/* 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 #include "flash.h" #include "jedec.h" #include "sst49lf040.h" int erase_49lf040(struct flashchip *flash) { int i; int total_size = flash->total_size * 1024; int page_size = flash->page_size; volatile uint8_t *bios = flash->virt_addr; for (i = 0; i < total_size / page_size; i++) { /* Chip erase only works in parallel programming mode * for the 49lf040. Use sector-erase instead */ erase_sector_jedec(bios, i * page_size); } return 0; } int write_49lf040(struct flashchip *flash, uint8_t *buf) { int i; int total_size = flash->total_size * 1024; int page_size = flash->page_size; volatile uint8_t *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 */ if(i&0xfff==0xfff) printf("%04d at address: 0x%08x ", i, i * page_size); write_sector_jedec(bios, buf + i * page_size, bios + i * page_size, page_size); if(i&0xfff==0xfff) 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); }