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-rw-r--r--src/udev/mtd_probe/mtd_probe.c59
-rw-r--r--src/udev/mtd_probe/mtd_probe.h52
-rw-r--r--src/udev/mtd_probe/probe_smartmedia.c97
3 files changed, 208 insertions, 0 deletions
diff --git a/src/udev/mtd_probe/mtd_probe.c b/src/udev/mtd_probe/mtd_probe.c
new file mode 100644
index 0000000..df1f1c1
--- /dev/null
+++ b/src/udev/mtd_probe/mtd_probe.c
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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 <errno.h>
+#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 "alloc-util.h"
+#include "fd-util.h"
+#include "mtd_probe.h"
+
+int main(int argc, char** argv) {
+ _cleanup_close_ int mtd_fd = -1;
+ mtd_info_t mtd_info;
+
+ if (argc != 2) {
+ printf("usage: mtd_probe /dev/mtd[n]\n");
+ return EXIT_FAILURE;
+ }
+
+ mtd_fd = open(argv[1], O_RDONLY|O_CLOEXEC);
+ if (mtd_fd < 0) {
+ log_error_errno(errno, "Failed to open: %m");
+ return EXIT_FAILURE;
+ }
+
+ if (ioctl(mtd_fd, MEMGETINFO, &mtd_info) < 0) {
+ log_error_errno(errno, "Failed to issue MEMGETINFO ioctl: %m");
+ return EXIT_FAILURE;
+ }
+
+ if (probe_smart_media(mtd_fd, &mtd_info) < 0)
+ return EXIT_FAILURE;
+
+ return EXIT_SUCCESS;
+}
diff --git a/src/udev/mtd_probe/mtd_probe.h b/src/udev/mtd_probe/mtd_probe.h
new file mode 100644
index 0000000..ae03a7d
--- /dev/null
+++ b/src/udev/mtd_probe/mtd_probe.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#pragma once
+
+/*
+ * 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 <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
+
+int probe_smart_media(int mtd_fd, mtd_info_t *info);
diff --git a/src/udev/mtd_probe/probe_smartmedia.c b/src/udev/mtd_probe/probe_smartmedia.c
new file mode 100644
index 0000000..f4612ba
--- /dev/null
+++ b/src/udev/mtd_probe/probe_smartmedia.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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 <errno.h>
+#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 "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;
+}
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