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* This file is part of the flashrom project.
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* Copyright (C) 2000 Silicon Integrated System Corporation
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* Copyright (C) 2012 Rudolf Marek <r.marek@assembler.cz>
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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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* 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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* 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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#include "chipdrivers.h"
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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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int write_en29lv640b(struct flashctx *flash, uint8_t *src, unsigned int start,
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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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/* 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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/* FIXME: Ignore errors for now. */
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int probe_en29lv640b(struct flashctx *flash)
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chipaddr bios = flash->virtual_memory;
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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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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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msg_cdbg("%s: id1 0x%04x, id2 0x%04x\n", __func__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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int erase_en29lv640b(struct flashctx *flash)
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chipaddr bios = flash->virtual_memory;
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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, 0x80, bios + 0xAAA);
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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, 0x10, bios + 0xAAA);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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int block_erase_en29lv640b(struct flashctx *flash, unsigned int start,
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chipaddr bios = flash->virtual_memory;
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chipaddr dst = bios + start;
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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, 0x80, bios + 0xAAA);
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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, 0x30, dst);
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programmer_delay(10);
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toggle_ready_jedec(flash, bios);
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/* FIXME: Check the status register for errors. */
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int block_erase_chip_en29lv640b(struct flashctx *flash, unsigned int address,
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unsigned int blocklen)
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if ((address != 0) || (blocklen != flash->total_size * 1024)) {
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msg_cerr("%s called with incorrect arguments\n", __func__);
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return erase_en29lv640b(flash);