diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/imc.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/imc.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/imc.c b/src/soc/amd/stoneyridge/imc.c new file mode 100644 index 0000000000..b4e1d9d53a --- /dev/null +++ b/src/soc/amd/stoneyridge/imc.c @@ -0,0 +1,101 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 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. + */ + +#define __SIMPLE_DEVICE__ + +#include <soc/imc.h> +#include <arch/io.h> +#include <device/device.h> +#include <delay.h> +#include <Porting.h> +#include <AGESA.h> +#include <Lib/amdlib.h> +#include <Proc/Fch/Common/FchCommonCfg.h> +#include <Proc/Fch/Fch.h> +#include <Proc/Fch/FchPlatform.h> + +#define VACPI_MMIO_VBASE ((u8 *)ACPI_MMIO_BASE) + +void imc_reg_init(void) +{ + u8 reg8; + /* Init Power Management Block 2 (PM2) Registers. + * Check BKDG for AMD Family 16h for details. */ + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x00), 0x06); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x01), 0x06); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x02), 0xf7); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x03), 0xff); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x04), 0xff); + + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x10), 0x06); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x11), 0x06); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x12), 0xf7); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x13), 0xff); + write8((VACPI_MMIO_VBASE + PMIO2_BASE + 0x14), 0xff); + + reg8 = pci_read_config8(PCI_DEV(0, 0x18, 0x3), 0x1E4); + reg8 &= 0x8F; + reg8 |= 0x10; + pci_write_config8(PCI_DEV(0, 0x18, 0x3), 0x1E4, reg8); +} + +#ifndef __PRE_RAM__ +void enable_imc_thermal_zone(void) +{ + AMD_CONFIG_PARAMS StdHeader; + UINT8 FunNum; + UINT8 regs[9]; + int i; + + regs[0] = 0; + regs[1] = 0; + FunNum = Fun_80; + for (i = 0; i <= 1; i++) + WriteECmsg(MSG_REG0 + i, AccessWidth8, ®s[i], &StdHeader); + WriteECmsg(MSG_SYS_TO_IMC, AccessWidth8, &FunNum, &StdHeader); + WaitForEcLDN9MailboxCmdAck(&StdHeader); + + for (i = 2; i <= 9; i++) + ReadECmsg(MSG_REG0 + i, AccessWidth8, ®s[i], &StdHeader); + + /* enable thermal zone 0 */ + regs[2] |= 1; + regs[0] = 0; + regs[1] = 0; + FunNum = Fun_81; + for (i = 0; i <= 9; i++) + WriteECmsg(MSG_REG0 + i, AccessWidth8, ®s[i], &StdHeader); + WriteECmsg(MSG_SYS_TO_IMC, AccessWidth8, &FunNum, &StdHeader); + WaitForEcLDN9MailboxCmdAck(&StdHeader); +} +#endif + +/* Bettong Hardware Monitor Fan Control + * Hardware limitation: + * HWM will fail to read the input temperature via I2C if other + * software switches the I2C address. AMD recommends using IMC + * to control fans, instead of HWM. + */ +void oem_fan_control(FCH_DATA_BLOCK *FchParams) +{ + /* Enable IMC fan control. the recommand way */ + imc_reg_init(); + + FchParams->Imc.ImcEnable = TRUE; + FchParams->Hwm.HwmControl = 1; /* 1 IMC, 0 HWM */ + FchParams->Imc.ImcEnableOverWrite = 1; /* 2 disable IMC, 1 enable IMC, 0 following hw strap setting */ + + LibAmdMemFill(&(FchParams->Imc.EcStruct), 0, sizeof(FCH_EC), FchParams->StdHeader); +} |