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stm50.c
48 строк
2 KB
Anastasia Klimchuk
core: Use SPDX in headers
12 ноя 2025, 14:30
12 ноя 2025, 14:30
c09a2f5
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/* * This file is part of the flashrom project. * * SPDX-License-Identifier: GPL-2.0-or-later * SPDX-FileCopyrightText: 2008 Claus Gindhart <claus.gindhart@kontron.com> * SPDX-FileCopyrightText: 2009 Sean Nelson <audiohacked@gmail.com> * SPDX-FileCopyrightText: 2013 Stefan Tauner */ /* * 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 "parallel.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(flash, 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); }