diff options
Diffstat (limited to 'src/southbridge/sis/sis966/smbus.h')
| -rw-r--r-- | src/southbridge/sis/sis966/smbus.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/southbridge/sis/sis966/smbus.h b/src/southbridge/sis/sis966/smbus.h new file mode 100644 index 0000000000..087ea47f23 --- /dev/null +++ b/src/southbridge/sis/sis966/smbus.h @@ -0,0 +1,46 @@ +/* + * 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. + * Copyright (C) 2007 Silicon Integrated Systems Corp. (SiS) + * Written by Morgan Tsai <my_tsai@sis.com> for SiS. + * + * 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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <device/smbus_def.h> + +#define SMBHSTSTAT 0x1 +#define SMBHSTPRTCL 0x0 +#define SMBHSTCMD 0x3 +#define SMBXMITADD 0x2 +#define SMBHSTDAT0 0x4 +#define SMBHSTDAT1 0x5 + +/* Between 1-10 seconds, We should never timeout normally + * Longer than this is just painful when a timeout condition occurs. + */ +#define SMBUS_TIMEOUT (100*1000*10) + +int smbus_wait_until_ready(unsigned smbus_io_base); +int smbus_wait_until_done(unsigned smbus_io_base); +int do_smbus_recv_byte(unsigned smbus_io_base, unsigned device); +int do_smbus_send_byte(unsigned smbus_io_base, unsigned device, unsigned char val); +int smbus_read_byte(unsigned device, unsigned address); +int smbus_write_byte(unsigned device, unsigned address, unsigned char val); + |