FWU: Add FWU metadata access driver for MTD storage regions
In the FWU Multi Bank Update feature, the information about the
updatable images is stored as part of the metadata, on a separate
region. Add a driver for reading from and writing to the metadata
when the updatable images and the metadata are stored on a raw
MTD region.
The code is divided into core under drivers/fwu-mdata/ and some helper
functions clubbed together under lib/fwu_updates/
Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
diff --git a/include/fwu.h b/include/fwu.h
index 6affb73..ac5c5de 100644
--- a/include/fwu.h
+++ b/include/fwu.h
@@ -8,6 +8,8 @@
#include <blk.h>
#include <efi.h>
+#include <mtd.h>
+#include <uuid.h>
#include <linux/types.h>
@@ -18,6 +20,12 @@
struct udevice *blk_dev;
};
+struct fwu_mtd_image_info {
+ u32 start, size;
+ int bank_num, image_num;
+ char uuidbuf[UUID_STR_LEN + 1];
+};
+
struct fwu_mdata_ops {
/**
* read_mdata() - Populate the asked FWU metadata copy
@@ -251,4 +259,28 @@
*/
int fwu_trial_state_ctr_start(void);
+/**
+ * fwu_gen_alt_info_from_mtd() - Parse dfu_alt_info from metadata in mtd
+ * @buf: Buffer into which the dfu_alt_info is filled
+ * @len: Maximum characters that can be written in buf
+ * @mtd: Pointer to underlying MTD device
+ *
+ * Parse dfu_alt_info from metadata in mtd. Used for setting the env.
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int fwu_gen_alt_info_from_mtd(char *buf, size_t len, struct mtd_info *mtd);
+
+/**
+ * fwu_mtd_get_alt_num() - Mapping of fwu_plat_get_alt_num for MTD device
+ * @image_guid: Image GUID for which DFU alt number needs to be retrieved
+ * @alt_num: Pointer to the alt_num
+ * @mtd_dev: Name of mtd device instance
+ *
+ * To map fwu_plat_get_alt_num onto mtd based metadata implementation.
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int fwu_mtd_get_alt_num(efi_guid_t *image_guid, u8 *alt_num, const char *mtd_dev);
+
#endif /* _FWU_H_ */