From: Dinesh Maniyam <dinesh.maniyam@intel.com>
Date: Wed, 26 Feb 2025 16:18:22 +0000 (+0800)
Subject: drivers: mtd: nand: cadence: Support cmd SET_FEATURES & GET_FEATURES
X-Git-Tag: v2025.07-rc1~18^2~32^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36b2a5d676b4a13c8e66b30d8ff99a5e529fd6d2;p=pandora-u-boot.git

drivers: mtd: nand: cadence: Support cmd SET_FEATURES & GET_FEATURES

Support NAND_CMD_SET_FEATURES & NAND_CMD_GET_FEATURES.
These commands is one of the basic commands of NAND. The parameters get
from these commands will be used to set timing mode
of NAND data interface.

Signed-off-by: Dinesh Maniyam <dinesh.maniyam@intel.com>
---

diff --git a/drivers/mtd/nand/raw/cadence_nand.c b/drivers/mtd/nand/raw/cadence_nand.c
index 720b0ebd6ae..71bab973776 100644
--- a/drivers/mtd/nand/raw/cadence_nand.c
+++ b/drivers/mtd/nand/raw/cadence_nand.c
@@ -2010,6 +2010,29 @@ static int cadence_nand_reset(struct mtd_info *mtd, unsigned int command)
 	return 0;
 }
 
+static int cadence_nand_features(struct mtd_info *mtd, u8 offset_in_page, u32 command)
+{
+	struct nand_chip *chip = mtd_to_nand(mtd);
+	int ret = 0;
+
+	ret = cadence_nand_cmd_opcode(chip, command);
+	if (ret)
+		return ret;
+
+	ret = cadence_nand_cmd_address(chip, ONE_CYCLE, &offset_in_page);
+	if (ret)
+		return ret;
+
+	if (command == NAND_CMD_GET_FEATURES)
+		ret = cadence_nand_cmd_data(chip, ONFI_SUBFEATURE_PARAM_LEN,
+					    GCMD_DIR_READ);
+	else
+		ret = cadence_nand_cmd_data(chip, ONFI_SUBFEATURE_PARAM_LEN,
+					    GCMD_DIR_WRITE);
+
+	return ret;
+}
+
 static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
 				 int offset_in_page, int page)
 {
@@ -2034,6 +2057,11 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
 	case NAND_CMD_RESET:
 		ret = cadence_nand_reset(mtd, command);
 		break;
+
+	case NAND_CMD_SET_FEATURES:
+	case NAND_CMD_GET_FEATURES:
+		ret = cadence_nand_features(mtd, offset_in_page, command);
+		break;
 	/*
 	 * ecc will override other command for read, write and erase
 	 */
@@ -2076,6 +2104,8 @@ static u8 cadence_nand_read_byte(struct mtd_info *mtd)
 			size = 8;
 		else if (cadence->cmd == NAND_CMD_PARAM)
 			size = sizeof(struct nand_jedec_params);
+		else if (cadence->cmd == NAND_CMD_GET_FEATURES)
+			size = ONFI_SUBFEATURE_PARAM_LEN;
 
 		cadence_nand_read_buf(mtd, &cadence->buf[0], size);
 	}