cg4.c revision 1.2
1 /* $NetBSD: cg4.c,v 1.2 1995/04/07 02:43:25 gwr 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(), cg4map(); 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 + CG4REG_PIXMAP + CG4_PIXMAP_SIZE - 8; 136 x = bus_peek(ca->ca_bustype, paddr, 1); 137 return (x != -1); 138 } 139 140 /* 141 * Attach a display. We need to notice if it is the console, too. 142 */ 143 static void 144 cg4attach(parent, self, args) 145 struct device *parent, *self; 146 void *args; 147 { 148 struct cg4_softc *sc = (struct cg4_softc *)self; 149 struct fbdevice *fb = &sc->sc_fb; 150 struct confargs *ca = args; 151 struct fbtype *fbt; 152 volatile struct bt_regs *bt; 153 int i, ramsize, pa; 154 155 fb->fb_driver = &cg4fbdriver; 156 fb->fb_private = sc; 157 fb->fb_name = sc->sc_dev.dv_xname; 158 159 fbt = &fb->fb_fbtype; 160 fbt->fb_type = FBTYPE_SUN4COLOR; 161 fbt->fb_depth = 8; 162 fbt->fb_cmsize = 256; 163 164 fbt->fb_width = 1152; 165 fbt->fb_height = 900; 166 fbt->fb_size = CG4_MMAP_SIZE; 167 168 sc->sc_phys = ca->ca_paddr; 169 sc->sc_bt = (struct bt_regs *) 170 bus_mapin(ca->ca_bustype, ca->ca_paddr, 171 sizeof(struct bt_regs *)); 172 173 /* grab initial (current) color map */ 174 bt->bt_addr = 0; 175 for (i = 0; i < (256 * 3 / 4); i++) 176 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 177 178 /* 179 * BT458 chip initialization as described in Brooktree's 180 * 1993 Graphics and Imaging Product Databook (DB004-1/93). 181 */ 182 bt->bt_addr = 0x04; /* select read mask register */ 183 bt->bt_ctrl = 0xff; /* all planes on */ 184 bt->bt_addr = 0x05; /* select blink mask register */ 185 bt->bt_ctrl = 0x00; /* all planes non-blinking */ 186 bt->bt_addr = 0x06; /* select command register */ 187 bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */ 188 bt->bt_addr = 0x07; /* select test register */ 189 bt->bt_ctrl = 0x00; /* set test mode */ 190 191 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 192 fb_attach(fb, 4); 193 } 194 195 int 196 cg4open(dev, flags, mode, p) 197 dev_t dev; 198 int flags, mode; 199 struct proc *p; 200 { 201 int unit = minor(dev); 202 203 if (unit >= cgfourcd.cd_ndevs || cgfourcd.cd_devs[unit] == NULL) 204 return (ENXIO); 205 return (0); 206 } 207 208 int 209 cg4close(dev, flags, mode, p) 210 dev_t dev; 211 int flags, mode; 212 struct proc *p; 213 { 214 215 return (0); 216 } 217 218 int 219 cg4ioctl(dev, cmd, data, flags, p) 220 dev_t dev; 221 u_long cmd; 222 caddr_t data; 223 int flags; 224 struct proc *p; 225 { 226 struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; 227 228 return (fbioctlfb(&sc->sc_fb, cmd, data)); 229 } 230 231 /* 232 * Return the address that would map the given device at the given 233 * offset, allowing for the given protection, or return -1 for error. 234 * 235 * X11 expects its mmap'd region to look like this: 236 * 128k overlay memory 237 * 128k overlay-enable bitmap 238 * 1024k color memory 239 * 240 * The hardware really looks like this (starting at ca_paddr) 241 * 4 bytes Brooktree DAC registers 242 * 2MB-4 gap 243 * 128k overlay memory 244 * 1920k gap 245 * 128k overlay-enable bitmap 246 * 1920k gap 247 * 1024k color memory 248 */ 249 int 250 cg4map(dev, off, prot) 251 dev_t dev; 252 register int off; 253 int prot; 254 { 255 struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; 256 register int physbase; 257 258 if (off & PGOFSET) 259 panic("cg4map"); 260 261 if ((unsigned)off >= CG4_MMAP_SIZE) 262 return (-1); 263 264 physbase = sc->sc_phys; 265 if (off < 0x40000) { 266 if (off < 0x20000) { 267 /* overlay plane */ 268 physbase += CG4REG_OVERLAY; 269 } else { 270 /* enable plane */ 271 off -= 0x20000; 272 physbase += CG4REG_ENABLE; 273 } 274 } else { 275 /* pixel map */ 276 off -= 0x40000; 277 physbase += CG4REG_PIXMAP; 278 } 279 280 /* 281 * I turned on PMAP_NC here to disable the cache as I was 282 * getting horribly broken behaviour with it on. 283 */ 284 return ((physbase + off) | PMAP_NC); 285 } 286 287 /* 288 * Internal ioctl functions. 289 */ 290 291 /* FBIOGATTR: */ 292 static int cg4gattr(fb, fba) 293 struct fbdevice *fb; 294 struct fbgattr *fba; 295 { 296 297 fba->real_type = fb->fb_fbtype.fb_type; 298 fba->owner = 0; /* XXX - TIOCCONS stuff? */ 299 fba->fbtype = fb->fb_fbtype; 300 fba->sattr.flags = 0; 301 fba->sattr.emu_type = fb->fb_fbtype.fb_type; 302 fba->sattr.dev_specific[0] = -1; 303 fba->emu_types[0] = fb->fb_fbtype.fb_type; 304 fba->emu_types[1] = -1; 305 return (0); 306 } 307 308 /* FBIOGVIDEO: */ 309 static int cg4gvideo(fb, on) 310 struct fbdevice *fb; 311 int *on; 312 { 313 struct cg4_softc *sc = fb->fb_private; 314 315 *on = !sc->sc_blanked; 316 return (0); 317 } 318 319 /* FBIOSVIDEO: */ 320 static int cg4svideo(fb, on) 321 struct fbdevice *fb; 322 int *on; 323 { 324 struct cg4_softc *sc = fb->fb_private; 325 register volatile struct bt_regs *bt = sc->sc_bt; 326 327 if ((*on == 0) && (sc->sc_blanked == 0)) { 328 /* Turn OFF video (blank it). */ 329 bt->bt_addr = 0x06; /* command reg */ 330 bt->bt_ctrl = 0x70; /* overlay plane */ 331 bt->bt_addr = 0x04; /* read mask */ 332 bt->bt_ctrl = 0x00; /* color planes */ 333 /* 334 * Set color 0 to black -- note that this overwrites 335 * R of color 1. 336 */ 337 bt->bt_addr = 0; 338 bt->bt_cmap = 0; 339 340 sc->sc_blanked = 1; 341 } 342 343 if ((*on != 0) && (sc->sc_blanked != 0)) { 344 /* Turn video back ON (unblank). */ 345 sc->sc_blanked = 0; 346 347 /* restore color 0 (and R of color 1) */ 348 bt->bt_addr = 0; 349 bt->bt_cmap = sc->sc_cmap.cm_chip[0]; 350 351 /* restore read mask */ 352 bt->bt_addr = 0x06; /* command reg */ 353 bt->bt_ctrl = 0x73; /* overlay plane */ 354 bt->bt_addr = 0x04; /* read mask */ 355 bt->bt_ctrl = 0xff; /* color planes */ 356 } 357 return (0); 358 } 359 360 /* FBIOGETCMAP: */ 361 static int cg4getcmap(fb, cmap) 362 struct fbdevice *fb; 363 struct fbcmap *cmap; 364 { 365 struct cg4_softc *sc = fb->fb_private; 366 367 return (bt_getcmap(cmap, &sc->sc_cmap, 256)); 368 } 369 370 /* FBIOPUTCMAP: */ 371 static int cg4putcmap(fb, cmap) 372 struct fbdevice *fb; 373 struct fbcmap *cmap; 374 { 375 struct cg4_softc *sc = fb->fb_private; 376 int error; 377 378 /* copy to software map */ 379 error = bt_putcmap(cmap, &sc->sc_cmap, 256); 380 if (error == 0) { 381 /* now blast them into the chip */ 382 /* XXX should use retrace interrupt */ 383 cg4loadcmap(sc, cmap->index, cmap->count); 384 } 385 return (error); 386 } 387 388 /* 389 * Load a subset of the current (new) colormap into the Brooktree DAC. 390 */ 391 static void 392 cg4loadcmap(sc, start, ncolors) 393 struct cg4_softc *sc; 394 int start, ncolors; 395 { 396 volatile struct bt_regs *bt; 397 u_int *ip; 398 int count; 399 400 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 401 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 402 bt = sc->sc_bt; 403 bt->bt_addr = BT_D4M4(start); 404 while (--count >= 0) 405 bt->bt_cmap = *ip++; 406 } 407
Indexes created Mon Sep 29 21:09:56 GMT 2025