mtd: add helpers to set/get features for ONFI nand

Add the set-features(0xef)/get-features(0xee) helpers for ONFI nand.
Also add the necessary macros.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index d245199ccaf3..922f313970d4 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -92,6 +92,8 @@ extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
 #define NAND_CMD_READID         0x90
 #define NAND_CMD_ERASE2         0xd0
 #define NAND_CMD_PARAM          0xec
+#define NAND_CMD_GET_FEATURES   0xee
+#define NAND_CMD_SET_FEATURES   0xef
 #define NAND_CMD_RESET          0xff
 
 #define NAND_CMD_LOCK           0x2a
@@ -229,6 +231,12 @@ typedef enum {
 /* Keep gcc happy */
 struct nand_chip;
 
+/* ONFI feature address */
+#define ONFI_FEATURE_ADDR_TIMING_MODE   0x1
+
+/* ONFI subfeature parameters length */
+#define ONFI_SUBFEATURE_PARAM_LEN       4
+
 struct nand_onfi_params {
         /* rev info and features block */
         /* 'O' 'N' 'F' 'I'  */
@@ -454,6 +462,8 @@ struct nand_buffers {
  *                      non 0 if ONFI supported.
  * @onfi_params:        [INTERN] holds the ONFI page parameter when ONFI is
  *                      supported, 0 otherwise.
+ * @onfi_set_features   [REPLACEABLE] set the features for ONFI nand
+ * @onfi_get_features   [REPLACEABLE] get the features for ONFI nand
  * @ecclayout:          [REPLACEABLE] the default ECC placement scheme
  * @bbt:                [INTERN] bad block table pointer
  * @bbt_td:             [REPLACEABLE] bad block table descriptor for flash
@@ -496,6 +506,10 @@ struct nand_chip {
         int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
                         const uint8_t *buf, int oob_required, int page,
                         int cached, int raw);
+        int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
+                        int feature_addr, uint8_t *subfeature_para);
+        int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
+                        int feature_addr, uint8_t *subfeature_para);
 
         int chip_delay;
         unsigned int options;