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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 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; version 2 of the License.
*
* 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 <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <arch/io.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/mtrr.h>
#include <device/pci_def.h>
#include "southbridge/amd/sb700/sb700.h"
#include "southbridge/amd/sb700/smbus.h"
#include "chip.h"
void set_pcie_dereset(void);
void set_pcie_reset(void);
u8 is_dev3_present(void);
void set_pcie_dereset()
{
u8 byte;
u16 word;
device_t sm_dev;
/* set 0 to bit1 :disable GPM9 as SLP_S2 output */
/* set 0 to bit2 :disable GPM8 as AZ_RST output */
byte = pm_ioread(0x8d);
byte &= ~((1 << 1) | (1 << 2));
pm_iowrite(0x8d, byte);
/* set the GPM8 and GPM9 output enable and the value to 1 */
byte = pm_ioread(0x94);
byte &= ~((1 << 2) | (1 << 3));
byte |= ((1 << 0) | (1 << 1));
pm_iowrite(0x94, byte);
/* set the GPIO65 output enable and the value is 1 */
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
word = pci_read_config16(sm_dev, 0x7e);
word |= (1 << 0);
word &= ~(1 << 4);
pci_write_config16(sm_dev, 0x7e, word);
}
void set_pcie_reset()
{
u8 byte;
u16 word;
device_t sm_dev;
/* set 0 to bit1 :disable GPM9 as SLP_S2 output */
/* set 0 to bit2 :disable GPM8 as AZ_RST output */
byte = pm_ioread(0x8d);
byte &= ~((1 << 1) | (1 << 2));
pm_iowrite(0x8d, byte);
/* set the GPM8 and GPM9 output enable and the value to 0 */
byte = pm_ioread(0x94);
byte &= ~((1 << 2) | (1 << 3));
byte &= ~((1 << 0) | (1 << 1));
pm_iowrite(0x94, byte);
/* set the GPIO65 output enable and the value is 0 */
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
word = pci_read_config16(sm_dev, 0x7e);
word &= ~(1 << 0);
word &= ~(1 << 4);
pci_write_config16(sm_dev, 0x7e, word);
}
/*
* justify the dev3 is exist or not
* NOTE: This just copied from AMD Tilapia code.
* It is completly unknown if it will work at all for this board.
*/
u8 is_dev3_present(void)
{
u16 word;
device_t sm_dev;
/* access the smbus extended register */
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
/* put the GPIO68 output to tristate */
word = pci_read_config16(sm_dev, 0x7e);
word |= 1 << 6;
pci_write_config16(sm_dev, 0x7e,word);
/* read the GPIO68 input status */
word = pci_read_config16(sm_dev, 0x7e);
if(word & (1 << 10)){
/*not exist*/
return 0;
}else{
/*exist*/
return 1;
}
}
/*************************************************
* enable the dedicated function in this board.
* This function called early than rs780_enable.
*************************************************/
static void m4a78em_enable(device_t dev)
{
printk(BIOS_INFO, "Mainboard enable. dev=0x%p\n", dev);
setup_uma_memory();
set_pcie_dereset();
/* get_ide_dma66(); */
/* set_thermal_config(); */
}
struct chip_operations mainboard_ops = {
CHIP_NAME("ASUS M4A78-EM Mainboard")
.enable_dev = m4a78em_enable,
};
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