1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. 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 $Hdr: grf_tc.c 1.19 92/01/21$ 13 * 14 * @(#)grf_tc.c 8.1 (Berkeley) 06/10/93 15 */ 16 17 #include "grf.h" 18 #if NGRF > 0 19 20 /* 21 * Graphics routines for TOPCAT and CATSEYE frame buffers 22 */ 23 #include <sys/param.h> 24 #include <sys/errno.h> 25 26 #include <hp/dev/grfioctl.h> 27 #include <hp/dev/grfvar.h> 28 #include <hp300/dev/grf_tcreg.h> 29 30 #include <machine/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 caddr_t 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 extern caddr_t sctopa(), iomap(); 47 48 if (ISIIOVA(addr)) 49 gi->gd_regaddr = (caddr_t) IIOP(addr); 50 else 51 gi->gd_regaddr = sctopa(vatosc(addr)); 52 gi->gd_regsize = 0x10000; 53 gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb; 54 gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb; 55 gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; 56 fboff = (tp->fbomsb << 8) | tp->fbolsb; 57 gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16); 58 if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) { 59 /* 60 * For DIO II space the fbaddr just computed is the offset 61 * from the select code base (regaddr) of the framebuffer. 62 * Hence it is also implicitly the size of the register set. 63 */ 64 gi->gd_regsize = (int) gi->gd_fbaddr; 65 gi->gd_fbaddr += (int) gi->gd_regaddr; 66 gp->g_regkva = addr; 67 gp->g_fbkva = addr + gi->gd_regsize; 68 } else { 69 /* 70 * For DIO space we need to map the seperate framebuffer. 71 */ 72 gp->g_regkva = addr; 73 gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize); 74 } 75 gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb; 76 gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb; 77 gi->gd_planes = tp->num_planes; 78 gi->gd_colors = 1 << gi->gd_planes; 79 if (gi->gd_colors == 1) { 80 fbp = (u_char *) gp->g_fbkva; 81 tp->wen = ~0; 82 tp->prr = 0x3; 83 tp->fben = ~0; 84 save = *fbp; 85 *fbp = 0xFF; 86 gi->gd_colors = *fbp + 1; 87 *fbp = save; 88 } 89 return(1); 90 } 91 92 /* 93 * Change the mode of the display. 94 * Right now all we can do is grfon/grfoff. 95 * Return a UNIX error number or 0 for success. 96 * Function may not be needed anymore. 97 */ 98 /*ARGSUSED*/ 99 tc_mode(gp, cmd) 100 struct grf_softc *gp; 101 { 102 int error = 0; 103 104 switch (cmd) { 105 case GM_GRFON: 106 case GM_GRFOFF: 107 break; 108 default: 109 error = EINVAL; 110 break; 111 } 112 return(error); 113 } 114 #endif 115