cg4.c revision 1.4
1 /* $NetBSD: cg4.c,v 1.4 1995/04/10 05:45:29 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93 45 */ 46 47 /* 48 * color display (cg4) driver. 49 * 50 * Does not handle interrupts, even though they can occur. 51 * 52 * XXX should defer colormap updates to vertical retrace interrupts 53 */ 54 55 #include <sys/param.h> 56 #include <sys/device.h> 57 #include <sys/ioctl.h> 58 #include <sys/malloc.h> 59 #include <sys/mman.h> 60 #include <sys/tty.h> 61 62 #include <vm/vm.h> 63 64 #include <machine/cpu.h> 65 #include <machine/fbio.h> 66 #include <machine/autoconf.h> 67 #include <machine/pmap.h> 68 69 #include "fbvar.h" 70 #include "btreg.h" 71 #include "btvar.h" 72 #include "cg4reg.h" 73 74 extern unsigned char cpu_machine_id; 75 76 /* per-display variables */ 77 struct cg4_softc { 78 struct device sc_dev; /* base device */ 79 struct fbdevice sc_fb; /* frame buffer device */ 80 volatile struct bt_regs *sc_bt; /* Brooktree registers */ 81 int sc_phys; /* display RAM (phys addr) */ 82 int sc_blanked; /* true if blanked */ 83 union bt_cmap sc_cmap; /* Brooktree color map */ 84 }; 85 86 /* autoconfiguration driver */ 87 static void cg4attach __P((struct device *, struct device *, void *)); 88 static int cg4match __P((struct device *, void *, void *)); 89 90 struct cfdriver cgfourcd = { 91 NULL, "cgfour", cg4match, cg4attach, 92 DV_DULL, sizeof(struct cg4_softc) }; 93 94 /* frame buffer generic driver */ 95 int cg4open(), cg4close(), cg4mmap(); 96 97 static int cg4gattr __P((struct fbdevice *, struct fbgattr *)); 98 static int cg4gvideo __P((struct fbdevice *, int *)); 99 static int cg4svideo __P((struct fbdevice *, int *)); 100 static int cg4getcmap __P((struct fbdevice *, struct fbcmap *)); 101 static int cg4putcmap __P((struct fbdevice *, struct fbcmap *)); 102 103 static struct fbdriver cg4fbdriver = { 104 cg4open, cg4close, cg4map, cg4gattr, 105 cg4gvideo, cg4svideo, 106 cg4getcmap, cg4putcmap }; 107 108 static void cg4loadcmap __P((struct cg4_softc *, int, int)); 109 110 /* 111 * Match a cg4. 112 */ 113 static int 114 cg4match(parent, vcf, args) 115 struct device *parent; 116 void *vcf, *args; 117 { 118 struct confargs *ca = args; 119 int paddr, x; 120 121 /* XXX - Huge hack due to lack of probe info... */ 122 switch (cpu_machine_id) { 123 /* Machines that might have a cg4 (gag). */ 124 case SUN3_MACH_50: 125 case SUN3_MACH_60: 126 case SUN3_MACH_110: 127 break; 128 default: 129 return (0); 130 } 131 132 if (ca->ca_paddr == -1) 133 ca->ca_paddr = 0xFF200000; 134 135 paddr = ca->ca_paddr; 136 x = bus_peek(ca->ca_bustype, paddr, 1); 137 if (x == -1) 138 return (0); 139 140 paddr += CG4REG_PIXMAP; 141 x = bus_peek(ca->ca_bustype, paddr, 1); 142 if (x == -1) 143 return (0); 144 145 return (1); 146 } 147 148 /* 149 * Attach a display. We need to notice if it is the console, too. 150 */ 151 static void 152 cg4attach(parent, self, args) 153 struct device *parent, *self; 154 void *args; 155 { 156 struct cg4_softc *sc = (struct cg4_softc *)self; 157 struct fbdevice *fb = &sc->sc_fb; 158 struct confargs *ca = args; 159 struct fbtype *fbt; 160 volatile struct bt_regs *bt; 161 int i, ramsize, pa; 162 163 fb->fb_driver = &cg4fbdriver; 164 fb->fb_private = sc; 165 fb->fb_name = sc->sc_dev.dv_xname; 166 167 fbt = &fb->fb_fbtype; 168 fbt->fb_type = FBTYPE_SUN4COLOR; 169 fbt->fb_depth = 8; 170 fbt->fb_cmsize = 256; 171 172 fbt->fb_width = 1152; 173 fbt->fb_height = 900; 174 fbt->fb_size = CG4_MMAP_SIZE; 175 176 sc->sc_phys = ca->ca_paddr; 177 sc->sc_bt = (struct bt_regs *) 178 bus_mapin(ca->ca_bustype, ca->ca_paddr, 179 sizeof(struct bt_regs *)); 180 181 /* grab initial (current) color map */ 182 bt->bt_addr = 0; 183 for (i = 0; i < (256 * 3 / 4); i++) 184 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 185 186 /* 187 * BT458 chip initialization as described in Brooktree's 188 * 1993 Graphics and Imaging Product Databook (DB004-1/93). 189 */ 190 bt->bt_addr = 0x04; /* select read mask register */ 191 bt->bt_ctrl = 0xff; /* all planes on */ 192 bt->bt_addr = 0x05; /* select blink mask register */ 193 bt->bt_ctrl = 0x00; /* all planes non-blinking */ 194 bt->bt_addr = 0x06; /* select command register */ 195 bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */ 196 bt->bt_addr = 0x07; /* select test register */ 197 bt->bt_ctrl = 0x00; /* set test mode */ 198 199 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 200 fb_attach(fb, 4); 201 } 202 203 int 204 cg4open(dev, flags, mode, p) 205 dev_t dev; 206 int flags, mode; 207 struct proc *p; 208 { 209 int unit = minor(dev); 210 211 if (unit >= cgfourcd.cd_ndevs || cgfourcd.cd_devs[unit] == NULL) 212 return (ENXIO); 213 return (0); 214 } 215 216 int 217 cg4close(dev, flags, mode, p) 218 dev_t dev; 219 int flags, mode; 220 struct proc *p; 221 { 222 223 return (0); 224 } 225 226 int 227 cg4ioctl(dev, cmd, data, flags, p) 228 dev_t dev; 229 u_long cmd; 230 caddr_t data; 231 int flags; 232 struct proc *p; 233 { 234 struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; 235 236 return (fbioctlfb(&sc->sc_fb, cmd, data)); 237 } 238 239 /* 240 * Return the address that would map the given device at the given 241 * offset, allowing for the given protection, or return -1 for error. 242 * 243 * X11 expects its mmap'd region to look like this: 244 * 128k overlay memory 245 * 128k overlay-enable bitmap 246 * 1024k color memory 247 * 248 * The hardware really looks like this (starting at ca_paddr) 249 * 4 bytes Brooktree DAC registers 250 * 2MB-4 gap 251 * 128k overlay memory 252 * 1920k gap 253 * 128k overlay-enable bitmap 254 * 1920k gap 255 * 1024k color memory 256 */ 257 int 258 cg4mmap(dev, off, prot) 259 dev_t dev; 260 register int off; 261 int prot; 262 { 263 struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; 264 register int physbase; 265 266 if (off & PGOFSET) 267 panic("cg4map"); 268 269 if ((unsigned)off >= CG4_MMAP_SIZE) 270 return (-1); 271 272 physbase = sc->sc_phys; 273 if (off < 0x40000) { 274 if (off < 0x20000) { 275 /* overlay plane */ 276 physbase += CG4REG_OVERLAY; 277 } else { 278 /* enable plane */ 279 off -= 0x20000; 280 physbase += CG4REG_ENABLE; 281 } 282 } else { 283 /* pixel map */ 284 off -= 0x40000; 285 physbase += CG4REG_PIXMAP; 286 } 287 288 /* 289 * I turned on PMAP_NC here to disable the cache as I was 290 * getting horribly broken behaviour with it on. 291 */ 292 return ((physbase + off) | PMAP_NC); 293 } 294 295 /* 296 * Internal ioctl functions. 297 */ 298 299 /* FBIOGATTR: */ 300 static int cg4gattr(fb, fba) 301 struct fbdevice *fb; 302 struct fbgattr *fba; 303 { 304 305 fba->real_type = fb->fb_fbtype.fb_type; 306 fba->owner = 0; /* XXX - TIOCCONS stuff? */ 307 fba->fbtype = fb->fb_fbtype; 308 fba->sattr.flags = 0; 309 fba->sattr.emu_type = fb->fb_fbtype.fb_type; 310 fba->sattr.dev_specific[0] = -1; 311 fba->emu_types[0] = fb->fb_fbtype.fb_type; 312 fba->emu_types[1] = -1; 313 return (0); 314 } 315 316 /* FBIOGVIDEO: */ 317 static int cg4gvideo(fb, on) 318 struct fbdevice *fb; 319 int *on; 320 { 321 struct cg4_softc *sc = fb->fb_private; 322 323 *on = !sc->sc_blanked; 324 return (0); 325 } 326 327 /* FBIOSVIDEO: */ 328 static int cg4svideo(fb, on) 329 struct fbdevice *fb; 330 int *on; 331 { 332 struct cg4_softc *sc = fb->fb_private; 333 register volatile struct bt_regs *bt = sc->sc_bt; 334 335 if ((*on == 0) && (sc->sc_blanked == 0)) { 336 /* Turn OFF video (blank it). */ 337 bt->bt_addr = 0x06; /* command reg */ 338 bt->bt_ctrl = 0x70; /* overlay plane */ 339 bt->bt_addr = 0x04; /* read mask */ 340 bt->bt_ctrl = 0x00; /* color planes */ 341 /* 342 * Set color 0 to black -- note that this overwrites 343 * R of color 1. 344 */ 345 bt->bt_addr = 0; 346 bt->bt_cmap = 0; 347 348 sc->sc_blanked = 1; 349 } 350 351 if ((*on != 0) && (sc->sc_blanked != 0)) { 352 /* Turn video back ON (unblank). */ 353 sc->sc_blanked = 0; 354 355 /* restore color 0 (and R of color 1) */ 356 bt->bt_addr = 0; 357 bt->bt_cmap = sc->sc_cmap.cm_chip[0]; 358 359 /* restore read mask */ 360 bt->bt_addr = 0x06; /* command reg */ 361 bt->bt_ctrl = 0x73; /* overlay plane */ 362 bt->bt_addr = 0x04; /* read mask */ 363 bt->bt_ctrl = 0xff; /* color planes */ 364 } 365 return (0); 366 } 367 368 /* FBIOGETCMAP: */ 369 static int cg4getcmap(fb, cmap) 370 struct fbdevice *fb; 371 struct fbcmap *cmap; 372 { 373 struct cg4_softc *sc = fb->fb_private; 374 375 return (bt_getcmap(cmap, &sc->sc_cmap, 256)); 376 } 377 378 /* FBIOPUTCMAP: */ 379 static int cg4putcmap(fb, cmap) 380 struct fbdevice *fb; 381 struct fbcmap *cmap; 382 { 383 struct cg4_softc *sc = fb->fb_private; 384 int error; 385 386 /* copy to software map */ 387 error = bt_putcmap(cmap, &sc->sc_cmap, 256); 388 if (error == 0) { 389 /* now blast them into the chip */ 390 /* XXX should use retrace interrupt */ 391 cg4loadcmap(sc, cmap->index, cmap->count); 392 } 393 return (error); 394 } 395 396 /* 397 * Load a subset of the current (new) colormap into the Brooktree DAC. 398 */ 399 static void 400 cg4loadcmap(sc, start, ncolors) 401 struct cg4_softc *sc; 402 int start, ncolors; 403 { 404 volatile struct bt_regs *bt; 405 u_int *ip; 406 int count; 407 408 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 409 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 410 bt = sc->sc_bt; 411 bt->bt_addr = BT_D4M4(start); 412 while (--count >= 0) 413 bt->bt_cmap = *ip++; 414 } 415
Indexes created Mon Sep 29 21:09:56 GMT 2025