41 	0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
42 	0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
43 	0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
44 	0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
45 	0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
46 	0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
47 	0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
48 	0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
49 	0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
50 	0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
51 	0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
52 	0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
53 	0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
54 	0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
55 	0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
56 	0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
72 	reg1 = reg2 = reg3 = 0;  in nand_calculate_ecc()
75 	for(i = 0; i < 256; i++) {  in nand_calculate_ecc()
78 		reg1 ^= (idx & 0x3f);  in nand_calculate_ecc()
81 		if (idx & 0x40) {  in nand_calculate_ecc()
88 	tmp1  = (reg3 & 0x80) >> 0; /* B7 -> B7 */  in nand_calculate_ecc()
89 	tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */  in nand_calculate_ecc()
90 	tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */  in nand_calculate_ecc()
91 	tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */  in nand_calculate_ecc()
92 	tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */  in nand_calculate_ecc()
93 	tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */  in nand_calculate_ecc()
94 	tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */  in nand_calculate_ecc()
95 	tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */  in nand_calculate_ecc()
97 	tmp2  = (reg3 & 0x08) << 4; /* B3 -> B7 */  in nand_calculate_ecc()
98 	tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */  in nand_calculate_ecc()
99 	tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */  in nand_calculate_ecc()
100 	tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */  in nand_calculate_ecc()
101 	tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */  in nand_calculate_ecc()
102 	tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */  in nand_calculate_ecc()
103 	tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */  in nand_calculate_ecc()
104 	tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */  in nand_calculate_ecc()
107 	ecc_code[0] = ~tmp1;  in nand_calculate_ecc()
109 	ecc_code[2] = ((~reg1) << 2) | 0x03;  in nand_calculate_ecc()
111 	return 0;  in nand_calculate_ecc()
117 	int res = 0;  in countbits()
120 		res += byte & 0x01;  in countbits()
138 	s1 = calc_ecc[0] ^ read_ecc[0];  in nand_correct_data()
141 	if ((s0 | s1 | s2) == 0)  in nand_correct_data()
142 		return 0;  in nand_correct_data()
145 	if( ((s0 ^ (s0 >> 1)) & 0x55) == 0x55 &&  in nand_correct_data()
146 	    ((s1 ^ (s1 >> 1)) & 0x55) == 0x55 &&  in nand_correct_data()
147 	    ((s2 ^ (s2 >> 1)) & 0x54) == 0x54) {  in nand_correct_data()
151 		byteoffs = (s1 << 0) & 0x80;  in nand_correct_data()
152 		byteoffs |= (s1 << 1) & 0x40;  in nand_correct_data()
153 		byteoffs |= (s1 << 2) & 0x20;  in nand_correct_data()
154 		byteoffs |= (s1 << 3) & 0x10;  in nand_correct_data()
156 		byteoffs |= (s0 >> 4) & 0x08;  in nand_correct_data()
157 		byteoffs |= (s0 >> 3) & 0x04;  in nand_correct_data()
158 		byteoffs |= (s0 >> 2) & 0x02;  in nand_correct_data()
159 		byteoffs |= (s0 >> 1) & 0x01;  in nand_correct_data()
161 		bitnum = (s2 >> 5) & 0x04;  in nand_correct_data()
162 		bitnum |= (s2 >> 4) & 0x02;  in nand_correct_data()
163 		bitnum |= (s2 >> 3) & 0x01;  in nand_correct_data()