| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2004 Tyan Computer |
| * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer. |
| * Copyright (C) 2006,2007 AMD |
| * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD. |
| * |
| * 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; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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 "smbus.h" |
| |
| #define SMBUS0_IO_BASE 0x1000 |
| #define SMBUS1_IO_BASE (0x1000 + (1 << 8)) |
| /* Size: 0x40 */ |
| |
| static void enable_smbus(void) |
| { |
| device_t dev; |
| dev = pci_locate_device(PCI_ID(0x10de, 0x0368), 0); |
| |
| if (dev == PCI_DEV_INVALID) |
| die("SMBus controller not found\n"); |
| |
| /* Set SMBus I/O base. */ |
| pci_write_config32(dev, 0x20, SMBUS0_IO_BASE | 1); |
| pci_write_config32(dev, 0x24, SMBUS1_IO_BASE | 1); |
| |
| /* Set SMBus I/O space enable. */ |
| pci_write_config16(dev, 0x4, 0x01); |
| |
| /* Clear any lingering errors, so the transaction will run. */ |
| outb(inb(SMBUS0_IO_BASE + SMBHSTSTAT), SMBUS0_IO_BASE + SMBHSTSTAT); |
| outb(inb(SMBUS1_IO_BASE + SMBHSTSTAT), SMBUS1_IO_BASE + SMBHSTSTAT); |
| } |
| |
| static inline int smbus_recv_byte(unsigned device) |
| { |
| return do_smbus_recv_byte(SMBUS0_IO_BASE, device); |
| } |
| |
| static inline int smbus_send_byte(unsigned device, unsigned char val) |
| { |
| return do_smbus_send_byte(SMBUS0_IO_BASE, device, val); |
| } |
| |
| static inline int smbus_read_byte(unsigned device, unsigned address) |
| { |
| return do_smbus_read_byte(SMBUS0_IO_BASE, device, address); |
| } |
| |
| static inline int smbus_write_byte(unsigned device, unsigned address, |
| unsigned char val) |
| { |
| return do_smbus_write_byte(SMBUS0_IO_BASE, device, address, val); |
| } |
| |
| static inline int smbusx_recv_byte(unsigned smb_index, unsigned device) |
| { |
| return do_smbus_recv_byte(SMBUS0_IO_BASE + (smb_index << 8), device); |
| } |
| |
| static inline int smbusx_send_byte(unsigned smb_index, unsigned device, |
| unsigned char val) |
| { |
| return do_smbus_send_byte(SMBUS0_IO_BASE + (smb_index << 8), |
| device, val); |
| } |
| |
| static inline int smbusx_read_byte(unsigned smb_index, unsigned device, |
| unsigned address) |
| { |
| return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index << 8), |
| device, address); |
| } |
| |
| static inline int smbusx_write_byte(unsigned smb_index, unsigned device, |
| unsigned address, unsigned char val) |
| { |
| return do_smbus_write_byte(SMBUS0_IO_BASE + (smb_index << 8), |
| device, address, val); |
| } |