c01a505282
Datasheets describe the used command as 'I2C Read' but adding the word 'eeprom' in between should avoid further confusion with other block commands. Followups will add a symmetrical pair of commands i2c_block_read() and i2c_block_write() that operate via I2C_EN bit and have a 32 byte size restriction on block transfers. For some hardware revision these block commands are available, while 'I2C Read' was not. Change-Id: I4494ab2985afc7f737ddacc8d706a5d5395e35cf Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/31151 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2005 Yinghai Lu <yinghailu@gmail.com>
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* Copyright (C) 2009 coresystems GmbH
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* Copyright (C) 2013 Vladimir Serbinenko
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef INTEL_COMMON_SMBUS_H
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#define INTEL_COMMON_SMBUS_H
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/* SMBus register offsets. */
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#define SMBHSTSTAT 0x0
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#define SMBHSTCTL 0x2
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#define SMBHSTCMD 0x3
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#define SMBXMITADD 0x4
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#define SMBHSTDAT0 0x5
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#define SMBHSTDAT1 0x6
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#define SMBBLKDAT 0x7
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#define SMBTRNSADD 0x9
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#define SMBSLVDATA 0xa
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#define SMLINK_PIN_CTL 0xe
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#define SMBUS_PIN_CTL 0xf
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#define SMBSLVCMD 0x11
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int do_smbus_read_byte(unsigned int smbus_base, u8 device,
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unsigned int address);
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int do_smbus_write_byte(unsigned int smbus_base, u8 device,
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unsigned int address, unsigned int data);
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int do_smbus_block_read(unsigned int smbus_base, u8 device,
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u8 cmd, unsigned int max_bytes, u8 *buf);
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int do_smbus_block_write(unsigned int smbus_base, u8 device,
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u8 cmd, unsigned int bytes, const u8 *buf);
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/* Only since ICH5 */
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int do_i2c_eeprom_read(unsigned int smbus_base, u8 device,
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unsigned int offset, unsigned int bytes, u8 *buf);
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#endif
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