pci_vga.c revision 1.5
1 /* $NetBSD: pci_vga.c,v 1.5 2001/05/28 08:30:03 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 #if NVGA_PCI > 0 44 #include <dev/cons.h> 45 #include <dev/ic/mc6845reg.h> 46 #include <dev/ic/pcdisplayvar.h> 47 #include <dev/ic/vgareg.h> 48 #include <dev/ic/vgavar.h> 49 #endif 50 51 static void loadfont(volatile u_char *, u_char *fb); 52 53 /* XXX: Shouldn't these be in font.h???? */ 54 extern font_info font_info_8x8; 55 extern font_info font_info_8x16; 56 57 /* Console colors */ 58 static u_char conscolors[3][3] = { /* background, foreground, hilite */ 59 {0x0, 0x0, 0x0}, {0x30, 0x30, 0x30}, { 0x3f, 0x3f, 0x3f} 60 }; 61 62 static bus_space_tag_t vga_iot, vga_memt; 63 static int tags_valid = 0; 64 65 #define VGA_REG_SIZE (8*1024) 66 #define VGA_FB_SIZE (32*1024) 67 68 /* 69 * Go look for a VGA card on the PCI-bus. This search is a 70 * stripped down version of the PCI-probe. It only looks on 71 * bus0 for VGA cards. The first card found is used. 72 */ 73 int 74 check_for_vga(iot, memt) 75 bus_space_tag_t iot, memt; 76 { 77 pci_chipset_tag_t pc = NULL; /* XXX */ 78 bus_space_handle_t ioh_regs, memh_fb; 79 pcitag_t tag; 80 int device, found, id, maxndevs, i, j; 81 int class, got_ioh, got_memh, rv; 82 volatile u_char *regs; 83 u_char *fb; 84 char *nbd = "NetBSD/Atari"; 85 86 found = 0; 87 tag = 0; 88 id = 0; 89 rv = 0; 90 got_ioh = 0; 91 got_memh = 0; 92 maxndevs = pci_bus_maxdevs(pc, 0); 93 94 /* 95 * Map 8Kb of registers and 32Kb frame buffer. 96 * XXX: The way the registers are mapped here is plain wrong. 97 * We should try to pin-point the region down to 3[bcd]0 (see 98 * .../dev/ic/vga.c). 99 */ 100 if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs)) 101 return 0; 102 got_ioh = 1; 103 104 if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb)) 105 goto bad; 106 got_memh = 1; 107 regs = bus_space_vaddr(iot, ioh_regs); 108 fb = bus_space_vaddr(memt, memh_fb); 109 110 for (device = 0; !found && (device < maxndevs); device++) { 111 112 tag = pci_make_tag(pc, 0, device, 0); 113 id = pci_conf_read(pc, tag, PCI_ID_REG); 114 if (id == 0 || id == 0xffffffff) 115 continue; 116 117 /* 118 * Check if we have some display device here... 119 */ 120 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 121 i = 0; 122 if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC && 123 PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA) 124 i = 1; 125 if (PCI_CLASS(class) == PCI_CLASS_DISPLAY && 126 PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) 127 i = 1; 128 if (i == 0) 129 continue; 130 131 #if _MILANHW_ 132 /* Don't need to be more specific */ 133 milan_vga_init(pc, tag, id, regs, fb); 134 found = 1; 135 #else 136 switch (id = PCI_PRODUCT(id)) { 137 138 /* 139 * XXX Make the inclusion of the cases dependend 140 * on config options! 141 */ 142 case PCI_PRODUCT_TSENG_ET6000: 143 case PCI_PRODUCT_TSENG_ET4000_W32P_A: 144 case PCI_PRODUCT_TSENG_ET4000_W32P_B: 145 case PCI_PRODUCT_TSENG_ET4000_W32P_C: 146 case PCI_PRODUCT_TSENG_ET4000_W32P_D: 147 tseng_init(pc, tag, id, regs, fb); 148 found = 1; 149 break; 150 default: 151 break; 152 } 153 #endif /* _MILANHW_ */ 154 } 155 if (!found) 156 goto bad; 157 158 /* 159 * Assume the device is in CGA mode. Wscons expects this too... 160 */ 161 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 162 if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) { 163 got_memh = 0; 164 goto bad; 165 } 166 fb = bus_space_vaddr(memt, memh_fb); 167 168 /* 169 * Generic parts of the initialization... 170 */ 171 172 /* B&W colors */ 173 vgaw(regs, VDAC_ADDRESS_W, 0); 174 for (i = 0; i < 256; i++) { 175 j = (i & 1) ? ((i > 7) ? 2 : 1) : 0; 176 vgaw(regs, VDAC_DATA, conscolors[j][0]); 177 vgaw(regs, VDAC_DATA, conscolors[j][1]); 178 vgaw(regs, VDAC_DATA, conscolors[j][2]); 179 } 180 181 loadfont(regs, fb); 182 183 /* 184 * Clear the screen and print a message. The latter 185 * is of diagnostic/debug use only. 186 */ 187 for (i = 50 * 80; i >= 0; i -= 2) { 188 fb[i] = 0x20; fb[i+1] = 0x07; 189 } 190 for (i = 56; *nbd; i += 2) 191 fb[i] = *nbd++; 192 193 rv = 1; 194 vga_iot = iot; 195 vga_memt = memt; 196 rv = tags_valid = 1; 197 198 bad: 199 if (got_memh) 200 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 201 if (got_ioh) 202 bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE); 203 return (rv); 204 } 205 206 #if NVGA_PCI > 0 207 void vgacnprobe(struct consdev *); 208 void vgacninit(struct consdev *); 209 210 void 211 vgacnprobe(cp) 212 struct consdev *cp; 213 { 214 if (tags_valid) 215 cp->cn_pri = CN_NORMAL; 216 } 217 218 void 219 vgacninit(cp) 220 struct consdev *cp; 221 { 222 if (tags_valid) { 223 /* XXX: Are those arguments correct? Leo */ 224 vga_cnattach(vga_iot, vga_memt, 8, 0); 225 } 226 } 227 #endif /* NVGA_PCI */ 228 229 /* 230 * Generic VGA. Load the configured kernel font into the videomemory and 231 * place the card into textmode. 232 */ 233 static void 234 loadfont(ba, fb) 235 volatile u_char *ba; /* Register area KVA */ 236 u_char *fb; /* Frame buffer KVA */ 237 { 238 font_info *fd; 239 u_char *c, *f, tmp; 240 u_short z, y; 241 242 #if defined(KFONT_8X8) 243 fd = &font_info_8x8; 244 #else 245 fd = &font_info_8x16; 246 #endif 247 248 WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a); 249 WSeq(ba, SEQ_ID_MAP_MASK, 0x04); 250 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06); 251 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02); 252 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00); 253 WGfx(ba, GCT_ID_MISC, 0x0c); 254 255 /* 256 * load text font into beginning of display memory. Each 257 * character cell is 32 bytes long (enough for 4 planes) 258 */ 259 for (z = 0, c = fb; z < 256 * 32; z++) 260 *c++ = 0; 261 262 c = (unsigned char *) (fb) + (32 * fd->font_lo); 263 f = fd->font_p; 264 z = fd->font_lo; 265 for (; z <= fd->font_hi; z++, c += (32 - fd->height)) 266 for (y = 0; y < fd->height; y++) { 267 *c++ = *f++; 268 } 269 270 /* 271 * Odd/Even addressing 272 */ 273 WSeq(ba, SEQ_ID_MAP_MASK, 0x03); 274 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03); 275 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00); 276 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10); 277 WGfx(ba, GCT_ID_MISC, 0x0e); 278 279 /* 280 * Font height + underline location 281 */ 282 tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0; 283 WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1)); 284 tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0; 285 WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1)); 286 287 /* 288 * Cursor setup 289 */ 290 WCrt(ba, CRT_ID_CURSOR_START , 0x00); 291 WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1); 292 WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00); 293 WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00); 294 295 /* 296 * Enter text mode 297 */ 298 WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3); 299 WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a); 300 } 301
Indexes created Fri Oct 03 17:10:05 GMT 2025