From 19b2ce184b9f404d6620adf667a9019e6abcae51 Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Wed, 30 Sep 2020 01:01:20 +0200
Subject: mtd: nand: ecc-hamming: Stop using raw NAND structures
This code is meant to be reused by the SPI-NAND core. Now that the
driver has been cleaned and reorganized, use a generic ECC engine
object to store the driver's data instead of accessing members of the
nand_chip structure. This means adding proper init/cleanup helpers.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-17-miquel.raynal@bootlin.com
---
include/linux/mtd/nand-ecc-sw-hamming.h | 20 ++++++++++++++++++++
include/linux/mtd/rawnand.h | 2 ++
2 files changed, 22 insertions(+)
(limited to 'include/linux/mtd')
diff --git a/include/linux/mtd/nand-ecc-sw-hamming.h b/include/linux/mtd/nand-ecc-sw-hamming.h
index 84a123bf45f3..9d4b4d623741 100644
--- a/include/linux/mtd/nand-ecc-sw-hamming.h
+++ b/include/linux/mtd/nand-ecc-sw-hamming.h
@@ -12,6 +12,26 @@
#include <linux/mtd/nand.h>
+/**
+ * struct nand_ecc_sw_hamming_conf - private software Hamming ECC engine structure
+ * @reqooblen: Save the actual user OOB length requested before overwriting it
+ * @spare_oobbuf: Spare OOB buffer if none is provided
+ * @code_size: Number of bytes needed to store a code (one code per step)
+ * @nsteps: Number of steps
+ * @calc_buf: Buffer to use when calculating ECC bytes
+ * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip
+ * @sm_order: Smart Media special ordering
+ */
+struct nand_ecc_sw_hamming_conf {
+ unsigned int reqooblen;
+ void *spare_oobbuf;
+ unsigned int code_size;
+ unsigned int nsteps;
+ u8 *calc_buf;
+ u8 *code_buf;
+ unsigned int sm_order;
+};
+
int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size,
unsigned char *code, bool sm_order);
int nand_ecc_sw_hamming_calculate(struct nand_device *nand,
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 685d24557e95..0a90a8792d18 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1301,6 +1301,7 @@ static inline int nand_opcode_8bits(unsigned int command)
return 0;
}
+int rawnand_sw_hamming_init(struct nand_chip *chip);
int rawnand_sw_hamming_calculate(struct nand_chip *chip,
const unsigned char *buf,
unsigned char *code);
@@ -1308,6 +1309,7 @@ int rawnand_sw_hamming_correct(struct nand_chip *chip,
unsigned char *buf,
unsigned char *read_ecc,
unsigned char *calc_ecc);
+void rawnand_sw_hamming_cleanup(struct nand_chip *chip);
int rawnand_sw_bch_init(struct nand_chip *chip);
int rawnand_sw_bch_correct(struct nand_chip *chip, unsigned char *buf,
unsigned char *read_ecc, unsigned char *calc_ecc);
--
cgit