141480Smckusick /* 241480Smckusick * Copyright (c) 1988 University of Utah. 341480Smckusick * Copyright (c) 1990 The Regents of the University of California. 441480Smckusick * All rights reserved. 541480Smckusick * 641480Smckusick * This code is derived from software contributed to Berkeley by 741480Smckusick * the Systems Programming Group of the University of Utah Computer 841480Smckusick * Science Department. 941480Smckusick * 1041480Smckusick * %sccs.include.redist.c% 1141480Smckusick * 1241480Smckusick * from: Utah $Hdr: grf_tc.c 1.13 89/08/25$ 1341480Smckusick * 14*45788Sbostic * @(#)grf_tc.c 7.3 (Berkeley) 12/16/90 1541480Smckusick */ 1641480Smckusick 1741480Smckusick #include "grf.h" 1841480Smckusick #if NGRF > 0 1941480Smckusick 2041480Smckusick /* 2141480Smckusick * Graphics routines for TOPCAT frame buffer 2241480Smckusick */ 23*45788Sbostic #include "sys/param.h" 24*45788Sbostic #include "sys/errno.h" 2541480Smckusick 2641480Smckusick #include "grfioctl.h" 2741480Smckusick #include "grfvar.h" 2841480Smckusick #include "grf_tcreg.h" 2941480Smckusick 30*45788Sbostic #include "../include/cpu.h" 3141480Smckusick 3241480Smckusick /* 3341480Smckusick * Initialize hardware. 3441480Smckusick * Must fill in the grfinfo structure in g_softc. 3541480Smckusick * Returns 0 if hardware not present, non-zero ow. 3641480Smckusick */ 3741480Smckusick tc_init(gp, addr) 3841480Smckusick struct grf_softc *gp; 3941480Smckusick u_char *addr; 4041480Smckusick { 4141480Smckusick register struct tcboxfb *tp = (struct tcboxfb *) addr; 4241480Smckusick struct grfinfo *gi = &gp->g_display; 4341480Smckusick volatile u_char *fbp; 4441480Smckusick u_char save; 4541480Smckusick int fboff; 4641480Smckusick 4741480Smckusick gi->gd_regaddr = (caddr_t) UNIOV(addr); 4841480Smckusick gi->gd_regsize = 0x10000; 4941480Smckusick gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb; 5041480Smckusick gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb; 5141480Smckusick fboff = (tp->fbomsb << 8) | tp->fbolsb; 5241480Smckusick gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16); 5341480Smckusick gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; 5441480Smckusick gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb; 5541480Smckusick gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb; 5641480Smckusick gi->gd_planes = tp->num_planes; 5741480Smckusick gi->gd_colors = 1 << gi->gd_planes; 5841480Smckusick if (gi->gd_colors == 1) { 5941480Smckusick fbp = (u_char *) IOV(gi->gd_fbaddr); 6041480Smckusick tp->wen = ~0; 6141480Smckusick tp->prr = 0x3; 6241480Smckusick tp->fben = ~0; 6341480Smckusick save = *fbp; 6441480Smckusick *fbp = 0xFF; 6541480Smckusick gi->gd_colors = *fbp + 1; 6641480Smckusick *fbp = save; 6741480Smckusick } 6841480Smckusick return(1); 6941480Smckusick } 7041480Smckusick 7141480Smckusick /* 7241480Smckusick * Change the mode of the display. 7341480Smckusick * Right now all we can do is grfon/grfoff. 7441480Smckusick * Return a UNIX error number or 0 for success. 7541480Smckusick * Function may not be needed anymore. 7641480Smckusick */ 7741480Smckusick /*ARGSUSED*/ 7841480Smckusick tc_mode(gp, cmd) 7941480Smckusick struct grf_softc *gp; 8041480Smckusick { 8141480Smckusick int error = 0; 8241480Smckusick 8341480Smckusick switch (cmd) { 8441480Smckusick case GM_GRFON: 8541480Smckusick case GM_GRFOFF: 8641480Smckusick break; 8741480Smckusick default: 8841480Smckusick error = EINVAL; 8941480Smckusick break; 9041480Smckusick } 9141480Smckusick return(error); 9241480Smckusick } 9341480Smckusick #endif 94