From 19f4f86bfed21c5326ed2acebe1163f3a83e832b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 04:25:50 +0200 Subject: Adding upstream version 241. Signed-off-by: Daniel Baumann --- src/udev/mtd_probe/probe_smartmedia.c | 97 +++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 src/udev/mtd_probe/probe_smartmedia.c (limited to 'src/udev/mtd_probe/probe_smartmedia.c') diff --git a/src/udev/mtd_probe/probe_smartmedia.c b/src/udev/mtd_probe/probe_smartmedia.c new file mode 100644 index 0000000..f8e1b14 --- /dev/null +++ b/src/udev/mtd_probe/probe_smartmedia.c @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright © 2010 - Maxim Levitsky + * + * mtd_probe 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. + * + * mtd_probe 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 mtd_probe; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "alloc-util.h" +#include "mtd_probe.h" + +static const uint8_t cis_signature[] = { + 0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20 +}; + +int probe_smart_media(int mtd_fd, mtd_info_t* info) { + int sector_size; + int block_size; + int size_in_megs; + int spare_count; + _cleanup_free_ uint8_t *cis_buffer = NULL; + int offset; + int cis_found = 0; + + cis_buffer = malloc(SM_SECTOR_SIZE); + if (!cis_buffer) + return log_oom(); + + if (info->type != MTD_NANDFLASH) + return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), + "Not marked MTD_NANDFLASH."); + + sector_size = info->writesize; + block_size = info->erasesize; + size_in_megs = info->size / (1024 * 1024); + + if (!IN_SET(sector_size, SM_SECTOR_SIZE, SM_SMALL_PAGE)) + return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), + "Unexpected sector size: %i", sector_size); + + switch(size_in_megs) { + case 1: + case 2: + spare_count = 6; + break; + case 4: + spare_count = 12; + break; + default: + spare_count = 24; + break; + } + + for (offset = 0; offset < block_size * spare_count; offset += sector_size) { + (void) lseek(mtd_fd, SEEK_SET, offset); + + if (read(mtd_fd, cis_buffer, SM_SECTOR_SIZE) == SM_SECTOR_SIZE) { + cis_found = 1; + break; + } + } + + if (!cis_found) + return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), + "CIS not found"); + + if (memcmp(cis_buffer, cis_signature, sizeof(cis_signature)) != 0 && + memcmp(cis_buffer + SM_SMALL_PAGE, cis_signature, sizeof(cis_signature)) != 0) + return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), + "CIS signature didn't match"); + + printf("MTD_FTL=smartmedia\n"); + return 0; +} -- cgit v1.2.3