| /* |
| * 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" |
| |
| |
| uint64_t uma_memory_base, uma_memory_size; |
| |
| 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); |
| } |
| |
| #if 0 /* TODO: */ |
| /******************************************************** |
| * tilapia uses SB700 GPIO8 to detect IDE_DMA66. |
| * IDE_DMA66 is routed to GPIO 8. So we read Gpio 8 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 << 4); /* Set Gpio8 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 << 4) & 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 |
| |
| /* |
| * 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); |
| |
| #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_thermal_config(); */ |
| } |
| |
| struct chip_operations mainboard_ops = { |
| CHIP_NAME("ASUS M4A78-EM Mainboard") |
| .enable_dev = m4a78em_enable, |
| }; |