yaffs all timothy_tests makefiles are working. threading test is broken.

[yaffs2.git] / yaffs_ecc.c

diff --git a/yaffs_ecc.c b/yaffs_ecc.c
index e95a8069a8c5bc0c754b9f41ddbc9944e0b76f98..9294107c150d261bbb6c90c8c78b6590ba4b97a4 100644 (file)
--- a/yaffs_ecc.c
+++ b/yaffs_ecc.c
@@ -1,7 +1,7 @@
 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
- * Copyright (C) 2002-2010 Aleph One Ltd.
+ * Copyright (C) 2002-2011 Aleph One Ltd.
  *   for Toby Churchill Ltd and Brightstar Engineering
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
@@ -16,22 +16,22 @@
  *
  * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes.
  * The two unused bit are set to 1.
- * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC
- * blocks are used on a 512-byte NAND page.
+ * The ECC can correct single bit errors in a 256-byte page of data. Thus, two
+ * such ECC blocks are used on a 512-byte NAND page.
  *
  */
 
+#include "yportenv.h"
+
+#include "yaffs_ecc.h"
+
 /* Table generated by gen-ecc.c
  * Using a table means we do not have to calculate p1..p4 and p1'..p4'
  * for each byte of data. These are instead provided in a table in bits7..2.
- * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore
- * this bytes influence on the line parity.
+ * Bit 0 of each entry indicates whether the entry has an odd or even parity,
+ * and therefore this bytes influence on the line parity.
  */
 
-#include "yportenv.h"
-
-#include "yaffs_ecc.h"
-
 static const unsigned char column_parity_table[] = {
        0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
        0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
@@ -69,10 +69,9 @@ static const unsigned char column_parity_table[] = {
 
 
 /* Calculate the ECC for a 256-byte block of data */
-void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc)
+void yaffs_ecc_calc(const unsigned char *data, unsigned char *ecc)
 {
        unsigned int i;
-
        unsigned char col_parity = 0;
        unsigned char line_parity = 0;
        unsigned char line_parity_prime = 0;
@@ -129,12 +128,6 @@ void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc)
                t |= 0x01;
        ecc[0] = ~t;
 
-#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
-       /* Swap the bytes into the wrong order */
-       t = ecc[0];
-       ecc[0] = ecc[1];
-       ecc[1] = t;
-#endif
 }
 
 /* Correct the ECC on a 256 byte block of data */
@@ -159,15 +152,6 @@ int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc,
                unsigned byte;
                unsigned bit;
 
-#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER
-               /* swap the bytes to correct for the wrong order */
-               unsigned char t;
-
-               t = d0;
-               d0 = d1;
-               d1 = t;
-#endif
-
                bit = byte = 0;
 
                if (d1 & 0x80)
@@ -222,7 +206,6 @@ void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
                          struct yaffs_ecc_other *ecc_other)
 {
        unsigned int i;
-
        unsigned char col_parity = 0;
        unsigned line_parity = 0;
        unsigned line_parity_prime = 0;