mirror of
https://review.coreboot.org/flashrom.git
synced 2025-04-26 22:52:34 +02:00
f20b7beff0
Corresponding to flashrom svn r1789. Inspired by and mostly based on a patch Signed-off-by: Mark Marshall <mark.marshall@omicron.at> Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
|
|
* 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
|
|
|
|
int protect_28sf040(struct flashctx *flash)
|
|
{
|
|
chipaddr bios = flash->virtual_memory;
|
|
|
|
chip_readb(flash, bios + 0x1823);
|
|
chip_readb(flash, bios + 0x1820);
|
|
chip_readb(flash, bios + 0x1822);
|
|
chip_readb(flash, bios + 0x0418);
|
|
chip_readb(flash, bios + 0x041B);
|
|
chip_readb(flash, bios + 0x0419);
|
|
chip_readb(flash, bios + 0x040A);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int unprotect_28sf040(struct flashctx *flash)
|
|
{
|
|
chipaddr bios = flash->virtual_memory;
|
|
|
|
chip_readb(flash, bios + 0x1823);
|
|
chip_readb(flash, bios + 0x1820);
|
|
chip_readb(flash, bios + 0x1822);
|
|
chip_readb(flash, bios + 0x0418);
|
|
chip_readb(flash, bios + 0x041B);
|
|
chip_readb(flash, bios + 0x0419);
|
|
chip_readb(flash, bios + 0x041A);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int erase_sector_28sf040(struct flashctx *flash, unsigned int address,
|
|
unsigned int sector_size)
|
|
{
|
|
chipaddr bios = flash->virtual_memory;
|
|
|
|
/* This command sequence is very similar to erase_block_82802ab. */
|
|
chip_writeb(flash, AUTO_PG_ERASE1, bios);
|
|
chip_writeb(flash, AUTO_PG_ERASE2, bios + address);
|
|
|
|
/* wait for Toggle bit ready */
|
|
toggle_ready_jedec(flash, bios);
|
|
|
|
/* FIXME: Check the status register for errors. */
|
|
return 0;
|
|
}
|
|
|
|
/* chunksize is 1 */
|
|
int write_28sf040(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int len)
|
|
{
|
|
int i;
|
|
chipaddr bios = flash->virtual_memory;
|
|
chipaddr dst = flash->virtual_memory + start;
|
|
|
|
for (i = 0; i < len; 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(flash, AUTO_PGRM, dst);
|
|
chip_writeb(flash, *src++, dst++);
|
|
|
|
/* wait for Toggle bit ready */
|
|
toggle_ready_jedec(flash, bios);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int erase_28sf040(struct flashctx *flash)
|
|
{
|
|
chipaddr bios = flash->virtual_memory;
|
|
|
|
chip_writeb(flash, CHIP_ERASE, bios);
|
|
chip_writeb(flash, CHIP_ERASE, bios);
|
|
|
|
programmer_delay(10);
|
|
toggle_ready_jedec(flash, bios);
|
|
|
|
/* FIXME: Check the status register for errors. */
|
|
return 0;
|
|
}
|
|
|
|
int erase_chip_28sf040(struct flashctx *flash, unsigned int addr,
|
|
unsigned int blocklen)
|
|
{
|
|
if ((addr != 0) || (blocklen != flash->chip->total_size * 1024)) {
|
|
msg_cerr("%s called with incorrect arguments\n",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
return erase_28sf040(flash);
|
|
}
|