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/* sst49lf040.c: driver for SST49LF040 flash models.
*
*
* Copyright 2000 Silicon Integrated System Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* Reference:
* 4 MEgabit (512K x 8) SuperFlash EEPROM, SST49lF040 data sheet
*
* ToDo: Consilidated to standard JEDEC code.
*
*/
#include <stdio.h>
#include "flash.h"
#include "jedec.h"
#include "sst49lf040.h"
int erase_49lf040(struct flashchip *flash)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile uint8_t *bios = flash->virt_addr;
for (i = 0; i < total_size / page_size; i++) {
/* Chip erase only works in parallel programming mode
* for the 49lf040. Use sector-erase instead */
erase_sector_jedec(bios, i * page_size);
}
return 0;
}
int write_49lf040(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile uint8_t *bios = flash->virt_addr;
printf("Programming Page: ");
for (i = 0; i < total_size / page_size; i++) {
/* erase the page before programming
* Chip erase only works in parallel programming mode
* for the 49lf040. Use sector-erase instead */
erase_sector_jedec(bios, i * page_size);
/* write to the sector */
printf("%04d at address: 0x%08x ", i, i * page_size);
write_sector_jedec(bios, buf + i * page_size,
bios + i * page_size, page_size);
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");
fflush(stdout);
}
printf("\n");
return (0);
}
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