grfabs_tt.c revision 1.1
1 /* $NetBSD: grfabs_tt.c,v 1.1 1995/08/20 18:17:34 leo 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 42 #include <machine/iomap.h> 43 #include <machine/video.h> 44 #include <machine/mfp.h> 45 #include <atari/atari/device.h> 46 #include <atari/dev/grfabs_reg.h> 47 48 /* 49 * Function decls 50 */ 51 static void init_view __P((view_t *, bmap_t *, dmode_t *, box_t *)); 52 static bmap_t *alloc_bitmap __P((u_long, u_long, u_char)); 53 static colormap_t *alloc_colormap __P((dmode_t *)); 54 static void free_bitmap __P((bmap_t *)); 55 static void tt_display_view __P((view_t *)); 56 static view_t *tt_alloc_view __P((dmode_t *, dimen_t *, u_char)); 57 static void tt_free_view __P((view_t *)); 58 static void tt_remove_view __P((view_t *)); 59 static int tt_use_colormap __P((view_t *, colormap_t *)); 60 61 /* 62 * Our function switch table 63 */ 64 struct grfabs_sw tt_vid_sw = { 65 tt_display_view, 66 tt_alloc_view, 67 tt_free_view, 68 tt_remove_view, 69 tt_use_colormap 70 }; 71 72 static dmode_t vid_modes[] = { 73 { { NULL, NULL }, "sthigh", { 640, 400 }, 1, RES_STHIGH, &tt_vid_sw }, 74 { { NULL, NULL }, "tthigh", { 1280, 960 }, 1, RES_TTHIGH, &tt_vid_sw }, 75 { { NULL, NULL }, "stmid", { 640, 200 }, 2, RES_STMID , &tt_vid_sw }, 76 { { NULL, NULL }, "stlow", { 320, 200 }, 4, RES_STLOW , &tt_vid_sw }, 77 { { NULL, NULL }, "ttmid", { 640, 480 }, 4, RES_TTMID , &tt_vid_sw }, 78 { { NULL, NULL }, "ttlow", { 320, 480 }, 8, RES_TTLOW , &tt_vid_sw }, 79 { { NULL, NULL }, NULL, } 80 }; 81 82 /* 83 * XXX: called from ite console init routine. 84 * Initialize list of posible video modes. 85 */ 86 void 87 tt_probe_video(modelp) 88 MODES *modelp; 89 { 90 dmode_t *dm; 91 int i; 92 int has_mono; 93 94 /* 95 * First find out what kind of monitor is attached. Dma-sound 96 * should be off because the 'sound-done' and 'monochrome-detect' 97 * are xor-ed together. I think that shutting it down here is the 98 * wrong place. 99 */ 100 has_mono = (MFP->mf_gpip & IA_MONO) == 0; 101 102 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { 103 if (has_mono && (dm->vm_reg != RES_TTHIGH)) 104 continue; 105 if (!has_mono && (dm->vm_reg == RES_TTHIGH)) 106 continue; 107 LIST_INSERT_HEAD(modelp, dm, link); 108 } 109 110 for (i=0; i < 16; i++) 111 VIDEO->vd_tt_rgb[i] = CM_L2TT(gra_def_color16[i]); 112 } 113 114 static void 115 tt_display_view(v) 116 view_t *v; 117 { 118 dmode_t *dm = v->mode; 119 bmap_t *bm = v->bitmap; 120 121 if (dm->current_view) { 122 /* 123 * Mark current view for this mode as no longer displayed 124 */ 125 dm->current_view->flags &= ~VF_DISPLAY; 126 } 127 dm->current_view = v; 128 v->flags |= VF_DISPLAY; 129 130 tt_use_colormap(v, v->colormap); 131 132 /* XXX: should use vbl for this */ 133 VIDEO->vd_tt_res = dm->vm_reg; 134 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; 135 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; 136 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; 137 } 138 139 void 140 tt_remove_view(v) 141 view_t *v; 142 { 143 dmode_t *mode = v->mode; 144 145 if (mode->current_view == v) { 146 #if 0 147 if (v->flags & VF_DISPLAY) 148 panic("Cannot shutdown display\n"); /* XXX */ 149 #endif 150 mode->current_view = NULL; 151 } 152 v->flags &= ~VF_DISPLAY; 153 } 154 155 void 156 tt_free_view(v) 157 view_t *v; 158 { 159 if(v) { 160 dmode_t *md = v->mode; 161 162 tt_remove_view(v); 163 if (v->colormap != &gra_con_cmap) 164 free(v->colormap, M_DEVBUF); 165 free_bitmap(v->bitmap); 166 if (v != &gra_con_view) 167 free(v, M_DEVBUF); 168 } 169 } 170 171 static int 172 tt_use_colormap(v, cm) 173 view_t *v; 174 colormap_t *cm; 175 { 176 dmode_t *dm; 177 volatile u_short *creg; 178 u_long *src; 179 colormap_t *vcm; 180 u_long *vcreg; 181 u_short ncreg; 182 int i; 183 184 dm = v->mode; 185 vcm = v->colormap; 186 187 /* 188 * I guess it seems reasonable to require the maps to be 189 * of the same type... 190 */ 191 if (cm->type != vcm->type) 192 return(EINVAL); 193 194 /* 195 * First figure out where the actual colormap resides and 196 * howmany colors are in it. 197 */ 198 switch (dm->vm_reg) { 199 case RES_STLOW: 200 creg = &VIDEO->vd_tt_rgb[0]; 201 ncreg = 16; 202 break; 203 case RES_STMID: 204 creg = &VIDEO->vd_tt_rgb[0]; 205 ncreg = 4; 206 break; 207 case RES_STHIGH: 208 creg = &VIDEO->vd_tt_rgb[254]; 209 ncreg = 2; 210 break; 211 case RES_TTLOW: 212 creg = &VIDEO->vd_tt_rgb[0]; 213 ncreg = 256; 214 break; 215 case RES_TTMID: 216 creg = &VIDEO->vd_tt_rgb[0]; 217 ncreg = 16; 218 break; 219 case RES_TTHIGH: 220 return(0); /* No colors */ 221 default: 222 panic("grf_tt:use_colormap: wrong mode!?"); 223 } 224 225 /* If first entry specified beyond capabilities -> error */ 226 if (cm->first >= ncreg) 227 return(EINVAL); 228 229 /* 230 * A little tricky, the actual colormap pointer will be NULL 231 * when view is not displaying, valid otherwise. 232 */ 233 if (v->flags & VF_DISPLAY) 234 creg = &creg[cm->first]; 235 else creg = NULL; 236 237 vcreg = &vcm->entry[cm->first]; 238 ncreg -= cm->first; 239 if (cm->size > ncreg) 240 return(EINVAL); 241 ncreg = cm->size; 242 243 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { 244 *vcreg = *src++; 245 246 /* 247 * If displaying, also update actual color registers. 248 */ 249 if (creg != NULL) 250 *creg++ = CM_L2TT(*vcreg); 251 } 252 return (0); 253 } 254 255 static view_t * 256 tt_alloc_view(mode, dim, depth) 257 dmode_t *mode; 258 dimen_t *dim; 259 u_char depth; 260 { 261 view_t *v; 262 bmap_t *bm; 263 264 if (!atari_realconfig) 265 v = &gra_con_view; 266 else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); 267 if(v == NULL) 268 return (NULL); 269 270 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); 271 if (bm) { 272 box_t box; 273 274 v->colormap = alloc_colormap(mode); 275 if (v->colormap) { 276 INIT_BOX(&box,0,0,mode->size.width,mode->size.height); 277 init_view(v, bm, mode, &box); 278 return (v); 279 } 280 free_bitmap(bm); 281 } 282 if (v != &gra_con_view) 283 free(v, M_DEVBUF); 284 return (NULL); 285 } 286 287 static void 288 init_view(v, bm, mode, dbox) 289 view_t *v; 290 bmap_t *bm; 291 dmode_t *mode; 292 box_t *dbox; 293 { 294 v->bitmap = bm; 295 v->mode = mode; 296 v->flags = 0; 297 bcopy(dbox, &v->display, sizeof(box_t)); 298 } 299 300 /* bitmap functions */ 301 302 static bmap_t * 303 alloc_bitmap(width, height, depth) 304 u_long width, height; 305 u_char depth; 306 { 307 int i; 308 u_long total_size, bm_size; 309 void *hw_address; 310 bmap_t *bm; 311 312 /* 313 * Sigh, it seems for mapping to work we need the bitplane data to 314 * 1: be aligned on a page boundry. 315 * 2: be n pages large. 316 * 317 * why? because the user gets a page aligned address, if this is before 318 * your allocation, too bad. Also it seems that the mapping routines 319 * do not watch to closely to the allowable length. so if you go over 320 * n pages by less than another page, the user gets to write all over 321 * the entire page. Since you did not allocate up to a page boundry 322 * (or more) the user writes into someone elses memory. -ch 323 */ 324 bm_size = atari_round_page((width * height * depth) / NBBY); 325 total_size = bm_size + sizeof(bmap_t) + NBPG; 326 327 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) 328 return(NULL); 329 330 bm->plane = (u_char*)bm + sizeof(bmap_t); 331 bm->plane = (u_char*)atari_round_page(bm->plane); 332 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); 333 bm->hw_address = (u_char*)atari_round_page(bm->hw_address); 334 bm->bytes_per_row = (width * depth) / NBBY; 335 bm->rows = height; 336 bm->depth = depth; 337 338 bzero(bm->plane, bm_size); 339 return (bm); 340 } 341 342 static void 343 free_bitmap(bm) 344 bmap_t *bm; 345 { 346 if (bm) 347 free_stmem(bm); 348 } 349 350 static colormap_t * 351 alloc_colormap(dm) 352 dmode_t *dm; 353 { 354 int nentries, i; 355 colormap_t *cm; 356 u_char type = CM_COLOR; 357 358 switch (dm->vm_reg) { 359 case RES_STLOW: 360 case RES_TTMID: 361 nentries = 16; 362 break; 363 case RES_STMID: 364 nentries = 4; 365 break; 366 case RES_STHIGH: 367 nentries = 2; 368 break; 369 case RES_TTLOW: 370 nentries = 256; 371 break; 372 case RES_TTHIGH: 373 type = CM_MONO; 374 nentries = 0; 375 break; 376 default: 377 panic("grf_tt:alloc_colormap: wrong mode!?"); 378 } 379 if (!atari_realconfig) { 380 cm = &gra_con_cmap; 381 cm->entry = gra_con_colors; 382 } 383 else { 384 int size; 385 386 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); 387 cm = malloc(size, M_DEVBUF, M_NOWAIT); 388 if (cm == NULL) 389 return (NULL); 390 cm->entry = (long *)&cm[1]; 391 392 } 393 if ((cm->type = type) == CM_COLOR) 394 cm->red_mask = cm->green_mask = cm->blue_mask = 0xf; 395 cm->first = 0; 396 cm->size = nentries; 397 398 for (i = 0; i < nentries; i++) 399 cm->entry[i] = gra_def_color16[i % 16]; 400 return (cm); 401 } 402 #endif /* TT_VIDEO */ 403
Indexes created Fri Sep 26 20:09:58 GMT 2025