From 4f8894887d1e3569817a0f1972616bee83c43982 Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Sun, 19 Aug 2007 21:53:44 +0000
Subject: [PATCH] add 'mtd refresh' command

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8439 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/mtd/src/mtd.c | 33 ++++++++++++++++++++++++++++++++-
 package/mtd/src/mtd.h |  1 +
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c
index 9025240e1..85b069f81 100644
--- a/package/mtd/src/mtd.c
+++ b/package/mtd/src/mtd.c
@@ -241,6 +241,25 @@ mtd_erase(const char *mtd)
 
 }
 
+int
+mtd_refresh(const char *mtd)
+{
+	int fd;
+
+	fd = mtd_open(mtd, O_RDWR | O_SYNC);
+	if(fd < 0) {
+		fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+		exit(1);
+	}
+	if (ioctl(fd, MTDREFRESH, NULL)) {
+		fprintf(stderr, "Failed to refresh the MTD device\n");
+		close(fd);
+		exit(1);
+	}
+	close(fd);
+	return 0;
+}
+
 int
 mtd_write(int imagefd, const char *mtd)
 {
@@ -318,6 +337,7 @@ void usage(void)
 	"The device is in the format of mtdX (eg: mtd4) or its label.\n"
 	"mtd recognizes these commands:\n"
 	"        unlock                  unlock the device\n"
+	"        refresh                 refresh mtd partition\n"
 	"        erase                   erase all data on device\n"
 	"        write <imagefile>|-     write <imagefile> (use - for stdin) to device\n"
 	"Following options are available:\n"
@@ -338,7 +358,8 @@ int main (int argc, char **argv)
 	enum {
 		CMD_ERASE,
 		CMD_WRITE,
-		CMD_UNLOCK
+		CMD_UNLOCK,
+		CMD_REFRESH
 	} cmd;
 	
 	erase[0] = NULL;
@@ -380,6 +401,9 @@ int main (int argc, char **argv)
 	if ((strcmp(argv[0], "unlock") == 0) && (argc == 2)) {
 		cmd = CMD_UNLOCK;
 		device = argv[1];
+	} else if ((strcmp(argv[0], "refresh") == 0) && (argc == 2)) {
+		cmd = CMD_REFRESH;
+		device = argv[1];
 	} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2)) {
 		cmd = CMD_ERASE;
 		device = argv[1];
@@ -451,6 +475,13 @@ int main (int argc, char **argv)
 			if (quiet < 2)
 				fprintf(stderr, "\n");
 			break;
+		case CMD_REFRESH:
+			if (quiet < 2)
+				fprintf(stderr, "Refreshing mtd partition %s ... ");
+			mtd_refresh(device);
+			if (quiet < 2)
+				fprintf(stderr, "\n");
+			break;
 	}
 
 	sync();
diff --git a/package/mtd/src/mtd.h b/package/mtd/src/mtd.h
index 8b83afd57..6ce62611e 100644
--- a/package/mtd/src/mtd.h
+++ b/package/mtd/src/mtd.h
@@ -96,6 +96,7 @@ struct region_info_user {
 #define MEMGETREGIONINFO	_IOWR('M', 8, struct region_info_user)
 #define	MEMREADDATA             _IOWR('M', 9, struct mtd_oob_buf)
 #define	MEMWRITEDATA            _IOWR('M', 10, struct mtd_oob_buf)
+#define MTDREFRESH				_IO('M', 23)
 
 #ifndef __KERNEL__