cgfourteen.c revision 1.22
1 /* $NetBSD: cgfourteen.c,v 1.22 2002/03/11 16:27:01 pk 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, 222 sa->sa_slot, sa->sa_offset, sa->sa_size, 223 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 224 printf("%s: cannot map control registers\n", self->dv_xname); 225 return; 226 } 227 228 sc->sc_ctl = (struct cg14ctl *) (bh); 229 sc->sc_hwc = (struct cg14curs *) (bh + CG14_OFFSET_CURS); 230 sc->sc_dac = (struct cg14dac *) (bh + CG14_OFFSET_DAC); 231 sc->sc_xlut = (struct cg14xlut *) (bh + CG14_OFFSET_XLUT); 232 sc->sc_clut1 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT1); 233 sc->sc_clut2 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT2); 234 sc->sc_clut3 = (struct cg14clut *) (bh + CG14_OFFSET_CLUT3); 235 sc->sc_clutincr = (u_int *) (bh + CG14_OFFSET_CLUTINCR); 236 237 /* 238 * Let the user know that we're here 239 */ 240 #ifdef CG14_CG8 241 printf(": cgeight emulated at %dx%dx24bpp", 242 fb->fb_type.fb_width, fb->fb_type.fb_height); 243 #else 244 printf(": cgthree emulated at %dx%dx8bpp", 245 fb->fb_type.fb_width, fb->fb_type.fb_height); 246 #endif 247 /* 248 * Enable the video, but don't change the pixel depth. 249 */ 250 cg14_set_video(sc, 1); 251 252 /* 253 * Grab the initial colormap 254 */ 255 lut = (u_int32_t *) sc->sc_clut1->clut_lut; 256 for (i = 0; i < CG14_CLUT_SIZE; i++) 257 sc->sc_cmap.cm_chip[i] = lut[i]; 258 259 /* See if we're the console */ 260 isconsole = fb_is_console(node); 261 262 if (isconsole) { 263 printf(" (console)\n"); 264 #ifdef notdef 265 /* 266 * We don't use the raster console since the cg14 is 267 * fast enough already. 268 */ 269 #ifdef RASTERCONSOLE 270 fbrcons_init(fb); 271 #endif 272 #endif /* notdef */ 273 } else 274 printf("\n"); 275 276 /* Attach to /dev/fb */ 277 fb_attach(&sc->sc_fb, isconsole); 278 } 279 280 /* 281 * Keep track of the number of opens made. In the 24-bit driver, we need to 282 * switch to 24-bit mode on the first open, and switch back to 8-bit on 283 * the last close. This kind of nonsense is needed to give screenblank 284 * a fighting chance of working. 285 */ 286 static int cg14_opens = 0; 287 288 int 289 cgfourteenopen(dev, flags, mode, p) 290 dev_t dev; 291 int flags, mode; 292 struct proc *p; 293 { 294 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 295 int unit = minor(dev); 296 int s, oldopens; 297 298 if (unit >= cgfourteen_cd.cd_ndevs || 299 cgfourteen_cd.cd_devs[unit] == NULL) 300 return (ENXIO); 301 302 s = splhigh(); 303 oldopens = cg14_opens++; 304 splx(s); 305 306 /* Setup the cg14 as we want it, and save the original PROM state */ 307 if (oldopens == 0) /* first open only, to make screenblank work */ 308 cg14_init(sc); 309 310 return (0); 311 } 312 313 int 314 cgfourteenclose(dev, flags, mode, p) 315 dev_t dev; 316 int flags, mode; 317 struct proc *p; 318 { 319 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 320 int s, opens; 321 322 s = splhigh(); 323 opens = --cg14_opens; 324 if (cg14_opens < 0) 325 opens = cg14_opens = 0; 326 splx(s); 327 328 /* 329 * Restore video state to make the PROM happy, on last close. 330 */ 331 if (opens == 0) 332 cg14_reset(sc); 333 334 return (0); 335 } 336 337 int 338 cgfourteenioctl(dev, cmd, data, flags, p) 339 dev_t dev; 340 u_long cmd; 341 caddr_t data; 342 int flags; 343 struct proc *p; 344 { 345 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 346 struct fbgattr *fba; 347 union cg14cursor_cmap tcm; 348 int v, error; 349 u_int count; 350 351 switch (cmd) { 352 353 case FBIOGTYPE: 354 *(struct fbtype *)data = sc->sc_fb.fb_type; 355 break; 356 357 case FBIOGATTR: 358 fba = (struct fbgattr *)data; 359 fba->real_type = FBTYPE_MDICOLOR; 360 fba->owner = 0; /* XXX ??? */ 361 fba->fbtype = sc->sc_fb.fb_type; 362 fba->sattr.flags = 0; 363 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 364 fba->sattr.dev_specific[0] = -1; 365 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 366 fba->emu_types[1] = -1; 367 break; 368 369 case FBIOGETCMAP: 370 return (cg14_get_cmap((struct fbcmap *)data, &sc->sc_cmap, 371 CG14_CLUT_SIZE)); 372 373 case FBIOPUTCMAP: 374 /* copy to software map */ 375 #define p ((struct fbcmap *)data) 376 #ifdef CG14_CG8 377 p->index &= 0xffffff; 378 #endif 379 error = cg14_put_cmap(p, &sc->sc_cmap, CG14_CLUT_SIZE); 380 if (error) 381 return (error); 382 /* now blast them into the chip */ 383 /* XXX should use retrace interrupt */ 384 cg14_load_hwcmap(sc, p->index, p->count); 385 #undef p 386 break; 387 388 case FBIOGVIDEO: 389 *(int *)data = cg14_get_video(sc); 390 break; 391 392 case FBIOSVIDEO: 393 cg14_set_video(sc, *(int *)data); 394 break; 395 396 /* these are for both FBIOSCURSOR and FBIOGCURSOR */ 397 #define p ((struct fbcursor *)data) 398 #define cc (&sc->sc_cursor) 399 case FBIOGCURSOR: 400 /* do not quite want everything here... */ 401 p->set = FB_CUR_SETALL; /* close enough, anyway */ 402 p->enable = cc->cc_enable; 403 p->pos = cc->cc_pos; 404 p->hot = cc->cc_hot; 405 p->size = cc->cc_size; 406 407 /* begin ugh ... can we lose some of this crap?? */ 408 if (p->image != NULL) { 409 count = cc->cc_size.y * 32 / NBBY; 410 error = copyout((caddr_t)cc->cc_cplane, 411 (caddr_t)p->image, count); 412 if (error) 413 return (error); 414 error = copyout((caddr_t)cc->cc_eplane, 415 (caddr_t)p->mask, count); 416 if (error) 417 return (error); 418 } 419 if (p->cmap.red != NULL) { 420 error = cg14_get_cmap(&p->cmap, 421 (union cg14cmap *)&cc->cc_color, 2); 422 if (error) 423 return (error); 424 } else { 425 p->cmap.index = 0; 426 p->cmap.count = 2; 427 } 428 /* end ugh */ 429 break; 430 431 case FBIOSCURSOR: 432 /* 433 * For setcmap and setshape, verify parameters, so that 434 * we do not get halfway through an update and then crap 435 * out with the software state screwed up. 436 */ 437 v = p->set; 438 if (v & FB_CUR_SETCMAP) { 439 /* 440 * This use of a temporary copy of the cursor 441 * colormap is not terribly efficient, but these 442 * copies are small (8 bytes)... 443 */ 444 tcm = cc->cc_color; 445 error = cg14_put_cmap(&p->cmap, (union cg14cmap *)&tcm, 446 2); 447 if (error) 448 return (error); 449 } 450 if (v & FB_CUR_SETSHAPE) { 451 if ((u_int)p->size.x > 32 || (u_int)p->size.y > 32) 452 return (EINVAL); 453 count = p->size.y * 32 / NBBY; 454 if (!uvm_useracc(p->image, count, B_READ) || 455 !uvm_useracc(p->mask, count, B_READ)) 456 return (EFAULT); 457 } 458 459 /* parameters are OK; do it */ 460 if (v & (FB_CUR_SETCUR | FB_CUR_SETPOS | FB_CUR_SETHOT)) { 461 if (v & FB_CUR_SETCUR) 462 cc->cc_enable = p->enable; 463 if (v & FB_CUR_SETPOS) 464 cc->cc_pos = p->pos; 465 if (v & FB_CUR_SETHOT) 466 cc->cc_hot = p->hot; 467 cg14_setcursor(sc); 468 } 469 if (v & FB_CUR_SETCMAP) { 470 cc->cc_color = tcm; 471 cg14_loadomap(sc); /* XXX defer to vertical retrace */ 472 } 473 if (v & FB_CUR_SETSHAPE) { 474 cc->cc_size = p->size; 475 count = p->size.y * 32 / NBBY; 476 bzero((caddr_t)cc->cc_eplane, sizeof cc->cc_eplane); 477 bzero((caddr_t)cc->cc_cplane, sizeof cc->cc_cplane); 478 bcopy(p->mask, (caddr_t)cc->cc_eplane, count); 479 bcopy(p->image, (caddr_t)cc->cc_cplane, count); 480 cg14_loadcursor(sc); 481 } 482 break; 483 484 #undef cc 485 #undef p 486 case FBIOGCURPOS: 487 *(struct fbcurpos *)data = sc->sc_cursor.cc_pos; 488 break; 489 490 case FBIOSCURPOS: 491 sc->sc_cursor.cc_pos = *(struct fbcurpos *)data; 492 cg14_setcursor(sc); 493 break; 494 495 case FBIOGCURMAX: 496 /* max cursor size is 32x32 */ 497 ((struct fbcurpos *)data)->x = 32; 498 ((struct fbcurpos *)data)->y = 32; 499 break; 500 501 default: 502 return (ENOTTY); 503 } 504 return (0); 505 } 506 507 /* 508 * Undo the effect of an FBIOSVIDEO that turns the video off. 509 */ 510 static void 511 cgfourteenunblank(dev) 512 struct device *dev; 513 { 514 515 cg14_set_video((struct cgfourteen_softc *)dev, 1); 516 } 517 518 /* 519 * Return the address that would map the given device at the given 520 * offset, allowing for the given protection, or return -1 for error. 521 * 522 * The cg14 frame buffer can be mapped in either 8-bit or 32-bit mode 523 * starting at the address stored in the PROM. In 8-bit mode, the X 524 * channel is not present, and can be ignored. In 32-bit mode, mapping 525 * at 0K delivers a 32-bpp buffer where the upper 8 bits select the X 526 * channel information. We hardwire the Xlut to all zeroes to insure 527 * that, regardless of this value, direct 24-bit color access will be 528 * used. 529 * 530 * Alternatively, mapping the frame buffer at an offset of 16M seems to 531 * tell the chip to ignore the X channel. XXX where does it get the X value 532 * to use? 533 */ 534 paddr_t 535 cgfourteenmmap(dev, off, prot) 536 dev_t dev; 537 off_t off; 538 int prot; 539 { 540 struct cgfourteen_softc *sc = cgfourteen_cd.cd_devs[minor(dev)]; 541 542 #define CG3START (128*1024 + 128*1024) 543 #define CG8START (256*1024) 544 #define NOOVERLAY (0x04000000) 545 546 if (off & PGOFSET) 547 panic("cgfourteenmmap"); 548 549 if (off < 0) 550 return (-1); 551 552 #if defined(DEBUG) && defined(CG14_MAP_REGS) /* XXX: security hole */ 553 /* 554 * Map the control registers into user space. Should only be 555 * used for debugging! 556 */ 557 if ((u_int)off >= 0x10000000 && (u_int)off < 0x10000000 + 16*4096) { 558 off -= 0x10000000; 559 if (bus_space_mmap(sc->sc_bustag, 560 BUS_ADDR(sc->sc_physadr[CG14_CTL_IDX].sbr_slot, 561 sc->sc_physadr[CG14_CTL_IDX].sbr_offset), 562 off, prot, BUS_SPACE_MAP_LINEAR)); 563 } 564 #endif 565 566 if ((u_int)off >= NOOVERLAY) 567 off -= NOOVERLAY; 568 #ifdef CG14_CG8 569 else if ((u_int)off >= CG8START) { 570 off -= CG8START; 571 } 572 #else 573 else if ((u_int)off >= CG3START) 574 off -= CG3START; 575 #endif 576 else 577 off = 0; 578 579 if (off >= sc->sc_fb.fb_type.fb_size * 580 sc->sc_fb.fb_type.fb_depth/8) { 581 #ifdef DEBUG 582 printf("\nmmap request out of bounds: request 0x%x, " 583 "bound 0x%x\n", (unsigned) off, 584 (unsigned)sc->sc_fb.fb_type.fb_size); 585 #endif 586 return (-1); 587 } 588 589 return (bus_space_mmap(sc->sc_bustag, 590 BUS_ADDR(sc->sc_physadr[CG14_PXL_IDX].sbr_slot, 591 sc->sc_physadr[CG14_PXL_IDX].sbr_offset), 592 off, prot, BUS_SPACE_MAP_LINEAR)); 593 } 594 595 int 596 cgfourteenpoll(dev, events, p) 597 dev_t dev; 598 int events; 599 struct proc *p; 600 { 601 602 return (seltrue(dev, events, p)); 603 } 604 605 /* 606 * Miscellaneous helper functions 607 */ 608 609 /* Initialize the framebuffer, storing away useful state for later reset */ 610 static void 611 cg14_init(sc) 612 struct cgfourteen_softc *sc; 613 { 614 u_int32_t *clut; 615 u_int8_t *xlut; 616 int i; 617 618 /* 619 * We stash away the following to restore on close: 620 * 621 * color look-up table 1 (sc->sc_saveclut) 622 * x look-up table (sc->sc_savexlut) 623 * control register (sc->sc_savectl) 624 * cursor control register (sc->sc_savehwc) 625 */ 626 sc->sc_savectl = sc->sc_ctl->ctl_mctl; 627 sc->sc_savehwc = sc->sc_hwc->curs_ctl; 628 629 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 630 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 631 for (i = 0; i < CG14_CLUT_SIZE; i++) { 632 sc->sc_saveclut.cm_chip[i] = clut[i]; 633 sc->sc_savexlut[i] = xlut[i]; 634 } 635 636 #ifdef CG14_CG8 637 /* 638 * Enable the video, and put in 24 bit mode. 639 */ 640 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_32 | 641 CG14_MCTL_POWERCTL; 642 643 /* 644 * Zero the xlut to enable direct-color mode 645 */ 646 bzero(sc->sc_xlut, CG14_CLUT_SIZE); 647 #else 648 /* 649 * Enable the video and put it in 8 bit mode 650 */ 651 sc->sc_ctl->ctl_mctl = CG14_MCTL_ENABLEVID | CG14_MCTL_PIXMODE_8 | 652 CG14_MCTL_POWERCTL; 653 #endif 654 } 655 656 static void 657 cg14_reset(sc) /* Restore the state saved on cg14_init */ 658 struct cgfourteen_softc *sc; 659 { 660 u_int32_t *clut; 661 u_int8_t *xlut; 662 int i; 663 664 /* 665 * We restore the following, saved in cg14_init: 666 * 667 * color look-up table 1 (sc->sc_saveclut) 668 * x look-up table (sc->sc_savexlut) 669 * control register (sc->sc_savectl) 670 * cursor control register (sc->sc_savehwc) 671 * 672 * Note that we don't touch the video enable bits in the 673 * control register; otherwise, screenblank wouldn't work. 674 */ 675 sc->sc_ctl->ctl_mctl = (sc->sc_ctl->ctl_mctl & (CG14_MCTL_ENABLEVID | 676 CG14_MCTL_POWERCTL)) | 677 (sc->sc_savectl & ~(CG14_MCTL_ENABLEVID | 678 CG14_MCTL_POWERCTL)); 679 sc->sc_hwc->curs_ctl = sc->sc_savehwc; 680 681 clut = (u_int32_t *) sc->sc_clut1->clut_lut; 682 xlut = (u_int8_t *) sc->sc_xlut->xlut_lut; 683 for (i = 0; i < CG14_CLUT_SIZE; i++) { 684 clut[i] = sc->sc_saveclut.cm_chip[i]; 685 xlut[i] = sc->sc_savexlut[i]; 686 } 687 } 688 689 /* Enable/disable video display; power down monitor if DPMS-capable */ 690 static void 691 cg14_set_video(sc, enable) 692 struct cgfourteen_softc *sc; 693 int enable; 694 { 695 /* 696 * We can only use DPMS to power down the display if the chip revision 697 * is greater than 0. 698 */ 699 if (enable) { 700 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 701 sc->sc_ctl->ctl_mctl |= (CG14_MCTL_ENABLEVID | 702 CG14_MCTL_POWERCTL); 703 else 704 sc->sc_ctl->ctl_mctl |= CG14_MCTL_ENABLEVID; 705 } else { 706 if ((sc->sc_ctl->ctl_rsr & CG14_RSR_REVMASK) > 0) 707 sc->sc_ctl->ctl_mctl &= ~(CG14_MCTL_ENABLEVID | 708 CG14_MCTL_POWERCTL); 709 else 710 sc->sc_ctl->ctl_mctl &= ~CG14_MCTL_ENABLEVID; 711 } 712 } 713 714 /* Get status of video display */ 715 static int 716 cg14_get_video(sc) 717 struct cgfourteen_softc *sc; 718 { 719 return ((sc->sc_ctl->ctl_mctl & CG14_MCTL_ENABLEVID) != 0); 720 } 721 722 /* Read the software shadow colormap */ 723 static int 724 cg14_get_cmap(p, cm, cmsize) 725 struct fbcmap *p; 726 union cg14cmap *cm; 727 int cmsize; 728 { 729 u_int i, start, count; 730 u_char *cp; 731 732 start = p->index; 733 count = p->count; 734 if (start >= cmsize || start + count > cmsize) 735 #ifdef DEBUG 736 { 737 printf("putcmaperror: start %d cmsize %d count %d\n", 738 start,cmsize,count); 739 #endif 740 return (EINVAL); 741 #ifdef DEBUG 742 } 743 #endif 744 745 if (!uvm_useracc(p->red, count, B_WRITE) || 746 !uvm_useracc(p->green, count, B_WRITE) || 747 !uvm_useracc(p->blue, count, B_WRITE)) 748 return (EFAULT); 749 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 750 p->red[i] = cp[3]; 751 p->green[i] = cp[2]; 752 p->blue[i] = cp[1]; 753 } 754 return (0); 755 } 756 757 /* Write the software shadow colormap */ 758 static int 759 cg14_put_cmap(p, cm, cmsize) 760 struct fbcmap *p; 761 union cg14cmap *cm; 762 int cmsize; 763 { 764 u_int i, start, count; 765 u_char *cp; 766 767 start = p->index; 768 count = p->count; 769 if (start >= cmsize || start + count > cmsize) 770 #ifdef DEBUG 771 { 772 printf("putcmaperror: start %d cmsize %d count %d\n", 773 start,cmsize,count); 774 #endif 775 return (EINVAL); 776 #ifdef DEBUG 777 } 778 #endif 779 780 if (!uvm_useracc(p->red, count, B_READ) || 781 !uvm_useracc(p->green, count, B_READ) || 782 !uvm_useracc(p->blue, count, B_READ)) 783 return (EFAULT); 784 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 4, i++) { 785 cp[3] = p->red[i]; 786 cp[2] = p->green[i]; 787 cp[1] = p->blue[i]; 788 cp[0] = 0; /* no alpha channel */ 789 } 790 return (0); 791 } 792 793 static void 794 cg14_load_hwcmap(sc, start, ncolors) 795 struct cgfourteen_softc *sc; 796 int start, ncolors; 797 { 798 /* XXX switch to auto-increment, and on retrace intr */ 799 800 /* Setup pointers to source and dest */ 801 u_int32_t *colp = &sc->sc_cmap.cm_chip[start]; 802 volatile u_int32_t *lutp = &sc->sc_clut1->clut_lut[start]; 803 804 /* Copy by words */ 805 while (--ncolors >= 0) 806 *lutp++ = *colp++; 807 } 808 809 /* 810 * Load the cursor (overlay `foreground' and `background') colors. 811 */ 812 static void 813 cg14_setcursor(sc) 814 struct cgfourteen_softc *sc; 815 { 816 /* we need to subtract the hot-spot value here */ 817 #define COORD(f) (sc->sc_cursor.cc_pos.f - sc->sc_cursor.cc_hot.f) 818 819 sc->sc_hwc->curs_ctl = (sc->sc_cursor.cc_enable ? CG14_CURS_ENABLE : 0); 820 sc->sc_hwc->curs_x = COORD(x); 821 sc->sc_hwc->curs_y = COORD(y); 822 823 #undef COORD 824 } 825 826 static void 827 cg14_loadcursor(sc) 828 struct cgfourteen_softc *sc; 829 { 830 volatile struct cg14curs *hwc; 831 u_int edgemask, m; 832 int i; 833 834 /* 835 * Keep the top size.x bits. Here we *throw out* the top 836 * size.x bits from an all-one-bits word, introducing zeros in 837 * the top size.x bits, then invert all the bits to get what 838 * we really wanted as our mask. But this fails if size.x is 839 * 32---a sparc uses only the low 5 bits of the shift count--- 840 * so we have to special case that. 841 */ 842 edgemask = ~0; 843 if (sc->sc_cursor.cc_size.x < 32) 844 edgemask = ~(edgemask >> sc->sc_cursor.cc_size.x); 845 hwc = sc->sc_hwc; 846 for (i = 0; i < 32; i++) { 847 m = sc->sc_cursor.cc_eplane[i] & edgemask; 848 hwc->curs_plane0[i] = m; 849 hwc->curs_plane1[i] = m & sc->sc_cursor.cc_cplane[i]; 850 } 851 } 852 853 static void 854 cg14_loadomap(sc) 855 struct cgfourteen_softc *sc; 856 { 857 /* set background color */ 858 sc->sc_hwc->curs_color1 = sc->sc_cursor.cc_color.cm_chip[0]; 859 /* set foreground color */ 860 sc->sc_hwc->curs_color2 = sc->sc_cursor.cc_color.cm_chip[1]; 861 } 862
Indexes created Mon Sep 29 03:10:08 GMT 2025