X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d11ed10c5314c44dc01c06954d1d73d4894cbff8..a9abe1fdea5ccf67aaccab6fdde300d6fcf2d15a:/Projects/Webserver/Lib/DataflashManager.c diff --git a/Projects/Webserver/Lib/DataflashManager.c b/Projects/Webserver/Lib/DataflashManager.c index 1de866ede..8bf86f47f 100644 --- a/Projects/Webserver/Lib/DataflashManager.c +++ b/Projects/Webserver/Lib/DataflashManager.c @@ -1,525 +1,534 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2010. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Functions to manage the physical dataflash media, including reading and writing of - * blocks of data. These functions are called by the SCSI layer when data must be stored - * or retrieved to/from the physical storage media. If a different media is used (such - * as a SD card or EEPROM), functions similar to these will need to be generated. - */ - -#define INCLUDE_FROM_DATAFLASHMANAGER_C -#include "DataflashManager.h" - -/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board dataflash IC(s), from - * the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes - * them to the dataflash in Dataflash page sized blocks. - * - * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state - * \param[in] BlockAddress Data block starting address for the write sequence - * \param[in] TotalBlocks Number of blocks of data to write - */ -void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* MSInterfaceInfo, const uint32_t BlockAddress, uint16_t TotalBlocks) -{ - uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); - uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); - uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); - bool UsingSecondBuffer = false; - - /* Select the correct starting Dataflash IC for the block requested */ - Dataflash_SelectChipFromPage(CurrDFPage); - -#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) - /* Copy selected dataflash's current page contents to the dataflash buffer */ - Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_WaitWhileBusy(); -#endif - - /* Send the dataflash buffer write command */ - Dataflash_SendByte(DF_CMD_BUFF1WRITE); - Dataflash_SendAddressBytes(0, CurrDFPageByte); - - /* Wait until endpoint is ready before continuing */ - if (Endpoint_WaitUntilReady()) - return; - - while (TotalBlocks) - { - uint8_t BytesInBlockDiv16 = 0; - - /* Write an endpoint packet sized data block to the dataflash */ - while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) - { - /* Check if the endpoint is currently empty */ - if (!(Endpoint_IsReadWriteAllowed())) - { - /* Clear the current endpoint bank */ - Endpoint_ClearOUT(); - - /* Wait until the host has sent another packet */ - if (Endpoint_WaitUntilReady()) - return; - } - - /* Check if end of dataflash page reached */ - if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Write the dataflash buffer contents back to the dataflash page */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); - Dataflash_SendAddressBytes(CurrDFPage, 0); - - /* Reset the dataflash buffer counter, increment the page counter */ - CurrDFPageByteDiv16 = 0; - CurrDFPage++; - - /* Once all the dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */ - if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS)) - UsingSecondBuffer = !(UsingSecondBuffer); - - /* Select the next dataflash chip based on the new dataflash page index */ - Dataflash_SelectChipFromPage(CurrDFPage); - -#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) - /* If less than one dataflash page remaining, copy over the existing page to preserve trailing data */ - if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Copy selected dataflash's current page contents to the dataflash buffer */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_WaitWhileBusy(); - } -#endif - - /* Send the dataflash buffer write command */ - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE); - Dataflash_SendAddressBytes(0, 0); - } - - /* Write one 16-byte chunk of data to the dataflash */ - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - Dataflash_SendByte(Endpoint_Read_Byte()); - - /* Increment the dataflash page 16 byte block counter */ - CurrDFPageByteDiv16++; - - /* Increment the block 16 byte block counter */ - BytesInBlockDiv16++; - - /* Check if the current command is being aborted by the host */ - if (MSInterfaceInfo->State.IsMassStoreReset) - return; - } - - /* Decrement the blocks remaining counter and reset the sub block counter */ - TotalBlocks--; - } - - /* Write the dataflash buffer contents back to the dataflash page */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); - Dataflash_SendAddressBytes(CurrDFPage, 0x00); - Dataflash_WaitWhileBusy(); - - /* If the endpoint is empty, clear it ready for the next packet from the host */ - if (!(Endpoint_IsReadWriteAllowed())) - Endpoint_ClearOUT(); - - /* Deselect all dataflash chips */ - Dataflash_DeselectChip(); -} - -/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board dataflash IC(s), into - * the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash - * and writes them in OS sized blocks to the endpoint. - * - * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state - * \param[in] BlockAddress Data block starting address for the read sequence - * \param[in] TotalBlocks Number of blocks of data to read - */ -void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* MSInterfaceInfo, const uint32_t BlockAddress, uint16_t TotalBlocks) -{ - uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); - uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); - uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); - - /* Select the correct starting Dataflash IC for the block requested */ - Dataflash_SelectChipFromPage(CurrDFPage); - - /* Send the dataflash main memory page read command */ - Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); - Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - - /* Wait until endpoint is ready before continuing */ - if (Endpoint_WaitUntilReady()) - return; - - while (TotalBlocks) - { - uint8_t BytesInBlockDiv16 = 0; - - /* Write an endpoint packet sized data block to the dataflash */ - while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) - { - /* Check if the endpoint is currently full */ - if (!(Endpoint_IsReadWriteAllowed())) - { - /* Clear the endpoint bank to send its contents to the host */ - Endpoint_ClearIN(); - - /* Wait until the endpoint is ready for more data */ - if (Endpoint_WaitUntilReady()) - return; - } - - /* Check if end of dataflash page reached */ - if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Reset the dataflash buffer counter, increment the page counter */ - CurrDFPageByteDiv16 = 0; - CurrDFPage++; - - /* Select the next dataflash chip based on the new dataflash page index */ - Dataflash_SelectChipFromPage(CurrDFPage); - - /* Send the dataflash main memory page read command */ - Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - } - - /* Read one 16-byte chunk of data from the dataflash */ - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - Endpoint_Write_Byte(Dataflash_ReceiveByte()); - - /* Increment the dataflash page 16 byte block counter */ - CurrDFPageByteDiv16++; - - /* Increment the block 16 byte block counter */ - BytesInBlockDiv16++; - - /* Check if the current command is being aborted by the host */ - if (MSInterfaceInfo->State.IsMassStoreReset) - return; - } - - /* Decrement the blocks remaining counter */ - TotalBlocks--; - } - - /* If the endpoint is full, send its contents to the host */ - if (!(Endpoint_IsReadWriteAllowed())) - Endpoint_ClearIN(); - - /* Deselect all dataflash chips */ - Dataflash_DeselectChip(); -} - -/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board dataflash IC(s), from - * the a given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the - * dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the - * dataflash. - * - * \param[in] BlockAddress Data block starting address for the write sequence - * \param[in] TotalBlocks Number of blocks of data to write - * \param[in] BufferPtr Pointer to the data source RAM buffer - */ -void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress, uint16_t TotalBlocks, const uint8_t* BufferPtr) -{ - uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); - uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); - uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); - bool UsingSecondBuffer = false; - - /* Select the correct starting Dataflash IC for the block requested */ - Dataflash_SelectChipFromPage(CurrDFPage); - -#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) - /* Copy selected dataflash's current page contents to the dataflash buffer */ - Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_WaitWhileBusy(); -#endif - - /* Send the dataflash buffer write command */ - Dataflash_SendByte(DF_CMD_BUFF1WRITE); - Dataflash_SendAddressBytes(0, CurrDFPageByte); - - while (TotalBlocks) - { - uint8_t BytesInBlockDiv16 = 0; - - /* Write an endpoint packet sized data block to the dataflash */ - while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) - { - /* Check if end of dataflash page reached */ - if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Write the dataflash buffer contents back to the dataflash page */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); - Dataflash_SendAddressBytes(CurrDFPage, 0); - - /* Reset the dataflash buffer counter, increment the page counter */ - CurrDFPageByteDiv16 = 0; - CurrDFPage++; - - /* Once all the dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */ - if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS)) - UsingSecondBuffer = !(UsingSecondBuffer); - - /* Select the next dataflash chip based on the new dataflash page index */ - Dataflash_SelectChipFromPage(CurrDFPage); - -#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) - /* If less than one dataflash page remaining, copy over the existing page to preserve trailing data */ - if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Copy selected dataflash's current page contents to the dataflash buffer */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_WaitWhileBusy(); - } -#endif - - /* Send the dataflash buffer write command */ - Dataflash_ToggleSelectedChipCS(); - Dataflash_SendByte(DF_CMD_BUFF1WRITE); - Dataflash_SendAddressBytes(0, 0); - } - - /* Write one 16-byte chunk of data to the dataflash */ - for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++) - Dataflash_SendByte(*(BufferPtr++)); - - /* Increment the dataflash page 16 byte block counter */ - CurrDFPageByteDiv16++; - - /* Increment the block 16 byte block counter */ - BytesInBlockDiv16++; - } - - /* Decrement the blocks remaining counter and reset the sub block counter */ - TotalBlocks--; - } - - /* Write the dataflash buffer contents back to the dataflash page */ - Dataflash_WaitWhileBusy(); - Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); - Dataflash_SendAddressBytes(CurrDFPage, 0x00); - Dataflash_WaitWhileBusy(); - - /* Deselect all dataflash chips */ - Dataflash_DeselectChip(); -} - -/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board dataflash IC(s), into - * the a preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash - * and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read - * the files stored on the dataflash. - * - * \param[in] BlockAddress Data block starting address for the read sequence - * \param[in] TotalBlocks Number of blocks of data to read - * \param[out] BufferPtr Pointer to the data destination RAM buffer - */ -void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress, uint16_t TotalBlocks, uint8_t* BufferPtr) -{ - uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); - uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); - uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); - - /* Select the correct starting Dataflash IC for the block requested */ - Dataflash_SelectChipFromPage(CurrDFPage); - - /* Send the dataflash main memory page read command */ - Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); - Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - - while (TotalBlocks) - { - uint8_t BytesInBlockDiv16 = 0; - - /* Write an endpoint packet sized data block to the dataflash */ - while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) - { - /* Check if end of dataflash page reached */ - if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) - { - /* Reset the dataflash buffer counter, increment the page counter */ - CurrDFPageByteDiv16 = 0; - CurrDFPage++; - - /* Select the next dataflash chip based on the new dataflash page index */ - Dataflash_SelectChipFromPage(CurrDFPage); - - /* Send the dataflash main memory page read command */ - Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); - Dataflash_SendAddressBytes(CurrDFPage, 0); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - Dataflash_SendByte(0x00); - } - - /* Read one 16-byte chunk of data from the dataflash */ - for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++) - *(BufferPtr++) = Dataflash_ReceiveByte(); - - /* Increment the dataflash page 16 byte block counter */ - CurrDFPageByteDiv16++; - - /* Increment the block 16 byte block counter */ - BytesInBlockDiv16++; - } - - /* Decrement the blocks remaining counter */ - TotalBlocks--; - } - - /* Deselect all dataflash chips */ - Dataflash_DeselectChip(); -} - -/** Disables the dataflash memory write protection bits on the board Dataflash ICs, if enabled. */ -void DataflashManager_ResetDataflashProtections(void) -{ - /* Select first dataflash chip, send the read status register command */ - Dataflash_SelectChip(DATAFLASH_CHIP1); - Dataflash_SendByte(DF_CMD_GETSTATUS); - - /* Check if sector protection is enabled */ - if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON) - { - Dataflash_ToggleSelectedChipCS(); - - /* Send the commands to disable sector protection */ - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]); - } - - /* Select second dataflash chip (if present on selected board), send read status register command */ - #if (DATAFLASH_TOTALCHIPS == 2) - Dataflash_SelectChip(DATAFLASH_CHIP2); - Dataflash_SendByte(DF_CMD_GETSTATUS); - - /* Check if sector protection is enabled */ - if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON) - { - Dataflash_ToggleSelectedChipCS(); - - /* Send the commands to disable sector protection */ - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]); - Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]); - } - #endif - - /* Deselect current dataflash chip */ - Dataflash_DeselectChip(); -} - -/** Performs a simple test on the attached Dataflash IC(s) to ensure that they are working. - * - * \return Boolean true if all media chips are working, false otherwise - */ -bool DataflashManager_CheckDataflashOperation(void) -{ - uint8_t ReturnByte; - - /* Test first Dataflash IC is present and responding to commands */ - Dataflash_SelectChip(DATAFLASH_CHIP1); - Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO); - ReturnByte = Dataflash_ReceiveByte(); - Dataflash_DeselectChip(); - - /* If returned data is invalid, fail the command */ - if (ReturnByte != DF_MANUFACTURER_ATMEL) - return false; - - #if (DATAFLASH_TOTALCHIPS == 2) - /* Test second Dataflash IC is present and responding to commands */ - Dataflash_SelectChip(DATAFLASH_CHIP2); - Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO); - ReturnByte = Dataflash_ReceiveByte(); - Dataflash_DeselectChip(); - - /* If returned data is invalid, fail the command */ - if (ReturnByte != DF_MANUFACTURER_ATMEL) - return false; - #endif - - return true; -} +/* + LUFA Library + Copyright (C) Dean Camera, 2012. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * Functions to manage the physical Dataflash media, including reading and writing of + * blocks of data. These functions are called by the SCSI layer when data must be stored + * or retrieved to/from the physical storage media. If a different media is used (such + * as a SD card or EEPROM), functions similar to these will need to be generated. + */ + +#define INCLUDE_FROM_DATAFLASHMANAGER_C +#include "DataflashManager.h" + +/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from + * the pre-selected data OUT endpoint. This routine reads in OS sized blocks from the endpoint and writes + * them to the Dataflash in Dataflash page sized blocks. + * + * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state + * \param[in] BlockAddress Data block starting address for the write sequence + * \param[in] TotalBlocks Number of blocks of data to write + */ +void DataflashManager_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo, + const uint32_t BlockAddress, + uint16_t TotalBlocks) +{ + uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); + uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); + uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); + bool UsingSecondBuffer = false; + + /* Select the correct starting Dataflash IC for the block requested */ + Dataflash_SelectChipFromPage(CurrDFPage); + +#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) + /* Copy selected dataflash's current page contents to the Dataflash buffer */ + Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_WaitWhileBusy(); +#endif + + /* Send the Dataflash buffer write command */ + Dataflash_SendByte(DF_CMD_BUFF1WRITE); + Dataflash_SendAddressBytes(0, CurrDFPageByte); + + /* Wait until endpoint is ready before continuing */ + if (Endpoint_WaitUntilReady()) + return; + + while (TotalBlocks) + { + uint8_t BytesInBlockDiv16 = 0; + + /* Write an endpoint packet sized data block to the Dataflash */ + while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) + { + /* Check if the endpoint is currently empty */ + if (!(Endpoint_IsReadWriteAllowed())) + { + /* Clear the current endpoint bank */ + Endpoint_ClearOUT(); + + /* Wait until the host has sent another packet */ + if (Endpoint_WaitUntilReady()) + return; + } + + /* Check if end of Dataflash page reached */ + if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Write the Dataflash buffer contents back to the Dataflash page */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); + Dataflash_SendAddressBytes(CurrDFPage, 0); + + /* Reset the Dataflash buffer counter, increment the page counter */ + CurrDFPageByteDiv16 = 0; + CurrDFPage++; + + /* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */ + if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS)) + UsingSecondBuffer = !(UsingSecondBuffer); + + /* Select the next Dataflash chip based on the new Dataflash page index */ + Dataflash_SelectChipFromPage(CurrDFPage); + +#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) + /* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */ + if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Copy selected dataflash's current page contents to the Dataflash buffer */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_WaitWhileBusy(); + } +#endif + + /* Send the Dataflash buffer write command */ + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE); + Dataflash_SendAddressBytes(0, 0); + } + + /* Write one 16-byte chunk of data to the Dataflash */ + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + Dataflash_SendByte(Endpoint_Read_8()); + + /* Increment the Dataflash page 16 byte block counter */ + CurrDFPageByteDiv16++; + + /* Increment the block 16 byte block counter */ + BytesInBlockDiv16++; + + /* Check if the current command is being aborted by the host */ + if (MSInterfaceInfo->State.IsMassStoreReset) + return; + } + + /* Decrement the blocks remaining counter */ + TotalBlocks--; + } + + /* Write the Dataflash buffer contents back to the Dataflash page */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); + Dataflash_SendAddressBytes(CurrDFPage, 0x00); + Dataflash_WaitWhileBusy(); + + /* If the endpoint is empty, clear it ready for the next packet from the host */ + if (!(Endpoint_IsReadWriteAllowed())) + Endpoint_ClearOUT(); + + /* Deselect all Dataflash chips */ + Dataflash_DeselectChip(); +} + +/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into + * the pre-selected data IN endpoint. This routine reads in Dataflash page sized blocks from the Dataflash + * and writes them in OS sized blocks to the endpoint. + * + * \param[in] MSInterfaceInfo Pointer to a structure containing a Mass Storage Class configuration and state + * \param[in] BlockAddress Data block starting address for the read sequence + * \param[in] TotalBlocks Number of blocks of data to read + */ +void DataflashManager_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo, + const uint32_t BlockAddress, + uint16_t TotalBlocks) +{ + uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); + uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); + uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); + + /* Select the correct starting Dataflash IC for the block requested */ + Dataflash_SelectChipFromPage(CurrDFPage); + + /* Send the Dataflash main memory page read command */ + Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); + Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + + /* Wait until endpoint is ready before continuing */ + if (Endpoint_WaitUntilReady()) + return; + + while (TotalBlocks) + { + uint8_t BytesInBlockDiv16 = 0; + + /* Write an endpoint packet sized data block to the Dataflash */ + while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) + { + /* Check if the endpoint is currently full */ + if (!(Endpoint_IsReadWriteAllowed())) + { + /* Clear the endpoint bank to send its contents to the host */ + Endpoint_ClearIN(); + + /* Wait until the endpoint is ready for more data */ + if (Endpoint_WaitUntilReady()) + return; + } + + /* Check if end of Dataflash page reached */ + if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Reset the Dataflash buffer counter, increment the page counter */ + CurrDFPageByteDiv16 = 0; + CurrDFPage++; + + /* Select the next Dataflash chip based on the new Dataflash page index */ + Dataflash_SelectChipFromPage(CurrDFPage); + + /* Send the Dataflash main memory page read command */ + Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + } + + /* Read one 16-byte chunk of data from the Dataflash */ + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + Endpoint_Write_8(Dataflash_ReceiveByte()); + + /* Increment the Dataflash page 16 byte block counter */ + CurrDFPageByteDiv16++; + + /* Increment the block 16 byte block counter */ + BytesInBlockDiv16++; + + /* Check if the current command is being aborted by the host */ + if (MSInterfaceInfo->State.IsMassStoreReset) + return; + } + + /* Decrement the blocks remaining counter */ + TotalBlocks--; + } + + /* If the endpoint is full, send its contents to the host */ + if (!(Endpoint_IsReadWriteAllowed())) + Endpoint_ClearIN(); + + /* Deselect all Dataflash chips */ + Dataflash_DeselectChip(); +} + +/** Writes blocks (OS blocks, not Dataflash pages) to the storage medium, the board Dataflash IC(s), from + * the given RAM buffer. This routine reads in OS sized blocks from the buffer and writes them to the + * Dataflash in Dataflash page sized blocks. This can be linked to FAT libraries to write files to the + * Dataflash. + * + * \param[in] BlockAddress Data block starting address for the write sequence + * \param[in] TotalBlocks Number of blocks of data to write + * \param[in] BufferPtr Pointer to the data source RAM buffer + */ +void DataflashManager_WriteBlocks_RAM(const uint32_t BlockAddress, + uint16_t TotalBlocks, + const uint8_t* BufferPtr) +{ + uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); + uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); + uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); + bool UsingSecondBuffer = false; + + /* Select the correct starting Dataflash IC for the block requested */ + Dataflash_SelectChipFromPage(CurrDFPage); + +#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) + /* Copy selected dataflash's current page contents to the Dataflash buffer */ + Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF1); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_WaitWhileBusy(); +#endif + + /* Send the Dataflash buffer write command */ + Dataflash_SendByte(DF_CMD_BUFF1WRITE); + Dataflash_SendAddressBytes(0, CurrDFPageByte); + + while (TotalBlocks) + { + uint8_t BytesInBlockDiv16 = 0; + + /* Write an endpoint packet sized data block to the Dataflash */ + while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) + { + /* Check if end of Dataflash page reached */ + if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Write the Dataflash buffer contents back to the Dataflash page */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); + Dataflash_SendAddressBytes(CurrDFPage, 0); + + /* Reset the Dataflash buffer counter, increment the page counter */ + CurrDFPageByteDiv16 = 0; + CurrDFPage++; + + /* Once all the Dataflash ICs have had their first buffers filled, switch buffers to maintain throughput */ + if (Dataflash_GetSelectedChip() == DATAFLASH_CHIP_MASK(DATAFLASH_TOTALCHIPS)) + UsingSecondBuffer = !(UsingSecondBuffer); + + /* Select the next Dataflash chip based on the new Dataflash page index */ + Dataflash_SelectChipFromPage(CurrDFPage); + +#if (DATAFLASH_PAGE_SIZE > VIRTUAL_MEMORY_BLOCK_SIZE) + /* If less than one Dataflash page remaining, copy over the existing page to preserve trailing data */ + if ((TotalBlocks * (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) < (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Copy selected dataflash's current page contents to the Dataflash buffer */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_MAINMEMTOBUFF2 : DF_CMD_MAINMEMTOBUFF1); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_WaitWhileBusy(); + } +#endif + + /* Send the Dataflash buffer write command */ + Dataflash_ToggleSelectedChipCS(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2WRITE : DF_CMD_BUFF1WRITE); + Dataflash_SendAddressBytes(0, 0); + } + + /* Write one 16-byte chunk of data to the Dataflash */ + for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++) + Dataflash_SendByte(*(BufferPtr++)); + + /* Increment the Dataflash page 16 byte block counter */ + CurrDFPageByteDiv16++; + + /* Increment the block 16 byte block counter */ + BytesInBlockDiv16++; + } + + /* Decrement the blocks remaining counter */ + TotalBlocks--; + } + + /* Write the Dataflash buffer contents back to the Dataflash page */ + Dataflash_WaitWhileBusy(); + Dataflash_SendByte(UsingSecondBuffer ? DF_CMD_BUFF2TOMAINMEMWITHERASE : DF_CMD_BUFF1TOMAINMEMWITHERASE); + Dataflash_SendAddressBytes(CurrDFPage, 0x00); + Dataflash_WaitWhileBusy(); + + /* Deselect all Dataflash chips */ + Dataflash_DeselectChip(); +} + +/** Reads blocks (OS blocks, not Dataflash pages) from the storage medium, the board Dataflash IC(s), into + * the preallocated RAM buffer. This routine reads in Dataflash page sized blocks from the Dataflash + * and writes them in OS sized blocks to the given buffer. This can be linked to FAT libraries to read + * the files stored on the Dataflash. + * + * \param[in] BlockAddress Data block starting address for the read sequence + * \param[in] TotalBlocks Number of blocks of data to read + * \param[out] BufferPtr Pointer to the data destination RAM buffer + */ +void DataflashManager_ReadBlocks_RAM(const uint32_t BlockAddress, + uint16_t TotalBlocks, + uint8_t* BufferPtr) +{ + uint16_t CurrDFPage = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) / DATAFLASH_PAGE_SIZE); + uint16_t CurrDFPageByte = ((BlockAddress * VIRTUAL_MEMORY_BLOCK_SIZE) % DATAFLASH_PAGE_SIZE); + uint8_t CurrDFPageByteDiv16 = (CurrDFPageByte >> 4); + + /* Select the correct starting Dataflash IC for the block requested */ + Dataflash_SelectChipFromPage(CurrDFPage); + + /* Send the Dataflash main memory page read command */ + Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); + Dataflash_SendAddressBytes(CurrDFPage, CurrDFPageByte); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + + while (TotalBlocks) + { + uint8_t BytesInBlockDiv16 = 0; + + /* Write an endpoint packet sized data block to the Dataflash */ + while (BytesInBlockDiv16 < (VIRTUAL_MEMORY_BLOCK_SIZE >> 4)) + { + /* Check if end of Dataflash page reached */ + if (CurrDFPageByteDiv16 == (DATAFLASH_PAGE_SIZE >> 4)) + { + /* Reset the Dataflash buffer counter, increment the page counter */ + CurrDFPageByteDiv16 = 0; + CurrDFPage++; + + /* Select the next Dataflash chip based on the new Dataflash page index */ + Dataflash_SelectChipFromPage(CurrDFPage); + + /* Send the Dataflash main memory page read command */ + Dataflash_SendByte(DF_CMD_MAINMEMPAGEREAD); + Dataflash_SendAddressBytes(CurrDFPage, 0); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + Dataflash_SendByte(0x00); + } + + /* Read one 16-byte chunk of data from the Dataflash */ + for (uint8_t ByteNum = 0; ByteNum < 16; ByteNum++) + *(BufferPtr++) = Dataflash_ReceiveByte(); + + /* Increment the Dataflash page 16 byte block counter */ + CurrDFPageByteDiv16++; + + /* Increment the block 16 byte block counter */ + BytesInBlockDiv16++; + } + + /* Decrement the blocks remaining counter */ + TotalBlocks--; + } + + /* Deselect all Dataflash chips */ + Dataflash_DeselectChip(); +} + +/** Disables the Dataflash memory write protection bits on the board Dataflash ICs, if enabled. */ +void DataflashManager_ResetDataflashProtections(void) +{ + /* Select first Dataflash chip, send the read status register command */ + Dataflash_SelectChip(DATAFLASH_CHIP1); + Dataflash_SendByte(DF_CMD_GETSTATUS); + + /* Check if sector protection is enabled */ + if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON) + { + Dataflash_ToggleSelectedChipCS(); + + /* Send the commands to disable sector protection */ + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]); + } + + /* Select second Dataflash chip (if present on selected board), send read status register command */ + #if (DATAFLASH_TOTALCHIPS == 2) + Dataflash_SelectChip(DATAFLASH_CHIP2); + Dataflash_SendByte(DF_CMD_GETSTATUS); + + /* Check if sector protection is enabled */ + if (Dataflash_ReceiveByte() & DF_STATUS_SECTORPROTECTION_ON) + { + Dataflash_ToggleSelectedChipCS(); + + /* Send the commands to disable sector protection */ + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[0]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[1]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[2]); + Dataflash_SendByte(DF_CMD_SECTORPROTECTIONOFF[3]); + } + #endif + + /* Deselect current Dataflash chip */ + Dataflash_DeselectChip(); +} + +/** Performs a simple test on the attached Dataflash IC(s) to ensure that they are working. + * + * \return Boolean true if all media chips are working, false otherwise + */ +bool DataflashManager_CheckDataflashOperation(void) +{ + uint8_t ReturnByte; + + /* Test first Dataflash IC is present and responding to commands */ + Dataflash_SelectChip(DATAFLASH_CHIP1); + Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO); + ReturnByte = Dataflash_ReceiveByte(); + Dataflash_DeselectChip(); + + /* If returned data is invalid, fail the command */ + if (ReturnByte != DF_MANUFACTURER_ATMEL) + return false; + + #if (DATAFLASH_TOTALCHIPS == 2) + /* Test second Dataflash IC is present and responding to commands */ + Dataflash_SelectChip(DATAFLASH_CHIP2); + Dataflash_SendByte(DF_CMD_READMANUFACTURERDEVICEINFO); + ReturnByte = Dataflash_ReceiveByte(); + Dataflash_DeselectChip(); + + /* If returned data is invalid, fail the command */ + if (ReturnByte != DF_MANUFACTURER_ATMEL) + return false; + #endif + + return true; +} +