@ -78,12 +78,87 @@
uint16_t DataINPipeSize ; /**< Size in bytes of the MS interface's IN data pipe */
uint16_t DataOUTPipeSize ; /**< Size in bytes of the MS interface's OUT data pipe */
uint32_t TransactionTag ; /**< Current transaction tag for data synchronising of packets */
} State ; /**< State data for the USB class interface within the device. All elements in this section
* < b > may < / b > be set to initial values , but may also be ignored to default to sane values when
* the interface is enumerated .
*/
} USB_ClassInfo_MS_Host_t ;
/** Type define for a SCSI Sense structure. Structures of this type are filled out by the
* device via the MassStore_RequestSense ( ) function , indicating the current sense data of the
* device ( giving explicit error codes for the last issued command ) . For details of the
* structure contents , refer to the SCSI specifications .
*/
typedef struct
{
uint8_t ReponseCode ;
uint8_t SegmentNumber ;
unsigned char SenseKey : 4 ;
unsigned char _RESERVED1 : 1 ;
unsigned char ILI : 1 ;
unsigned char EOM : 1 ;
unsigned char FileMark : 1 ;
uint8_t Information [ 4 ] ;
uint8_t AdditionalLength ;
uint8_t CmdSpecificInformation [ 4 ] ;
uint8_t AdditionalSenseCode ;
uint8_t AdditionalSenseQualifier ;
uint8_t FieldReplaceableUnitCode ;
uint8_t SenseKeySpecific [ 3 ] ;
} SCSI_Request_Sense_Response_t ;
/** Type define for a SCSI Inquiry structure. Structures of this type are filled out by the
* device via the MassStore_Inquiry ( ) function , retrieving the attached device ' s information .
* For details of the structure contents , refer to the SCSI specifications .
*/
typedef struct
{
unsigned char DeviceType : 5 ;
unsigned char PeripheralQualifier : 3 ;
unsigned char _RESERVED1 : 7 ;
unsigned char Removable : 1 ;
uint8_t Version ;
unsigned char ResponseDataFormat : 4 ;
unsigned char _RESERVED2 : 1 ;
unsigned char NormACA : 1 ;
unsigned char TrmTsk : 1 ;
unsigned char AERC : 1 ;
uint8_t AdditionalLength ;
uint8_t _RESERVED3 [ 2 ] ;
unsigned char SoftReset : 1 ;
unsigned char CmdQue : 1 ;
unsigned char _RESERVED4 : 1 ;
unsigned char Linked : 1 ;
unsigned char Sync : 1 ;
unsigned char WideBus16Bit : 1 ;
unsigned char WideBus32Bit : 1 ;
unsigned char RelAddr : 1 ;
uint8_t VendorID [ 8 ] ;
uint8_t ProductID [ 16 ] ;
uint8_t RevisionID [ 4 ] ;
} SCSI_Inquiry_Response_t ;
/** SCSI capacity structure, to hold the total capacity of the device in both the number
* of blocks in the current LUN , and the size of each block . This structure is filled by
* the device when the MassStore_ReadCapacity ( ) function is called .
*/
typedef struct
{
uint32_t Blocks ; /**< Number of blocks in the addressed LUN of the device */
uint32_t BlockSize ; /**< Number of bytes in each block in the addressed LUN */
} SCSI_Capacity_t ;
/* Enums: */
enum
{
@ -94,9 +169,46 @@
} MSHost_EnumerationFailure_ErrorCodes_t ;
/* Function Prototypes: */
void MS_Host_USBTask ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ) ;
/** General management task for a given Mass Storage host class interface, required for the correct operation of
* the interface . This should be called frequently in the main program loop , before the master USB management task
* \ ref USB_USBTask ( ) .
*
* \ param [ in , out ] MSInterfaceInfo Pointer to a structure containing an MS Class host configuration and state
*/
void MS_Host_USBTask ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ) ATTR_NON_NULL_PTR_ARG ( 1 ) ;
/** Host interface configuration routine, to configure a given Mass Storage host interface instance using the
* Configuration Descriptor read from an attached USB device . This function automatically updates the given Mass
* Storage Host instance ' s state values and configures the pipes required to communicate with the interface if it
* is found within the device . This should be called once after the stack has enumerated the attached device , while
* the host state machine is in the Addressed state .
*
* \ param [ in , out ] MSInterfaceInfo Pointer to a structure containing an MS Class host configuration and state
* \ param [ in ] ConfigDescriptorLength Length of the attached device ' s Configuration Descriptor
* \ param [ in ] DeviceConfigDescriptor Pointer to a buffer containing the attached device ' s Configuration Descriptor
*/
uint8_t MS_Host_ConfigurePipes ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo , uint16_t ConfigDescriptorLength ,
uint8_t * DeviceConfigDescriptor ) ;
uint8_t * DeviceConfigDescriptor ) ATTR_NON_NULL_PTR_ARG ( 1 , 3 ) ;
/** Sends a MASS STORAGE RESET control request to the attached device, resetting the Mass Storage Interface
* and readying it for the next Mass Storage command .
*
* \ param [ in , out ] MSInterfaceInfo Pointer to a structure containing a MS Class host configuration and state
*
* \ return A value from the \ ref USB_Host_SendControlErrorCodes_t enum
*/
uint8_t MS_Host_ResetMSInterface ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ) ATTR_NON_NULL_PTR_ARG ( 1 ) ;
uint8_t MS_Host_GetMaxLUN ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo , uint8_t * MaxLUNIndex ) ATTR_NON_NULL_PTR_ARG ( 1 , 2 ) ;
uint8_t MS_Host_GetInquiryData ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ,
SCSI_Inquiry_Response_t * InquiryData ) ATTR_NON_NULL_PTR_ARG ( 1 , 2 ) ;
uint8_t MS_Host_TestUnitReady ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo , uint8_t LUNIndex ,
bool * DeviceReady ) ATTR_NON_NULL_PTR_ARG ( 1 , 3 ) ;
uint8_t MS_Host_ReadDeviceCapacity ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo , uint8_t LUNIndex ,
SCSI_Capacity_t * DeviceCapacity ) ATTR_NON_NULL_PTR_ARG ( 1 , 3 ) ;
/* Private Interface - For use in library only: */
# if !defined(__DOXYGEN__)
@ -105,6 +217,17 @@
# define MASS_STORE_SUBCLASS 0x06
# define MASS_STORE_PROTOCOL 0x50
# define REQ_MassStorageReset 0xFF
# define REQ_GetMaxLUN 0xFE
# define CBW_SIGNATURE 0x43425355UL
# define CSW_SIGNATURE 0x53425355UL
# define COMMAND_DIRECTION_DATA_OUT (0 << 7)
# define COMMAND_DIRECTION_DATA_IN (1 << 7)
# define COMMAND_DATA_TIMEOUT_MS 2000
# define MS_FOUND_DATAPIPE_IN (1 << 0)
# define MS_FOUND_DATAPIPE_OUT (1 << 1)
@ -112,6 +235,14 @@
# if defined(INCLUDE_FROM_MS_CLASS_HOST_C)
static uint8_t DComp_NextMassStorageInterface ( void * CurrentDescriptor ) ;
static uint8_t DComp_NextInterfaceBulkDataEndpoint ( void * CurrentDescriptor ) ;
static uint8_t MassStore_SendCommand ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ,
MS_CommandBlockWrapper_t * SCSICommandBlock ) ;
static uint8_t MassStore_WaitForDataReceived ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ) ;
static uint8_t MassStore_SendReceiveData ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ,
MS_CommandBlockWrapper_t * SCSICommandBlock , void * BufferPtr ) ;
static uint8_t MassStore_GetReturnedStatus ( USB_ClassInfo_MS_Host_t * MSInterfaceInfo ,
MS_CommandStatusWrapper_t * SCSICommandStatus ) ;
# endif
# endif
Dean Camera
16 years ago