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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.
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <arch/io.h>
#include <device/pci_def.h>
#include <southbridge/amd/sb700/sb700.h>
#include <southbridge/amd/sb700/smbus.h>
#include <southbridge/amd/rs780/rs780.h>
void set_pcie_dereset(void)
{
u8 byte;
u16 word;
struct device *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 = pcidev_on_root(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(void)
{
u8 byte;
u16 word;
struct device *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 = pcidev_on_root(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 completely unknown if it will work at all for this board.
*/
int is_dev3_present(void)
{
u16 word;
struct device *sm_dev;
/* access the smbus extended register */
sm_dev = pcidev_on_root(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);
return !(word & (1 << 10));
}
/*************************************************
* enable the dedicated function in this board.
* This function called early than rs780_enable.
*************************************************/
static void mainboard_enable(struct device *dev)
{
printk(BIOS_INFO, "Mainboard enable. dev=0x%p\n", dev);
set_pcie_dereset();
/* get_ide_dma66(); */
/* set_thermal_config(); */
}
struct chip_operations mainboard_ops = {
.enable_dev = mainboard_enable,
};
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