f694db9380
by Roman Kononov <kononov195-lbl@yahoo.com>. X-Signed-Off-By: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2448 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/* sst49lf040.c: driver for SST49LF040 flash models.
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*
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*
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* Copyright 2000 Silicon Integrated System Corporation
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Reference:
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* 4 MEgabit (512K x 8) SuperFlash EEPROM, SST49lF040 data sheet
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*
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* ToDo: Consilidated to standard JEDEC code.
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*
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*/
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#include <stdio.h>
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#include "flash.h"
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#include "jedec.h"
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#include "sst49lf040.h"
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int erase_49lf040(struct flashchip *flash)
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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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int page_size = flash->page_size;
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volatile uint8_t *bios = flash->virt_addr;
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for (i = 0; i < total_size / page_size; i++) {
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/* Chip erase only works in parallel programming mode
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* for the 49lf040. Use sector-erase instead */
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erase_sector_jedec(bios, i * page_size);
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}
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return 0;
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}
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int write_49lf040(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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int page_size = flash->page_size;
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volatile uint8_t *bios = flash->virt_addr;
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printf("Programming Page: ");
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for (i = 0; i < total_size / page_size; i++) {
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/* erase the page before programming
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* Chip erase only works in parallel programming mode
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* for the 49lf040. Use sector-erase instead */
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erase_sector_jedec(bios, i * page_size);
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/* write to the sector */
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printf("%04d at address: 0x%08x ", i, i * page_size);
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write_sector_jedec(bios, buf + i * page_size,
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bios + i * page_size, page_size);
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printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
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fflush(stdout);
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}
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printf("\n");
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return (0);
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}
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