1 /* $NetBSD: bw2.c,v 1.23 2002/10/23 09:12:23 jdolecek 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 * @(#)bwtwo.c 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * black&white display (bw2) driver. 49 * 50 * Does not handle interrupts, even though they can occur. 51 */ 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/conf.h> 56 #include <sys/device.h> 57 #include <sys/ioctl.h> 58 #include <sys/malloc.h> 59 #include <sys/mman.h> 60 #include <sys/proc.h> 61 #include <sys/tty.h> 62 63 #include <uvm/uvm_extern.h> 64 65 #include <machine/autoconf.h> 66 #include <machine/cpu.h> 67 #include <dev/sun/fbio.h> 68 #include <machine/idprom.h> 69 #include <machine/pmap.h> 70 71 #include <sun3/dev/fbvar.h> 72 #include <sun3/dev/bw2reg.h> 73 #include <sun3/dev/p4reg.h> 74 75 /* per-display variables */ 76 struct bw2_softc { 77 struct device sc_dev; /* base device */ 78 struct fbdevice sc_fb; /* frame buffer device */ 79 int sc_phys; /* display RAM (phys addr) */ 80 /* If using overlay plane of something, it is... */ 81 int sc_ovtype; /* ... this type. */ 82 int sc_video_on; 83 }; 84 85 /* autoconfiguration driver */ 86 static void bw2attach __P((struct device *, struct device *, void *)); 87 static int bw2match __P((struct device *, struct cfdata *, void *)); 88 89 CFATTACH_DECL(bwtwo, sizeof(struct bw2_softc), 90 bw2match, bw2attach, NULL, NULL); 91 92 extern struct cfdriver bwtwo_cd; 93 94 dev_type_open(bw2open); 95 dev_type_ioctl(bw2ioctl); 96 dev_type_mmap(bw2mmap); 97 98 const struct cdevsw bwtwo_cdevsw = { 99 bw2open, nullclose, noread, nowrite, bw2ioctl, 100 nostop, notty, nopoll, bw2mmap, nokqfilter, 101 }; 102 103 /* XXX we do not handle frame buffer interrupts */ 104 105 static int bw2gvideo __P((struct fbdevice *, void *)); 106 static int bw2svideo __P((struct fbdevice *, void *)); 107 108 static struct fbdriver bw2fbdriver = { 109 bw2open, nullclose, bw2mmap, nokqfilter, 110 fb_noioctl, 111 bw2gvideo, bw2svideo, 112 fb_noioctl, fb_noioctl, }; 113 114 static int 115 bw2match(parent, cf, args) 116 struct device *parent; 117 struct cfdata *cf; 118 void *args; 119 { 120 struct confargs *ca = args; 121 int mid, p4id, peekval; 122 void *p4reg; 123 124 /* No default address support. */ 125 if (ca->ca_paddr == -1) 126 return (0); 127 128 /* 129 * Slight hack here: The low four bits of the 130 * config flags, if set, restrict the match to 131 * that machine "implementation" only. 132 */ 133 mid = cf->cf_flags & IDM_IMPL_MASK; 134 if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK))) 135 return (0); 136 137 /* 138 * Make sure something is there, and if so, 139 * see if it looks like a P4 register. 140 */ 141 p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr); 142 peekval = peek_long(p4reg); 143 p4id = (peekval == -1) ? 144 P4_NOTFOUND : fb_pfour_id(p4reg); 145 bus_tmapout(p4reg); 146 if (peekval == -1) 147 return (0); 148 149 /* 150 * The config flag 0x40 if set means we should match 151 * only on a CG? overlay plane. We can use only the 152 * CG4 and CG8, which both have a P4 register. 153 */ 154 if (cf->cf_flags & 0x40) { 155 switch (p4id) { 156 case P4_ID_COLOR8P1: 157 case P4_ID_COLOR24: 158 return (1); 159 case P4_NOTFOUND: 160 default: 161 return (0); 162 } 163 } 164 165 /* 166 * OK, we are expecting a plain old BW2, and 167 * there may or may not be a P4 register. 168 */ 169 switch (p4id) { 170 case P4_ID_BW: 171 case P4_NOTFOUND: 172 return (1); 173 default: 174 #ifdef DEBUG 175 printf("bwtwo at 0x%x match p4id=0x%x fails\n", 176 ca->ca_paddr, p4id & 0xFF); 177 #endif 178 break; 179 } 180 181 return (0); 182 } 183 184 /* 185 * Attach a display. We need to notice if it is the console, too. 186 */ 187 static void 188 bw2attach(parent, self, args) 189 struct device *parent, *self; 190 void *args; 191 { 192 struct bw2_softc *sc = (struct bw2_softc *)self; 193 struct fbdevice *fb = &sc->sc_fb; 194 struct confargs *ca = args; 195 struct fbtype *fbt; 196 void *p4reg; 197 int p4id, tmp; 198 int pixeloffset; /* offset to framebuffer */ 199 200 fbt = &fb->fb_fbtype; 201 fbt->fb_type = FBTYPE_SUN2BW; 202 fbt->fb_width = 1152; /* default - see below */ 203 fbt->fb_height = 900; /* default - see below */ 204 fbt->fb_depth = 1; 205 fbt->fb_cmsize = 0; 206 fbt->fb_size = BW2_FBSIZE; /* default - see below */ 207 fb->fb_driver = &bw2fbdriver; 208 fb->fb_private = sc; 209 fb->fb_name = sc->sc_dev.dv_xname; 210 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 211 212 /* Set up default pixel offset. May be changed below. */ 213 pixeloffset = 0; 214 215 /* Does it have a P4 register? */ 216 p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4); 217 p4id = fb_pfour_id(p4reg); 218 if (p4id != P4_NOTFOUND) 219 fb->fb_pfour = p4reg; 220 else 221 bus_mapout(p4reg, 4); 222 223 switch (p4id) { 224 case P4_NOTFOUND: 225 pixeloffset = 0; 226 break; 227 228 case P4_ID_BW: 229 pixeloffset = P4_BW_OFF; 230 break; 231 232 default: 233 printf("%s: bad p4id=0x%x\n", fb->fb_name, p4id); 234 /* Must be some kinda color... */ 235 /* fall through */ 236 case P4_ID_COLOR8P1: 237 case P4_ID_COLOR24: 238 sc->sc_ovtype = p4id; 239 pixeloffset = P4_COLOR_OFF_OVERLAY; 240 break; 241 } 242 sc->sc_phys = ca->ca_paddr + pixeloffset; 243 244 /* 245 * Determine width and height as follows: 246 * If it has a P4 register, use that; 247 * else if unit==0, use the EEPROM size, 248 * else make our best guess. 249 */ 250 if (fb->fb_pfour) 251 fb_pfour_setsize(fb); 252 else if (sc->sc_dev.dv_unit == 0) 253 fb_eeprom_setsize(fb); 254 else { 255 /* Guess based on machine ID. */ 256 switch (cpu_machine_id) { 257 #ifdef _SUN3_ 258 case SUN3_MACH_60: 259 /* 260 * Only the model 60 can have hi-res. 261 * Look at the "resolution" jumper. 262 */ 263 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 264 if ((tmp != -1) && (tmp & 0x80) == 0) 265 goto high_res; 266 break; 267 268 case SUN3_MACH_260: 269 /* The Sun3/260 is ALWAYS high-resolution! */ 270 /* fall through */ 271 high_res: 272 fbt->fb_width = 1600; 273 fbt->fb_height = 1280; 274 fbt->fb_size = BW2_FBSIZE_HIRES; 275 break; 276 #endif /* SUN3 */ 277 278 default: 279 /* Leave the defaults set above. */ 280 break; 281 } 282 } 283 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 284 285 /* Make sure video is on. */ 286 tmp = 1; 287 bw2svideo(fb, &tmp); 288 289 /* Let /dev/fb know we are here. */ 290 fb_attach(fb, 1); 291 } 292 293 int 294 bw2open(dev, flags, mode, p) 295 dev_t dev; 296 int flags, mode; 297 struct proc *p; 298 { 299 int unit = minor(dev); 300 301 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 302 return (ENXIO); 303 return (0); 304 } 305 306 int 307 bw2ioctl(dev, cmd, data, flags, p) 308 dev_t dev; 309 u_long cmd; 310 caddr_t data; 311 int flags; 312 struct proc *p; 313 { 314 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 315 316 return (fbioctlfb(&sc->sc_fb, cmd, data)); 317 } 318 319 /* 320 * Return the address that would map the given device at the given 321 * offset, allowing for the given protection, or return -1 for error. 322 */ 323 paddr_t 324 bw2mmap(dev, off, prot) 325 dev_t dev; 326 off_t off; 327 int prot; 328 { 329 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 330 int size = sc->sc_fb.fb_fbtype.fb_size; 331 332 if (off & PGOFSET) 333 panic("bw2mmap"); 334 335 if ((off < 0) || (off >= size)) 336 return (-1); 337 338 /* 339 * I turned on PMAP_NC here to disable the cache as I was 340 * getting horribly broken behaviour without it. 341 */ 342 return ((sc->sc_phys + off) | PMAP_NC); 343 } 344 345 /* FBIOGVIDEO: */ 346 static int bw2gvideo(fb, data) 347 struct fbdevice *fb; 348 void *data; 349 { 350 struct bw2_softc *sc = fb->fb_private; 351 int *on = data; 352 353 *on = sc->sc_video_on; 354 return (0); 355 } 356 357 /* FBIOSVIDEO: */ 358 static int bw2svideo(fb, data) 359 struct fbdevice *fb; 360 void *data; 361 { 362 struct bw2_softc *sc = fb->fb_private; 363 int *on = data; 364 365 if (sc->sc_video_on == *on) 366 return (0); 367 sc->sc_video_on = *on; 368 369 if (fb->fb_pfour) 370 fb_pfour_set_video(fb, sc->sc_video_on); 371 else 372 enable_video(sc->sc_video_on); 373 374 return(0); 375 } 376 377