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Significantly reduce the size of the Mass Storage class bootloader, by removing dependencies on large LUFA internal functions.

This commit is contained in:
Dean Camera 2013-03-20 19:02:29 +00:00
parent 6e8642185a
commit 199cf8f183
4 changed files with 9 additions and 20 deletions
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2
Bootloaders/MassStorage/BootloaderAPITable.S
View File

@ -29,7 +29,6 @@
*/
#if AUX_BOOT_SECTION_SIZE > 0
#warning Using a AUX bootloader section in addition to the defined bootloader space (see documentation).
; Trampoline to jump over the AUX bootloader section to the start of the bootloader,
@ -38,7 +37,6 @@
.global Boot_AUX_Trampoline
Boot_AUX_Trampoline:
jmp BOOT_START_ADDR
#endif
; Trampolines to actual API implementations if the target address is outside the

13
Bootloaders/MassStorage/Lib/SCSI.c
View File

@ -212,11 +212,8 @@ static bool SCSI_Command_Request_Sense(USB_ClassInfo_MS_Device_t* const MSInterf
*/
static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{
uint32_t LastBlockAddressInLUN = (LUN_MEDIA_BLOCKS - 1);
uint32_t MediaBlockSize = SECTOR_SIZE_BYTES;
Endpoint_Write_Stream_BE(&LastBlockAddressInLUN, sizeof(LastBlockAddressInLUN), NULL);
Endpoint_Write_Stream_BE(&MediaBlockSize, sizeof(MediaBlockSize), NULL);
Endpoint_Write_32_BE(LUN_MEDIA_BLOCKS - 1);
Endpoint_Write_32_BE(SECTOR_SIZE_BYTES);
Endpoint_ClearIN();
/* Succeed the command and update the bytes transferred counter */
@ -237,7 +234,7 @@ static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInt
static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
const bool IsDataRead)
{
uint32_t BlockAddress;
uint16_t BlockAddress;
uint16_t TotalBlocks;
/* Load in the 32-bit block address (SCSI uses big-endian, so have to reverse the byte order) */
@ -259,9 +256,9 @@ static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfa
/* Determine if the packet is a READ (10) or WRITE (10) command, call appropriate function */
if (IsDataRead == DATA_READ)
VirtualFAT_ReadBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks);
VirtualFAT_ReadBlocks(BlockAddress, TotalBlocks);
else
VirtualFAT_WriteBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks);
VirtualFAT_WriteBlocks(BlockAddress, TotalBlocks);
/* Update the bytes transferred counter and succeed the command */
MSInterfaceInfo->State.CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * SECTOR_SIZE_BYTES);

8
Bootloaders/MassStorage/Lib/VirtualFAT.c
View File

@ -245,12 +245,10 @@ static void ReadVirtualBlock(const uint16_t BlockNumber)
/** Writes a number of blocks to the virtual FAT file system, from the host
* PC via the USB Mass Storage interface.
*
* \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 VirtualFAT_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
const uint32_t BlockAddress,
void VirtualFAT_WriteBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks)
{
uint16_t CurrentBlock = (uint16_t)BlockAddress;
@ -264,12 +262,10 @@ void VirtualFAT_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
/** Reads a number of blocks from the virtual FAT file system, and sends them
* to the host PC via the USB Mass Storage interface.
*
* \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 VirtualFAT_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
const uint32_t BlockAddress,
void VirtualFAT_ReadBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks)
{
uint16_t CurrentBlock = (uint16_t)BlockAddress;

6
Bootloaders/MassStorage/Lib/VirtualFAT.h
View File

@ -151,11 +151,9 @@
static void ReadVirtualBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
#endif
void VirtualFAT_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
const uint32_t BlockAddress,
void VirtualFAT_WriteBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks) AUX_BOOT_SECTION;
void VirtualFAT_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
const uint32_t BlockAddress,
void VirtualFAT_ReadBlocks(const uint16_t BlockAddress,
uint16_t TotalBlocks) AUX_BOOT_SECTION;
#endif