bw2.c revision 1.31
1 /* $NetBSD: bw2.c,v 1.31 2007/03/04 06:00:52 christos 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. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)bwtwo.c 8.1 (Berkeley) 6/11/93 41 */ 42 43 /* 44 * black&white display (bw2) driver. 45 * 46 * Does not handle interrupts, even though they can occur. 47 */ 48 49 #include <sys/cdefs.h> 50 __KERNEL_RCSID(0, "$NetBSD: bw2.c,v 1.31 2007/03/04 06:00:52 christos Exp $"); 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/conf.h> 55 #include <sys/device.h> 56 #include <sys/ioctl.h> 57 #include <sys/malloc.h> 58 #include <sys/mman.h> 59 #include <sys/proc.h> 60 #include <sys/tty.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <machine/autoconf.h> 65 #include <machine/cpu.h> 66 #include <dev/sun/fbio.h> 67 #include <machine/idprom.h> 68 #include <machine/pmap.h> 69 70 #include <sun3/dev/fbvar.h> 71 #include <sun3/dev/bw2reg.h> 72 #include <sun3/dev/p4reg.h> 73 74 /* per-display variables */ 75 struct bw2_softc { 76 struct device sc_dev; /* base device */ 77 struct fbdevice sc_fb; /* frame buffer device */ 78 int sc_phys; /* display RAM (phys addr) */ 79 /* If using overlay plane of something, it is... */ 80 int sc_ovtype; /* ... this type. */ 81 int sc_video_on; 82 }; 83 84 /* autoconfiguration driver */ 85 static void bw2attach(struct device *, struct device *, void *); 86 static int bw2match(struct device *, struct cfdata *, void *); 87 88 CFATTACH_DECL(bwtwo, sizeof(struct bw2_softc), 89 bw2match, bw2attach, NULL, NULL); 90 91 extern struct cfdriver bwtwo_cd; 92 93 dev_type_open(bw2open); 94 dev_type_ioctl(bw2ioctl); 95 dev_type_mmap(bw2mmap); 96 97 const struct cdevsw bwtwo_cdevsw = { 98 bw2open, nullclose, noread, nowrite, bw2ioctl, 99 nostop, notty, nopoll, bw2mmap, nokqfilter, 100 }; 101 102 /* XXX we do not handle frame buffer interrupts */ 103 104 static int bw2gvideo(struct fbdevice *, void *); 105 static int bw2svideo(struct fbdevice *, void *); 106 107 static struct fbdriver bw2fbdriver = { 108 bw2open, nullclose, bw2mmap, nokqfilter, 109 fb_noioctl, 110 bw2gvideo, bw2svideo, 111 fb_noioctl, fb_noioctl, }; 112 113 static int 114 bw2match(struct device *parent, struct cfdata *cf, void *args) 115 { 116 struct confargs *ca = args; 117 int mid, p4id, peekval; 118 void *p4reg; 119 120 /* No default address support. */ 121 if (ca->ca_paddr == -1) 122 return (0); 123 124 /* 125 * Slight hack here: The low four bits of the 126 * config flags, if set, restrict the match to 127 * that machine "implementation" only. 128 */ 129 mid = cf->cf_flags & IDM_IMPL_MASK; 130 if (mid && (mid != (cpu_machine_id & IDM_IMPL_MASK))) 131 return (0); 132 133 /* 134 * Make sure something is there, and if so, 135 * see if it looks like a P4 register. 136 */ 137 p4reg = bus_tmapin(ca->ca_bustype, ca->ca_paddr); 138 peekval = peek_long(p4reg); 139 p4id = (peekval == -1) ? 140 P4_NOTFOUND : fb_pfour_id(p4reg); 141 bus_tmapout(p4reg); 142 if (peekval == -1) 143 return (0); 144 145 /* 146 * The config flag 0x40 if set means we should match 147 * only on a CG? overlay plane. We can use only the 148 * CG4 and CG8, which both have a P4 register. 149 */ 150 if (cf->cf_flags & 0x40) { 151 switch (p4id) { 152 case P4_ID_COLOR8P1: 153 case P4_ID_COLOR24: 154 return (1); 155 case P4_NOTFOUND: 156 default: 157 return (0); 158 } 159 } 160 161 /* 162 * OK, we are expecting a plain old BW2, and 163 * there may or may not be a P4 register. 164 */ 165 switch (p4id) { 166 case P4_ID_BW: 167 case P4_NOTFOUND: 168 return (1); 169 default: 170 #ifdef DEBUG 171 printf("bwtwo at 0x%x match p4id=0x%x fails\n", 172 ca->ca_paddr, p4id & 0xFF); 173 #endif 174 break; 175 } 176 177 return (0); 178 } 179 180 /* 181 * Attach a display. We need to notice if it is the console, too. 182 */ 183 static void 184 bw2attach(struct device *parent, struct device *self, void *args) 185 { 186 struct bw2_softc *sc = (struct bw2_softc *)self; 187 struct fbdevice *fb = &sc->sc_fb; 188 struct confargs *ca = args; 189 struct fbtype *fbt; 190 void *p4reg; 191 int p4id, tmp; 192 int pixeloffset; /* offset to framebuffer */ 193 194 fbt = &fb->fb_fbtype; 195 fbt->fb_type = FBTYPE_SUN2BW; 196 fbt->fb_width = 1152; /* default - see below */ 197 fbt->fb_height = 900; /* default - see below */ 198 fbt->fb_depth = 1; 199 fbt->fb_cmsize = 0; 200 fbt->fb_size = BW2_FBSIZE; /* default - see below */ 201 fb->fb_driver = &bw2fbdriver; 202 fb->fb_private = sc; 203 fb->fb_name = sc->sc_dev.dv_xname; 204 fb->fb_flags = device_cfdata(&sc->sc_dev)->cf_flags; 205 206 /* Set up default pixel offset. May be changed below. */ 207 pixeloffset = 0; 208 209 /* Does it have a P4 register? */ 210 p4reg = bus_mapin(ca->ca_bustype, ca->ca_paddr, 4); 211 p4id = fb_pfour_id(p4reg); 212 if (p4id != P4_NOTFOUND) 213 fb->fb_pfour = p4reg; 214 else 215 bus_mapout(p4reg, 4); 216 217 switch (p4id) { 218 case P4_NOTFOUND: 219 pixeloffset = 0; 220 break; 221 222 case P4_ID_BW: 223 pixeloffset = P4_BW_OFF; 224 break; 225 226 default: 227 printf("%s: bad p4id=0x%x\n", fb->fb_name, p4id); 228 /* Must be some kinda color... */ 229 /* fall through */ 230 case P4_ID_COLOR8P1: 231 case P4_ID_COLOR24: 232 sc->sc_ovtype = p4id; 233 pixeloffset = P4_COLOR_OFF_OVERLAY; 234 break; 235 } 236 sc->sc_phys = ca->ca_paddr + pixeloffset; 237 238 /* 239 * Determine width and height as follows: 240 * If it has a P4 register, use that; 241 * else if unit==0, use the EEPROM size, 242 * else make our best guess. 243 */ 244 if (fb->fb_pfour) 245 fb_pfour_setsize(fb); 246 /* XXX device_unit() abuse */ 247 else if (device_unit(&sc->sc_dev) == 0) 248 fb_eeprom_setsize(fb); 249 else { 250 /* Guess based on machine ID. */ 251 switch (cpu_machine_id) { 252 #ifdef _SUN3_ 253 case ID_SUN3_60: 254 /* 255 * Only the model 60 can have hi-res. 256 * Look at the "resolution" jumper. 257 */ 258 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 259 if ((tmp != -1) && (tmp & 0x80) == 0) 260 goto high_res; 261 break; 262 263 case ID_SUN3_260: 264 /* The Sun3/260 is ALWAYS high-resolution! */ 265 /* fall through */ 266 high_res: 267 fbt->fb_width = 1600; 268 fbt->fb_height = 1280; 269 fbt->fb_size = BW2_FBSIZE_HIRES; 270 break; 271 #endif /* SUN3 */ 272 273 default: 274 /* Leave the defaults set above. */ 275 break; 276 } 277 } 278 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 279 280 /* Make sure video is on. */ 281 tmp = 1; 282 bw2svideo(fb, &tmp); 283 284 /* Let /dev/fb know we are here. */ 285 fb_attach(fb, 1); 286 } 287 288 int 289 bw2open(dev_t dev, int flags, int mode, struct lwp *l) 290 { 291 int unit = minor(dev); 292 293 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 294 return (ENXIO); 295 return (0); 296 } 297 298 int 299 bw2ioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 300 { 301 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 302 303 return (fbioctlfb(&sc->sc_fb, cmd, data)); 304 } 305 306 /* 307 * Return the address that would map the given device at the given 308 * offset, allowing for the given protection, or return -1 for error. 309 */ 310 paddr_t 311 bw2mmap(dev_t dev, off_t off, int prot) 312 { 313 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 314 int size = sc->sc_fb.fb_fbtype.fb_size; 315 316 if (off & PGOFSET) 317 panic("bw2mmap"); 318 319 if ((off < 0) || (off >= size)) 320 return (-1); 321 322 /* 323 * I turned on PMAP_NC here to disable the cache as I was 324 * getting horribly broken behaviour without it. 325 */ 326 return ((sc->sc_phys + off) | PMAP_NC); 327 } 328 329 /* FBIOGVIDEO: */ 330 static int 331 bw2gvideo(struct fbdevice *fb, void *data) 332 { 333 struct bw2_softc *sc = fb->fb_private; 334 int *on = data; 335 336 *on = sc->sc_video_on; 337 return (0); 338 } 339 340 /* FBIOSVIDEO: */ 341 static int 342 bw2svideo(struct fbdevice *fb, void *data) 343 { 344 struct bw2_softc *sc = fb->fb_private; 345 int *on = data; 346 347 if (sc->sc_video_on == *on) 348 return (0); 349 sc->sc_video_on = *on; 350 351 if (fb->fb_pfour) 352 fb_pfour_set_video(fb, sc->sc_video_on); 353 else 354 enable_video(sc->sc_video_on); 355 356 return(0); 357 } 358 359
Indexes created Mon Sep 22 13:09:51 GMT 2025