* ECCxxxOther does ECC calcs on arbitrary n bytes of data
*/
void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes,
- yaffs_ECCOther *eccOther)
+ yaffs_ecc_other *ecc_other)
{
unsigned int i;
}
- eccOther->colParity = (col_parity >> 2) & 0x3f;
- eccOther->lineParity = line_parity;
- eccOther->lineParityPrime = line_parity_prime;
+ ecc_other->col_parity = (col_parity >> 2) & 0x3f;
+ ecc_other->line_parity = line_parity;
+ ecc_other->line_parity_prime = line_parity_prime;
}
int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes,
- yaffs_ECCOther *read_ecc,
- const yaffs_ECCOther *test_ecc)
+ yaffs_ecc_other *read_ecc,
+ const yaffs_ecc_other *test_ecc)
{
- unsigned char cDelta; /* column parity delta */
- unsigned lDelta; /* line parity delta */
- unsigned lDeltaPrime; /* line parity delta */
+ unsigned char delta_col; /* column parity delta */
+ unsigned delta_line; /* line parity delta */
+ unsigned delta_line_prime; /* line parity delta */
unsigned bit;
- cDelta = read_ecc->colParity ^ test_ecc->colParity;
- lDelta = read_ecc->lineParity ^ test_ecc->lineParity;
- lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime;
+ delta_col = read_ecc->col_parity ^ test_ecc->col_parity;
+ delta_line = read_ecc->line_parity ^ test_ecc->line_parity;
+ delta_line_prime = read_ecc->line_parity_prime ^ test_ecc->line_parity_prime;
- if ((cDelta | lDelta | lDeltaPrime) == 0)
+ if ((delta_col | delta_line | delta_line_prime) == 0)
return 0; /* no error */
- if (lDelta == ~lDeltaPrime &&
- (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) {
+ if (delta_line == ~delta_line_prime &&
+ (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {
/* Single bit (recoverable) error in data */
bit = 0;
- if (cDelta & 0x20)
+ if (delta_col & 0x20)
bit |= 0x04;
- if (cDelta & 0x08)
+ if (delta_col & 0x08)
bit |= 0x02;
- if (cDelta & 0x02)
+ if (delta_col & 0x02)
bit |= 0x01;
- if (lDelta >= n_bytes)
+ if (delta_line >= n_bytes)
return -1;
- data[lDelta] ^= (1 << bit);
+ data[delta_line] ^= (1 << bit);
return 1; /* corrected */
}
- if ((yaffs_count_bits32(lDelta) + yaffs_count_bits32(lDeltaPrime) +
- yaffs_count_bits(cDelta)) == 1) {
+ if ((yaffs_count_bits32(delta_line) + yaffs_count_bits32(delta_line_prime) +
+ yaffs_count_bits(delta_col)) == 1) {
/* Reccoverable error in ecc */
*read_ecc = *test_ecc;