ref: 8f1eb1ac77640d9cd189c49fe48af8cde65eceb1
dir: /sys/src/9/pc/vga3dfx.c/
#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" #include "../port/error.h" #define Image IMAGE #include <draw.h> #include <memdraw.h> #include <cursor.h> #include "screen.h" typedef struct Cursor3dfx Cursor3dfx; struct Cursor3dfx { int vidProcCfg; int hwCurPatAddr; int hwCurLoc; int hwCurC0; int hwCurC1; }; enum { dramInit0 = 0x18, dramInit1 = 0x1C, hwCur = 0x5C, }; static void tdfxenable(VGAscr* scr) { Pcidev *p; int i, *mmio; if(scr->mmio) return; p = scr->pci; if(p == nil || p->vid != 0x121A) return; scr->mmio = vmap(p->mem[0].bar&~0x0F, p->mem[0].size); if(scr->mmio == nil) return; addvgaseg("3dfxmmio", p->mem[0].bar&~0x0F, p->mem[0].size); vgalinearpci(scr); if(scr->apsize) addvgaseg("3dfxscreen", scr->paddr, scr->apsize); /* * Find a place for the cursor data in display memory. * If SDRAM then there's 16MB memory else it's SGRAM * and can count it based on the power-on straps - * chip size can be 8Mb or 16Mb, and there can be 4 or * 8 of them. * Use the last 1KB of the framebuffer. */ mmio = (void*)((uchar*)scr->mmio+dramInit0); if(*(mmio+1) & 0x40000000) i = 16*1024*1024; else{ if(*mmio & 0x08000000) i = 16*1024*1024/8; else i = 8*1024*1024/8; if(*mmio & 0x04000000) i *= 8; else i *= 4; } scr->storage = i - 1024; } static void tdfxcurdisable(VGAscr* scr) { Cursor3dfx *cursor3dfx; if(scr->mmio == 0) return; cursor3dfx = (void*)((uchar*)scr->mmio+hwCur); cursor3dfx->vidProcCfg &= ~0x08000000; } static void tdfxcurload(VGAscr* scr, Cursor* curs) { int y; uchar *p; Cursor3dfx *cursor3dfx; if(scr->mmio == 0) return; cursor3dfx = (void*)((uchar*)scr->mmio+hwCur); /* * Disable the cursor then load the new image in * the top-left of the 64x64 array. * The cursor data is stored in memory as 128-bit * words consisting of plane 0 in the least significant 64-bits * and plane 1 in the most significant. * The X11 cursor truth table is: * p0 p1 colour * 0 0 transparent * 0 1 transparent * 1 0 hwCurC0 * 1 1 hwCurC1 * Unused portions of the image have been initialised to be * transparent. */ cursor3dfx->vidProcCfg &= ~0x08000000; p = (uchar*)scr->vaddr + scr->storage; for(y = 0; y < 16; y++){ *p++ = curs->clr[2*y]|curs->set[2*y]; *p++ = curs->clr[2*y+1]|curs->set[2*y+1]; p += 6; *p++ = curs->set[2*y]; *p++ = curs->set[2*y+1]; p += 6; } /* * Save the cursor hotpoint and enable the cursor. * The 0,0 cursor point is bottom-right. */ scr->offset.x = 63+curs->offset.x; scr->offset.y = 63+curs->offset.y; cursor3dfx->vidProcCfg |= 0x08000000; } static int tdfxcurmove(VGAscr* scr, Point p) { Cursor3dfx *cursor3dfx; if(scr->mmio == 0) return 1; cursor3dfx = (void*)((uchar*)scr->mmio+hwCur); cursor3dfx->hwCurLoc = ((p.y+scr->offset.y)<<16)|(p.x+scr->offset.x); return 0; } static void tdfxcurenable(VGAscr* scr) { Cursor3dfx *cursor3dfx; tdfxenable(scr); if(scr->mmio == 0) return; cursor3dfx = (void*)((uchar*)scr->mmio+hwCur); /* * Cursor colours. */ cursor3dfx->hwCurC0 = 0xFFFFFFFF; cursor3dfx->hwCurC1 = 0x00000000; /* * Initialise the 64x64 cursor to be transparent (X11 mode). */ cursor3dfx->hwCurPatAddr = scr->storage; memset((uchar*)scr->vaddr + scr->storage, 0, 64*16); /* * Load, locate and enable the 64x64 cursor in X11 mode. */ tdfxcurload(scr, &arrow); tdfxcurmove(scr, ZP); cursor3dfx->vidProcCfg |= 0x08000002; } VGAdev vga3dfxdev = { "3dfx", tdfxenable, nil, nil, nil, }; VGAcur vga3dfxcur = { "3dfxhwgc", tdfxcurenable, tdfxcurdisable, tdfxcurload, tdfxcurmove, };