1 /* $NetBSD: cgfour.c,v 1.51 2023/12/20 05:33:18 thorpej 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 1.51 2023/12/20 05:33:18 thorpej 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/mman.h> 113 #include <sys/tty.h> 114 #include <sys/conf.h> 115 116 #include <machine/autoconf.h> 117 #include <machine/eeprom.h> 118 119 #include <dev/sun/fbio.h> 120 #include <dev/sun/fbvar.h> 121 #include <dev/sun/btreg.h> 122 #include <dev/sun/btvar.h> 123 #include <dev/sun/pfourreg.h> 124 125 /* per-display variables */ 126 struct cgfour_softc { 127 struct fbdevice sc_fb; /* frame buffer device */ 128 bus_space_tag_t sc_bustag; 129 bus_addr_t sc_paddr; /* phys address for device mmap() */ 130 131 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 132 union bt_cmap sc_cmap; /* Brooktree color map */ 133 }; 134 135 /* autoconfiguration driver */ 136 static int cgfourmatch(device_t, cfdata_t, void *); 137 static void cgfourattach(device_t, device_t, void *); 138 139 #if defined(SUN4) 140 static void cgfourunblank(device_t); 141 #endif 142 143 static int cg4_pfour_probe(void *, void *); 144 145 CFATTACH_DECL_NEW(cgfour, sizeof(struct cgfour_softc), 146 cgfourmatch, cgfourattach, NULL, NULL); 147 148 extern struct cfdriver cgfour_cd; 149 150 dev_type_open(cgfouropen); 151 dev_type_ioctl(cgfourioctl); 152 dev_type_mmap(cgfourmmap); 153 154 const struct cdevsw cgfour_cdevsw = { 155 .d_open = cgfouropen, 156 .d_close = nullclose, 157 .d_read = noread, 158 .d_write = nowrite, 159 .d_ioctl = cgfourioctl, 160 .d_stop = nostop, 161 .d_tty = notty, 162 .d_poll = nopoll, 163 .d_mmap = cgfourmmap, 164 .d_kqfilter = nokqfilter, 165 .d_discard = nodiscard, 166 .d_flag = 0 167 }; 168 169 #if defined(SUN4) 170 /* frame buffer generic driver */ 171 static struct fbdriver cgfourfbdriver = { 172 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 173 cgfourmmap, nokqfilter 174 }; 175 176 static void cgfourloadcmap(struct cgfour_softc *, int, int); 177 static int cgfour_get_video(struct cgfour_softc *); 178 static void cgfour_set_video(struct cgfour_softc *, int); 179 #endif 180 181 /* 182 * Match a cgfour. 183 */ 184 static int 185 cgfourmatch(device_t parent, cfdata_t cf, void *aux) 186 { 187 union obio_attach_args *uoba = aux; 188 struct obio4_attach_args *oba; 189 190 if (uoba->uoba_isobio4 == 0) 191 return (0); 192 193 oba = &uoba->uoba_oba4; 194 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 195 4, /* probe size */ 196 0, /* offset */ 197 0, /* flags */ 198 cg4_pfour_probe, NULL)); 199 } 200 201 static int 202 cg4_pfour_probe(void *vaddr, void *arg) 203 { 204 205 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 206 } 207 208 /* 209 * Attach a display. We need to notice if it is the console, too. 210 */ 211 static void 212 cgfourattach(device_t parent, device_t self, void *aux) 213 { 214 #if defined(SUN4) 215 struct cgfour_softc *sc = device_private(self); 216 union obio_attach_args *uoba = aux; 217 struct obio4_attach_args *oba = &uoba->uoba_oba4; 218 bus_space_handle_t bh; 219 volatile struct bt_regs *bt; 220 struct fbdevice *fb = &sc->sc_fb; 221 int ramsize, i, isconsole; 222 223 sc->sc_bustag = oba->oba_bustag; 224 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 225 226 /* Map the pfour register. */ 227 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 228 sizeof(uint32_t), 229 BUS_SPACE_MAP_LINEAR, 230 &bh) != 0) { 231 printf("%s: cannot map control registers\n", 232 device_xname(self)); 233 return; 234 } 235 fb->fb_pfour = (volatile uint32_t *)bh; 236 237 fb->fb_driver = &cgfourfbdriver; 238 fb->fb_device = self; 239 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 240 fb->fb_flags = device_cfdata(self)->cf_flags & FB_USERMASK; 241 fb->fb_flags |= FB_PFOUR; 242 243 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 244 245 fb->fb_type.fb_depth = 8; 246 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 247 248 fb->fb_type.fb_cmsize = 256; 249 fb->fb_type.fb_size = ramsize; 250 printf(": cgfour/p4, %d x %d", 251 fb->fb_type.fb_width, fb->fb_type.fb_height); 252 253 isconsole = 0; 254 255 if (CPU_ISSUN4) { 256 struct eeprom *eep = (struct eeprom *)eeprom_va; 257 258 /* 259 * Assume this is the console if there's no eeprom info 260 * to be found. 261 */ 262 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 263 isconsole = fb_is_console(0); 264 } 265 266 #if 0 267 /* 268 * We don't do any of the console handling here. Instead, 269 * we let the bwtwo driver pick up the overlay plane and 270 * use it instead. Rconsole should have better performance 271 * with the 1-bit depth. 272 * -- Jason R. Thorpe <thorpej (at) NetBSD.org> 273 */ 274 275 /* 276 * When the ROM has mapped in a cgfour display, the address 277 * maps only the video RAM, so in any case we have to map the 278 * registers ourselves. We only need the video RAM if we are 279 * going to print characters via rconsole. 280 */ 281 282 if (isconsole) { 283 /* XXX this is kind of a waste */ 284 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 285 PFOUR_COLOR_OFF_OVERLAY, ramsize); 286 } 287 #endif 288 289 /* Map the Brooktree. */ 290 if (bus_space_map(oba->oba_bustag, 291 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 292 sizeof(struct fbcontrol), 293 BUS_SPACE_MAP_LINEAR, 294 &bh) != 0) { 295 printf("%s: cannot map control registers\n", 296 device_xname(self)); 297 return; 298 } 299 sc->sc_fbc = (volatile struct fbcontrol *)bh; 300 301 /* grab initial (current) color map */ 302 bt = &sc->sc_fbc->fbc_dac; 303 bt->bt_addr = 0; 304 for (i = 0; i < 256 * 3 / 4; i++) 305 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 306 307 BT_INIT(bt, 24); 308 309 #if 0 /* See above. */ 310 if (isconsole) { 311 printf(" (console)\n"); 312 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 313 fbrcons_init(fb); 314 #endif 315 } else 316 #endif /* 0 */ 317 printf("\n"); 318 319 /* 320 * Even though we're not using rconsole, we'd still like 321 * to notice if we're the console framebuffer. 322 */ 323 fb_attach(fb, isconsole); 324 #endif /* SUN4 */ 325 } 326 327 int 328 cgfouropen(dev_t dev, int flags, int mode, struct lwp *l) 329 { 330 int unit = minor(dev); 331 332 if (device_lookup(&cgfour_cd, unit) == NULL) 333 return (ENXIO); 334 return (0); 335 } 336 337 int 338 cgfourioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 339 { 340 #if defined(SUN4) 341 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 342 struct fbgattr *fba; 343 int error; 344 345 switch (cmd) { 346 347 case FBIOGTYPE: 348 *(struct fbtype *)data = sc->sc_fb.fb_type; 349 break; 350 351 case FBIOGATTR: 352 fba = (struct fbgattr *)data; 353 fba->real_type = sc->sc_fb.fb_type.fb_type; 354 fba->owner = 0; /* XXX ??? */ 355 fba->fbtype = sc->sc_fb.fb_type; 356 fba->sattr.flags = 0; 357 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 358 fba->sattr.dev_specific[0] = -1; 359 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 360 fba->emu_types[1] = -1; 361 break; 362 363 case FBIOGETCMAP: 364 #define p ((struct fbcmap *)data) 365 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 366 367 case FBIOPUTCMAP: 368 /* copy to software map */ 369 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 370 if (error) 371 return (error); 372 /* now blast them into the chip */ 373 /* XXX should use retrace interrupt */ 374 cgfourloadcmap(sc, p->index, p->count); 375 #undef p 376 break; 377 378 case FBIOGVIDEO: 379 *(int *)data = cgfour_get_video(sc); 380 break; 381 382 case FBIOSVIDEO: 383 cgfour_set_video(sc, *(int *)data); 384 break; 385 386 default: 387 return (ENOTTY); 388 } 389 #endif /* SUN4 */ 390 391 return (0); 392 } 393 394 /* 395 * Return the address that would map the given device at the given 396 * offset, allowing for the given protection, or return -1 for error. 397 * 398 * the cg4 maps its overlay plane for 128K, followed by the enable 399 * plane for 128K, followed by the colour plane (for as much colour 400 * as their is.) 401 * 402 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 403 * only its colour plane, at 0. 404 */ 405 paddr_t 406 cgfourmmap(dev_t dev, off_t off, int prot) 407 { 408 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 409 off_t poff; 410 411 #define START_ENABLE (128*1024) 412 #define START_COLOR ((128*1024) + (128*1024)) 413 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 414 sc->sc_fb.fb_type.fb_height) 415 #define END_COLOR (START_COLOR + COLOR_SIZE) 416 #define NOOVERLAY (0x04000000) 417 418 if (off & PGOFSET) 419 panic("cgfourmap"); 420 421 if (off < 0) 422 return (-1); 423 else if ((u_int)off >= NOOVERLAY) { 424 off -= NOOVERLAY; 425 426 /* 427 * X11 maps a huge chunk of the frame buffer; far more than 428 * there really is. We compensate by double-mapping the 429 * first page for as many other pages as it wants 430 */ 431 while ((u_int)off >= COLOR_SIZE) 432 off -= COLOR_SIZE; /* XXX thorpej ??? */ 433 434 poff = off + PFOUR_COLOR_OFF_COLOR; 435 } else if ((u_int)off < START_ENABLE) { 436 /* 437 * in overlay plane 438 */ 439 poff = PFOUR_COLOR_OFF_OVERLAY + off; 440 } else if ((u_int)off < START_COLOR) { 441 /* 442 * in enable plane 443 */ 444 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 445 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 446 /* 447 * in colour plane 448 */ 449 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 450 } else 451 return (-1); 452 453 return (bus_space_mmap(sc->sc_bustag, 454 sc->sc_paddr, poff, 455 prot, BUS_SPACE_MAP_LINEAR)); 456 } 457 458 #if defined(SUN4) 459 /* 460 * Undo the effect of an FBIOSVIDEO that turns the video off. 461 */ 462 static void 463 cgfourunblank(device_t dev) 464 { 465 466 cgfour_set_video(device_private(dev), 1); 467 } 468 469 static int 470 cgfour_get_video(struct cgfour_softc *sc) 471 { 472 473 return (fb_pfour_get_video(&sc->sc_fb)); 474 } 475 476 static void 477 cgfour_set_video(struct cgfour_softc *sc, int enable) 478 { 479 480 fb_pfour_set_video(&sc->sc_fb, enable); 481 } 482 483 /* 484 * Load a subset of the current (new) colormap into the Brooktree DAC. 485 */ 486 static void 487 cgfourloadcmap(struct cgfour_softc *sc, int start, int ncolors) 488 { 489 volatile struct bt_regs *bt; 490 u_int *ip, i; 491 int count; 492 493 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 494 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 495 bt = &sc->sc_fbc->fbc_dac; 496 bt->bt_addr = BT_D4M4(start) << 24; 497 while (--count >= 0) { 498 i = *ip++; 499 /* hardware that makes one want to pound boards with hammers */ 500 bt->bt_cmap = i; 501 bt->bt_cmap = i << 8; 502 bt->bt_cmap = i << 16; 503 bt->bt_cmap = i << 24; 504 } 505 } 506 #endif /* SUN4 */ 507
Indexes created Mon Sep 29 15:09:53 GMT 2025