mtd: docg3: add OOB buffer to device structure

Add OOB buffer area to store the OOB data until the actual
page is written, so that it can be completed by hardware ECC
generator.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reviewed-by: Ivan Djelic <ivan.djelic@parrot.com>
Reviewed-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/devices/docg3.h b/drivers/mtd/devices/docg3.h
index e9967aba80a8a6b93378b09c66e9f4f24eb7145e..397e4616796eb8c4bf2e75f4bf4decccb776ae99 100644 (file)
--- a/drivers/mtd/devices/docg3.h
+++ b/drivers/mtd/devices/docg3.h
@@ -243,6 +243,11 @@
  * @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
  * @if_cfg: if true, reads are on 16bits, else reads are on 8bits
  * @bbt: bad block table cache
+ * @oob_write_ofs: offset of the MTD where this OOB should belong (ie. in next
+ *                 page_write)
+ * @oob_autoecc: if 1, use only bytes 0-7, 15, and fill the others with HW ECC
+ *               if 0, use all the 16 bytes.
+ * @oob_write_buf: prepared OOB for next page_write
  * @debugfs_root: debugfs root node
  */
 struct docg3 {
@@ -252,6 +257,9 @@ struct docg3 {
        unsigned int if_cfg:1;
        int max_block;
        u8 *bbt;
+       loff_t oob_write_ofs;
+       int oob_autoecc;
+       u8 oob_write_buf[DOC_LAYOUT_OOB_SIZE];
        struct dentry *debugfs_root;
 };