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/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2007 Advanced Micro Devices, 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 <arch/io.h>
#include <stdint.h>
#include <cpu/amd/vr.h>
#include <console/console.h>
/*
* This function mirrors the Graphics_Init routine in GeodeROM.
*/
void graphics_init(void)
{
uint16_t wClassIndex, wData, res;
/* SoftVG initialization */
printk_debug("Graphics init...\n");
/* Call SoftVG with the main configuration parameters. */
/* NOTE: SoftVG expects the memory size to be given in 2MB blocks */
wClassIndex = (VRC_VG << 8) + VG_CONFIG;
/*
* Graphics Driver Enabled (13) 0, NO (lets BIOS controls the GP)
* External Monochrome Card Support(12) 0, NO
* Controller Priority Select(11) 1, Primary
* Display Select(10:8) 0x0, CRT
* Graphics Memory Size(7:1) CONFIG_VIDEO_MB >> 1,
* defined in mainboard/../Options.lb
* PLL Reference Clock Bypass(0) 0, Default
*/
/* Video RAM has to be given in 2MB chunks
* the value is read @ 7:1 (value in 7:0 looks like /2)
* so we can add the real value in megabytes
*/
wData = VG_CFG_DRIVER | VG_CFG_PRIORITY |
VG_CFG_DSCRT | (CONFIG_VIDEO_MB & VG_MEM_MASK);
vrWrite(wClassIndex, wData);
res = vrRead(wClassIndex);
printk_debug("VRC_VG value: 0x%04x\n", res);
}
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