cg4.c revision 1.8
1 /* $NetBSD: cg4.c,v 1.8 1996/10/09 00:15:18 thorpej 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 cfattach cgfour_ca = { 91 sizeof(struct cg4_softc), cg4match, cg4attach 92 }; 93 94 struct cfdriver cgfour_cd = { 95 NULL, "cgfour", DV_DULL 96 }; 97 98 /* frame buffer generic driver */ 99 int cg4open(), cg4close(), cg4mmap(); 100 101 static int cg4gattr __P((struct fbdevice *, struct fbgattr *)); 102 static int cg4gvideo __P((struct fbdevice *, int *)); 103 static int cg4svideo __P((struct fbdevice *, int *)); 104 static int cg4getcmap __P((struct fbdevice *, struct fbcmap *)); 105 static int cg4putcmap __P((struct fbdevice *, struct fbcmap *)); 106 107 static struct fbdriver cg4fbdriver = { 108 cg4open, cg4close, cg4mmap, cg4gattr, 109 cg4gvideo, cg4svideo, 110 cg4getcmap, cg4putcmap }; 111 112 static void cg4loadcmap __P((struct cg4_softc *, int, int)); 113 114 /* 115 * Match a cg4. 116 */ 117 static int 118 cg4match(parent, vcf, args) 119 struct device *parent; 120 void *vcf, *args; 121 { 122 struct confargs *ca = args; 123 int paddr, x; 124 125 /* XXX - Huge hack due to lack of probe info... */ 126 switch (cpu_machine_id) { 127 /* Machines that might have a cg4 (gag). */ 128 case SUN3_MACH_50: 129 case SUN3_MACH_60: 130 case SUN3_MACH_110: 131 break; 132 default: 133 return (0); 134 } 135 136 if (ca->ca_paddr == -1) 137 ca->ca_paddr = 0xFF200000; 138 139 paddr = ca->ca_paddr; 140 x = bus_peek(ca->ca_bustype, paddr, 1); 141 if (x == -1) 142 return (0); 143 144 paddr += CG4REG_PIXMAP; 145 x = bus_peek(ca->ca_bustype, paddr, 1); 146 if (x == -1) 147 return (0); 148 149 return (1); 150 } 151 152 /* 153 * Attach a display. We need to notice if it is the console, too. 154 */ 155 static void 156 cg4attach(parent, self, args) 157 struct device *parent, *self; 158 void *args; 159 { 160 struct cg4_softc *sc = (struct cg4_softc *)self; 161 struct fbdevice *fb = &sc->sc_fb; 162 struct confargs *ca = args; 163 struct fbtype *fbt; 164 volatile struct bt_regs *bt; 165 int i; 166 167 fb->fb_driver = &cg4fbdriver; 168 fb->fb_private = sc; 169 fb->fb_name = sc->sc_dev.dv_xname; 170 171 fbt = &fb->fb_fbtype; 172 fbt->fb_type = FBTYPE_SUN4COLOR; 173 fbt->fb_depth = 8; 174 fbt->fb_cmsize = 256; 175 176 fbt->fb_width = 1152; 177 fbt->fb_height = 900; 178 fbt->fb_size = CG4_MMAP_SIZE; 179 180 sc->sc_phys = ca->ca_paddr; 181 sc->sc_bt = bt = (volatile struct bt_regs *) 182 bus_mapin(ca->ca_bustype, ca->ca_paddr, 183 sizeof(struct bt_regs *)); 184 185 /* grab initial (current) color map */ 186 bt->bt_addr = 0; 187 for (i = 0; i < (256 * 3 / 4); i++) 188 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 189 190 /* 191 * BT458 chip initialization as described in Brooktree's 192 * 1993 Graphics and Imaging Product Databook (DB004-1/93). 193 */ 194 bt->bt_addr = 0x04; /* select read mask register */ 195 bt->bt_ctrl = 0xff; /* all planes on */ 196 bt->bt_addr = 0x05; /* select blink mask register */ 197 bt->bt_ctrl = 0x00; /* all planes non-blinking */ 198 bt->bt_addr = 0x06; /* select command register */ 199 bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */ 200 bt->bt_addr = 0x07; /* select test register */ 201 bt->bt_ctrl = 0x00; /* set test mode */ 202 203 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 204 fb_attach(fb, 4); 205 } 206 207 int 208 cg4open(dev, flags, mode, p) 209 dev_t dev; 210 int flags, mode; 211 struct proc *p; 212 { 213 int unit = minor(dev); 214 215 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 216 return (ENXIO); 217 return (0); 218 } 219 220 int 221 cg4close(dev, flags, mode, p) 222 dev_t dev; 223 int flags, mode; 224 struct proc *p; 225 { 226 227 return (0); 228 } 229 230 int 231 cg4ioctl(dev, cmd, data, flags, p) 232 dev_t dev; 233 u_long cmd; 234 caddr_t data; 235 int flags; 236 struct proc *p; 237 { 238 struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 239 240 return (fbioctlfb(&sc->sc_fb, cmd, data)); 241 } 242 243 /* 244 * Return the address that would map the given device at the given 245 * offset, allowing for the given protection, or return -1 for error. 246 * 247 * X11 expects its mmap'd region to look like this: 248 * 128k overlay memory 249 * 128k overlay-enable bitmap 250 * 1024k color memory 251 * 252 * The hardware really looks like this (starting at ca_paddr) 253 * 4 bytes Brooktree DAC registers 254 * 2MB-4 gap 255 * 128k overlay memory 256 * 1920k gap 257 * 128k overlay-enable bitmap 258 * 1920k gap 259 * 1024k color memory 260 */ 261 int 262 cg4mmap(dev, off, prot) 263 dev_t dev; 264 register int off; 265 int prot; 266 { 267 struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 268 register int physbase; 269 270 if (off & PGOFSET) 271 panic("cg4mmap"); 272 273 if ((unsigned)off >= CG4_MMAP_SIZE) 274 return (-1); 275 276 physbase = sc->sc_phys; 277 if (off < 0x40000) { 278 if (off < 0x20000) { 279 /* overlay plane */ 280 physbase += CG4REG_OVERLAY; 281 } else { 282 /* enable plane */ 283 off -= 0x20000; 284 physbase += CG4REG_ENABLE; 285 } 286 } else { 287 /* pixel map */ 288 off -= 0x40000; 289 physbase += CG4REG_PIXMAP; 290 } 291 292 /* 293 * I turned on PMAP_NC here to disable the cache as I was 294 * getting horribly broken behaviour with it on. 295 */ 296 return ((physbase + off) | PMAP_NC); 297 } 298 299 /* 300 * Internal ioctl functions. 301 */ 302 303 /* FBIOGATTR: */ 304 static int cg4gattr(fb, fba) 305 struct fbdevice *fb; 306 struct fbgattr *fba; 307 { 308 309 fba->real_type = fb->fb_fbtype.fb_type; 310 fba->owner = 0; /* XXX - TIOCCONS stuff? */ 311 fba->fbtype = fb->fb_fbtype; 312 fba->sattr.flags = 0; 313 fba->sattr.emu_type = fb->fb_fbtype.fb_type; 314 fba->sattr.dev_specific[0] = -1; 315 fba->emu_types[0] = fb->fb_fbtype.fb_type; 316 fba->emu_types[1] = -1; 317 return (0); 318 } 319 320 /* FBIOGVIDEO: */ 321 static int cg4gvideo(fb, on) 322 struct fbdevice *fb; 323 int *on; 324 { 325 struct cg4_softc *sc = fb->fb_private; 326 327 *on = !sc->sc_blanked; 328 return (0); 329 } 330 331 /* FBIOSVIDEO: */ 332 static int cg4svideo(fb, on) 333 struct fbdevice *fb; 334 int *on; 335 { 336 struct cg4_softc *sc = fb->fb_private; 337 register volatile struct bt_regs *bt = sc->sc_bt; 338 339 if ((*on == 0) && (sc->sc_blanked == 0)) { 340 /* Turn OFF video (blank it). */ 341 bt->bt_addr = 0x06; /* command reg */ 342 bt->bt_ctrl = 0x70; /* overlay plane */ 343 bt->bt_addr = 0x04; /* read mask */ 344 bt->bt_ctrl = 0x00; /* color planes */ 345 /* 346 * Set color 0 to black -- note that this overwrites 347 * R of color 1. 348 */ 349 bt->bt_addr = 0; 350 bt->bt_cmap = 0; 351 352 sc->sc_blanked = 1; 353 } 354 355 if ((*on != 0) && (sc->sc_blanked != 0)) { 356 /* Turn video back ON (unblank). */ 357 sc->sc_blanked = 0; 358 359 /* restore color 0 (and R of color 1) */ 360 bt->bt_addr = 0; 361 bt->bt_cmap = sc->sc_cmap.cm_chip[0]; 362 363 /* restore read mask */ 364 bt->bt_addr = 0x06; /* command reg */ 365 bt->bt_ctrl = 0x73; /* overlay plane */ 366 bt->bt_addr = 0x04; /* read mask */ 367 bt->bt_ctrl = 0xff; /* color planes */ 368 } 369 return (0); 370 } 371 372 /* FBIOGETCMAP: */ 373 static int cg4getcmap(fb, cmap) 374 struct fbdevice *fb; 375 struct fbcmap *cmap; 376 { 377 struct cg4_softc *sc = fb->fb_private; 378 379 return (bt_getcmap(cmap, &sc->sc_cmap, 256)); 380 } 381 382 /* FBIOPUTCMAP: */ 383 static int cg4putcmap(fb, cmap) 384 struct fbdevice *fb; 385 struct fbcmap *cmap; 386 { 387 struct cg4_softc *sc = fb->fb_private; 388 int error; 389 390 /* copy to software map */ 391 error = bt_putcmap(cmap, &sc->sc_cmap, 256); 392 if (error == 0) { 393 /* now blast them into the chip */ 394 /* XXX should use retrace interrupt */ 395 cg4loadcmap(sc, cmap->index, cmap->count); 396 } 397 return (error); 398 } 399 400 /* 401 * Load a subset of the current (new) colormap into the Brooktree DAC. 402 */ 403 static void 404 cg4loadcmap(sc, start, ncolors) 405 struct cg4_softc *sc; 406 int start, ncolors; 407 { 408 volatile struct bt_regs *bt; 409 u_int *ip; 410 int count; 411 412 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 413 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 414 bt = sc->sc_bt; 415 bt->bt_addr = BT_D4M4(start); 416 while (--count >= 0) 417 bt->bt_cmap = *ip++; 418 } 419
Indexes created Tue Sep 30 07:10:03 GMT 2025