cgfourteen.c revision 1.14
1 /* $NetBSD: cgfourteen.c,v 1.14 1998/11/19 15:38:24 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1996 5 * The President and Fellows of Harvard College. All rights reserved. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Harvard University. 16 * This product includes software developed by the University of 17 * California, Lawrence Berkeley Laboratory. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions 21 * are met: 22 * 1. Redistributions of source code must retain the above copyright 23 * notice, this list of conditions and the following disclaimer. 24 * 2. Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 3. All advertising materials mentioning features or use of this software 28 * must display the following acknowledgement: 29 * This product includes software developed by the University of 30 * California, Berkeley and its contributors. 31 * This product includes software developed by Harvard University and 32 * its contributors. 33 * 4. Neither the name of the University nor the names of its contributors 34 * may be used to endorse or promote products derived from this software 35 * without specific prior written permission. 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47 * SUCH DAMAGE. 48 * 49 * Based on: 50 * NetBSD: cgthree.c,v 1.28 1996/05/31 09:59:22 pk Exp 51 * NetBSD: cgsix.c,v 1.25 1996/04/01 17:30:00 christos Exp 52 */ 53 54 /* 55 * Driver for Campus-II on-board mbus-based video (cgfourteen). 56 * Provides minimum emulation of a Sun cgthree 8-bit framebuffer to 57 * allow X to run. 58 * 59 * Does not handle interrupts, even though they can occur. 60 * 61 * XXX should defer colormap updates to vertical retrace interrupts 62 */ 63 64 #include "opt_uvm.h" 65 66 /* 67 * The following is for debugging only; it opens up a security hole 68 * enabled by allowing any user to map the control registers for the 69 * cg14 into their space. 70 */ 71 #undef CG14_MAP_REGS 72 73 /* 74 * The following enables 24-bit operation: when opened, the framebuffer 75 * will switch to 24-bit mode (actually 32-bit mode), and provide a 76 * simple cg8 emulation. 77 * 78 * XXX Note that the code enabled by this define is currently untested/broken. 79 */ 80 #undef CG14_CG8 81 82 #include <sys/param.h> 83 #include <sys/systm.h> 84 #include <sys/buf.h> 85 #include <sys/device.h> 86 #include <sys/ioctl.h> 87 #include <sys/malloc.h> 88 #include <sys/mman.h> 89 #include <sys/tty.h> 90 #include <sys/conf.h> 91 92 #include <vm/vm.h> 93 94 #include <machine/fbio.h> 95 #include <machine/autoconf.h> 96 #include <machine/pmap.h> 97 #include <machine/fbvar.h> 98 #include <machine/cpu.h> 99 #include <machine/conf.h> 100 101 #include <sparc/dev/cgfourteenreg.h> 102 #include <sparc/dev/cgfourteenvar.h> 103 104 /* autoconfiguration driver */ 105 static void cgfourteenattach(struct device *, struct device *, void *); 106 static int cgfourteenmatch(struct device *, struct cfdata *, void *); 107 static void cgfourteenunblank(struct device *); 108 109 /* cdevsw prototypes */ 110 cdev_decl(cgfourteen); 111 112 struct cfattach cgfourteen_ca = { 113 sizeof(struct cgfourteen_softc), cgfourteenmatch, cgfourteenattach 114 }; 115 116 extern struct cfdriver cgfourteen_cd; 117 118 /* frame buffer generic driver */ 119 static struct fbdriver cgfourteenfbdriver = { 120 cgfourteenunblank, cgfourteenopen, cgfourteenclose, cgfourteenioctl, 121 cgfourteenpoll, cgfourteenmmap 122 }; 123 124 extern int fbnode; 125 extern struct tty *fbconstty; 126 127 static void cg14_set_video __P((struct cgfourteen_softc *, int)); 128 static int cg14_get_video __P((struct cgfourteen_softc *)); 129 static int cg14_get_cmap __P((struct fbcmap *, union cg14cmap *, int)); 130 static int cg14_put_cmap __P((struct fbcmap *, union cg14cmap *, int)); 131 static void cg14_load_hwcmap __P((struct cgfourteen_softc *, int, int)); 132 static void cg14_init __P((struct cgfourteen_softc *)); 133 static void cg14_reset __P((struct cgfourteen_softc *)); 134 static void cg14_loadomap __P((struct cgfourteen_softc *));/* cursor overlay */ 135 static void cg14_setcursor __P((struct cgfourteen_softc *));/* set position */ 136 static void cg14_loadcursor __P((struct cgfourteen_softc *));/* set shape */ 137 138 /* 139 * Match a cgfourteen. 140 */ 141 int 142 cgfourteenmatch(parent, cf, aux) 143 struct device *parent; 144 struct cfdata *cf; 145 void *aux; 146 { 147 union obio_attach_args *uoba = aux; 148 struct sbus_attach_args *sa = &uoba->uoba_sbus; 149 150 /* 151 * The cgfourteen is a local-bus video adaptor, accessed directly 152 * via the processor, and not through device space or an external 153 * bus. Thus we look _only_ at the obio bus. 154 * Additionally, these things exist only on the Sun4m. 155 */ 156 157 if (uoba->uoba_isobio4 != 0 || !CPU_ISSUN4M) 158 return (0); 159 160 /* Check driver name */ 161 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0); 162 } 163 164 /* 165 * Attach a display. We need to notice if it is the console, too. 166 */ 167 void 168 cgfourteenattach(parent, self, aux) 169 struct device *parent, *self; 170 void *aux; 171 { 172 union obio_attach_args *uoba = aux; 173 struct sbus_attach_args *sa = &uoba->uoba_sbus; 174 struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self; 175 struct fbdevice *fb = &sc->sc_fb; 176 bus_space_handle_t bh; 177 int node, ramsize; 178 u_int32_t *lut; 179 int i, isconsole; 180 181 node = sa->sa_node; 182 183 /* Remember cookies for cgfourteenmmap() */ 184 sc->sc_bustag = sa->sa_bustag; 185 186 fb->fb_driver = &cgfourteenfbdriver; 187 fb->fb_device = &sc->sc_dev; 188 /* Mask out invalid flags from the user. */ 189 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 190 191 /* 192 * We're emulating a cg3/8, so represent ourselves as one 193 */ 194 #ifdef CG14_CG8 195 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 196 fb->fb_type.fb_depth = 32; 197 #else 198 fb->fb_type.fb_type = FBTYPE_SUN3COLOR; 199 fb->fb_type.fb_depth = 8; 200 #endif 201 fb_setsize_obp(fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node); 202 203 ramsize = roundup(fb->fb_type.fb_height * fb->fb_linebytes, NBPG); 204 fb->fb_type.fb_cmsize = CG14_CLUT_SIZE; 205 fb->fb_type.fb_size = ramsize; 206 207 if (sa->sa_nreg < 2) { 208 printf("%s: only %d register sets\n", 209 self->dv_xname, sa->sa_nreg); 210 return; 211 } 212 bcopy(sa->sa_reg, sc->sc_physadr, 213 sa->sa_nreg * sizeof(struct sbus_reg)); 214 215 /* 216 * Now map in the 8 useful pages of registers 217 */ 218 if (sa->sa_size < 0x10000) { 219 #ifdef DIAGNOSTIC 220 printf("warning: can't find all cgfourteen registers...\n"); 221 #endif 222 sa->sa_size = 0x10000; 223 } 224 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 225 sa->sa_offset, 226 sa->sa_size, 227 BUS_SPACE_MAP_LINEAR, 228 0, &bh) != 0) { 229 printf("%s: cannot map control registers\n", self->dv_xname); 230 return; 231 } 232 233 sc->sc_ctl = (struct cg14ctl *) (bh); 234 sc->sc_hwc = (struct cg14curs *) (bh + CG14_OFFSET_CURS); 235 sc->sc_dac = (struct cg14dac *) (bh + CG14_OFFSET_DAC); 236 sc->sc_xlut = (struct cg14xlut *) (bh + CG14_OFFSET_XLUT); 237 sc->sc_clut1 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT1); 238 sc->sc_clut2 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT2); 239 sc->sc_clut3 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT3); 240 sc->sc_clutincr = (u_int *) (bh + CG14_OFFSET_CLUTINCR); 241 242 /* 243 * Let the user know that we're here 244 */ 245 #ifdef CG14_CG8 246 printf(": cgeight emulated at %dx%dx24bpp", 247 fb->fb_type.fb_width, fb->fb_type.fb_height); 248 #else 249 printf(": cgthree emulated at %dx%dx8bpp", 250 fb->fb_type.fb_width, fb->fb_type.fb_height); 251 #endif 252 /* 253 * Enable the video, but don't change the pixel depth. 254 */ 255 cg14_set_video(sc, 1); 256 257 /* 258 * Grab the initial colormap 259 */ 260 lut = (u_int32_t *) sc->sc_clut1->clut_lut; 261 for (i = 0; i < CG14_CLUT_SIZE; i++) 262 sc->sc_cmap.cm_chip[i] = lut[i]; 263 264 /* See if we're the console */ 265 isconsole = node == fbnode && fbconstty != NULL; 266 267 if (isconsole) { 268 printf(" (console)\n"); 269 #ifdef notdef 270 /* 271 * We don't use the raster console since the cg14 is 272 * fast enough already. 273 */ 274 #ifdef RASTERCONSOLE 275 fbrcons_init(fb); 276 #endif 277 #endif /* notdef */ 278 } else 279 printf("\n"); 280 281 /* Attach to /dev/fb */ 282 if (node == fbnode) 283 fb_attach(&sc->sc_fb, isconsole); 284 } 285 286 /* 287 * Keep track of the number of opens made. In the 24-bit driver, we need to 288 * switch to 24-bit mode on the first open, and switch back to 8-bit on 289 * the last close. This kind of nonsense is needed to give screenblank 290 * a fighting chance of working. 291 */ 292 static int cg14_opens = 0; 293 294 int 295 cgfourteenopen(dev, flags, mode, p) 296 dev_t dev; 297 int flags, mode; 298 struct proc *p; 299 { 300 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 301 int unit = minor(dev); 302 int s, oldopens; 303 304 if (unit >= cgfourteen_cd.cd_ndevs || 305 cgfourteen_cd.cd_devs[unit] == NULL) 306 return (ENXIO); 307 308 s = splhigh(); 309 oldopens = cg14_opens++; 310 splx(s); 311 312 /* Setup the cg14 as we want it, and save the original PROM state */ 313 if (oldopens == 0) /* first open only, to make screenblank work */ 314 cg14_init(sc); 315 316 return (0); 317 } 318 319 int 320 cgfourteenclose(dev, flags, mode, p) 321 dev_t dev; 322 int flags, mode; 323 struct proc *p; 324 { 325 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 326 int s, opens; 327 328 s = splhigh(); 329 opens = --cg14_opens; 330 if (cg14_opens < 0) 331 opens = cg14_opens = 0; 332 splx(s); 333 334 /* 335 * Restore video state to make the PROM happy, on last close. 336 */ 337 if (opens == 0) 338 cg14_reset(sc); 339 340 return (0); 341 } 342 343 int 344 cgfourteenioctl(dev, cmd, data, flags, p) 345 dev_t dev; 346 u_long cmd; 347 caddr_t data; 348 int flags; 349 struct proc *p; 350 { 351 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 352 struct fbgattr *fba; 353 union cg14cursor_cmap tcm; 354 int v, error; 355 u_int count; 356 357 switch (cmd) { 358 359 case FBIOGTYPE: 360 *(struct fbtype *)data = sc->sc_fb.fb_type; 361 break; 362 363 case FBIOGATTR: 364 fba = (struct fbgattr *)data; 365 fba->real_type = FBTYPE_MDICOLOR; 366 fba->owner = 0; /* XXX ??? */ 367 fba->fbtype = sc->sc_fb.fb_type; 368 fba->sattr.flags = 0; 369 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 370 fba->sattr.dev_specific[0] = -1; 371 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 372 fba->emu_types[1] = -1; 373 break; 374 375 case FBIOGETCMAP: 376 return (cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap, 377 CG14_CLUT_SIZE)); 378 379 case FBIOPUTCMAP: 380 /* copy to software map */ 381 #define p ((struct fbcmap *)data) 382 #ifdef CG14_CG8 383 p->index &= 0xffffff; 384 #endif 385 error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE); 386 if (error) 387 return (error); 388 /* now blast them into the chip */ 389 /* XXX should use retrace interrupt */ 390 cg14_load_hwcmap(sc, p->index, p->count); 391 #undef p 392 break; 393 394 case FBIOGVIDEO: 395 *(int *)data = cg14_get_video(sc); 396 break; 397 398 case FBIOSVIDEO: 399 cg14_set_video(sc, *(int *)data); 400 break; 401 402 /* these are for both FBIOSCURSOR and FBIOGCURSOR */ 403 #define p ((struct fbcursor *)data) 404 #define cc (&sc->sc_cursor) 405 case FBIOGCURSOR: 406 /* do not quite want everything here... */ 407 p->set = FB_CUR_SETALL; /* close enough, anyway */ 408 p->enable = cc->cc_enable; 409 p->pos = cc->cc_pos; 410 p->hot = cc->cc_hot; 411 p->size = cc->cc_size; 412 413 /* begin ugh ... can we lose some of this crap?? */ 414 if (p->image != NULL) { 415 count = cc->cc_size.y * 32 / NBBY; 416 error = copyout((caddr_t)cc->cc_cplane, 417 (caddr_t)p->image, count); 418 if (error) 419 return (error); 420 error = copyout((caddr_t)cc->cc_eplane, 421 (caddr_t)p->mask, count); 422 if (error) 423 return (error); 424 } 425 if (p->cmap.red != NULL) { 426 error = cg14_get_cmap(&p->cmap, 427 (union cg14cmap *)&cc->cc_color, 2); 428 if (error) 429 return (error); 430 } else { 431 p->cmap.index = 0; 432 p->cmap.count = 2; 433 } 434 /* end ugh */ 435 break; 436 437 case FBIOSCURSOR: 438 /* 439 * For setcmap and setshape, verify parameters, so that 440 * we do not get halfway through an update and then crap 441 * out with the software state screwed up. 442 */ 443 v = p->set; 444 if (v & FB_CUR_SETCMAP) { 445 /* 446 * This use of a temporary copy of the cursor 447 * colormap is not terribly efficient, but these 448 * copies are small (8 bytes)... 449 */ 450 tcm = cc->cc_color; 451 error = cg14_put_cmap(&p->cmap, (union cg14cmap *)&tcm, 452 2); 453 if (error) 454 return (error); 455 } 456 if (v & FB_CUR_SETSHAPE) { 457 if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32) 458 return (EINVAL); 459 count = p->size.y * 32 / NBBY; 460 #if defined(UVM) 461 if (!uvm_useracc(p->image, count, B_READ) || 462 !uvm_useracc(p->mask, count, B_READ)) 463 return (EFAULT); 464 #else 465 if (!useracc(p->image, count, B_READ) || 466 !useracc(p->mask, count, B_READ)) 467 return (EFAULT); 468 #endif 469 } 470 471 /* parameters are OK; do it */ 472 if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) { 473 if (v & FB_CUR_SETCUR) 474 cc->cc_enable = p->enable; 475 if (v & FB_CUR_SETPOS) 476 cc->cc_pos = p->pos; 477 if (v & FB_CUR_SETHOT) 478 cc->cc_hot = p->hot; 479 cg14_setcursor(sc); 480 } 481 if (v & FB_CUR_SETCMAP) { 482 cc->cc_color = tcm; 483 cg14_loadomap(sc); /* XXX defer to vertical retrace */ 484 } 485 if (v & FB_CUR_SETSHAPE) { 486 cc->cc_size = p->size; 487 count = p->size.y * 32 / NBBY; 488 bzero((caddr_t)cc->cc_eplane, sizeof cc->cc_eplane); 489 bzero((caddr_t)cc->cc_cplane, sizeof cc->cc_cplane); 490 bcopy(p->mask, (caddr_t)cc->cc_eplane, count); 491 bcopy(p->image, (caddr_t)cc->cc_cplane, count); 492 cg14_loadcursor(sc); 493 } 494 break; 495 496 #undef cc 497 #undef p 498 case FBIOGCURPOS: 499 *(struct fbcurpos *)data = sc->sc_cursor.cc_pos; 500 break; 501 502 case FBIOSCURPOS: 503 sc->sc_cursor.cc_pos = *(struct fbcurpos *)data; 504 cg14_setcursor(sc); 505 break; 506 507 case FBIOGCURMAX: 508 /* max cursor size is 32x32 */ 509 ((struct fbcurpos *)data)->x = 32; 510 ((struct fbcurpos *)data)->y = 32; 511 break; 512 513 default: 514 return (ENOTTY); 515 } 516 return (0); 517 } 518 519 /* 520 * Undo the effect of an FBIOSVIDEO that turns the video off. 521 */ 522 static void 523 cgfourteenunblank(dev) 524 struct device *dev; 525 { 526 527 cg14_set_video((struct cgfourteen_softc *)dev, 1); 528 } 529 530 /* 531 * Return the address that would map the given device at the given 532 * offset, allowing for the given protection, or return -1 for error. 533 * 534 * The cg14 frame buffer can be mapped in either 8-bit or 32-bit mode 535 * starting at the address stored in the PROM. In 8-bit mode, the X 536 * channel is not present, and can be ignored. In 32-bit mode, mapping 537 * at 0K delivers a 32-bpp buffer where the upper 8 bits select the X 538 * channel information. We hardwire the Xlut to all zeroes to insure 539 * that, regardless of this value, direct 24-bit color access will be 540 * used. 541 * 542 * Alternatively, mapping the frame buffer at an offset of 16M seems to 543 * tell the chip to ignore the X channel. XXX where does it get the X value 544 * to use? 545 */ 546 int 547 cgfourteenmmap(dev, off, prot) 548 dev_t dev; 549 int off, prot; 550 { 551 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 552 bus_space_handle_t bh; 553 554 #define CG3START (128*1024 + 128*1024) 555 #define CG8START (256*1024) 556 #define NOOVERLAY (0x04000000) 557 558 if (off & PGOFSET) 559 panic("cgfourteenmmap"); 560 561 if (off < 0) 562 return (-1); 563 564 #if defined(DEBUG) && defined(CG14_MAP_REGS) /* XXX: security hole */ 565 /* 566 * Map the control registers into user space. Should only be 567 * used for debugging! 568 */ 569 if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) { 570 off -= 0x10000000; 571 if (bus_space_mmap(sc->sc_bustag, 572 sc->sc_physadr[CG14_CTL_IDX].sbr_slot, 573 sc->sc_physadr[CG14_CTL_IDX].sbr_offset+off, 574 BUS_SPACE_MAP_LINEAR, &bh)) 575 return (-1); 576 577 return ((int)bh); 578 } 579 #endif 580 581 if ((u_int)off >= NOOVERLAY) 582 off -= NOOVERLAY; 583 #ifdef CG14_CG8 584 else if ((u_int)off >= CG8START) { 585 off -= CG8START; 586 } 587 #else 588 else if ((u_int)off >= CG3START) 589 off -= CG3START; 590 #endif 591 else 592 off = 0; 593 594 if ((unsigned)off >= sc->sc_fb.fb_type.fb_size * 595 sc->sc_fb.fb_type.fb_depth/8) { 596 #ifdef DEBUG 597 printf("\nmmap request out of bounds: request 0x%x, " 598 "bound 0x%x\n", (unsigned) off, 599 (unsigned)sc->sc_fb.fb_type.fb_size); 600 #endif 601 return (-1); 602 } 603 604 if (bus_space_mmap(sc->sc_bustag, 605 sc->sc_physadr[CG14_PXL_IDX].sbr_slot, 606 sc->sc_physadr[CG14_PXL_IDX].sbr_offset + off, 607 BUS_SPACE_MAP_LINEAR, &bh)) 608 return (-1); 609 610 return ((int)bh); 611 } 612 613 int 614 cgfourteenpoll(dev, events, p) 615 dev_t dev; 616 int events; 617 struct proc *p; 618 { 619 620 return (seltrue(dev, events, p)); 621 } 622 623 /* 624 * Miscellaneous helper functions 625 */ 626 627 /* Initialize the framebuffer, storing away useful state for later reset */ 628 static void 629 cg14_init(sc) 630 struct cgfourteen_softc *sc; 631 { 632 u_int32_t *clut; 633 u_int8_t *xlut; 634 int i; 635 636 /* 637 * We stash away the following to restore on close: 638 * 639 * color look-up table 1 (sc->sc_saveclut) 640 * x look-up table (sc->sc_savexlut) 641 * control register (sc->sc_savectl) 642 * cursor control register (sc->sc_savehwc) 643 */ 644 sc->sc_savectl = sc->sc_ctl->ctl_mctl; 645 sc->sc_savehwc = sc->sc_hwc->curs_ctl; 646 647 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 648 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 649 for (i = 0; i < CG14_CLUT_SIZE; i++) { 650 sc->sc_saveclut.cm_chip[i] = clut[i]; 651 sc->sc_savexlut[i] = xlut[i]; 652 } 653 654 #ifdef CG14_CG8 655 /* 656 * Enable the video, and put in 24 bit mode. 657 */ 658 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | 659 CG14_MCTL_POWERCTL; 660 661 /* 662 * Zero the xlut to enable direct-color mode 663 */ 664 bzero(sc->sc_xlut, CG14_CLUT_SIZE); 665 #else 666 /* 667 * Enable the video and put it in 8 bit mode 668 */ 669 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 | 670 CG14_MCTL_POWERCTL; 671 #endif 672 } 673 674 static void 675 cg14_reset(sc) /* Restore the state saved on cg14_init */ 676 struct cgfourteen_softc *sc; 677 { 678 u_int32_t *clut; 679 u_int8_t *xlut; 680 int i; 681 682 /* 683 * We restore the following, saved in cg14_init: 684 * 685 * color look-up table 1 (sc->sc_saveclut) 686 * x look-up table (sc->sc_savexlut) 687 * control register (sc->sc_savectl) 688 * cursor control register (sc->sc_savehwc) 689 * 690 * Note that we don't touch the video enable bits in the 691 * control register; otherwise, screenblank wouldn't work. 692 */ 693 sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID | 694 CG14_MCTL_POWERCTL)) | 695 (sc->sc_savectl & ~(CG14_MCTL_ENABLEVID | 696 CG14_MCTL_POWERCTL)); 697 sc->sc_hwc->curs_ctl = sc->sc_savehwc; 698 699 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 700 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 701 for (i = 0; i < CG14_CLUT_SIZE; i++) { 702 clut[i] = sc->sc_saveclut.cm_chip[i]; 703 xlut[i] = sc->sc_savexlut[i]; 704 } 705 } 706 707 /* Enable/disable video display; power down monitor if DPMS-capable */ 708 static void 709 cg14_set_video(sc, enable) 710 struct cgfourteen_softc *sc; 711 int enable; 712 { 713 /* 714 * We can only use DPMS to power down the display if the chip revision 715 * is greater than 0. 716 */ 717 if (enable) { 718 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 719 sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID | 720 CG14_MCTL_POWERCTL); 721 else 722 sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID; 723 } else { 724 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 725 sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID | 726 CG14_MCTL_POWERCTL); 727 else 728 sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID; 729 } 730 } 731 732 /* Get status of video display */ 733 static int 734 cg14_get_video(sc) 735 struct cgfourteen_softc *sc; 736 { 737 return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0); 738 } 739 740 /* Read the software shadow colormap */ 741 static int 742 cg14_get_cmap(p, cm, cmsize) 743 struct fbcmap *p; 744 union cg14cmap *cm; 745 int cmsize; 746 { 747 u_int i, start, count; 748 u_char *cp; 749 750 start = p->index; 751 count = p->count; 752 if (start >= cmsize || start + count > cmsize) 753 #ifdef DEBUG 754 { 755 printf("putcmaperror: start %d cmsize %d count %d\n", 756 start,cmsize,count); 757 #endif 758 return (EINVAL); 759 #ifdef DEBUG 760 } 761 #endif 762 763 #if defined(UVM) 764 if (!uvm_useracc(p->red, count, B_WRITE) || 765 !uvm_useracc(p->green, count, B_WRITE) || 766 !uvm_useracc(p->blue, count, B_WRITE)) 767 return (EFAULT); 768 #else 769 if (!useracc(p->red, count, B_WRITE) || 770 !useracc(p->green, count, B_WRITE) || 771 !useracc(p->blue, count, B_WRITE)) 772 return (EFAULT); 773 #endif 774 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 775 p->red[i] = cp[3]; 776 p->green[i] = cp[2]; 777 p->blue[i] = cp[1]; 778 } 779 return (0); 780 } 781 782 /* Write the software shadow colormap */ 783 static int 784 cg14_put_cmap(p, cm, cmsize) 785 struct fbcmap *p; 786 union cg14cmap *cm; 787 int cmsize; 788 { 789 u_int i, start, count; 790 u_char *cp; 791 792 start = p->index; 793 count = p->count; 794 if (start >= cmsize || start + count > cmsize) 795 #ifdef DEBUG 796 { 797 printf("putcmaperror: start %d cmsize %d count %d\n", 798 start,cmsize,count); 799 #endif 800 return (EINVAL); 801 #ifdef DEBUG 802 } 803 #endif 804 805 #if defined(UVM) 806 if (!uvm_useracc(p->red, count, B_READ) || 807 !uvm_useracc(p->green, count, B_READ) || 808 !uvm_useracc(p->blue, count, B_READ)) 809 return (EFAULT); 810 #else 811 if (!useracc(p->red, count, B_READ) || 812 !useracc(p->green, count, B_READ) || 813 !useracc(p->blue, count, B_READ)) 814 return (EFAULT); 815 #endif 816 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 817 cp[3] = p->red[i]; 818 cp[2] = p->green[i]; 819 cp[1] = p->blue[i]; 820 cp[0] = 0; /* no alpha channel */ 821 } 822 return (0); 823 } 824 825 static void 826 cg14_load_hwcmap(sc, start, ncolors) 827 struct cgfourteen_softc *sc; 828 int start, ncolors; 829 { 830 /* XXX switch to auto-increment, and on retrace intr */ 831 832 /* Setup pointers to source and dest */ 833 u_int32_t *colp = &sc->sc_cmap.cm_chip[start]; 834 volatile u_int32_t *lutp = &sc->sc_clut1->clut_lut[start]; 835 836 /* Copy by words */ 837 while (--ncolors >= 0) 838 *lutp++ = *colp++; 839 } 840 841 /* 842 * Load the cursor (overlay `foreground' and `background') colors. 843 */ 844 static void 845 cg14_setcursor(sc) 846 struct cgfourteen_softc *sc; 847 { 848 /* we need to subtract the hot-spot value here */ 849 #define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f) 850 851 sc->sc_hwc->curs_ctl = (sc->sc_cursor.cc_enable ? CG14_CURS_ENABLE : 0); 852 sc->sc_hwc->curs_x = COORD(x); 853 sc->sc_hwc->curs_y = COORD(y); 854 855 #undef COORD 856 } 857 858 static void 859 cg14_loadcursor(sc) 860 struct cgfourteen_softc *sc; 861 { 862 volatile struct cg14curs *hwc; 863 u_int edgemask, m; 864 int i; 865 866 /* 867 * Keep the top size.x bits. Here we *throw out* the top 868 * size.x bits from an all-one-bits word, introducing zeros in 869 * the top size.x bits, then invert all the bits to get what 870 * we really wanted as our mask. But this fails if size.x is 871 * 32---a sparc uses only the low 5 bits of the shift count--- 872 * so we have to special case that. 873 */ 874 edgemask = ~0; 875 if (sc->sc_cursor.cc_size.x < 32) 876 edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x); 877 hwc = sc->sc_hwc; 878 for (i = 0; i < 32; i++) { 879 m = sc->sc_cursor.cc_eplane[i] & edgemask; 880 hwc->curs_plane0[i] = m; 881 hwc->curs_plane1[i] = m & sc->sc_cursor.cc_cplane[i]; 882 } 883 } 884 885 static void 886 cg14_loadomap(sc) 887 struct cgfourteen_softc *sc; 888 { 889 /* set background color */ 890 sc->sc_hwc->curs_color1 = sc->sc_cursor.cc_color.cm_chip[0]; 891 /* set foreground color */ 892 sc->sc_hwc->curs_color2 = sc->sc_cursor.cc_color.cm_chip[1]; 893 } 894
Indexes created Sat Sep 27 22:09:54 GMT 2025