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c09a2f5387
Change-Id: Ic24a54ab520053e49efcba02bd9fa5b8ce69b20a Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org> Reviewed-on: https://review.coreboot.org/c/flashrom/+/89956 Reviewed-by: Antonio Vázquez Blanco <antoniovazquezblanco@gmail.com> Reviewed-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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* SPDX-FileCopyrightText: 2000 Silicon Integrated System Corporation
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* SPDX-FileCopyrightText: 2012 Rudolf Marek <r.marek@assembler.cz>
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*/
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#include "flash.h"
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#include "parallel.h"
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#include "chipdrivers.h"
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/*
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* WARNING!
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* This chip uses the standard JEDEC addresses in 16-bit mode as word
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* addresses. In byte mode, 0xAAA has to be used instead of 0x555 and
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* 0x555 instead of 0x2AA. Do *not* blindly replace with standard JEDEC
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* functions.
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*/
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/* chunksize is 2 */
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int write_en29lv640b(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int len)
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{
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unsigned int i;
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = flash->virtual_memory + start;
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for (i = 0; i < len; i += 2) {
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0xA0, bios + 0xAAA);
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/* Transfer data from source to destination. */
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chip_writew(flash, (*src) | ((*(src + 1)) << 8 ), dst);
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toggle_ready_jedec(flash, dst);
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#if 0
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/* We only want to print something in the error case. */
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msg_cerr("Value in the flash at address 0x%lx = %#x, want %#x\n",
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(dst - bios), chip_readb(flash, dst), *src);
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#endif
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dst += 2;
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src += 2;
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update_progress(flash, FLASHROM_PROGRESS_WRITE, 2);
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}
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/* FIXME: Ignore errors for now. */
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return 0;
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}
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int probe_en29lv640b(struct flashctx *flash)
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{
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chipaddr bios = flash->virtual_memory;
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uint16_t id1, id2;
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chip_writeb(flash, 0xAA, bios + 0xAAA);
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chip_writeb(flash, 0x55, bios + 0x555);
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chip_writeb(flash, 0x90, bios + 0xAAA);
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programmer_delay(flash, 10);
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id1 = chip_readb(flash, bios + 0x200);
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id1 |= (chip_readb(flash, bios) << 8);
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id2 = chip_readb(flash, bios + 0x02);
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chip_writeb(flash, 0xF0, bios + 0xAAA);
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programmer_delay(flash, 10);
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msg_cdbg("%s: id1 0x%04x, id2 0x%04x\n", __func__, id1, id2);
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if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id)
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return 1;
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return 0;
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}
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