cg4.c revision 1.13
1 /* $NetBSD: cg4.c,v 1.13 1998/01/12 20:32:19 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93 45 */ 46 47 /* 48 * color display (cg4) driver. 49 * 50 * Credits, history: 51 * Gordon Ross created this driver based on the cg3 driver from 52 * the sparc port as distributed in BSD 4.4 Lite, but included 53 * support for only the "type B" adapter (Brooktree DACs). 54 * Ezra Story added support for the "type A" (AMD DACs). 55 * 56 * Todo: 57 * Make this driver handle video interrupts. 58 * Defer colormap updates to vertical retrace interrupts. 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/conf.h> 64 #include <sys/device.h> 65 #include <sys/ioctl.h> 66 #include <sys/malloc.h> 67 #include <sys/mman.h> 68 #include <sys/proc.h> 69 #include <sys/tty.h> 70 71 #include <vm/vm.h> 72 73 #include <machine/autoconf.h> 74 #include <machine/cpu.h> 75 #include <machine/fbio.h> 76 #include <machine/idprom.h> 77 #include <machine/pmap.h> 78 79 #include "fbvar.h" 80 #include "btreg.h" 81 #include "btvar.h" 82 #include "cg4reg.h" 83 84 cdev_decl(cg4); 85 86 #define CG4_MMAP_SIZE (CG4_OVERLAY_SIZE + CG4_ENABLE_SIZE + CG4_PIXMAP_SIZE) 87 88 extern unsigned char cpu_machine_id; 89 90 #define CMAP_SIZE 256 91 struct soft_cmap { 92 u_char r[CMAP_SIZE]; 93 u_char g[CMAP_SIZE]; 94 u_char b[CMAP_SIZE]; 95 }; 96 97 /* per-display variables */ 98 struct cg4_softc { 99 struct device sc_dev; /* base device */ 100 struct fbdevice sc_fb; /* frame buffer device */ 101 int sc_cg4type; /* A or B */ 102 void *sc_va_cmap; /* Colormap h/w (mapped KVA) */ 103 int sc_pa_overlay; /* phys. addr. of overlay plane */ 104 int sc_pa_enable; /* phys. addr. of enable plane */ 105 int sc_pa_pixmap; /* phys. addr. of color plane */ 106 int sc_blanked; /* true if blanked */ 107 108 union bt_cmap *sc_btcm; /* Brooktree color map */ 109 struct soft_cmap sc_cmap; /* Generic soft colormap. */ 110 }; 111 112 /* autoconfiguration driver */ 113 static void cg4attach __P((struct device *, struct device *, void *)); 114 static int cg4match __P((struct device *, struct cfdata *, void *)); 115 116 struct cfattach cgfour_ca = { 117 sizeof(struct cg4_softc), cg4match, cg4attach 118 }; 119 120 extern struct cfdriver cgfour_cd; 121 122 static int cg4gattr __P((struct fbdevice *, void *)); 123 static int cg4gvideo __P((struct fbdevice *, void *)); 124 static int cg4svideo __P((struct fbdevice *, void *)); 125 static int cg4getcmap __P((struct fbdevice *, void *)); 126 static int cg4putcmap __P((struct fbdevice *, void *)); 127 128 static void cg4a_init __P((struct cg4_softc *)); 129 static void cg4a_svideo __P((struct cg4_softc *, int)); 130 static void cg4a_ldcmap __P((struct cg4_softc *)); 131 132 static void cg4b_init __P((struct cg4_softc *)); 133 static void cg4b_svideo __P((struct cg4_softc *, int)); 134 static void cg4b_ldcmap __P((struct cg4_softc *)); 135 136 static struct fbdriver cg4_fbdriver = { 137 cg4open, cg4close, cg4mmap, cg4gattr, 138 cg4gvideo, cg4svideo, 139 cg4getcmap, cg4putcmap }; 140 141 /* 142 * Match a cg4. 143 */ 144 static int 145 cg4match(parent, cf, args) 146 struct device *parent; 147 struct cfdata *cf; 148 void *args; 149 { 150 struct confargs *ca = args; 151 int paddr; 152 153 /* XXX: Huge hack due to lack of probe info... */ 154 /* XXX: Machines that might have a cg4 (gag). */ 155 /* XXX: Need info on the "P4" register... */ 156 switch (cpu_machine_id) { 157 158 case SUN3_MACH_110: 159 /* XXX: Assume type A. */ 160 if (ca->ca_paddr == -1) 161 ca->ca_paddr = CG4A_DEF_BASE; 162 if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) 163 return (0); 164 if (bus_peek(BUS_OBIO, CG4A_OBIO_CMAP, 1) == -1) 165 return (0); 166 break; 167 168 case SUN3_MACH_60: 169 /* XXX: Assume type A. */ 170 if (ca->ca_paddr == -1) 171 ca->ca_paddr = CG4B_DEF_BASE; 172 paddr = ca->ca_paddr; 173 if (bus_peek(ca->ca_bustype, paddr, 1) == -1) 174 return (0); 175 /* Make sure we're color */ 176 paddr += CG4B_OFF_PIXMAP; 177 if (bus_peek(ca->ca_bustype, paddr, 1) == -1) 178 return (0); 179 break; 180 181 default: 182 return (0); 183 } 184 185 return (1); 186 } 187 188 /* 189 * Attach a display. We need to notice if it is the console, too. 190 */ 191 static void 192 cg4attach(parent, self, args) 193 struct device *parent, *self; 194 void *args; 195 { 196 struct cg4_softc *sc = (struct cg4_softc *)self; 197 struct fbdevice *fb = &sc->sc_fb; 198 struct confargs *ca = args; 199 struct fbtype *fbt; 200 201 /* XXX: should do better than this... */ 202 switch (cpu_machine_id) { 203 case SUN3_MACH_110: 204 sc->sc_cg4type = CG4_TYPE_A; 205 break; 206 case SUN3_MACH_60: 207 default: 208 sc->sc_cg4type = CG4_TYPE_B; 209 } 210 211 fb->fb_driver = &cg4_fbdriver; 212 fb->fb_private = sc; 213 fb->fb_name = sc->sc_dev.dv_xname; 214 215 fbt = &fb->fb_fbtype; 216 fbt->fb_type = FBTYPE_SUN4COLOR; 217 fbt->fb_depth = 8; 218 fbt->fb_cmsize = 256; 219 220 fbt->fb_width = 1152; 221 fbt->fb_height = 900; 222 fbt->fb_size = CG4_MMAP_SIZE; 223 224 switch (sc->sc_cg4type) { 225 case CG4_TYPE_A: /* Sun3/110 */ 226 sc->sc_va_cmap = bus_mapin(BUS_OBIO, CG4A_OBIO_CMAP, 227 sizeof(struct amd_regs)); 228 sc->sc_pa_overlay = ca->ca_paddr + CG4A_OFF_OVERLAY; 229 sc->sc_pa_enable = ca->ca_paddr + CG4A_OFF_ENABLE; 230 sc->sc_pa_pixmap = ca->ca_paddr + CG4A_OFF_PIXMAP; 231 sc->sc_btcm = NULL; 232 cg4a_init(sc); 233 break; 234 235 case CG4_TYPE_B: /* Sun3/60 */ 236 default: 237 sc->sc_va_cmap = (struct bt_regs *) 238 bus_mapin(ca->ca_bustype, ca->ca_paddr, 239 sizeof(struct bt_regs *)); 240 sc->sc_pa_overlay = ca->ca_paddr + CG4B_OFF_OVERLAY; 241 sc->sc_pa_enable = ca->ca_paddr + CG4B_OFF_ENABLE; 242 sc->sc_pa_pixmap = ca->ca_paddr + CG4B_OFF_PIXMAP; 243 sc->sc_btcm = malloc(sizeof(union bt_cmap), M_DEVBUF, M_WAITOK); 244 cg4b_init(sc); 245 break; 246 } 247 248 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 249 fb_attach(fb, 4); 250 } 251 252 int 253 cg4open(dev, flags, mode, p) 254 dev_t dev; 255 int flags, mode; 256 struct proc *p; 257 { 258 int unit = minor(dev); 259 260 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 261 return (ENXIO); 262 return (0); 263 } 264 265 int 266 cg4close(dev, flags, mode, p) 267 dev_t dev; 268 int flags, mode; 269 struct proc *p; 270 { 271 272 return (0); 273 } 274 275 int 276 cg4ioctl(dev, cmd, data, flags, p) 277 dev_t dev; 278 u_long cmd; 279 caddr_t data; 280 int flags; 281 struct proc *p; 282 { 283 struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 284 285 return (fbioctlfb(&sc->sc_fb, cmd, data)); 286 } 287 288 /* 289 * Return the address that would map the given device at the given 290 * offset, allowing for the given protection, or return -1 for error. 291 * 292 * X11 expects its mmap'd region to look like this: 293 * 128k overlay data memory 294 * 128k overlay enable bitmap 295 * 1024k color memory 296 * 297 * The hardware really looks like this (starting at ca_paddr) 298 * 4 bytes Brooktree DAC registers 299 * 2MB-4 gap 300 * 128k overlay memory 301 * 1920k gap 302 * 128k overlay-enable bitmap 303 * 1920k gap 304 * 1024k color memory 305 */ 306 int 307 cg4mmap(dev, off, prot) 308 dev_t dev; 309 register int off; 310 int prot; 311 { 312 struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 313 register int physbase; 314 315 if (off & PGOFSET) 316 panic("cg4mmap"); 317 318 if ((unsigned)off >= CG4_MMAP_SIZE) 319 return (-1); 320 321 if (off < 0x40000) { 322 if (off < 0x20000) { 323 physbase = sc->sc_pa_overlay; 324 } else { 325 /* enable plane */ 326 off -= 0x20000; 327 physbase = sc->sc_pa_enable; 328 } 329 } else { 330 /* pixel map */ 331 off -= 0x40000; 332 physbase = sc->sc_pa_pixmap; 333 } 334 335 /* 336 * I turned on PMAP_NC here to disable the cache as I was 337 * getting horribly broken behaviour with it on. 338 */ 339 return ((physbase + off) | PMAP_NC); 340 } 341 342 /* 343 * Internal ioctl functions. 344 */ 345 346 /* FBIOGATTR: */ 347 static int cg4gattr(fb, data) 348 struct fbdevice *fb; 349 void *data; 350 { 351 struct fbgattr *fba = data; 352 353 fba->real_type = fb->fb_fbtype.fb_type; 354 fba->owner = 0; /* XXX - TIOCCONS stuff? */ 355 fba->fbtype = fb->fb_fbtype; 356 fba->sattr.flags = 0; 357 fba->sattr.emu_type = fb->fb_fbtype.fb_type; 358 fba->sattr.dev_specific[0] = -1; 359 fba->emu_types[0] = fb->fb_fbtype.fb_type; 360 fba->emu_types[1] = -1; 361 return (0); 362 } 363 364 /* FBIOGVIDEO: */ 365 static int cg4gvideo(fb, data) 366 struct fbdevice *fb; 367 void *data; 368 { 369 int *on = data; 370 struct cg4_softc *sc = fb->fb_private; 371 372 *on = !sc->sc_blanked; 373 return (0); 374 } 375 376 /* FBIOSVIDEO: */ 377 static int cg4svideo(fb, data) 378 struct fbdevice *fb; 379 void *data; 380 { 381 int *on = data; 382 struct cg4_softc *sc = fb->fb_private; 383 int state; 384 385 state = *on; 386 if (sc->sc_cg4type == CG4_TYPE_A) 387 cg4a_svideo(sc, state); 388 else 389 cg4b_svideo(sc, state); 390 return (0); 391 } 392 393 /* 394 * FBIOGETCMAP: 395 * Copy current colormap out to user space. 396 */ 397 static int cg4getcmap(fb, data) 398 struct fbdevice *fb; 399 void *data; 400 { 401 struct fbcmap *fbcm = data; 402 struct cg4_softc *sc = fb->fb_private; 403 struct soft_cmap *cm = &sc->sc_cmap; 404 int error, start, count; 405 406 start = fbcm->index; 407 count = fbcm->count; 408 if ((start < 0) || (start >= CMAP_SIZE) || 409 (count < 0) || (start + count > CMAP_SIZE) ) 410 return (EINVAL); 411 412 if ((error = copyout(&cm->r[start], fbcm->red, count)) != 0) 413 return (error); 414 415 if ((error = copyout(&cm->g[start], fbcm->green, count)) != 0) 416 return (error); 417 418 if ((error = copyout(&cm->b[start], fbcm->blue, count)) != 0) 419 return (error); 420 421 return (0); 422 } 423 424 /* 425 * FBIOPUTCMAP: 426 * Copy new colormap from user space and load. 427 */ 428 static int cg4putcmap(fb, data) 429 struct fbdevice *fb; 430 void *data; 431 { 432 struct fbcmap *fbcm = data; 433 struct cg4_softc *sc = fb->fb_private; 434 struct soft_cmap *cm = &sc->sc_cmap; 435 int error, start, count; 436 437 start = fbcm->index; 438 count = fbcm->count; 439 if ((start < 0) || (start >= CMAP_SIZE) || 440 (count < 0) || (start + count > CMAP_SIZE) ) 441 return (EINVAL); 442 443 if ((error = copyin(fbcm->red, &cm->r[start], count)) != 0) 444 return (error); 445 446 if ((error = copyin(fbcm->green, &cm->g[start], count)) != 0) 447 return (error); 448 449 if ((error = copyin(fbcm->blue, &cm->b[start], count)) != 0) 450 return (error); 451 452 if (sc->sc_cg4type == CG4_TYPE_A) 453 cg4a_ldcmap(sc); 454 else 455 cg4b_ldcmap(sc); 456 457 return (0); 458 } 459 460 /**************************************************************** 461 * Routines for the "Type A" hardware 462 ****************************************************************/ 463 464 static void 465 cg4a_init(sc) 466 struct cg4_softc *sc; 467 { 468 volatile struct amd_regs *ar = sc->sc_va_cmap; 469 struct soft_cmap *cm = &sc->sc_cmap; 470 int i; 471 472 /* grab initial (current) color map */ 473 for(i = 0; i < 256; i++) { 474 cm->r[i] = ar->r[i]; 475 cm->g[i] = ar->g[i]; 476 cm->b[i] = ar->b[i]; 477 } 478 } 479 480 static void 481 cg4a_ldcmap(sc) 482 struct cg4_softc *sc; 483 { 484 volatile struct amd_regs *ar = sc->sc_va_cmap; 485 struct soft_cmap *cm = &sc->sc_cmap; 486 int i; 487 488 /* 489 * Now blast them into the chip! 490 * XXX Should use retrace interrupt! 491 * Just set a "need load" bit and let the 492 * retrace interrupt handler do the work. 493 */ 494 for(i = 0; i < 256; i++) { 495 ar->r[i] = cm->r[i]; 496 ar->g[i] = cm->g[i]; 497 ar->b[i] = cm->b[i]; 498 } 499 } 500 501 static void 502 cg4a_svideo(sc, on) 503 struct cg4_softc *sc; 504 int on; 505 { 506 volatile struct amd_regs *ar = sc->sc_va_cmap; 507 int i; 508 509 if ((on == 0) && (sc->sc_blanked == 0)) { 510 /* Turn OFF video (make it blank). */ 511 sc->sc_blanked = 1; 512 /* Load fake "all zero" colormap. */ 513 for (i = 0; i < 256; i++) { 514 ar->r[i] = 0; 515 ar->g[i] = 0; 516 ar->b[i] = 0; 517 } 518 } 519 520 if ((on != 0) && (sc->sc_blanked != 0)) { 521 /* Turn video back ON (unblank). */ 522 sc->sc_blanked = 0; 523 /* Restore normal colormap. */ 524 cg4a_ldcmap(sc); 525 } 526 } 527 528 529 /**************************************************************** 530 * Routines for the "Type B" hardware 531 ****************************************************************/ 532 533 static void 534 cg4b_init(sc) 535 struct cg4_softc *sc; 536 { 537 volatile struct bt_regs *bt = sc->sc_va_cmap; 538 struct soft_cmap *cm = &sc->sc_cmap; 539 union bt_cmap *btcm = sc->sc_btcm; 540 int i; 541 542 /* 543 * BT458 chip initialization as described in Brooktree's 544 * 1993 Graphics and Imaging Product Databook (DB004-1/93). 545 */ 546 bt->bt_addr = 0x04; /* select read mask register */ 547 bt->bt_ctrl = 0xff; /* all planes on */ 548 bt->bt_addr = 0x05; /* select blink mask register */ 549 bt->bt_ctrl = 0x00; /* all planes non-blinking */ 550 bt->bt_addr = 0x06; /* select command register */ 551 bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */ 552 bt->bt_addr = 0x07; /* select test register */ 553 bt->bt_ctrl = 0x00; /* set test mode */ 554 555 /* grab initial (current) color map */ 556 bt->bt_addr = 0; 557 for (i = 0; i < (256 * 3 / 4); i++) { 558 btcm->cm_chip[i] = bt->bt_cmap; 559 } 560 561 /* Transpose into S/W form. */ 562 for (i = 0; i < 256; i++) { 563 cm->r[i] = btcm->cm_map[i][0]; 564 cm->g[i] = btcm->cm_map[i][1]; 565 cm->b[i] = btcm->cm_map[i][2]; 566 } 567 } 568 569 static void 570 cg4b_ldcmap(sc) 571 struct cg4_softc *sc; 572 { 573 volatile struct bt_regs *bt = sc->sc_va_cmap; 574 struct soft_cmap *cm = &sc->sc_cmap; 575 union bt_cmap *btcm = sc->sc_btcm; 576 int i; 577 578 /* 579 * Now blast them into the chip! 580 * XXX Should use retrace interrupt! 581 * Just set a "need load" bit and let the 582 * retrace interrupt handler do the work. 583 */ 584 585 /* Transpose into H/W form. */ 586 for (i = 0; i < 256; i++) { 587 btcm->cm_map[i][0] = cm->r[i]; 588 btcm->cm_map[i][1] = cm->g[i]; 589 btcm->cm_map[i][2] = cm->b[i]; 590 } 591 592 bt->bt_addr = 0; 593 for (i = 0; i < (256 * 3 / 4); i++) { 594 bt->bt_cmap = btcm->cm_chip[i]; 595 } 596 } 597 598 static void 599 cg4b_svideo(sc, on) 600 struct cg4_softc *sc; 601 int on; 602 { 603 volatile struct bt_regs *bt = sc->sc_va_cmap; 604 int i; 605 606 if ((on == 0) && (sc->sc_blanked == 0)) { 607 /* Turn OFF video (make it blank). */ 608 sc->sc_blanked = 1; 609 /* Load fake "all zero" colormap. */ 610 bt->bt_addr = 0; 611 for (i = 0; i < (256 * 3 / 4); i++) 612 bt->bt_cmap = 0; 613 } 614 615 if ((on != 0) && (sc->sc_blanked != 0)) { 616 /* Turn video back ON (unblank). */ 617 sc->sc_blanked = 0; 618 /* Restore normal colormap. */ 619 cg4b_ldcmap(sc); 620 } 621 } 622 623
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