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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 <boot/coreboot_tables.h>
#include <cpu/x86/msr.h>
#include <cpu/amd/mtrr.h>
#include <device/pci_def.h>
#include <arch/coreboot_tables.h>
#include <../southbridge/amd/sb700/sb700.h>
#include "chip.h"
#define SMBUS_IO_BASE 0x6000
extern void lb_add_memory_range(struct lb_memory *mem, uint32_t type,
uint64_t start, uint64_t size);
uint64_t uma_memory_base, uma_memory_size;
void set_pcie_dereset(void);
void set_pcie_reset(void);
/*
* Mahogany uses GPIO 6 as PCIe slot reset, GPIO4 as GFX slot reset. We need to
* pull it up before training the slot.
***/
void set_pcie_dereset()
{
u16 word;
device_t sm_dev;
/* GPIO 6 reset PCIe slot, GPIO 4 reset GFX PCIe */
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
word = pci_read_config16(sm_dev, 0xA8);
word |= (1 << 0) | (1 << 2); /* Set Gpio6,4 as output */
word &= ~((1 << 8) | (1 << 10));
pci_write_config16(sm_dev, 0xA8, word);
}
void set_pcie_reset()
{
u16 word;
device_t sm_dev;
/* GPIO 6 reset PCIe slot, GPIO 4 reset GFX PCIe */
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
word = pci_read_config16(sm_dev, 0xA8);
word &= ~((1 << 0) | (1 << 2)); /* Set Gpio6,4 as output */
word &= ~((1 << 8) | (1 << 10));
pci_write_config16(sm_dev, 0xA8, word);
}
#if 0 /* not tested yet */
/********************************************************
* mahogany uses SB700 GPIO9 to detect IDE_DMA66.
* IDE_DMA66 is routed to GPIO 9. So we read Gpio 9 to
* get the cable type, 40 pin or 80 pin?
********************************************************/
static void get_ide_dma66(void)
{
u8 byte;
/*u32 sm_dev, ide_dev; */
device_t sm_dev, ide_dev;
sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0));
byte = pci_read_config8(sm_dev, 0xA9);
byte |= (1 << 5); /* Set Gpio9 as input */
pci_write_config8(sm_dev, 0xA9, byte);
ide_dev = dev_find_slot(0, PCI_DEVFN(0x14, 1));
byte = pci_read_config8(ide_dev, 0x56);
byte &= ~(7 << 0);
if ((1 << 5) & pci_read_config8(sm_dev, 0xAA))
byte |= 2 << 0; /* mode 2 */
else
byte |= 5 << 0; /* mode 5 */
pci_write_config8(ide_dev, 0x56, byte);
}
#endif /* get_ide_dma66 */
/*************************************************
* enable the dedicated function in mahogany board.
* This function called early than rs780_enable.
*************************************************/
static void mahogany_enable(device_t dev)
{
/* Leave it for future. */
/* struct mainboard_config *mainboard =
(struct mainboard_config *)dev->chip_info;*/
printk(BIOS_INFO, "Mainboard MAHOGANY 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);
/* refer to UMA Size Consideration in 780 BDG. */
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(); */
}
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("AMD MAHOGANY Mainboard")
.enable_dev = mahogany_enable,
};
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