pci_vga.c revision 1.6
1 /* $NetBSD: pci_vga.c,v 1.6 2001/05/29 06:01:27 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Leo Weppelman. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Leo Weppelman. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/systm.h> 34 #include <dev/pci/pcireg.h> 35 #include <dev/pci/pcivar.h> 36 #include <dev/pci/pcidevs.h> 37 #include <atari/pci/pci_vga.h> 38 #include <atari/dev/grf_etreg.h> 39 #include <atari/include/iomap.h> 40 41 #include <atari/dev/font.h> 42 43 #include "vga_pci.h" 44 #if NVGA_PCI > 0 45 #include <dev/cons.h> 46 #include <dev/ic/mc6845reg.h> 47 #include <dev/ic/pcdisplayvar.h> 48 #include <dev/ic/vgareg.h> 49 #include <dev/ic/vgavar.h> 50 #endif 51 52 static void loadfont(volatile u_char *, u_char *fb); 53 54 /* XXX: Shouldn't these be in font.h???? */ 55 extern font_info font_info_8x8; 56 extern font_info font_info_8x16; 57 58 /* Console colors */ 59 static u_char conscolors[3][3] = { /* background, foreground, hilite */ 60 {0x0, 0x0, 0x0}, {0x30, 0x30, 0x30}, { 0x3f, 0x3f, 0x3f} 61 }; 62 63 static bus_space_tag_t vga_iot, vga_memt; 64 static int tags_valid = 0; 65 66 #define VGA_REG_SIZE (8*1024) 67 #define VGA_FB_SIZE (32*1024) 68 69 /* 70 * Go look for a VGA card on the PCI-bus. This search is a 71 * stripped down version of the PCI-probe. It only looks on 72 * bus0 for VGA cards. The first card found is used. 73 */ 74 int 75 check_for_vga(iot, memt) 76 bus_space_tag_t iot, memt; 77 { 78 pci_chipset_tag_t pc = NULL; /* XXX */ 79 bus_space_handle_t ioh_regs, memh_fb; 80 pcitag_t tag; 81 int device, found, id, maxndevs, i, j; 82 int class, got_ioh, got_memh, rv; 83 volatile u_char *regs; 84 u_char *fb; 85 char *nbd = "NetBSD/Atari"; 86 87 found = 0; 88 tag = 0; 89 id = 0; 90 rv = 0; 91 got_ioh = 0; 92 got_memh = 0; 93 maxndevs = pci_bus_maxdevs(pc, 0); 94 95 /* 96 * Map 8Kb of registers and 32Kb frame buffer. 97 * XXX: The way the registers are mapped here is plain wrong. 98 * We should try to pin-point the region down to 3[bcd]0 (see 99 * .../dev/ic/vga.c). 100 */ 101 if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs)) 102 return 0; 103 got_ioh = 1; 104 105 if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb)) 106 goto bad; 107 got_memh = 1; 108 regs = bus_space_vaddr(iot, ioh_regs); 109 fb = bus_space_vaddr(memt, memh_fb); 110 111 for (device = 0; !found && (device < maxndevs); device++) { 112 113 tag = pci_make_tag(pc, 0, device, 0); 114 id = pci_conf_read(pc, tag, PCI_ID_REG); 115 if (id == 0 || id == 0xffffffff) 116 continue; 117 118 /* 119 * Check if we have some display device here... 120 */ 121 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 122 i = 0; 123 if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC && 124 PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA) 125 i = 1; 126 if (PCI_CLASS(class) == PCI_CLASS_DISPLAY && 127 PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) 128 i = 1; 129 if (i == 0) 130 continue; 131 132 #if _MILANHW_ 133 /* Don't need to be more specific */ 134 milan_vga_init(pc, tag, id, regs, fb); 135 found = 1; 136 #else 137 switch (id = PCI_PRODUCT(id)) { 138 139 /* 140 * XXX Make the inclusion of the cases dependend 141 * on config options! 142 */ 143 case PCI_PRODUCT_TSENG_ET6000: 144 case PCI_PRODUCT_TSENG_ET4000_W32P_A: 145 case PCI_PRODUCT_TSENG_ET4000_W32P_B: 146 case PCI_PRODUCT_TSENG_ET4000_W32P_C: 147 case PCI_PRODUCT_TSENG_ET4000_W32P_D: 148 tseng_init(pc, tag, id, regs, fb); 149 found = 1; 150 break; 151 default: 152 break; 153 } 154 #endif /* _MILANHW_ */ 155 } 156 if (!found) 157 goto bad; 158 159 /* 160 * Assume the device is in CGA mode. Wscons expects this too... 161 */ 162 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 163 if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) { 164 got_memh = 0; 165 goto bad; 166 } 167 fb = bus_space_vaddr(memt, memh_fb); 168 169 /* 170 * Generic parts of the initialization... 171 */ 172 173 /* B&W colors */ 174 vgaw(regs, VDAC_ADDRESS_W, 0); 175 for (i = 0; i < 256; i++) { 176 j = (i & 1) ? ((i > 7) ? 2 : 1) : 0; 177 vgaw(regs, VDAC_DATA, conscolors[j][0]); 178 vgaw(regs, VDAC_DATA, conscolors[j][1]); 179 vgaw(regs, VDAC_DATA, conscolors[j][2]); 180 } 181 182 loadfont(regs, fb); 183 184 /* 185 * Clear the screen and print a message. The latter 186 * is of diagnostic/debug use only. 187 */ 188 for (i = 50 * 80; i >= 0; i -= 2) { 189 fb[i] = 0x20; fb[i+1] = 0x07; 190 } 191 for (i = 56; *nbd; i += 2) 192 fb[i] = *nbd++; 193 194 rv = 1; 195 vga_iot = iot; 196 vga_memt = memt; 197 rv = tags_valid = 1; 198 199 bad: 200 if (got_memh) 201 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 202 if (got_ioh) 203 bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE); 204 return (rv); 205 } 206 207 #if NVGA_PCI > 0 208 void vgacnprobe(struct consdev *); 209 void vgacninit(struct consdev *); 210 211 void 212 vgacnprobe(cp) 213 struct consdev *cp; 214 { 215 if (tags_valid) 216 cp->cn_pri = CN_NORMAL; 217 } 218 219 void 220 vgacninit(cp) 221 struct consdev *cp; 222 { 223 if (tags_valid) { 224 /* XXX: Are those arguments correct? Leo */ 225 vga_cnattach(vga_iot, vga_memt, 8, 0); 226 } 227 } 228 #endif /* NVGA_PCI */ 229 230 /* 231 * Generic VGA. Load the configured kernel font into the videomemory and 232 * place the card into textmode. 233 */ 234 static void 235 loadfont(ba, fb) 236 volatile u_char *ba; /* Register area KVA */ 237 u_char *fb; /* Frame buffer KVA */ 238 { 239 font_info *fd; 240 u_char *c, *f, tmp; 241 u_short z, y; 242 243 #if defined(KFONT_8X8) 244 fd = &font_info_8x8; 245 #else 246 fd = &font_info_8x16; 247 #endif 248 249 WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a); 250 WSeq(ba, SEQ_ID_MAP_MASK, 0x04); 251 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06); 252 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02); 253 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00); 254 WGfx(ba, GCT_ID_MISC, 0x0c); 255 256 /* 257 * load text font into beginning of display memory. Each 258 * character cell is 32 bytes long (enough for 4 planes) 259 */ 260 for (z = 0, c = fb; z < 256 * 32; z++) 261 *c++ = 0; 262 263 c = (unsigned char *) (fb) + (32 * fd->font_lo); 264 f = fd->font_p; 265 z = fd->font_lo; 266 for (; z <= fd->font_hi; z++, c += (32 - fd->height)) 267 for (y = 0; y < fd->height; y++) { 268 *c++ = *f++; 269 } 270 271 /* 272 * Odd/Even addressing 273 */ 274 WSeq(ba, SEQ_ID_MAP_MASK, 0x03); 275 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03); 276 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00); 277 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10); 278 WGfx(ba, GCT_ID_MISC, 0x0e); 279 280 /* 281 * Font height + underline location 282 */ 283 tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0; 284 WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1)); 285 tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0; 286 WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1)); 287 288 /* 289 * Cursor setup 290 */ 291 WCrt(ba, CRT_ID_CURSOR_START , 0x00); 292 WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1); 293 WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00); 294 WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00); 295 296 /* 297 * Enter text mode 298 */ 299 WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3); 300 WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a); 301 } 302
Indexes created Fri Oct 03 17:10:05 GMT 2025