bt485.c revision 1.14
1 /* $NetBSD: bt485.c,v 1.14 2009/03/14 15:36:17 dsl 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 1.14 2009/03/14 15:36:17 dsl 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(struct ramdac_cookie *); 57 int bt485_set_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 58 int bt485_get_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *); 59 int bt485_set_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 60 int bt485_get_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *); 61 int bt485_set_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 62 int bt485_get_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *); 63 int bt485_get_curmax(struct ramdac_cookie *, struct wsdisplay_curpos *); 64 65 /* XXX const */ 66 struct ramdac_funcs bt485_funcsstruct = { 67 "Bt485", 68 bt485_register, 69 bt485_init, 70 bt485_set_cmap, 71 bt485_get_cmap, 72 bt485_set_cursor, 73 bt485_get_cursor, 74 bt485_set_curpos, 75 bt485_get_curpos, 76 bt485_get_curmax, 77 NULL, /* check_curcmap; not needed */ 78 NULL, /* set_curcmap; not needed */ 79 NULL, /* get_curcmap; not needed */ 80 NULL, /* no dot clock to set */ 81 }; 82 83 /* 84 * Private data. 85 */ 86 struct bt485data { 87 void *cookie; /* This is what is passed 88 * around, and is probably 89 * struct tga_devconfig * 90 */ 91 92 int (*ramdac_sched_update)(void *, void (*)(void *)); 93 void (*ramdac_wr)(void *, u_int, u_int8_t); 94 u_int8_t (*ramdac_rd)(void *, u_int); 95 96 int changed; /* what changed; see below */ 97 int curenb; /* cursor enabled */ 98 struct wsdisplay_curpos curpos; /* current cursor position */ 99 struct wsdisplay_curpos curhot; /* cursor hotspot */ 100 char curcmap_r[2]; /* cursor colormap */ 101 char curcmap_g[2]; 102 char curcmap_b[2]; 103 struct wsdisplay_curpos cursize; /* current cursor size */ 104 char curimage[512]; /* cursor image data */ 105 char curmask[512]; /* cursor mask data */ 106 char cmap_r[256]; /* colormap */ 107 char cmap_g[256]; 108 char cmap_b[256]; 109 }; 110 111 #define DATA_ENB_CHANGED 0x01 /* cursor enable changed */ 112 #define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */ 113 #define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */ 114 #define DATA_CMAP_CHANGED 0x08 /* colormap changed */ 115 #define DATA_ALL_CHANGED 0x0f 116 117 #define CURSOR_MAX_SIZE 64 118 119 /* 120 * Internal functions. 121 */ 122 inline void bt485_wr_i (struct bt485data *, u_int8_t, u_int8_t); 123 inline u_int8_t bt485_rd_i(struct bt485data *, u_int8_t); 124 void bt485_update(void *); 125 void bt485_update_curpos(struct bt485data *); 126 127 /*****************************************************************************/ 128 129 /* 130 * Functions exported via the RAMDAC configuration table. 131 */ 132 133 struct ramdac_funcs * 134 bt485_funcs(void) 135 { 136 return &bt485_funcsstruct; 137 } 138 139 struct ramdac_cookie * 140 bt485_register(v, sched_update, wr, rd) 141 void *v; 142 int (*sched_update)(void *, void (*)(void *)); 143 void (*wr)(void *, u_int, u_int8_t); 144 u_int8_t (*rd)(void *, u_int); 145 { 146 struct bt485data *data; 147 /* 148 * XXX -- comment out of date. rcd. 149 * If we should allocate a new private info struct, do so. 150 * Otherwise, use the one we have (if it's there), or 151 * use the temporary one on the stack. 152 */ 153 data = malloc(sizeof *data, M_DEVBUF, M_WAITOK); 154 /* XXX -- if !data */ 155 data->cookie = v; 156 data->ramdac_sched_update = sched_update; 157 data->ramdac_wr = wr; 158 data->ramdac_rd = rd; 159 return (struct ramdac_cookie *)data; 160 } 161 162 /* 163 * This function exists solely to provide a means to init 164 * the RAMDAC without first registering. It is useful for 165 * initializing the console early on. 166 */ 167 void 168 bt485_cninit(v, sched_update, wr, rd) 169 void *v; 170 int (*sched_update)(void *, void (*)(void *)); 171 void (*wr)(void *, u_int, u_int8_t); 172 u_int8_t (*rd)(void *, u_int); 173 { 174 struct bt485data tmp, *data = &tmp; 175 data->cookie = v; 176 data->ramdac_sched_update = sched_update; 177 data->ramdac_wr = wr; 178 data->ramdac_rd = rd; 179 bt485_init((struct ramdac_cookie *)data); 180 } 181 182 void 183 bt485_init(struct ramdac_cookie *rc) 184 { 185 u_int8_t regval; 186 struct bt485data *data = (struct bt485data *)rc; 187 int i; 188 189 /* 190 * Init the BT485 for normal operation. 191 */ 192 193 /* 194 * Allow indirect register access. (Actually, this is 195 * already enabled. In fact, if it is _disabled_, for 196 * some reason the monitor appears to lose sync!!! (?!?!) 197 */ 198 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0); 199 regval |= 0x80; 200 /* 201 * Set the RAMDAC to 8 bit resolution, rather than 6 bit 202 * resolution. 203 */ 204 regval |= 0x02; 205 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval); 206 207 /* Set the RAMDAC to 8BPP (no interestion options). */ 208 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40); 209 210 /* Disable the cursor (for now) */ 211 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 212 regval &= ~0x03; 213 regval |= 0x24; 214 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 215 216 /* Use a 64x64x2 cursor */ 217 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 218 regval |= 0x04; 219 regval |= 0x08; 220 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 221 222 /* Set the Pixel Mask to something useful */ 223 data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff); 224 225 /* 226 * Initialize the RAMDAC info struct to hold all of our 227 * data, and fill it in. 228 */ 229 data->changed = DATA_ALL_CHANGED; 230 231 data->curenb = 0; /* cursor disabled */ 232 data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */ 233 data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */ 234 235 /* initial cursor colormap: 0 is black, 1 is white */ 236 data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0; 237 data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff; 238 239 /* initial cursor data: 64x64 block of white. */ 240 data->cursize.x = data->cursize.y = 64; 241 for (i = 0; i < 512; i++) 242 data->curimage[i] = data->curmask[i] = 0xff; 243 244 /* Initial colormap: 0 is black, everything else is white */ 245 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0; 246 for (i = 1; i < 256; i++) 247 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255; 248 249 bt485_update((void *)data); 250 } 251 252 int 253 bt485_set_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 254 { 255 struct bt485data *data = (struct bt485data *)rc; 256 u_int count, index; 257 uint8_t r[256], g[256], b[256]; 258 int s, error; 259 260 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index) 261 return (EINVAL); 262 263 index = cmapp->index; 264 count = cmapp->count; 265 error = copyin(cmapp->red, &r[index], count); 266 if (error) 267 return error; 268 error = copyin(cmapp->green, &g[index], count); 269 if (error) 270 return error; 271 error = copyin(cmapp->blue, &b[index], count); 272 if (error) 273 return error; 274 s = spltty(); 275 memcpy(&data->cmap_r[index], &r[index], count); 276 memcpy(&data->cmap_g[index], &g[index], count); 277 memcpy(&data->cmap_b[index], &b[index], count); 278 data->changed |= DATA_CMAP_CHANGED; 279 data->ramdac_sched_update(data->cookie, bt485_update); 280 splx(s); 281 return (0); 282 } 283 284 int 285 bt485_get_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 286 { 287 struct bt485data *data = (struct bt485data *)rc; 288 u_int count, index; 289 int error; 290 291 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index ) 292 return (EINVAL); 293 294 count = cmapp->count; 295 index = cmapp->index; 296 error = copyout(&data->cmap_r[index], cmapp->red, count); 297 if (error) 298 return (error); 299 error = copyout(&data->cmap_g[index], cmapp->green, count); 300 if (error) 301 return (error); 302 error = copyout(&data->cmap_b[index], cmapp->blue, count); 303 return (error); 304 } 305 306 int 307 bt485_set_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 308 { 309 struct bt485data *data = (struct bt485data *)rc; 310 u_int count = 0, icount = 0, index = 0, v; 311 char r[2], g[2], b[2], image[512], mask[512]; 312 int s, error; 313 314 v = cursorp->which; 315 316 /* 317 * For DOCMAP and DOSHAPE, copy in the new data 318 * before we do anything that we can't recover from. 319 */ 320 if (v & WSDISPLAY_CURSOR_DOCMAP) { 321 if (cursorp->cmap.index > 2 || 322 (cursorp->cmap.index + cursorp->cmap.count) > 2) 323 return (EINVAL); 324 count = cursorp->cmap.count; 325 index = cursorp->cmap.index; 326 error = copyin(cursorp->cmap.red, &r[index], count); 327 if (error) 328 return error; 329 error = copyin(cursorp->cmap.green, &g[index], count); 330 if (error) 331 return error; 332 error = copyin(cursorp->cmap.blue, &b[index], count); 333 if (error) 334 return error; 335 } 336 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 337 if (cursorp->size.x > CURSOR_MAX_SIZE || 338 cursorp->size.y > CURSOR_MAX_SIZE) 339 return (EINVAL); 340 icount = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 341 error = copyin(cursorp->image, image, icount); 342 if (error) 343 return error; 344 error = copyin(cursorp->mask, mask, icount); 345 if (error) 346 return error; 347 } 348 349 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) { 350 if (v & WSDISPLAY_CURSOR_DOPOS) 351 data->curpos = cursorp->pos; 352 if (v & WSDISPLAY_CURSOR_DOCUR) 353 data->curhot = cursorp->hot; 354 bt485_update_curpos(data); 355 } 356 357 s = spltty(); 358 359 /* Data is all available; perform the requested operations. */ 360 if (v & WSDISPLAY_CURSOR_DOCUR) { 361 data->curenb = cursorp->enable; 362 data->changed |= DATA_ENB_CHANGED; 363 } 364 if (v & WSDISPLAY_CURSOR_DOCMAP) { 365 memcpy(&data->curcmap_r[index], &r[index], count); 366 memcpy(&data->curcmap_g[index], &g[index], count); 367 memcpy(&data->curcmap_b[index], &b[index], count); 368 data->changed |= DATA_CURCMAP_CHANGED; 369 } 370 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 371 data->cursize = cursorp->size; 372 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 373 memset(data->curimage, 0, sizeof data->curimage); 374 memset(data->curmask, 0, sizeof data->curmask); 375 memcpy(data->curimage, image, icount); 376 memcpy(data->curmask, mask, icount); 377 data->changed |= DATA_CURSHAPE_CHANGED; 378 } 379 380 if (data->changed) 381 data->ramdac_sched_update(data->cookie, bt485_update); 382 splx(s); 383 384 return (0); 385 } 386 387 int 388 bt485_get_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 389 { 390 struct bt485data *data = (struct bt485data *)rc; 391 int error, count; 392 393 /* we return everything they want */ 394 cursorp->which = WSDISPLAY_CURSOR_DOALL; 395 396 cursorp->enable = data->curenb; /* DOCUR */ 397 cursorp->pos = data->curpos; /* DOPOS */ 398 cursorp->hot = data->curhot; /* DOHOT */ 399 400 cursorp->cmap.index = 0; /* DOCMAP */ 401 cursorp->cmap.count = 2; 402 if (cursorp->cmap.red != NULL) { 403 error = copyout(data->curcmap_r, cursorp->cmap.red, 2); 404 if (error) 405 return (error); 406 } 407 if (cursorp->cmap.green != NULL) { 408 error = copyout(data->curcmap_g, cursorp->cmap.green, 2); 409 if (error) 410 return (error); 411 } 412 if (cursorp->cmap.blue != NULL) { 413 error = copyout(data->curcmap_b, cursorp->cmap.blue, 2); 414 if (error) 415 return (error); 416 } 417 418 cursorp->size = data->cursize; /* DOSHAPE */ 419 if (cursorp->image != NULL) { 420 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 421 error = copyout(data->curimage, cursorp->image, count); 422 if (error) 423 return (error); 424 error = copyout(data->curmask, cursorp->mask, count); 425 if (error) 426 return (error); 427 } 428 429 return (0); 430 } 431 432 int 433 bt485_set_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 434 { 435 struct bt485data *data = (struct bt485data *)rc; 436 437 data->curpos = *curposp; 438 bt485_update_curpos(data); 439 440 return (0); 441 } 442 443 int 444 bt485_get_curpos(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 445 { 446 struct bt485data *data = (struct bt485data *)rc; 447 448 *curposp = data->curpos; 449 return (0); 450 } 451 452 int 453 bt485_get_curmax(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 454 { 455 456 curposp->x = curposp->y = CURSOR_MAX_SIZE; 457 return (0); 458 } 459 460 /*****************************************************************************/ 461 462 /* 463 * Internal functions. 464 */ 465 466 inline void 467 bt485_wr_i(struct bt485data *data, u_int8_t ireg, u_int8_t val) 468 { 469 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 470 data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val); 471 } 472 473 inline u_int8_t 474 bt485_rd_i(struct bt485data *data, u_int8_t ireg) 475 { 476 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 477 return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED)); 478 } 479 480 void 481 bt485_update(void *vp) 482 { 483 struct bt485data *data = vp; 484 u_int8_t regval; 485 int count, i, v; 486 487 v = data->changed; 488 data->changed = 0; 489 490 if (v & DATA_ENB_CHANGED) { 491 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 492 if (data->curenb) 493 regval |= 0x01; 494 else 495 regval &= ~0x03; 496 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 497 } 498 499 if (v & DATA_CURCMAP_CHANGED) { 500 /* addr[9:0] assumed to be 0 */ 501 /* set addr[7:0] to 1 */ 502 data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01); 503 504 /* spit out the cursor data */ 505 for (i = 0; i < 2; i++) { 506 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 507 data->curcmap_r[i]); 508 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 509 data->curcmap_g[i]); 510 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 511 data->curcmap_b[i]); 512 } 513 } 514 515 if (v & DATA_CURSHAPE_CHANGED) { 516 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 517 518 /* 519 * Write the cursor image data: 520 * set addr[9:8] to 0, 521 * set addr[7:0] to 0, 522 * spit it all out. 523 */ 524 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 525 regval &= ~0x03; 526 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 527 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 528 for (i = 0; i < count; i++) 529 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 530 data->curimage[i]); 531 532 /* 533 * Write the cursor mask data: 534 * set addr[9:8] to 2, 535 * set addr[7:0] to 0, 536 * spit it all out. 537 */ 538 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 539 regval &= ~0x03; regval |= 0x02; 540 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 541 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 542 for (i = 0; i < count; i++) 543 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 544 data->curmask[i]); 545 546 /* set addr[9:0] back to 0 */ 547 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 548 regval &= ~0x03; 549 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 550 } 551 552 if (v & DATA_CMAP_CHANGED) { 553 /* addr[9:0] assumed to be 0 */ 554 /* set addr[7:0] to 0 */ 555 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00); 556 557 /* spit out the cursor data */ 558 for (i = 0; i < 256; i++) { 559 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 560 data->cmap_r[i]); 561 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 562 data->cmap_g[i]); 563 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 564 data->cmap_b[i]); 565 } 566 } 567 } 568 569 void 570 bt485_update_curpos(struct bt485data *data) 571 { 572 void *cookie = data->cookie; 573 int s, x, y; 574 575 s = spltty(); 576 577 x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x; 578 y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y; 579 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff); 580 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f); 581 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff); 582 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f); 583 584 splx(s); 585 } 586
Indexes created Tue Sep 23 22:09:46 GMT 2025