From 6d3fa0dfdd3cc0e5067785fcb9ca6267b1501fa4 Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Mon, 6 Nov 2017 18:16:10 -0800 Subject: [PATCH] mtd: nand: zynq: Add support for the NAND lock/unlock operation Zynq NAND driver is not support for NAND lock or unlock operation. Hence, accidentally write into the critical NAND region might cause data corruption to occur. This commit is to add NAND lock/unlock command into NAND SMC register set for NAND lock/unlock operaion. Signed-off-by: Joe Hershberger Signed-off-by: Keng Soon Cheah Cc: Chen Yee Chew Cc: Siva Durga Prasad Paladugu Cc: Michal Simek Cc: Scott Wood Signed-off-by: Michal Simek --- drivers/mtd/nand/zynq_nand.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/mtd/nand/zynq_nand.c b/drivers/mtd/nand/zynq_nand.c index e6c80b5b5c..076b878244 100644 --- a/drivers/mtd/nand/zynq_nand.c +++ b/drivers/mtd/nand/zynq_nand.c @@ -84,6 +84,13 @@ #define ZYNQ_NAND_ECC_BUSY (1 << 6) /* ECC block is busy */ #define ZYNQ_NAND_ECC_MASK 0x00FFFFFF /* ECC value mask */ +#ifndef NAND_CMD_LOCK_TIGHT +#define NAND_CMD_LOCK_TIGHT 0x2c +#endif + +#ifndef NAND_CMD_LOCK_STATUS +#define NAND_CMD_LOCK_STATUS 0x7a +#endif /* SMC register set */ struct zynq_nand_smc_regs { @@ -144,6 +151,11 @@ static const struct zynq_nand_command_format zynq_nand_commands[] = { {NAND_CMD_PARAM, NAND_CMD_NONE, 1, 0}, {NAND_CMD_GET_FEATURES, NAND_CMD_NONE, 1, 0}, {NAND_CMD_SET_FEATURES, NAND_CMD_NONE, 1, 0}, + {NAND_CMD_LOCK, NAND_CMD_NONE, 0, 0}, + {NAND_CMD_LOCK_TIGHT, NAND_CMD_NONE, 0, 0}, + {NAND_CMD_UNLOCK1, NAND_CMD_NONE, 3, 0}, + {NAND_CMD_UNLOCK2, NAND_CMD_NONE, 3, 0}, + {NAND_CMD_LOCK_STATUS, NAND_CMD_NONE, 3, 0}, {NAND_CMD_NONE, NAND_CMD_NONE, 0, 0}, /* Add all the flash commands supported by the flash device */ }; -- 2.39.5