Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ic/bt485.c
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1 /* $NetBSD: bt485.c,v 1.13 2005/12/11 12:21:26 christos 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@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 1.13 2005/12/11 12:21:26 christos 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(rc) 184 struct ramdac_cookie *rc; 185 { 186 u_int8_t regval; 187 struct bt485data *data = (struct bt485data *)rc; 188 int i; 189 190 /* 191 * Init the BT485 for normal operation. 192 */ 193 194 /* 195 * Allow indirect register access. (Actually, this is 196 * already enabled. In fact, if it is _disabled_, for 197 * some reason the monitor appears to lose sync!!! (?!?!) 198 */ 199 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0); 200 regval |= 0x80; 201 /* 202 * Set the RAMDAC to 8 bit resolution, rather than 6 bit 203 * resolution. 204 */ 205 regval |= 0x02; 206 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval); 207 208 /* Set the RAMDAC to 8BPP (no interestion options). */ 209 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40); 210 211 /* Disable the cursor (for now) */ 212 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 213 regval &= ~0x03; 214 regval |= 0x24; 215 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 216 217 /* Use a 64x64x2 cursor */ 218 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 219 regval |= 0x04; 220 regval |= 0x08; 221 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 222 223 /* Set the Pixel Mask to something useful */ 224 data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff); 225 226 /* 227 * Initialize the RAMDAC info struct to hold all of our 228 * data, and fill it in. 229 */ 230 data->changed = DATA_ALL_CHANGED; 231 232 data->curenb = 0; /* cursor disabled */ 233 data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */ 234 data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */ 235 236 /* initial cursor colormap: 0 is black, 1 is white */ 237 data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0; 238 data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff; 239 240 /* initial cursor data: 64x64 block of white. */ 241 data->cursize.x = data->cursize.y = 64; 242 for (i = 0; i < 512; i++) 243 data->curimage[i] = data->curmask[i] = 0xff; 244 245 /* Initial colormap: 0 is black, everything else is white */ 246 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0; 247 for (i = 1; i < 256; i++) 248 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255; 249 250 bt485_update((void *)data); 251 } 252 253 int 254 bt485_set_cmap(rc, cmapp) 255 struct ramdac_cookie *rc; 256 struct wsdisplay_cmap *cmapp; 257 { 258 struct bt485data *data = (struct bt485data *)rc; 259 u_int count, index; 260 uint8_t r[256], g[256], b[256]; 261 int s, error; 262 263 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index) 264 return (EINVAL); 265 266 index = cmapp->index; 267 count = cmapp->count; 268 error = copyin(cmapp->red, &r[index], count); 269 if (error) 270 return error; 271 error = copyin(cmapp->green, &g[index], count); 272 if (error) 273 return error; 274 error = copyin(cmapp->blue, &b[index], count); 275 if (error) 276 return error; 277 s = spltty(); 278 memcpy(&data->cmap_r[index], &r[index], count); 279 memcpy(&data->cmap_g[index], &g[index], count); 280 memcpy(&data->cmap_b[index], &b[index], count); 281 data->changed |= DATA_CMAP_CHANGED; 282 data->ramdac_sched_update(data->cookie, bt485_update); 283 splx(s); 284 return (0); 285 } 286 287 int 288 bt485_get_cmap(rc, cmapp) 289 struct ramdac_cookie *rc; 290 struct wsdisplay_cmap *cmapp; 291 { 292 struct bt485data *data = (struct bt485data *)rc; 293 u_int count, index; 294 int error; 295 296 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index ) 297 return (EINVAL); 298 299 count = cmapp->count; 300 index = cmapp->index; 301 error = copyout(&data->cmap_r[index], cmapp->red, count); 302 if (error) 303 return (error); 304 error = copyout(&data->cmap_g[index], cmapp->green, count); 305 if (error) 306 return (error); 307 error = copyout(&data->cmap_b[index], cmapp->blue, count); 308 return (error); 309 } 310 311 int 312 bt485_set_cursor(rc, cursorp) 313 struct ramdac_cookie *rc; 314 struct wsdisplay_cursor *cursorp; 315 { 316 struct bt485data *data = (struct bt485data *)rc; 317 u_int count = 0, icount = 0, index = 0, v; 318 char r[2], g[2], b[2], image[512], mask[512]; 319 int s, error; 320 321 v = cursorp->which; 322 323 /* 324 * For DOCMAP and DOSHAPE, copy in the new data 325 * before we do anything that we can't recover from. 326 */ 327 if (v & WSDISPLAY_CURSOR_DOCMAP) { 328 if (cursorp->cmap.index > 2 || 329 (cursorp->cmap.index + cursorp->cmap.count) > 2) 330 return (EINVAL); 331 count = cursorp->cmap.count; 332 index = cursorp->cmap.index; 333 error = copyin(cursorp->cmap.red, &r[index], count); 334 if (error) 335 return error; 336 error = copyin(cursorp->cmap.green, &g[index], count); 337 if (error) 338 return error; 339 error = copyin(cursorp->cmap.blue, &b[index], count); 340 if (error) 341 return error; 342 } 343 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 344 if (cursorp->size.x > CURSOR_MAX_SIZE || 345 cursorp->size.y > CURSOR_MAX_SIZE) 346 return (EINVAL); 347 icount = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 348 error = copyin(cursorp->image, image, icount); 349 if (error) 350 return error; 351 error = copyin(cursorp->mask, mask, icount); 352 if (error) 353 return error; 354 } 355 356 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) { 357 if (v & WSDISPLAY_CURSOR_DOPOS) 358 data->curpos = cursorp->pos; 359 if (v & WSDISPLAY_CURSOR_DOCUR) 360 data->curhot = cursorp->hot; 361 bt485_update_curpos(data); 362 } 363 364 s = spltty(); 365 366 /* Data is all available; perform the requested operations. */ 367 if (v & WSDISPLAY_CURSOR_DOCUR) { 368 data->curenb = cursorp->enable; 369 data->changed |= DATA_ENB_CHANGED; 370 } 371 if (v & WSDISPLAY_CURSOR_DOCMAP) { 372 memcpy(&data->curcmap_r[index], &r[index], count); 373 memcpy(&data->curcmap_g[index], &g[index], count); 374 memcpy(&data->curcmap_b[index], &b[index], count); 375 data->changed |= DATA_CURCMAP_CHANGED; 376 } 377 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 378 data->cursize = cursorp->size; 379 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 380 memset(data->curimage, 0, sizeof data->curimage); 381 memset(data->curmask, 0, sizeof data->curmask); 382 memcpy(data->curimage, image, icount); 383 memcpy(data->curmask, mask, icount); 384 data->changed |= DATA_CURSHAPE_CHANGED; 385 } 386 387 if (data->changed) 388 data->ramdac_sched_update(data->cookie, bt485_update); 389 splx(s); 390 391 return (0); 392 } 393 394 int 395 bt485_get_cursor(rc, cursorp) 396 struct ramdac_cookie *rc; 397 struct wsdisplay_cursor *cursorp; 398 { 399 struct bt485data *data = (struct bt485data *)rc; 400 int error, count; 401 402 /* we return everything they want */ 403 cursorp->which = WSDISPLAY_CURSOR_DOALL; 404 405 cursorp->enable = data->curenb; /* DOCUR */ 406 cursorp->pos = data->curpos; /* DOPOS */ 407 cursorp->hot = data->curhot; /* DOHOT */ 408 409 cursorp->cmap.index = 0; /* DOCMAP */ 410 cursorp->cmap.count = 2; 411 if (cursorp->cmap.red != NULL) { 412 error = copyout(data->curcmap_r, cursorp->cmap.red, 2); 413 if (error) 414 return (error); 415 } 416 if (cursorp->cmap.green != NULL) { 417 error = copyout(data->curcmap_g, cursorp->cmap.green, 2); 418 if (error) 419 return (error); 420 } 421 if (cursorp->cmap.blue != NULL) { 422 error = copyout(data->curcmap_b, cursorp->cmap.blue, 2); 423 if (error) 424 return (error); 425 } 426 427 cursorp->size = data->cursize; /* DOSHAPE */ 428 if (cursorp->image != NULL) { 429 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 430 error = copyout(data->curimage, cursorp->image, count); 431 if (error) 432 return (error); 433 error = copyout(data->curmask, cursorp->mask, count); 434 if (error) 435 return (error); 436 } 437 438 return (0); 439 } 440 441 int 442 bt485_set_curpos(rc, curposp) 443 struct ramdac_cookie *rc; 444 struct wsdisplay_curpos *curposp; 445 { 446 struct bt485data *data = (struct bt485data *)rc; 447 448 data->curpos = *curposp; 449 bt485_update_curpos(data); 450 451 return (0); 452 } 453 454 int 455 bt485_get_curpos(rc, curposp) 456 struct ramdac_cookie *rc; 457 struct wsdisplay_curpos *curposp; 458 { 459 struct bt485data *data = (struct bt485data *)rc; 460 461 *curposp = data->curpos; 462 return (0); 463 } 464 465 int 466 bt485_get_curmax(rc, curposp) 467 struct ramdac_cookie *rc; 468 struct wsdisplay_curpos *curposp; 469 { 470 471 curposp->x = curposp->y = CURSOR_MAX_SIZE; 472 return (0); 473 } 474 475 /*****************************************************************************/ 476 477 /* 478 * Internal functions. 479 */ 480 481 inline void 482 bt485_wr_i(data, ireg, val) 483 struct bt485data *data; 484 u_int8_t ireg; 485 u_int8_t val; 486 { 487 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 488 data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val); 489 } 490 491 inline u_int8_t 492 bt485_rd_i(data, ireg) 493 struct bt485data *data; 494 u_int8_t ireg; 495 { 496 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 497 return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED)); 498 } 499 500 void 501 bt485_update(vp) 502 void *vp; 503 { 504 struct bt485data *data = vp; 505 u_int8_t regval; 506 int count, i, v; 507 508 v = data->changed; 509 data->changed = 0; 510 511 if (v & DATA_ENB_CHANGED) { 512 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 513 if (data->curenb) 514 regval |= 0x01; 515 else 516 regval &= ~0x03; 517 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 518 } 519 520 if (v & DATA_CURCMAP_CHANGED) { 521 /* addr[9:0] assumed to be 0 */ 522 /* set addr[7:0] to 1 */ 523 data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01); 524 525 /* spit out the cursor data */ 526 for (i = 0; i < 2; i++) { 527 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 528 data->curcmap_r[i]); 529 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 530 data->curcmap_g[i]); 531 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 532 data->curcmap_b[i]); 533 } 534 } 535 536 if (v & DATA_CURSHAPE_CHANGED) { 537 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 538 539 /* 540 * Write the cursor image data: 541 * set addr[9:8] to 0, 542 * set addr[7:0] to 0, 543 * spit it all out. 544 */ 545 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 546 regval &= ~0x03; 547 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 548 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 549 for (i = 0; i < count; i++) 550 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 551 data->curimage[i]); 552 553 /* 554 * Write the cursor mask data: 555 * set addr[9:8] to 2, 556 * set addr[7:0] to 0, 557 * spit it all out. 558 */ 559 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 560 regval &= ~0x03; regval |= 0x02; 561 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 562 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 563 for (i = 0; i < count; i++) 564 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 565 data->curmask[i]); 566 567 /* set addr[9:0] back to 0 */ 568 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 569 regval &= ~0x03; 570 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 571 } 572 573 if (v & DATA_CMAP_CHANGED) { 574 /* addr[9:0] assumed to be 0 */ 575 /* set addr[7:0] to 0 */ 576 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00); 577 578 /* spit out the cursor data */ 579 for (i = 0; i < 256; i++) { 580 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 581 data->cmap_r[i]); 582 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 583 data->cmap_g[i]); 584 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 585 data->cmap_b[i]); 586 } 587 } 588 } 589 590 void 591 bt485_update_curpos(data) 592 struct bt485data *data; 593 { 594 void *cookie = data->cookie; 595 int s, x, y; 596 597 s = spltty(); 598 599 x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x; 600 y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y; 601 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff); 602 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f); 603 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff); 604 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f); 605 606 splx(s); 607 }
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