2 * This file is part of the coreboot project.
4 * Copyright (C) 2004 Tyan Computer
5 * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
6 * Copyright (C) 2006,2007 AMD
7 * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 #define SMBUS0_IO_BASE 0x1000
27 #define SMBUS1_IO_BASE (0x1000+(1<<8))
30 static void enable_smbus(void)
33 dev = pci_locate_device(PCI_ID(0x10de, 0x0368), 0);
35 if (dev == PCI_DEV_INVALID)
36 die("SMBus controller not found\n");
38 /* set smbus iobase */
39 pci_write_config32(dev, 0x20, SMBUS0_IO_BASE | 1);
40 pci_write_config32(dev, 0x24, SMBUS1_IO_BASE | 1);
41 /* Set smbus iospace enable */
42 pci_write_config16(dev, 0x4, 0x01);
43 /* clear any lingering errors, so the transaction will run */
44 outb(inb(SMBUS0_IO_BASE + SMBHSTSTAT), SMBUS0_IO_BASE + SMBHSTSTAT);
45 outb(inb(SMBUS1_IO_BASE + SMBHSTSTAT), SMBUS1_IO_BASE + SMBHSTSTAT);
48 static inline int smbus_recv_byte(unsigned device)
50 return do_smbus_recv_byte(SMBUS0_IO_BASE, device);
53 static inline int smbus_send_byte(unsigned device, unsigned char val)
55 return do_smbus_send_byte(SMBUS0_IO_BASE, device, val);
58 static inline int smbus_read_byte(unsigned device, unsigned address)
60 return do_smbus_read_byte(SMBUS0_IO_BASE, device, address);
63 static inline int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
65 return do_smbus_write_byte(SMBUS0_IO_BASE, device, address, val);
68 static inline int smbusx_recv_byte(unsigned smb_index, unsigned device)
70 return do_smbus_recv_byte(SMBUS0_IO_BASE + (smb_index<<8), device);
73 static inline int smbusx_send_byte(unsigned smb_index, unsigned device, unsigned char val)
75 return do_smbus_send_byte(SMBUS0_IO_BASE + (smb_index<<8), device, val);
78 static inline int smbusx_read_byte(unsigned smb_index, unsigned device, unsigned address)
80 return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address);
83 static inline int smbusx_write_byte(unsigned smb_index, unsigned device, unsigned address, unsigned char val)
85 return do_smbus_write_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address, val);