diff options
| -rw-r--r-- | include/libmtd.h | 28 | ||||
| -rw-r--r-- | lib/libmtd.c | 27 |
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}; |