vga_subr.c revision 1.13
1 /* $NetBSD: vga_subr.c,v 1.13 2003/01/27 15:22:47 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1998 5 * Matthias Drochner. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: vga_subr.c,v 1.13 2003/01/27 15:22:47 tsutsui Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/queue.h> 42 #include <machine/bus.h> 43 44 #include <dev/ic/mc6845reg.h> 45 #include <dev/ic/pcdisplayvar.h> 46 #include <dev/ic/vgareg.h> 47 #include <dev/ic/vgavar.h> 48 49 #include <dev/wscons/wsdisplayvar.h> 50 51 static void fontram(struct vga_handle *); 52 static void textram(struct vga_handle *); 53 54 static void 55 fontram(struct vga_handle *vh) 56 { 57 58 /* program sequencer to access character generator */ 59 60 vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ 61 vga_ts_write(vh, wrplmask, 0x04); /* write to map 2 */ 62 vga_ts_write(vh, memmode, 0x07); /* sequential addressing */ 63 vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ 64 65 /* program graphics controller to access character generator */ 66 67 vga_gdc_write(vh, rdplanesel, 0x02); /* select map 2 for cpu reads */ 68 vga_gdc_write(vh, mode, 0x00); /* disable odd-even addressing */ 69 vga_gdc_write(vh, misc, 0x04); /* map starts at 0xA000 */ 70 } 71 72 static void 73 textram(struct vga_handle *vh) 74 { 75 76 /* program sequencer to access video ram */ 77 78 vga_ts_write(vh, syncreset, 0x01); /* synchronous reset */ 79 vga_ts_write(vh, wrplmask, 0x03); /* write to map 0 & 1 */ 80 vga_ts_write(vh, memmode, 0x03); /* odd-even addressing */ 81 vga_ts_write(vh, syncreset, 0x03); /* clear synchronous reset */ 82 83 /* program graphics controller for text mode */ 84 85 vga_gdc_write(vh, rdplanesel, 0x00); /* select map 0 for cpu reads */ 86 vga_gdc_write(vh, mode, 0x10); /* enable odd-even addressing */ 87 /* map starts at 0xb800 or 0xb000 (mono) */ 88 vga_gdc_write(vh, misc, (vh->vh_mono ? 0x0a : 0x0e)); 89 } 90 91 #ifndef VGA_RASTERCONSOLE 92 void 93 vga_loadchars(struct vga_handle *vh, int fontset, int first, int num, int lpc, 94 char *data) 95 { 96 int offset, i, j, s; 97 98 /* fontset number swizzle done in vga_setfontset() */ 99 offset = (fontset << 13) | (first << 5); 100 101 s = splhigh(); 102 fontram(vh); 103 104 for (i = 0; i < num; i++) 105 for (j = 0; j < lpc; j++) 106 bus_space_write_1(vh->vh_memt, vh->vh_allmemh, 107 offset + (i << 5) + j, data[i * lpc + j]); 108 109 textram(vh); 110 splx(s); 111 } 112 113 void 114 vga_readoutchars(struct vga_handle *vh, int fontset, int first, int num, 115 int lpc, char *data) 116 { 117 int offset, i, j, s; 118 119 /* fontset number swizzle done in vga_setfontset() */ 120 offset = (fontset << 13) | (first << 5); 121 122 s = splhigh(); 123 fontram(vh); 124 125 for (i = 0; i < num; i++) 126 for (j = 0; j < lpc; j++) 127 data[i * lpc + j] = bus_space_read_1(vh->vh_memt, 128 vh->vh_allmemh, offset + (i << 5) + j); 129 130 textram(vh); 131 splx(s); 132 } 133 134 #ifdef VGA_CONSOLE_ATI_BROKEN_FONTSEL 135 void 136 vga_copyfont01(struct vga_handle *vh) 137 { 138 int s; 139 140 s = splhigh(); 141 fontram(vh); 142 143 bus_space_copy_region_1(vh->vh_memt, vh->vh_allmemh, 0, 144 vh->vh_allmemh, 1 << 13, 1 << 13); 145 146 textram(vh); 147 splx(s); 148 } 149 #endif 150 151 void 152 vga_setfontset(struct vga_handle *vh, int fontset1, int fontset2) 153 { 154 u_int8_t cmap; 155 static const u_int8_t cmaptaba[] = { 156 0x00, 0x10, 0x01, 0x11, 157 0x02, 0x12, 0x03, 0x13 158 }; 159 static const u_int8_t cmaptabb[] = { 160 0x00, 0x20, 0x04, 0x24, 161 0x08, 0x28, 0x0c, 0x2c 162 }; 163 164 /* extended font if fontset1 != fontset2 */ 165 cmap = cmaptaba[fontset1] | cmaptabb[fontset2]; 166 167 vga_ts_write(vh, fontsel, cmap); 168 } 169 170 void 171 vga_setscreentype(struct vga_handle *vh, const struct wsscreen_descr *type) 172 { 173 174 vga_6845_write(vh, maxrow, type->fontheight - 1); 175 176 /* lo byte */ 177 vga_6845_write(vh, vde, type->fontheight * type->nrows - 1); 178 179 #ifndef PCDISPLAY_SOFTCURSOR 180 /* set cursor to last 2 lines */ 181 vga_6845_write(vh, curstart, type->fontheight - 2); 182 vga_6845_write(vh, curend, type->fontheight - 1); 183 #endif 184 /* 185 * disable colour plane 3 if needed for font selection 186 */ 187 if (type->capabilities & WSSCREEN_HILIT) { 188 /* 189 * these are the screens which don't support 190 * 512-character fonts 191 */ 192 vga_attr_write(vh, colplen, 0x0f); 193 } else 194 vga_attr_write(vh, colplen, 0x07); 195 } 196 197 #else /* !VGA_RASTERCONSOLE */ 198 void 199 vga_load_builtinfont(struct vga_handle *vh, u_int8_t *font, int firstchar, 200 int numchars) 201 { 202 int i, s; 203 204 s = splhigh(); 205 fontram(vh); 206 207 for (i = firstchar; i < firstchar + numchars; i++) 208 bus_space_read_region_1(vh->vh_memt, vh->vh_allmemh, i * 32, 209 font + i * 16, 16); 210 211 textram(vh); 212 splx(s); 213 } 214 #endif /* !VGA_RASTERCONSOLE */ 215
Indexes created Wed Sep 24 02:09:48 GMT 2025