2 * This file is part of the flashrom project.
4 * Copyright (C) 2000 Silicon Integrated System Corporation
5 * Copyright (C) 2009 Kontron Modular Computers
6 * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 /* Adapted from the Intel FW hub stuff for 82802ax parts. */
27 static int check_sst_fwhub_block_lock(struct flashctx *flash, int offset)
29 chipaddr registers = flash->virtual_registers;
32 blockstatus = chip_readb(flash, registers + offset + 2);
33 msg_cdbg("Lock status for 0x%06x (size 0x%06x) is %02x, ",
34 offset, flash->page_size, blockstatus);
35 switch (blockstatus & 0x3) {
37 msg_cdbg("full access\n");
40 msg_cdbg("write locked\n");
43 msg_cdbg("locked open\n");
46 msg_cdbg("write locked down\n");
49 /* Return content of the write_locked bit */
50 return blockstatus & 0x1;
53 static int clear_sst_fwhub_block_lock(struct flashctx *flash, int offset)
55 chipaddr registers = flash->virtual_registers;
58 blockstatus = check_sst_fwhub_block_lock(flash, offset);
61 msg_cdbg("Trying to clear lock for 0x%06x... ", offset);
62 chip_writeb(flash, 0, registers + offset + 2);
64 blockstatus = check_sst_fwhub_block_lock(flash, offset);
65 msg_cdbg("%s\n", (blockstatus) ? "failed" : "OK");
71 int printlock_sst_fwhub(struct flashctx *flash)
75 for (i = 0; i < flash->total_size * 1024; i += flash->page_size)
76 check_sst_fwhub_block_lock(flash, i);
81 int unlock_sst_fwhub(struct flashctx *flash)
85 for (i = 0; i < flash->total_size * 1024; i += flash->page_size)
87 if (clear_sst_fwhub_block_lock(flash, i))
89 msg_cdbg("Warning: Unlock Failed for block 0x%06x\n", i);