bt485.c revision 1.8
1 /* $NetBSD: bt485.c,v 1.8 2001/12/12 07:47:46 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 /* This code was derived from and originally located in sys/dev/pci/ 31 * NetBSD: tga_bt485.c,v 1.4 1999/03/24 05:51:21 mrg Exp 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: bt485.c,v 1.8 2001/12/12 07:47:46 elric Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/buf.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/pci/pcivar.h> 47 #include <dev/ic/bt485reg.h> 48 #include <dev/ic/bt485var.h> 49 #include <dev/ic/ramdac.h> 50 51 #include <dev/wscons/wsconsio.h> 52 53 /* 54 * Functions exported via the RAMDAC configuration table. 55 */ 56 void bt485_init __P((struct ramdac_cookie *)); 57 int bt485_set_cmap __P((struct ramdac_cookie *, 58 struct wsdisplay_cmap *)); 59 int bt485_get_cmap __P((struct ramdac_cookie *, 60 struct wsdisplay_cmap *)); 61 int bt485_set_cursor __P((struct ramdac_cookie *, 62 struct wsdisplay_cursor *)); 63 int bt485_get_cursor __P((struct ramdac_cookie *, 64 struct wsdisplay_cursor *)); 65 int bt485_set_curpos __P((struct ramdac_cookie *, 66 struct wsdisplay_curpos *)); 67 int bt485_get_curpos __P((struct ramdac_cookie *, 68 struct wsdisplay_curpos *)); 69 int bt485_get_curmax __P((struct ramdac_cookie *, 70 struct wsdisplay_curpos *)); 71 72 /* XXX const */ 73 struct ramdac_funcs bt485_funcsstruct = { 74 "Bt485", 75 bt485_register, 76 bt485_init, 77 bt485_set_cmap, 78 bt485_get_cmap, 79 bt485_set_cursor, 80 bt485_get_cursor, 81 bt485_set_curpos, 82 bt485_get_curpos, 83 bt485_get_curmax, 84 NULL, /* check_curcmap; not needed */ 85 NULL, /* set_curcmap; not needed */ 86 NULL, /* get_curcmap; not needed */ 87 NULL, /* no dot clock to set */ 88 }; 89 90 /* 91 * Private data. 92 */ 93 struct bt485data { 94 void *cookie; /* This is what is passed 95 * around, and is probably 96 * struct tga_devconfig * 97 */ 98 99 int (*ramdac_sched_update) __P((void *, void (*)(void *))); 100 void (*ramdac_wr) __P((void *, u_int, u_int8_t)); 101 u_int8_t (*ramdac_rd) __P((void *, u_int)); 102 103 int changed; /* what changed; see below */ 104 int curenb; /* cursor enabled */ 105 struct wsdisplay_curpos curpos; /* current cursor position */ 106 struct wsdisplay_curpos curhot; /* cursor hotspot */ 107 char curcmap_r[2]; /* cursor colormap */ 108 char curcmap_g[2]; 109 char curcmap_b[2]; 110 struct wsdisplay_curpos cursize; /* current cursor size */ 111 char curimage[512]; /* cursor image data */ 112 char curmask[512]; /* cursor mask data */ 113 char cmap_r[256]; /* colormap */ 114 char cmap_g[256]; 115 char cmap_b[256]; 116 }; 117 118 #define DATA_ENB_CHANGED 0x01 /* cursor enable changed */ 119 #define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */ 120 #define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */ 121 #define DATA_CMAP_CHANGED 0x08 /* colormap changed */ 122 #define DATA_ALL_CHANGED 0x0f 123 124 #define CURSOR_MAX_SIZE 64 125 126 /* 127 * Internal functions. 128 */ 129 inline void bt485_wr_i __P((struct bt485data *, u_int8_t, u_int8_t)); 130 inline u_int8_t bt485_rd_i __P((struct bt485data *, u_int8_t)); 131 void bt485_update __P((void *)); 132 void bt485_update_curpos __P((struct bt485data *)); 133 134 /*****************************************************************************/ 135 136 /* 137 * Functions exported via the RAMDAC configuration table. 138 */ 139 140 struct ramdac_funcs * 141 bt485_funcs(void) 142 { 143 return &bt485_funcsstruct; 144 } 145 146 struct ramdac_cookie * 147 bt485_register(v, sched_update, wr, rd) 148 void *v; 149 int (*sched_update)(void *, void (*)(void *)); 150 void (*wr)(void *, u_int, u_int8_t); 151 u_int8_t (*rd)(void *, u_int); 152 { 153 struct bt485data *data; 154 /* 155 * XXX -- comment out of date. rcd. 156 * If we should allocate a new private info struct, do so. 157 * Otherwise, use the one we have (if it's there), or 158 * use the temporary one on the stack. 159 */ 160 data = malloc(sizeof *data, M_DEVBUF, M_WAITOK); 161 /* XXX -- if !data */ 162 data->cookie = v; 163 data->ramdac_sched_update = sched_update; 164 data->ramdac_wr = wr; 165 data->ramdac_rd = rd; 166 return (struct ramdac_cookie *)data; 167 } 168 169 /* 170 * This function exists solely to provide a means to init 171 * the RAMDAC without first registering. It is useful for 172 * initializing the console early on. 173 */ 174 void 175 bt485_cninit(v, sched_update, wr, rd) 176 void *v; 177 int (*sched_update)(void *, void (*)(void *)); 178 void (*wr)(void *, u_int, u_int8_t); 179 u_int8_t (*rd)(void *, u_int); 180 { 181 struct bt485data tmp, *data = &tmp; 182 data->cookie = v; 183 data->ramdac_sched_update = sched_update; 184 data->ramdac_wr = wr; 185 data->ramdac_rd = rd; 186 bt485_init((struct ramdac_cookie *)data); 187 } 188 189 void 190 bt485_init(rc) 191 struct ramdac_cookie *rc; 192 { 193 u_int8_t regval; 194 struct bt485data *data = (struct bt485data *)rc; 195 int i; 196 197 /* 198 * Init the BT485 for normal operation. 199 */ 200 201 /* 202 * Allow indirect register access. (Actually, this is 203 * already enabled. In fact, if it is _disabled_, for 204 * some reason the monitor appears to lose sync!!! (?!?!) 205 */ 206 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0); 207 regval |= 0x80; 208 /* 209 * Set the RAMDAC to 8 bit resolution, rather than 6 bit 210 * resolution. 211 */ 212 regval |= 0x02; 213 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval); 214 215 /* Set the RAMDAC to 8BPP (no interestion options). */ 216 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40); 217 218 /* Disable the cursor (for now) */ 219 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 220 regval &= ~0x03; 221 regval |= 0x24; 222 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 223 224 /* Use a 64x64x2 cursor */ 225 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 226 regval |= 0x04; 227 regval |= 0x08; 228 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 229 230 /* Set the Pixel Mask to something useful */ 231 data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff); 232 233 /* 234 * Initialize the RAMDAC info struct to hold all of our 235 * data, and fill it in. 236 */ 237 data->changed = DATA_ALL_CHANGED; 238 239 data->curenb = 0; /* cursor disabled */ 240 data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */ 241 data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */ 242 243 /* initial cursor colormap: 0 is black, 1 is white */ 244 data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0; 245 data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff; 246 247 /* initial cursor data: 64x64 block of white. */ 248 data->cursize.x = data->cursize.y = 64; 249 for (i = 0; i < 512; i++) 250 data->curimage[i] = data->curmask[i] = 0xff; 251 252 /* Initial colormap: 0 is black, everything else is white */ 253 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0; 254 for (i = 1; i < 256; i++) 255 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255; 256 257 bt485_update((void *)data); 258 } 259 260 int 261 bt485_set_cmap(rc, cmapp) 262 struct ramdac_cookie *rc; 263 struct wsdisplay_cmap *cmapp; 264 { 265 struct bt485data *data = (struct bt485data *)rc; 266 u_int count, index; 267 int s; 268 269 if (cmapp->index >= 256 || (cmapp->index + cmapp->count) > 256) 270 return (EINVAL); 271 if (!uvm_useracc(cmapp->red, cmapp->count, B_READ) || 272 !uvm_useracc(cmapp->green, cmapp->count, B_READ) || 273 !uvm_useracc(cmapp->blue, cmapp->count, B_READ)) 274 return (EFAULT); 275 276 s = spltty(); 277 278 index = cmapp->index; 279 count = cmapp->count; 280 copyin(cmapp->red, &data->cmap_r[index], count); 281 copyin(cmapp->green, &data->cmap_g[index], count); 282 copyin(cmapp->blue, &data->cmap_b[index], count); 283 284 data->changed |= DATA_CMAP_CHANGED; 285 286 data->ramdac_sched_update(data->cookie, bt485_update); 287 splx(s); 288 289 return (0); 290 } 291 292 int 293 bt485_get_cmap(rc, cmapp) 294 struct ramdac_cookie *rc; 295 struct wsdisplay_cmap *cmapp; 296 { 297 struct bt485data *data = (struct bt485data *)rc; 298 int error, count, index; 299 300 if ((u_int)cmapp->index >= 256 || 301 ((u_int)cmapp->index + (u_int)cmapp->count) > 256) 302 return (EINVAL); 303 304 count = cmapp->count; 305 index = cmapp->index; 306 307 error = copyout(&data->cmap_r[index], cmapp->red, count); 308 if (error) 309 return (error); 310 error = copyout(&data->cmap_g[index], cmapp->green, count); 311 if (error) 312 return (error); 313 error = copyout(&data->cmap_b[index], cmapp->blue, count); 314 return (error); 315 } 316 317 int 318 bt485_set_cursor(rc, cursorp) 319 struct ramdac_cookie *rc; 320 struct wsdisplay_cursor *cursorp; 321 { 322 struct bt485data *data = (struct bt485data *)rc; 323 u_int count, index, v; 324 int s; 325 326 v = cursorp->which; 327 328 /* 329 * For DOCMAP and DOSHAPE, verify that parameters are OK 330 * before we do anything that we can't recover from. 331 */ 332 if (v & WSDISPLAY_CURSOR_DOCMAP) { 333 if (cursorp->cmap.index > 2 || 334 (cursorp->cmap.index + cursorp->cmap.count) > 2) 335 return (EINVAL); 336 count = cursorp->cmap.count; 337 if (!uvm_useracc(cursorp->cmap.red, count, B_READ) || 338 !uvm_useracc(cursorp->cmap.green, count, B_READ) || 339 !uvm_useracc(cursorp->cmap.blue, count, B_READ)) 340 return (EFAULT); 341 } 342 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 343 if (cursorp->size.x > CURSOR_MAX_SIZE || 344 cursorp->size.y > CURSOR_MAX_SIZE) 345 return (EINVAL); 346 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 347 if (!uvm_useracc(cursorp->image, count, B_READ) || 348 !uvm_useracc(cursorp->mask, count, B_READ)) 349 return (EFAULT); 350 } 351 352 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) { 353 if (v & WSDISPLAY_CURSOR_DOPOS) 354 data->curpos = cursorp->pos; 355 if (v & WSDISPLAY_CURSOR_DOCUR) 356 data->curhot = cursorp->hot; 357 bt485_update_curpos(data); 358 } 359 360 s = spltty(); 361 362 /* Parameters are OK; perform the requested operations. */ 363 if (v & WSDISPLAY_CURSOR_DOCUR) { 364 data->curenb = cursorp->enable; 365 data->changed |= DATA_ENB_CHANGED; 366 } 367 if (v & WSDISPLAY_CURSOR_DOCMAP) { 368 count = cursorp->cmap.count; 369 index = cursorp->cmap.index; 370 copyin(cursorp->cmap.red, &data->curcmap_r[index], count); 371 copyin(cursorp->cmap.green, &data->curcmap_g[index], count); 372 copyin(cursorp->cmap.blue, &data->curcmap_b[index], count); 373 data->changed |= DATA_CURCMAP_CHANGED; 374 } 375 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 376 data->cursize = cursorp->size; 377 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 378 memset(data->curimage, 0, sizeof data->curimage); 379 memset(data->curmask, 0, sizeof data->curmask); 380 copyin(cursorp->image, data->curimage, count); /* can't fail */ 381 copyin(cursorp->mask, data->curmask, count); /* can't fail */ 382 data->changed |= DATA_CURSHAPE_CHANGED; 383 } 384 385 if (data->changed) 386 data->ramdac_sched_update(data->cookie, bt485_update); 387 splx(s); 388 389 return (0); 390 } 391 392 int 393 bt485_get_cursor(rc, cursorp) 394 struct ramdac_cookie *rc; 395 struct wsdisplay_cursor *cursorp; 396 { 397 struct bt485data *data = (struct bt485data *)rc; 398 int error, count; 399 400 /* we return everything they want */ 401 cursorp->which = WSDISPLAY_CURSOR_DOALL; 402 403 cursorp->enable = data->curenb; /* DOCUR */ 404 cursorp->pos = data->curpos; /* DOPOS */ 405 cursorp->hot = data->curhot; /* DOHOT */ 406 407 cursorp->cmap.index = 0; /* DOCMAP */ 408 cursorp->cmap.count = 2; 409 if (cursorp->cmap.red != NULL) { 410 error = copyout(data->curcmap_r, cursorp->cmap.red, 2); 411 if (error) 412 return (error); 413 } 414 if (cursorp->cmap.green != NULL) { 415 error = copyout(data->curcmap_g, cursorp->cmap.green, 2); 416 if (error) 417 return (error); 418 } 419 if (cursorp->cmap.blue != NULL) { 420 error = copyout(data->curcmap_b, cursorp->cmap.blue, 2); 421 if (error) 422 return (error); 423 } 424 425 cursorp->size = data->cursize; /* DOSHAPE */ 426 if (cursorp->image != NULL) { 427 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 428 error = copyout(data->curimage, cursorp->image, count); 429 if (error) 430 return (error); 431 error = copyout(data->curmask, cursorp->mask, count); 432 if (error) 433 return (error); 434 } 435 436 return (0); 437 } 438 439 int 440 bt485_set_curpos(rc, curposp) 441 struct ramdac_cookie *rc; 442 struct wsdisplay_curpos *curposp; 443 { 444 struct bt485data *data = (struct bt485data *)rc; 445 446 data->curpos = *curposp; 447 bt485_update_curpos(data); 448 449 return (0); 450 } 451 452 int 453 bt485_get_curpos(rc, curposp) 454 struct ramdac_cookie *rc; 455 struct wsdisplay_curpos *curposp; 456 { 457 struct bt485data *data = (struct bt485data *)rc; 458 459 *curposp = data->curpos; 460 return (0); 461 } 462 463 int 464 bt485_get_curmax(rc, curposp) 465 struct ramdac_cookie *rc; 466 struct wsdisplay_curpos *curposp; 467 { 468 469 curposp->x = curposp->y = CURSOR_MAX_SIZE; 470 return (0); 471 } 472 473 /*****************************************************************************/ 474 475 /* 476 * Internal functions. 477 */ 478 479 inline void 480 bt485_wr_i(data, ireg, val) 481 struct bt485data *data; 482 u_int8_t ireg; 483 u_int8_t val; 484 { 485 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 486 data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val); 487 } 488 489 inline u_int8_t 490 bt485_rd_i(data, ireg) 491 struct bt485data *data; 492 u_int8_t ireg; 493 { 494 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 495 return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED)); 496 } 497 498 void 499 bt485_update(vp) 500 void *vp; 501 { 502 struct bt485data *data = vp; 503 u_int8_t regval; 504 int count, i, v; 505 506 v = data->changed; 507 data->changed = 0; 508 509 if (v & DATA_ENB_CHANGED) { 510 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 511 if (data->curenb) 512 regval |= 0x01; 513 else 514 regval &= ~0x03; 515 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 516 } 517 518 if (v & DATA_CURCMAP_CHANGED) { 519 /* addr[9:0] assumed to be 0 */ 520 /* set addr[7:0] to 1 */ 521 data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01); 522 523 /* spit out the cursor data */ 524 for (i = 0; i < 2; i++) { 525 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 526 data->curcmap_r[i]); 527 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 528 data->curcmap_g[i]); 529 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 530 data->curcmap_b[i]); 531 } 532 } 533 534 if (v & DATA_CURSHAPE_CHANGED) { 535 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 536 537 /* 538 * Write the cursor image data: 539 * set addr[9:8] to 0, 540 * set addr[7:0] to 0, 541 * spit it all out. 542 */ 543 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 544 regval &= ~0x03; 545 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 546 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 547 for (i = 0; i < count; i++) 548 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 549 data->curimage[i]); 550 551 /* 552 * Write the cursor mask data: 553 * set addr[9:8] to 2, 554 * set addr[7:0] to 0, 555 * spit it all out. 556 */ 557 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 558 regval &= ~0x03; regval |= 0x02; 559 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 560 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 561 for (i = 0; i < count; i++) 562 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 563 data->curmask[i]); 564 565 /* set addr[9:0] back to 0 */ 566 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 567 regval &= ~0x03; 568 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 569 } 570 571 if (v & DATA_CMAP_CHANGED) { 572 /* addr[9:0] assumed to be 0 */ 573 /* set addr[7:0] to 0 */ 574 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00); 575 576 /* spit out the cursor data */ 577 for (i = 0; i < 256; i++) { 578 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 579 data->cmap_r[i]); 580 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 581 data->cmap_g[i]); 582 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 583 data->cmap_b[i]); 584 } 585 } 586 } 587 588 void 589 bt485_update_curpos(data) 590 struct bt485data *data; 591 { 592 void *cookie = data->cookie; 593 int s, x, y; 594 595 s = spltty(); 596 597 x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x; 598 y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y; 599 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff); 600 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f); 601 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff); 602 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f); 603 604 splx(s); 605 } 606
Indexes created Tue Sep 23 07:09:52 GMT 2025