1 /* sst40lf020.c: driver for SST40LF040 flash models.
4 * Copyright 2000 Silicon Integrated System Corporation
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.
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.
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.
22 * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST49lF040 data sheet
24 * ToDo: Consilidated to standard JEDEC code.
31 #include "sst49lf040.h"
33 int erase_49lf040(struct flashchip *flash)
36 int total_size = flash->total_size * 1024;
37 int page_size = flash->page_size;
38 volatile char *bios = flash->virt_addr;
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);
48 int write_49lf040(struct flashchip *flash, unsigned char *buf)
51 int total_size = flash->total_size * 1024;
52 int page_size = flash->page_size;
53 volatile char *bios = flash->virt_addr;
55 printf("Programming Page: ");
56 for (i = 0; i < total_size / page_size; i++) {
57 /* erase the page before programming
58 * Chip erase only works in parallel programming mode
59 * for the 49lf040. Use sector-erase instead */
60 erase_sector_jedec(bios, i * page_size);
62 /* write to the sector */
63 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);
66 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");