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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_ops.h>
#include <device/pci_def.h>
#include <southbridge/amd/sb700/sb700.h>
#include <southbridge/amd/sb700/smbus.h>
#include <southbridge/amd/rs780/rs780.h>
#define ADT7461_ADDRESS 0x4C
#define ARA_ADDRESS 0x0C /* Alert Response Address */
#define ADT7461_read_byte(address) \
do_smbus_read_byte(SMBUS_IO_BASE, ADT7461_ADDRESS, address)
#define ARA_read_byte(address) \
do_smbus_read_byte(SMBUS_IO_BASE, ARA_ADDRESS, address)
#define ADT7461_write_byte(address, val) \
do_smbus_write_byte(SMBUS_IO_BASE, ADT7461_ADDRESS, address, val)
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
*/
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));
}
/*
* set gpio40 gfx
*/
static void set_gpio40_gfx(void)
{
u8 byte;
u32 dword;
struct device *sm_dev;
/* disable the GPIO40 as CLKREQ2# function */
byte = pm_ioread(0xd3);
byte &= ~(1 << 7);
pm_iowrite(0xd3, byte);
/* disable the GPIO40 as CLKREQ3# function */
byte = pm_ioread(0xd4);
byte &= ~(1 << 0);
pm_iowrite(0xd4, byte);
/* enable pull up for GPIO68 */
byte = pm2_ioread(0xf1);
byte &= ~(1 << 4);
pm2_iowrite(0xf1, byte);
/* access the smbus extended register */
sm_dev = pcidev_on_root(0x14, 0);
/*if the dev3 is present, set the gfx to 2x8 lanes*/
/*otherwise set the gfx to 1x16 lanes*/
if(is_dev3_present()){
printk(BIOS_INFO, "Dev3 is present. GFX Configuration is Two x8 slots\n");
/* when the gpio40 is configured as GPIO, this will enable the output */
pci_write_config32(sm_dev, 0xf8, 0x4);
dword = pci_read_config32(sm_dev, 0xfc);
dword &= ~(1 << 10);
/* When the gpio40 is configured as GPIO, this will represent the output value*/
/* 1: enable two x8, 0: master slot enable only */
dword |= (1 << 26);
pci_write_config32(sm_dev, 0xfc, dword);
}else{
printk(BIOS_INFO, "Dev3 is not present. GFX Configuration is One x16 slot\n");
/* when the gpio40 is configured as GPIO, this will enable the output */
pci_write_config32(sm_dev, 0xf8, 0x4);
dword = pci_read_config32(sm_dev, 0xfc);
dword &= ~(1 << 10);
/* When the gpio40 is configured as GPIO, this will represent the output value*/
/* 1: enable two x8, 0: master slot enable only */
dword &= ~(1 << 26);
pci_write_config32(sm_dev, 0xfc, dword);
}
}
/*
* set thermal config
*/
static void set_thermal_config(void)
{
u8 byte;
u16 word;
struct device *sm_dev;
/* set ADT 7461 */
ADT7461_write_byte(0x0B, 0x50); /* Local Temperature Hight limit */
ADT7461_write_byte(0x0C, 0x00); /* Local Temperature Low limit */
ADT7461_write_byte(0x0D, 0x50); /* External Temperature Hight limit High Byte */
ADT7461_write_byte(0x0E, 0x00); /* External Temperature Low limit High Byte */
ADT7461_write_byte(0x19, 0x55); /* External THERM limit */
ADT7461_write_byte(0x20, 0x55); /* Local THERM limit */
byte = ADT7461_read_byte(0x02); /* read status register to clear it */
ARA_read_byte(0x05); /* A hardware alert can only be cleared by the master sending an ARA as a read command */
printk(BIOS_INFO, "Init adt7461 end, status 0x02 %02x\n", byte);
/* sb700 settings for thermal config */
/* set SB700 GPIO 64 to GPIO with pull-up */
byte = pm2_ioread(0x42);
byte &= 0x3f;
pm2_iowrite(0x42, byte);
/* set GPIO 64 to input */
sm_dev = pcidev_on_root(0x14, 0);
word = pci_read_config16(sm_dev, 0x56);
word |= 1 << 7;
pci_write_config16(sm_dev, 0x56, word);
/* set GPIO 64 internal pull-up */
byte = pm2_ioread(0xf0);
byte &= 0xee;
pm2_iowrite(0xf0, byte);
/* set Talert to be active low */
byte = pm_ioread(0x67);
byte &= ~(1 << 5);
pm_iowrite(0x67, byte);
/* set Talert to generate ACPI event */
byte = pm_ioread(0x3c);
byte &= 0xf3;
pm_iowrite(0x3c, byte);
/* THERMTRIP pin */
}
/*************************************************
* enable the dedicated function in tilapia board.
* This function called early than rs780_enable.
*************************************************/
static void mainboard_enable(struct device *dev)
{
printk(BIOS_INFO, "Mainboard TILAPIA Enable. dev=0x%p\n", dev);
set_pcie_dereset();
set_thermal_config();
set_gpio40_gfx();
}
struct chip_operations mainboard_ops = {
.enable_dev = mainboard_enable,
};
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