| /* |
| * This file is part of the coreboot project. |
| * |
| * 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 "amd8111_smbus.h" |
| |
| #define SMBUS_IO_BASE 0x0f00 |
| |
| static void enable_smbus(void) |
| { |
| pci_devfn_t dev; |
| uint8_t enable; |
| |
| dev = pci_locate_device(PCI_ID(0x1022, 0x746b), 0); |
| if (dev == PCI_DEV_INVALID) { |
| die("SMBUS controller not found\n"); |
| } |
| |
| pci_write_config32(dev, 0x58, SMBUS_IO_BASE | 1); |
| enable = pci_read_config8(dev, 0x41); |
| pci_write_config8(dev, 0x41, enable | (1 << 7)); |
| |
| /* check that we can see the smbus controller I/O. */ |
| if (inw(SMBUS_IO_BASE)==0xFF){ |
| die("SMBUS controller I/O not found\n"); |
| } |
| |
| /* clear any lingering errors, so the transaction will run */ |
| outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS); |
| printk(BIOS_SPEW, "SMBus controller enabled\n"); |
| } |
| |
| static inline int smbus_recv_byte(unsigned device) |
| { |
| return do_smbus_recv_byte(SMBUS_IO_BASE, device); |
| } |
| |
| static inline int smbus_send_byte(unsigned device, unsigned char val) |
| { |
| return do_smbus_send_byte(SMBUS_IO_BASE, device, val); |
| } |
| |
| static inline int smbus_read_byte(unsigned device, unsigned address) |
| { |
| return do_smbus_read_byte(SMBUS_IO_BASE, device, address); |
| } |
| |
| static inline int smbus_write_byte(unsigned device, unsigned address, unsigned char val) |
| { |
| return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val); |
| } |
| |
| static inline int smbus_block_read(unsigned device, unsigned cmd, u8 bytes, u8 *buf) |
| { |
| return do_smbus_block_read(SMBUS_IO_BASE, device, cmd, bytes, buf); |
| } |
| |
| static inline 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); |
| } |