/* * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH * * 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. */ #include <arch/io.h> #include <console/console.h> #include <device/pci_ids.h> #include <device/pci_def.h> #include "pch.h" #include "smbus.h" void enable_smbus(void) { device_t dev; /* Set the SMBus device statically. */ dev = PCI_DEV(0x0, 0x1f, 0x3); /* Check to make sure we've got the right device. */ if (pci_read_config16(dev, 0x0) != 0x8086) { die("SMBus controller not found!"); } /* Set SMBus I/O base. */ pci_write_config32(dev, SMB_BASE, SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO); /* Set SMBus enable. */ pci_write_config8(dev, HOSTC, HST_EN); /* Set SMBus I/O space enable. */ pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO); /* Disable interrupt generation. */ outb(0, SMBUS_IO_BASE + SMBHSTCTL); /* Clear any lingering errors, so transactions can run. */ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); printk(BIOS_DEBUG, "SMBus controller enabled.\n"); } int smbus_read_byte(unsigned device, unsigned address) { return do_smbus_read_byte(SMBUS_IO_BASE, device, address); } int smbus_write_byte(unsigned device, unsigned address, u8 data) { return do_smbus_write_byte(SMBUS_IO_BASE, device, address, data); } int smbus_block_read(unsigned device, unsigned cmd, u8 bytes, u8 *buf) { return do_smbus_block_read(SMBUS_IO_BASE, device, cmd, bytes, buf); } int smbus_block_write(unsigned device, unsigned cmd, u8 bytes, const u8 *buf) { return do_smbus_block_write(SMBUS_IO_BASE, device, cmd, bytes, buf); }