ad9bdb4345
Fully tested for Probe/Read/Erase/Write on EN29F002NT. Jedec subroutines 'probe_jedec()' and 'erase_chip_jedec()' are still in use, but a tailored 'write_en29f002a()' is needed due to a byte wise writing mechanism for this chip. Signed-off-by: Mats Erik Andersson <mats.andersson@gisladisker.se> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3602 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
125 lines
3.3 KiB
C
125 lines
3.3 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 <stdio.h>
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#include <stdint.h>
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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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volatile uint8_t *bios = flash->virtual_memory;
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uint8_t id1, id2;
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*(volatile uint8_t *)(bios + 0x555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
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*(volatile uint8_t *)(bios + 0x555) = 0x90;
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myusec_delay(10);
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id1 = *(volatile uint8_t *)(bios + 0x100);
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id2 = *(volatile uint8_t *)(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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*(volatile uint8_t *)(bios + 0x555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AA) = 0x55;
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*(volatile uint8_t *)(bios + 0x555) = 0xF0;
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printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, 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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volatile uint8_t *bios = flash->virtual_memory;
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uint8_t id1, id2;
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*(volatile uint8_t *)(bios + 0x555) = 0xAA;
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*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x555) = 0x90;
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myusec_delay(10);
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id1 = *(volatile uint8_t *)(bios + 0x100);
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id2 = *(volatile uint8_t *)(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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*(volatile uint8_t *)(bios + 0x555) = 0xAA;
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*(volatile uint8_t *)(bios + 0xAAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x555) = 0xF0;
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printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, 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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/* The EN29F002 chip needs repeated single byte writing, no block writing. */
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int write_en29f002a(struct flashchip *flash, uint8_t *buf)
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{
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int i;
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int total_size = flash->total_size * 1024;
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volatile uint8_t *bios = flash->virtual_memory;
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volatile uint8_t *dst = bios;
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// *bios = 0xF0;
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myusec_delay(10);
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erase_chip_jedec(flash);
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printf("Programming page: ");
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for (i = 0; i < total_size; i++) {
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/* write to the sector */
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if ((i & 0xfff) == 0)
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printf("address: 0x%08lx", (unsigned long)i);
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*(bios + 0x5555) = 0xAA;
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*(bios + 0x2AAA) = 0x55;
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*(bios + 0x5555) = 0xA0;
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*dst++ = *buf++;
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/* wait for Toggle bit ready */
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toggle_ready_jedec(dst);
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if ((i & 0xfff) == 0)
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printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
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}
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printf("\n");
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return 0;
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}
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