116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/* $NetBSD: bt_subr.c,v 1.7 2003/08/07 16:29:54 agc Exp $ */
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/*
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)bt_subr.c 8.2 (Berkeley) 1/21/94
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: bt_subr.c,v 1.7 2003/08/07 16:29:54 agc Exp $");
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/errno.h>
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#include <dev/sun/fbio.h>
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#include "btreg.h"
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#include "btvar.h"
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/*
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* Common code for dealing with Brooktree video DACs.
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* (Contains some software-only code as well, since the colormap
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* ioctls are shared between the cgthree and cgsix drivers.)
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*/
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/*
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* Implement an FBIOGETCMAP-like ioctl.
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*/
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int
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bt_getcmap(p, cm, cmsize)
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struct fbcmap *p;
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union bt_cmap *cm;
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int cmsize;
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{
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u_int i, start, count;
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u_char *cp;
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start = p->index;
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count = p->count;
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if (start >= cmsize || count > cmsize - start)
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return (EINVAL);
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if (!useracc(p->red, count, B_WRITE) ||
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!useracc(p->green, count, B_WRITE) ||
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!useracc(p->blue, count, B_WRITE))
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return (EFAULT);
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for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
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p->red[i] = cp[0];
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p->green[i] = cp[1];
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p->blue[i] = cp[2];
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}
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return (0);
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}
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/*
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* Implement the software portion of an FBIOPUTCMAP-like ioctl.
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*/
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int
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bt_putcmap(p, cm, cmsize)
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struct fbcmap *p;
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union bt_cmap *cm;
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int cmsize;
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{
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u_int i, start, count;
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u_char *cp;
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start = p->index;
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count = p->count;
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if (start >= cmsize || count > cmsize - start)
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return (EINVAL);
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if (!useracc(p->red, count, B_READ) ||
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!useracc(p->green, count, B_READ) ||
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!useracc(p->blue, count, B_READ))
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return (EFAULT);
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for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
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cp[0] = p->red[i];
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cp[1] = p->green[i];
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cp[2] = p->blue[i];
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}
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return (0);
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}
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