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/*
* sst39sf020.c: driver for SST28SF040C 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, SST28SF040 data sheet
*
* ToDo: Consilidated to standard JEDEC code.
*
* $Id$
*/
#include <stdio.h>
#include "flash.h"
#include "jedec.h"
#include "sst39sf020.h"
#define AUTO_PG_ERASE1 0x20
#define AUTO_PG_ERASE2 0xD0
#define AUTO_PGRM 0x10
#define CHIP_ERASE 0x30
#define RESET 0xFF
#define READ_ID 0x90
static __inline__ int erase_sector_39sf020(volatile char *bios,
unsigned long address)
{
*bios = AUTO_PG_ERASE1;
*(bios + address) = AUTO_PG_ERASE2;
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
return (0);
}
int write_39sf020(struct flashchip *flash, unsigned char *buf)
{
int i;
int total_size = flash->total_size * 1024, page_size =
flash->page_size;
volatile char *bios = flash->virt_addr;
erase_chip_jedec(flash);
printf("Programming Page: ");
for (i = 0; i < total_size / page_size; i++) {
/* erase the page before programming */
//erase_sector_39sf020(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");
fflush(stdout);
}
printf("\n");
return (0);
}
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