sravan/Marlin-Firmware
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Patch SD lib files for readability

Browse Source
This commit is contained in:
Scott Lahteine
2017-11-15 00:06:20 -06:00
parent e70b44dc0b
commit 9f8b4c5ee8
15 changed files with 1345 additions and 1644 deletions
Download Patch File Download Diff File Expand all files Collapse all files

179
Marlin/src/sd/SdVolume.cpp
View File

@@ -35,7 +35,6 @@
#include "../Marlin.h"
//------------------------------------------------------------------------------
#if !USE_MULTIPLE_CARDS
// raw block cache
uint32_t SdVolume::cacheBlockNumber_; // current block number
@@ -44,7 +43,7 @@
bool SdVolume::cacheDirty_; // cacheFlush() will write block if true
uint32_t SdVolume::cacheMirrorBlock_; // mirror block for second FAT
#endif // USE_MULTIPLE_CARDS
//------------------------------------------------------------------------------
// find a contiguous group of clusters
bool SdVolume::allocContiguous(uint32_t count, uint32_t* curCluster) {
// start of group
@@ -78,14 +77,14 @@ bool SdVolume::allocContiguous(uint32_t count, uint32_t* curCluster) {
// search the FAT for free clusters
for (uint32_t n = 0;; n++, endCluster++) {
// can't find space checked all clusters
if (n >= clusterCount_) goto FAIL;
if (n >= clusterCount_) return false;
// past end - start from beginning of FAT
if (endCluster > fatEnd) {
bgnCluster = endCluster = 2;
}
uint32_t f;
if (!fatGet(endCluster, &f)) goto FAIL;
if (!fatGet(endCluster, &f)) return false;
if (f != 0) {
// cluster in use try next cluster as bgnCluster
@@ -97,16 +96,16 @@ bool SdVolume::allocContiguous(uint32_t count, uint32_t* curCluster) {
}
}
// mark end of chain
if (!fatPutEOC(endCluster)) goto FAIL;
if (!fatPutEOC(endCluster)) return false;
// link clusters
while (endCluster > bgnCluster) {
if (!fatPut(endCluster - 1, endCluster)) goto FAIL;
if (!fatPut(endCluster - 1, endCluster)) return false;
endCluster--;
}
if (*curCluster != 0) {
// connect chains
if (!fatPut(*curCluster, bgnCluster)) goto FAIL;
if (!fatPut(*curCluster, bgnCluster)) return false;
}
// return first cluster number to caller
*curCluster = bgnCluster;
@@ -115,111 +114,94 @@ bool SdVolume::allocContiguous(uint32_t count, uint32_t* curCluster) {
if (setStart) allocSearchStart_ = bgnCluster + 1;
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
bool SdVolume::cacheFlush() {
if (cacheDirty_) {
if (!sdCard_->writeBlock(cacheBlockNumber_, cacheBuffer_.data)) {
goto FAIL;
}
if (!sdCard_->writeBlock(cacheBlockNumber_, cacheBuffer_.data))
return false;
// mirror FAT tables
if (cacheMirrorBlock_) {
if (!sdCard_->writeBlock(cacheMirrorBlock_, cacheBuffer_.data)) {
goto FAIL;
}
if (!sdCard_->writeBlock(cacheMirrorBlock_, cacheBuffer_.data))
return false;
cacheMirrorBlock_ = 0;
}
cacheDirty_ = 0;
}
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
bool SdVolume::cacheRawBlock(uint32_t blockNumber, bool dirty) {
if (cacheBlockNumber_ != blockNumber) {
if (!cacheFlush()) goto FAIL;
if (!sdCard_->readBlock(blockNumber, cacheBuffer_.data)) goto FAIL;
if (!cacheFlush()) return false;
if (!sdCard_->readBlock(blockNumber, cacheBuffer_.data)) return false;
cacheBlockNumber_ = blockNumber;
}
if (dirty) cacheDirty_ = true;
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
// return the size in bytes of a cluster chain
bool SdVolume::chainSize(uint32_t cluster, uint32_t* size) {
uint32_t s = 0;
do {
if (!fatGet(cluster, &cluster)) goto FAIL;
if (!fatGet(cluster, &cluster)) return false;
s += 512UL << clusterSizeShift_;
} while (!isEOC(cluster));
*size = s;
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
// Fetch a FAT entry
bool SdVolume::fatGet(uint32_t cluster, uint32_t* value) {
uint32_t lba;
if (cluster > (clusterCount_ + 1)) goto FAIL;
if (cluster > (clusterCount_ + 1)) return false;
if (FAT12_SUPPORT && fatType_ == 12) {
uint16_t index = cluster;
index += index >> 1;
lba = fatStartBlock_ + (index >> 9);
if (!cacheRawBlock(lba, CACHE_FOR_READ)) goto FAIL;
if (!cacheRawBlock(lba, CACHE_FOR_READ)) return false;
index &= 0x1FF;
uint16_t tmp = cacheBuffer_.data[index];
index++;
if (index == 512) {
if (!cacheRawBlock(lba + 1, CACHE_FOR_READ)) goto FAIL;
if (!cacheRawBlock(lba + 1, CACHE_FOR_READ)) return false;
index = 0;
}
tmp |= cacheBuffer_.data[index] << 8;
*value = cluster & 1 ? tmp >> 4 : tmp & 0xFFF;
return true;
}
if (fatType_ == 16) {
if (fatType_ == 16)
lba = fatStartBlock_ + (cluster >> 8);
}
else if (fatType_ == 32) {
else if (fatType_ == 32)
lba = fatStartBlock_ + (cluster >> 7);
}
else {
goto FAIL;
}
if (lba != cacheBlockNumber_) {
if (!cacheRawBlock(lba, CACHE_FOR_READ)) goto FAIL;
}
if (fatType_ == 16) {
*value = cacheBuffer_.fat16[cluster & 0xFF];
}
else {
*value = cacheBuffer_.fat32[cluster & 0x7F] & FAT32MASK;
}
else
return false;
if (lba != cacheBlockNumber_ && !cacheRawBlock(lba, CACHE_FOR_READ))
return false;
*value = (fatType_ == 16) ? cacheBuffer_.fat16[cluster & 0xFF] : (cacheBuffer_.fat32[cluster & 0x7F] & FAT32MASK);
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
// Store a FAT entry
bool SdVolume::fatPut(uint32_t cluster, uint32_t value) {
uint32_t lba;
// error if reserved cluster
if (cluster < 2) goto FAIL;
if (cluster < 2) return false;
// error if not in FAT
if (cluster > (clusterCount_ + 1)) goto FAIL;
if (cluster > (clusterCount_ + 1)) return false;
if (FAT12_SUPPORT && fatType_ == 12) {
uint16_t index = cluster;
index += index >> 1;
lba = fatStartBlock_ + (index >> 9);
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) goto FAIL;
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) return false;
// mirror second FAT
if (fatCount_ > 1) cacheMirrorBlock_ = lba + blocksPerFat_;
index &= 0x1FF;
@@ -232,7 +214,7 @@ bool SdVolume::fatPut(uint32_t cluster, uint32_t value) {
if (index == 512) {
lba++;
index = 0;
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) goto FAIL;
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) return false;
// mirror second FAT
if (fatCount_ > 1) cacheMirrorBlock_ = lba + blocksPerFat_;
}
@@ -243,51 +225,45 @@ bool SdVolume::fatPut(uint32_t cluster, uint32_t value) {
cacheBuffer_.data[index] = tmp;
return true;
}
if (fatType_ == 16) {
if (fatType_ == 16)
lba = fatStartBlock_ + (cluster >> 8);
}
else if (fatType_ == 32) {
else if (fatType_ == 32)
lba = fatStartBlock_ + (cluster >> 7);
}
else {
goto FAIL;
}
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) goto FAIL;
else
return false;
if (!cacheRawBlock(lba, CACHE_FOR_WRITE)) return false;
// store entry
if (fatType_ == 16) {
if (fatType_ == 16)
cacheBuffer_.fat16[cluster & 0xFF] = value;
}
else {
else
cacheBuffer_.fat32[cluster & 0x7F] = value;
}
// mirror second FAT
if (fatCount_ > 1) cacheMirrorBlock_ = lba + blocksPerFat_;
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
// free a cluster chain
bool SdVolume::freeChain(uint32_t cluster) {
uint32_t next;
// clear free cluster location
allocSearchStart_ = 2;
do {
if (!fatGet(cluster, &next)) goto FAIL;
uint32_t next;
if (!fatGet(cluster, &next)) return false;
// free cluster
if (!fatPut(cluster, 0)) goto FAIL;
if (!fatPut(cluster, 0)) return false;
cluster = next;
} while (!isEOC(cluster));
return true;
FAIL:
return false;
}
//------------------------------------------------------------------------------
/** Volume free space in clusters.
*
* \return Count of free clusters for success or -1 if an error occurs.
@@ -297,34 +273,28 @@ int32_t SdVolume::freeClusterCount() {
uint16_t n;
uint32_t todo = clusterCount_ + 2;
if (fatType_ == 16) {
if (fatType_ == 16)
n = 256;
}
else if (fatType_ == 32) {
else if (fatType_ == 32)
n = 128;
}
else {
// put FAT12 here
else // put FAT12 here
return -1;
}
for (uint32_t lba = fatStartBlock_; todo; todo -= n, lba++) {
if (!cacheRawBlock(lba, CACHE_FOR_READ)) return -1;
NOMORE(n, todo);
if (fatType_ == 16) {
for (uint16_t i = 0; i < n; i++) {
for (uint16_t i = 0; i < n; i++)
if (cacheBuffer_.fat16[i] == 0) free++;
}
}
else {
for (uint16_t i = 0; i < n; i++) {
for (uint16_t i = 0; i < n; i++)
if (cacheBuffer_.fat32[i] == 0) free++;
}
}
}
return free;
}
//------------------------------------------------------------------------------
/** Initialize a FAT volume.
*
* \param[in] dev The SD card where the volume is located.
@@ -334,14 +304,12 @@ int32_t SdVolume::freeClusterCount() {
* a MBR, Master Boot Record, or zero if the device is formatted as
* a super floppy with the FAT boot sector in block zero.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure. Reasons for
* failure include not finding a valid partition, not finding a valid
* \return true for success, false for failure.
* Reasons for failure include not finding a valid partition, not finding a valid
* FAT file system in the specified partition or an I/O error.
*/
bool SdVolume::init(Sd2Card* dev, uint8_t part) {
uint32_t totalBlocks;
uint32_t volumeStartBlock = 0;
uint32_t totalBlocks, volumeStartBlock = 0;
fat32_boot_t* fbs;
sdCard_ = dev;
@@ -354,25 +322,21 @@ bool SdVolume::init(Sd2Card* dev, uint8_t part) {
// if part == 0 assume super floppy with FAT boot sector in block zero
// if part > 0 assume mbr volume with partition table
if (part) {
if (part > 4)goto FAIL;
if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) goto FAIL;
if (part > 4) return false;
if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) return false;
part_t* p = &cacheBuffer_.mbr.part[part - 1];
if ((p->boot & 0x7F) != 0 ||
p->totalSectors < 100 ||
p->firstSector == 0) {
// not a valid partition
goto FAIL;
}
if ((p->boot & 0x7F) != 0 || p->totalSectors < 100 || p->firstSector == 0)
return false; // not a valid partition
volumeStartBlock = p->firstSector;
}
if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) goto FAIL;
if (!cacheRawBlock(volumeStartBlock, CACHE_FOR_READ)) return false;
fbs = &cacheBuffer_.fbs32;
if (fbs->bytesPerSector != 512 ||
fbs->fatCount == 0 ||
fbs->reservedSectorCount == 0 ||
fbs->sectorsPerCluster == 0) {
// not valid FAT volume
goto FAIL;
return false;
}
fatCount_ = fbs->fatCount;
blocksPerCluster_ = fbs->sectorsPerCluster;
@@ -380,7 +344,7 @@ bool SdVolume::init(Sd2Card* dev, uint8_t part) {
clusterSizeShift_ = 0;
while (blocksPerCluster_ != _BV(clusterSizeShift_)) {
// error if not power of 2
if (clusterSizeShift_++ > 7) goto FAIL;
if (clusterSizeShift_++ > 7) return false;
}
blocksPerFat_ = fbs->sectorsPerFat16 ?
fbs->sectorsPerFat16 : fbs->sectorsPerFat32;
@@ -409,18 +373,15 @@ bool SdVolume::init(Sd2Card* dev, uint8_t part) {
// FAT type is determined by cluster count
if (clusterCount_ < 4085) {
fatType_ = 12;
if (!FAT12_SUPPORT) goto FAIL;
if (!FAT12_SUPPORT) return false;
}
else if (clusterCount_ < 65525) {
else if (clusterCount_ < 65525)
fatType_ = 16;
}
else {
rootDirStart_ = fbs->fat32RootCluster;
fatType_ = 32;
}
return true;
FAIL:
return false;
}
#endif // SDSUPPORT