return;
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addvgaseg("savagemmio", mmiobase, mmiosize);
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break;
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}
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}
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}
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}
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static void
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s3vsyncactive(void)
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{
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/*
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* Hardware cursor information is fetched from display memory
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* during the horizontal blank active time. The 80x chips may hang
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* if the cursor is turned on or off during this period.
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*/
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while((vgai(Status1) & 0x08) == 0)
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;
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}
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static void
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s3disable(VGAscr*)
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{
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uchar crt45;
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/*
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* Turn cursor off.
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*/
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crt45 = vgaxi(Crtx, 0x45) & 0xFE;
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s3vsyncactive();
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vgaxo(Crtx, 0x45, crt45);
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}
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static void
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s3load(VGAscr* scr, Cursor* curs)
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{
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uchar *p;
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int id, dolock, opage, x, y;
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/*
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* Disable the cursor and
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* set the pointer to the two planes.
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*/
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s3disable(scr);
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opage = 0;
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p = scr->vaddr;
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id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
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switch(id){
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case VIRTUALPC2004:
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case VIRGE:
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case VIRGEDXGX:
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case VIRGEGX2:
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case VIRGEVX:
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case SAVAGEMXMV:
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case SAVAGEIXMV:
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case SAVAGE4:
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case PROSAVAGEP:
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case PROSAVAGEK:
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case PROSAVAGE8:
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case SUPERSAVAGEIXC16:
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dolock = 0;
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p += scr->storage;
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break;
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default:
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dolock = 1;
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lock(&scr->devlock);
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opage = s3pageset(scr, scr->storage>>16);
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p += (scr->storage & 0xFFFF);
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break;
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}
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/*
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* The cursor is set in Microsoft Windows format (the ViRGE/GX2 doesn't
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* support the X11 format) which gives the following truth table:
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* and xor colour
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* 0 0 background colour
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* 0 1 foreground colour
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* 1 0 current screen pixel
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* 1 1 NOT current screen pixel
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* Put the cursor into the top-left of the 64x64 array.
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*
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* The cursor pattern in memory is interleaved words of
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* AND and XOR patterns.
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*/
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for(y = 0; y < 64; y++){
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for(x = 0; x < 64/8; x += 2){
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if(x < 16/8 && y < 16){
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*p++ = ~(curs->clr[2*y + x]|curs->set[2*y + x]);
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*p++ = ~(curs->clr[2*y + x+1]|curs->set[2*y + x+1]);
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*p++ = curs->set[2*y + x];
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*p++ = curs->set[2*y + x+1];
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}
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else {
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*p++ = 0xFF;
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*p++ = 0xFF;
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*p++ = 0x00;
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*p++ = 0x00;
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}
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}
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}
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if(dolock){
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s3pageset(scr, opage);
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unlock(&scr->devlock);
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}
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/*
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* Save the cursor hotpoint and enable the cursor.
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*/
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scr->offset = curs->offset;
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s3vsyncactive();
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vgaxo(Crtx, 0x45, 0x01);
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}
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static int
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s3move(VGAscr* scr, Point p)
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{
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int x, xo, y, yo;
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/*
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* Mustn't position the cursor offscreen even partially,
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* or it disappears. Therefore, if x or y is -ve, adjust the
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* cursor offset instead.
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* There seems to be a bug in that if the offset is 1, the
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* cursor doesn't disappear off the left edge properly, so
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* round it up to be even.
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*/
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if((x = p.x+scr->offset.x) < 0){
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xo = -x;
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xo = ((xo+1)/2)*2;
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x = 0;
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}
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else
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xo = 0;
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if((y = p.y+scr->offset.y) < 0){
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yo = -y;
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y = 0;
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}
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else
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yo = 0;
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vgaxo(Crtx, 0x46, (x>>8) & 0x07);
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vgaxo(Crtx, 0x47, x & 0xFF);
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vgaxo(Crtx, 0x49, y & 0xFF);
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vgaxo(Crtx, 0x4E, xo);
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vgaxo(Crtx, 0x4F, yo);
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vgaxo(Crtx, 0x48, (y>>8) & 0x07);
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return 0;
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}
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static void
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s3enable(VGAscr* scr)
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{
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int i;
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ulong storage;
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s3disable(scr);
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/*
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* Cursor colours. Set both the CR0[EF] and the colour
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* stack in case we are using a 16-bit RAMDAC.
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*/
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vgaxo(Crtx, 0x0E, Pwhite);
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vgaxo(Crtx, 0x0F, Pblack);
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vgaxi(Crtx, 0x45);
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for(i = 0; i < 3; i++)
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vgaxo(Crtx, 0x4A, Pblack);
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vgaxi(Crtx, 0x45);
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for(i = 0; i < 3; i++)
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vgaxo(Crtx, 0x4B, Pwhite);
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/*
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* Find a place for the cursor data in display memory.
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* Must be on a 1024-byte boundary.
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*/
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storage = (scr->pitch*scr->height+1023)/1024;
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vgaxo(Crtx, 0x4C, storage>>8);
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vgaxo(Crtx, 0x4D, storage & 0xFF);
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storage *= 1024;
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scr->storage = storage;
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/*
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* Load, locate and enable the cursor
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* in Microsoft Windows format.
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*/
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s3load(scr, &cursor);
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s3move(scr, ZP);
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vgaxo(Crtx, 0x55, vgaxi(Crtx, 0x55) & ~0x10);
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s3vsyncactive();
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vgaxo(Crtx, 0x45, 0x01);
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}
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/*
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* The manual gives byte offsets, but we want ulong offsets, hence /4.
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*/
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enum {
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SrcBase = 0xA4D4/4,
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DstBase = 0xA4D8/4,
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Stride = 0xA4E4/4,
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FgrdData = 0xA4F4/4,
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WidthHeight = 0xA504/4,
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SrcXY = 0xA508/4,
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DestXY = 0xA50C/4,
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Command = 0xA500/4,
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SubStat = 0x8504/4,
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FifoStat = 0x850C/4,
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};
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/*
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* Wait for writes to VGA memory via linear aperture to flush.
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*/
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enum {Maxloop = 1<<24};
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struct {
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ulong linear;
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ulong fifo;
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ulong idle;
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ulong lineartimeout;
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ulong fifotimeout;
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ulong idletimeout;
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} waitcount;
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static void
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waitforlinearfifo(VGAscr *scr)
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{
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ulong *mmio;
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long x;
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static ulong nwaitforlinearfifo;
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ulong mask, val;
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switch(scr->id){
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default:
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panic("unknown scr->id in s3 waitforlinearfifo");
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case 0x8A01: /* ViRGE/[DG]X. XFree86 says no waiting necessary */
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return;
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case 0x5631: /* ViRGE */
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case 0x883D: /* ViRGE/VX */
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mask = 0x0F<<6;
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val = 0x08<<6;
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break;
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case 0x8A10: /* ViRGE/GX2 */
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mask = 0x1F<<6;
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val = 0x10<<6;
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break;
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}
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mmio = scr->mmio;
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x = 0;
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while((mmio[FifoStat]&mask) != val && x++ < Maxloop)
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waitcount.linear++;
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if(x >= Maxloop)
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waitcount.lineartimeout++;
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}
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static void
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waitforfifo(VGAscr *scr, int entries)
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{
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ulong *mmio;
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long x;
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static ulong nwaitforfifo;
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mmio = scr->mmio;
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x = 0;
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while((mmio[SubStat]&0x1F00) < ((entries+2)<<8) && x++ < Maxloop)
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waitcount.fifo++;
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if(x >= Maxloop)
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waitcount.fifotimeout++;
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}
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static void
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waitforidle(VGAscr *scr)
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{
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ulong *mmio;
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long x;
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mmio = scr->mmio;
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x = 0;
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while((mmio[SubStat]&0x3F00) != 0x3000 && x++ < Maxloop)
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waitcount.idle++;
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if(x >= Maxloop)
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waitcount.idletimeout++;
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}
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static int
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hwscroll(VGAscr *scr, Rectangle r, Rectangle sr)
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{
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enum { Bitbltop = 0xCC }; /* copy source */
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ulong *mmio;
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ulong cmd;
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Point dp, sp;
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int did;
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did = (scr->gscreen->depth-8)/8;
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cmd = 0x00000020|(Bitbltop<<17)|(did<<2);
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if(r.min.x <= sr.min.x){
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cmd |= 1<<25;
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dp.x = r.min.x;
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sp.x = sr.min.x;
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}else{
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dp.x = r.max.x-1;
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sp.x = sr.max.x-1;
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}
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if(r.min.y <= sr.min.y){
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cmd |= 1<<26;
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dp.y = r.min.y;
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sp.y = sr.min.y;
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}else{
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dp.y = r.max.y-1;
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sp.y = sr.max.y-1;
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}
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mmio = scr->mmio;
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waitforlinearfifo(scr);
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waitforfifo(scr, 7);
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mmio[SrcBase] = scr->paddr;
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mmio[DstBase] = scr->paddr;
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mmio[Stride] = (scr->pitch<<16)|scr->pitch;
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mmio[WidthHeight] = ((Dx(r)-1)<<16)|Dy(r);
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mmio[SrcXY] = (sp.x<<16)|sp.y;
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mmio[DestXY] = (dp.x<<16)|dp.y;
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mmio[Command] = cmd;
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waitforidle(scr);
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return 1;
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}
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static int
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hwfill(VGAscr *scr, Rectangle r, ulong sval)
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{
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enum { Bitbltop = 0xCC }; /* copy source */
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ulong *mmio;
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ulong cmd;
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int did;
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did = (scr->gscreen->depth-8)/8;
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cmd = 0x16000120|(Bitbltop<<17)|(did<<2);
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mmio = scr->mmio;
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waitforlinearfifo(scr);
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waitforfifo(scr, 8);
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mmio[SrcBase] = scr->paddr;
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mmio[DstBase] = scr->paddr;
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mmio[DstBase] = scr->paddr;
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mmio[Stride] = (scr->pitch<<16)|scr->pitch;
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mmio[FgrdData] = sval;
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mmio[WidthHeight] = ((Dx(r)-1)<<16)|Dy(r);
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mmio[DestXY] = (r.min.x<<16)|r.min.y;
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mmio[Command] = cmd;
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waitforidle(scr);
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return 1;
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}
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enum {
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CursorSyncCtl = 0x0D, /* in Seqx */
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VsyncHi = 0x80,
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VsyncLo = 0x40,
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HsyncHi = 0x20,
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HsyncLo = 0x10,
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};
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static void
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s3blank(VGAscr*, int blank)
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{
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uchar x;
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x = vgaxi(Seqx, CursorSyncCtl);
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x &= ~0xF0;
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if(blank)
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x |= VsyncLo | HsyncLo;
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vgaxo(Seqx, CursorSyncCtl, x);
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}
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static void
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s3drawinit(VGAscr *scr)
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{
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extern void savageinit(VGAscr*); /* vgasavage.c */
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ulong id;
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id = (vgaxi(Crtx, 0x2D)<<8)|vgaxi(Crtx, 0x2E);
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scr->id = id;
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/*
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* It's highly likely that other ViRGEs will work without
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* change to the driver, with the exception of the size of
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* the linear aperture memory write FIFO. Since we don't
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* know that size, I'm not turning them on. See waitforlinearfifo
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* above.
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*/
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scr->blank = s3blank;
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switch(id){
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case VIRGE:
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case VIRGEVX:
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case VIRGEGX2:
|
|
scr->mmio = (ulong*)((char*)scr->vaddr+0x1000000);
|
|
scr->fill = hwfill;
|
|
scr->scroll = hwscroll;
|
|
break;
|
|
case SAVAGEMXMV:
|
|
case SAVAGEIXMV:
|
|
scr->mmio = (ulong*)((char*)scr->vaddr+0x1000000);
|
|
savageinit(scr);
|
|
break;
|
|
case SUPERSAVAGEIXC16:
|
|
case SAVAGE4:
|
|
case PROSAVAGEP:
|
|
case PROSAVAGE8:
|
|
case PROSAVAGEK:
|
|
/* scr->mmio is set by s3linear */
|
|
savageinit(scr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
VGAdev vgas3dev = {
|
|
"s3",
|
|
|
|
0,
|
|
0,
|
|
s3page,
|
|
s3linear,
|
|
s3drawinit,
|
|
};
|
|
|
|
VGAcur vgas3cur = {
|
|
"s3hwgc",
|
|
|
|
s3enable,
|
|
s3disable,
|
|
s3load,
|
|
s3move,
|
|
};
|
|
|