uint8_t SkipBlockNandFlash_CheckBlock(
const struct SkipBlockNandFlash *skipBlock,
uint16_t block)
{
#if !defined (OP_BOOTSTRAP_on)
uint8_t spare[NandCommon_MAXPAGESPARESIZE];
uint8_t error;
uint8_t badBlockMarker;
const struct NandSpareScheme *scheme;
/* Retrieve model scheme */
scheme = NandFlashModel_GetScheme(MODEL(skipBlock));
/* Read spare area of first page of block */
error = RawNandFlash_ReadPage(RAW(skipBlock), block, 0, 0, spare);
if (error) {
TRACE_ERROR("CheckBlock: Cannot read page #0 of block #%d\n\r", block);
return error;
}
NandSpareScheme_ReadBadBlockMarker(scheme, spare, &badBlockMarker);
if (badBlockMarker != 0xFF) {
return BADBLOCK;
}
/* Read spare area of second page of block */
error = RawNandFlash_ReadPage(RAW(skipBlock), block, 1, 0, spare);
if (error) {
TRACE_ERROR("CheckBlock: Cannot read page #1 of block #%d\n\r", block);
return error;
}
NandSpareScheme_ReadBadBlockMarker(scheme, spare, &badBlockMarker);
if (badBlockMarker != 0xFF) {
return BADBLOCK;
}
#endif
return GOODBLOCK;
}
//------------------------------------------------------------------------------
/// Returns 1 if a nandflash device is virgin (i.e. has never been used as a
/// managed nandflash); otherwise return 0.
/// \param managed Pointer to a ManagedNandFlash instance.
/// \param spare Pointer to allocated spare area (must be assigned)
//------------------------------------------------------------------------------
static unsigned char IsDeviceVirgin(const struct ManagedNandFlash *managed,
unsigned char *spare)
{
struct NandBlockStatus blockStatus;
const struct NandSpareScheme *scheme =
NandFlashModel_GetScheme(MODEL(managed));
unsigned short baseBlock = managed->baseBlock;
unsigned char badBlockMarker;
unsigned char error;
ASSERT(spare, "ManagedNandFlash_IsDeviceVirgin: spare\n\r");
// Read spare area of page #0
error = RawNandFlash_ReadPage(RAW(managed), baseBlock, 0, 0, spare);
ASSERT(!error, "ManagedNandFlash_IsDeviceVirgin: Failed to read page #0\n\r");
// Retrieve bad block marker and block status from spare area
NandSpareScheme_ReadBadBlockMarker(scheme, spare, &badBlockMarker);
NandSpareScheme_ReadExtra(scheme, spare, &blockStatus, 4, 0);
// Check if block is marked as bad
if (badBlockMarker != 0xFF) {
// Device is not virgin, since page #0 is guaranteed to be good
return 0;
}
// If device is not virgin, then block status will be set to either
// FREE, DIRTY or LIVE
else if (blockStatus.status != NandBlockStatus_DEFAULT) {
// Device is not virgin
return 0;
}
return 1;
}
//------------------------------------------------------------------------------
/// Initializes a ManagedNandFlash instance. Scans the device to retrieve or
/// create block status information.
/// \param managed Pointer to a ManagedNandFlash instance.
/// \param model Pointer to the underlying nand chip model. Can be 0.
/// \param commandAddress Address at which commands are sent.
/// \param addressAddress Address at which addresses are sent.
/// \param dataAddress Address at which data is sent.
/// \param pinChipEnable Pin controlling the CE signal of the NandFlash.
/// \param pinReadyBusy Pin used to monitor the ready/busy signal of the Nand.
/// \param baseBlock Base physical block address of managed area, managed 0.
/// \param sizeInBlocks Number of blocks that is managed.
//------------------------------------------------------------------------------
unsigned char ManagedNandFlash_Initialize(
struct ManagedNandFlash *managed,
const struct NandFlashModel *model,
unsigned int commandAddress,
unsigned int addressAddress,
unsigned int dataAddress,
const Pin pinChipEnable,
const Pin pinReadyBusy,
unsigned short baseBlock,
unsigned short sizeInBlocks)
{
unsigned char error;
unsigned char spare[NandCommon_MAXPAGESPARESIZE];
unsigned int numBlocks;
const struct NandSpareScheme *scheme;
unsigned int block, phyBlock;
struct NandBlockStatus blockStatus;
unsigned char badBlockMarker;
unsigned int eraseCount, minEraseCount, maxEraseCount;
TRACE_DEBUG("ManagedNandFlash_Initialize()\n\r");
// Initialize EccNandFlash
error = EccNandFlash_Initialize(ECC(managed),
model,
commandAddress,
addressAddress,
dataAddress,
pinChipEnable,
pinReadyBusy);
if (error) {
return error;
}
// Retrieve model information
numBlocks = NandFlashModel_GetDeviceSizeInBlocks(MODEL(managed));
scheme = NandFlashModel_GetScheme(MODEL(managed));
// Initialize base & size
if (sizeInBlocks == 0) sizeInBlocks = numBlocks;
if (baseBlock > numBlocks) {
baseBlock = 0;
}
else if (baseBlock + sizeInBlocks > numBlocks) {
sizeInBlocks = numBlocks - baseBlock;
}
TRACE_INFO("Managed NF area: %d + %d\n\r", baseBlock, sizeInBlocks);
if (sizeInBlocks > NandCommon_MAXNUMBLOCKS) {
TRACE_ERROR("Out of Maxmized Managed Size: %d > %d\n\r",
sizeInBlocks, NandCommon_MAXNUMBLOCKS);
TRACE_INFO("Change NandCommon_MAXNUMBLOCKS or sizeInBlocks\n\r");
return NandCommon_ERROR_OUTOFBOUNDS;
}
managed->baseBlock = baseBlock;
managed->sizeInBlocks = sizeInBlocks;
// Initialize block statuses
// First, check if device is virgin
if (IsDeviceVirgin(managed, spare)) {
TRACE_WARNING("Device is virgin, doing initial block scanning ...\n\r");
// Perform initial scan of the device area
for (block=0; block < sizeInBlocks; block++) {
phyBlock = baseBlock + block;
// Check if physical block is bad
error = CheckBlock(managed, phyBlock, spare);
if (error == BADBLOCK) {
// Mark block as bad
TRACE_DEBUG("Block #%d is bad\n\r", block);
managed->blockStatuses[block].status = NandBlockStatus_BAD;
}
else if (error == GOODBLOCK) {
// Mark block as free with erase count 0
TRACE_DEBUG("Block #%d is free\n\r", block);
managed->blockStatuses[block].status = NandBlockStatus_FREE;
managed->blockStatuses[block].eraseCount = 0;
// Write status in spare of block first page
error = WriteBlockStatus(managed,
phyBlock,
&(managed->blockStatuses[block]),
spare);
if (error) {
TRACE_ERROR("ManagedNandFlash_Initialize: WR spare\n\r");
return error;
}
}
else {
TRACE_ERROR("ManagedNandFlash_Initialize: Scan device\n\r");
return error;
}
}
}
else {
TRACE_INFO("Managed, retrieving information ...\n\r");
// Retrieve block statuses from their first page spare area
// (find maximum and minimum wear at the same time)
minEraseCount = 0xFFFFFFFF;
maxEraseCount = 0;
for (block=0; block < sizeInBlocks; block++) {
phyBlock = baseBlock + block;
// Read spare of first page
error = RawNandFlash_ReadPage(RAW(managed), phyBlock, 0, 0, spare);
if (error) {
TRACE_ERROR("ManagedNandFlash_Initialize: Read block #%d(%d)\n\r",
block, phyBlock);
}
// Retrieve bad block marker and block status
NandSpareScheme_ReadBadBlockMarker(scheme, spare, &badBlockMarker);
NandSpareScheme_ReadExtra(scheme, spare, &blockStatus, 4, 0);
// If they do not match, block must be bad
if ( (badBlockMarker != 0xFF)
&& (blockStatus.status != NandBlockStatus_BAD)) {
TRACE_DEBUG("Block #%d(%d) is bad\n\r", block, phyBlock);
managed->blockStatuses[block].status = NandBlockStatus_BAD;
}
// Check that block status is not default
// (meaning block is not managed)
else if (blockStatus.status == NandBlockStatus_DEFAULT) {
TRACE_ERROR("Block #%d(%d) is not managed\n\r", block, phyBlock);
return NandCommon_ERROR_NOMAPPING;
}
// Otherwise block status is accurate
else {
TRACE_DEBUG("Block #%03d(%d) : status = %2d | eraseCount = %d\n\r",
block, phyBlock,
blockStatus.status, blockStatus.eraseCount);
managed->blockStatuses[block] = blockStatus;
// Check for min/max erase counts
if (blockStatus.eraseCount < minEraseCount) {
minEraseCount = blockStatus.eraseCount;
}
if (blockStatus.eraseCount > maxEraseCount) {
maxEraseCount = blockStatus.eraseCount;
}
//// Clean block
//// Release LIVE blocks
//if (managed->blockStatuses[block].status == NandBlockStatus_LIVE) {
//
// ManagedNandFlash_ReleaseBlock(managed, block);
//}
//// Erase DIRTY blocks
//if (managed->blockStatuses[block].status == NandBlockStatus_DIRTY) {
//
// ManagedNandFlash_EraseBlock(managed, block);
//}
}
}
// Display erase count information
TRACE_ERROR_WP("|--------|------------|--------|--------|--------|\n\r");
TRACE_ERROR_WP("| Wear | Count | Free | Live | Dirty |\n\r");
TRACE_ERROR_WP("|--------|------------|--------|--------|--------|\n\r");
for (eraseCount=minEraseCount; eraseCount <= maxEraseCount; eraseCount++) {
unsigned int count = 0, live = 0, dirty = 0, free = 0;
for (block=0; block < sizeInBlocks; block++) {
if ((managed->blockStatuses[block].eraseCount == eraseCount)
&& (managed->blockStatuses[block].status != NandBlockStatus_BAD)) {
count++;
switch (managed->blockStatuses[block].status) {
case NandBlockStatus_LIVE: live++; break;
case NandBlockStatus_DIRTY: dirty++; break;
case NandBlockStatus_FREE: free++; break;
}
}
}
if (count > 0) {
TRACE_ERROR_WP("| %4d | %8d | %4d | %4d | %4d |\n\r",
eraseCount, count, free, live, dirty);
}
}
TRACE_ERROR_WP("|--------|------------|--------|--------|--------|\n\r");
}
return 0;
}
