Hi,
This is the patch implementing the detection in clean way.
Note that I call it smartmedia because xD is direct succesor of
smartmedia and other that different card package is equivalent to it.
---
commit 2599cabd36770785a13bf884049d649d385fd80c
Author: Maxim Levitsky <maximlevitsky@xxxxxxxxx>
Date: Fri Jun 18 02:08:48 2010 +0300
Add autodetection for xD/smartmedia cards
This can easily be extended for other types of FTL
Signed-off-by: Maxim Levitsky <maximlevitsky@xxxxxxxxx>
diff --git a/Makefile.am b/Makefile.am
index bafe4c7..5e9234a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -467,6 +467,21 @@ dist_udevrules_DATA += \
libexec_PROGRAMS += extras/mobile-action-modeswitch/mobile-action-modeswitch
# ------------------------------------------------------------------------------
+# mtd_probe - autoloads FTL module for mtd devices
+# ------------------------------------------------------------------------------
+extras_mtd_probe_mtd_probe_SOURCES = \
+ extras/mtd_probe/mtd_probe.c \
+ extras/mtd_probe/mtd_probe.h \
+ extras/mtd_probe/probe_smartmedia.c
+
+extras_mtd_probe_mtd_probe_CPPFLAGS = $(AM_CPPFLAGS)
+
+dist_udevrules_DATA += extras/mtd_probe/75-probe_mtd.rules
+
+libexec_PROGRAMS += extras/mtd_probe/mtd_probe
+
+
+# ------------------------------------------------------------------------------
# keymap - map custom hardware's multimedia keys
# ------------------------------------------------------------------------------
extras_keymap_keymap_SOURCES = extras/keymap/keymap.c
diff --git a/extras/mtd_probe/75-probe_mtd.rules b/extras/mtd_probe/75-probe_mtd.rules
new file mode 100644
index 0000000..1d1b398
--- /dev/null
+++ b/extras/mtd_probe/75-probe_mtd.rules
@@ -0,0 +1,10 @@
+#probe mtd devices for FTL
+
+ACTION!="add", GOTO="mtd_probe_end"
+
+KERNEL=="mtd*ro", IMPORT{program}="mtd_probe $tempnode"
+KERNEL=="mtd*ro", ENV{MTD_FTL}=="smartmedia", RUN+="/sbin/modprobe sm_ftl"
+
+
+LABEL="mtd_probe_end"
+
diff --git a/extras/mtd_probe/mtd_probe.c b/extras/mtd_probe/mtd_probe.c
new file mode 100644
index 0000000..d335b06
--- /dev/null
+++ b/extras/mtd_probe/mtd_probe.c
@@ -0,0 +1,54 @@
+/*
+ * mtd_probe.c
+ * This file is part of mtd_probe
+ *
+ * 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_probe.h"
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <mtd/mtd-user.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int main(int argc, char** argv) {
+
+ if (argc != 2) {
+ printf("usage: mtd_probe /dev/mtd[n]\n");
+ return 1;
+ }
+
+ int mtd_fd = open(argv[1], O_RDONLY);
+ if (mtd_fd == -1) {
+ perror("open");
+ exit(-1);
+ }
+
+ mtd_info_t mtd_info;
+ int 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/extras/mtd_probe/mtd_probe.h b/extras/mtd_probe/mtd_probe.h
new file mode 100644
index 0000000..845a7a1
--- /dev/null
+++ b/extras/mtd_probe/mtd_probe.h
@@ -0,0 +1,51 @@
+/*
+ * mtd_probe.h
+ * This file is part of mtd_probe
+ *
+ * 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>
+
+/* 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];
+} __attribute__((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/extras/mtd_probe/probe_smartmedia.c b/extras/mtd_probe/probe_smartmedia.c
new file mode 100644
index 0000000..ab6edea
--- /dev/null
+++ b/extras/mtd_probe/probe_smartmedia.c
@@ -0,0 +1,99 @@
+/*
+ * probe_smartmedia.c
+ * This file is part of mtd_probe
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <mtd/mtd-user.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdlib.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) {
+
+ char* cis_buffer = malloc(SM_SECTOR_SIZE);
+ if (!cis_buffer)
+ return;
+
+ if (info->type != MTD_NANDFLASH)
+ goto exit;
+
+ int sector_size = info->writesize;
+ int block_size = info->erasesize;
+ int size_in_megs = info->size / (1024 * 1024);
+ int spare_count;
+
+
+ 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;
+ }
+
+
+ int offset;
+ int cis_found = 0;
+
+ 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;
+}
--
To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
