1 /* $NetBSD: bw2.c,v 1.19 2002/09/06 13:18:43 gehenna 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 struct cfattach bwtwo_ca = { 90 sizeof(struct bw2_softc), bw2match, bw2attach 91 }; 92 93 extern struct cfdriver bwtwo_cd; 94 95 dev_type_open(bw2open); 96 dev_type_ioctl(bw2ioctl); 97 dev_type_mmap(bw2mmap); 98 99 const struct cdevsw bwtwo_cdevsw = { 100 bw2open, nullclose, noread, nowrite, bw2ioctl, 101 nostop, notty, nopoll, bw2mmap, 102 }; 103 104 /* XXX we do not handle frame buffer interrupts */ 105 106 static int bw2gvideo __P((struct fbdevice *, void *)); 107 static int bw2svideo __P((struct fbdevice *, void *)); 108 109 static struct fbdriver bw2fbdriver = { 110 bw2open, nullclose, bw2mmap, 111 fb_noioctl, 112 bw2gvideo, bw2svideo, 113 fb_noioctl, fb_noioctl, }; 114 115 static int 116 bw2match(parent, cf, args) 117 struct device *parent; 118 struct cfdata *cf; 119 void *args; 120 { 121 struct confargs *ca = args; 122 int mid, p4id, peekval; 123 void *p4reg; 124 125 /* No default address support. */ 126 if (ca->ca_paddr == -1) 127 return (0); 128 129 /* 130 * Slight hack here: The low four bits of the 131 * config flags, if set, restrict the match to 132 * that machine "implementation" only. 133 */ 134 mid = cf->cf_flags & IDM_IMPL_MASK; 135 if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK))) 136 return (0); 137 138 /* 139 * Make sure something is there, and if so, 140 * see if it looks like a P4 register. 141 */ 142 p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr); 143 peekval = peek_long(p4reg); 144 p4id = (peekval == -1) ? 145 P4_NOTFOUND : fb_pfour_id(p4reg); 146 bus_tmapout(p4reg); 147 if (peekval == -1) 148 return (0); 149 150 /* 151 * The config flag 0x40 if set means we should match 152 * only on a CG? overlay plane. We can use only the 153 * CG4 and CG8, which both have a P4 register. 154 */ 155 if (cf->cf_flags & 0x40) { 156 switch (p4id) { 157 case P4_ID_COLOR8P1: 158 case P4_ID_COLOR24: 159 return (1); 160 case P4_NOTFOUND: 161 default: 162 return (0); 163 } 164 } 165 166 /* 167 * OK, we are expecting a plain old BW2, and 168 * there may or may not be a P4 register. 169 */ 170 switch (p4id) { 171 case P4_ID_BW: 172 case P4_NOTFOUND: 173 return (1); 174 default: 175 #ifdef DEBUG 176 printf("bwtwo at 0x%x match p4id=0x%x fails\n", 177 ca->ca_paddr, p4id & 0xFF); 178 #endif 179 break; 180 } 181 182 return (0); 183 } 184 185 /* 186 * Attach a display. We need to notice if it is the console, too. 187 */ 188 static void 189 bw2attach(parent, self, args) 190 struct device *parent, *self; 191 void *args; 192 { 193 struct bw2_softc *sc = (struct bw2_softc *)self; 194 struct fbdevice *fb = &sc->sc_fb; 195 struct confargs *ca = args; 196 struct fbtype *fbt; 197 void *p4reg; 198 int p4id, tmp; 199 int pixeloffset; /* offset to framebuffer */ 200 201 fbt = &fb->fb_fbtype; 202 fbt->fb_type = FBTYPE_SUN2BW; 203 fbt->fb_width = 1152; /* default - see below */ 204 fbt->fb_height = 900; /* default - see below */ 205 fbt->fb_depth = 1; 206 fbt->fb_cmsize = 0; 207 fbt->fb_size = BW2_FBSIZE; /* default - see below */ 208 fb->fb_driver = &bw2fbdriver; 209 fb->fb_private = sc; 210 fb->fb_name = sc->sc_dev.dv_xname; 211 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 212 213 /* Set up default pixel offset. May be changed below. */ 214 pixeloffset = 0; 215 216 /* Does it have a P4 register? */ 217 p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4); 218 p4id = fb_pfour_id(p4reg); 219 if (p4id != P4_NOTFOUND) 220 fb->fb_pfour = p4reg; 221 else 222 bus_mapout(p4reg, 4); 223 224 switch (p4id) { 225 case P4_NOTFOUND: 226 pixeloffset = 0; 227 break; 228 229 case P4_ID_BW: 230 pixeloffset = P4_BW_OFF; 231 break; 232 233 default: 234 printf("%s: bad p4id=0x%x\n", fb->fb_name, p4id); 235 /* Must be some kinda color... */ 236 /* fall through */ 237 case P4_ID_COLOR8P1: 238 case P4_ID_COLOR24: 239 sc->sc_ovtype = p4id; 240 pixeloffset = P4_COLOR_OFF_OVERLAY; 241 break; 242 } 243 sc->sc_phys = ca->ca_paddr + pixeloffset; 244 245 /* 246 * Determine width and height as follows: 247 * If it has a P4 register, use that; 248 * else if unit==0, use the EEPROM size, 249 * else make our best guess. 250 */ 251 if (fb->fb_pfour) 252 fb_pfour_setsize(fb); 253 else if (sc->sc_dev.dv_unit == 0) 254 fb_eeprom_setsize(fb); 255 else { 256 /* Guess based on machine ID. */ 257 switch (cpu_machine_id) { 258 #ifdef _SUN3_ 259 case SUN3_MACH_60: 260 /* 261 * Only the model 60 can have hi-res. 262 * Look at the "resolution" jumper. 263 */ 264 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 265 if ((tmp != -1) && (tmp & 0x80) == 0) 266 goto high_res; 267 break; 268 269 case SUN3_MACH_260: 270 /* The Sun3/260 is ALWAYS high-resolution! */ 271 /* fall through */ 272 high_res: 273 fbt->fb_width = 1600; 274 fbt->fb_height = 1280; 275 fbt->fb_size = BW2_FBSIZE_HIRES; 276 break; 277 #endif /* SUN3 */ 278 279 default: 280 /* Leave the defaults set above. */ 281 break; 282 } 283 } 284 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 285 286 /* Make sure video is on. */ 287 tmp = 1; 288 bw2svideo(fb, &tmp); 289 290 /* Let /dev/fb know we are here. */ 291 fb_attach(fb, 1); 292 } 293 294 int 295 bw2open(dev, flags, mode, p) 296 dev_t dev; 297 int flags, mode; 298 struct proc *p; 299 { 300 int unit = minor(dev); 301 302 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 303 return (ENXIO); 304 return (0); 305 } 306 307 int 308 bw2ioctl(dev, cmd, data, flags, p) 309 dev_t dev; 310 u_long cmd; 311 caddr_t data; 312 int flags; 313 struct proc *p; 314 { 315 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 316 317 return (fbioctlfb(&sc->sc_fb, cmd, data)); 318 } 319 320 /* 321 * Return the address that would map the given device at the given 322 * offset, allowing for the given protection, or return -1 for error. 323 */ 324 paddr_t 325 bw2mmap(dev, off, prot) 326 dev_t dev; 327 off_t off; 328 int prot; 329 { 330 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 331 int size = sc->sc_fb.fb_fbtype.fb_size; 332 333 if (off & PGOFSET) 334 panic("bw2mmap"); 335 336 if ((off < 0) || (off >= size)) 337 return (-1); 338 339 /* 340 * I turned on PMAP_NC here to disable the cache as I was 341 * getting horribly broken behaviour without it. 342 */ 343 return ((sc->sc_phys + off) | PMAP_NC); 344 } 345 346 /* FBIOGVIDEO: */ 347 static int bw2gvideo(fb, data) 348 struct fbdevice *fb; 349 void *data; 350 { 351 struct bw2_softc *sc = fb->fb_private; 352 int *on = data; 353 354 *on = sc->sc_video_on; 355 return (0); 356 } 357 358 /* FBIOSVIDEO: */ 359 static int bw2svideo(fb, data) 360 struct fbdevice *fb; 361 void *data; 362 { 363 struct bw2_softc *sc = fb->fb_private; 364 int *on = data; 365 366 if (sc->sc_video_on == *on) 367 return (0); 368 sc->sc_video_on = *on; 369 370 if (fb->fb_pfour) 371 fb_pfour_set_video(fb, sc->sc_video_on); 372 else 373 enable_video(sc->sc_video_on); 374 375 return(0); 376 } 377 378