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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
* Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "flash.h"
#include "chipdrivers.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
static void protect_28sf040(chipaddr bios)
{
chip_readb(bios + 0x1823);
chip_readb(bios + 0x1820);
chip_readb(bios + 0x1822);
chip_readb(bios + 0x0418);
chip_readb(bios + 0x041B);
chip_readb(bios + 0x0419);
chip_readb(bios + 0x040A);
}
static void unprotect_28sf040(chipaddr bios)
{
chip_readb(bios + 0x1823);
chip_readb(bios + 0x1820);
chip_readb(bios + 0x1822);
chip_readb(bios + 0x0418);
chip_readb(bios + 0x041B);
chip_readb(bios + 0x0419);
chip_readb(bios + 0x041A);
}
int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
{
chipaddr bios = flash->virtual_memory;
chip_writeb(AUTO_PG_ERASE1, bios);
chip_writeb(AUTO_PG_ERASE2, bios + address);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
if (check_erased_range(flash, address, sector_size)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
static int write_sector_28sf040(chipaddr bios, uint8_t *src, chipaddr dst,
unsigned int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
/* transfer data from source to destination */
if (*src == 0xFF) {
dst++, src++;
/* If the data is 0xFF, don't program it */
continue;
}
/*issue AUTO PROGRAM command */
chip_writeb(AUTO_PGRM, dst);
chip_writeb(*src++, dst++);
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
}
return 0;
}
static int erase_28sf040(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
unprotect_28sf040(bios);
chip_writeb(CHIP_ERASE, bios);
chip_writeb(CHIP_ERASE, bios);
protect_28sf040(bios);
programmer_delay(10);
toggle_ready_jedec(bios);
if (check_erased_range(flash, 0, flash->total_size * 1024)) {
msg_cerr("ERASE FAILED!\n");
return -1;
}
return 0;
}
int write_28sf040(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
chipaddr bios = flash->virtual_memory;
unprotect_28sf040(bios);
for (i = 0; i < total_size / page_size; i++) {
/* write to the sector */
write_sector_28sf040(bios, buf + i * page_size,
bios + i * page_size, page_size);
}
protect_28sf040(bios);
return 0;
}
int erase_chip_28sf040(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
{
if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
msg_cerr("%s called with incorrect arguments\n",
__func__);
return -1;
}
return erase_28sf040(flash);
}
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