265 lines
6.4 KiB
C
265 lines
6.4 KiB
C
/* $NetBSD: bt_subr.c,v 1.8 2003/11/13 03:09:29 chs Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Lawrence Berkeley Laboratory.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)bt_subr.c 8.2 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: bt_subr.c,v 1.8 2003/11/13 03:09:29 chs Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <uvm/uvm_extern.h>
|
|
|
|
#include <dev/sun/fbio.h>
|
|
|
|
#include <dev/sun/btreg.h>
|
|
#include <dev/sun/btvar.h>
|
|
|
|
/*
|
|
* Common code for dealing with Brooktree video DACs.
|
|
* (Contains some software-only code as well, since the colormap
|
|
* ioctls are shared between the cgthree and cgsix drivers.)
|
|
*/
|
|
|
|
/*
|
|
* Implement an FBIOGETCMAP-like ioctl.
|
|
*/
|
|
int
|
|
bt_getcmap(p, cm, cmsize, uspace)
|
|
struct fbcmap *p;
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
int uspace;
|
|
{
|
|
u_int i, start, count;
|
|
int error = 0;
|
|
u_char *cp, *r, *g, *b;
|
|
u_char *cbuf = NULL;
|
|
|
|
start = p->index;
|
|
count = p->count;
|
|
if (start >= cmsize || count > cmsize - start)
|
|
return (EINVAL);
|
|
|
|
if (uspace) {
|
|
/* Allocate temporary buffer for color values */
|
|
cbuf = malloc(3 * count * sizeof(char), M_TEMP, M_WAITOK);
|
|
r = cbuf;
|
|
g = r + count;
|
|
b = g + count;
|
|
} else {
|
|
/* Direct access in kernel space */
|
|
r = p->red;
|
|
g = p->green;
|
|
b = p->blue;
|
|
}
|
|
|
|
/* Copy colors from BT map to fbcmap */
|
|
for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
|
|
r[i] = cp[0];
|
|
g[i] = cp[1];
|
|
b[i] = cp[2];
|
|
}
|
|
|
|
if (uspace) {
|
|
error = copyout(r, p->red, count);
|
|
if (error)
|
|
goto out;
|
|
error = copyout(g, p->green, count);
|
|
if (error)
|
|
goto out;
|
|
error = copyout(b, p->blue, count);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
if (cbuf != NULL)
|
|
free(cbuf, M_TEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Implement the software portion of an FBIOPUTCMAP-like ioctl.
|
|
*/
|
|
int
|
|
bt_putcmap(p, cm, cmsize, uspace)
|
|
struct fbcmap *p;
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
int uspace;
|
|
{
|
|
u_int i, start, count;
|
|
int error = 0;
|
|
u_char *cp, *r, *g, *b;
|
|
u_char *cbuf = NULL;
|
|
|
|
start = p->index;
|
|
count = p->count;
|
|
if (start >= cmsize || count > cmsize - start)
|
|
return (EINVAL);
|
|
|
|
if (uspace) {
|
|
/* Allocate temporary buffer for color values */
|
|
cbuf = malloc(3 * count * sizeof(char), M_TEMP, M_WAITOK);
|
|
r = cbuf;
|
|
g = r + count;
|
|
b = g + count;
|
|
error = copyin(p->red, r, count);
|
|
if (error)
|
|
goto out;
|
|
error = copyin(p->green, g, count);
|
|
if (error)
|
|
goto out;
|
|
error = copyin(p->blue, b, count);
|
|
if (error)
|
|
goto out;
|
|
} else {
|
|
/* Direct access in kernel space */
|
|
r = p->red;
|
|
g = p->green;
|
|
b = p->blue;
|
|
}
|
|
|
|
/* Copy colors from fbcmap to BT map */
|
|
for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
|
|
cp[0] = r[i];
|
|
cp[1] = g[i];
|
|
cp[2] = b[i];
|
|
}
|
|
|
|
out:
|
|
if (cbuf != NULL)
|
|
free(cbuf, M_TEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Initialize the color map to the default state:
|
|
*
|
|
* - 0 is white (PROM uses entry 0 for background)
|
|
* - all other entries are black (PROM uses entry 255 for foreground)
|
|
*/
|
|
void
|
|
bt_initcmap(cm, cmsize)
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
{
|
|
int i;
|
|
u_char *cp;
|
|
|
|
cp = &cm->cm_map[0][0];
|
|
cp[0] = cp[1] = cp[2] = 0xff;
|
|
|
|
for (i = 1, cp = &cm->cm_map[i][0]; i < cmsize; cp += 3, i++)
|
|
cp[0] = cp[1] = cp[2] = 0;
|
|
|
|
#ifdef RASTERCONSOLE
|
|
if (cmsize > 16) {
|
|
/*
|
|
* Setup an ANSI map at offset 1, for rasops;
|
|
* see dev/fb.c for usage (XXX - this should
|
|
* be replaced by more general colormap handling)
|
|
*/
|
|
extern u_char rasops_cmap[];
|
|
bcopy(rasops_cmap, &cm->cm_map[1][0], 3*16);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if notyet
|
|
static void
|
|
bt_loadcmap_packed256(fb, bt, start, ncolors)
|
|
struct fbdevice *fb;
|
|
volatile struct bt_regs *bt;
|
|
int start, ncolors;
|
|
{
|
|
u_int v;
|
|
int count, i;
|
|
u_char *c[3], **p;
|
|
struct cmap *cm = &fb->fb_cmap;
|
|
|
|
count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
|
|
bt = &sc->sc_fbc->fbc_dac;
|
|
bt->bt_addr = BT_D4M4(start);
|
|
|
|
/*
|
|
* Figure out where to start in the RGB arrays
|
|
* See btreg.h for the way RGB triplets are packed into 4-byte words.
|
|
*/
|
|
c[0] = &cm->red[(4 * count) / 3)];
|
|
c[1] = &cm->green[(4 * count) / 3];
|
|
c[2] = &cm->blue[(4 * count) / 3];
|
|
p = &c[0];
|
|
i = (4 * count) % 3; /* This much of the last triplet is already in
|
|
the last packed word */
|
|
while (i--) {
|
|
c[1-i]++;
|
|
p++;
|
|
}
|
|
|
|
|
|
while (--count >= 0) {
|
|
u_int v = 0;
|
|
|
|
/*
|
|
* Retrieve four colormap entries, pack them into
|
|
* a 32-bit word and write to the hardware register.
|
|
*/
|
|
for (i = 0; i < 4; i++) {
|
|
u_char *cp = *p;
|
|
v |= *cp++ << (8 * i);
|
|
*p = cp;
|
|
if (p++ == &c[2])
|
|
/* Wrap around */
|
|
p = &c[0];
|
|
}
|
|
|
|
bt->bt_cmap = v;
|
|
}
|
|
}
|
|
#endif
|