1 /* $NetBSD: fb.c,v 1.4 1996/12/17 21:10:41 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 * @(#)fb.c 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * /dev/fb (indirect frame buffer driver). 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/conf.h> 54 #include <sys/device.h> 55 #include <sys/ioctl.h> 56 #include <sys/proc.h> 57 58 #include <machine/fbio.h> 59 60 #include "fbvar.h" 61 62 cdev_decl(fb); 63 64 static struct fbdevice *devfb; 65 static int fbpriority; 66 67 /* 68 * This is called by the real driver (i.e. bw2, cg3, ...) 69 * to declare itself as a potential default frame buffer. 70 */ 71 void 72 fb_attach(fb, newpri) 73 struct fbdevice *fb; 74 int newpri; 75 { 76 if (fbpriority < newpri) { 77 fbpriority = newpri; 78 devfb = fb; 79 } 80 } 81 82 int 83 fbopen(dev, flags, mode, p) 84 dev_t dev; 85 int flags, mode; 86 struct proc *p; 87 { 88 89 if (devfb == NULL) 90 return (ENXIO); 91 return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p)); 92 } 93 94 int 95 fbclose(dev, flags, mode, p) 96 dev_t dev; 97 int flags, mode; 98 struct proc *p; 99 { 100 101 return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p)); 102 } 103 104 int 105 fbioctl(dev, cmd, data, flags, p) 106 dev_t dev; 107 u_long cmd; 108 caddr_t data; 109 int flags; 110 struct proc *p; 111 { 112 return (fbioctlfb(devfb, cmd, data)); 113 } 114 115 int 116 fbmmap(dev, off, prot) 117 dev_t dev; 118 int off, prot; 119 { 120 return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot)); 121 } 122 123 /* 124 * Common fb ioctl function 125 */ 126 int 127 fbioctlfb(fb, cmd, data) 128 struct fbdevice *fb; 129 u_long cmd; 130 caddr_t data; 131 { 132 struct fbdriver *fbd = fb->fb_driver; 133 void *vp = (void *)data; 134 int error; 135 136 switch (cmd) { 137 138 case FBIOGTYPE: 139 *(struct fbtype *)vp = fb->fb_fbtype; 140 error = 0; 141 break; 142 143 case FBIOGATTR: 144 error = (*fbd->fbd_gattr)(fb, vp); 145 break; 146 147 case FBIOGVIDEO: 148 error = (*fbd->fbd_gvideo)(fb, vp); 149 break; 150 151 case FBIOSVIDEO: 152 error = (*fbd->fbd_svideo)(fb, vp); 153 break; 154 155 case FBIOGETCMAP: 156 error = (*fbd->fbd_getcmap)(fb, vp); 157 break; 158 159 case FBIOPUTCMAP: 160 error = (*fbd->fbd_putcmap)(fb, vp); 161 break; 162 163 default: 164 error = ENOTTY; 165 } 166 return (error); 167 } 168 169 void 170 fb_unblank() 171 { 172 int on = 1; 173 174 if (devfb == NULL) 175 return; 176 177 (*devfb->fb_driver->fbd_svideo)(devfb, (void *)&on); 178 } 179 180 /* 181 * Default ioctl function to put in struct fbdriver 182 * for functions that are not supported. 183 */ 184 int 185 fb_noioctl(fbd, vp) 186 struct fbdevice *fbd; 187 void *vp; 188 { 189 return ENOTTY; 190 } 191 192