| /* |
| * 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> |
| * Copyright (C) 2013 Stefan Tauner |
| * |
| * 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 |
| */ |
| |
| /* |
| * All ST M50 chips are locked on startup. Most of them have a uniform 64 kB block layout, but some have |
| * a non-uniform block/sector segmentation which has to be handled with more care. Some of the non-uniform |
| * chips support erasing of the 4 kB sectors with another command. |
| */ |
| |
| #include "flash.h" |
| #include "chipdrivers.h" |
| |
| static int stm50_erase_sector(struct flashctx *flash, unsigned int addr) |
| { |
| chipaddr bios = flash->virtual_memory + addr; |
| |
| // clear status register |
| chip_writeb(flash, 0x50, bios); |
| // now start it |
| chip_writeb(flash, 0x32, bios); |
| chip_writeb(flash, 0xd0, bios); |
| programmer_delay(10); |
| |
| uint8_t status = wait_82802ab(flash); |
| print_status_82802ab(status); |
| |
| return status == 0x80; |
| } |
| |
| /* Some ST M50* chips do support erasing of sectors. This function will derive the erase function to use from |
| * the length of the of the block. For calls that apparently do not address a sector (but a block) we just call |
| * the block erase function instead. FIXME: This duplicates the behavior of the remaining erasers for blocks and |
| * might be fixed when flashrom supports multiple functions per eraser or erasers that do erase parts of the |
| * chip only. */ |
| int erase_sector_stm50(struct flashctx *flash, unsigned int addr, unsigned int len) |
| { |
| if (len == 4096) |
| return stm50_erase_sector(flash, addr); |
| else |
| return erase_block_82802ab(flash, addr, len); |
| } |