ref: 59ed389a6eb7d405eb44d9644d69993e814dccdf
dir: /sys/src/cmd/aux/vga/tvp3025.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "pci.h" #include "vga.h" /* * Tvp3025 Viewpoint Video Interface Pallette. * Assumes hooked up to an S3 Vision964. * The #9GXE64pro uses bit 5 of Crt5C as RS4, * giving access to the Bt485 emulation mode registers. */ static void options(Vga* vga, Ctlr* ctlr) { tvp3020.options(vga, ctlr); } static void init(Vga* vga, Ctlr* ctlr) { /* * Although the Tvp3025 has a higher default * speed-grade (135MHz), just use the 3020 code. */ tvp3020.init(vga, ctlr); } static void load(Vga* vga, Ctlr* ctlr) { uchar crt5c, x; crt5c = vgaxi(Crtx, 0x5C) & ~0x20; vgaxo(Crtx, 0x5C, crt5c); x = tvp3020xi(0x06) & ~0x80; tvp3020xo(0x06, x); tvp3020xo(0x0E, 0x00); (tvp3020.load)(vga, ctlr); if(ctlr->flag & Uenhanced) tvp3020xo(0x29, 0x01); ctlr->flag |= Fload; } static ulong dumpclock(ulong d, ulong n, ulong p) { ulong f; f = RefFreq*((n+2)*8); f /= (d+2); f >>= p; return f; } static void dump(Vga* vga, Ctlr* ctlr) { uchar crt5c; int i; ulong clock[4]; crt5c = vgaxi(Crtx, 0x5C); vgaxo(Crtx, 0x5C, crt5c & ~0x20); tvp3020.dump(vga, ctlr); printitem(ctlr->name, "PCLK"); for(i = 0; i < 4; i++){ tvp3020xo(0x2C, (i<<4)|(i<<2)|i); printreg(clock[i] = tvp3020xi(0x2D)); } Bprint(&stdout, "%23ld\n", dumpclock(clock[0], clock[1], clock[2] & 0x07)); printitem(ctlr->name, "MCLK"); for(i = 0; i < 4; i++){ tvp3020xo(0x2C, (i<<4)|(i<<2)|i); printreg(clock[i] = tvp3020xi(0x2E)); } Bprint(&stdout, "%23ld\n", dumpclock(clock[0], clock[1], clock[2] & 0x07)); printitem(ctlr->name, "RCLK"); for(i = 0; i < 4; i++){ tvp3020xo(0x2C, (i<<4)|(i<<2)|i); printreg(clock[i] = tvp3020xi(0x2F)); } Bprint(&stdout, "%23ld\n", dumpclock(clock[0], clock[1], clock[2] & 0x07)); vgaxo(Crtx, 0x5C, crt5c); } Ctlr tvp3025 = { "tvp3025", /* name */ 0, /* snarf */ options, /* options */ init, /* init */ load, /* load */ dump, /* dump */ };