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authorMike Frysinger <vapier@gentoo.org>2011-06-07 11:28:02 -0400
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-06-08 14:58:14 +0300
commitd1bc539a3a77bd38f1776d5026277d66b1661c8a (patch)
tree85777927b32b48749f33e8c627475ffe9e4576b8
parent811e2e742e64cdc4bfb9519c0d0db53ac75aa4ce (diff)
libmtd: add helper funcs for getting regioninfo and locked info
This extends the libmtd with the helper functions: mtd_regioninfo: interface to MEMGETREGIONINFO mtd_islocked: interface to MEMISLOCKED Users of these functions will follow shortly ... Artem: do not print error message in mtd_islocked() Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
-rw-r--r--include/libmtd.h28
-rw-r--r--lib/libmtd.c27
2 files changed, 55 insertions, 0 deletions
diff --git a/include/libmtd.h b/include/libmtd.h
index e30c8a6..7275246 100644
--- a/include/libmtd.h
+++ b/include/libmtd.h
@@ -35,6 +35,9 @@ extern "C" {
/* MTD library descriptor */
typedef void * libmtd_t;
+/* Forward decls */
+struct region_info_user;
+
/**
* @mtd_dev_cnt: count of MTD devices in system
* @lowest_mtd_num: lowest MTD device number in system
@@ -174,6 +177,31 @@ int mtd_unlock(const struct mtd_dev_info *mtd, int fd, int eb);
int mtd_erase(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb);
/**
+ * mtd_regioninfo - get information about an erase region.
+ * @fd: MTD device node file descriptor
+ * @regidx: index of region to look up
+ * @reginfo: the region information is returned here
+ *
+ * This function gets information about an erase region defined by the
+ * @regidx index and saves this information in the @reginfo object.
+ * Returns %0 in case of success and %-1 in case of failure. If the
+ * @regidx is not valid or unavailable, errno is set to @ENODEV.
+ */
+int mtd_regioninfo(int fd, int regidx, struct region_info_user *reginfo);
+
+/**
+ * mtd_islocked - see if the specified eraseblock is locked.
+ * @mtd: MTD device description object
+ * @fd: MTD device node file descriptor
+ * @eb: eraseblock to check
+ *
+ * This function checks to see if eraseblock @eb of MTD device described
+ * by @fd is locked. Returns %0 if it is unlocked, %1 if it is locked, and
+ * %-1 in case of failure.
+ */
+int mtd_islocked(const struct mtd_dev_info *mtd, int fd, int eb);
+
+/**
* mtd_torture - torture an eraseblock.
* @desc: MTD library descriptor
* @mtd: MTD device description object
diff --git a/lib/libmtd.c b/lib/libmtd.c
index a651808..2573cc7 100644
--- a/lib/libmtd.c
+++ b/lib/libmtd.c
@@ -883,6 +883,33 @@ int mtd_erase(libmtd_t desc, const struct mtd_dev_info *mtd, int fd, int eb)
return 0;
}
+int mtd_regioninfo(int fd, int regidx, struct region_info_user *reginfo)
+{
+ int ret;
+
+ if (regidx < 0) {
+ errno = ENODEV;
+ return -1;
+ }
+
+ ret = ioctl(fd, MEMGETREGIONINFO, reginfo);
+ if (ret < 0)
+ return sys_errmsg("%s ioctl failed for erase region %d",
+ "MEMGETREGIONINFO", regidx);
+
+ return 0;
+}
+
+int mtd_islocked(const struct mtd_dev_info *mtd, int fd, int eb)
+{
+ erase_info_t ei;
+
+ ei.start = eb * mtd->eb_size;
+ ei.length = mtd->eb_size;
+
+ return ioctl(fd, MEMISLOCKED, &ei);
+}
+
/* Patterns to write to a physical eraseblock when torturing it */
static uint8_t patterns[] = {0xa5, 0x5a, 0x0};