ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source
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
Download patch file Download diff file Expand all files Collapse all files

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);