src/mainboard/siemens/sitemp_g1p1/int15_func.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2009 coresystems GmbH
   5  * Copyright (C) 2009 Libra Li <libra.li@technexion.com>
   6  * Copyright (C) 2010 Siemens AG, Inc.
   7  * (Written by Josef Kellermann <joseph.kellermann@heitec.de> for Siemens AG, Inc.)
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  22  */
  23
  24 #include <stdint.h>
  25 #include <stdlib.h>
  26 #include <console/console.h>
  27 #include <arch/interrupt.h>
  28 #include "int15_func.h"
  29
  30 int sbios_INT15_handler(struct eregs *);
  31 /*extern*/ unsigned long vgainfo_addr;
  32
  33 static INT15_function_extensions __int15_func;
  34
  35 /* System BIOS int15 function */
  36 int sbios_INT15_handler(struct eregs *regs)
  37 {
  38     int res = -1;
  39
  40     printk(BIOS_DEBUG, "System BIOS INT 15h\n");
  41
  42     switch (regs->eax & 0xffff) {
  43 #define BOOT_DISPLAY_DEFAULT    0
  44 #define BOOT_DISPLAY_CRT        (1 << 0)
  45 #define BOOT_DISPLAY_TV         (1 << 1)
  46 #define BOOT_DISPLAY_EFP        (1 << 2)
  47 #define BOOT_DISPLAY_LCD        (1 << 3)
  48 #define BOOT_DISPLAY_CRT2       (1 << 4)
  49 #define BOOT_DISPLAY_TV2        (1 << 5)
  50 #define BOOT_DISPLAY_EFP2       (1 << 6)
  51 #define BOOT_DISPLAY_LCD2       (1 << 7)
  52         case 0x5f35:
  53                 regs->eax = 0x5f;
  54                 regs->ecx = BOOT_DISPLAY_DEFAULT;
  55                 res = 0;
  56                 break;
  57         case 0x5f40:
  58                 regs->eax = 0x5f;
  59                 regs->ecx = 3; // This is mainboard specific
  60                 printk(BIOS_DEBUG, "DISPLAY=%x\n", regs->ecx);
  61                 res = 0;
  62                 break;
  63     case 0x4e08:
  64         switch (regs->ebx & 0xff) {
  65         case 0x00:
  66             regs->eax &= ~(0xff);
  67             regs->ebx = (regs->ebx & ~(0xff)) | __int15_func.regs.func00_LCD_panel_id;
  68                         printk(BIOS_DEBUG, "DISPLAY = %x\n", regs->ebx & 0xff);
  69             res = 0;
  70                         break;
  71                 case 0x02:
  72                         break;
  73         case 0x05:
  74             regs->eax &= ~(0xff);
  75             regs->ebx = (regs->ebx & ~(0xff)) | __int15_func.regs.func05_TV_standard;
  76                         printk(BIOS_DEBUG, "TV = %x\n", regs->ebx & 0xff);
  77             res = 0;
  78                         break;
  79                 case 0x80:
  80                         regs->eax &= ~(0xff);
  81                         regs->ebx &= ~(0xff);
  82                         printk(BIOS_DEBUG, "Integrated System Information = %x:%x\n", regs->edx, regs->edi);
  83                         vgainfo_addr = (regs->edx * 16) + regs->edi;
  84                         res = 0;
  85                         break;
  86                 case 0x89:
  87                         regs->eax &= ~(0xff);
  88                         regs->ebx &= ~(0xff);
  89                         printk(BIOS_DEBUG, "Get supported display device information\n");
  90                         res = 0;
  91                         break;
  92                 default:
  93                         break;
  94         }
  95         break;
  96         default:
  97         printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", regs->eax & 0xffff);
  98                 break;
  99     }
 100
 101     return res;
 102 }
 103
 104 /* Initialization VBIOS function extensions */
 105 void install_INT15_function_extensions(INT15_function_extensions *int15_func)
 106 {
 107         printk(BIOS_DEBUG, "Initialize function extensions for Callback function number 04E08h ..\n");
 108         __int15_func.regs.func00_LCD_panel_id = int15_func->regs.func00_LCD_panel_id;
 109         __int15_func.regs.func05_TV_standard = int15_func->regs.func05_TV_standard;
 110         mainboard_interrupt_handlers(0x15, &sbios_INT15_handler);
 111 }