1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * %sccs.include.redist.c% 11 * 12 * from: Utah $Hdr: grf_tc.c 1.13 89/08/25$ 13 * 14 * @(#)grf_tc.c 7.3 (Berkeley) 12/16/90 15 */ 16 17 #include "grf.h" 18 #if NGRF > 0 19 20 /* 21 * Graphics routines for TOPCAT frame buffer 22 */ 23 #include "sys/param.h" 24 #include "sys/errno.h" 25 26 #include "grfioctl.h" 27 #include "grfvar.h" 28 #include "grf_tcreg.h" 29 30 #include "../include/cpu.h" 31 32 /* 33 * Initialize hardware. 34 * Must fill in the grfinfo structure in g_softc. 35 * Returns 0 if hardware not present, non-zero ow. 36 */ 37 tc_init(gp, addr) 38 struct grf_softc *gp; 39 u_char *addr; 40 { 41 register struct tcboxfb *tp = (struct tcboxfb *) addr; 42 struct grfinfo *gi = &gp->g_display; 43 volatile u_char *fbp; 44 u_char save; 45 int fboff; 46 47 gi->gd_regaddr = (caddr_t) UNIOV(addr); 48 gi->gd_regsize = 0x10000; 49 gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb; 50 gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb; 51 fboff = (tp->fbomsb << 8) | tp->fbolsb; 52 gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16); 53 gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; 54 gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb; 55 gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb; 56 gi->gd_planes = tp->num_planes; 57 gi->gd_colors = 1 << gi->gd_planes; 58 if (gi->gd_colors == 1) { 59 fbp = (u_char *) IOV(gi->gd_fbaddr); 60 tp->wen = ~0; 61 tp->prr = 0x3; 62 tp->fben = ~0; 63 save = *fbp; 64 *fbp = 0xFF; 65 gi->gd_colors = *fbp + 1; 66 *fbp = save; 67 } 68 return(1); 69 } 70 71 /* 72 * Change the mode of the display. 73 * Right now all we can do is grfon/grfoff. 74 * Return a UNIX error number or 0 for success. 75 * Function may not be needed anymore. 76 */ 77 /*ARGSUSED*/ 78 tc_mode(gp, cmd) 79 struct grf_softc *gp; 80 { 81 int error = 0; 82 83 switch (cmd) { 84 case GM_GRFON: 85 case GM_GRFOFF: 86 break; 87 default: 88 error = EINVAL; 89 break; 90 } 91 return(error); 92 } 93 #endif 94