bt485.c revision 1.16
1 /* $NetBSD: bt485.c,v 1.16 2012/02/12 16:34:11 matt 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 1.16 2012/02/12 16:34:11 matt 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 <dev/pci/pcivar.h> 45 #include <dev/ic/bt485reg.h> 46 #include <dev/ic/bt485var.h> 47 #include <dev/ic/ramdac.h> 48 49 #include <dev/wscons/wsconsio.h> 50 51 /* 52 * Functions exported via the RAMDAC configuration table. 53 */ 54 void bt485_init(struct ramdac_cookie *); 55 int bt485_set_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 56 int bt485_get_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 57 int bt485_set_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 58 int bt485_get_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 59 int bt485_set_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 60 int bt485_get_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 61 int bt485_get_curmax(struct ramdac_cookie *, struct wsdisplay_curpos *); 62 63 /* XXX const */ 64 struct ramdac_funcs bt485_funcsstruct = { 65 "Bt485", 66 bt485_register, 67 bt485_init, 68 bt485_set_cmap, 69 bt485_get_cmap, 70 bt485_set_cursor, 71 bt485_get_cursor, 72 bt485_set_curpos, 73 bt485_get_curpos, 74 bt485_get_curmax, 75 NULL, /* check_curcmap; not needed */ 76 NULL, /* set_curcmap; not needed */ 77 NULL, /* get_curcmap; not needed */ 78 NULL, /* no dot clock to set */ 79 }; 80 81 /* 82 * Private data. 83 */ 84 struct bt485data { 85 void *cookie; /* This is what is passed 86 * around, and is probably 87 * struct tga_devconfig * 88 */ 89 90 int (*ramdac_sched_update)(void *, void (*)(void *)); 91 void (*ramdac_wr)(void *, u_int, u_int8_t); 92 u_int8_t (*ramdac_rd)(void *, u_int); 93 94 int changed; /* what changed; see below */ 95 int curenb; /* cursor enabled */ 96 struct wsdisplay_curpos curpos; /* current cursor position */ 97 struct wsdisplay_curpos curhot; /* cursor hotspot */ 98 char curcmap_r[2]; /* cursor colormap */ 99 char curcmap_g[2]; 100 char curcmap_b[2]; 101 struct wsdisplay_curpos cursize; /* current cursor size */ 102 char curimage[512]; /* cursor image data */ 103 char curmask[512]; /* cursor mask data */ 104 char cmap_r[256]; /* colormap */ 105 char cmap_g[256]; 106 char cmap_b[256]; 107 }; 108 109 #define DATA_ENB_CHANGED 0x01 /* cursor enable changed */ 110 #define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */ 111 #define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */ 112 #define DATA_CMAP_CHANGED 0x08 /* colormap changed */ 113 #define DATA_ALL_CHANGED 0x0f 114 115 #define CURSOR_MAX_SIZE 64 116 117 /* 118 * Internal functions. 119 */ 120 inline void bt485_wr_i (struct bt485data *, u_int8_t, u_int8_t); 121 inline u_int8_t bt485_rd_i(struct bt485data *, u_int8_t); 122 void bt485_update(void *); 123 void bt485_update_curpos(struct bt485data *); 124 125 /*****************************************************************************/ 126 127 /* 128 * Functions exported via the RAMDAC configuration table. 129 */ 130 131 struct ramdac_funcs * 132 bt485_funcs(void) 133 { 134 return &bt485_funcsstruct; 135 } 136 137 struct ramdac_cookie * 138 bt485_register( 139 void *v, 140 int (*sched_update)(void *, void (*)(void *)), 141 void (*wr)(void *, u_int, u_int8_t), 142 u_int8_t (*rd)(void *, u_int)) 143 { 144 struct bt485data *data; 145 /* 146 * XXX -- comment out of date. rcd. 147 * If we should allocate a new private info struct, do so. 148 * Otherwise, use the one we have (if it's there), or 149 * use the temporary one on the stack. 150 */ 151 data = malloc(sizeof *data, M_DEVBUF, M_WAITOK); 152 /* XXX -- if !data */ 153 data->cookie = v; 154 data->ramdac_sched_update = sched_update; 155 data->ramdac_wr = wr; 156 data->ramdac_rd = rd; 157 return (struct ramdac_cookie *)data; 158 } 159 160 /* 161 * This function exists solely to provide a means to init 162 * the RAMDAC without first registering. It is useful for 163 * initializing the console early on. 164 */ 165 void 166 bt485_cninit( 167 void *v, 168 int (*sched_update)(void *, void (*)(void *)), 169 void (*wr)(void *, u_int, u_int8_t), 170 u_int8_t (*rd)(void *, u_int)) 171 { 172 struct bt485data tmp, *data = &tmp; 173 data->cookie = v; 174 data->ramdac_sched_update = sched_update; 175 data->ramdac_wr = wr; 176 data->ramdac_rd = rd; 177 bt485_init((struct ramdac_cookie *)data); 178 } 179 180 void 181 bt485_init(struct ramdac_cookie *rc) 182 { 183 u_int8_t regval; 184 struct bt485data *data = (struct bt485data *)rc; 185 int i; 186 187 /* 188 * Init the BT485 for normal operation. 189 */ 190 191 /* 192 * Allow indirect register access. (Actually, this is 193 * already enabled. In fact, if it is _disabled_, for 194 * some reason the monitor appears to lose sync!!! (?!?!) 195 */ 196 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0); 197 regval |= 0x80; 198 /* 199 * Set the RAMDAC to 8 bit resolution, rather than 6 bit 200 * resolution. 201 */ 202 regval |= 0x02; 203 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval); 204 205 /* Set the RAMDAC to 8BPP (no interestion options). */ 206 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40); 207 208 /* Disable the cursor (for now) */ 209 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 210 regval &= ~0x03; 211 regval |= 0x24; 212 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 213 214 /* Use a 64x64x2 cursor */ 215 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 216 regval |= 0x04; 217 regval |= 0x08; 218 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 219 220 /* Set the Pixel Mask to something useful */ 221 data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff); 222 223 /* 224 * Initialize the RAMDAC info struct to hold all of our 225 * data, and fill it in. 226 */ 227 data->changed = DATA_ALL_CHANGED; 228 229 data->curenb = 0; /* cursor disabled */ 230 data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */ 231 data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */ 232 233 /* initial cursor colormap: 0 is black, 1 is white */ 234 data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0; 235 data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff; 236 237 /* initial cursor data: 64x64 block of white. */ 238 data->cursize.x = data->cursize.y = 64; 239 for (i = 0; i < 512; i++) 240 data->curimage[i] = data->curmask[i] = 0xff; 241 242 /* Initial colormap: 0 is black, everything else is white */ 243 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0; 244 for (i = 1; i < 256; i++) 245 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255; 246 247 bt485_update((void *)data); 248 } 249 250 int 251 bt485_set_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 252 { 253 struct bt485data *data = (struct bt485data *)rc; 254 u_int count, index; 255 uint8_t r[256], g[256], b[256]; 256 int s, error; 257 258 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index) 259 return (EINVAL); 260 261 index = cmapp->index; 262 count = cmapp->count; 263 error = copyin(cmapp->red, &r[index], count); 264 if (error) 265 return error; 266 error = copyin(cmapp->green, &g[index], count); 267 if (error) 268 return error; 269 error = copyin(cmapp->blue, &b[index], count); 270 if (error) 271 return error; 272 s = spltty(); 273 memcpy(&data->cmap_r[index], &r[index], count); 274 memcpy(&data->cmap_g[index], &g[index], count); 275 memcpy(&data->cmap_b[index], &b[index], count); 276 data->changed |= DATA_CMAP_CHANGED; 277 data->ramdac_sched_update(data->cookie, bt485_update); 278 splx(s); 279 return (0); 280 } 281 282 int 283 bt485_get_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 284 { 285 struct bt485data *data = (struct bt485data *)rc; 286 u_int count, index; 287 int error; 288 289 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index ) 290 return (EINVAL); 291 292 count = cmapp->count; 293 index = cmapp->index; 294 error = copyout(&data->cmap_r[index], cmapp->red, count); 295 if (error) 296 return (error); 297 error = copyout(&data->cmap_g[index], cmapp->green, count); 298 if (error) 299 return (error); 300 error = copyout(&data->cmap_b[index], cmapp->blue, count); 301 return (error); 302 } 303 304 int 305 bt485_set_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 306 { 307 struct bt485data *data = (struct bt485data *)rc; 308 u_int count = 0, icount = 0, index = 0, v; 309 char r[2], g[2], b[2], image[512], mask[512]; 310 int s, error; 311 312 v = cursorp->which; 313 314 /* 315 * For DOCMAP and DOSHAPE, copy in the new data 316 * before we do anything that we can't recover from. 317 */ 318 if (v & WSDISPLAY_CURSOR_DOCMAP) { 319 if (cursorp->cmap.index > 2 || 320 (cursorp->cmap.index + cursorp->cmap.count) > 2) 321 return (EINVAL); 322 count = cursorp->cmap.count; 323 index = cursorp->cmap.index; 324 error = copyin(cursorp->cmap.red, &r[index], count); 325 if (error) 326 return error; 327 error = copyin(cursorp->cmap.green, &g[index], count); 328 if (error) 329 return error; 330 error = copyin(cursorp->cmap.blue, &b[index], count); 331 if (error) 332 return error; 333 } 334 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 335 if (cursorp->size.x > CURSOR_MAX_SIZE || 336 cursorp->size.y > CURSOR_MAX_SIZE) 337 return (EINVAL); 338 icount = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 339 error = copyin(cursorp->image, image, icount); 340 if (error) 341 return error; 342 error = copyin(cursorp->mask, mask, icount); 343 if (error) 344 return error; 345 } 346 347 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) { 348 if (v & WSDISPLAY_CURSOR_DOPOS) 349 data->curpos = cursorp->pos; 350 if (v & WSDISPLAY_CURSOR_DOCUR) 351 data->curhot = cursorp->hot; 352 bt485_update_curpos(data); 353 } 354 355 s = spltty(); 356 357 /* Data is all available; perform the requested operations. */ 358 if (v & WSDISPLAY_CURSOR_DOCUR) { 359 data->curenb = cursorp->enable; 360 data->changed |= DATA_ENB_CHANGED; 361 } 362 if (v & WSDISPLAY_CURSOR_DOCMAP) { 363 memcpy(&data->curcmap_r[index], &r[index], count); 364 memcpy(&data->curcmap_g[index], &g[index], count); 365 memcpy(&data->curcmap_b[index], &b[index], count); 366 data->changed |= DATA_CURCMAP_CHANGED; 367 } 368 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 369 data->cursize = cursorp->size; 370 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 371 memset(data->curimage, 0, sizeof data->curimage); 372 memset(data->curmask, 0, sizeof data->curmask); 373 memcpy(data->curimage, image, icount); 374 memcpy(data->curmask, mask, icount); 375 data->changed |= DATA_CURSHAPE_CHANGED; 376 } 377 378 if (data->changed) 379 data->ramdac_sched_update(data->cookie, bt485_update); 380 splx(s); 381 382 return (0); 383 } 384 385 int 386 bt485_get_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 387 { 388 struct bt485data *data = (struct bt485data *)rc; 389 int error, count; 390 391 /* we return everything they want */ 392 cursorp->which = WSDISPLAY_CURSOR_DOALL; 393 394 cursorp->enable = data->curenb; /* DOCUR */ 395 cursorp->pos = data->curpos; /* DOPOS */ 396 cursorp->hot = data->curhot; /* DOHOT */ 397 398 cursorp->cmap.index = 0; /* DOCMAP */ 399 cursorp->cmap.count = 2; 400 if (cursorp->cmap.red != NULL) { 401 error = copyout(data->curcmap_r, cursorp->cmap.red, 2); 402 if (error) 403 return (error); 404 } 405 if (cursorp->cmap.green != NULL) { 406 error = copyout(data->curcmap_g, cursorp->cmap.green, 2); 407 if (error) 408 return (error); 409 } 410 if (cursorp->cmap.blue != NULL) { 411 error = copyout(data->curcmap_b, cursorp->cmap.blue, 2); 412 if (error) 413 return (error); 414 } 415 416 cursorp->size = data->cursize; /* DOSHAPE */ 417 if (cursorp->image != NULL) { 418 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 419 error = copyout(data->curimage, cursorp->image, count); 420 if (error) 421 return (error); 422 error = copyout(data->curmask, cursorp->mask, count); 423 if (error) 424 return (error); 425 } 426 427 return (0); 428 } 429 430 int 431 bt485_set_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 432 { 433 struct bt485data *data = (struct bt485data *)rc; 434 435 data->curpos = *curposp; 436 bt485_update_curpos(data); 437 438 return (0); 439 } 440 441 int 442 bt485_get_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 443 { 444 struct bt485data *data = (struct bt485data *)rc; 445 446 *curposp = data->curpos; 447 return (0); 448 } 449 450 int 451 bt485_get_curmax(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 452 { 453 454 curposp->x = curposp->y = CURSOR_MAX_SIZE; 455 return (0); 456 } 457 458 /*****************************************************************************/ 459 460 /* 461 * Internal functions. 462 */ 463 464 inline void 465 bt485_wr_i(struct bt485data *data, u_int8_t ireg, u_int8_t val) 466 { 467 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 468 data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val); 469 } 470 471 inline u_int8_t 472 bt485_rd_i(struct bt485data *data, u_int8_t ireg) 473 { 474 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 475 return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED)); 476 } 477 478 void 479 bt485_update(void *vp) 480 { 481 struct bt485data *data = vp; 482 u_int8_t regval; 483 int count, i, v; 484 485 v = data->changed; 486 data->changed = 0; 487 488 if (v & DATA_ENB_CHANGED) { 489 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 490 if (data->curenb) 491 regval |= 0x01; 492 else 493 regval &= ~0x03; 494 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 495 } 496 497 if (v & DATA_CURCMAP_CHANGED) { 498 /* addr[9:0] assumed to be 0 */ 499 /* set addr[7:0] to 1 */ 500 data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01); 501 502 /* spit out the cursor data */ 503 for (i = 0; i < 2; i++) { 504 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 505 data->curcmap_r[i]); 506 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 507 data->curcmap_g[i]); 508 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 509 data->curcmap_b[i]); 510 } 511 } 512 513 if (v & DATA_CURSHAPE_CHANGED) { 514 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 515 516 /* 517 * Write the cursor image data: 518 * set addr[9:8] to 0, 519 * set addr[7:0] to 0, 520 * spit it all out. 521 */ 522 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 523 regval &= ~0x03; 524 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 525 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 526 for (i = 0; i < count; i++) 527 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 528 data->curimage[i]); 529 530 /* 531 * Write the cursor mask data: 532 * set addr[9:8] to 2, 533 * set addr[7:0] to 0, 534 * spit it all out. 535 */ 536 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 537 regval &= ~0x03; regval |= 0x02; 538 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 539 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 540 for (i = 0; i < count; i++) 541 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 542 data->curmask[i]); 543 544 /* set addr[9:0] back to 0 */ 545 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 546 regval &= ~0x03; 547 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 548 } 549 550 if (v & DATA_CMAP_CHANGED) { 551 /* addr[9:0] assumed to be 0 */ 552 /* set addr[7:0] to 0 */ 553 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00); 554 555 /* spit out the cursor data */ 556 for (i = 0; i < 256; i++) { 557 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 558 data->cmap_r[i]); 559 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 560 data->cmap_g[i]); 561 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 562 data->cmap_b[i]); 563 } 564 } 565 } 566 567 void 568 bt485_update_curpos(struct bt485data *data) 569 { 570 void *cookie = data->cookie; 571 int s, x, y; 572 573 s = spltty(); 574 575 x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x; 576 y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y; 577 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff); 578 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f); 579 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff); 580 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f); 581 582 splx(s); 583 } 584
Indexes created Wed Sep 24 05:09:52 GMT 2025