bw2.c revision 1.12
1 /* $NetBSD: bw2.c,v 1.12 1998/01/12 20:32:17 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 <vm/vm.h> 64 65 #include <machine/autoconf.h> 66 #include <machine/control.h> 67 #include <machine/cpu.h> 68 #include <machine/fbio.h> 69 #include <machine/idprom.h> 70 #include <machine/pmap.h> 71 72 #include "fbvar.h" 73 #include "bw2reg.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 }; 83 84 /* autoconfiguration driver */ 85 static void bw2attach __P((struct device *, struct device *, void *)); 86 static int bw2match __P((struct device *, struct cfdata *, void *)); 87 88 struct cfattach bwtwo_ca = { 89 sizeof(struct bw2_softc), bw2match, bw2attach 90 }; 91 92 extern struct cfdriver bwtwo_cd; 93 94 /* XXX we do not handle frame buffer interrupts */ 95 96 static int bw2gvideo __P((struct fbdevice *, void *)); 97 static int bw2svideo __P((struct fbdevice *, void *)); 98 99 static struct fbdriver bw2fbdriver = { 100 bw2open, bw2close, bw2mmap, 101 fb_noioctl, 102 bw2gvideo, bw2svideo, 103 fb_noioctl, fb_noioctl, }; 104 105 static int 106 bw2match(parent, cf, args) 107 struct device *parent; 108 struct cfdata *cf; 109 void *args; 110 { 111 struct confargs *ca = args; 112 int x; 113 114 #if 0 /* XXX - Assume only one is in use anyway... */ 115 /* 116 * This driver only supports one unit because the 117 * system enable register is used for blanking. 118 */ 119 if (cf->cf_unit != 0) 120 return (0); 121 #endif 122 123 if (ca->ca_paddr == -1) { 124 if (cpu_machine_id == SUN3_MACH_50) 125 ca->ca_paddr = BW2_50_PADDR; 126 else 127 ca->ca_paddr = BW2_FB_PADDR; 128 } 129 130 /* The peek returns -1 on bus error. */ 131 x = bus_peek(ca->ca_bustype, ca->ca_paddr, 1); 132 return (x != -1); 133 } 134 135 /* 136 * Attach a display. We need to notice if it is the console, too. 137 */ 138 static void 139 bw2attach(parent, self, args) 140 struct device *parent, *self; 141 void *args; 142 { 143 struct bw2_softc *sc = (struct bw2_softc *)self; 144 struct fbdevice *fb = &sc->sc_fb; 145 struct confargs *ca = args; 146 struct fbtype *fbt; 147 int tmp; 148 149 sc->sc_phys = ca->ca_paddr; 150 151 fb->fb_driver = &bw2fbdriver; 152 fb->fb_private = sc; 153 fb->fb_name = sc->sc_dev.dv_xname; 154 155 fbt = &fb->fb_fbtype; 156 fbt->fb_type = FBTYPE_SUN2BW; 157 fbt->fb_depth = 1; 158 fbt->fb_cmsize = 0; 159 160 fbt->fb_width = 1152; 161 fbt->fb_height = 900; 162 fbt->fb_size = BW2_FBSIZE; 163 164 switch (cpu_machine_id) { 165 case SUN3_MACH_60: 166 /* 167 * Only the model 60 can have hi-res. 168 * XXX - Use PROM screen size values? 169 */ 170 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 171 if ((tmp != -1) && (tmp & 0x80) == 0) 172 goto high_res; 173 break; 174 175 case SUN3_MACH_260: 176 /* The Sun3/260 is ALWAYS high-resolution! */ 177 high_res: 178 fbt->fb_width = 1600; 179 fbt->fb_height = 1280; 180 fbt->fb_size = BW2_FBSIZE_HIRES; 181 break; 182 } 183 184 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 185 fb_attach(fb, 1); 186 } 187 188 int 189 bw2open(dev, flags, mode, p) 190 dev_t dev; 191 int flags, mode; 192 struct proc *p; 193 { 194 int unit = minor(dev); 195 196 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 197 return (ENXIO); 198 return (0); 199 } 200 201 int 202 bw2close(dev, flags, mode, p) 203 dev_t dev; 204 int flags, mode; 205 struct proc *p; 206 { 207 208 return (0); 209 } 210 211 int 212 bw2ioctl(dev, cmd, data, flags, p) 213 dev_t dev; 214 u_long cmd; 215 caddr_t data; 216 int flags; 217 struct proc *p; 218 { 219 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 220 221 return (fbioctlfb(&sc->sc_fb, cmd, data)); 222 } 223 224 /* 225 * Return the address that would map the given device at the given 226 * offset, allowing for the given protection, or return -1 for error. 227 */ 228 int 229 bw2mmap(dev, off, prot) 230 dev_t dev; 231 int off, prot; 232 { 233 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 234 235 if (off & PGOFSET) 236 return (-1); 237 if ((unsigned)off >= sc->sc_fb.fb_fbtype.fb_size) 238 return (-1); 239 /* 240 * I turned on PMAP_NC here to disable the cache as I was 241 * getting horribly broken behaviour with it on. 242 */ 243 return ((sc->sc_phys + off) | PMAP_NC); 244 } 245 246 /* FBIOGVIDEO: */ 247 static int bw2gvideo(fb, data) 248 struct fbdevice *fb; 249 void *data; 250 { 251 int *on = data; 252 int s, ena; 253 254 s = splhigh(); 255 ena = get_control_byte(SYSTEM_ENAB); 256 splx(s); 257 258 *on = (ena & SYSTEM_ENAB_VIDEO) ? 1 : 0; 259 return (0); 260 } 261 262 /* FBIOSVIDEO */ 263 static int bw2svideo(fb, data) 264 struct fbdevice *fb; 265 void *data; 266 { 267 int *on = data; 268 int s, ena; 269 270 s = splhigh(); 271 ena = get_control_byte(SYSTEM_ENAB); 272 273 if (*on) ena |= SYSTEM_ENAB_VIDEO; 274 else ena &= ~SYSTEM_ENAB_VIDEO; 275 276 set_control_byte(SYSTEM_ENAB, ena); 277 splx(s); 278 279 return(0); 280 } 281
Indexes created Mon Sep 22 13:09:51 GMT 2025