1 /*
2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3 *
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
6 *
7 * Created by Charles Manning <charles@aleph1.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* XXX U-BOOT XXX */
15 #include <common.h>
16
17 #include "yportenv.h"
18
19
20 #include "yaffs_mtdif.h"
21
22 #include <linux/mtd/mtd.h>
23 #include <linux/types.h>
24 #include <linux/time.h>
25 #include <linux/mtd/rawnand.h>
26
27
translate_spare2oob(const struct yaffs_spare * spare,u8 * oob)28 static inline void translate_spare2oob(const struct yaffs_spare *spare, u8 *oob)
29 {
30 oob[0] = spare->tb0;
31 oob[1] = spare->tb1;
32 oob[2] = spare->tb2;
33 oob[3] = spare->tb3;
34 oob[4] = spare->tb4;
35 oob[5] = spare->tb5 & 0x3f;
36 oob[5] |= spare->block_status == 'Y' ? 0 : 0x80;
37 oob[5] |= spare->page_status == 0 ? 0 : 0x40;
38 oob[6] = spare->tb6;
39 oob[7] = spare->tb7;
40 }
41
translate_oob2spare(struct yaffs_spare * spare,u8 * oob)42 static inline void translate_oob2spare(struct yaffs_spare *spare, u8 *oob)
43 {
44 struct yaffs_nand_spare *nspare = (struct yaffs_nand_spare *)spare;
45 spare->tb0 = oob[0];
46 spare->tb1 = oob[1];
47 spare->tb2 = oob[2];
48 spare->tb3 = oob[3];
49 spare->tb4 = oob[4];
50 spare->tb5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
51 spare->block_status = oob[5] & 0x80 ? 0xff : 'Y';
52 spare->page_status = oob[5] & 0x40 ? 0xff : 0;
53 spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
54 spare->tb6 = oob[6];
55 spare->tb7 = oob[7];
56 spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
57
58 nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
59 }
60
61
nandmtd_WriteChunkToNAND(struct yaffs_dev * dev,int chunkInNAND,const u8 * data,const struct yaffs_spare * spare)62 int nandmtd_WriteChunkToNAND(struct yaffs_dev *dev, int chunkInNAND,
63 const u8 *data, const struct yaffs_spare *spare)
64 {
65 struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
66 struct mtd_oob_ops ops;
67 size_t dummy;
68 int retval = 0;
69 loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
70 u8 spareAsBytes[8]; /* OOB */
71
72 if (data && !spare)
73 retval = mtd_write(mtd, addr, dev->data_bytes_per_chunk,
74 &dummy, data);
75 else if (spare) {
76 if (dev->param.use_nand_ecc) {
77 translate_spare2oob(spare, spareAsBytes);
78 ops.mode = MTD_OPS_AUTO_OOB;
79 ops.ooblen = 8; /* temp hack */
80 } else {
81 ops.mode = MTD_OPS_RAW;
82 ops.ooblen = YAFFS_BYTES_PER_SPARE;
83 }
84 ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
85 ops.datbuf = (u8 *)data;
86 ops.ooboffs = 0;
87 ops.oobbuf = spareAsBytes;
88 retval = mtd_write_oob(mtd, addr, &ops);
89 }
90
91 if (retval == 0)
92 return YAFFS_OK;
93 else
94 return YAFFS_FAIL;
95 }
96
nandmtd_ReadChunkFromNAND(struct yaffs_dev * dev,int chunkInNAND,u8 * data,struct yaffs_spare * spare)97 int nandmtd_ReadChunkFromNAND(struct yaffs_dev *dev, int chunkInNAND, u8 *data,
98 struct yaffs_spare *spare)
99 {
100 struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
101 struct mtd_oob_ops ops;
102 size_t dummy;
103 int retval = 0;
104
105 loff_t addr = ((loff_t) chunkInNAND) * dev->data_bytes_per_chunk;
106 u8 spareAsBytes[8]; /* OOB */
107
108 if (data && !spare)
109 retval = mtd_read(mtd, addr, dev->data_bytes_per_chunk,
110 &dummy, data);
111 else if (spare) {
112 if (dev->param.use_nand_ecc) {
113 ops.mode = MTD_OPS_AUTO_OOB;
114 ops.ooblen = 8; /* temp hack */
115 } else {
116 ops.mode = MTD_OPS_RAW;
117 ops.ooblen = YAFFS_BYTES_PER_SPARE;
118 }
119 ops.len = data ? dev->data_bytes_per_chunk : ops.ooblen;
120 ops.datbuf = data;
121 ops.ooboffs = 0;
122 ops.oobbuf = spareAsBytes;
123 retval = mtd_read_oob(mtd, addr, &ops);
124 if (dev->param.use_nand_ecc)
125 translate_oob2spare(spare, spareAsBytes);
126 }
127
128 if (retval == 0)
129 return YAFFS_OK;
130 else
131 return YAFFS_FAIL;
132 }
133
nandmtd_EraseBlockInNAND(struct yaffs_dev * dev,int blockNumber)134 int nandmtd_EraseBlockInNAND(struct yaffs_dev *dev, int blockNumber)
135 {
136 struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
137 __u32 addr =
138 ((loff_t) blockNumber) * dev->data_bytes_per_chunk
139 * dev->param.chunks_per_block;
140 struct erase_info ei;
141 int retval = 0;
142
143 ei.mtd = mtd;
144 ei.addr = addr;
145 ei.len = dev->data_bytes_per_chunk * dev->param.chunks_per_block;
146 ei.time = 1000;
147 ei.retries = 2;
148 ei.callback = NULL;
149 ei.priv = (u_long) dev;
150
151 /* Todo finish off the ei if required */
152
153
154 retval = mtd_erase(mtd, &ei);
155
156 if (retval == 0)
157 return YAFFS_OK;
158 else
159 return YAFFS_FAIL;
160 }
161
nandmtd_InitialiseNAND(struct yaffs_dev * dev)162 int nandmtd_InitialiseNAND(struct yaffs_dev *dev)
163 {
164 return YAFFS_OK;
165 }
166