1 /* $NetBSD: bw2.c,v 1.17 2001/09/19 18:10:34 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 * @(#)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 cdev_decl(bw2); 76 77 /* per-display variables */ 78 struct bw2_softc { 79 struct device sc_dev; /* base device */ 80 struct fbdevice sc_fb; /* frame buffer device */ 81 int sc_phys; /* display RAM (phys addr) */ 82 /* If using overlay plane of something, it is... */ 83 int sc_ovtype; /* ... this type. */ 84 int sc_video_on; 85 }; 86 87 /* autoconfiguration driver */ 88 static void bw2attach __P((struct device *, struct device *, void *)); 89 static int bw2match __P((struct device *, struct cfdata *, void *)); 90 91 struct cfattach bwtwo_ca = { 92 sizeof(struct bw2_softc), bw2match, bw2attach 93 }; 94 95 extern struct cfdriver bwtwo_cd; 96 97 /* XXX we do not handle frame buffer interrupts */ 98 99 static int bw2gvideo __P((struct fbdevice *, void *)); 100 static int bw2svideo __P((struct fbdevice *, void *)); 101 102 static struct fbdriver bw2fbdriver = { 103 bw2open, bw2close, bw2mmap, 104 fb_noioctl, 105 bw2gvideo, bw2svideo, 106 fb_noioctl, fb_noioctl, }; 107 108 static int 109 bw2match(parent, cf, args) 110 struct device *parent; 111 struct cfdata *cf; 112 void *args; 113 { 114 struct confargs *ca = args; 115 int mid, p4id, peekval; 116 void *p4reg; 117 118 /* No default address support. */ 119 if (ca->ca_paddr == -1) 120 return (0); 121 122 /* 123 * Slight hack here: The low four bits of the 124 * config flags, if set, restrict the match to 125 * that machine "implementation" only. 126 */ 127 mid = cf->cf_flags & IDM_IMPL_MASK; 128 if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK))) 129 return (0); 130 131 /* 132 * Make sure something is there, and if so, 133 * see if it looks like a P4 register. 134 */ 135 p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr); 136 peekval = peek_long(p4reg); 137 p4id = (peekval == -1) ? 138 P4_NOTFOUND : fb_pfour_id(p4reg); 139 bus_tmapout(p4reg); 140 if (peekval == -1) 141 return (0); 142 143 /* 144 * The config flag 0x40 if set means we should match 145 * only on a CG? overlay plane. We can use only the 146 * CG4 and CG8, which both have a P4 register. 147 */ 148 if (cf->cf_flags & 0x40) { 149 switch (p4id) { 150 case P4_ID_COLOR8P1: 151 case P4_ID_COLOR24: 152 return (1); 153 case P4_NOTFOUND: 154 default: 155 return (0); 156 } 157 } 158 159 /* 160 * OK, we are expecting a plain old BW2, and 161 * there may or may not be a P4 register. 162 */ 163 switch (p4id) { 164 case P4_ID_BW: 165 case P4_NOTFOUND: 166 return (1); 167 default: 168 #ifdef DEBUG 169 printf("bwtwo at 0x%x match p4id=0x%x fails\n", 170 ca->ca_paddr, p4id & 0xFF); 171 #endif 172 } 173 174 return (0); 175 } 176 177 /* 178 * Attach a display. We need to notice if it is the console, too. 179 */ 180 static void 181 bw2attach(parent, self, args) 182 struct device *parent, *self; 183 void *args; 184 { 185 struct bw2_softc *sc = (struct bw2_softc *)self; 186 struct fbdevice *fb = &sc->sc_fb; 187 struct confargs *ca = args; 188 struct fbtype *fbt; 189 void *p4reg; 190 int p4id, tmp; 191 int pixeloffset; /* offset to framebuffer */ 192 193 fbt = &fb->fb_fbtype; 194 fbt->fb_type = FBTYPE_SUN2BW; 195 fbt->fb_width = 1152; /* default - see below */ 196 fbt->fb_height = 900; /* default - see below */ 197 fbt->fb_depth = 1; 198 fbt->fb_cmsize = 0; 199 fbt->fb_size = BW2_FBSIZE; /* default - see below */ 200 fb->fb_driver = &bw2fbdriver; 201 fb->fb_private = sc; 202 fb->fb_name = sc->sc_dev.dv_xname; 203 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 204 205 /* Set up default pixel offset. May be changed below. */ 206 pixeloffset = 0; 207 208 /* Does it have a P4 register? */ 209 p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4); 210 p4id = fb_pfour_id(p4reg); 211 if (p4id != P4_NOTFOUND) 212 fb->fb_pfour = p4reg; 213 else 214 bus_mapout(p4reg, 4); 215 216 switch (p4id) { 217 case P4_NOTFOUND: 218 pixeloffset = 0; 219 break; 220 221 case P4_ID_BW: 222 pixeloffset = P4_BW_OFF; 223 break; 224 225 default: 226 printf("%s: bad p4id=0x%x\n", fb->fb_name, p4id); 227 /* Must be some kinda color... */ 228 /* fall through */ 229 case P4_ID_COLOR8P1: 230 case P4_ID_COLOR24: 231 sc->sc_ovtype = p4id; 232 pixeloffset = P4_COLOR_OFF_OVERLAY; 233 break; 234 } 235 sc->sc_phys = ca->ca_paddr + pixeloffset; 236 237 /* 238 * Determine width and height as follows: 239 * If it has a P4 register, use that; 240 * else if unit==0, use the EEPROM size, 241 * else make our best guess. 242 */ 243 if (fb->fb_pfour) 244 fb_pfour_setsize(fb); 245 else if (sc->sc_dev.dv_unit == 0) 246 fb_eeprom_setsize(fb); 247 else { 248 /* Guess based on machine ID. */ 249 switch (cpu_machine_id) { 250 #ifdef _SUN3_ 251 case SUN3_MACH_60: 252 /* 253 * Only the model 60 can have hi-res. 254 * Look at the "resolution" jumper. 255 */ 256 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 257 if ((tmp != -1) && (tmp & 0x80) == 0) 258 goto high_res; 259 break; 260 261 case SUN3_MACH_260: 262 /* The Sun3/260 is ALWAYS high-resolution! */ 263 /* fall through */ 264 high_res: 265 fbt->fb_width = 1600; 266 fbt->fb_height = 1280; 267 fbt->fb_size = BW2_FBSIZE_HIRES; 268 break; 269 #endif /* SUN3 */ 270 271 default: 272 /* Leave the defaults set above. */ 273 break; 274 } 275 } 276 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 277 278 /* Make sure video is on. */ 279 tmp = 1; 280 bw2svideo(fb, &tmp); 281 282 /* Let /dev/fb know we are here. */ 283 fb_attach(fb, 1); 284 } 285 286 int 287 bw2open(dev, flags, mode, p) 288 dev_t dev; 289 int flags, mode; 290 struct proc *p; 291 { 292 int unit = minor(dev); 293 294 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 295 return (ENXIO); 296 return (0); 297 } 298 299 int 300 bw2close(dev, flags, mode, p) 301 dev_t dev; 302 int flags, mode; 303 struct proc *p; 304 { 305 306 return (0); 307 } 308 309 int 310 bw2ioctl(dev, cmd, data, flags, p) 311 dev_t dev; 312 u_long cmd; 313 caddr_t data; 314 int flags; 315 struct proc *p; 316 { 317 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 318 319 return (fbioctlfb(&sc->sc_fb, cmd, data)); 320 } 321 322 /* 323 * Return the address that would map the given device at the given 324 * offset, allowing for the given protection, or return -1 for error. 325 */ 326 paddr_t 327 bw2mmap(dev, off, prot) 328 dev_t dev; 329 off_t off; 330 int prot; 331 { 332 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 333 int size = sc->sc_fb.fb_fbtype.fb_size; 334 335 if (off & PGOFSET) 336 panic("bw2mmap"); 337 338 if ((off < 0) || (off >= size)) 339 return (-1); 340 341 /* 342 * I turned on PMAP_NC here to disable the cache as I was 343 * getting horribly broken behaviour without it. 344 */ 345 return ((sc->sc_phys + off) | PMAP_NC); 346 } 347 348 /* FBIOGVIDEO: */ 349 static int bw2gvideo(fb, data) 350 struct fbdevice *fb; 351 void *data; 352 { 353 struct bw2_softc *sc = fb->fb_private; 354 int *on = data; 355 356 *on = sc->sc_video_on; 357 return (0); 358 } 359 360 /* FBIOSVIDEO: */ 361 static int bw2svideo(fb, data) 362 struct fbdevice *fb; 363 void *data; 364 { 365 struct bw2_softc *sc = fb->fb_private; 366 int *on = data; 367 368 if (sc->sc_video_on == *on) 369 return (0); 370 sc->sc_video_on = *on; 371 372 if (fb->fb_pfour) 373 fb_pfour_set_video(fb, sc->sc_video_on); 374 else 375 enable_video(sc->sc_video_on); 376 377 return(0); 378 } 379 380