/* $NetBSD: bt_subr.c,v 1.15 2010/11/13 13:52:11 uebayasi 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 1.15 2010/11/13 13:52:11 uebayasi Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/buf.h> #include <sys/errno.h> #include <sys/malloc.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(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(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(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[]; memcpy(&cm->cm_map[1][0], rasops_cmap, 3*16); } #endif } #if notyet static void bt_loadcmap_packed256(struct fbdevice *fb, volatile struct bt_regs *bt, int start, int 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
