[package] udev: bump to 173
[openwrt.git] / target / linux / generic / files / fs / yaffs2 / yaffs_mtdif.c
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 const char *yaffs_mtdif_c_version =
15 "$Id: yaffs_mtdif.c,v 1.19 2007-02-14 01:09:06 wookey Exp $";
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/nand.h"
26
27 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
28 static struct nand_oobinfo yaffs_oobinfo = {
29 .useecc = 1,
30 .eccbytes = 6,
31 .eccpos = {8, 9, 10, 13, 14, 15}
32 };
33
34 static struct nand_oobinfo yaffs_noeccinfo = {
35 .useecc = 0,
36 };
37 #endif
38
39 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
40 static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob)
41 {
42 oob[0] = spare->tagByte0;
43 oob[1] = spare->tagByte1;
44 oob[2] = spare->tagByte2;
45 oob[3] = spare->tagByte3;
46 oob[4] = spare->tagByte4;
47 oob[5] = spare->tagByte5 & 0x3f;
48 oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80;
49 oob[5] |= spare->pageStatus == 0 ? 0: 0x40;
50 oob[6] = spare->tagByte6;
51 oob[7] = spare->tagByte7;
52 }
53
54 static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob)
55 {
56 struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare;
57 spare->tagByte0 = oob[0];
58 spare->tagByte1 = oob[1];
59 spare->tagByte2 = oob[2];
60 spare->tagByte3 = oob[3];
61 spare->tagByte4 = oob[4];
62 spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f;
63 spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y';
64 spare->pageStatus = oob[5] & 0x40 ? 0xff : 0;
65 spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff;
66 spare->tagByte6 = oob[6];
67 spare->tagByte7 = oob[7];
68 spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff;
69
70 nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */
71 }
72 #endif
73
74 int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND,
75 const __u8 * data, const yaffs_Spare * spare)
76 {
77 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
78 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
79 struct mtd_oob_ops ops;
80 #endif
81 size_t dummy;
82 int retval = 0;
83
84 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
85 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
86 __u8 spareAsBytes[8]; /* OOB */
87
88 if (data && !spare)
89 retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk,
90 &dummy, data);
91 else if (spare) {
92 if (dev->useNANDECC) {
93 translate_spare2oob(spare, spareAsBytes);
94 ops.mode = MTD_OOB_AUTO;
95 ops.ooblen = 8; /* temp hack */
96 } else {
97 ops.mode = MTD_OOB_RAW;
98 ops.ooblen = YAFFS_BYTES_PER_SPARE;
99 }
100 ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
101 ops.datbuf = (u8 *)data;
102 ops.ooboffs = 0;
103 ops.oobbuf = spareAsBytes;
104 retval = mtd->write_oob(mtd, addr, &ops);
105 }
106 #else
107 __u8 *spareAsBytes = (__u8 *) spare;
108
109 if (data && spare) {
110 if (dev->useNANDECC)
111 retval =
112 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
113 &dummy, data, spareAsBytes,
114 &yaffs_oobinfo);
115 else
116 retval =
117 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
118 &dummy, data, spareAsBytes,
119 &yaffs_noeccinfo);
120 } else {
121 if (data)
122 retval =
123 mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
124 data);
125 if (spare)
126 retval =
127 mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
128 &dummy, spareAsBytes);
129 }
130 #endif
131
132 if (retval == 0)
133 return YAFFS_OK;
134 else
135 return YAFFS_FAIL;
136 }
137
138 int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data,
139 yaffs_Spare * spare)
140 {
141 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
142 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
143 struct mtd_oob_ops ops;
144 #endif
145 size_t dummy;
146 int retval = 0;
147
148 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
149 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
150 __u8 spareAsBytes[8]; /* OOB */
151
152 if (data && !spare)
153 retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
154 &dummy, data);
155 else if (spare) {
156 if (dev->useNANDECC) {
157 ops.mode = MTD_OOB_AUTO;
158 ops.ooblen = 8; /* temp hack */
159 } else {
160 ops.mode = MTD_OOB_RAW;
161 ops.ooblen = YAFFS_BYTES_PER_SPARE;
162 }
163 ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen;
164 ops.datbuf = data;
165 ops.ooboffs = 0;
166 ops.oobbuf = spareAsBytes;
167 retval = mtd->read_oob(mtd, addr, &ops);
168 if (dev->useNANDECC)
169 translate_oob2spare(spare, spareAsBytes);
170 }
171 #else
172 __u8 *spareAsBytes = (__u8 *) spare;
173
174 if (data && spare) {
175 if (dev->useNANDECC) {
176 /* Careful, this call adds 2 ints */
177 /* to the end of the spare data. Calling function */
178 /* should allocate enough memory for spare, */
179 /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */
180 retval =
181 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
182 &dummy, data, spareAsBytes,
183 &yaffs_oobinfo);
184 } else {
185 retval =
186 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
187 &dummy, data, spareAsBytes,
188 &yaffs_noeccinfo);
189 }
190 } else {
191 if (data)
192 retval =
193 mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
194 data);
195 if (spare)
196 retval =
197 mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE,
198 &dummy, spareAsBytes);
199 }
200 #endif
201
202 if (retval == 0)
203 return YAFFS_OK;
204 else
205 return YAFFS_FAIL;
206 }
207
208 int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber)
209 {
210 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
211 __u32 addr =
212 ((loff_t) blockNumber) * dev->nDataBytesPerChunk
213 * dev->nChunksPerBlock;
214 struct erase_info ei;
215 int retval = 0;
216
217 ei.mtd = mtd;
218 ei.addr = addr;
219 ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock;
220 ei.time = 1000;
221 ei.retries = 2;
222 ei.callback = NULL;
223 ei.priv = (u_long) dev;
224
225 /* Todo finish off the ei if required */
226
227 sema_init(&dev->sem, 0);
228
229 retval = mtd->erase(mtd, &ei);
230
231 if (retval == 0)
232 return YAFFS_OK;
233 else
234 return YAFFS_FAIL;
235 }
236
237 int nandmtd_InitialiseNAND(yaffs_Device * dev)
238 {
239 return YAFFS_OK;
240 }
241
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