Home | History | Annotate | Line # | Download | only in dev
bt_subr.c revision 1.10
      1  1.10  tsutsui /*	$NetBSD: bt_subr.c,v 1.10 2024/12/20 23:51:59 tsutsui Exp $ */
      2   1.1      gwr 
      3   1.1      gwr /*
      4   1.1      gwr  * Copyright (c) 1993
      5   1.1      gwr  *	The Regents of the University of California.  All rights reserved.
      6   1.1      gwr  *
      7   1.1      gwr  * This software was developed by the Computer Systems Engineering group
      8   1.1      gwr  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9   1.1      gwr  * contributed to Berkeley.
     10   1.1      gwr  *
     11   1.1      gwr  * All advertising materials mentioning features or use of this software
     12   1.1      gwr  * must display the following acknowledgement:
     13   1.1      gwr  *	This product includes software developed by the University of
     14   1.1      gwr  *	California, Lawrence Berkeley Laboratory.
     15   1.1      gwr  *
     16   1.1      gwr  * Redistribution and use in source and binary forms, with or without
     17   1.1      gwr  * modification, are permitted provided that the following conditions
     18   1.1      gwr  * are met:
     19   1.1      gwr  * 1. Redistributions of source code must retain the above copyright
     20   1.1      gwr  *    notice, this list of conditions and the following disclaimer.
     21   1.1      gwr  * 2. Redistributions in binary form must reproduce the above copyright
     22   1.1      gwr  *    notice, this list of conditions and the following disclaimer in the
     23   1.1      gwr  *    documentation and/or other materials provided with the distribution.
     24   1.7      agc  * 3. Neither the name of the University nor the names of its contributors
     25   1.1      gwr  *    may be used to endorse or promote products derived from this software
     26   1.1      gwr  *    without specific prior written permission.
     27   1.1      gwr  *
     28   1.1      gwr  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29   1.1      gwr  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30   1.1      gwr  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31   1.1      gwr  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32   1.1      gwr  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33   1.1      gwr  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34   1.1      gwr  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35   1.1      gwr  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36   1.1      gwr  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37   1.1      gwr  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38   1.1      gwr  * SUCH DAMAGE.
     39   1.1      gwr  *
     40   1.1      gwr  *	@(#)bt_subr.c	8.2 (Berkeley) 1/21/94
     41   1.1      gwr  */
     42   1.6    lukem 
     43   1.6    lukem #include <sys/cdefs.h>
     44  1.10  tsutsui __KERNEL_RCSID(0, "$NetBSD: bt_subr.c,v 1.10 2024/12/20 23:51:59 tsutsui Exp $");
     45   1.1      gwr 
     46   1.1      gwr #include <sys/param.h>
     47   1.1      gwr #include <sys/buf.h>
     48   1.1      gwr #include <sys/errno.h>
     49   1.1      gwr 
     50   1.4  thorpej #include <dev/sun/fbio.h>
     51   1.1      gwr 
     52   1.2      gwr #include "btreg.h"
     53   1.2      gwr #include "btvar.h"
     54   1.1      gwr 
     55   1.1      gwr /*
     56   1.1      gwr  * Common code for dealing with Brooktree video DACs.
     57   1.1      gwr  * (Contains some software-only code as well, since the colormap
     58   1.1      gwr  * ioctls are shared between the cgthree and cgsix drivers.)
     59   1.1      gwr  */
     60   1.1      gwr 
     61   1.1      gwr /*
     62   1.1      gwr  * Implement an FBIOGETCMAP-like ioctl.
     63   1.1      gwr  */
     64  1.10  tsutsui int
     65   1.8      chs bt_getcmap(struct fbcmap *p, union bt_cmap *cm, int cmsize)
     66   1.1      gwr {
     67   1.3  tsutsui 	u_int i, start, count;
     68   1.3  tsutsui 	u_char *cp;
     69   1.1      gwr 
     70   1.1      gwr 	start = p->index;
     71   1.1      gwr 	count = p->count;
     72   1.5   itojun 	if (start >= cmsize || count > cmsize - start)
     73   1.1      gwr 		return (EINVAL);
     74   1.1      gwr 	if (!useracc(p->red, count, B_WRITE) ||
     75   1.1      gwr 	    !useracc(p->green, count, B_WRITE) ||
     76   1.1      gwr 	    !useracc(p->blue, count, B_WRITE))
     77   1.1      gwr 		return (EFAULT);
     78   1.1      gwr 	for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
     79   1.1      gwr 		p->red[i] = cp[0];
     80   1.1      gwr 		p->green[i] = cp[1];
     81   1.1      gwr 		p->blue[i] = cp[2];
     82   1.1      gwr 	}
     83   1.1      gwr 	return (0);
     84   1.1      gwr }
     85   1.1      gwr 
     86   1.1      gwr /*
     87   1.1      gwr  * Implement the software portion of an FBIOPUTCMAP-like ioctl.
     88   1.1      gwr  */
     89  1.10  tsutsui int
     90   1.8      chs bt_putcmap(struct fbcmap *p, union bt_cmap *cm, int cmsize)
     91   1.1      gwr {
     92   1.3  tsutsui 	u_int i, start, count;
     93   1.3  tsutsui 	u_char *cp;
     94   1.1      gwr 
     95   1.1      gwr 	start = p->index;
     96   1.1      gwr 	count = p->count;
     97   1.5   itojun 	if (start >= cmsize || count > cmsize - start)
     98   1.1      gwr 		return (EINVAL);
     99   1.1      gwr 	if (!useracc(p->red, count, B_READ) ||
    100   1.1      gwr 	    !useracc(p->green, count, B_READ) ||
    101   1.1      gwr 	    !useracc(p->blue, count, B_READ))
    102   1.1      gwr 		return (EFAULT);
    103   1.1      gwr 	for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
    104   1.1      gwr 		cp[0] = p->red[i];
    105   1.1      gwr 		cp[1] = p->green[i];
    106   1.1      gwr 		cp[2] = p->blue[i];
    107   1.1      gwr 	}
    108   1.1      gwr 	return (0);
    109   1.1      gwr }
    110