kernel/drivers/char/video/vesa.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <system.h>
  21 #include <arch/io.h>
  22 #include <string.h>
  23 #include <config.h>
  24 #include <task.h>
  25
  26 unsigned short *vesafb = 0;
  27 extern unsigned char vgagui;
  28
  29 typedef struct PMInfoBlock {
  30         char Signature[4];
  31         unsigned short EntryPoint;
  32         unsigned short PMInitialize;
  33         unsigned short BIOSDataSel;
  34         unsigned short A0000Sel;
  35         unsigned short B0000Sel;
  36         unsigned short B8000Sel;
  37         unsigned short CodeSegSel;
  38         char InProtectedMode;
  39         char Checksum;
  40 } PMInfoBlock;
  41
  42 typedef void (*void_fn_void_t)(char *arg, int flags);
  43 extern task_t *_curr_task;
  44
  45 unsigned init_video_vesa ()
  46 {
  47 #ifdef CONFIG_DRV_VESA
  48         if (kernel_attr & KERNEL_NOVESA)
  49                 return 0;
  50
  51         //prot_to_real ();
  52
  53         /* get address from hacked grub */
  54         unsigned *grub_baseaddr = (unsigned *) 0x60000;
  55
  56         vesafb = (unsigned short *) *grub_baseaddr;
  57
  58         if (!vesafb)
  59                 return 0;
  60
  61         vgagui = 2;
  62
  63         //printf ("vesa: 0x%x\n", vesafb);
  64
  65         /* draw "clear" screen first */
  66         unsigned p = 0;
  67         for (p = 0; p < 800*600; p ++)
  68                 vesafb[p] = p/32768;
  69
  70 #endif
  71         return 1;
  72 }
  73
  74 unsigned vesa_16cto16b (unsigned char color)
  75 {
  76         switch (color) {
  77                 case 0:
  78                         return 0;
  79                 case 1:
  80                         return 0x0000f1;        // ok
  81                 case 2:
  82                         return 0xee8d00;        // ok
  83                 case 3:
  84                         return 0x808000;        // ok
  85                 case 4:
  86                         return 0xffa000;        // ok
  87                 case 5:
  88                         return 0x018051;        // ok
  89                 case 6:
  90                         return 0xC3993D;        // ??
  91                 case 7:
  92                         return 0xf007fd;        // ??
  93                 case 8:
  94                         return 0xb457fd;        // ??
  95                 case 9:
  96                         return 0x0a02fa;        // ok
  97                 case 10:
  98                         return 0xffef00;        // ok
  99                 case 11:
 100                         return 0x0a05fa;        // ok
 101                 case 12:
 102                         return 0x4f8800;        // ok
 103                 case 13:
 104                         return 0xf8faff;        // ok
 105                 case 14:
 106                         return 0xffffd0;        // ok
 107                 case 15:
 108                         return 0xffffff;        // ok
 109         }
 110
 111         return 0;
 112 }