| /* | |
| * This file is part of the flashrom project. | |
| * | |
| * Copyright (C) 2008 Claus Gindhart <claus.gindhart@kontron.com> | |
| * 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 | |
| */ | |
| /* | |
| * This module is designed for supporting the devices | |
| * ST M50FLW040A (not yet tested) | |
| * ST M50FLW040B (not yet tested) | |
| * ST M50FLW080A | |
| * ST M50FLW080B (not yet tested) | |
| */ | |
| #include "flash.h" | |
| #include "flashchips.h" | |
| #include "chipdrivers.h" | |
| /* | |
| * claus.gindhart@kontron.com | |
| * The ST M50FLW080B and STM50FLW080B chips have to be unlocked, | |
| * before you can erase them or write to them. | |
| */ | |
| static int unlock_block_stm50flw0x0x(struct flashctx *flash, int offset) | |
| { | |
| chipaddr wrprotect = flash->virtual_registers + 2; | |
| static const uint8_t unlock_sector = 0x00; | |
| int j; | |
| /* | |
| * These chips have to be unlocked before you can erase them or write | |
| * to them. The size of the locking sectors depends on the type | |
| * of chip. | |
| * | |
| * Sometimes, the BIOS does this for you; so you probably | |
| * don't need to worry about that. | |
| */ | |
| /* Check, if it's is a top/bottom-block with 4k-sectors. */ | |
| /* TODO: What about the other types? */ | |
| if ((offset == 0) || | |
| (offset == (flash->model_id == ST_M50FLW080A ? 0xE0000 : 0x10000)) | |
| || (offset == 0xF0000)) { | |
| // unlock each 4k-sector | |
| for (j = 0; j < 0x10000; j += 0x1000) { | |
| msg_cdbg("unlocking at 0x%x\n", offset + j); | |
| chip_writeb(flash, unlock_sector, wrprotect + offset + j); | |
| if (chip_readb(flash, wrprotect + offset + j) != unlock_sector) { | |
| msg_cerr("Cannot unlock sector @ 0x%x\n", | |
| offset + j); | |
| return -1; | |
| } | |
| } | |
| } else { | |
| msg_cdbg("unlocking at 0x%x\n", offset); | |
| chip_writeb(flash, unlock_sector, wrprotect + offset); | |
| if (chip_readb(flash, wrprotect + offset) != unlock_sector) { | |
| msg_cerr("Cannot unlock sector @ 0x%x\n", offset); | |
| return -1; | |
| } | |
| } | |
| return 0; | |
| } | |
| int unlock_stm50flw0x0x(struct flashctx *flash) | |
| { | |
| int i; | |
| for (i = 0; i < flash->total_size * 1024; i+= flash->page_size) { | |
| if(unlock_block_stm50flw0x0x(flash, i)) { | |
| msg_cerr("UNLOCK FAILED!\n"); | |
| return -1; | |
| } | |
| } | |
| return 0; | |
| } | |
| /* This function is unused. */ | |
| int erase_sector_stm50flw0x0x(struct flashctx *flash, unsigned int sector, unsigned int sectorsize) | |
| { | |
| chipaddr bios = flash->virtual_memory + sector; | |
| // clear status register | |
| chip_writeb(flash, 0x50, bios); | |
| // now start it | |
| chip_writeb(flash, 0x32, bios); | |
| chip_writeb(flash, 0xd0, bios); | |
| programmer_delay(10); | |
| wait_82802ab(flash); | |
| /* FIXME: Check the status register for errors. */ | |
| return 0; | |
| } |