1 /* $NetBSD: fb.c,v 1.3 1995/04/10 05:45:56 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 * @(#)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/conf.h> 53 #include <sys/device.h> 54 #include <sys/ioctl.h> 55 #include <sys/proc.h> 56 57 #include <machine/fbio.h> 58 59 #include "fbvar.h" 60 61 static struct fbdevice *devfb; 62 static int fbpriority; 63 64 /* 65 * This is called by the real driver (i.e. bw2, cg3, ...) 66 * to declare itself as a potential default frame buffer. 67 */ 68 void 69 fb_attach(fb, newpri) 70 struct fbdevice *fb; 71 int newpri; 72 { 73 if (fbpriority < newpri) { 74 fbpriority = newpri; 75 devfb = fb; 76 } 77 } 78 79 int 80 fbopen(dev, flags, mode, p) 81 dev_t dev; 82 int flags, mode; 83 struct proc *p; 84 { 85 86 if (devfb == NULL) 87 return (ENXIO); 88 return ((*devfb->fb_driver->fbd_open)(dev, flags, mode, p)); 89 } 90 91 int 92 fbclose(dev, flags, mode, p) 93 dev_t dev; 94 int flags, mode; 95 struct proc *p; 96 { 97 98 return ((*devfb->fb_driver->fbd_close)(dev, flags, mode, p)); 99 } 100 101 int 102 fbioctl(dev, cmd, data, flags, p) 103 dev_t dev; 104 u_long cmd; 105 caddr_t data; 106 int flags; 107 struct proc *p; 108 { 109 return (fbioctlfb(devfb, cmd, data)); 110 } 111 112 int 113 fbmmap(dev, off, prot) 114 dev_t dev; 115 int off, prot; 116 { 117 return ((*devfb->fb_driver->fbd_mmap)(dev, off, prot)); 118 } 119 120 void 121 fb_unblank() 122 { 123 int on = 1; 124 125 if (devfb) { 126 (void) fbioctlfb(devfb, FBIOSVIDEO, (caddr_t)&on); 127 } 128 } 129 130 /* 131 * Common fb ioctl function 132 */ 133 int 134 fbioctlfb(fb, cmd, data) 135 struct fbdevice *fb; 136 u_long cmd; 137 caddr_t data; 138 { 139 struct fbdriver *fbd = fb->fb_driver; 140 int error; 141 142 switch (cmd) { 143 144 case FBIOGTYPE: 145 *(struct fbtype *)data = fb->fb_fbtype; 146 error = 0; 147 break; 148 149 case FBIOGATTR: 150 error = (*fbd->fbd_gattr)(fb, (struct fbgattr *)data); 151 break; 152 153 case FBIOGVIDEO: 154 error = (*fbd->fbd_gvideo)(fb, (int *)data); 155 break; 156 157 case FBIOSVIDEO: 158 error = (*fbd->fbd_svideo)(fb, (int *)data); 159 break; 160 161 case FBIOGETCMAP: 162 error = (*fbd->fbd_getcmap)(fb, (struct fbcmap *)data); 163 break; 164 165 case FBIOPUTCMAP: 166 error = (*fbd->fbd_putcmap)(fb, (struct fbcmap *)data); 167 break; 168 169 default: 170 error = ENOTTY; 171 } 172 return (error); 173 } 174