| 1 | /*␊ |
| 2 | * This file is part of the flashrom project.␊ |
| 3 | *␊ |
| 4 | * Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com>␊ |
| 5 | * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>␊ |
| 6 | *␊ |
| 7 | * This program is free software; you can redistribute it and/or modify␊ |
| 8 | * it under the terms of the GNU General Public License as published by␊ |
| 9 | * the Free Software Foundation; either version 2 of the License, or␊ |
| 10 | * (at your option) any later version.␊ |
| 11 | *␊ |
| 12 | * This program is distributed in the hope that it will be useful,␊ |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of␊ |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the␊ |
| 15 | * GNU General Public License for more details.␊ |
| 16 | *␊ |
| 17 | * You should have received a copy of the GNU General Public License␊ |
| 18 | * along with this program; if not, write to the Free Software␊ |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA␊ |
| 20 | */␊ |
| 21 | ␊ |
| 22 | /*␊ |
| 23 | * This module is designed for supporting the devices␊ |
| 24 | * ST M50FLW040A (not yet tested)␊ |
| 25 | * ST M50FLW040B (not yet tested)␊ |
| 26 | * ST M50FLW080A␊ |
| 27 | * ST M50FLW080B (not yet tested)␊ |
| 28 | */␊ |
| 29 | ␊ |
| 30 | #include "flash.h"␊ |
| 31 | #include "flashchips.h"␊ |
| 32 | #include "chipdrivers.h"␊ |
| 33 | ␊ |
| 34 | /*␊ |
| 35 | * claus.gindhart@kontron.com␊ |
| 36 | * The ST M50FLW080B and STM50FLW080B chips have to be unlocked,␊ |
| 37 | * before you can erase them or write to them.␊ |
| 38 | */␊ |
| 39 | static int unlock_block_stm50flw0x0x(struct flashctx *flash, int offset)␊ |
| 40 | {␊ |
| 41 | ␉chipaddr wrprotect = flash->virtual_registers + 2;␊ |
| 42 | ␉static const uint8_t unlock_sector = 0x00;␊ |
| 43 | ␉int j;␊ |
| 44 | ␊ |
| 45 | ␉/*␊ |
| 46 | ␉ * These chips have to be unlocked before you can erase them or write␊ |
| 47 | ␉ * to them. The size of the locking sectors depends on the type␊ |
| 48 | ␉ * of chip.␊ |
| 49 | ␉ *␊ |
| 50 | ␉ * Sometimes, the BIOS does this for you; so you probably␊ |
| 51 | ␉ * don't need to worry about that.␊ |
| 52 | ␉ */␊ |
| 53 | ␊ |
| 54 | ␉/* Check, if it's is a top/bottom-block with 4k-sectors. */␊ |
| 55 | ␉/* TODO: What about the other types? */␊ |
| 56 | ␉if ((offset == 0) ||␊ |
| 57 | ␉ (offset == (flash->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000))␊ |
| 58 | ␉ || (offset == 0xF0000)) {␊ |
| 59 | ␊ |
| 60 | ␉␉// unlock each 4k-sector␊ |
| 61 | ␉␉for (j = 0; j < 0x10000; j += 0x1000) {␊ |
| 62 | ␉␉␉msg_cdbg("unlocking at 0x%x\n", offset + j);␊ |
| 63 | ␉␉␉chip_writeb(flash, unlock_sector,␊ |
| 64 | ␉␉␉␉ wrprotect + offset + j);␊ |
| 65 | ␉␉␉if (chip_readb(flash, wrprotect + offset + j) !=␊ |
| 66 | ␉␉␉ unlock_sector) {␊ |
| 67 | ␉␉␉␉msg_cerr("Cannot unlock sector @ 0x%x\n",␊ |
| 68 | ␉␉␉␉ offset + j);␊ |
| 69 | ␉␉␉␉return -1;␊ |
| 70 | ␉␉␉}␊ |
| 71 | ␉␉}␊ |
| 72 | ␉} else {␊ |
| 73 | ␉␉msg_cdbg("unlocking at 0x%x\n", offset);␊ |
| 74 | ␉␉chip_writeb(flash, unlock_sector, wrprotect + offset);␊ |
| 75 | ␉␉if (chip_readb(flash, wrprotect + offset) != unlock_sector) {␊ |
| 76 | ␉␉␉msg_cerr("Cannot unlock sector @ 0x%x\n", offset);␊ |
| 77 | ␉␉␉return -1;␊ |
| 78 | ␉␉}␊ |
| 79 | ␉}␊ |
| 80 | ␊ |
| 81 | ␉return 0;␊ |
| 82 | }␊ |
| 83 | ␊ |
| 84 | int unlock_stm50flw0x0x(struct flashctx *flash)␊ |
| 85 | {␊ |
| 86 | ␉int i;␊ |
| 87 | ␊ |
| 88 | ␉for (i = 0; i < flash->total_size * 1024; i+= flash->page_size) {␊ |
| 89 | ␉␉if(unlock_block_stm50flw0x0x(flash, i)) {␊ |
| 90 | ␉␉␉msg_cerr("UNLOCK FAILED!\n");␊ |
| 91 | ␉␉␉return -1;␊ |
| 92 | ␉␉}␊ |
| 93 | ␉}␊ |
| 94 | ␊ |
| 95 | ␉return 0;␊ |
| 96 | }␊ |
| 97 | ␊ |
| 98 | /* This function is unused. */␊ |
| 99 | int erase_sector_stm50flw0x0x(struct flashctx *flash, unsigned int sector,␊ |
| 100 | ␉␉␉ unsigned int sectorsize)␊ |
| 101 | {␊ |
| 102 | ␉chipaddr bios = flash->virtual_memory + sector;␊ |
| 103 | ␊ |
| 104 | ␉// clear status register␊ |
| 105 | ␉chip_writeb(flash, 0x50, bios);␊ |
| 106 | ␉// now start it␊ |
| 107 | ␉chip_writeb(flash, 0x32, bios);␊ |
| 108 | ␉chip_writeb(flash, 0xd0, bios);␊ |
| 109 | ␉programmer_delay(10);␊ |
| 110 | ␊ |
| 111 | ␉wait_82802ab(flash);␊ |
| 112 | ␊ |
| 113 | ␉/* FIXME: Check the status register for errors. */␊ |
| 114 | ␉return 0;␊ |
| 115 | }␊ |
| 116 | |
