31  * Bit 0 of each entry indicates whether the entry has an odd or even parity,
36 	0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
37 	0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
38 	0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
39 	0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
40 	0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
41 	0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
42 	0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
43 	0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
44 	0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
45 	0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
46 	0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
47 	0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
48 	0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
49 	0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
50 	0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
51 	0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
52 	0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0,
53 	0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9,
54 	0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55,
55 	0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c,
56 	0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59,
57 	0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30,
58 	0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc,
59 	0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5,
60 	0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65,
61 	0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c,
62 	0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0,
63 	0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99,
64 	0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc,
65 	0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95,
66 	0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69,
67 	0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00,
75 	unsigned char col_parity = 0;  in yaffs_ecc_calc()
76 	unsigned char line_parity = 0;  in yaffs_ecc_calc()
77 	unsigned char line_parity_prime = 0;  in yaffs_ecc_calc()
81 	for (i = 0; i < 256; i++) {  in yaffs_ecc_calc()
85 		if (b & 0x01) {	/* odd number of bits in the byte */  in yaffs_ecc_calc()
91 	ecc[2] = (~col_parity) | 0x03;  in yaffs_ecc_calc()
93 	t = 0;  in yaffs_ecc_calc()
94 	if (line_parity & 0x80)  in yaffs_ecc_calc()
95 		t |= 0x80;  in yaffs_ecc_calc()
96 	if (line_parity_prime & 0x80)  in yaffs_ecc_calc()
97 		t |= 0x40;  in yaffs_ecc_calc()
98 	if (line_parity & 0x40)  in yaffs_ecc_calc()
99 		t |= 0x20;  in yaffs_ecc_calc()
100 	if (line_parity_prime & 0x40)  in yaffs_ecc_calc()
101 		t |= 0x10;  in yaffs_ecc_calc()
102 	if (line_parity & 0x20)  in yaffs_ecc_calc()
103 		t |= 0x08;  in yaffs_ecc_calc()
104 	if (line_parity_prime & 0x20)  in yaffs_ecc_calc()
105 		t |= 0x04;  in yaffs_ecc_calc()
106 	if (line_parity & 0x10)  in yaffs_ecc_calc()
107 		t |= 0x02;  in yaffs_ecc_calc()
108 	if (line_parity_prime & 0x10)  in yaffs_ecc_calc()
109 		t |= 0x01;  in yaffs_ecc_calc()
112 	t = 0;  in yaffs_ecc_calc()
113 	if (line_parity & 0x08)  in yaffs_ecc_calc()
114 		t |= 0x80;  in yaffs_ecc_calc()
115 	if (line_parity_prime & 0x08)  in yaffs_ecc_calc()
116 		t |= 0x40;  in yaffs_ecc_calc()
117 	if (line_parity & 0x04)  in yaffs_ecc_calc()
118 		t |= 0x20;  in yaffs_ecc_calc()
119 	if (line_parity_prime & 0x04)  in yaffs_ecc_calc()
120 		t |= 0x10;  in yaffs_ecc_calc()
121 	if (line_parity & 0x02)  in yaffs_ecc_calc()
122 		t |= 0x08;  in yaffs_ecc_calc()
123 	if (line_parity_prime & 0x02)  in yaffs_ecc_calc()
124 		t |= 0x04;  in yaffs_ecc_calc()
125 	if (line_parity & 0x01)  in yaffs_ecc_calc()
126 		t |= 0x02;  in yaffs_ecc_calc()
127 	if (line_parity_prime & 0x01)  in yaffs_ecc_calc()
128 		t |= 0x01;  in yaffs_ecc_calc()
129 	ecc[0] = ~t;  in yaffs_ecc_calc()
140 	d0 = read_ecc[0] ^ test_ecc[0];  in yaffs_ecc_correct()
144 	if ((d0 | d1 | d2) == 0)  in yaffs_ecc_correct()
145 		return 0;	/* no error */  in yaffs_ecc_correct()
147 	if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 &&  in yaffs_ecc_correct()
148 	    ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 &&  in yaffs_ecc_correct()
149 	    ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {  in yaffs_ecc_correct()
155 		bit = byte = 0;  in yaffs_ecc_correct()
157 		if (d1 & 0x80)  in yaffs_ecc_correct()
158 			byte |= 0x80;  in yaffs_ecc_correct()
159 		if (d1 & 0x20)  in yaffs_ecc_correct()
160 			byte |= 0x40;  in yaffs_ecc_correct()
161 		if (d1 & 0x08)  in yaffs_ecc_correct()
162 			byte |= 0x20;  in yaffs_ecc_correct()
163 		if (d1 & 0x02)  in yaffs_ecc_correct()
164 			byte |= 0x10;  in yaffs_ecc_correct()
165 		if (d0 & 0x80)  in yaffs_ecc_correct()
166 			byte |= 0x08;  in yaffs_ecc_correct()
167 		if (d0 & 0x20)  in yaffs_ecc_correct()
168 			byte |= 0x04;  in yaffs_ecc_correct()
169 		if (d0 & 0x08)  in yaffs_ecc_correct()
170 			byte |= 0x02;  in yaffs_ecc_correct()
171 		if (d0 & 0x02)  in yaffs_ecc_correct()
172 			byte |= 0x01;  in yaffs_ecc_correct()
174 		if (d2 & 0x80)  in yaffs_ecc_correct()
175 			bit |= 0x04;  in yaffs_ecc_correct()
176 		if (d2 & 0x20)  in yaffs_ecc_correct()
177 			bit |= 0x02;  in yaffs_ecc_correct()
178 		if (d2 & 0x08)  in yaffs_ecc_correct()
179 			bit |= 0x01;  in yaffs_ecc_correct()
189 		read_ecc[0] = test_ecc[0];  in yaffs_ecc_correct()
209 	unsigned char col_parity = 0;  in yaffs_ecc_calc_other()
210 	unsigned line_parity = 0;  in yaffs_ecc_calc_other()
211 	unsigned line_parity_prime = 0;  in yaffs_ecc_calc_other()
214 	for (i = 0; i < n_bytes; i++) {  in yaffs_ecc_calc_other()
218 		if (b & 0x01) {  in yaffs_ecc_calc_other()
226 	ecc_other->col_parity = (col_parity >> 2) & 0x3f;  in yaffs_ecc_calc_other()
245 	if ((delta_col | delta_line | delta_line_prime) == 0)  in yaffs_ecc_correct_other()
246 		return 0;	/* no error */  in yaffs_ecc_correct_other()
249 	    (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) {  in yaffs_ecc_correct_other()
252 		bit = 0;  in yaffs_ecc_correct_other()
254 		if (delta_col & 0x20)  in yaffs_ecc_correct_other()
255 			bit |= 0x04;  in yaffs_ecc_correct_other()
256 		if (delta_col & 0x08)  in yaffs_ecc_correct_other()
257 			bit |= 0x02;  in yaffs_ecc_correct_other()
258 		if (delta_col & 0x02)  in yaffs_ecc_correct_other()
259 			bit |= 0x01;  in yaffs_ecc_correct_other()