diff options
Diffstat (limited to 'Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c')
| -rw-r--r-- | Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c b/Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c index 7b2a8fa83..a23e21109 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/SCSI.c @@ -114,6 +114,9 @@ bool SCSI_DecodeSCSICommand(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) case SCSI_CMD_READ_10: CommandSuccess = SCSI_Command_ReadWrite_10(MSInterfaceInfo, DATA_READ); break; + case SCSI_CMD_MODE_SENSE_6: + CommandSuccess = SCSI_Command_ModeSense_6(MSInterfaceInfo); + break; case SCSI_CMD_TEST_UNIT_READY: case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL: case SCSI_CMD_VERIFY_10: @@ -282,6 +285,17 @@ static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfa uint32_t BlockAddress; uint16_t TotalBlocks; + /* Check if the disk is write protected or not */ + if ((IsDataRead == DATA_WRITE) && DISK_READ_ONLY) + { + /* Block address is invalid, update SENSE key and return command fail */ + SCSI_SET_SENSE(SCSI_SENSE_KEY_DATA_PROTECT, + SCSI_ASENSE_WRITE_PROTECTED, + SCSI_ASENSEQ_NO_QUALIFIER); + + return false; + } + /* Load in the 32-bit block address (SCSI uses big-endian, so have to reverse the byte order) */ BlockAddress = SwapEndian_32(*(uint32_t*)&MSInterfaceInfo->State.CommandBlock.SCSICommandData[2]); @@ -298,7 +312,7 @@ static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfa return false; } - + /* Determine if the packet is a READ (10) or WRITE (10) command, call appropriate function */ if (IsDataRead == DATA_READ) DataflashManager_ReadBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks); @@ -310,5 +324,26 @@ static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfa return true; } -#endif +/** Command processing for an issued SCSI MODE SENSE (6) command. This command returns various informational pages about + * the SCSI device, as well as the device's Write Protect status. + * + * \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with + * + * \return Boolean true if the command completed successfully, false otherwise. + */ +static bool SCSI_Command_ModeSense_6(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) +{ + /* Send an empty header response with the Write Protect flag status */ + Endpoint_Write_Byte(0x00); + Endpoint_Write_Byte(0x00); + Endpoint_Write_Byte(DISK_READ_ONLY ? 0x80 : 0x00); + Endpoint_Write_Byte(0x00); + Endpoint_ClearIN(); + + /* Update the bytes transferred counter and succeed the command */ + MSInterfaceInfo->State.CommandBlock.DataTransferLength -= 4; + + return true; +} +#endif
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