diff options
Diffstat (limited to 'src/grp-udev/mtd_probe')
| -rw-r--r-- | src/grp-udev/mtd_probe/Makefile | 37 | ||||
| -rw-r--r-- | src/grp-udev/mtd_probe/mtd_probe.c | 56 | ||||
| -rw-r--r-- | src/grp-udev/mtd_probe/mtd_probe.h | 51 | ||||
| -rw-r--r-- | src/grp-udev/mtd_probe/probe_smartmedia.c | 96 |
4 files changed, 240 insertions, 0 deletions
diff --git a/src/grp-udev/mtd_probe/Makefile b/src/grp-udev/mtd_probe/Makefile new file mode 100644 index 0000000000..d7392a8a3b --- /dev/null +++ b/src/grp-udev/mtd_probe/Makefile @@ -0,0 +1,37 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# systemd 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 +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with systemd; If not, see <http://www.gnu.org/licenses/>. +include $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +mtd_probe_SOURCES = \ + src/udev/mtd_probe/mtd_probe.c \ + src/udev/mtd_probe/mtd_probe.h \ + src/udev/mtd_probe/probe_smartmedia.c + +dist_udevrules_DATA += \ + rules/75-probe_mtd.rules + +udevlibexec_PROGRAMS += \ + mtd_probe + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-udev/mtd_probe/mtd_probe.c b/src/grp-udev/mtd_probe/mtd_probe.c new file mode 100644 index 0000000000..462fab7623 --- /dev/null +++ b/src/grp-udev/mtd_probe/mtd_probe.c @@ -0,0 +1,56 @@ +/* + * Copyright (C) 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 <fcntl.h> +#include <mtd/mtd-user.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "mtd_probe.h" + +int main(int argc, char** argv) +{ + int mtd_fd; + int error; + mtd_info_t mtd_info; + + if (argc != 2) { + printf("usage: mtd_probe /dev/mtd[n]\n"); + return 1; + } + + mtd_fd = open(argv[1], O_RDONLY|O_CLOEXEC); + if (mtd_fd == -1) { + perror("open"); + exit(-1); + } + + error = ioctl(mtd_fd, MEMGETINFO, &mtd_info); + if (error == -1) { + perror("ioctl"); + exit(-1); + } + + probe_smart_media(mtd_fd, &mtd_info); + return -1; +} diff --git a/src/grp-udev/mtd_probe/mtd_probe.h b/src/grp-udev/mtd_probe/mtd_probe.h new file mode 100644 index 0000000000..68e4954537 --- /dev/null +++ b/src/grp-udev/mtd_probe/mtd_probe.h @@ -0,0 +1,51 @@ +#pragma once + +/* + * Copyright (C) 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 <mtd/mtd-user.h> + +#include "macro.h" + +/* Full oob structure as written on the flash */ +struct sm_oob { + uint32_t reserved; + uint8_t data_status; + uint8_t block_status; + uint8_t lba_copy1[2]; + uint8_t ecc2[3]; + uint8_t lba_copy2[2]; + uint8_t ecc1[3]; +} _packed_; + +/* one sector is always 512 bytes, but it can consist of two nand pages */ +#define SM_SECTOR_SIZE 512 + +/* oob area is also 16 bytes, but might be from two pages */ +#define SM_OOB_SIZE 16 + +/* This is maximum zone size, and all devices that have more that one zone + have this size */ +#define SM_MAX_ZONE_SIZE 1024 + +/* support for small page nand */ +#define SM_SMALL_PAGE 256 +#define SM_SMALL_OOB_SIZE 8 + +void probe_smart_media(int mtd_fd, mtd_info_t *info); diff --git a/src/grp-udev/mtd_probe/probe_smartmedia.c b/src/grp-udev/mtd_probe/probe_smartmedia.c new file mode 100644 index 0000000000..2a7ba17637 --- /dev/null +++ b/src/grp-udev/mtd_probe/probe_smartmedia.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 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 <fcntl.h> +#include <mtd/mtd-user.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "mtd_probe.h" + +static const uint8_t cis_signature[] = { + 0x01, 0x03, 0xD9, 0x01, 0xFF, 0x18, 0x02, 0xDF, 0x01, 0x20 +}; + + +void probe_smart_media(int mtd_fd, mtd_info_t* info) +{ + int sector_size; + int block_size; + int size_in_megs; + int spare_count; + char* cis_buffer = malloc(SM_SECTOR_SIZE); + int offset; + int cis_found = 0; + + if (!cis_buffer) + return; + + if (info->type != MTD_NANDFLASH) + goto exit; + + sector_size = info->writesize; + block_size = info->erasesize; + size_in_megs = info->size / (1024 * 1024); + + if (sector_size != SM_SECTOR_SIZE && sector_size != SM_SMALL_PAGE) + goto exit; + + 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) { + 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) + goto exit; + + if (memcmp(cis_buffer, cis_signature, sizeof(cis_signature)) != 0 && + (memcmp(cis_buffer + SM_SMALL_PAGE, cis_signature, + sizeof(cis_signature)) != 0)) + goto exit; + + printf("MTD_FTL=smartmedia\n"); + free(cis_buffer); + exit(0); +exit: + free(cis_buffer); + return; +} |