/** Main routine to process the SCSI command located in the Command Block Wrapper read from the host. This dispatches\r
* to the appropriate SCSI command handling routine if the issued command is supported by the device, else it returns\r
* a command failure due to a ILLEGAL REQUEST.\r
+ *\r
+ * \return Boolean true if the command completed sucessfully, false otherwise\r
*/\r
-void SCSI_DecodeSCSICommand(void)\r
+bool SCSI_DecodeSCSICommand(void)\r
{\r
- bool CommandSuccess = false;\r
+ /* Set initial sense data, before the requested command is processed */\r
+ SCSI_SET_SENSE(SCSI_SENSE_KEY_GOOD,\r
+ SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,\r
+ SCSI_ASENSEQ_NO_QUALIFIER);\r
\r
/* Run the appropriate SCSI command hander function based on the passed command */\r
switch (CommandBlock.SCSICommandData[0])\r
{\r
case SCSI_CMD_INQUIRY:\r
- CommandSuccess = SCSI_Command_Inquiry(); \r
+ SCSI_Command_Inquiry(); \r
break;\r
case SCSI_CMD_REQUEST_SENSE:\r
- CommandSuccess = SCSI_Command_Request_Sense();\r
+ SCSI_Command_Request_Sense();\r
break;\r
case SCSI_CMD_READ_CAPACITY_10:\r
- CommandSuccess = SCSI_Command_Read_Capacity_10(); \r
+ SCSI_Command_Read_Capacity_10(); \r
break;\r
case SCSI_CMD_SEND_DIAGNOSTIC:\r
- CommandSuccess = SCSI_Command_Send_Diagnostic();\r
+ SCSI_Command_Send_Diagnostic();\r
break;\r
case SCSI_CMD_WRITE_10:\r
- CommandSuccess = SCSI_Command_ReadWrite_10(DATA_WRITE);\r
+ SCSI_Command_ReadWrite_10(DATA_WRITE);\r
break;\r
case SCSI_CMD_READ_10:\r
- CommandSuccess = SCSI_Command_ReadWrite_10(DATA_READ);\r
+ SCSI_Command_ReadWrite_10(DATA_READ);\r
break;\r
case SCSI_CMD_TEST_UNIT_READY:\r
case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:\r
case SCSI_CMD_VERIFY_10:\r
/* These commands should just succeed, no handling required */\r
- CommandSuccess = true;\r
CommandBlock.DataTransferLength = 0;\r
break;\r
default:\r
break;\r
}\r
\r
- /* Check if command was successfully processed */\r
- if (CommandSuccess)\r
- {\r
- /* Command succeeded - set the CSW status and update the SENSE key */\r
- CommandStatus.Status = Command_Pass;\r
- \r
- SCSI_SET_SENSE(SCSI_SENSE_KEY_GOOD,\r
- SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,\r
- SCSI_ASENSEQ_NO_QUALIFIER); \r
- }\r
- else\r
- {\r
- /* Command failed - set the CSW status - failed command function updates the SENSE key */\r
- CommandStatus.Status = Command_Fail;\r
- }\r
+ return (SenseData.SenseKey == SCSI_SENSE_KEY_GOOD);\r
}\r
\r
/** Command processing for an issued SCSI INQUIRY command. This command returns information about the device's features\r
* and capabilities to the host.\r
- *\r
- * \return Boolean true if the command completed successfully, false otherwise.\r
*/\r
-static bool SCSI_Command_Inquiry(void)\r
+static void SCSI_Command_Inquiry(void)\r
{\r
uint16_t AllocationLength = (((uint16_t)CommandBlock.SCSICommandData[3] << 8) |\r
CommandBlock.SCSICommandData[4]);\r
SCSI_ASENSE_INVALID_FIELD_IN_CDB,\r
SCSI_ASENSEQ_NO_QUALIFIER);\r
\r
- return false;\r
+ return;\r
}\r
\r
/* Write the INQUIRY data to the endpoint */\r
\r
/* Succeed the command and update the bytes transferred counter */\r
CommandBlock.DataTransferLength -= BytesTransferred;\r
- \r
- return true;\r
}\r
\r
/** Command processing for an issued SCSI REQUEST SENSE command. This command returns information about the last issued command,\r
* including the error code and additional error information so that the host can determine why a command failed to complete.\r
- *\r
- * \return Boolean true if the command completed successfully, false otherwise.\r
*/\r
-static bool SCSI_Command_Request_Sense(void)\r
+static void SCSI_Command_Request_Sense(void)\r
{\r
uint8_t AllocationLength = CommandBlock.SCSICommandData[4];\r
uint8_t BytesTransferred = (AllocationLength < sizeof(SenseData))? AllocationLength : sizeof(SenseData);\r
\r
/* Succeed the command and update the bytes transferred counter */\r
CommandBlock.DataTransferLength -= BytesTransferred;\r
-\r
- return true;\r
}\r
\r
/** Command processing for an issued SCSI READ CAPACITY (10) command. This command returns information about the device's capacity\r
* on the selected Logical Unit (drive), as a number of OS-sized blocks.\r
- *\r
- * \return Boolean true if the command completed successfully, false otherwise.\r
*/\r
-static bool SCSI_Command_Read_Capacity_10(void)\r
+static void SCSI_Command_Read_Capacity_10(void)\r
{\r
/* Send the total number of logical blocks in the current LUN */\r
Endpoint_Write_DWord_BE(LUN_MEDIA_BLOCKS - 1);\r
\r
/* Check if the current command is being aborted by the host */\r
if (IsMassStoreReset)\r
- return false;\r
+ return;\r
\r
/* Send the endpoint data packet to the host */\r
Endpoint_ClearIN();\r
\r
/* Succeed the command and update the bytes transferred counter */\r
CommandBlock.DataTransferLength -= 8;\r
- \r
- return true;\r
}\r
\r
/** Command processing for an issued SCSI SEND DIAGNOSTIC command. This command performs a quick check of the Dataflash ICs on the\r
* supported.\r
*\r
* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface structure that the command is associated with\r
- *\r
- * \return Boolean true if the command completed successfully, false otherwise.\r
*/\r
-static bool SCSI_Command_Send_Diagnostic(void)\r
+static void SCSI_Command_Send_Diagnostic(void)\r
{\r
/* Check to see if the SELF TEST bit is not set */\r
if (!(CommandBlock.SCSICommandData[1] & (1 << 2)))\r
SCSI_ASENSE_INVALID_FIELD_IN_CDB,\r
SCSI_ASENSEQ_NO_QUALIFIER);\r
\r
- return false;\r
+ return;\r
}\r
\r
/* Check to see if all attached Dataflash ICs are functional */\r
SCSI_ASENSE_NO_ADDITIONAL_INFORMATION,\r
SCSI_ASENSEQ_NO_QUALIFIER); \r
\r
- return false;\r
+ return;\r
}\r
\r
/* Succeed the command and update the bytes transferred counter */\r
CommandBlock.DataTransferLength = 0;\r
- \r
- return true;\r
}\r
\r
/** Command processing for an issued SCSI READ (10) or WRITE (10) command. This command reads in the block start address\r
* reading and writing of the data.\r
*\r
* \param[in] IsDataRead Indicates if the command is a READ (10) command or WRITE (10) command (DATA_READ or DATA_WRITE)\r
- *\r
- * \return Boolean true if the command completed successfully, false otherwise.\r
*/\r
-static bool SCSI_Command_ReadWrite_10(const bool IsDataRead)\r
+static void SCSI_Command_ReadWrite_10(const bool IsDataRead)\r
{\r
uint32_t BlockAddress;\r
uint16_t TotalBlocks;\r
SCSI_ASENSE_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE,\r
SCSI_ASENSEQ_NO_QUALIFIER);\r
\r
- return false;\r
+ return;\r
}\r
\r
#if (TOTAL_LUNS > 1)\r
\r
/* Update the bytes transferred counter and succeed the command */\r
CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * VIRTUAL_MEMORY_BLOCK_SIZE);\r
- \r
- return true;\r
}\r
projects / pub / USBasp.git / blobdiff