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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 coresystems GmbH
* Copyright (C) 2009 Libra Li <libra.li@technexion.com>
* Copyright (C) 2010 Siemens AG, Inc.
* (Written by Josef Kellermann <joseph.kellermann@heitec.de> for Siemens AG, Inc.)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <console/console.h>
#include <arch/interrupt.h>
#include "int15_func.h"
int sbios_INT15_handler(struct eregs *);
/*extern*/ unsigned long vgainfo_addr;
static INT15_function_extensions __int15_func;
/* System BIOS int15 function */
int sbios_INT15_handler(struct eregs *regs)
{
int res = -1;
printk(BIOS_DEBUG, "System BIOS INT 15h\n");
switch (regs->eax & 0xffff) {
#define BOOT_DISPLAY_DEFAULT 0
#define BOOT_DISPLAY_CRT (1 << 0)
#define BOOT_DISPLAY_TV (1 << 1)
#define BOOT_DISPLAY_EFP (1 << 2)
#define BOOT_DISPLAY_LCD (1 << 3)
#define BOOT_DISPLAY_CRT2 (1 << 4)
#define BOOT_DISPLAY_TV2 (1 << 5)
#define BOOT_DISPLAY_EFP2 (1 << 6)
#define BOOT_DISPLAY_LCD2 (1 << 7)
case 0x5f35:
regs->eax = 0x5f;
regs->ecx = BOOT_DISPLAY_DEFAULT;
res = 0;
break;
case 0x5f40:
regs->eax = 0x5f;
regs->ecx = 3; // This is mainboard specific
printk(BIOS_DEBUG, "DISPLAY=%x\n", regs->ecx);
res = 0;
break;
case 0x4e08:
switch (regs->ebx & 0xff) {
case 0x00:
regs->eax &= ~(0xff);
regs->ebx = (regs->ebx & ~(0xff)) | __int15_func.regs.func00_LCD_panel_id;
printk(BIOS_DEBUG, "DISPLAY = %x\n", regs->ebx & 0xff);
res = 0;
break;
case 0x02:
break;
case 0x05:
regs->eax &= ~(0xff);
regs->ebx = (regs->ebx & ~(0xff)) | __int15_func.regs.func05_TV_standard;
printk(BIOS_DEBUG, "TV = %x\n", regs->ebx & 0xff);
res = 0;
break;
case 0x80:
regs->eax &= ~(0xff);
regs->ebx &= ~(0xff);
printk(BIOS_DEBUG, "Integrated System Information = %x:%x\n", regs->edx, regs->edi);
vgainfo_addr = (regs->edx * 16) + regs->edi;
res = 0;
break;
case 0x89:
regs->eax &= ~(0xff);
regs->ebx &= ~(0xff);
printk(BIOS_DEBUG, "Get supported display device information\n");
res = 0;
break;
default:
break;
}
break;
default:
printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", regs->eax & 0xffff);
break;
}
return res;
}
/* Initialization VBIOS function extensions */
void install_INT15_function_extensions(INT15_function_extensions *int15_func)
{
printk(BIOS_DEBUG, "Initialize function extensions for Callback function number 04E08h ..\n");
__int15_func.regs.func00_LCD_panel_id = int15_func->regs.func00_LCD_panel_id;
__int15_func.regs.func05_TV_standard = int15_func->regs.func05_TV_standard;
mainboard_interrupt_handlers(0x15, &sbios_INT15_handler);
}
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