/* * w49f002u.c: driver for Winbond 49F002U 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: * W49F002U data sheet * * ToDo: Consilidated to standard JEDEC code. * * $Id$ */ #include <stdio.h> #include "flash.h" #include "jedec.h" #include "w49f002u.h" int write_49f002(struct flashchip *flash, unsigned char *buf) { int i; int total_size = flash->total_size * 1024; volatile char *bios = flash->virt_addr; volatile char *dst = bios; erase_chip_jedec(flash); printf("Programming Page: "); for (i = 0; i < total_size; i++) { /* write to the sector */ if ((i & 0xfff) == 0) printf("address: 0x%08lx", (unsigned long) i); *(bios + 0x5555) = 0xAA; *(bios + 0x2AAA) = 0x55; *(bios + 0x5555) = 0xA0; *dst++ = *buf++; /* wait for Toggle bit ready */ toggle_ready_jedec(dst); if ((i & 0xfff) == 0) printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); } printf("\n"); return (0); }