blob: 401247a6df4e7c64e75a35411288982034abcdc8 [file] [log] [blame]
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +00001/*
2 * sst39sf020.c: driver for SST28SF040C flash models.
3 *
4 *
5 * Copyright 2000 Silicon Integrated System Corporation
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 *
22 * Reference:
23 * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST28SF040 data sheet
24 *
Ollie Lhocf29de82004-03-18 19:40:07 +000025 * ToDo: Consilidated to standard JEDEC code.
26 *
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000027 * $Id$
28 */
29
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000030#include <stdio.h>
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000031#include "flash.h"
32#include "jedec.h"
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000033#include "sst39sf020.h"
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000034
35#define AUTO_PG_ERASE1 0x20
36#define AUTO_PG_ERASE2 0xD0
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000037
Ollie Lho761bf1b2004-03-20 16:46:10 +000038static __inline__ int erase_sector_39sf020(volatile char *bios,
39 unsigned long address)
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000040{
41 *bios = AUTO_PG_ERASE1;
42 *(bios + address) = AUTO_PG_ERASE2;
43
44 /* wait for Toggle bit ready */
45 toggle_ready_jedec(bios);
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000046
Ollie Lho761bf1b2004-03-20 16:46:10 +000047 return (0);
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000048}
49
Ollie Lho761bf1b2004-03-20 16:46:10 +000050int write_39sf020(struct flashchip *flash, unsigned char *buf)
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000051{
52 int i;
Ollie Lho761bf1b2004-03-20 16:46:10 +000053 int total_size = flash->total_size * 1024, page_size =
54 flash->page_size;
55 volatile char *bios = flash->virt_addr;
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000056
Ollie Lho761bf1b2004-03-20 16:46:10 +000057 erase_chip_jedec(flash);
Ollie Lhocf29de82004-03-18 19:40:07 +000058
Ollie Lho761bf1b2004-03-20 16:46:10 +000059 printf("Programming Page: ");
60 for (i = 0; i < total_size / page_size; i++) {
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000061 /* erase the page before programming */
62 //erase_sector_39sf020(bios, i * page_size);
63
64 /* write to the sector */
Ollie Lho761bf1b2004-03-20 16:46:10 +000065 printf("%04d at address: 0x%08x", i, i * page_size);
66 write_sector_jedec(bios, buf + i * page_size,
67 bios + i * page_size, page_size);
68 printf
69 ("\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");
70 fflush(stdout);
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000071 }
72 printf("\n");
73
Ollie Lho761bf1b2004-03-20 16:46:10 +000074 return (0);
Ronald G. Minnich5e8dfff2002-03-21 22:41:11 +000075}