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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 Alec Ari <neotheuser@ymail.com>
*
* 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 <boot/tables.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"
uint64_t uma_memory_base, uma_memory_size;
void set_pcie_dereset(void);
void set_pcie_reset(void);
int 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);
}
/*
* dev3 does not exist on ma785gm
*/
int is_dev3_present(void)
{
return 0;
}
/*
* set gpio40 gfx
*/
static void set_gpio40_gfx(void)
{
u8 byte;
// u16 word;
u32 dword;
device_t 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 = dev_find_slot(0, PCI_DEVFN(0x14, 0));
/* set the gfx to 1x16 lanes */
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);
}
/*************************************************
* enable the dedicated function in ma785gm board.
* This function called early than rs780_enable.
*************************************************/
static void ma785gm_enable(device_t dev)
{
printk(BIOS_INFO, "Mainboard MA785GM-US2H Enable. dev=0x%p\n", dev);
#if (CONFIG_GFXUMA == 1)
msr_t msr, msr2;
/* TOP_MEM: the top of DRAM below 4G */
msr = rdmsr(TOP_MEM);
printk(BIOS_INFO,
"%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
__func__, msr.lo, msr.hi);
/* TOP_MEM2: the top of DRAM above 4G */
msr2 = rdmsr(TOP_MEM2);
printk(BIOS_INFO,
"%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
__func__, msr2.lo, msr2.hi);
switch (msr.lo) {
case 0x10000000: /* 256M system memory */
uma_memory_size = 0x4000000; /* 64M recommended UMA */
break;
case 0x20000000: /* 512M system memory */
uma_memory_size = 0x8000000; /* 128M recommended UMA */
break;
default: /* 1GB and above system memory */
uma_memory_size = 0x10000000; /* 256M recommended UMA */
break;
}
uma_memory_base = msr.lo - uma_memory_size; /* TOP_MEM1 */
printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
__func__, uma_memory_size, uma_memory_base);
/* TODO: TOP_MEM2 */
#else
uma_memory_size = 0x8000000; /* 128M recommended UMA */
uma_memory_base = 0x38000000; /* 1GB system memory supposed */
#endif
set_pcie_dereset();
/* get_ide_dma66(); */
set_gpio40_gfx();
}
int add_mainboard_resources(struct lb_memory *mem)
{
/* UMA is removed from system memory in the northbridge code, but
* in some circumstances we want the memory mentioned as reserved.
*/
#if (CONFIG_GFXUMA == 1)
printk(BIOS_INFO, "uma_memory_start=0x%llx, uma_memory_size=0x%llx \n",
uma_memory_base, uma_memory_size);
lb_add_memory_range(mem, LB_MEM_RESERVED, uma_memory_base,
uma_memory_size);
#endif
return 0;
}
struct chip_operations mainboard_ops = {
CHIP_NAME("GIGABYTE MA785GM-US2H Mainboard")
.enable_dev = ma785gm_enable,
};
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