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1c296ca8bc
The deleted function in en29f002a.c is reintroduced as write_by_byte_jedec in jedec.c as it contains no chip-specific instructions. It is not yet used in other chip drivers, as key addresses (0x2AAA/0x5555) are often specified with less bits. After crosschecking datasheets, most of the fixmes can probably be resolved as indicated in them, causing significant code reduction. The common JEDEC code for bytewise programming does not program 0xFF at all. The chips that had a dedicated bytewise flash function which has been changed to write_jedec_1 thus changed flashing behaviour and the "write" test flag has been removed. This applies to: AMD Am29F002BB/Am29F002NBB AMD Am29F002BT/Am29F002NBT (TEST_OK_PREW before) AMIC A29002B AMIC A29002T (TEST_OK_PREW before) EON EN29F002(A)(N)B EON EN29F002(A)(N)T (TEST_OK_PREW before) Macronix MX29F001B (TEST_OK_PREW before) Macronix MX29F001T (TEST_OK_PREW before) Macronix MX29F002B Macronix MX29F002T (TEST_OK_PREW before) Macronix MX29LV040 Similar analysis should be performed for the read id stuff. Corresponding to flashrom svn r785. Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de> Acked-by: Sean Nelson <audiohacked@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
90 lines
2.3 KiB
C
90 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) 2007 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; 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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* EN29F512 has 1C,21
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* EN29F010 has 1C,20
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* EN29F040A has 1C,04
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* EN29LV010 has 1C,6E and uses short F0 reset sequence
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* EN29LV040(A) has 1C,4F and uses short F0 reset sequence
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*/
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#include "flash.h"
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int probe_en29f512(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint8_t id1, id2;
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chip_writeb(0xAA, bios + 0x555);
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chip_writeb(0x55, bios + 0x2AA);
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chip_writeb(0x90, bios + 0x555);
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programmer_delay(10);
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id1 = chip_readb(bios + 0x100);
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id2 = chip_readb(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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chip_writeb(0xAA, bios + 0x555);
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chip_writeb(0x55, bios + 0x2AA);
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chip_writeb(0xF0, bios + 0x555);
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printf_debug("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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return 1;
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return 0;
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}
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/*
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* EN29F002AT has 1C,92
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* EN29F002AB has 1C,97
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*/
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/* This does not seem to function properly for EN29F002NT. */
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int probe_en29f002a(struct flashchip *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint8_t id1, id2;
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chip_writeb(0xAA, bios + 0x555);
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chip_writeb(0x55, bios + 0xAAA);
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chip_writeb(0x90, bios + 0x555);
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programmer_delay(10);
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id1 = chip_readb(bios + 0x100);
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id2 = chip_readb(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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chip_writeb(0xAA, bios + 0x555);
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chip_writeb(0x55, bios + 0xAAA);
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chip_writeb(0xF0, bios + 0x555);
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printf_debug("%s: id1 0x%x, id2 0x%x\n", __func__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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return 1;
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return 0;
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}
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