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 $Hdr: grf_gb.c 1.17 92/01/21$ 13 * 14 * @(#)grf_gb.c 7.6 (Berkeley) 10/11/92 15 */ 16 17 #include "grf.h" 18 #if NGRF > 0 19 20 /* 21 * Graphics routines for the Gatorbox. 22 * 23 * Note: In the context of this system, "gator" and "gatorbox" both refer to 24 * HP 987x0 graphics systems. "Gator" is not used for high res mono. 25 * (as in 9837 Gator systems) 26 */ 27 #include <sys/param.h> 28 #include <sys/errno.h> 29 30 #include <hp/dev/grfioctl.h> 31 #include <hp/dev/grfvar.h> 32 33 #include <hp300/dev/grf_gbreg.h> 34 #include <machine/cpu.h> 35 36 #define CRTC_DATA_LENGTH 0x0e 37 u_char crtc_init_data[CRTC_DATA_LENGTH] = { 38 0x29, 0x20, 0x23, 0x04, 0x30, 0x0b, 0x30, 39 0x30, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00 40 }; 41 42 /* 43 * Initialize hardware. 44 * Must point g_display at a grfinfo structure describing the hardware. 45 * Returns 0 if hardware not present, non-zero ow. 46 */ 47 gb_init(gp, addr) 48 struct grf_softc *gp; 49 caddr_t addr; 50 { 51 register struct gboxfb *gbp; 52 struct grfinfo *gi = &gp->g_display; 53 u_char *fbp, save; 54 int fboff; 55 extern caddr_t sctopa(), iomap(); 56 57 gbp = (struct gboxfb *) addr; 58 if (ISIIOVA(addr)) 59 gi->gd_regaddr = (caddr_t) IIOP(addr); 60 else 61 gi->gd_regaddr = sctopa(vatosc(addr)); 62 gi->gd_regsize = 0x10000; 63 gi->gd_fbwidth = 1024; /* XXX */ 64 gi->gd_fbheight = 1024; /* XXX */ 65 gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight; 66 fboff = (gbp->fbomsb << 8) | gbp->fbolsb; 67 gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16); 68 gp->g_regkva = addr; 69 gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize); 70 gi->gd_dwidth = 1024; /* XXX */ 71 gi->gd_dheight = 768; /* XXX */ 72 gi->gd_planes = 0; /* how do we do this? */ 73 /* 74 * The minimal register info here is from the Gatorbox X driver. 75 */ 76 fbp = (u_char *) gp->g_fbkva; 77 gbp->write_protect = 0; 78 gbp->interrupt = 4; /** fb_enable ? **/ 79 gbp->rep_rule = 3; /* GXcopy */ 80 gbp->blink1 = 0xff; 81 gbp->blink2 = 0xff; 82 83 gb_microcode(gbp); 84 85 /* 86 * Find out how many colors are available by determining 87 * which planes are installed. That is, write all ones to 88 * a frame buffer location, see how many ones are read back. 89 */ 90 save = *fbp; 91 *fbp = 0xFF; 92 gi->gd_colors = *fbp + 1; 93 *fbp = save; 94 return(1); 95 } 96 97 /* 98 * Program the 6845. 99 */ 100 gb_microcode(gbp) 101 register struct gboxfb *gbp; 102 { 103 register int i; 104 105 for (i = 0; i < CRTC_DATA_LENGTH; i++) { 106 gbp->crtc_address = i; 107 gbp->crtc_data = crtc_init_data[i]; 108 } 109 } 110 111 /* 112 * Change the mode of the display. 113 * Right now all we can do is grfon/grfoff. 114 * Return a UNIX error number or 0 for success. 115 */ 116 gb_mode(gp, cmd) 117 register struct grf_softc *gp; 118 { 119 struct gboxfb *gbp; 120 int error = 0; 121 122 gbp = (struct gboxfb *) gp->g_regkva; 123 switch (cmd) { 124 case GM_GRFON: 125 gbp->sec_interrupt = 1; 126 break; 127 case GM_GRFOFF: 128 break; 129 default: 130 error = EINVAL; 131 break; 132 } 133 return(error); 134 } 135 136 #endif 137