add ondie and software ECC code

Author: rogeryou

storage/blockdevice/COMPONENT_SPINAND/include/SPINAND/SPINANDBlockDevice.h

@@ -272,6 +272,9 @@ class SPINANDBlockDevice : public mbed::BlockDevice {
     /* Flash Configuration Functions */
     /*********************************/
 
+    // Read OTP ONFI parameters
+    bool _read_otp_onfi();
+
     // Quad Enable in Security Register
     int _set_quad_enable();
 
@@ -283,7 +286,10 @@ class SPINANDBlockDevice : public mbed::BlockDevice {
 
     // Wait on status register until write not-in-progress
     bool _is_mem_ready();
-
+    void _bch_init(uint8_t ecc_bits);
+    void _bch_free();
+    int _bch_calculate_ecc(unsigned char* buf, unsigned char* code);
+    int _bch_correct_data(unsigned char* buf, unsigned char* read_ecc, unsigned char* calc_ecc);
 private:
 
     // QSPI Driver Object
@@ -320,6 +326,22 @@ class SPINANDBlockDevice : public mbed::BlockDevice {
 
     uint32_t _init_ref_count;
     bool _is_initialized;
+    char _name[32];
+    uint32_t _page_size, _block_size, _flash_size;
+    uint8_t _page_shift, _block_shift;
+    uint16_t _block_num, _page_num, _oob_size;
+    uint8_t _ecc_bits, _ecc_bytes, _ecc_steps, _ecc_layout_pos;
+    uint32_t  _ecc_size;
+    uint8_t *_ecc_calc;
+    uint8_t *_ecc_code;
+    uint8_t *_page_buf;
+
+    struct nand_bch_control {
+        struct bch_control   *bch;
+        unsigned int         *errloc;
+        unsigned char        *eccmask;
+    };
+    struct nand_bch_control _nbc;
 };
 
 #endif

storage/blockdevice/COMPONENT_SPINAND/include/SPINAND/bch.h

@@ -0,0 +1,94 @@
+/*
+ * Generic binary BCH encoding/decoding library
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright © 2011 Parrot S.A.
+ *
+ * Author: Ivan Djelic <[email protected]>
+ *
+ * Description:
+ *
+ * This library provides runtime configurable encoding/decoding of binary
+ * Bose-Chaudhuri-Hocquenghem (BCH) codes.
+*/
+#ifndef _BCH_H
+#define _BCH_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+#include <stdint.h>
+//typedef unsigned char   uint8_t;
+//typedef unsigned short  uint16_t;
+//typedef unsigned int    uint32_t;
+
+#define DIV_ROUND_UP(n, d)  (((n) + (d) - 1) / (d))
+#define ARRAY_SIZE(arr)     (sizeof(arr) / sizeof((arr)[0]))
+/**
+ * struct bch_control - BCH control structure
+ * @m:          Galois field order
+ * @n:          maximum codeword size in bits (= 2^m-1)
+ * @t:          error correction capability in bits
+ * @ecc_bits:   ecc exact size in bits, i.e. generator polynomial degree (<=m*t)
+ * @ecc_bytes:  ecc max size (m*t bits) in bytes
+ * @a_pow_tab:  Galois field GF(2^m) exponentiation lookup table
+ * @a_log_tab:  Galois field GF(2^m) log lookup table
+ * @mod8_tab:   remainder generator polynomial lookup tables
+ * @ecc_buf:    ecc parity words buffer
+ * @ecc_buf2:   ecc parity words buffer
+ * @xi_tab:     GF(2^m) base for solving degree 2 polynomial roots
+ * @syn:        syndrome buffer
+ * @cache:      log-based polynomial representation buffer
+ * @elp:        error locator polynomial
+ * @poly_2t:    temporary polynomials of degree 2t
+ */
+struct bch_control {
+    unsigned int    m;
+    unsigned int    n;
+    unsigned int    t;
+    unsigned int    ecc_bits;
+    unsigned int    ecc_bytes;
+/* private: */
+    uint16_t       *a_pow_tab;
+    uint16_t       *a_log_tab;
+    uint32_t       *mod8_tab;
+    uint32_t       *ecc_buf;
+    uint32_t       *ecc_buf2;
+    unsigned int   *xi_tab;
+    unsigned int   *syn;
+    int            *cache;
+    struct gf_poly *elp;
+    struct gf_poly *poly_2t[4];
+};
+
+struct bch_control *init_bch(int m, int t, unsigned int prim_poly);
+
+void free_bch(struct bch_control *bch);
+
+void encode_bch(struct bch_control *bch, const uint8_t *data,
+        unsigned int len, uint8_t *ecc);
+
+int decode_bch(struct bch_control *bch, const uint8_t *data, unsigned int len,
+           const uint8_t *recv_ecc, const uint8_t *calc_ecc,
+           const unsigned int *syn, unsigned int *errloc);
+int fls(int x);
+#ifdef _X86_
+#define cpu_to_be32(x)  ((((x)&0xff)<<24) | (((x)&0xff00)<<8) | (((x)>>8)&0xff00) | (((x)>>24)&0xff))
+#else
+#define cpu_to_be32(x)  x
+#endif
+#ifdef __cplusplus
+}
+#endif
+#endif /* _BCH_H */