161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
/* $NetBSD: vga_subr.c,v 1.6 2000/01/25 02:44:03 ad Exp $ */
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/*
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* Copyright (c) 1998
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* Matthias Drochner. All rights reserved.
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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. 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 for the NetBSD Project
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* by Matthias Drochner.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/queue.h>
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#include <machine/bus.h>
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#include <dev/ic/mc6845reg.h>
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#include <dev/ic/pcdisplayvar.h>
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#include <dev/ic/vgareg.h>
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#include <dev/ic/vgavar.h>
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#include <dev/wscons/wsdisplayvar.h>
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static void fontram __P((struct vga_handle *));
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static void textram __P((struct vga_handle *));
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static void
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fontram(vh)
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struct vga_handle *vh;
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{
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/* program sequencer to access character generator */
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vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
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vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */
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vga_ts_write(vh, memmode, 0x07); /* sequential addressing */
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vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
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/* program graphics controller to access character generator */
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vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for cpu reads */
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vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */
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vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */
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}
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static void
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textram(vh)
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struct vga_handle *vh;
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{
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/* program sequencer to access video ram */
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vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */
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vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */
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vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */
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vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */
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/* program graphics controller for text mode */
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vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for cpu reads */
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vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */
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/* map starts at 0xb800 or 0xb000 (mono) */
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vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e));
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}
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void
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vga_loadchars(vh, fontset, first, num, lpc, data)
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struct vga_handle *vh;
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int fontset, first, num;
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int lpc;
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char *data;
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{
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int offset, i, j, s;
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/* fontset number swizzle done in vga_setfontset() */
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offset = (fontset << 13) | (first << 5);
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s = splhigh();
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fontram(vh);
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for (i = 0; i < num; i++)
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for (j = 0; j < lpc; j++)
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bus_space_write_1(vh->vh_memt, vh->vh_allmemh,
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offset + (i << 5) + j,
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data[i * lpc + j]);
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textram(vh);
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splx(s);
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}
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void
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vga_setfontset(vh, fontset1, fontset2)
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struct vga_handle *vh;
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int fontset1, fontset2;
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{
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u_int8_t cmap;
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static u_int8_t cmaptaba[] = {
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0x00, 0x10, 0x01, 0x11,
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0x02, 0x12, 0x03, 0x13
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};
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static u_int8_t cmaptabb[] = {
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0x00, 0x20, 0x04, 0x24,
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0x08, 0x28, 0x0c, 0x2c
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};
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/* extended font if fontset1 != fontset2 */
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cmap = cmaptaba[fontset1] | cmaptabb[fontset2];
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vga_ts_write(vh, fontsel, cmap);
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}
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void
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vga_setscreentype(vh, type)
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struct vga_handle *vh;
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const struct wsscreen_descr *type;
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{
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vga_6845_write(vh, maxrow, type->fontheight - 1);
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/* lo byte */
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vga_6845_write(vh, vde, type->fontheight * type->nrows - 1);
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#ifndef PCDISPLAY_SOFTCURSOR
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/* set cursor to last 2 lines */
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vga_6845_write(vh, curstart, type->fontheight - 2);
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vga_6845_write(vh, curend, type->fontheight - 1);
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#endif
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/*
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* disable colour plane 3 if needed for font selection
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*/
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if (type->capabilities & WSSCREEN_HILIT) {
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/*
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* these are the screens which don't support
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* 512-character fonts
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*/
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vga_attr_write(vh, colplen, 0x0f);
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} else
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vga_attr_write(vh, colplen, 0x07);
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}
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