grfabs_tt.c revision 1.10
1 /* $NetBSD: grfabs_tt.c,v 1.10 2002/03/04 15:35:57 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman. 5 * 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 by Leo Weppelman. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifdef TT_VIDEO 34 /* 35 * atari abstract graphics driver: TT-interface 36 */ 37 #include <sys/param.h> 38 #include <sys/queue.h> 39 #include <sys/malloc.h> 40 #include <sys/device.h> 41 #include <sys/systm.h> 42 43 #include <machine/iomap.h> 44 #include <machine/video.h> 45 #include <machine/mfp.h> 46 #include <atari/atari/device.h> 47 #include <atari/atari/stalloc.h> 48 #include <atari/dev/grfabs_reg.h> 49 #include <atari/dev/grfabs_tt.h> 50 51 /* 52 * Function decls 53 */ 54 static void init_view __P((view_t *, bmap_t *, dmode_t *, box_t *)); 55 static bmap_t *alloc_bitmap __P((u_long, u_long, u_char)); 56 static colormap_t *alloc_colormap __P((dmode_t *)); 57 static void free_bitmap __P((bmap_t *)); 58 static void tt_display_view __P((view_t *)); 59 static view_t *tt_alloc_view __P((dmode_t *, dimen_t *, u_char)); 60 static void tt_free_view __P((view_t *)); 61 static void tt_remove_view __P((view_t *)); 62 static void tt_save_view __P((view_t *)); 63 static int tt_use_colormap __P((view_t *, colormap_t *)); 64 65 /* 66 * Our function switch table 67 */ 68 struct grfabs_sw tt_vid_sw = { 69 tt_display_view, 70 tt_alloc_view, 71 tt_free_view, 72 tt_remove_view, 73 tt_save_view, 74 tt_use_colormap 75 }; 76 77 struct tt_hwregs { 78 u_short tt_reg; /* video mode-register TT */ 79 }; 80 #define vm_reg(dm) (((struct tt_hwregs*)(dm->data))->tt_reg) 81 82 /* 83 * Note that the order of this table *must* match the order of 84 * the table below! 85 */ 86 static struct tt_hwregs tt_hwregs[] = { 87 { RES_STHIGH }, 88 { RES_TTHIGH }, 89 { RES_STMID }, 90 { RES_STLOW }, 91 { RES_TTMID }, 92 { RES_TTLOW } 93 }; 94 95 static dmode_t vid_modes[] = { 96 { { NULL, NULL }, "sthigh", { 640, 400 }, 1, NULL, &tt_vid_sw }, 97 { { NULL, NULL }, "tthigh", { 1280, 960 }, 1, NULL, &tt_vid_sw }, 98 { { NULL, NULL }, "stmid", { 640, 200 }, 2, NULL, &tt_vid_sw }, 99 { { NULL, NULL }, "stlow", { 320, 200 }, 4, NULL, &tt_vid_sw }, 100 { { NULL, NULL }, "ttmid", { 640, 480 }, 4, NULL, &tt_vid_sw }, 101 { { NULL, NULL }, "ttlow", { 320, 480 }, 8, NULL, &tt_vid_sw }, 102 { { NULL, NULL }, NULL, } 103 }; 104 105 /* 106 * XXX: called from ite console init routine. 107 * Initialize list of possible video modes. 108 */ 109 110 void 111 tt_probe_video(modelp) 112 MODES *modelp; 113 { 114 dmode_t *dm; 115 int i; 116 int has_mono; 117 118 /* 119 * First find out what kind of monitor is attached. Dma-sound 120 * should be off because the 'sound-done' and 'monochrome-detect' 121 * are xor-ed together. I think that shutting it down here is the 122 * wrong place. 123 */ 124 has_mono = (MFP->mf_gpip & IA_MONO) == 0; 125 126 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { 127 dm->data = (void *)&tt_hwregs[i]; 128 if (has_mono && (vm_reg(dm) != RES_TTHIGH)) 129 continue; 130 if (!has_mono && (vm_reg(dm) == RES_TTHIGH)) 131 continue; 132 LIST_INSERT_HEAD(modelp, dm, link); 133 } 134 135 for (i=0; i < 16; i++) 136 VIDEO->vd_tt_rgb[i] = CM_L2TT(gra_def_color16[i]); 137 } 138 139 static void 140 tt_display_view(v) 141 view_t *v; 142 { 143 dmode_t *dm = v->mode; 144 bmap_t *bm = v->bitmap; 145 146 if (dm->current_view) { 147 /* 148 * Mark current view for this mode as no longer displayed 149 */ 150 dm->current_view->flags &= ~VF_DISPLAY; 151 } 152 dm->current_view = v; 153 v->flags |= VF_DISPLAY; 154 155 tt_use_colormap(v, v->colormap); 156 157 /* XXX: should use vbl for this */ 158 VIDEO->vd_tt_res = vm_reg(dm); 159 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; 160 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; 161 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; 162 } 163 164 void 165 tt_remove_view(v) 166 view_t *v; 167 { 168 dmode_t *mode = v->mode; 169 170 if (mode->current_view == v) { 171 #if 0 172 if (v->flags & VF_DISPLAY) 173 panic("Cannot shutdown display\n"); /* XXX */ 174 #endif 175 mode->current_view = NULL; 176 } 177 v->flags &= ~VF_DISPLAY; 178 } 179 180 void 181 tt_save_view(v) 182 view_t *v; 183 { 184 } 185 186 void 187 tt_free_view(v) 188 view_t *v; 189 { 190 if(v) { 191 tt_remove_view(v); 192 if (v->colormap != &gra_con_cmap) 193 free(v->colormap, M_DEVBUF); 194 free_bitmap(v->bitmap); 195 if (v != &gra_con_view) 196 free(v, M_DEVBUF); 197 } 198 } 199 200 static int 201 tt_use_colormap(v, cm) 202 view_t *v; 203 colormap_t *cm; 204 { 205 dmode_t *dm; 206 volatile u_short *creg; 207 u_long *src; 208 colormap_t *vcm; 209 u_long *vcreg; 210 u_short ncreg; 211 int i; 212 213 dm = v->mode; 214 vcm = v->colormap; 215 216 /* 217 * I guess it seems reasonable to require the maps to be 218 * of the same type... 219 */ 220 if (cm->type != vcm->type) 221 return(EINVAL); 222 223 /* 224 * First figure out where the actual colormap resides and 225 * howmany colors are in it. 226 */ 227 switch (vm_reg(dm)) { 228 case RES_STLOW: 229 creg = &VIDEO->vd_tt_rgb[0]; 230 ncreg = 16; 231 break; 232 case RES_STMID: 233 creg = &VIDEO->vd_tt_rgb[0]; 234 ncreg = 4; 235 break; 236 case RES_STHIGH: 237 creg = &VIDEO->vd_tt_rgb[254]; 238 ncreg = 2; 239 break; 240 case RES_TTLOW: 241 creg = &VIDEO->vd_tt_rgb[0]; 242 ncreg = 256; 243 break; 244 case RES_TTMID: 245 creg = &VIDEO->vd_tt_rgb[0]; 246 ncreg = 16; 247 break; 248 case RES_TTHIGH: 249 return(0); /* No colors */ 250 default: 251 panic("grf_tt:use_colormap: wrong mode!?"); 252 } 253 254 /* If first entry specified beyond capabilities -> error */ 255 if (cm->first >= ncreg) 256 return(EINVAL); 257 258 /* 259 * A little tricky, the actual colormap pointer will be NULL 260 * when view is not displaying, valid otherwise. 261 */ 262 if (v->flags & VF_DISPLAY) 263 creg = &creg[cm->first]; 264 else creg = NULL; 265 266 vcreg = &vcm->entry[cm->first]; 267 ncreg -= cm->first; 268 if (cm->size > ncreg) 269 return(EINVAL); 270 ncreg = cm->size; 271 272 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { 273 *vcreg = *src++; 274 275 /* 276 * If displaying, also update actual color registers. 277 */ 278 if (creg != NULL) 279 *creg++ = CM_L2TT(*vcreg); 280 } 281 return (0); 282 } 283 284 static view_t * 285 tt_alloc_view(mode, dim, depth) 286 dmode_t *mode; 287 dimen_t *dim; 288 u_char depth; 289 { 290 view_t *v; 291 bmap_t *bm; 292 293 if (!atari_realconfig) 294 v = &gra_con_view; 295 else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); 296 if(v == NULL) 297 return (NULL); 298 299 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); 300 if (bm) { 301 box_t box; 302 303 v->colormap = alloc_colormap(mode); 304 if (v->colormap) { 305 INIT_BOX(&box,0,0,mode->size.width,mode->size.height); 306 init_view(v, bm, mode, &box); 307 return (v); 308 } 309 free_bitmap(bm); 310 } 311 if (v != &gra_con_view) 312 free(v, M_DEVBUF); 313 return (NULL); 314 } 315 316 static void 317 init_view(v, bm, mode, dbox) 318 view_t *v; 319 bmap_t *bm; 320 dmode_t *mode; 321 box_t *dbox; 322 { 323 v->bitmap = bm; 324 v->mode = mode; 325 v->flags = 0; 326 bcopy(dbox, &v->display, sizeof(box_t)); 327 } 328 329 /* bitmap functions */ 330 331 static bmap_t * 332 alloc_bitmap(width, height, depth) 333 u_long width, height; 334 u_char depth; 335 { 336 u_long total_size, bm_size; 337 void *hw_address; 338 bmap_t *bm; 339 340 /* 341 * Sigh, it seems for mapping to work we need the bitplane data to 342 * 1: be aligned on a page boundry. 343 * 2: be n pages large. 344 * 345 * why? because the user gets a page aligned address, if this is before 346 * your allocation, too bad. Also it seems that the mapping routines 347 * do not watch to closely to the allowable length. so if you go over 348 * n pages by less than another page, the user gets to write all over 349 * the entire page. Since you did not allocate up to a page boundry 350 * (or more) the user writes into someone elses memory. -ch 351 */ 352 bm_size = m68k_round_page((width * height * depth) / NBBY); 353 total_size = bm_size + sizeof(bmap_t) + NBPG; 354 355 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) 356 return(NULL); 357 358 bm->plane = (u_char*)bm + sizeof(bmap_t); 359 bm->plane = (u_char*)m68k_round_page(bm->plane); 360 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); 361 bm->hw_address = (u_char*)m68k_round_page(bm->hw_address); 362 bm->bytes_per_row = (width * depth) / NBBY; 363 bm->rows = height; 364 bm->depth = depth; 365 bm->regs = NULL; 366 bm->hw_regs = NULL; 367 bm->reg_size = 0; 368 bm->phys_mappable = (depth * width * height) / NBBY; 369 bm->lin_base = 0; 370 bm->vga_address = NULL; 371 bm->vga_mappable = 0; 372 bm->vga_base = 0; 373 374 bzero(bm->plane, bm_size); 375 return (bm); 376 } 377 378 static void 379 free_bitmap(bm) 380 bmap_t *bm; 381 { 382 if (bm) 383 free_stmem(bm); 384 } 385 386 static colormap_t * 387 alloc_colormap(dm) 388 dmode_t *dm; 389 { 390 int nentries, i; 391 colormap_t *cm; 392 u_char type = CM_COLOR; 393 394 switch (vm_reg(dm)) { 395 case RES_STLOW: 396 case RES_TTMID: 397 nentries = 16; 398 break; 399 case RES_STMID: 400 nentries = 4; 401 break; 402 case RES_STHIGH: 403 nentries = 2; 404 break; 405 case RES_TTLOW: 406 nentries = 256; 407 break; 408 case RES_TTHIGH: 409 type = CM_MONO; 410 nentries = 0; 411 break; 412 default: 413 panic("grf_tt:alloc_colormap: wrong mode!?"); 414 } 415 if (!atari_realconfig) { 416 cm = &gra_con_cmap; 417 cm->entry = gra_con_colors; 418 } 419 else { 420 int size; 421 422 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); 423 cm = malloc(size, M_DEVBUF, M_NOWAIT); 424 if (cm == NULL) 425 return (NULL); 426 cm->entry = (long *)&cm[1]; 427 428 } 429 if ((cm->type = type) == CM_COLOR) 430 cm->red_mask = cm->green_mask = cm->blue_mask = 0xf; 431 cm->first = 0; 432 cm->size = nentries; 433 434 for (i = 0; i < nentries; i++) 435 cm->entry[i] = gra_def_color16[i % 16]; 436 return (cm); 437 } 438 #endif /* TT_VIDEO */ 439
Indexes created Fri Sep 26 08:10:20 GMT 2025