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, 50 insertions, 0 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 88f671cb96c7..d06a80d4ee75 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2700,6 +2700,50 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
 }
 
 /**
+ * nand_onfi_set_features- [REPLACEABLE] set features for ONFI nand
+ * @mtd: MTD device structure
+ * @chip: nand chip info structure
+ * @addr: feature address.
+ * @subfeature_param: the subfeature parameters, a four bytes array.
+ */
+static int nand_onfi_set_features(struct mtd_info *mtd, struct nand_chip *chip,
+			int addr, uint8_t *subfeature_param)
+{
+	int status;
+
+	if (!chip->onfi_version)
+		return -EINVAL;
+
+	chip->cmdfunc(mtd, NAND_CMD_SET_FEATURES, addr, -1);
+	chip->write_buf(mtd, subfeature_param, ONFI_SUBFEATURE_PARAM_LEN);
+	status = chip->waitfunc(mtd, chip);
+	if (status & NAND_STATUS_FAIL)
+		return -EIO;
+	return 0;
+}
+
+/**
+ * nand_onfi_get_features- [REPLACEABLE] get features for ONFI nand
+ * @mtd: MTD device structure
+ * @chip: nand chip info structure
+ * @addr: feature address.
+ * @subfeature_param: the subfeature parameters, a four bytes array.
+ */
+static int nand_onfi_get_features(struct mtd_info *mtd, struct nand_chip *chip,
+			int addr, uint8_t *subfeature_param)
+{
+	if (!chip->onfi_version)
+		return -EINVAL;
+
+	/* clear the sub feature parameters */
+	memset(subfeature_param, 0, ONFI_SUBFEATURE_PARAM_LEN);
+
+	chip->cmdfunc(mtd, NAND_CMD_GET_FEATURES, addr, -1);
+	chip->read_buf(mtd, subfeature_param, ONFI_SUBFEATURE_PARAM_LEN);
+	return 0;
+}
+
+/**
  * nand_suspend - [MTD Interface] Suspend the NAND flash
  * @mtd: MTD device structure
  */
@@ -3223,6 +3267,12 @@ int nand_scan_tail(struct mtd_info *mtd)
 	if (!chip->write_page)
 		chip->write_page = nand_write_page;
 
+	/* set for ONFI nand */
+	if (!chip->onfi_set_features)
+		chip->onfi_set_features = nand_onfi_set_features;
+	if (!chip->onfi_get_features)
+		chip->onfi_get_features = nand_onfi_get_features;
+
 	/*
 	 * Check ECC mode, default to software if 3byte/512byte hardware ECC is
 	 * selected and we have 256 byte pagesize fallback to software ECC