1 /* $NetBSD: pci_vga.c,v 1.21 2023/05/06 21:34:39 andvar 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: pci_vga.c,v 1.21 2023/05/06 21:34:39 andvar Exp $"); 29 30 #include <sys/param.h> 31 #include <sys/queue.h> 32 #include <sys/systm.h> 33 #include <dev/pci/pcireg.h> 34 #include <dev/pci/pcivar.h> 35 #include <dev/pci/pcidevs.h> 36 #include <atari/pci/pci_vga.h> 37 #include <atari/dev/grf_etreg.h> 38 #include <atari/include/iomap.h> 39 40 #include <atari/dev/font.h> 41 42 #include "vga_pci.h" 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 uint8_t *, uint8_t *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 /* attribute controller registers */ 59 static const uint8_t vga_atc[] = { 60 0x00, /* 00: internal palette 0 */ 61 0x01, /* 01: internal palette 1 */ 62 0x02, /* 02: internal palette 2 */ 63 0x03, /* 03: internal palette 3 */ 64 0x04, /* 04: internal palette 4 */ 65 0x05, /* 05: internal palette 5 */ 66 0x14, /* 06: internal palette 6 */ 67 0x07, /* 07: internal palette 7 */ 68 0x38, /* 08: internal palette 8 */ 69 0x39, /* 09: internal palette 9 */ 70 0x3a, /* 0A: internal palette 10 */ 71 0x3b, /* 0B: internal palette 11 */ 72 0x3c, /* 0C: internal palette 12 */ 73 0x3d, /* 0D: internal palette 13 */ 74 0x3e, /* 0E: internal palette 14 */ 75 0x3f, /* 0F: internal palette 15 */ 76 0x0c, /* 10: attribute mode control */ 77 0x00, /* 11: overscan color */ 78 0x0f, /* 12: color plane enable */ 79 0x08, /* 13: horizontal PEL panning */ 80 0x00 /* 14: color select */ 81 }; 82 83 /* video DAC palette registers */ 84 /* XXX only set up 16 colors used by internal palette in ATC registers */ 85 static const uint8_t vga_dacpal[] = { 86 /* R G B */ 87 0x00, 0x00, 0x00, /* BLACK */ 88 0x00, 0x00, 0x2a, /* BLUE */ 89 0x00, 0x2a, 0x00, /* GREEN */ 90 0x00, 0x2a, 0x2a, /* CYAN */ 91 0x2a, 0x00, 0x00, /* RED */ 92 0x2a, 0x00, 0x2a, /* MAGENTA */ 93 0x2a, 0x15, 0x00, /* BROWN */ 94 0x2a, 0x2a, 0x2a, /* LIGHTGREY */ 95 0x15, 0x15, 0x15, /* DARKGREY */ 96 0x15, 0x15, 0x3f, /* LIGHTBLUE */ 97 0x15, 0x3f, 0x15, /* LIGHTGREEN */ 98 0x15, 0x3f, 0x3f, /* LIGHTCYAN */ 99 0x3f, 0x15, 0x15, /* LIGHTRED */ 100 0x3f, 0x15, 0x3f, /* LIGHTMAGENTA */ 101 0x3f, 0x3f, 0x15, /* YELLOW */ 102 0x3f, 0x3f, 0x3f /* WHITE */ 103 }; 104 105 static bus_space_tag_t vga_iot, vga_memt; 106 static int tags_valid = 0; 107 108 #define VGA_REG_SIZE (8*1024) 109 #define VGA_FB_SIZE (32*1024) 110 111 /* 112 * Go look for a VGA card on the PCI-bus. This search is a 113 * stripped down version of the PCI-probe. It only looks on 114 * bus0 for VGA cards. The first card found is used. 115 */ 116 int 117 check_for_vga(bus_space_tag_t iot, bus_space_tag_t memt) 118 { 119 pci_chipset_tag_t pc = NULL; /* XXX */ 120 bus_space_handle_t ioh_regs, memh_fb; 121 pcitag_t tag; 122 int device, found, maxndevs, i; 123 int got_ioh, got_memh, rv; 124 uint32_t id, class; 125 volatile uint8_t *regs; 126 uint8_t *fb; 127 const char *nbd = "NetBSD/Atari"; 128 129 found = 0; 130 tag = 0; 131 id = 0; 132 rv = 0; 133 got_ioh = 0; 134 got_memh = 0; 135 maxndevs = pci_bus_maxdevs(pc, 0); 136 137 /* 138 * Map 8Kb of registers and 32Kb frame buffer. 139 * XXX: The way the registers are mapped here is plain wrong. 140 * We should try to pin-point the region down to 3[bcd]0 (see 141 * .../dev/ic/vga.c). 142 */ 143 if (bus_space_map(iot, 0, VGA_REG_SIZE, 0, &ioh_regs)) 144 return 0; 145 got_ioh = 1; 146 147 if (bus_space_map(memt, 0xa0000, VGA_FB_SIZE, 0, &memh_fb)) 148 goto bad; 149 got_memh = 1; 150 regs = bus_space_vaddr(iot, ioh_regs); 151 fb = bus_space_vaddr(memt, memh_fb); 152 153 for (device = 0; !found && (device < maxndevs); device++) { 154 155 tag = pci_make_tag(pc, 0, device, 0); 156 id = pci_conf_read(pc, tag, PCI_ID_REG); 157 if (id == 0 || id == 0xffffffff) 158 continue; 159 160 /* 161 * Check if we have some display device here... 162 */ 163 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 164 i = 0; 165 if (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC && 166 PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA) 167 i = 1; 168 if (PCI_CLASS(class) == PCI_CLASS_DISPLAY && 169 PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) 170 i = 1; 171 if (i == 0) 172 continue; 173 174 #if _MILANHW_ 175 /* Don't need to be more specific */ 176 milan_vga_init(pc, tag, id, regs, fb); 177 found = 1; 178 #else 179 switch (id = PCI_PRODUCT(id)) { 180 181 /* 182 * XXX Make the inclusion of the cases dependent 183 * on config options! 184 */ 185 case PCI_PRODUCT_TSENG_ET6000: 186 case PCI_PRODUCT_TSENG_ET4000_W32P_A: 187 case PCI_PRODUCT_TSENG_ET4000_W32P_B: 188 case PCI_PRODUCT_TSENG_ET4000_W32P_C: 189 case PCI_PRODUCT_TSENG_ET4000_W32P_D: 190 tseng_init(pc, tag, id, regs, fb); 191 found = 1; 192 break; 193 case PCI_PRODUCT_ATI_RAGE_PRO_PCI_P: 194 ati_vga_init(pc, tag, id, regs, fb); 195 found = 1; 196 break; 197 default: 198 break; 199 } 200 #endif /* _MILANHW_ */ 201 } 202 if (!found) 203 goto bad; 204 205 /* 206 * Assume the device is in CGA mode. Wscons expects this too... 207 */ 208 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 209 if (bus_space_map(memt, 0xb8000, VGA_FB_SIZE, 0, &memh_fb)) { 210 got_memh = 0; 211 goto bad; 212 } 213 fb = bus_space_vaddr(memt, memh_fb); 214 215 /* 216 * Generic parts of the initialization... 217 */ 218 219 /* set ATC registers */ 220 for (i = 0; i < 21; i++) 221 WAttr(regs, i, vga_atc[i]); 222 223 /* set DAC palette */ 224 for (i = 0; i < 16; i++) { 225 vgaw(regs, VDAC_ADDRESS_W, vga_atc[i]); 226 vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 0]); 227 vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 1]); 228 vgaw(regs, VDAC_DATA, vga_dacpal[i * 3 + 2]); 229 } 230 231 loadfont(regs, fb); 232 #if NVGA_PCI > 0 233 /* use explicit WSDISPLAY_FONTENC_IBM font that MI vga(4) assumes */ 234 vga_no_builtinfont = 1; 235 #endif 236 237 /* 238 * Clear the screen and print a message. The latter 239 * is of diagnostic/debug use only. 240 */ 241 for (i = 50 * 80; i >= 0; i -= 2) { 242 fb[i] = 0x20; fb[i+1] = 0x07; 243 } 244 for (i = 56; *nbd; i += 2) 245 fb[i] = *nbd++; 246 247 rv = 1; 248 vga_iot = iot; 249 vga_memt = memt; 250 rv = tags_valid = 1; 251 252 bad: 253 if (got_memh) 254 bus_space_unmap(memt, memh_fb, VGA_FB_SIZE); 255 if (got_ioh) 256 bus_space_unmap(iot, ioh_regs, VGA_REG_SIZE); 257 return rv; 258 } 259 260 #if NVGA_PCI > 0 261 void vgacnprobe(struct consdev *); 262 void vgacninit(struct consdev *); 263 264 void 265 vgacnprobe(struct consdev *cp) 266 { 267 268 if (tags_valid) 269 cp->cn_pri = CN_NORMAL; 270 } 271 272 void 273 vgacninit(struct consdev *cp) 274 { 275 276 if (tags_valid) { 277 /* XXX: Are those arguments correct? Leo */ 278 vga_cnattach(vga_iot, vga_memt, 8, 0); 279 } 280 } 281 #endif /* NVGA_PCI */ 282 283 /* 284 * Generic VGA. Load the configured kernel font into the videomemory and 285 * place the card into textmode. 286 */ 287 static void 288 loadfont(volatile uint8_t *ba, uint8_t *fb) 289 /* ba: Register area KVA */ 290 /* fb: Frame buffer KVA */ 291 { 292 font_info *fd; 293 uint8_t *c, *f, tmp; 294 uint16_t z, y; 295 296 #if defined(KFONT_8X8) 297 fd = &font_info_8x8; 298 #else 299 fd = &font_info_8x16; 300 #endif 301 302 WAttr(ba, 0x20 | ACT_ID_ATTR_MODE_CNTL, 0x0a); 303 WSeq(ba, SEQ_ID_MAP_MASK, 0x04); 304 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x06); 305 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x02); 306 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x00); 307 WGfx(ba, GCT_ID_MISC, 0x0c); 308 309 /* 310 * load text font into beginning of display memory. Each 311 * character cell is 32 bytes long (enough for 4 planes) 312 */ 313 for (z = 0, c = fb; z < 256 * 32; z++) 314 *c++ = 0; 315 316 c = (uint8_t *)(fb) + (32 * fd->font_lo); 317 f = fd->font_p; 318 z = fd->font_lo; 319 for (; z <= fd->font_hi; z++, c += (32 - fd->height)) 320 for (y = 0; y < fd->height; y++) { 321 *c++ = *f++; 322 } 323 324 /* 325 * Odd/Even addressing 326 */ 327 WSeq(ba, SEQ_ID_MAP_MASK, 0x03); 328 WSeq(ba, SEQ_ID_MEMORY_MODE, 0x03); 329 WGfx(ba, GCT_ID_READ_MAP_SELECT, 0x00); 330 WGfx(ba, GCT_ID_GRAPHICS_MODE, 0x10); 331 WGfx(ba, GCT_ID_MISC, 0x0e); 332 333 /* 334 * Font height + underline location 335 */ 336 tmp = RCrt(ba, CRT_ID_MAX_ROW_ADDRESS) & 0xe0; 337 WCrt(ba, CRT_ID_MAX_ROW_ADDRESS, tmp | (fd->height - 1)); 338 tmp = RCrt(ba, CRT_ID_UNDERLINE_LOC) & 0xe0; 339 WCrt(ba, CRT_ID_UNDERLINE_LOC, tmp | (fd->height - 1)); 340 341 /* 342 * Cursor setup 343 */ 344 WCrt(ba, CRT_ID_CURSOR_START , 0x00); 345 WCrt(ba, CRT_ID_CURSOR_END , fd->height - 1); 346 WCrt(ba, CRT_ID_CURSOR_LOC_HIGH, 0x00); 347 WCrt(ba, CRT_ID_CURSOR_LOC_LOW , 0x00); 348 349 /* 350 * Enter text mode 351 */ 352 WCrt(ba, CRT_ID_MODE_CONTROL , 0xa3); 353 WAttr(ba, ACT_ID_ATTR_MODE_CNTL | 0x20, 0x0a); 354 } 355
Indexes created Mon Sep 22 13:09:51 GMT 2025