a4868c44b5
Powerdown) SPI command to flashrom to identify older SPI chips which can't handle JEDEC RDID. Since RES gives a one-byte identifier which is shared among many different vendors and even different sizes, we want to match RES as a last resort if RDID returns 0xff 0xff 0xff. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Peter Stuge <peter@stuge.se> This is a heavily reworked version of a patch by Fredrik Tolf, which was Signed-off-by: Fredrik Tolf <fredrik@dolda2000.com> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3320 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2007, 2008 Carl-Daniel Hailfinger
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __SPI_H__
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#define __SPI_H__ 1
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/*
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* Contains the generic SPI headers
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*/
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/* Read Electronic ID */
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#define JEDEC_RDID 0x9f
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#define JEDEC_RDID_OUTSIZE 0x01
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#define JEDEC_RDID_INSIZE 0x03
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/* Read Electronic Signature */
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#define JEDEC_RES 0xab
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#define JEDEC_RES_OUTSIZE 0x04
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#define JEDEC_RES_INSIZE 0x01
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/* Write Enable */
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#define JEDEC_WREN 0x06
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#define JEDEC_WREN_OUTSIZE 0x01
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#define JEDEC_WREN_INSIZE 0x00
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/* Write Disable */
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#define JEDEC_WRDI 0x04
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#define JEDEC_WRDI_OUTSIZE 0x01
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#define JEDEC_WRDI_INSIZE 0x00
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/* Chip Erase 0x60 is supported by Macronix/SST chips. */
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#define JEDEC_CE_60 0x60
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#define JEDEC_CE_60_OUTSIZE 0x01
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#define JEDEC_CE_60_INSIZE 0x00
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/* Chip Erase 0xc7 is supported by ST/EON/Macronix chips. */
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#define JEDEC_CE_C7 0xc7
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#define JEDEC_CE_C7_OUTSIZE 0x01
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#define JEDEC_CE_C7_INSIZE 0x00
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/* Block Erase 0x52 is supported by SST chips. */
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#define JEDEC_BE_52 0x52
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#define JEDEC_BE_52_OUTSIZE 0x04
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#define JEDEC_BE_52_INSIZE 0x00
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/* Block Erase 0xd8 is supported by EON/Macronix chips. */
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#define JEDEC_BE_D8 0xd8
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#define JEDEC_BE_D8_OUTSIZE 0x04
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#define JEDEC_BE_D8_INSIZE 0x00
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/* Sector Erase 0x20 is supported by Macronix/SST chips. */
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#define JEDEC_SE 0x20
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#define JEDEC_SE_OUTSIZE 0x04
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#define JEDEC_SE_INSIZE 0x00
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/* Read Status Register */
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#define JEDEC_RDSR 0x05
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#define JEDEC_RDSR_OUTSIZE 0x01
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#define JEDEC_RDSR_INSIZE 0x01
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#define JEDEC_RDSR_BIT_WIP (0x01 << 0)
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/* Write Status Register */
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#define JEDEC_WRSR 0x01
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#define JEDEC_WRSR_OUTSIZE 0x02
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#define JEDEC_WRSR_INSIZE 0x00
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/* Read the memory */
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#define JEDEC_READ 0x03
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#define JEDEC_READ_OUTSIZE 0x04
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/* JEDEC_READ_INSIZE : any length */
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/* Write memory byte */
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#define JEDEC_BYTE_PROGRAM 0x02
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#define JEDEC_BYTE_PROGRAM_OUTSIZE 0x05
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#define JEDEC_BYTE_PROGRAM_INSIZE 0x00
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#endif /* !__SPI_H__ */
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