bw2.c revision 1.11
1 /* $NetBSD: bw2.c,v 1.11 1997/10/06 19:58:07 gwr 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 struct cfdriver bwtwo_cd = { 93 NULL, "bwtwo", DV_DULL 94 }; 95 96 /* XXX we do not handle frame buffer interrupts */ 97 98 static int bw2gvideo __P((struct fbdevice *, void *)); 99 static int bw2svideo __P((struct fbdevice *, void *)); 100 101 static struct fbdriver bw2fbdriver = { 102 bw2open, bw2close, bw2mmap, 103 fb_noioctl, 104 bw2gvideo, bw2svideo, 105 fb_noioctl, fb_noioctl, }; 106 107 static int 108 bw2match(parent, cf, args) 109 struct device *parent; 110 struct cfdata *cf; 111 void *args; 112 { 113 struct confargs *ca = args; 114 int x; 115 116 #if 0 /* XXX - Assume only one is in use anyway... */ 117 /* 118 * This driver only supports one unit because the 119 * system enable register is used for blanking. 120 */ 121 if (cf->cf_unit != 0) 122 return (0); 123 #endif 124 125 if (ca->ca_paddr == -1) { 126 if (cpu_machine_id == SUN3_MACH_50) 127 ca->ca_paddr = BW2_50_PADDR; 128 else 129 ca->ca_paddr = BW2_FB_PADDR; 130 } 131 132 /* The peek returns -1 on bus error. */ 133 x = bus_peek(ca->ca_bustype, ca->ca_paddr, 1); 134 return (x != -1); 135 } 136 137 /* 138 * Attach a display. We need to notice if it is the console, too. 139 */ 140 static void 141 bw2attach(parent, self, args) 142 struct device *parent, *self; 143 void *args; 144 { 145 struct bw2_softc *sc = (struct bw2_softc *)self; 146 struct fbdevice *fb = &sc->sc_fb; 147 struct confargs *ca = args; 148 struct fbtype *fbt; 149 int tmp; 150 151 sc->sc_phys = ca->ca_paddr; 152 153 fb->fb_driver = &bw2fbdriver; 154 fb->fb_private = sc; 155 fb->fb_name = sc->sc_dev.dv_xname; 156 157 fbt = &fb->fb_fbtype; 158 fbt->fb_type = FBTYPE_SUN2BW; 159 fbt->fb_depth = 1; 160 fbt->fb_cmsize = 0; 161 162 fbt->fb_width = 1152; 163 fbt->fb_height = 900; 164 fbt->fb_size = BW2_FBSIZE; 165 166 switch (cpu_machine_id) { 167 case SUN3_MACH_60: 168 /* 169 * Only the model 60 can have hi-res. 170 * XXX - Use PROM screen size values? 171 */ 172 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 173 if ((tmp != -1) && (tmp & 0x80) == 0) 174 goto high_res; 175 break; 176 177 case SUN3_MACH_260: 178 /* The Sun3/260 is ALWAYS high-resolution! */ 179 high_res: 180 fbt->fb_width = 1600; 181 fbt->fb_height = 1280; 182 fbt->fb_size = BW2_FBSIZE_HIRES; 183 break; 184 } 185 186 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 187 fb_attach(fb, 1); 188 } 189 190 int 191 bw2open(dev, flags, mode, p) 192 dev_t dev; 193 int flags, mode; 194 struct proc *p; 195 { 196 int unit = minor(dev); 197 198 if (unit >= bwtwo_cd.cd_ndevs || bwtwo_cd.cd_devs[unit] == NULL) 199 return (ENXIO); 200 return (0); 201 } 202 203 int 204 bw2close(dev, flags, mode, p) 205 dev_t dev; 206 int flags, mode; 207 struct proc *p; 208 { 209 210 return (0); 211 } 212 213 int 214 bw2ioctl(dev, cmd, data, flags, p) 215 dev_t dev; 216 u_long cmd; 217 caddr_t data; 218 int flags; 219 struct proc *p; 220 { 221 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 222 223 return (fbioctlfb(&sc->sc_fb, cmd, data)); 224 } 225 226 /* 227 * Return the address that would map the given device at the given 228 * offset, allowing for the given protection, or return -1 for error. 229 */ 230 int 231 bw2mmap(dev, off, prot) 232 dev_t dev; 233 int off, prot; 234 { 235 struct bw2_softc *sc = bwtwo_cd.cd_devs[minor(dev)]; 236 237 if (off & PGOFSET) 238 return (-1); 239 if ((unsigned)off >= sc->sc_fb.fb_fbtype.fb_size) 240 return (-1); 241 /* 242 * I turned on PMAP_NC here to disable the cache as I was 243 * getting horribly broken behaviour with it on. 244 */ 245 return ((sc->sc_phys + off) | PMAP_NC); 246 } 247 248 /* FBIOGVIDEO: */ 249 static int bw2gvideo(fb, data) 250 struct fbdevice *fb; 251 void *data; 252 { 253 int *on = data; 254 int s, ena; 255 256 s = splhigh(); 257 ena = get_control_byte(SYSTEM_ENAB); 258 splx(s); 259 260 *on = (ena & SYSTEM_ENAB_VIDEO) ? 1 : 0; 261 return (0); 262 } 263 264 /* FBIOSVIDEO */ 265 static int bw2svideo(fb, data) 266 struct fbdevice *fb; 267 void *data; 268 { 269 int *on = data; 270 int s, ena; 271 272 s = splhigh(); 273 ena = get_control_byte(SYSTEM_ENAB); 274 275 if (*on) ena |= SYSTEM_ENAB_VIDEO; 276 else ena &= ~SYSTEM_ENAB_VIDEO; 277 278 set_control_byte(SYSTEM_ENAB, ena); 279 splx(s); 280 281 return(0); 282 } 283
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