grfabs_tt.c revision 1.19
1 /* $NetBSD: grfabs_tt.c,v 1.19 2009/03/18 16:00:10 cegger 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 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: grfabs_tt.c,v 1.19 2009/03/18 16:00:10 cegger Exp $"); 35 36 #ifdef TT_VIDEO 37 /* 38 * atari abstract graphics driver: TT-interface 39 */ 40 #include <sys/param.h> 41 #include <sys/queue.h> 42 #include <sys/malloc.h> 43 #include <sys/device.h> 44 #include <sys/systm.h> 45 46 #include <uvm/uvm_extern.h> 47 48 #include <machine/iomap.h> 49 #include <machine/video.h> 50 #include <machine/mfp.h> 51 #include <atari/atari/device.h> 52 #include <atari/atari/stalloc.h> 53 #include <atari/dev/grfabs_reg.h> 54 #include <atari/dev/grfabs_tt.h> 55 56 /* 57 * Function decls 58 */ 59 static void init_view(view_t *, bmap_t *, dmode_t *, box_t *); 60 static bmap_t *alloc_bitmap(u_long, u_long, u_char); 61 static colormap_t *alloc_colormap(dmode_t *); 62 static void free_bitmap(bmap_t *); 63 static void tt_display_view(view_t *); 64 static view_t *tt_alloc_view(dmode_t *, dimen_t *, u_char); 65 static void tt_free_view(view_t *); 66 static void tt_remove_view(view_t *); 67 static void tt_save_view(view_t *); 68 static int tt_use_colormap(view_t *, colormap_t *); 69 70 /* 71 * Our function switch table 72 */ 73 struct grfabs_sw tt_vid_sw = { 74 tt_display_view, 75 tt_alloc_view, 76 tt_free_view, 77 tt_remove_view, 78 tt_save_view, 79 tt_use_colormap 80 }; 81 82 struct tt_hwregs { 83 u_short tt_reg; /* video mode-register TT */ 84 }; 85 #define vm_reg(dm) (((struct tt_hwregs*)(dm->data))->tt_reg) 86 87 /* 88 * Note that the order of this table *must* match the order of 89 * the table below! 90 */ 91 static struct tt_hwregs tt_hwregs[] = { 92 { RES_STHIGH }, 93 { RES_TTHIGH }, 94 { RES_STMID }, 95 { RES_STLOW }, 96 { RES_TTMID }, 97 { RES_TTLOW } 98 }; 99 100 static dmode_t vid_modes[] = { 101 { { NULL, NULL }, "sthigh", { 640, 400 }, 1, NULL, &tt_vid_sw }, 102 { { NULL, NULL }, "tthigh", { 1280, 960 }, 1, NULL, &tt_vid_sw }, 103 { { NULL, NULL }, "stmid", { 640, 200 }, 2, NULL, &tt_vid_sw }, 104 { { NULL, NULL }, "stlow", { 320, 200 }, 4, NULL, &tt_vid_sw }, 105 { { NULL, NULL }, "ttmid", { 640, 480 }, 4, NULL, &tt_vid_sw }, 106 { { NULL, NULL }, "ttlow", { 320, 480 }, 8, NULL, &tt_vid_sw }, 107 { { NULL, NULL }, NULL, } 108 }; 109 110 /* 111 * XXX: called from ite console init routine. 112 * Initialize list of possible video modes. 113 */ 114 115 void 116 tt_probe_video(MODES *modelp) 117 { 118 dmode_t *dm; 119 int i; 120 int has_mono; 121 122 /* 123 * First find out what kind of monitor is attached. DMA-sound 124 * should be off because the 'sound-done' and 'monochrome-detect' 125 * are xor-ed together. I think that shutting it down here is the 126 * wrong place. 127 */ 128 has_mono = (MFP->mf_gpip & IA_MONO) == 0; 129 130 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { 131 dm->data = (void *)&tt_hwregs[i]; 132 if (has_mono && (vm_reg(dm) != RES_TTHIGH)) 133 continue; 134 if (!has_mono && (vm_reg(dm) == RES_TTHIGH)) 135 continue; 136 LIST_INSERT_HEAD(modelp, dm, link); 137 } 138 139 for (i=0; i < 16; i++) 140 VIDEO->vd_tt_rgb[i] = CM_L2TT(gra_def_color16[i]); 141 } 142 143 static void 144 tt_display_view(view_t *v) 145 { 146 dmode_t *dm = v->mode; 147 bmap_t *bm = v->bitmap; 148 149 if (dm->current_view) { 150 /* 151 * Mark current view for this mode as no longer displayed 152 */ 153 dm->current_view->flags &= ~VF_DISPLAY; 154 } 155 dm->current_view = v; 156 v->flags |= VF_DISPLAY; 157 158 tt_use_colormap(v, v->colormap); 159 160 /* XXX: should use vbl for this */ 161 VIDEO->vd_tt_res = vm_reg(dm); 162 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; 163 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; 164 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; 165 } 166 167 void 168 tt_remove_view(view_t *v) 169 { 170 dmode_t *mode = v->mode; 171 172 if (mode->current_view == v) { 173 #if 0 174 if (v->flags & VF_DISPLAY) 175 panic("Cannot shutdown display"); /* XXX */ 176 #endif 177 mode->current_view = NULL; 178 } 179 v->flags &= ~VF_DISPLAY; 180 } 181 182 void 183 tt_save_view(view_t *v) 184 { 185 } 186 187 void 188 tt_free_view(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(view_t *v, colormap_t *cm) 202 { 203 dmode_t *dm; 204 volatile u_short *creg; 205 u_long *src; 206 colormap_t *vcm; 207 u_long *vcreg; 208 u_short ncreg; 209 int i; 210 211 dm = v->mode; 212 vcm = v->colormap; 213 214 /* 215 * I guess it seems reasonable to require the maps to be 216 * of the same type... 217 */ 218 if (cm->type != vcm->type) 219 return(EINVAL); 220 221 /* 222 * First figure out where the actual colormap resides and 223 * howmany colors are in it. 224 */ 225 switch (vm_reg(dm)) { 226 case RES_STLOW: 227 creg = &VIDEO->vd_tt_rgb[0]; 228 ncreg = 16; 229 break; 230 case RES_STMID: 231 creg = &VIDEO->vd_tt_rgb[0]; 232 ncreg = 4; 233 break; 234 case RES_STHIGH: 235 creg = &VIDEO->vd_tt_rgb[254]; 236 ncreg = 2; 237 break; 238 case RES_TTLOW: 239 creg = &VIDEO->vd_tt_rgb[0]; 240 ncreg = 256; 241 break; 242 case RES_TTMID: 243 creg = &VIDEO->vd_tt_rgb[0]; 244 ncreg = 16; 245 break; 246 case RES_TTHIGH: 247 return(0); /* No colors */ 248 default: 249 panic("grf_tt:use_colormap: wrong mode!?"); 250 } 251 252 /* If first entry specified beyond capabilities -> error */ 253 if (cm->first >= ncreg) 254 return(EINVAL); 255 256 /* 257 * A little tricky, the actual colormap pointer will be NULL 258 * when view is not displaying, valid otherwise. 259 */ 260 if (v->flags & VF_DISPLAY) 261 creg = &creg[cm->first]; 262 else creg = NULL; 263 264 vcreg = &vcm->entry[cm->first]; 265 ncreg -= cm->first; 266 if (cm->size > ncreg) 267 return(EINVAL); 268 ncreg = cm->size; 269 270 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { 271 *vcreg = *src++; 272 273 /* 274 * If displaying, also update actual color registers. 275 */ 276 if (creg != NULL) 277 *creg++ = CM_L2TT(*vcreg); 278 } 279 return (0); 280 } 281 282 static view_t * 283 tt_alloc_view(dmode_t *mode, dimen_t *dim, u_char depth) 284 { 285 view_t *v; 286 bmap_t *bm; 287 288 if (!atari_realconfig) 289 v = &gra_con_view; 290 else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); 291 if(v == NULL) 292 return (NULL); 293 294 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); 295 if (bm) { 296 box_t box; 297 298 v->colormap = alloc_colormap(mode); 299 if (v->colormap) { 300 INIT_BOX(&box,0,0,mode->size.width,mode->size.height); 301 init_view(v, bm, mode, &box); 302 return (v); 303 } 304 free_bitmap(bm); 305 } 306 if (v != &gra_con_view) 307 free(v, M_DEVBUF); 308 return (NULL); 309 } 310 311 static void 312 init_view(view_t *v, bmap_t *bm, dmode_t *mode, box_t *dbox) 313 { 314 v->bitmap = bm; 315 v->mode = mode; 316 v->flags = 0; 317 bcopy(dbox, &v->display, sizeof(box_t)); 318 } 319 320 /* bitmap functions */ 321 322 static bmap_t * 323 alloc_bitmap(u_long width, u_long height, u_char depth) 324 { 325 u_long total_size, bm_size; 326 void *hw_address; 327 bmap_t *bm; 328 329 /* 330 * Sigh, it seems for mapping to work we need the bitplane data to 331 * 1: be aligned on a page boundry. 332 * 2: be n pages large. 333 * 334 * why? because the user gets a page aligned address, if this is before 335 * your allocation, too bad. Also it seems that the mapping routines 336 * do not watch to closely to the allowable length. so if you go over 337 * n pages by less than another page, the user gets to write all over 338 * the entire page. Since you did not allocate up to a page boundry 339 * (or more) the user writes into someone elses memory. -ch 340 */ 341 bm_size = m68k_round_page((width * height * depth) / NBBY); 342 total_size = bm_size + sizeof(bmap_t) + PAGE_SIZE; 343 344 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) 345 return(NULL); 346 347 bm->plane = (u_char*)bm + sizeof(bmap_t); 348 bm->plane = (u_char*)m68k_round_page(bm->plane); 349 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); 350 bm->hw_address = (u_char*)m68k_round_page(bm->hw_address); 351 bm->bytes_per_row = (width * depth) / NBBY; 352 bm->rows = height; 353 bm->depth = depth; 354 bm->regs = NULL; 355 bm->hw_regs = NULL; 356 bm->reg_size = 0; 357 bm->phys_mappable = (depth * width * height) / NBBY; 358 bm->lin_base = 0; 359 bm->vga_address = NULL; 360 bm->vga_mappable = 0; 361 bm->vga_base = 0; 362 363 memset(bm->plane, 0, bm_size); 364 return (bm); 365 } 366 367 static void 368 free_bitmap(bmap_t *bm) 369 { 370 if (bm) 371 free_stmem(bm); 372 } 373 374 static colormap_t * 375 alloc_colormap(dmode_t *dm) 376 { 377 int nentries, i; 378 colormap_t *cm; 379 u_char type = CM_COLOR; 380 381 switch (vm_reg(dm)) { 382 case RES_STLOW: 383 case RES_TTMID: 384 nentries = 16; 385 break; 386 case RES_STMID: 387 nentries = 4; 388 break; 389 case RES_STHIGH: 390 nentries = 2; 391 break; 392 case RES_TTLOW: 393 nentries = 256; 394 break; 395 case RES_TTHIGH: 396 type = CM_MONO; 397 nentries = 0; 398 break; 399 default: 400 panic("grf_tt:alloc_colormap: wrong mode!?"); 401 } 402 if (!atari_realconfig) { 403 cm = &gra_con_cmap; 404 cm->entry = gra_con_colors; 405 } 406 else { 407 int size; 408 409 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); 410 cm = malloc(size, M_DEVBUF, M_NOWAIT); 411 if (cm == NULL) 412 return (NULL); 413 cm->entry = (long *)&cm[1]; 414 415 } 416 if ((cm->type = type) == CM_COLOR) 417 cm->red_mask = cm->green_mask = cm->blue_mask = 0xf; 418 cm->first = 0; 419 cm->size = nentries; 420 421 for (i = 0; i < nentries; i++) 422 cm->entry[i] = gra_def_color16[i % 16]; 423 return (cm); 424 } 425 #endif /* TT_VIDEO */ 426
Indexes created Fri Sep 26 08:10:20 GMT 2025