blob: f19b91e1c256c1c6903c143b6713041e586ba0bf [file] [log] [blame]
David Hendricks3770a112004-03-17 21:47:30 +00001/* sst40lf020.c: driver for SST40LF040 flash models.
2 *
3 *
4 * Copyright 2000 Silicon Integrated System Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * Reference:
22 * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST49lF040 data sheet
23 *
Ollie Lhocf29de82004-03-18 19:40:07 +000024 * ToDo: Consilidated to standard JEDEC code.
25 *
David Hendricks3770a112004-03-17 21:47:30 +000026 * $Id$
27 */
David Hendricks3770a112004-03-17 21:47:30 +000028#include <stdio.h>
29#include "flash.h"
30#include "jedec.h"
31#include "sst49lf040.h"
32
Ollie Lhoa1439cf2005-01-11 02:48:22 +000033int erase_49lf040(struct flashchip *flash)
34{
35 int i;
36 int total_size = flash->total_size * 1024;
37 int page_size = flash->page_size;
38 volatile char *bios = flash->virt_addr;
39
40 for (i = 0; i < total_size / page_size; i++) {
41 /* Chip erase only works in parallel programming mode
42 * for the 49lf040. Use sector-erase instead */
43 erase_sector_jedec(bios, i * page_size);
44 }
45 return 0;
46}
47
Ollie Lho761bf1b2004-03-20 16:46:10 +000048int write_49lf040(struct flashchip *flash, unsigned char *buf)
David Hendricks3770a112004-03-17 21:47:30 +000049{
50 int i;
Ollie Lho8b8897a2004-03-27 00:18:15 +000051 int total_size = flash->total_size * 1024;
52 int page_size = flash->page_size;
Ollie Lho761bf1b2004-03-20 16:46:10 +000053 volatile char *bios = flash->virt_addr;
David Hendricks3770a112004-03-17 21:47:30 +000054
Ollie Lho761bf1b2004-03-20 16:46:10 +000055 printf("Programming Page: ");
56 for (i = 0; i < total_size / page_size; i++) {
Ollie Lho73eca802004-03-19 22:10:07 +000057 /* erase the page before programming
Ollie Lhoa1439cf2005-01-11 02:48:22 +000058 * Chip erase only works in parallel programming mode
59 * for the 49lf040. Use sector-erase instead */
Ollie Lho73eca802004-03-19 22:10:07 +000060 erase_sector_jedec(bios, i * page_size);
David Hendricks3770a112004-03-17 21:47:30 +000061
62 /* write to the sector */
Ollie Lho761bf1b2004-03-20 16:46:10 +000063 printf("%04d at address: 0x%08x ", i, i * page_size);
64 write_sector_jedec(bios, buf + i * page_size,
65 bios + i * page_size, page_size);
Ollie Lho8b8897a2004-03-27 00:18:15 +000066 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");
Ollie Lho761bf1b2004-03-20 16:46:10 +000067 fflush(stdout);
David Hendricks3770a112004-03-17 21:47:30 +000068 }
69 printf("\n");
70
Ollie Lho761bf1b2004-03-20 16:46:10 +000071 return (0);
David Hendricks3770a112004-03-17 21:47:30 +000072}