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 $Hdr: grf_rb.c 1.14 92/01/21$ 13 * 14 * @(#)grf_rb.c 7.6 (Berkeley) 06/05/92 15 */ 16 17 #include "grf.h" 18 #if NGRF > 0 19 20 /* 21 * Graphics routines for the Renaissance, HP98720 Graphics system. 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 "grf_rbreg.h" 29 30 #include "../include/cpu.h" 31 32 /* 33 * Initialize hardware. 34 * Must point g_display at a grfinfo structure describing the hardware. 35 * Returns 0 if hardware not present, non-zero ow. 36 */ 37 rb_init(gp, addr) 38 struct grf_softc *gp; 39 caddr_t addr; 40 { 41 register struct rboxfb *rbp; 42 struct grfinfo *gi = &gp->g_display; 43 int fboff; 44 extern caddr_t sctopa(), iomap(); 45 46 rbp = (struct rboxfb *) addr; 47 if (ISIIOVA(addr)) 48 gi->gd_regaddr = (caddr_t) IIOP(addr); 49 else 50 gi->gd_regaddr = sctopa(vatosc(addr)); 51 gi->gd_regsize = 0x20000; 52 gi->gd_fbwidth = (rbp->fbwmsb << 8) | rbp->fbwlsb; 53 gi->gd_fbheight = (rbp->fbhmsb << 8) | rbp->fbhlsb; 54 gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; 55 fboff = (rbp->fbomsb << 8) | rbp->fbolsb; 56 gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16); 57 if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) { 58 /* 59 * For DIO II space the fbaddr just computed is the offset 60 * from the select code base (regaddr) of the framebuffer. 61 * Hence it is also implicitly the size of the register set. 62 */ 63 gi->gd_regsize = (int) gi->gd_fbaddr; 64 gi->gd_fbaddr += (int) gi->gd_regaddr; 65 gp->g_regkva = addr; 66 gp->g_fbkva = addr + gi->gd_regsize; 67 } else { 68 /* 69 * For DIO space we need to map the seperate framebuffer. 70 */ 71 gp->g_regkva = addr; 72 gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize); 73 } 74 gi->gd_dwidth = (rbp->dwmsb << 8) | rbp->dwlsb; 75 gi->gd_dheight = (rbp->dwmsb << 8) | rbp->dwlsb; 76 gi->gd_planes = 0; /* ?? */ 77 gi->gd_colors = 256; 78 return(1); 79 } 80 81 /* 82 * Change the mode of the display. 83 * Right now all we can do is grfon/grfoff. 84 * Return a UNIX error number or 0 for success. 85 */ 86 rb_mode(gp, cmd) 87 register struct grf_softc *gp; 88 { 89 register struct rboxfb *rbp; 90 int error = 0; 91 92 rbp = (struct rboxfb *) gp->g_regkva; 93 switch (cmd) { 94 /* 95 * The minimal register info here is from the Renaissance X driver. 96 */ 97 case GM_GRFON: 98 case GM_GRFOFF: 99 break; 100 case GM_GRFOVON: 101 rbp->write_enable = 0; 102 rbp->opwen = 0xF; 103 rbp->drive = 0x10; 104 break; 105 case GM_GRFOVOFF: 106 rbp->opwen = 0; 107 rbp->write_enable = 0xffffffff; 108 rbp->drive = 0x01; 109 break; 110 default: 111 error = EINVAL; 112 break; 113 } 114 return(error); 115 } 116 117 #endif 118