FreeBSD/Linux Kernel Cross Reference
sys/dev/syscons/scvesactl.c

     /*-
      * Copyright (c) 1998 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
      * All rights reserved.
      *
      * This code is derived from software contributed to The DragonFly Project
      * by Sascha Wildner <saw@online.de>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer as
     *    the first lines of this file unmodified.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/9.0/sys/dev/syscons/scvesactl.c 197025 2009-09-09 09:50:31Z delphij $");
    
    #include "opt_vga.h"
    
    #ifndef VGA_NO_MODE_CHANGE
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/tty.h>
    #include <sys/kernel.h>
    #include <sys/fbio.h>
    #include <sys/consio.h>
    
    #include <dev/fb/vesa.h>
    
    #include <dev/fb/fbreg.h>
    #include <dev/syscons/syscons.h>
    
    static tsw_ioctl_t *prev_user_ioctl;
    
    static int
    vesa_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
    {
            scr_stat *scp;
            int mode;
    
            scp = SC_STAT(tp);
    
            switch (cmd) {
    
            /* generic text modes */
            case SW_TEXT_132x25: case SW_TEXT_132x30:
            case SW_TEXT_132x43: case SW_TEXT_132x50:
            case SW_TEXT_132x60:
                    if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
                            return ENODEV;
                    return sc_set_text_mode(scp, tp, cmd & 0xff, 0, 0, 0, 0);
    
            /* text modes */
            case SW_VESA_C80x60:
            case SW_VESA_C132x25:
            case SW_VESA_C132x43:
            case SW_VESA_C132x50:
            case SW_VESA_C132x60:
                    if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
                            return ENODEV;
                    mode = (cmd & 0xff) + M_VESA_BASE;
                    return sc_set_text_mode(scp, tp, mode, 0, 0, 0, 0);
    
            /* graphics modes */
            case SW_VESA_32K_320:   case SW_VESA_64K_320: 
            case SW_VESA_FULL_320:
    
            case SW_VESA_CG640x400:
    
            case SW_VESA_CG640x480:
            case SW_VESA_32K_640:   case SW_VESA_64K_640:
            case SW_VESA_FULL_640:
    
            case SW_VESA_800x600:   case SW_VESA_CG800x600:
            case SW_VESA_32K_800:   case SW_VESA_64K_800:
            case SW_VESA_FULL_800:
    
            case SW_VESA_1024x768:  case SW_VESA_CG1024x768:
            case SW_VESA_32K_1024:  case SW_VESA_64K_1024:
            case SW_VESA_FULL_1024:
    
           case SW_VESA_1280x1024: case SW_VESA_CG1280x1024:
           case SW_VESA_32K_1280:  case SW_VESA_64K_1280:
           case SW_VESA_FULL_1280:
                   if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
                           return ENODEV;
                   mode = (cmd & 0xff) + M_VESA_BASE;
                   return sc_set_graphics_mode(scp, tp, mode);
           default:
                   if (IOCGROUP(cmd) == 'V') {
                           if (!(scp->sc->adp->va_flags & V_ADP_MODECHANGE))
                                   return ENODEV;
   
                           mode = (cmd & 0xff) + M_VESA_BASE;
   
                           if (((cmd & IOC_DIRMASK) == IOC_VOID) &&
                               (mode > M_VESA_FULL_1280) &&
                               (mode < M_VESA_MODE_MAX))
                                   return sc_set_graphics_mode(scp, tp, mode);
                   }
           }
   
           if (prev_user_ioctl)
                   return (*prev_user_ioctl)(tp, cmd, data, td);
           else
                   return ENOIOCTL;
   }
   
   int
   vesa_load_ioctl(void)
   {
           if (prev_user_ioctl)
                   return EBUSY;
           prev_user_ioctl = sc_user_ioctl;
           sc_user_ioctl = vesa_ioctl;
           return 0;
   }
   
   int
   vesa_unload_ioctl(void)
   {
           if (sc_user_ioctl != vesa_ioctl)
                   return EBUSY;
           sc_user_ioctl = prev_user_ioctl;
           prev_user_ioctl = NULL;
           return 0;
   }
   
   #endif /* VGA_NO_MODE_CHANGE */

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