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Diffstat (limited to 'include/linux/mtd/mtd.h')
-rw-r--r--include/linux/mtd/mtd.h50
1 files changed, 48 insertions, 2 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 4970c2e96fbf..e75bb584e80b 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -67,6 +67,50 @@ struct mtd_ecc_stats {
unsigned long failed;
};
+/*
+ * oob operation modes
+ *
+ * MTD_OOB_PLACE: oob data are placed at the given offset
+ * MTD_OOB_AUTO: oob data are automatically placed at the free areas
+ * which are defined by the ecclayout
+ * MTD_OOB_RAW: mode to read raw data+oob in one chunk. The oob data
+ * is inserted into the data. Thats a raw image of the
+ * flash contents.
+ */
+typedef enum {
+ MTD_OOB_PLACE,
+ MTD_OOB_AUTO,
+ MTD_OOB_RAW,
+} mtd_oob_mode_t;
+
+/**
+ * struct mtd_oob_ops - oob operation operands
+ * @mode: operation mode
+ *
+ * @len: number of bytes to write/read. When a data buffer is given
+ * (datbuf != NULL) this is the number of data bytes. When
+ + no data buffer is available this is the number of oob bytes.
+ *
+ * @retlen: number of bytes written/read. When a data buffer is given
+ * (datbuf != NULL) this is the number of data bytes. When
+ + no data buffer is available this is the number of oob bytes.
+ *
+ * @ooblen: number of oob bytes per page
+ * @ooboffs: offset of oob data in the oob area (only relevant when
+ * mode = MTD_OOB_PLACE)
+ * @datbuf: data buffer - if NULL only oob data are read/written
+ * @oobbuf: oob data buffer
+ */
+struct mtd_oob_ops {
+ mtd_oob_mode_t mode;
+ size_t len;
+ size_t retlen;
+ size_t ooblen;
+ uint32_t ooboffs;
+ uint8_t *datbuf;
+ uint8_t *oobbuf;
+};
+
struct mtd_info {
u_char type;
u_int32_t flags;
@@ -125,8 +169,10 @@ struct mtd_info {
int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
- int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
- int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+ int (*read_oob) (struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops);
+ int (*write_oob) (struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops);
/*
* Methods to access the protection register area, present in some