1 /* $NetBSD: cgfour.c,v 1.50 2014/10/18 08:33:26 snj Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1992, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This software was developed by the Computer Systems Engineering group 37 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 38 * contributed to Berkeley. 39 * 40 * All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Lawrence Berkeley Laboratory. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 * 69 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 70 */ 71 72 /* 73 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 85 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 86 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 87 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 88 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 89 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 90 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 91 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 92 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 93 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 94 */ 95 96 /* 97 * color display (cgfour) driver. 98 * 99 * Does not handle interrupts, even though they can occur. 100 * 101 * XXX should defer colormap updates to vertical retrace interrupts 102 */ 103 104 #include <sys/cdefs.h> 105 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.50 2014/10/18 08:33:26 snj Exp $"); 106 107 #include <sys/param.h> 108 #include <sys/systm.h> 109 #include <sys/buf.h> 110 #include <sys/device.h> 111 #include <sys/ioctl.h> 112 #include <sys/malloc.h> 113 #include <sys/mman.h> 114 #include <sys/tty.h> 115 #include <sys/conf.h> 116 117 #include <machine/autoconf.h> 118 #include <machine/eeprom.h> 119 120 #include <dev/sun/fbio.h> 121 #include <dev/sun/fbvar.h> 122 #include <dev/sun/btreg.h> 123 #include <dev/sun/btvar.h> 124 #include <dev/sun/pfourreg.h> 125 126 /* per-display variables */ 127 struct cgfour_softc { 128 struct fbdevice sc_fb; /* frame buffer device */ 129 bus_space_tag_t sc_bustag; 130 bus_addr_t sc_paddr; /* phys address for device mmap() */ 131 132 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 133 union bt_cmap sc_cmap; /* Brooktree color map */ 134 }; 135 136 /* autoconfiguration driver */ 137 static int cgfourmatch(device_t, cfdata_t, void *); 138 static void cgfourattach(device_t, device_t, void *); 139 140 #if defined(SUN4) 141 static void cgfourunblank(device_t); 142 #endif 143 144 static int cg4_pfour_probe(void *, void *); 145 146 CFATTACH_DECL_NEW(cgfour, sizeof(struct cgfour_softc), 147 cgfourmatch, cgfourattach, NULL, NULL); 148 149 extern struct cfdriver cgfour_cd; 150 151 dev_type_open(cgfouropen); 152 dev_type_ioctl(cgfourioctl); 153 dev_type_mmap(cgfourmmap); 154 155 const struct cdevsw cgfour_cdevsw = { 156 .d_open = cgfouropen, 157 .d_close = nullclose, 158 .d_read = noread, 159 .d_write = nowrite, 160 .d_ioctl = cgfourioctl, 161 .d_stop = nostop, 162 .d_tty = notty, 163 .d_poll = nopoll, 164 .d_mmap = cgfourmmap, 165 .d_kqfilter = nokqfilter, 166 .d_discard = nodiscard, 167 .d_flag = 0 168 }; 169 170 #if defined(SUN4) 171 /* frame buffer generic driver */ 172 static struct fbdriver cgfourfbdriver = { 173 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 174 cgfourmmap, nokqfilter 175 }; 176 177 static void cgfourloadcmap(struct cgfour_softc *, int, int); 178 static int cgfour_get_video(struct cgfour_softc *); 179 static void cgfour_set_video(struct cgfour_softc *, int); 180 #endif 181 182 /* 183 * Match a cgfour. 184 */ 185 static int 186 cgfourmatch(device_t parent, cfdata_t cf, void *aux) 187 { 188 union obio_attach_args *uoba = aux; 189 struct obio4_attach_args *oba; 190 191 if (uoba->uoba_isobio4 == 0) 192 return (0); 193 194 oba = &uoba->uoba_oba4; 195 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 196 4, /* probe size */ 197 0, /* offset */ 198 0, /* flags */ 199 cg4_pfour_probe, NULL)); 200 } 201 202 static int 203 cg4_pfour_probe(void *vaddr, void *arg) 204 { 205 206 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 207 } 208 209 /* 210 * Attach a display. We need to notice if it is the console, too. 211 */ 212 static void 213 cgfourattach(device_t parent, device_t self, void *aux) 214 { 215 #if defined(SUN4) 216 struct cgfour_softc *sc = device_private(self); 217 union obio_attach_args *uoba = aux; 218 struct obio4_attach_args *oba = &uoba->uoba_oba4; 219 bus_space_handle_t bh; 220 volatile struct bt_regs *bt; 221 struct fbdevice *fb = &sc->sc_fb; 222 int ramsize, i, isconsole; 223 224 sc->sc_bustag = oba->oba_bustag; 225 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 226 227 /* Map the pfour register. */ 228 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 229 sizeof(uint32_t), 230 BUS_SPACE_MAP_LINEAR, 231 &bh) != 0) { 232 printf("%s: cannot map control registers\n", 233 device_xname(self)); 234 return; 235 } 236 fb->fb_pfour = (volatile uint32_t *)bh; 237 238 fb->fb_driver = &cgfourfbdriver; 239 fb->fb_device = self; 240 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 241 fb->fb_flags = device_cfdata(self)->cf_flags & FB_USERMASK; 242 fb->fb_flags |= FB_PFOUR; 243 244 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 245 246 fb->fb_type.fb_depth = 8; 247 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 248 249 fb->fb_type.fb_cmsize = 256; 250 fb->fb_type.fb_size = ramsize; 251 printf(": cgfour/p4, %d x %d", 252 fb->fb_type.fb_width, fb->fb_type.fb_height); 253 254 isconsole = 0; 255 256 if (CPU_ISSUN4) { 257 struct eeprom *eep = (struct eeprom *)eeprom_va; 258 259 /* 260 * Assume this is the console if there's no eeprom info 261 * to be found. 262 */ 263 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 264 isconsole = fb_is_console(0); 265 } 266 267 #if 0 268 /* 269 * We don't do any of the console handling here. Instead, 270 * we let the bwtwo driver pick up the overlay plane and 271 * use it instead. Rconsole should have better performance 272 * with the 1-bit depth. 273 * -- Jason R. Thorpe <thorpej@NetBSD.org> 274 */ 275 276 /* 277 * When the ROM has mapped in a cgfour display, the address 278 * maps only the video RAM, so in any case we have to map the 279 * registers ourselves. We only need the video RAM if we are 280 * going to print characters via rconsole. 281 */ 282 283 if (isconsole) { 284 /* XXX this is kind of a waste */ 285 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 286 PFOUR_COLOR_OFF_OVERLAY, ramsize); 287 } 288 #endif 289 290 /* Map the Brooktree. */ 291 if (bus_space_map(oba->oba_bustag, 292 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 293 sizeof(struct fbcontrol), 294 BUS_SPACE_MAP_LINEAR, 295 &bh) != 0) { 296 printf("%s: cannot map control registers\n", 297 device_xname(self)); 298 return; 299 } 300 sc->sc_fbc = (volatile struct fbcontrol *)bh; 301 302 /* grab initial (current) color map */ 303 bt = &sc->sc_fbc->fbc_dac; 304 bt->bt_addr = 0; 305 for (i = 0; i < 256 * 3 / 4; i++) 306 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 307 308 BT_INIT(bt, 24); 309 310 #if 0 /* See above. */ 311 if (isconsole) { 312 printf(" (console)\n"); 313 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 314 fbrcons_init(fb); 315 #endif 316 } else 317 #endif /* 0 */ 318 printf("\n"); 319 320 /* 321 * Even though we're not using rconsole, we'd still like 322 * to notice if we're the console framebuffer. 323 */ 324 fb_attach(fb, isconsole); 325 #endif /* SUN4 */ 326 } 327 328 int 329 cgfouropen(dev_t dev, int flags, int mode, struct lwp *l) 330 { 331 int unit = minor(dev); 332 333 if (device_lookup(&cgfour_cd, unit) == NULL) 334 return (ENXIO); 335 return (0); 336 } 337 338 int 339 cgfourioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 340 { 341 #if defined(SUN4) 342 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 343 struct fbgattr *fba; 344 int error; 345 346 switch (cmd) { 347 348 case FBIOGTYPE: 349 *(struct fbtype *)data = sc->sc_fb.fb_type; 350 break; 351 352 case FBIOGATTR: 353 fba = (struct fbgattr *)data; 354 fba->real_type = sc->sc_fb.fb_type.fb_type; 355 fba->owner = 0; /* XXX ??? */ 356 fba->fbtype = sc->sc_fb.fb_type; 357 fba->sattr.flags = 0; 358 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 359 fba->sattr.dev_specific[0] = -1; 360 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 361 fba->emu_types[1] = -1; 362 break; 363 364 case FBIOGETCMAP: 365 #define p ((struct fbcmap *)data) 366 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 367 368 case FBIOPUTCMAP: 369 /* copy to software map */ 370 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 371 if (error) 372 return (error); 373 /* now blast them into the chip */ 374 /* XXX should use retrace interrupt */ 375 cgfourloadcmap(sc, p->index, p->count); 376 #undef p 377 break; 378 379 case FBIOGVIDEO: 380 *(int *)data = cgfour_get_video(sc); 381 break; 382 383 case FBIOSVIDEO: 384 cgfour_set_video(sc, *(int *)data); 385 break; 386 387 default: 388 return (ENOTTY); 389 } 390 #endif /* SUN4 */ 391 392 return (0); 393 } 394 395 /* 396 * Return the address that would map the given device at the given 397 * offset, allowing for the given protection, or return -1 for error. 398 * 399 * the cg4 maps its overlay plane for 128K, followed by the enable 400 * plane for 128K, followed by the colour plane (for as much colour 401 * as their is.) 402 * 403 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 404 * only its colour plane, at 0. 405 */ 406 paddr_t 407 cgfourmmap(dev_t dev, off_t off, int prot) 408 { 409 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 410 off_t poff; 411 412 #define START_ENABLE (128*1024) 413 #define START_COLOR ((128*1024) + (128*1024)) 414 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 415 sc->sc_fb.fb_type.fb_height) 416 #define END_COLOR (START_COLOR + COLOR_SIZE) 417 #define NOOVERLAY (0x04000000) 418 419 if (off & PGOFSET) 420 panic("cgfourmap"); 421 422 if (off < 0) 423 return (-1); 424 else if ((u_int)off >= NOOVERLAY) { 425 off -= NOOVERLAY; 426 427 /* 428 * X11 maps a huge chunk of the frame buffer; far more than 429 * there really is. We compensate by double-mapping the 430 * first page for as many other pages as it wants 431 */ 432 while ((u_int)off >= COLOR_SIZE) 433 off -= COLOR_SIZE; /* XXX thorpej ??? */ 434 435 poff = off + PFOUR_COLOR_OFF_COLOR; 436 } else if ((u_int)off < START_ENABLE) { 437 /* 438 * in overlay plane 439 */ 440 poff = PFOUR_COLOR_OFF_OVERLAY + off; 441 } else if ((u_int)off < START_COLOR) { 442 /* 443 * in enable plane 444 */ 445 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 446 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 447 /* 448 * in colour plane 449 */ 450 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 451 } else 452 return (-1); 453 454 return (bus_space_mmap(sc->sc_bustag, 455 sc->sc_paddr, poff, 456 prot, BUS_SPACE_MAP_LINEAR)); 457 } 458 459 #if defined(SUN4) 460 /* 461 * Undo the effect of an FBIOSVIDEO that turns the video off. 462 */ 463 static void 464 cgfourunblank(device_t dev) 465 { 466 467 cgfour_set_video(device_private(dev), 1); 468 } 469 470 static int 471 cgfour_get_video(struct cgfour_softc *sc) 472 { 473 474 return (fb_pfour_get_video(&sc->sc_fb)); 475 } 476 477 static void 478 cgfour_set_video(struct cgfour_softc *sc, int enable) 479 { 480 481 fb_pfour_set_video(&sc->sc_fb, enable); 482 } 483 484 /* 485 * Load a subset of the current (new) colormap into the Brooktree DAC. 486 */ 487 static void 488 cgfourloadcmap(struct cgfour_softc *sc, int start, int ncolors) 489 { 490 volatile struct bt_regs *bt; 491 u_int *ip, i; 492 int count; 493 494 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 495 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 496 bt = &sc->sc_fbc->fbc_dac; 497 bt->bt_addr = BT_D4M4(start) << 24; 498 while (--count >= 0) { 499 i = *ip++; 500 /* hardware that makes one want to pound boards with hammers */ 501 bt->bt_cmap = i; 502 bt->bt_cmap = i << 8; 503 bt->bt_cmap = i << 16; 504 bt->bt_cmap = i << 24; 505 } 506 } 507 #endif /* SUN4 */ 508