/* $OpenBSD: vga_subr.c,v 1.3 2004/04/02 04:39:50 deraadt Exp $ */ /* $NetBSD: vga_subr.c,v 1.6 2000/01/25 02:44:03 ad Exp $ */ /* * Copyright (c) 1998 * Matthias Drochner. All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * */ #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/queue.h> #include <machine/bus.h> #include <dev/ic/mc6845reg.h> #include <dev/ic/pcdisplayvar.h> #include <dev/ic/vgareg.h> #include <dev/ic/vgavar.h> #include <dev/wscons/wsdisplayvar.h> static void fontram(struct vga_handle *); static void textram(struct vga_handle *); static void fontram(vh) struct vga_handle *vh; { /* program sequencer to access character generator */ vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */ vga_ts_write(vh, memmode, 0x07); /* sequential addressing */ vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ /* program graphics controller to access character generator */ vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for cpu reads */ vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */ vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */ } static void textram(vh) struct vga_handle *vh; { /* program sequencer to access video ram */ vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */ vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */ vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ /* program graphics controller for text mode */ vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for cpu reads */ vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */ /* map starts at 0xb800 or 0xb000 (mono) */ vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e)); } void vga_loadchars(vh, fontset, first, num, lpc, data) struct vga_handle *vh; int fontset, first, num; int lpc; char *data; { int offset, i, j, s; /* fontset number swizzle done in vga_setfontset() */ offset = (fontset << 13) | (first << 5); s = splhigh(); fontram(vh); for (i = 0; i < num; i++) for (j = 0; j < lpc; j++) bus_space_write_1(vh->vh_memt, vh->vh_allmemh, offset + (i << 5) + j, data[i * lpc + j]); textram(vh); splx(s); } void vga_setfontset(vh, fontset1, fontset2) struct vga_handle *vh; int fontset1, fontset2; { u_int8_t cmap; static u_int8_t cmaptaba[] = { 0x00, 0x10, 0x01, 0x11, 0x02, 0x12, 0x03, 0x13 }; static u_int8_t cmaptabb[] = { 0x00, 0x20, 0x04, 0x24, 0x08, 0x28, 0x0c, 0x2c }; /* extended font if fontset1 != fontset2 */ cmap = cmaptaba[fontset1] | cmaptabb[fontset2]; vga_ts_write(vh, fontsel, cmap); } void vga_setscreentype(vh, type) struct vga_handle *vh; const struct wsscreen_descr *type; { vga_6845_write(vh, maxrow, type->fontheight - 1); /* lo byte */ vga_6845_write(vh, vde, type->fontheight * type->nrows - 1); #ifndef PCDISPLAY_SOFTCURSOR /* set cursor to last 2 lines */ vga_6845_write(vh, curstart, type->fontheight - 2); vga_6845_write(vh, curend, type->fontheight - 1); #endif /* * disable colour plane 3 if needed for font selection */ if (type->capabilities & WSSCREEN_HILIT) { /* * these are the screens which don't support * 512-character fonts */ vga_attr_write(vh, colplen, 0x0f); } else vga_attr_write(vh, colplen, 0x07); }