| 1 | /*␊ |
| 2 | * This file is part of the flashrom project.␊ |
| 3 | *␊ |
| 4 | * Copyright (C) 2000 Silicon Integrated System Corporation␊ |
| 5 | * Copyright (C) 2009 Kontron Modular Computers␊ |
| 6 | * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>␊ |
| 7 | *␊ |
| 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.␊ |
| 12 | *␊ |
| 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.␊ |
| 17 | *␊ |
| 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␊ |
| 21 | */␊ |
| 22 | ␊ |
| 23 | /* Adapted from the Intel FW hub stuff for 82802ax parts. */␊ |
| 24 | ␊ |
| 25 | #include "flash.h"␊ |
| 26 | ␊ |
| 27 | static int check_sst_fwhub_block_lock(struct flashctx *flash, int offset)␊ |
| 28 | {␊ |
| 29 | ␉chipaddr registers = flash->virtual_registers;␊ |
| 30 | ␉uint8_t blockstatus;␊ |
| 31 | ␊ |
| 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) {␊ |
| 36 | ␉case 0x0:␊ |
| 37 | ␉␉msg_cdbg("full access\n");␊ |
| 38 | ␉␉break;␊ |
| 39 | ␉case 0x1:␊ |
| 40 | ␉␉msg_cdbg("write locked\n");␊ |
| 41 | ␉␉break;␊ |
| 42 | ␉case 0x2:␊ |
| 43 | ␉␉msg_cdbg("locked open\n");␊ |
| 44 | ␉␉break;␊ |
| 45 | ␉case 0x3:␊ |
| 46 | ␉␉msg_cdbg("write locked down\n");␊ |
| 47 | ␉␉break;␊ |
| 48 | ␉}␊ |
| 49 | ␉/* Return content of the write_locked bit */␊ |
| 50 | ␉return blockstatus & 0x1;␊ |
| 51 | }␊ |
| 52 | ␊ |
| 53 | static int clear_sst_fwhub_block_lock(struct flashctx *flash, int offset)␊ |
| 54 | {␊ |
| 55 | ␉chipaddr registers = flash->virtual_registers;␊ |
| 56 | ␉uint8_t blockstatus;␊ |
| 57 | ␊ |
| 58 | ␉blockstatus = check_sst_fwhub_block_lock(flash, offset);␊ |
| 59 | ␊ |
| 60 | ␉if (blockstatus) {␊ |
| 61 | ␉␉msg_cdbg("Trying to clear lock for 0x%06x... ", offset);␊ |
| 62 | ␉␉chip_writeb(flash, 0, registers + offset + 2);␊ |
| 63 | ␊ |
| 64 | ␉␉blockstatus = check_sst_fwhub_block_lock(flash, offset);␊ |
| 65 | ␉␉msg_cdbg("%s\n", (blockstatus) ? "failed" : "OK");␊ |
| 66 | ␉}␊ |
| 67 | ␊ |
| 68 | ␉return blockstatus;␊ |
| 69 | }␊ |
| 70 | ␊ |
| 71 | int printlock_sst_fwhub(struct flashctx *flash)␊ |
| 72 | {␊ |
| 73 | ␉int i;␊ |
| 74 | ␊ |
| 75 | ␉for (i = 0; i < flash->total_size * 1024; i += flash->page_size)␊ |
| 76 | ␉␉check_sst_fwhub_block_lock(flash, i);␊ |
| 77 | ␊ |
| 78 | ␉return 0;␊ |
| 79 | }␊ |
| 80 | ␊ |
| 81 | int unlock_sst_fwhub(struct flashctx *flash)␊ |
| 82 | {␊ |
| 83 | ␉int i, ret=0;␊ |
| 84 | ␊ |
| 85 | ␉for (i = 0; i < flash->total_size * 1024; i += flash->page_size)␊ |
| 86 | ␉{␊ |
| 87 | ␉␉if (clear_sst_fwhub_block_lock(flash, i))␊ |
| 88 | ␉␉{␊ |
| 89 | ␉␉␉msg_cdbg("Warning: Unlock Failed for block 0x%06x\n", i);␊ |
| 90 | ␉␉␉ret++;␊ |
| 91 | ␉␉}␊ |
| 92 | ␉}␊ |
| 93 | ␉return ret;␊ |
| 94 | }␊ |
| 95 | ␊ |
| 96 | |
