cgfourteen.c revision 1.20.4.1
1 /* $NetBSD: cgfourteen.c,v 1.20.4.1 2002/01/10 19:48:44 thorpej 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 /* 65 * The following is for debugging only; it opens up a security hole 66 * enabled by allowing any user to map the control registers for the 67 * cg14 into their space. 68 */ 69 #undef CG14_MAP_REGS 70 71 /* 72 * The following enables 24-bit operation: when opened, the framebuffer 73 * will switch to 24-bit mode (actually 32-bit mode), and provide a 74 * simple cg8 emulation. 75 * 76 * XXX Note that the code enabled by this define is currently untested/broken. 77 */ 78 #undef CG14_CG8 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/buf.h> 83 #include <sys/device.h> 84 #include <sys/ioctl.h> 85 #include <sys/malloc.h> 86 #include <sys/mman.h> 87 #include <sys/tty.h> 88 #include <sys/conf.h> 89 90 #include <uvm/uvm_extern.h> 91 92 #include <machine/bus.h> 93 #include <machine/autoconf.h> 94 #include <machine/conf.h> 95 96 #include <dev/sbus/sbusvar.h> 97 98 #include <dev/sun/fbio.h> 99 #include <dev/sun/fbvar.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 static void cg14_set_video __P((struct cgfourteen_softc *, int)); 125 static int cg14_get_video __P((struct cgfourteen_softc *)); 126 static int cg14_get_cmap __P((struct fbcmap *, union cg14cmap *, int)); 127 static int cg14_put_cmap __P((struct fbcmap *, union cg14cmap *, int)); 128 static void cg14_load_hwcmap __P((struct cgfourteen_softc *, int, int)); 129 static void cg14_init __P((struct cgfourteen_softc *)); 130 static void cg14_reset __P((struct cgfourteen_softc *)); 131 static void cg14_loadomap __P((struct cgfourteen_softc *));/* cursor overlay */ 132 static void cg14_setcursor __P((struct cgfourteen_softc *));/* set position */ 133 static void cg14_loadcursor __P((struct cgfourteen_softc *));/* set shape */ 134 135 /* 136 * Match a cgfourteen. 137 */ 138 int 139 cgfourteenmatch(parent, cf, aux) 140 struct device *parent; 141 struct cfdata *cf; 142 void *aux; 143 { 144 union obio_attach_args *uoba = aux; 145 struct sbus_attach_args *sa = &uoba->uoba_sbus; 146 147 /* 148 * The cgfourteen is a local-bus video adaptor, accessed directly 149 * via the processor, and not through device space or an external 150 * bus. Thus we look _only_ at the obio bus. 151 * Additionally, these things exist only on the Sun4m. 152 */ 153 154 if (uoba->uoba_isobio4 != 0 || !CPU_ISSUN4M) 155 return (0); 156 157 /* Check driver name */ 158 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0); 159 } 160 161 /* 162 * Attach a display. We need to notice if it is the console, too. 163 */ 164 void 165 cgfourteenattach(parent, self, aux) 166 struct device *parent, *self; 167 void *aux; 168 { 169 union obio_attach_args *uoba = aux; 170 struct sbus_attach_args *sa = &uoba->uoba_sbus; 171 struct cgfourteen_softc *sc = (struct cgfourteen_softc *)self; 172 struct fbdevice *fb = &sc->sc_fb; 173 bus_space_handle_t bh; 174 int node, ramsize; 175 u_int32_t *lut; 176 int i, isconsole; 177 178 node = sa->sa_node; 179 180 /* Remember cookies for cgfourteenmmap() */ 181 sc->sc_bustag = sa->sa_bustag; 182 183 fb->fb_driver = &cgfourteenfbdriver; 184 fb->fb_device = &sc->sc_dev; 185 /* Mask out invalid flags from the user. */ 186 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 187 188 /* 189 * We're emulating a cg3/8, so represent ourselves as one 190 */ 191 #ifdef CG14_CG8 192 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 193 fb->fb_type.fb_depth = 32; 194 #else 195 fb->fb_type.fb_type = FBTYPE_SUN3COLOR; 196 fb->fb_type.fb_depth = 8; 197 #endif 198 fb_setsize_obp(fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node); 199 200 ramsize = roundup(fb->fb_type.fb_height * fb->fb_linebytes, NBPG); 201 fb->fb_type.fb_cmsize = CG14_CLUT_SIZE; 202 fb->fb_type.fb_size = ramsize; 203 204 if (sa->sa_nreg < 2) { 205 printf("%s: only %d register sets\n", 206 self->dv_xname, sa->sa_nreg); 207 return; 208 } 209 bcopy(sa->sa_reg, sc->sc_physadr, 210 sa->sa_nreg * sizeof(struct sbus_reg)); 211 212 /* 213 * Now map in the 8 useful pages of registers 214 */ 215 if (sa->sa_size < 0x10000) { 216 #ifdef DIAGNOSTIC 217 printf("warning: can't find all cgfourteen registers...\n"); 218 #endif 219 sa->sa_size = 0x10000; 220 } 221 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 222 sa->sa_offset, 223 sa->sa_size, 224 BUS_SPACE_MAP_LINEAR, 225 0, &bh) != 0) { 226 printf("%s: cannot map control registers\n", self->dv_xname); 227 return; 228 } 229 230 sc->sc_ctl = (struct cg14ctl *) (bh); 231 sc->sc_hwc = (struct cg14curs *) (bh + CG14_OFFSET_CURS); 232 sc->sc_dac = (struct cg14dac *) (bh + CG14_OFFSET_DAC); 233 sc->sc_xlut = (struct cg14xlut *) (bh + CG14_OFFSET_XLUT); 234 sc->sc_clut1 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT1); 235 sc->sc_clut2 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT2); 236 sc->sc_clut3 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT3); 237 sc->sc_clutincr = (u_int *) (bh + CG14_OFFSET_CLUTINCR); 238 239 /* 240 * Let the user know that we're here 241 */ 242 #ifdef CG14_CG8 243 printf(": cgeight emulated at %dx%dx24bpp", 244 fb->fb_type.fb_width, fb->fb_type.fb_height); 245 #else 246 printf(": cgthree emulated at %dx%dx8bpp", 247 fb->fb_type.fb_width, fb->fb_type.fb_height); 248 #endif 249 /* 250 * Enable the video, but don't change the pixel depth. 251 */ 252 cg14_set_video(sc, 1); 253 254 /* 255 * Grab the initial colormap 256 */ 257 lut = (u_int32_t *) sc->sc_clut1->clut_lut; 258 for (i = 0; i < CG14_CLUT_SIZE; i++) 259 sc->sc_cmap.cm_chip[i] = lut[i]; 260 261 /* See if we're the console */ 262 isconsole = fb_is_console(node); 263 264 if (isconsole) { 265 printf(" (console)\n"); 266 #ifdef notdef 267 /* 268 * We don't use the raster console since the cg14 is 269 * fast enough already. 270 */ 271 #ifdef RASTERCONSOLE 272 fbrcons_init(fb); 273 #endif 274 #endif /* notdef */ 275 } else 276 printf("\n"); 277 278 /* Attach to /dev/fb */ 279 fb_attach(&sc->sc_fb, isconsole); 280 } 281 282 /* 283 * Keep track of the number of opens made. In the 24-bit driver, we need to 284 * switch to 24-bit mode on the first open, and switch back to 8-bit on 285 * the last close. This kind of nonsense is needed to give screenblank 286 * a fighting chance of working. 287 */ 288 static int cg14_opens = 0; 289 290 int 291 cgfourteenopen(dev, flags, mode, p) 292 dev_t dev; 293 int flags, mode; 294 struct proc *p; 295 { 296 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 297 int unit = minor(dev); 298 int s, oldopens; 299 300 if (unit >= cgfourteen_cd.cd_ndevs || 301 cgfourteen_cd.cd_devs[unit] == NULL) 302 return (ENXIO); 303 304 s = splhigh(); 305 oldopens = cg14_opens++; 306 splx(s); 307 308 /* Setup the cg14 as we want it, and save the original PROM state */ 309 if (oldopens == 0) /* first open only, to make screenblank work */ 310 cg14_init(sc); 311 312 return (0); 313 } 314 315 int 316 cgfourteenclose(dev, flags, mode, p) 317 dev_t dev; 318 int flags, mode; 319 struct proc *p; 320 { 321 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 322 int s, opens; 323 324 s = splhigh(); 325 opens = --cg14_opens; 326 if (cg14_opens < 0) 327 opens = cg14_opens = 0; 328 splx(s); 329 330 /* 331 * Restore video state to make the PROM happy, on last close. 332 */ 333 if (opens == 0) 334 cg14_reset(sc); 335 336 return (0); 337 } 338 339 int 340 cgfourteenioctl(dev, cmd, data, flags, p) 341 dev_t dev; 342 u_long cmd; 343 caddr_t data; 344 int flags; 345 struct proc *p; 346 { 347 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 348 struct fbgattr *fba; 349 union cg14cursor_cmap tcm; 350 int v, error; 351 u_int count; 352 353 switch (cmd) { 354 355 case FBIOGTYPE: 356 *(struct fbtype *)data = sc->sc_fb.fb_type; 357 break; 358 359 case FBIOGATTR: 360 fba = (struct fbgattr *)data; 361 fba->real_type = FBTYPE_MDICOLOR; 362 fba->owner = 0; /* XXX ??? */ 363 fba->fbtype = sc->sc_fb.fb_type; 364 fba->sattr.flags = 0; 365 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 366 fba->sattr.dev_specific[0] = -1; 367 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 368 fba->emu_types[1] = -1; 369 break; 370 371 case FBIOGETCMAP: 372 return (cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap, 373 CG14_CLUT_SIZE)); 374 375 case FBIOPUTCMAP: 376 /* copy to software map */ 377 #define p ((struct fbcmap *)data) 378 #ifdef CG14_CG8 379 p->index &= 0xffffff; 380 #endif 381 error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE); 382 if (error) 383 return (error); 384 /* now blast them into the chip */ 385 /* XXX should use retrace interrupt */ 386 cg14_load_hwcmap(sc, p->index, p->count); 387 #undef p 388 break; 389 390 case FBIOGVIDEO: 391 *(int *)data = cg14_get_video(sc); 392 break; 393 394 case FBIOSVIDEO: 395 cg14_set_video(sc, *(int *)data); 396 break; 397 398 /* these are for both FBIOSCURSOR and FBIOGCURSOR */ 399 #define p ((struct fbcursor *)data) 400 #define cc (&sc->sc_cursor) 401 case FBIOGCURSOR: 402 /* do not quite want everything here... */ 403 p->set = FB_CUR_SETALL; /* close enough, anyway */ 404 p->enable = cc->cc_enable; 405 p->pos = cc->cc_pos; 406 p->hot = cc->cc_hot; 407 p->size = cc->cc_size; 408 409 /* begin ugh ... can we lose some of this crap?? */ 410 if (p->image != NULL) { 411 count = cc->cc_size.y * 32 / NBBY; 412 error = copyout((caddr_t)cc->cc_cplane, 413 (caddr_t)p->image, count); 414 if (error) 415 return (error); 416 error = copyout((caddr_t)cc->cc_eplane, 417 (caddr_t)p->mask, count); 418 if (error) 419 return (error); 420 } 421 if (p->cmap.red != NULL) { 422 error = cg14_get_cmap(&p->cmap, 423 (union cg14cmap *)&cc->cc_color, 2); 424 if (error) 425 return (error); 426 } else { 427 p->cmap.index = 0; 428 p->cmap.count = 2; 429 } 430 /* end ugh */ 431 break; 432 433 case FBIOSCURSOR: 434 /* 435 * For setcmap and setshape, verify parameters, so that 436 * we do not get halfway through an update and then crap 437 * out with the software state screwed up. 438 */ 439 v = p->set; 440 if (v & FB_CUR_SETCMAP) { 441 /* 442 * This use of a temporary copy of the cursor 443 * colormap is not terribly efficient, but these 444 * copies are small (8 bytes)... 445 */ 446 tcm = cc->cc_color; 447 error = cg14_put_cmap(&p->cmap, (union cg14cmap *)&tcm, 448 2); 449 if (error) 450 return (error); 451 } 452 if (v & FB_CUR_SETSHAPE) { 453 if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32) 454 return (EINVAL); 455 count = p->size.y * 32 / NBBY; 456 if (!uvm_useracc(p->image, count, B_READ) || 457 !uvm_useracc(p->mask, count, B_READ)) 458 return (EFAULT); 459 } 460 461 /* parameters are OK; do it */ 462 if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) { 463 if (v & FB_CUR_SETCUR) 464 cc->cc_enable = p->enable; 465 if (v & FB_CUR_SETPOS) 466 cc->cc_pos = p->pos; 467 if (v & FB_CUR_SETHOT) 468 cc->cc_hot = p->hot; 469 cg14_setcursor(sc); 470 } 471 if (v & FB_CUR_SETCMAP) { 472 cc->cc_color = tcm; 473 cg14_loadomap(sc); /* XXX defer to vertical retrace */ 474 } 475 if (v & FB_CUR_SETSHAPE) { 476 cc->cc_size = p->size; 477 count = p->size.y * 32 / NBBY; 478 bzero((caddr_t)cc->cc_eplane, sizeof cc->cc_eplane); 479 bzero((caddr_t)cc->cc_cplane, sizeof cc->cc_cplane); 480 bcopy(p->mask, (caddr_t)cc->cc_eplane, count); 481 bcopy(p->image, (caddr_t)cc->cc_cplane, count); 482 cg14_loadcursor(sc); 483 } 484 break; 485 486 #undef cc 487 #undef p 488 case FBIOGCURPOS: 489 *(struct fbcurpos *)data = sc->sc_cursor.cc_pos; 490 break; 491 492 case FBIOSCURPOS: 493 sc->sc_cursor.cc_pos = *(struct fbcurpos *)data; 494 cg14_setcursor(sc); 495 break; 496 497 case FBIOGCURMAX: 498 /* max cursor size is 32x32 */ 499 ((struct fbcurpos *)data)->x = 32; 500 ((struct fbcurpos *)data)->y = 32; 501 break; 502 503 default: 504 return (ENOTTY); 505 } 506 return (0); 507 } 508 509 /* 510 * Undo the effect of an FBIOSVIDEO that turns the video off. 511 */ 512 static void 513 cgfourteenunblank(dev) 514 struct device *dev; 515 { 516 517 cg14_set_video((struct cgfourteen_softc *)dev, 1); 518 } 519 520 /* 521 * Return the address that would map the given device at the given 522 * offset, allowing for the given protection, or return -1 for error. 523 * 524 * The cg14 frame buffer can be mapped in either 8-bit or 32-bit mode 525 * starting at the address stored in the PROM. In 8-bit mode, the X 526 * channel is not present, and can be ignored. In 32-bit mode, mapping 527 * at 0K delivers a 32-bpp buffer where the upper 8 bits select the X 528 * channel information. We hardwire the Xlut to all zeroes to insure 529 * that, regardless of this value, direct 24-bit color access will be 530 * used. 531 * 532 * Alternatively, mapping the frame buffer at an offset of 16M seems to 533 * tell the chip to ignore the X channel. XXX where does it get the X value 534 * to use? 535 */ 536 paddr_t 537 cgfourteenmmap(dev, off, prot) 538 dev_t dev; 539 off_t off; 540 int prot; 541 { 542 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 543 544 #define CG3START (128*1024 + 128*1024) 545 #define CG8START (256*1024) 546 #define NOOVERLAY (0x04000000) 547 548 if (off & PGOFSET) 549 panic("cgfourteenmmap"); 550 551 if (off < 0) 552 return (-1); 553 554 #if defined(DEBUG) && defined(CG14_MAP_REGS) /* XXX: security hole */ 555 /* 556 * Map the control registers into user space. Should only be 557 * used for debugging! 558 */ 559 if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) { 560 off -= 0x10000000; 561 if (bus_space_mmap(sc->sc_bustag, 562 BUS_ADDR(sc->sc_physadr[CG14_CTL_IDX].sbr_slot, 563 sc->sc_physadr[CG14_CTL_IDX].sbr_offset), 564 off, prot, BUS_SPACE_MAP_LINEAR)); 565 } 566 #endif 567 568 if ((u_int)off >= NOOVERLAY) 569 off -= NOOVERLAY; 570 #ifdef CG14_CG8 571 else if ((u_int)off >= CG8START) { 572 off -= CG8START; 573 } 574 #else 575 else if ((u_int)off >= CG3START) 576 off -= CG3START; 577 #endif 578 else 579 off = 0; 580 581 if (off >= sc->sc_fb.fb_type.fb_size * 582 sc->sc_fb.fb_type.fb_depth/8) { 583 #ifdef DEBUG 584 printf("\nmmap request out of bounds: request 0x%x, " 585 "bound 0x%x\n", (unsigned) off, 586 (unsigned)sc->sc_fb.fb_type.fb_size); 587 #endif 588 return (-1); 589 } 590 591 return (bus_space_mmap(sc->sc_bustag, 592 BUS_ADDR(sc->sc_physadr[CG14_PXL_IDX].sbr_slot, 593 sc->sc_physadr[CG14_PXL_IDX].sbr_offset), 594 off, prot, BUS_SPACE_MAP_LINEAR)); 595 } 596 597 int 598 cgfourteenpoll(dev, events, p) 599 dev_t dev; 600 int events; 601 struct proc *p; 602 { 603 604 return (seltrue(dev, events, p)); 605 } 606 607 /* 608 * Miscellaneous helper functions 609 */ 610 611 /* Initialize the framebuffer, storing away useful state for later reset */ 612 static void 613 cg14_init(sc) 614 struct cgfourteen_softc *sc; 615 { 616 u_int32_t *clut; 617 u_int8_t *xlut; 618 int i; 619 620 /* 621 * We stash away the following to restore on close: 622 * 623 * color look-up table 1 (sc->sc_saveclut) 624 * x look-up table (sc->sc_savexlut) 625 * control register (sc->sc_savectl) 626 * cursor control register (sc->sc_savehwc) 627 */ 628 sc->sc_savectl = sc->sc_ctl->ctl_mctl; 629 sc->sc_savehwc = sc->sc_hwc->curs_ctl; 630 631 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 632 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 633 for (i = 0; i < CG14_CLUT_SIZE; i++) { 634 sc->sc_saveclut.cm_chip[i] = clut[i]; 635 sc->sc_savexlut[i] = xlut[i]; 636 } 637 638 #ifdef CG14_CG8 639 /* 640 * Enable the video, and put in 24 bit mode. 641 */ 642 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | 643 CG14_MCTL_POWERCTL; 644 645 /* 646 * Zero the xlut to enable direct-color mode 647 */ 648 bzero(sc->sc_xlut, CG14_CLUT_SIZE); 649 #else 650 /* 651 * Enable the video and put it in 8 bit mode 652 */ 653 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 | 654 CG14_MCTL_POWERCTL; 655 #endif 656 } 657 658 static void 659 cg14_reset(sc) /* Restore the state saved on cg14_init */ 660 struct cgfourteen_softc *sc; 661 { 662 u_int32_t *clut; 663 u_int8_t *xlut; 664 int i; 665 666 /* 667 * We restore the following, saved in cg14_init: 668 * 669 * color look-up table 1 (sc->sc_saveclut) 670 * x look-up table (sc->sc_savexlut) 671 * control register (sc->sc_savectl) 672 * cursor control register (sc->sc_savehwc) 673 * 674 * Note that we don't touch the video enable bits in the 675 * control register; otherwise, screenblank wouldn't work. 676 */ 677 sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID | 678 CG14_MCTL_POWERCTL)) | 679 (sc->sc_savectl & ~(CG14_MCTL_ENABLEVID | 680 CG14_MCTL_POWERCTL)); 681 sc->sc_hwc->curs_ctl = sc->sc_savehwc; 682 683 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 684 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 685 for (i = 0; i < CG14_CLUT_SIZE; i++) { 686 clut[i] = sc->sc_saveclut.cm_chip[i]; 687 xlut[i] = sc->sc_savexlut[i]; 688 } 689 } 690 691 /* Enable/disable video display; power down monitor if DPMS-capable */ 692 static void 693 cg14_set_video(sc, enable) 694 struct cgfourteen_softc *sc; 695 int enable; 696 { 697 /* 698 * We can only use DPMS to power down the display if the chip revision 699 * is greater than 0. 700 */ 701 if (enable) { 702 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 703 sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID | 704 CG14_MCTL_POWERCTL); 705 else 706 sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID; 707 } else { 708 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 709 sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID | 710 CG14_MCTL_POWERCTL); 711 else 712 sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID; 713 } 714 } 715 716 /* Get status of video display */ 717 static int 718 cg14_get_video(sc) 719 struct cgfourteen_softc *sc; 720 { 721 return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0); 722 } 723 724 /* Read the software shadow colormap */ 725 static int 726 cg14_get_cmap(p, cm, cmsize) 727 struct fbcmap *p; 728 union cg14cmap *cm; 729 int cmsize; 730 { 731 u_int i, start, count; 732 u_char *cp; 733 734 start = p->index; 735 count = p->count; 736 if (start >= cmsize || start + count > cmsize) 737 #ifdef DEBUG 738 { 739 printf("putcmaperror: start %d cmsize %d count %d\n", 740 start,cmsize,count); 741 #endif 742 return (EINVAL); 743 #ifdef DEBUG 744 } 745 #endif 746 747 if (!uvm_useracc(p->red, count, B_WRITE) || 748 !uvm_useracc(p->green, count, B_WRITE) || 749 !uvm_useracc(p->blue, count, B_WRITE)) 750 return (EFAULT); 751 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 752 p->red[i] = cp[3]; 753 p->green[i] = cp[2]; 754 p->blue[i] = cp[1]; 755 } 756 return (0); 757 } 758 759 /* Write the software shadow colormap */ 760 static int 761 cg14_put_cmap(p, cm, cmsize) 762 struct fbcmap *p; 763 union cg14cmap *cm; 764 int cmsize; 765 { 766 u_int i, start, count; 767 u_char *cp; 768 769 start = p->index; 770 count = p->count; 771 if (start >= cmsize || start + count > cmsize) 772 #ifdef DEBUG 773 { 774 printf("putcmaperror: start %d cmsize %d count %d\n", 775 start,cmsize,count); 776 #endif 777 return (EINVAL); 778 #ifdef DEBUG 779 } 780 #endif 781 782 if (!uvm_useracc(p->red, count, B_READ) || 783 !uvm_useracc(p->green, count, B_READ) || 784 !uvm_useracc(p->blue, count, B_READ)) 785 return (EFAULT); 786 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 787 cp[3] = p->red[i]; 788 cp[2] = p->green[i]; 789 cp[1] = p->blue[i]; 790 cp[0] = 0; /* no alpha channel */ 791 } 792 return (0); 793 } 794 795 static void 796 cg14_load_hwcmap(sc, start, ncolors) 797 struct cgfourteen_softc *sc; 798 int start, ncolors; 799 { 800 /* XXX switch to auto-increment, and on retrace intr */ 801 802 /* Setup pointers to source and dest */ 803 u_int32_t *colp = &sc->sc_cmap.cm_chip[start]; 804 volatile u_int32_t *lutp = &sc->sc_clut1->clut_lut[start]; 805 806 /* Copy by words */ 807 while (--ncolors >= 0) 808 *lutp++ = *colp++; 809 } 810 811 /* 812 * Load the cursor (overlay `foreground' and `background') colors. 813 */ 814 static void 815 cg14_setcursor(sc) 816 struct cgfourteen_softc *sc; 817 { 818 /* we need to subtract the hot-spot value here */ 819 #define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f) 820 821 sc->sc_hwc->curs_ctl = (sc->sc_cursor.cc_enable ? CG14_CURS_ENABLE : 0); 822 sc->sc_hwc->curs_x = COORD(x); 823 sc->sc_hwc->curs_y = COORD(y); 824 825 #undef COORD 826 } 827 828 static void 829 cg14_loadcursor(sc) 830 struct cgfourteen_softc *sc; 831 { 832 volatile struct cg14curs *hwc; 833 u_int edgemask, m; 834 int i; 835 836 /* 837 * Keep the top size.x bits. Here we *throw out* the top 838 * size.x bits from an all-one-bits word, introducing zeros in 839 * the top size.x bits, then invert all the bits to get what 840 * we really wanted as our mask. But this fails if size.x is 841 * 32---a sparc uses only the low 5 bits of the shift count--- 842 * so we have to special case that. 843 */ 844 edgemask = ~0; 845 if (sc->sc_cursor.cc_size.x < 32) 846 edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x); 847 hwc = sc->sc_hwc; 848 for (i = 0; i < 32; i++) { 849 m = sc->sc_cursor.cc_eplane[i] & edgemask; 850 hwc->curs_plane0[i] = m; 851 hwc->curs_plane1[i] = m & sc->sc_cursor.cc_cplane[i]; 852 } 853 } 854 855 static void 856 cg14_loadomap(sc) 857 struct cgfourteen_softc *sc; 858 { 859 /* set background color */ 860 sc->sc_hwc->curs_color1 = sc->sc_cursor.cc_color.cm_chip[0]; 861 /* set foreground color */ 862 sc->sc_hwc->curs_color2 = sc->sc_cursor.cc_color.cm_chip[1]; 863 } 864
Indexes created Sun Oct 19 02:09:48 GMT 2025