Annotation of sys/arch/sparc/dev/bt_subr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: bt_subr.c,v 1.9 2003/06/02 23:27:53 millert Exp $ */
! 2: /* $NetBSD: bt_subr.c,v 1.5 1996/03/14 19:44:32 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)bt_subr.c 8.2 (Berkeley) 1/21/94
! 42: */
! 43:
! 44: #include <sys/param.h>
! 45: #include <sys/systm.h>
! 46: #include <sys/buf.h>
! 47: #include <sys/errno.h>
! 48:
! 49: #include <uvm/uvm_extern.h>
! 50:
! 51: #include <dev/wscons/wsconsio.h>
! 52:
! 53: #include <sparc/dev/btreg.h>
! 54: #include <sparc/dev/btvar.h>
! 55:
! 56: /*
! 57: * Common code for dealing with Brooktree video DACs.
! 58: */
! 59:
! 60: int
! 61: bt_getcmap(bcm, rcm)
! 62: union bt_cmap *bcm;
! 63: struct wsdisplay_cmap *rcm;
! 64: {
! 65: u_int index = rcm->index, count = rcm->count, i;
! 66: int error;
! 67:
! 68: if (index >= 256 || count > 256 - index)
! 69: return (EINVAL);
! 70: for (i = 0; i < count; i++) {
! 71: if ((error = copyout(&bcm->cm_map[index + i][0],
! 72: &rcm->red[i], 1)) != 0)
! 73: return (error);
! 74: if ((error = copyout(&bcm->cm_map[index + i][1],
! 75: &rcm->green[i], 1)) != 0)
! 76: return (error);
! 77: if ((error = copyout(&bcm->cm_map[index + i][2],
! 78: &rcm->blue[i], 1)) != 0)
! 79: return (error);
! 80: }
! 81: return (0);
! 82: }
! 83:
! 84: int
! 85: bt_putcmap(bcm, rcm)
! 86: union bt_cmap *bcm;
! 87: struct wsdisplay_cmap *rcm;
! 88: {
! 89: u_int index = rcm->index, count = rcm->count, i;
! 90: int error;
! 91:
! 92: if (index >= 256 || count > 256 - index)
! 93: return (EINVAL);
! 94: for (i = 0; i < count; i++) {
! 95: if ((error = copyin(&rcm->red[i],
! 96: &bcm->cm_map[index + i][0], 1)) != 0)
! 97: return (error);
! 98: if ((error = copyin(&rcm->green[i],
! 99: &bcm->cm_map[index + i][1], 1)) != 0)
! 100: return (error);
! 101: if ((error = copyin(&rcm->blue[i],
! 102: &bcm->cm_map[index + i][2], 1)) != 0)
! 103: return (error);
! 104: }
! 105: return (0);
! 106: }
! 107:
! 108: void
! 109: bt_loadcmap(cm, bt, start, ncolors, cgsix)
! 110: union bt_cmap *cm;
! 111: volatile struct bt_regs *bt;
! 112: u_int start, ncolors;
! 113: int cgsix;
! 114: {
! 115: u_int *ip, i;
! 116: int count;
! 117:
! 118: ip = &cm->cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
! 119: count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
! 120:
! 121: if (cgsix) {
! 122: /* hardware that makes one want to pound boards with hammers */
! 123: bt->bt_addr = BT_D4M4(start) << 24;
! 124: while (--count >= 0) {
! 125: i = *ip++;
! 126: bt->bt_cmap = i;
! 127: bt->bt_cmap = i << 8;
! 128: bt->bt_cmap = i << 16;
! 129: bt->bt_cmap = i << 24;
! 130: }
! 131: } else {
! 132: bt->bt_addr = BT_D4M4(start);
! 133: while (--count >= 0)
! 134: bt->bt_cmap = *ip++;
! 135: }
! 136: }
! 137:
! 138: void
! 139: bt_setcolor(cm, bt, index, r, g, b, cgsix)
! 140: union bt_cmap *cm;
! 141: volatile struct bt_regs *bt;
! 142: u_int index;
! 143: u_int8_t r, g, b;
! 144: int cgsix;
! 145: {
! 146:
! 147: cm->cm_map[index][0] = r;
! 148: cm->cm_map[index][1] = g;
! 149: cm->cm_map[index][2] = b;
! 150: bt_loadcmap(cm, bt, index, 1, cgsix);
! 151: }
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