| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2004 Tyan Computer |
| * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer. |
| * |
| * 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. |
| */ |
| |
| #include <stdint.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ids.h> |
| |
| #include "smbus.h" |
| #include "early_smbus.h" |
| |
| #define SMBUS_BAR_BASE 0x20 |
| #define SMBUS_IO_BASE 0x1000 |
| #define SMBUS_IO_SIZE 0x0040 |
| |
| #define SMBUS_BAR(x) (SMBUS_BAR_BASE + 4 * (x)) |
| #define SMBUS_BASE(x) (SMBUS_IO_BASE + SMBUS_IO_SIZE * (x)) |
| |
| void enable_smbus(void) |
| { |
| device_t dev; |
| |
| dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_NVIDIA, |
| PCI_DEVICE_ID_NVIDIA_CK804_SMB), 0); |
| if (dev == PCI_DEV_INVALID) |
| die("SMBus controller not found\n"); |
| |
| /* Set SMBus I/O base. */ |
| pci_write_config32(dev, SMBUS_BAR(0), SMBUS_BASE(0) | 1); |
| pci_write_config32(dev, SMBUS_BAR(1), SMBUS_BASE(1) | 1); |
| |
| /* Set SMBus I/O space enable. */ |
| pci_write_config16(dev, 0x4, 0x01); |
| |
| /* Clear any lingering errors, so the transaction will run. */ |
| outb(inb(SMBUS_BASE(0) + SMBHSTSTAT), SMBUS_BASE(0) + SMBHSTSTAT); |
| outb(inb(SMBUS_BASE(1) + SMBHSTSTAT), SMBUS_BASE(1) + SMBHSTSTAT); |
| |
| printk(BIOS_DEBUG, "SMBus controller enabled\n"); |
| } |
| |
| int ck804_smbus_read_byte(unsigned bus, unsigned device, unsigned address) |
| { |
| return do_smbus_read_byte(SMBUS_BASE(bus), device, address); |
| } |
| |
| int ck804_smbus_write_byte(unsigned bus, unsigned device, unsigned address, |
| unsigned char val) |
| { |
| return do_smbus_write_byte(SMBUS_BASE(bus), device, address, val); |
| } |
| |
| int smbus_read_byte(unsigned device, unsigned address) |
| { |
| return ck804_smbus_read_byte(0, device, address); |
| } |
| |
| int smbus_write_byte(unsigned device, unsigned address, unsigned char val) |
| { |
| return ck804_smbus_write_byte(0, device, address, val); |
| } |