grfabs_tt.c revision 1.2
1 /* $NetBSD: grfabs_tt.c,v 1.2 1996/02/22 10:11:25 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 #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/dev/grfabs_reg.h> 48 49 /* 50 * Function decls 51 */ 52 static void init_view __P((view_t *, bmap_t *, dmode_t *, box_t *)); 53 static bmap_t *alloc_bitmap __P((u_long, u_long, u_char)); 54 static colormap_t *alloc_colormap __P((dmode_t *)); 55 static void free_bitmap __P((bmap_t *)); 56 static void tt_display_view __P((view_t *)); 57 static view_t *tt_alloc_view __P((dmode_t *, dimen_t *, u_char)); 58 static void tt_free_view __P((view_t *)); 59 static void tt_remove_view __P((view_t *)); 60 static int tt_use_colormap __P((view_t *, colormap_t *)); 61 62 /* 63 * Our function switch table 64 */ 65 struct grfabs_sw tt_vid_sw = { 66 tt_display_view, 67 tt_alloc_view, 68 tt_free_view, 69 tt_remove_view, 70 tt_use_colormap 71 }; 72 73 static dmode_t vid_modes[] = { 74 { { NULL, NULL }, "sthigh", { 640, 400 }, 1, RES_STHIGH, &tt_vid_sw }, 75 { { NULL, NULL }, "tthigh", { 1280, 960 }, 1, RES_TTHIGH, &tt_vid_sw }, 76 { { NULL, NULL }, "stmid", { 640, 200 }, 2, RES_STMID , &tt_vid_sw }, 77 { { NULL, NULL }, "stlow", { 320, 200 }, 4, RES_STLOW , &tt_vid_sw }, 78 { { NULL, NULL }, "ttmid", { 640, 480 }, 4, RES_TTMID , &tt_vid_sw }, 79 { { NULL, NULL }, "ttlow", { 320, 480 }, 8, RES_TTLOW , &tt_vid_sw }, 80 { { NULL, NULL }, NULL, } 81 }; 82 83 /* 84 * XXX: called from ite console init routine. 85 * Initialize list of posible video modes. 86 */ 87 void 88 tt_probe_video(modelp) 89 MODES *modelp; 90 { 91 dmode_t *dm; 92 int i; 93 int has_mono; 94 95 /* 96 * First find out what kind of monitor is attached. Dma-sound 97 * should be off because the 'sound-done' and 'monochrome-detect' 98 * are xor-ed together. I think that shutting it down here is the 99 * wrong place. 100 */ 101 has_mono = (MFP->mf_gpip & IA_MONO) == 0; 102 103 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { 104 if (has_mono && (dm->vm_reg != RES_TTHIGH)) 105 continue; 106 if (!has_mono && (dm->vm_reg == RES_TTHIGH)) 107 continue; 108 LIST_INSERT_HEAD(modelp, dm, link); 109 } 110 111 for (i=0; i < 16; i++) 112 VIDEO->vd_tt_rgb[i] = CM_L2TT(gra_def_color16[i]); 113 } 114 115 static void 116 tt_display_view(v) 117 view_t *v; 118 { 119 dmode_t *dm = v->mode; 120 bmap_t *bm = v->bitmap; 121 122 if (dm->current_view) { 123 /* 124 * Mark current view for this mode as no longer displayed 125 */ 126 dm->current_view->flags &= ~VF_DISPLAY; 127 } 128 dm->current_view = v; 129 v->flags |= VF_DISPLAY; 130 131 tt_use_colormap(v, v->colormap); 132 133 /* XXX: should use vbl for this */ 134 VIDEO->vd_tt_res = dm->vm_reg; 135 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; 136 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; 137 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; 138 } 139 140 void 141 tt_remove_view(v) 142 view_t *v; 143 { 144 dmode_t *mode = v->mode; 145 146 if (mode->current_view == v) { 147 #if 0 148 if (v->flags & VF_DISPLAY) 149 panic("Cannot shutdown display\n"); /* XXX */ 150 #endif 151 mode->current_view = NULL; 152 } 153 v->flags &= ~VF_DISPLAY; 154 } 155 156 void 157 tt_free_view(v) 158 view_t *v; 159 { 160 if(v) { 161 tt_remove_view(v); 162 if (v->colormap != &gra_con_cmap) 163 free(v->colormap, M_DEVBUF); 164 free_bitmap(v->bitmap); 165 if (v != &gra_con_view) 166 free(v, M_DEVBUF); 167 } 168 } 169 170 static int 171 tt_use_colormap(v, cm) 172 view_t *v; 173 colormap_t *cm; 174 { 175 dmode_t *dm; 176 volatile u_short *creg; 177 u_long *src; 178 colormap_t *vcm; 179 u_long *vcreg; 180 u_short ncreg; 181 int i; 182 183 dm = v->mode; 184 vcm = v->colormap; 185 186 /* 187 * I guess it seems reasonable to require the maps to be 188 * of the same type... 189 */ 190 if (cm->type != vcm->type) 191 return(EINVAL); 192 193 /* 194 * First figure out where the actual colormap resides and 195 * howmany colors are in it. 196 */ 197 switch (dm->vm_reg) { 198 case RES_STLOW: 199 creg = &VIDEO->vd_tt_rgb[0]; 200 ncreg = 16; 201 break; 202 case RES_STMID: 203 creg = &VIDEO->vd_tt_rgb[0]; 204 ncreg = 4; 205 break; 206 case RES_STHIGH: 207 creg = &VIDEO->vd_tt_rgb[254]; 208 ncreg = 2; 209 break; 210 case RES_TTLOW: 211 creg = &VIDEO->vd_tt_rgb[0]; 212 ncreg = 256; 213 break; 214 case RES_TTMID: 215 creg = &VIDEO->vd_tt_rgb[0]; 216 ncreg = 16; 217 break; 218 case RES_TTHIGH: 219 return(0); /* No colors */ 220 default: 221 panic("grf_tt:use_colormap: wrong mode!?"); 222 } 223 224 /* If first entry specified beyond capabilities -> error */ 225 if (cm->first >= ncreg) 226 return(EINVAL); 227 228 /* 229 * A little tricky, the actual colormap pointer will be NULL 230 * when view is not displaying, valid otherwise. 231 */ 232 if (v->flags & VF_DISPLAY) 233 creg = &creg[cm->first]; 234 else creg = NULL; 235 236 vcreg = &vcm->entry[cm->first]; 237 ncreg -= cm->first; 238 if (cm->size > ncreg) 239 return(EINVAL); 240 ncreg = cm->size; 241 242 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { 243 *vcreg = *src++; 244 245 /* 246 * If displaying, also update actual color registers. 247 */ 248 if (creg != NULL) 249 *creg++ = CM_L2TT(*vcreg); 250 } 251 return (0); 252 } 253 254 static view_t * 255 tt_alloc_view(mode, dim, depth) 256 dmode_t *mode; 257 dimen_t *dim; 258 u_char depth; 259 { 260 view_t *v; 261 bmap_t *bm; 262 263 if (!atari_realconfig) 264 v = &gra_con_view; 265 else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); 266 if(v == NULL) 267 return (NULL); 268 269 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); 270 if (bm) { 271 box_t box; 272 273 v->colormap = alloc_colormap(mode); 274 if (v->colormap) { 275 INIT_BOX(&box,0,0,mode->size.width,mode->size.height); 276 init_view(v, bm, mode, &box); 277 return (v); 278 } 279 free_bitmap(bm); 280 } 281 if (v != &gra_con_view) 282 free(v, M_DEVBUF); 283 return (NULL); 284 } 285 286 static void 287 init_view(v, bm, mode, dbox) 288 view_t *v; 289 bmap_t *bm; 290 dmode_t *mode; 291 box_t *dbox; 292 { 293 v->bitmap = bm; 294 v->mode = mode; 295 v->flags = 0; 296 bcopy(dbox, &v->display, sizeof(box_t)); 297 } 298 299 /* bitmap functions */ 300 301 static bmap_t * 302 alloc_bitmap(width, height, depth) 303 u_long width, height; 304 u_char depth; 305 { 306 u_long total_size, bm_size; 307 void *hw_address; 308 bmap_t *bm; 309 310 /* 311 * Sigh, it seems for mapping to work we need the bitplane data to 312 * 1: be aligned on a page boundry. 313 * 2: be n pages large. 314 * 315 * why? because the user gets a page aligned address, if this is before 316 * your allocation, too bad. Also it seems that the mapping routines 317 * do not watch to closely to the allowable length. so if you go over 318 * n pages by less than another page, the user gets to write all over 319 * the entire page. Since you did not allocate up to a page boundry 320 * (or more) the user writes into someone elses memory. -ch 321 */ 322 bm_size = atari_round_page((width * height * depth) / NBBY); 323 total_size = bm_size + sizeof(bmap_t) + NBPG; 324 325 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) 326 return(NULL); 327 328 bm->plane = (u_char*)bm + sizeof(bmap_t); 329 bm->plane = (u_char*)atari_round_page(bm->plane); 330 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); 331 bm->hw_address = (u_char*)atari_round_page(bm->hw_address); 332 bm->bytes_per_row = (width * depth) / NBBY; 333 bm->rows = height; 334 bm->depth = depth; 335 336 bzero(bm->plane, bm_size); 337 return (bm); 338 } 339 340 static void 341 free_bitmap(bm) 342 bmap_t *bm; 343 { 344 if (bm) 345 free_stmem(bm); 346 } 347 348 static colormap_t * 349 alloc_colormap(dm) 350 dmode_t *dm; 351 { 352 int nentries, i; 353 colormap_t *cm; 354 u_char type = CM_COLOR; 355 356 switch (dm->vm_reg) { 357 case RES_STLOW: 358 case RES_TTMID: 359 nentries = 16; 360 break; 361 case RES_STMID: 362 nentries = 4; 363 break; 364 case RES_STHIGH: 365 nentries = 2; 366 break; 367 case RES_TTLOW: 368 nentries = 256; 369 break; 370 case RES_TTHIGH: 371 type = CM_MONO; 372 nentries = 0; 373 break; 374 default: 375 panic("grf_tt:alloc_colormap: wrong mode!?"); 376 } 377 if (!atari_realconfig) { 378 cm = &gra_con_cmap; 379 cm->entry = gra_con_colors; 380 } 381 else { 382 int size; 383 384 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); 385 cm = malloc(size, M_DEVBUF, M_NOWAIT); 386 if (cm == NULL) 387 return (NULL); 388 cm->entry = (long *)&cm[1]; 389 390 } 391 if ((cm->type = type) == CM_COLOR) 392 cm->red_mask = cm->green_mask = cm->blue_mask = 0xf; 393 cm->first = 0; 394 cm->size = nentries; 395 396 for (i = 0; i < nentries; i++) 397 cm->entry[i] = gra_def_color16[i % 16]; 398 return (cm); 399 } 400 #endif /* TT_VIDEO */ 401
Indexes created Thu Sep 25 16:09:42 GMT 2025