1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* sst40lf020.c: driver for SST40LF040 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.
*
* $Id$
*/
#include <stdio.h>
#include "flash.h"
#include "jedec.h"
#include "sst49lf040.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
int write_49lf040 (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;
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);
}
|
