Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/bt485.c
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1 /* $NetBSD: bt485.c,v 1.18 2018/01/24 05:35:58 riastradh 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 1.18 2018/01/24 05:35:58 riastradh 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 */ 120 121 void bt485_update(void *); 122 void bt485_update_curpos(struct bt485data *); 123 124 static inline void 125 bt485_wr_i(struct bt485data *data, u_int8_t ireg, u_int8_t val) 126 { 127 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 128 data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val); 129 } 130 131 static inline u_int8_t 132 bt485_rd_i(struct bt485data *data, u_int8_t ireg) 133 { 134 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg); 135 return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED)); 136 } 137 138 /*****************************************************************************/ 139 140 /* 141 * Functions exported via the RAMDAC configuration table. 142 */ 143 144 struct ramdac_funcs * 145 bt485_funcs(void) 146 { 147 return &bt485_funcsstruct; 148 } 149 150 struct ramdac_cookie * 151 bt485_register( 152 void *v, 153 int (*sched_update)(void *, void (*)(void *)), 154 void (*wr)(void *, u_int, u_int8_t), 155 u_int8_t (*rd)(void *, u_int)) 156 { 157 struct bt485data *data; 158 /* 159 * XXX -- comment out of date. rcd. 160 * If we should allocate a new private info struct, do so. 161 * Otherwise, use the one we have (if it's there), or 162 * use the temporary one on the stack. 163 */ 164 data = malloc(sizeof *data, M_DEVBUF, M_WAITOK); 165 /* XXX -- if !data */ 166 data->cookie = v; 167 data->ramdac_sched_update = sched_update; 168 data->ramdac_wr = wr; 169 data->ramdac_rd = rd; 170 return (struct ramdac_cookie *)data; 171 } 172 173 /* 174 * This function exists solely to provide a means to init 175 * the RAMDAC without first registering. It is useful for 176 * initializing the console early on. 177 */ 178 void 179 bt485_cninit( 180 void *v, 181 int (*sched_update)(void *, void (*)(void *)), 182 void (*wr)(void *, u_int, u_int8_t), 183 u_int8_t (*rd)(void *, u_int)) 184 { 185 struct bt485data tmp, *data = &tmp; 186 data->cookie = v; 187 data->ramdac_sched_update = sched_update; 188 data->ramdac_wr = wr; 189 data->ramdac_rd = rd; 190 bt485_init((struct ramdac_cookie *)data); 191 } 192 193 void 194 bt485_init(struct ramdac_cookie *rc) 195 { 196 u_int8_t regval; 197 struct bt485data *data = (struct bt485data *)rc; 198 int i; 199 200 /* 201 * Init the BT485 for normal operation. 202 */ 203 204 /* 205 * Allow indirect register access. (Actually, this is 206 * already enabled. In fact, if it is _disabled_, for 207 * some reason the monitor appears to lose sync!!! (?!?!) 208 */ 209 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0); 210 regval |= 0x80; 211 /* 212 * Set the RAMDAC to 8 bit resolution, rather than 6 bit 213 * resolution. 214 */ 215 regval |= 0x02; 216 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval); 217 218 /* Set the RAMDAC to 8BPP (no interestion options). */ 219 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40); 220 221 /* Disable the cursor (for now) */ 222 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 223 regval &= ~0x03; 224 regval |= 0x24; 225 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 226 227 /* Use a 64x64x2 cursor */ 228 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 229 regval |= 0x04; 230 regval |= 0x08; 231 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 232 233 /* Set the Pixel Mask to something useful */ 234 data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff); 235 236 /* 237 * Initialize the RAMDAC info struct to hold all of our 238 * data, and fill it in. 239 */ 240 data->changed = DATA_ALL_CHANGED; 241 242 data->curenb = 0; /* cursor disabled */ 243 data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */ 244 data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */ 245 246 /* initial cursor colormap: 0 is black, 1 is white */ 247 data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0; 248 data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff; 249 250 /* initial cursor data: 64x64 block of white. */ 251 data->cursize.x = data->cursize.y = 64; 252 for (i = 0; i < 512; i++) 253 data->curimage[i] = data->curmask[i] = 0xff; 254 255 /* Initial colormap: 0 is black, everything else is white */ 256 data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0; 257 for (i = 1; i < 256; i++) 258 data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255; 259 260 bt485_update((void *)data); 261 } 262 263 int 264 bt485_set_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 265 { 266 struct bt485data *data = (struct bt485data *)rc; 267 u_int count, index; 268 uint8_t r[256], g[256], b[256]; 269 int s, error; 270 271 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index) 272 return (EINVAL); 273 274 index = cmapp->index; 275 count = cmapp->count; 276 error = copyin(cmapp->red, &r[index], count); 277 if (error) 278 return error; 279 error = copyin(cmapp->green, &g[index], count); 280 if (error) 281 return error; 282 error = copyin(cmapp->blue, &b[index], count); 283 if (error) 284 return error; 285 s = spltty(); 286 memcpy(&data->cmap_r[index], &r[index], count); 287 memcpy(&data->cmap_g[index], &g[index], count); 288 memcpy(&data->cmap_b[index], &b[index], count); 289 data->changed |= DATA_CMAP_CHANGED; 290 data->ramdac_sched_update(data->cookie, bt485_update); 291 splx(s); 292 return (0); 293 } 294 295 int 296 bt485_get_cmap(struct ramdac_cookie *rc, struct wsdisplay_cmap *cmapp) 297 { 298 struct bt485data *data = (struct bt485data *)rc; 299 u_int count, index; 300 int error; 301 302 if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index ) 303 return (EINVAL); 304 305 count = cmapp->count; 306 index = cmapp->index; 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(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 319 { 320 struct bt485data *data = (struct bt485data *)rc; 321 u_int count = 0, icount = 0, index = 0, v; 322 char r[2], g[2], b[2], image[512], mask[512]; 323 int s, error; 324 325 v = cursorp->which; 326 327 /* 328 * For DOCMAP and DOSHAPE, copy in the new data 329 * before we do anything that we can't recover from. 330 */ 331 if (v & WSDISPLAY_CURSOR_DOCMAP) { 332 if (cursorp->cmap.index > 2 || 333 cursorp->cmap.count > 2 - cursorp->cmap.index) 334 return (EINVAL); 335 count = cursorp->cmap.count; 336 index = cursorp->cmap.index; 337 error = copyin(cursorp->cmap.red, &r[index], count); 338 if (error) 339 return error; 340 error = copyin(cursorp->cmap.green, &g[index], count); 341 if (error) 342 return error; 343 error = copyin(cursorp->cmap.blue, &b[index], count); 344 if (error) 345 return error; 346 } 347 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 348 if (cursorp->size.x > CURSOR_MAX_SIZE || 349 cursorp->size.y > CURSOR_MAX_SIZE) 350 return (EINVAL); 351 icount = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 352 error = copyin(cursorp->image, image, icount); 353 if (error) 354 return error; 355 error = copyin(cursorp->mask, mask, icount); 356 if (error) 357 return error; 358 } 359 360 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) { 361 if (v & WSDISPLAY_CURSOR_DOPOS) 362 data->curpos = cursorp->pos; 363 if (v & WSDISPLAY_CURSOR_DOCUR) 364 data->curhot = cursorp->hot; 365 bt485_update_curpos(data); 366 } 367 368 s = spltty(); 369 370 /* Data is all available; perform the requested operations. */ 371 if (v & WSDISPLAY_CURSOR_DOCUR) { 372 data->curenb = cursorp->enable; 373 data->changed |= DATA_ENB_CHANGED; 374 } 375 if (v & WSDISPLAY_CURSOR_DOCMAP) { 376 memcpy(&data->curcmap_r[index], &r[index], count); 377 memcpy(&data->curcmap_g[index], &g[index], count); 378 memcpy(&data->curcmap_b[index], &b[index], count); 379 data->changed |= DATA_CURCMAP_CHANGED; 380 } 381 if (v & WSDISPLAY_CURSOR_DOSHAPE) { 382 data->cursize = cursorp->size; 383 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 384 memset(data->curimage, 0, sizeof data->curimage); 385 memset(data->curmask, 0, sizeof data->curmask); 386 memcpy(data->curimage, image, icount); 387 memcpy(data->curmask, mask, icount); 388 data->changed |= DATA_CURSHAPE_CHANGED; 389 } 390 391 if (data->changed) 392 data->ramdac_sched_update(data->cookie, bt485_update); 393 splx(s); 394 395 return (0); 396 } 397 398 int 399 bt485_get_cursor(struct ramdac_cookie *rc, struct wsdisplay_cursor *cursorp) 400 { 401 struct bt485data *data = (struct bt485data *)rc; 402 int error, count; 403 404 /* we return everything they want */ 405 cursorp->which = WSDISPLAY_CURSOR_DOALL; 406 407 cursorp->enable = data->curenb; /* DOCUR */ 408 cursorp->pos = data->curpos; /* DOPOS */ 409 cursorp->hot = data->curhot; /* DOHOT */ 410 411 cursorp->cmap.index = 0; /* DOCMAP */ 412 cursorp->cmap.count = 2; 413 if (cursorp->cmap.red != NULL) { 414 error = copyout(data->curcmap_r, cursorp->cmap.red, 2); 415 if (error) 416 return (error); 417 } 418 if (cursorp->cmap.green != NULL) { 419 error = copyout(data->curcmap_g, cursorp->cmap.green, 2); 420 if (error) 421 return (error); 422 } 423 if (cursorp->cmap.blue != NULL) { 424 error = copyout(data->curcmap_b, cursorp->cmap.blue, 2); 425 if (error) 426 return (error); 427 } 428 429 cursorp->size = data->cursize; /* DOSHAPE */ 430 if (cursorp->image != NULL) { 431 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 432 error = copyout(data->curimage, cursorp->image, count); 433 if (error) 434 return (error); 435 error = copyout(data->curmask, cursorp->mask, count); 436 if (error) 437 return (error); 438 } 439 440 return (0); 441 } 442 443 int 444 bt485_set_curpos(struct ramdac_cookie *rc, 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(struct ramdac_cookie *rc, 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(struct ramdac_cookie *rc, struct wsdisplay_curpos *curposp) 465 { 466 467 curposp->x = curposp->y = CURSOR_MAX_SIZE; 468 return (0); 469 } 470 471 /*****************************************************************************/ 472 473 /* 474 * Internal functions. 475 */ 476 477 void 478 bt485_update(void *vp) 479 { 480 struct bt485data *data = vp; 481 u_int8_t regval; 482 int count, i, v; 483 484 v = data->changed; 485 data->changed = 0; 486 487 if (v & DATA_ENB_CHANGED) { 488 regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2); 489 if (data->curenb) 490 regval |= 0x01; 491 else 492 regval &= ~0x03; 493 data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval); 494 } 495 496 if (v & DATA_CURCMAP_CHANGED) { 497 /* addr[9:0] assumed to be 0 */ 498 /* set addr[7:0] to 1 */ 499 data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01); 500 501 /* spit out the cursor data */ 502 for (i = 0; i < 2; i++) { 503 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 504 data->curcmap_r[i]); 505 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 506 data->curcmap_g[i]); 507 data->ramdac_wr(data->cookie, BT485_REG_COCDATA, 508 data->curcmap_b[i]); 509 } 510 } 511 512 if (v & DATA_CURSHAPE_CHANGED) { 513 count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y; 514 515 /* 516 * Write the cursor image data: 517 * set addr[9:8] to 0, 518 * set addr[7:0] to 0, 519 * spit it all out. 520 */ 521 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 522 regval &= ~0x03; 523 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 524 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 525 for (i = 0; i < count; i++) 526 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 527 data->curimage[i]); 528 529 /* 530 * Write the cursor mask data: 531 * set addr[9:8] to 2, 532 * set addr[7:0] to 0, 533 * spit it all out. 534 */ 535 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 536 regval &= ~0x03; regval |= 0x02; 537 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 538 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0); 539 for (i = 0; i < count; i++) 540 data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM, 541 data->curmask[i]); 542 543 /* set addr[9:0] back to 0 */ 544 regval = bt485_rd_i(data, BT485_IREG_COMMAND_3); 545 regval &= ~0x03; 546 bt485_wr_i(data, BT485_IREG_COMMAND_3, regval); 547 } 548 549 if (v & DATA_CMAP_CHANGED) { 550 /* addr[9:0] assumed to be 0 */ 551 /* set addr[7:0] to 0 */ 552 data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00); 553 554 /* spit out the cursor data */ 555 for (i = 0; i < 256; i++) { 556 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 557 data->cmap_r[i]); 558 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 559 data->cmap_g[i]); 560 data->ramdac_wr(data->cookie, BT485_REG_PALETTE, 561 data->cmap_b[i]); 562 } 563 } 564 } 565 566 void 567 bt485_update_curpos(struct bt485data *data) 568 { 569 void *cookie = data->cookie; 570 int s, x, y; 571 572 s = spltty(); 573 574 x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x; 575 y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y; 576 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff); 577 data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f); 578 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff); 579 data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f); 580 581 splx(s); 582 }
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