diff options
Diffstat (limited to 'src/include/device')
| -rw-r--r-- | src/include/device/smbus_host.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/include/device/smbus_host.h b/src/include/device/smbus_host.h new file mode 100644 index 0000000000..2aa160ffbd --- /dev/null +++ b/src/include/device/smbus_host.h @@ -0,0 +1,35 @@ +/* + * 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. + */ + +#ifndef __DEVICE_SMBUS_HOST_H__ +#define __DEVICE_SMBUS_HOST_H__ + +#include <stdint.h> + +/* Low-level SMBUS host controller. */ + +int do_smbus_recv_byte(uintptr_t base, u8 device); +int do_smbus_send_byte(uintptr_t base, u8 device, u8 val); +int do_smbus_read_byte(uintptr_t base, u8 device, u8 address); +int do_smbus_write_byte(uintptr_t base, u8 device, u8 address, u8 data); +int do_smbus_read_word(uintptr_t base, u8 device, u8 address); +int do_smbus_write_word(uintptr_t base, u8 device, u8 address, u16 data); + +int do_smbus_block_read(uintptr_t base, u8 device, u8 cmd, size_t max_bytes, u8 *buf); +int do_smbus_block_write(uintptr_t base, u8 device, u8 cmd, size_t bytes, const u8 *buf); + +/* For Intel, implemented since ICH5. */ +int do_i2c_eeprom_read(uintptr_t base, u8 device, u8 offset, size_t bytes, u8 *buf); +int do_i2c_block_write(uintptr_t base, u8 device, size_t bytes, u8 *buf); + +#endif |