1 /* $NetBSD: bw2.c,v 1.4 1995/04/10 07:05:56 mycroft 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/device.h> 55 #include <sys/ioctl.h> 56 #include <sys/malloc.h> 57 #include <sys/mman.h> 58 #include <sys/tty.h> 59 60 #include <vm/vm.h> 61 62 #include <machine/cpu.h> 63 #include <machine/fbio.h> 64 #include <machine/autoconf.h> 65 #include <machine/pmap.h> 66 #include <machine/control.h> 67 68 #include "fbvar.h" 69 #include "bw2reg.h" 70 71 extern unsigned char cpu_machine_id; 72 73 /* per-display variables */ 74 struct bw2_softc { 75 struct device sc_dev; /* base device */ 76 struct fbdevice sc_fb; /* frame buffer device */ 77 int sc_phys; /* display RAM (phys addr) */ 78 }; 79 80 /* autoconfiguration driver */ 81 static void bw2attach __P((struct device *, struct device *, void *)); 82 static int bw2match __P((struct device *, void *, void *)); 83 84 struct cfdriver bwtwocd = { 85 NULL, "bwtwo", bw2match, bw2attach, 86 DV_DULL, sizeof(struct bw2_softc) }; 87 88 /* XXX we do not handle frame buffer interrupts */ 89 90 /* frame buffer generic driver */ 91 int bw2open(), bw2close(), bw2ioctl(), bw2mmap(); 92 93 static int bw2gvideo __P((struct fbdevice *, int *)); 94 static int bw2svideo __P((struct fbdevice *, int *)); 95 96 static struct fbdriver bw2fbdriver = { 97 bw2open, bw2close, bw2mmap, 98 enoioctl, /* gattr */ 99 bw2gvideo, bw2svideo, 100 enoioctl, enoioctl }; 101 102 static int 103 bw2match(parent, vcf, args) 104 struct device *parent; 105 void *vcf, *args; 106 { 107 struct cfdata *cf = vcf; 108 struct confargs *ca = args; 109 int x; 110 111 /* 112 * This driver only supports one unit because the 113 * system enable register is used for blanking. 114 */ 115 if (cf->cf_unit != 0) 116 return (0); 117 118 if (ca->ca_paddr == -1) { 119 if (cpu_machine_id == SUN3_MACH_50) 120 ca->ca_paddr = BW2_50_PADDR; 121 else 122 ca->ca_paddr = BW2_FB_PADDR; 123 } 124 125 /* The peek returns -1 on bus error. */ 126 x = bus_peek(ca->ca_bustype, ca->ca_paddr, 1); 127 return (x != -1); 128 } 129 130 /* 131 * Attach a display. We need to notice if it is the console, too. 132 */ 133 static void 134 bw2attach(parent, self, args) 135 struct device *parent, *self; 136 void *args; 137 { 138 struct bw2_softc *sc = (struct bw2_softc *)self; 139 struct fbdevice *fb = &sc->sc_fb; 140 struct confargs *ca = args; 141 struct fbtype *fbt; 142 int ramsize; 143 144 sc->sc_phys = ca->ca_paddr; 145 146 fb->fb_driver = &bw2fbdriver; 147 fb->fb_private = sc; 148 fb->fb_name = sc->sc_dev.dv_xname; 149 150 fbt = &fb->fb_fbtype; 151 fbt->fb_type = FBTYPE_SUN2BW; 152 fbt->fb_depth = 1; 153 fbt->fb_cmsize = 0; 154 155 fbt->fb_width = 1152; 156 fbt->fb_height = 900; 157 fbt->fb_size = BW2_FBSIZE; 158 159 /* 160 * Only the model 60 can have hi-res. 161 * XXX - Use PROM screen size values? 162 */ 163 if (cpu_machine_id == SUN3_MACH_60) { 164 int tmp; 165 tmp = bus_peek(BUS_OBMEM, BW2_CR_PADDR, 1); 166 if ((tmp != -1) && (tmp & 0x80) == 0) { 167 fbt->fb_width = 1600; 168 fbt->fb_height = 1280; 169 fbt->fb_size = BW2_FBSIZE_HIRES; 170 } 171 } 172 173 printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); 174 fb_attach(fb, 1); 175 } 176 177 int 178 bw2open(dev, flags, mode, p) 179 dev_t dev; 180 int flags, mode; 181 struct proc *p; 182 { 183 int unit = minor(dev); 184 185 if (unit >= bwtwocd.cd_ndevs || bwtwocd.cd_devs[unit] == NULL) 186 return (ENXIO); 187 return (0); 188 } 189 190 int 191 bw2close(dev, flags, mode, p) 192 dev_t dev; 193 int flags, mode; 194 struct proc *p; 195 { 196 197 return (0); 198 } 199 200 int 201 bw2ioctl(dev, cmd, data, flags, p) 202 dev_t dev; 203 u_long cmd; 204 caddr_t data; 205 int flags; 206 struct proc *p; 207 { 208 struct bw2_softc *sc = bwtwocd.cd_devs[minor(dev)]; 209 210 return (fbioctlfb(&sc->sc_fb, cmd, data)); 211 } 212 213 /* 214 * Return the address that would map the given device at the given 215 * offset, allowing for the given protection, or return -1 for error. 216 */ 217 int 218 bw2mmap(dev, off, prot) 219 dev_t dev; 220 int off, prot; 221 { 222 struct bw2_softc *sc = bwtwocd.cd_devs[minor(dev)]; 223 224 if (off & PGOFSET) 225 return (-1); 226 if ((unsigned)off >= sc->sc_fb.fb_fbtype.fb_size) 227 return (-1); 228 /* 229 * I turned on PMAP_NC here to disable the cache as I was 230 * getting horribly broken behaviour with it on. 231 */ 232 return ((sc->sc_phys + off) | PMAP_NC); 233 } 234 235 /* FBIOGVIDEO: */ 236 static int bw2gvideo(fb, on) 237 struct fbdevice *fb; 238 int *on; 239 { 240 int s, ena; 241 242 s = splhigh(); 243 ena = get_control_byte((char *)SYSTEM_ENAB); 244 splx(s); 245 246 *on = (ena & SYSTEM_ENAB_VIDEO) ? 1 : 0; 247 return (0); 248 } 249 250 /* FBIOSVIDEO */ 251 static int bw2svideo(fb, on) 252 struct fbdevice *fb; 253 int *on; 254 { 255 int s, ena; 256 257 s = splhigh(); 258 ena = get_control_byte((char *)SYSTEM_ENAB); 259 260 if (*on) ena |= SYSTEM_ENAB_VIDEO; 261 else ena &= ~SYSTEM_ENAB_VIDEO; 262 263 set_control_byte((char *)SYSTEM_ENAB, ena); 264 splx(s); 265 266 return(0); 267 } 268