/* * This file is part of the coreboot project. * * Copyright (C) 2007 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 version 2 as * published by the Free Software Foundation. * * 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 <arch/io.h> #include "cs5536.h" #include "smbus.h" /* initialization for SMBus Controller */ void cs5536_enable_smbus(void) { if (IS_ENABLED(CONFIG_NO_EARLY_SMBUS)) return; /* Set SCL freq and enable SMB controller */ /*outb((0x20 << 1) | SMB_CTRL2_ENABLE, smbus_io_base + SMB_CTRL2); */ outb((0x7F << 1) | SMB_CTRL2_ENABLE, SMBUS_IO_BASE + SMB_CTRL2); /* Setup SMBus host controller address to 0xEF */ outb((0xEF | SMB_ADD_SAEN), SMBUS_IO_BASE + SMB_ADD); } int smbus_read_byte(unsigned device, unsigned address) { return do_smbus_read_byte(SMBUS_IO_BASE, device, address); }