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ef3ac8ac17
This includes PMC Pm49*, SST 49LF00*, ST M50* and Winbond W39* families. The erase and write test status bits of all affected chips have been reset. Corresponding to flashrom svn r1833. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com>
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* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
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* Copyright (C) 2013 Stefan Tauner
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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/*
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* All ST M50 chips are locked on startup. Most of them have a uniform 64 kB block layout, but some have
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* a non-uniform block/sector segmentation which has to be handled with more care. Some of the non-uniform
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* chips support erasing of the 4 kB sectors with another command.
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*/
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#include "flash.h"
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#include "chipdrivers.h"
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static int stm50_erase_sector(struct flashctx *flash, unsigned int addr)
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{
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chipaddr bios = flash->virtual_memory + addr;
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// clear status register
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chip_writeb(flash, 0x50, bios);
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// now start it
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chip_writeb(flash, 0x32, bios);
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chip_writeb(flash, 0xd0, bios);
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programmer_delay(10);
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uint8_t status = wait_82802ab(flash);
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print_status_82802ab(status);
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return status == 0x80;
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}
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/* Some ST M50* chips do support erasing of sectors. This function will derive the erase function to use from
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* the length of the of the block. For calls that apparently do not address a sector (but a block) we just call
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* the block erase function instead. FIXME: This duplicates the behavior of the remaining erasers for blocks and
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* might be fixed when flashrom supports multiple functions per eraser or erasers that do erase parts of the
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* chip only. */
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int erase_sector_stm50(struct flashctx *flash, unsigned int addr, unsigned int len)
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{
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if (len == 4096)
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return stm50_erase_sector(flash, addr);
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else
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return erase_block_82802ab(flash, addr, len);
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}
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