/* * pm49fl004.c: driver for Pm49FL004 flash models. * * * Copyright 2004 Tyan 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. * * */ #include <stdio.h> #include "flash.h" #include "jedec.h" #include "pm49fl004.h" static __inline__ int erase_block_49fl004(volatile unsigned char *bios, unsigned long address) { volatile unsigned char *Temp; Temp = bios + 0x5555; /* set up address to be C000:5555h */ *Temp = 0xAA; /* write data 0xAA to the address */ myusec_delay(10); Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */ *Temp = 0x55; /* write data 0x55 to the address */ myusec_delay(10); Temp = bios + 0x5555; /* set up address to be C000:5555h */ *Temp = 0x80; /* write data 0x80 to the address */ myusec_delay(10); Temp = bios + 0x5555; /* set up address to be C000:5555h */ *Temp = 0xAA; /* write data 0xAA to the address */ myusec_delay(10); Temp = bios + 0x2AAA; /* set up address to be C000:2AAAh */ *Temp = 0x55; /* write data 0x55 to the address */ myusec_delay(10); Temp = bios + address; /* set up address to be C000:5555h */ *Temp = 0x50; /* write data 0x50 to the address */ /* wait for Toggle bit ready */ toggle_ready_jedec(bios); return (0); } int write_49fl004(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 */ erase_block_49fl004(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"); fflush(stdout); } printf("\n"); return (0); }