1 /* $NetBSD: grfabs_tt.c,v 1.25 2023/01/06 10:28:28 tsutsui 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: grfabs_tt.c,v 1.25 2023/01/06 10:28:28 tsutsui Exp $"); 30 31 #ifdef TT_VIDEO 32 /* 33 * atari abstract graphics driver: TT-interface 34 */ 35 #include <sys/param.h> 36 #include <sys/queue.h> 37 #include <sys/malloc.h> 38 #include <sys/device.h> 39 #include <sys/systm.h> 40 41 #include <uvm/uvm_extern.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(view_t *, bmap_t *, dmode_t *, box_t *); 55 static bmap_t *alloc_bitmap(u_long, u_long, u_char); 56 static colormap_t *alloc_colormap(dmode_t *); 57 static void free_bitmap(bmap_t *); 58 static void tt_display_view(view_t *); 59 static view_t *tt_alloc_view(dmode_t *, dimen_t *, u_char); 60 static void tt_free_view(view_t *); 61 static void tt_remove_view(view_t *); 62 static void tt_save_view(view_t *); 63 static int tt_use_colormap(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(MODES *modelp) 112 { 113 dmode_t *dm; 114 int i; 115 int has_mono; 116 117 /* 118 * First find out what kind of monitor is attached. DMA-sound 119 * should be off because the 'sound-done' and 'monochrome-detect' 120 * are xor-ed together. I think that shutting it down here is the 121 * wrong place. 122 */ 123 has_mono = (MFP->mf_gpip & IA_MONO) == 0; 124 125 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { 126 dm->data = (void *)&tt_hwregs[i]; 127 if (has_mono && (vm_reg(dm) != RES_TTHIGH)) 128 continue; 129 if (!has_mono && (vm_reg(dm) == RES_TTHIGH)) 130 continue; 131 LIST_INSERT_HEAD(modelp, dm, link); 132 } 133 134 for (i=0; i < 16; i++) 135 VIDEO->vd_tt_rgb[i] = CM_L2TT(gra_def_color16[i]); 136 } 137 138 static void 139 tt_display_view(view_t *v) 140 { 141 dmode_t *dm = v->mode; 142 bmap_t *bm = v->bitmap; 143 144 if (dm->current_view) { 145 /* 146 * Mark current view for this mode as no longer displayed 147 */ 148 dm->current_view->flags &= ~VF_DISPLAY; 149 } 150 dm->current_view = v; 151 v->flags |= VF_DISPLAY; 152 153 tt_use_colormap(v, v->colormap); 154 155 /* XXX: should use vbl for this */ 156 VIDEO->vd_tt_res = vm_reg(dm); 157 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; 158 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; 159 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; 160 } 161 162 void 163 tt_remove_view(view_t *v) 164 { 165 dmode_t *mode = v->mode; 166 167 if (mode->current_view == v) { 168 #if 0 169 if (v->flags & VF_DISPLAY) 170 panic("Cannot shutdown display"); /* XXX */ 171 #endif 172 mode->current_view = NULL; 173 } 174 v->flags &= ~VF_DISPLAY; 175 } 176 177 void 178 tt_save_view(view_t *v) 179 { 180 } 181 182 void 183 tt_free_view(view_t *v) 184 { 185 186 if (v) { 187 tt_remove_view(v); 188 if (v->colormap != &gra_con_cmap) 189 free(v->colormap, M_DEVBUF); 190 free_bitmap(v->bitmap); 191 if (v != &gra_con_view) 192 free(v, M_DEVBUF); 193 } 194 } 195 196 static int 197 tt_use_colormap(view_t *v, colormap_t *cm) 198 { 199 dmode_t *dm; 200 volatile u_short *creg; 201 u_long *src; 202 colormap_t *vcm; 203 u_long *vcreg; 204 u_short ncreg; 205 int i; 206 207 dm = v->mode; 208 vcm = v->colormap; 209 210 /* 211 * I guess it seems reasonable to require the maps to be 212 * of the same type... 213 */ 214 if (cm->type != vcm->type) 215 return(EINVAL); 216 217 /* 218 * First figure out where the actual colormap resides and 219 * howmany colors are in it. 220 */ 221 switch (vm_reg(dm)) { 222 case RES_STLOW: 223 creg = &VIDEO->vd_tt_rgb[0]; 224 ncreg = 16; 225 break; 226 case RES_STMID: 227 creg = &VIDEO->vd_tt_rgb[0]; 228 ncreg = 4; 229 break; 230 case RES_STHIGH: 231 creg = &VIDEO->vd_tt_rgb[254]; 232 ncreg = 2; 233 break; 234 case RES_TTLOW: 235 creg = &VIDEO->vd_tt_rgb[0]; 236 ncreg = 256; 237 break; 238 case RES_TTMID: 239 creg = &VIDEO->vd_tt_rgb[0]; 240 ncreg = 16; 241 break; 242 case RES_TTHIGH: 243 return(0); /* No colors */ 244 default: 245 panic("grf_tt:use_colormap: wrong mode!?"); 246 } 247 248 /* If first entry specified beyond capabilities -> error */ 249 if (cm->first >= ncreg) 250 return(EINVAL); 251 252 /* 253 * A little tricky, the actual colormap pointer will be NULL 254 * when view is not displaying, valid otherwise. 255 */ 256 if (v->flags & VF_DISPLAY) 257 creg = &creg[cm->first]; 258 else 259 creg = NULL; 260 261 vcreg = &vcm->entry[cm->first]; 262 ncreg -= cm->first; 263 if (cm->size > ncreg) 264 return(EINVAL); 265 ncreg = cm->size; 266 267 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { 268 *vcreg = *src++; 269 270 /* 271 * If displaying, also update actual color registers. 272 */ 273 if (creg != NULL) 274 *creg++ = CM_L2TT(*vcreg); 275 } 276 return (0); 277 } 278 279 static view_t * 280 tt_alloc_view(dmode_t *mode, dimen_t *dim, u_char depth) 281 { 282 view_t *v; 283 bmap_t *bm; 284 285 if (!atari_realconfig) 286 v = &gra_con_view; 287 else 288 v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); 289 if (v == NULL) 290 return (NULL); 291 292 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); 293 if (bm) { 294 box_t box; 295 296 v->colormap = alloc_colormap(mode); 297 if (v->colormap) { 298 INIT_BOX(&box,0,0,mode->size.width,mode->size.height); 299 init_view(v, bm, mode, &box); 300 return (v); 301 } 302 free_bitmap(bm); 303 } 304 if (v != &gra_con_view) 305 free(v, M_DEVBUF); 306 return (NULL); 307 } 308 309 static void 310 init_view(view_t *v, bmap_t *bm, dmode_t *mode, box_t *dbox) 311 { 312 v->bitmap = bm; 313 v->mode = mode; 314 v->flags = 0; 315 memcpy(&v->display, dbox, sizeof(box_t)); 316 } 317 318 /* bitmap functions */ 319 320 static bmap_t * 321 alloc_bitmap(u_long width, u_long height, u_char depth) 322 { 323 u_long total_size, bm_size; 324 void *hw_address; 325 bmap_t *bm; 326 327 /* 328 * Sigh, it seems for mapping to work we need the bitplane data to 329 * 1: be aligned on a page boundary. 330 * 2: be n pages large. 331 * 332 * why? because the user gets a page aligned address, if this is before 333 * your allocation, too bad. Also it seems that the mapping routines 334 * do not watch to closely to the allowable length. so if you go over 335 * n pages by less than another page, the user gets to write all over 336 * the entire page. Since you did not allocate up to a page boundary 337 * (or more) the user writes into someone elses memory. -ch 338 */ 339 bm_size = m68k_round_page((width * height * depth) / NBBY); 340 total_size = bm_size + sizeof(bmap_t) + PAGE_SIZE; 341 342 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) 343 return(NULL); 344 345 bm->plane = (u_char*)bm + sizeof(bmap_t); 346 bm->plane = (u_char*)m68k_round_page(bm->plane); 347 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); 348 bm->hw_address = (u_char*)m68k_round_page(bm->hw_address); 349 bm->bytes_per_row = (width * depth) / NBBY; 350 bm->rows = height; 351 bm->depth = depth; 352 bm->regs = NULL; 353 bm->hw_regs = NULL; 354 bm->reg_size = 0; 355 bm->phys_mappable = (depth * width * height) / NBBY; 356 bm->lin_base = 0; 357 bm->vga_address = NULL; 358 bm->vga_mappable = 0; 359 bm->vga_base = 0; 360 361 memset(bm->plane, 0, bm_size); 362 return (bm); 363 } 364 365 static void 366 free_bitmap(bmap_t *bm) 367 { 368 if (bm) 369 free_stmem(bm); 370 } 371 372 static colormap_t * 373 alloc_colormap(dmode_t *dm) 374 { 375 int nentries, i; 376 colormap_t *cm; 377 u_char type = CM_COLOR; 378 379 switch (vm_reg(dm)) { 380 case RES_STLOW: 381 case RES_TTMID: 382 nentries = 16; 383 break; 384 case RES_STMID: 385 nentries = 4; 386 break; 387 case RES_STHIGH: 388 nentries = 2; 389 break; 390 case RES_TTLOW: 391 nentries = 256; 392 break; 393 case RES_TTHIGH: 394 type = CM_MONO; 395 nentries = 0; 396 break; 397 default: 398 panic("grf_tt:alloc_colormap: wrong mode!?"); 399 } 400 if (!atari_realconfig) { 401 cm = &gra_con_cmap; 402 cm->entry = gra_con_colors; 403 } else { 404 int size; 405 406 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); 407 cm = malloc(size, M_DEVBUF, M_NOWAIT); 408 if (cm == NULL) 409 return (NULL); 410 cm->entry = (long *)&cm[1]; 411 412 } 413 if ((cm->type = type) == CM_COLOR) 414 cm->red_mask = cm->green_mask = cm->blue_mask = 0xf; 415 cm->first = 0; 416 cm->size = nentries; 417 418 for (i = 0; i < nentries; i++) 419 cm->entry[i] = gra_def_color16[i % 16]; 420 return (cm); 421 } 422 #endif /* TT_VIDEO */ 423
Indexes created Thu Sep 25 08:09:54 GMT 2025