Mercurial > yaffs-ecoscentric-gpl
annotate yaffs_mtdif.c @ 66:f5ca021b3db5
Check the return value of mtd->write_ecc() calls.
If not done, write failures will not be detected.
Thanks to Artis Kugevics.
| author | luc <luc> |
|---|---|
| date | Tue, 02 Aug 2005 19:18:44 +0000 |
| parents | dfb2a2e863b4 |
| children | 0113df80498c |
| rev | line source |
|---|---|
| 7 | 1 /* |
| 2 * YAFFS: Yet another FFS. A NAND-flash specific file system. | |
| 3 * yaffs_mtdif.c NAND mtd wrapper functions. | |
| 4 * | |
| 5 * Copyright (C) 2002 Aleph One Ltd. | |
| 6 * for Toby Churchill Ltd and Brightstar Engineering | |
| 7 * | |
| 8 * Created by Charles Manning <charles@aleph1.co.uk> | |
| 9 * | |
| 10 * This program is free software; you can redistribute it and/or modify | |
| 11 * it under the terms of the GNU General Public License version 2 as | |
| 12 * published by the Free Software Foundation. | |
| 13 * | |
| 14 */ | |
| 15 | |
| 66 | 16 const char *yaffs_mtdif_c_version = "$Id: yaffs_mtdif.c,v 1.9 2005-08-02 19:18:44 luc Exp $"; |
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1f2f55618d63
If kernel/config.h is included in yportenv.h, then yportenv.h must be
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17 |
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1f2f55618d63
If kernel/config.h is included in yportenv.h, then yportenv.h must be
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18 #include "yportenv.h" |
| 7 | 19 |
| 49 | 20 #ifdef CONFIG_YAFFS_YAFFS1 |
| 7 | 21 |
| 22 #include "yaffs_mtdif.h" | |
| 23 | |
| 24 #include "linux/mtd/mtd.h" | |
| 25 #include "linux/types.h" | |
| 26 #include "linux/time.h" | |
| 27 #include "linux/mtd/nand.h" | |
| 28 | |
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applied patch 13-sparse-fix--make-some-symbol-static.diff
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29 static struct nand_oobinfo yaffs_oobinfo = { |
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applied patch 11-sparse-fix--use-C99-struct-initializer.diff
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30 .useecc = 1, |
| 65 | 31 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,8)) |
| 32 .eccbytes = 6, | |
| 33 #endif | |
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applied patch 11-sparse-fix--use-C99-struct-initializer.diff
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34 .eccpos = {8, 9, 10, 13, 14, 15} |
| 7 | 35 }; |
| 36 | |
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applied patch 13-sparse-fix--make-some-symbol-static.diff
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37 static struct nand_oobinfo yaffs_noeccinfo = { |
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38 .useecc = 0, |
| 7 | 39 }; |
| 40 | |
| 41 | |
| 23 | 42 int nandmtd_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare) |
| 7 | 43 { |
| 44 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); | |
| 45 size_t dummy; | |
| 46 int retval = 0; | |
| 47 | |
| 48 loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk; | |
| 49 | |
| 50 __u8 *spareAsBytes = (__u8 *)spare; | |
| 51 | |
| 52 if(data && spare) | |
| 53 { | |
| 54 if(dev->useNANDECC) | |
| 66 | 55 retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo); |
| 7 | 56 else |
| 66 | 57 retval = mtd->write_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo); |
| 7 | 58 } |
| 59 else | |
| 60 { | |
| 61 if(data) | |
| 62 retval = mtd->write(mtd,addr,dev->nBytesPerChunk,&dummy,data); | |
| 63 if(spare) | |
| 64 retval = mtd->write_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes); | |
| 65 } | |
| 66 | |
| 67 if (retval == 0) | |
| 68 return YAFFS_OK; | |
| 69 else | |
| 70 return YAFFS_FAIL; | |
| 71 } | |
| 72 | |
| 73 int nandmtd_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare) | |
| 74 { | |
| 75 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); | |
| 76 size_t dummy; | |
| 77 int retval = 0; | |
| 78 | |
| 79 loff_t addr = ((loff_t)chunkInNAND) * dev->nBytesPerChunk; | |
| 80 | |
| 81 __u8 *spareAsBytes = (__u8 *)spare; | |
| 82 | |
| 83 if(data && spare) | |
| 84 { | |
| 85 if(dev->useNANDECC) | |
| 86 { // Careful, this call adds 2 ints to the end of the spare data. Calling function should | |
| 87 // allocate enough memory for spare, i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. | |
| 88 retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo); | |
| 89 } | |
| 90 else | |
| 91 { | |
| 92 retval = mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo); | |
| 93 } | |
| 94 } | |
| 95 else | |
| 96 { | |
| 97 if(data) | |
| 98 retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data); | |
| 99 if(spare) | |
| 100 retval = mtd->read_oob(mtd,addr,YAFFS_BYTES_PER_SPARE,&dummy,spareAsBytes); | |
| 101 } | |
| 102 | |
| 103 if (retval == 0) | |
| 104 return YAFFS_OK; | |
| 105 else | |
| 106 return YAFFS_FAIL; | |
| 107 } | |
| 108 | |
| 109 // Callback not needed for NAND | |
| 110 #if 0 | |
| 111 static void nandmtd_EraseCallback(struct erase_info *ei) | |
| 112 { | |
| 113 yaffs_Device *dev = (yaffs_Device *)ei->priv; | |
| 114 up(&dev->sem); | |
| 115 } | |
| 116 #endif | |
| 117 | |
| 118 | |
| 119 int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) | |
| 120 { | |
| 121 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); | |
| 122 __u32 addr = ((loff_t) blockNumber) * dev->nBytesPerChunk * dev->nChunksPerBlock; | |
| 123 struct erase_info ei; | |
| 124 int retval = 0; | |
| 125 | |
| 126 ei.mtd = mtd; | |
| 127 ei.addr = addr; | |
| 128 ei.len = dev->nBytesPerChunk * dev->nChunksPerBlock; | |
| 129 ei.time = 1000; | |
| 130 ei.retries = 2; | |
| 131 ei.callback = NULL; | |
| 132 ei.priv = (u_long)dev; | |
| 133 | |
| 134 // Todo finish off the ei if required | |
| 135 | |
| 136 sema_init(&dev->sem,0); | |
| 137 | |
| 138 retval = mtd->erase(mtd,&ei); | |
| 139 | |
| 140 //No need for callback | |
| 141 // down(&dev->sem); // Wait for the erasure to complete | |
| 142 | |
| 143 if (retval == 0) | |
| 144 return YAFFS_OK; | |
| 145 else | |
| 146 return YAFFS_FAIL; | |
| 147 } | |
| 148 | |
| 149 int nandmtd_InitialiseNAND(yaffs_Device *dev) | |
| 150 { | |
| 151 return YAFFS_OK; | |
| 152 } | |
| 153 | |
| 49 | 154 #endif // CONFIG_YAFFS_YAFFS1 |
| 7 | 155 |