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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2009 Kontron Modular Computers
* 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.
*/
/* Adapted from the Intel FW hub stuff for 82802ax parts. */
#include "flash.h"
#include "chipdrivers.h"
static int check_sst_fwhub_block_lock(struct flashctx *flash, unsigned int offset)
{
chipaddr registers = flash->virtual_registers;
uint8_t blockstatus;
blockstatus = chip_readb(flash, registers + offset + 2);
msg_cdbg("Lock status for 0x%06x (size 0x%06x) is %02x, ",
offset, flash->chip->page_size, blockstatus);
switch (blockstatus & 0x3) {
case 0x0:
msg_cdbg("full access\n");
break;
case 0x1:
msg_cdbg("write locked\n");
break;
case 0x2:
msg_cdbg("locked open\n");
break;
case 0x3:
msg_cdbg("write locked down\n");
break;
}
/* Return content of the write_locked bit */
return blockstatus & 0x1;
}
static int clear_sst_fwhub_block_lock(struct flashctx *flash, unsigned int offset)
{
chipaddr registers = flash->virtual_registers;
uint8_t blockstatus;
blockstatus = check_sst_fwhub_block_lock(flash, offset);
if (blockstatus) {
msg_cdbg("Trying to clear lock for 0x%06x... ", offset);
chip_writeb(flash, 0, registers + offset + 2);
blockstatus = check_sst_fwhub_block_lock(flash, offset);
msg_cdbg("%s\n", (blockstatus) ? "failed" : "OK");
}
return blockstatus;
}
int printlock_sst_fwhub(struct flashctx *flash)
{
unsigned int i;
for (i = 0; i < flash->chip->total_size * 1024; i += flash->chip->page_size)
check_sst_fwhub_block_lock(flash, i);
return 0;
}
int unlock_sst_fwhub(struct flashctx *flash)
{
unsigned int i;
int ret = 0;
for (i = 0; i < flash->chip->total_size * 1024; i += flash->chip->page_size)
{
if (clear_sst_fwhub_block_lock(flash, i))
{
msg_cwarn("Warning: Unlock Failed for block 0x%06x\n", i);
ret++;
}
}
return ret;
}
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