/******************************************************************************
USB Host Mass Storage Device Driver Header File
Description:
This is the header file for a USB Embedded Host that is using the Mass
Storage Class.
This file should be included with usb_host.h to provide the USB hardware
interface. It must be included after the application-specific usb_config.h
file and after the USB Embedded Host header file usb_host.h, as definitions
in those files are required for proper compilation.
Acronyms/abbreviations used by this class:
* LUN - Logical Unit Number
* CBW - Command Block Wrapper
* CSW - Command Status Wrapper
To interface with usb_host.c, the routine USBHostMSDClientInitialize() should
be specified as the Initialize() function, and USBHostMSDClientEventHandler()
should be specified as the EventHandler() function in the
usbClientDrvTable[] array declared in usb_config.h.
This driver can be configured to use transfer events from usb_host.c.
Transfer events require more RAM and ROM than polling, but it cuts down or
even eliminates the required polling of the various USBxxxTasks functions.
For this class, USBHostMSDTasks() is compiled out if transfer events from
usb_host.c are used. However, USBHostTasks() still must be called to
provide attach, enumeration, and detach services. If transfer events from
usb_host.c are going to be used, USB_ENABLE_TRANSFER_EVENT should be
defined. If transfer status is going to be polled,
USB_ENABLE_TRANSFER_EVENT should not be defined.
This driver can also be configured to provide mass storage transfer events
to the next layer. Generating these events requires a small amount of
extra ROM, but no extra RAM. The layer above this driver must be
configured to receive and respond to the events. If mass storage transfer
events are going to be sent to the next layer,
USB_MSD_ENABLE_TRANSFER_EVENT should be defined. If mass storage transfer
status is going to be polled, USB_MSD_ENABLE_TRANSFER_EVENT should not be
defined.
Since mass storage is performed with bulk transfers,
USB_SUPPORT_BULK_TRANSFERS must be defined. For maximum throughput, it is
recommended that ALLOW_MULTIPLE_BULK_TRANSACTIONS_PER_FRAME be defined.
For maximum compatibility with mass storage devices, it is recommended that
ALLOW_MULTIPLE_NAKS_PER_FRAME not be defined.
Summary:
This is the header file for a USB Embedded Host that is using the Mass
Storage Class.
*******************************************************************************/
//DOM-IGNORE-BEGIN
/*******************************************************************************
* FileName: usb_host_msd.h
* Dependencies: None
* Processor: PIC24/dsPIC30/dsPIC33/PIC32MX
* Compiler: C30 v2.01/C32 v0.00.18
* Company: Microchip Technology, Inc.
Software License Agreement
The software supplied herewith by Microchip Technology Incorporated
(the Company) for its PICmicro® Microcontroller is intended and
supplied to you, the Companys customer, for use solely and
exclusively on Microchip PICmicro Microcontroller products. The
software is owned by the Company and/or its supplier, and is
protected under applicable copyright laws. All rights are reserved.
Any use in violation of the foregoing restrictions may subject the
user to criminal sanctions under applicable laws, as well as to
civil liability for the breach of the terms and conditions of this
license.
THIS SOFTWARE IS PROVIDED IN AN AS IS CONDITION. NO WARRANTIES,
WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
Change History:
Rev Description
----- ------------------------------------
2.6a- No change
2.7a
*******************************************************************************/
//DOM-IGNORE-END
//DOM-IGNORE-BEGIN
#ifndef _USBHOSTMSD_H_
#define _USBHOSTMSD_H_
//DOM-IGNORE-END
// *****************************************************************************
// *****************************************************************************
// Section: Constants
// *****************************************************************************
// *****************************************************************************
// *****************************************************************************
// Section: MSD Class Error Codes
// *****************************************************************************
#define MSD_COMMAND_PASSED 0x00 // Transfer was successful. Returned in dCSWStatus.
#define MSD_COMMAND_FAILED 0x01 // Transfer failed. Returned in dCSWStatus.
#define MSD_PHASE_ERROR 0x02 // Transfer phase error. Returned in dCSWStatus.
#define USB_MSD_ERROR USB_ERROR_CLASS_DEFINED // Error code offset.
#define USB_MSD_COMMAND_PASSED USB_SUCCESS // Command was successful.
#define USB_MSD_COMMAND_FAILED (USB_MSD_ERROR | MSD_COMMAND_FAILED)// Command failed at the device.
#define USB_MSD_PHASE_ERROR (USB_MSD_ERROR | MSD_PHASE_ERROR) // Command had a phase error at the device.
#define USB_MSD_OUT_OF_MEMORY (USB_MSD_ERROR | 0x03) // No dynamic memory is available.
#define USB_MSD_CBW_ERROR (USB_MSD_ERROR | 0x04) // The CBW was not transferred successfully.
#define USB_MSD_CSW_ERROR (USB_MSD_ERROR | 0x05) // The CSW was not transferred successfully.
#define USB_MSD_DEVICE_NOT_FOUND (USB_MSD_ERROR | 0x06) // Device with the specified address is not available.
#define USB_MSD_DEVICE_BUSY (USB_MSD_ERROR | 0x07) // A transfer is currently in progress.
#define USB_MSD_INVALID_LUN (USB_MSD_ERROR | 0x08) // Invalid LUN specified.
#define USB_MSD_MEDIA_INTERFACE_ERROR (USB_MSD_ERROR | 0x09) // The media interface layer cannot support the device.
#define USB_MSD_RESET_ERROR (USB_MSD_ERROR | 0x0A) // An error occurred while resetting the device.
#define USB_MSD_ILLEGAL_REQUEST (USB_MSD_ERROR | 0x0B) // Cannot perform requested operation.
// *****************************************************************************
// Section: Additional return values for USBHostMSDDeviceStatus (see USBHostDeviceStatus also)
// *****************************************************************************
#define USB_MSD_DEVICE_DETACHED 0x50 // Device is detached.
#define USB_MSD_INITIALIZING 0x51 // Device is initializing.
#define USB_MSD_NORMAL_RUNNING 0x52 // Device is running and available for data transfers.
#define USB_MSD_RESETTING_DEVICE 0x53 // Device is being reset.
#define USB_MSD_ERROR_STATE 0x55 // Device is holding due to a MSD error.
// *****************************************************************************
// Section: Interface and Protocol Constants
// *****************************************************************************
#define DEVICE_CLASS_MASS_STORAGE 0x08 // Class code for Mass Storage.
#define DEVICE_SUBCLASS_RBC 0x01 // SubClass code for Reduced Block Commands (not supported).
#define DEVICE_SUBCLASS_CD_DVD 0x02 // SubClass code for a CD/DVD drive (not supported).
#define DEVICE_SUBCLASS_TAPE_DRIVE 0x03 // SubClass code for a tape drive (not supported).
#define DEVICE_SUBCLASS_FLOPPY_INTERFACE 0x04 // SubClass code for a floppy disk interface (not supported).
#define DEVICE_SUBCLASS_REMOVABLE 0x05 // SubClass code for removable media (not supported).
#define DEVICE_SUBCLASS_SCSI 0x06 // SubClass code for a SCSI interface device (supported).
#define DEVICE_INTERFACE_PROTOCOL_BULK_ONLY 0x50 // Protocol code for Bulk-only mass storage.
// *****************************************************************************
// Section: MSD Event Definition
// *****************************************************************************
// If the application has not defined an offset for MSD events, set it to 0.
#ifndef EVENT_MSD_OFFSET
#define EVENT_MSD_OFFSET 0
#endif
#define EVENT_MSD_NONE EVENT_MSD_BASE + EVENT_MSD_OFFSET + 0 // No event occured (NULL event)
#define EVENT_MSD_TRANSFER EVENT_MSD_BASE + EVENT_MSD_OFFSET + 1 // A MSD transfer has completed
#define EVENT_MSD_RESET EVENT_MSD_BASE + EVENT_MSD_OFFSET + 2 // MSD reset complete
#define EVENT_MSD_MAX_LUN EVENT_MSD_BASE + EVENT_MSD_OFFSET + 3 // Set maximum LUN for the device
// *****************************************************************************
// *****************************************************************************
// Section: Function Prototypes and Macro Functions
// *****************************************************************************
// *****************************************************************************
/****************************************************************************
Function:
BYTE USBHostMSDDeviceStatus( BYTE deviceAddress )
Description:
This function determines the status of a mass storage device.
Precondition:
None
Parameters:
BYTE deviceAddress - address of device to query
Return Values:
USB_MSD_DEVICE_NOT_FOUND - Illegal device address, or the device is not
an MSD
USB_MSD_INITIALIZING - MSD is attached and in the process of
initializing
USB_MSD_NORMAL_RUNNING - MSD is in normal running mode
USB_MSD_RESETTING_DEVICE - MSD is resetting
USB_MSD_DEVICE_DETACHED - MSD detached. Should not occur
USB_MSD_ERROR_STATE - MSD is holding due to an error. No
communication is allowed.
Other - Return codes from USBHostDeviceStatus() will
also be returned if the device is in the
process of enumerating.
Remarks:
None
***************************************************************************/
BYTE USBHostMSDDeviceStatus( BYTE deviceAddress );
/*******************************************************************************
Function:
BYTE USBHostMSDRead( BYTE deviceAddress, BYTE deviceLUN, BYTE *commandBlock,
BYTE commandBlockLength, BYTE *data, DWORD dataLength );
Description:
This function starts a mass storage read, utilizing the function
USBHostMSDTransfer();
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
BYTE deviceLUN - Device LUN to access
BYTE *commandBlock - Pointer to the command block for the CBW
BYTE commandBlockLength - Length of the command block
BYTE *data - Pointer to the data buffer
DWORD dataLength - Byte size of the data buffer
Return Values:
USB_SUCCESS - Request started successfully
USB_MSD_DEVICE_NOT_FOUND - No device with specified address
USB_MSD_DEVICE_BUSY - Device not in proper state for
performing a transfer
USB_MSD_INVALID_LUN - Specified LUN does not exist
Remarks:
None
*******************************************************************************/
#define USBHostMSDRead( deviceAddress,deviceLUN,commandBlock,commandBlockLength,data,dataLength ) \
USBHostMSDTransfer( deviceAddress, deviceLUN, 1, commandBlock, commandBlockLength, data, dataLength )
/****************************************************************************
Function:
BYTE USBHostMSDResetDevice( BYTE deviceAddress )
Summary:
This function starts a bulk-only mass storage reset.
Description:
This function starts a bulk-only mass storage reset. A reset can be
issued only if the device is attached and not being initialized.
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
Return Values:
USB_SUCCESS - Reset started
USB_MSD_DEVICE_NOT_FOUND - No device with specified address
USB_MSD_ILLEGAL_REQUEST - Device is in an illegal state for reset
Remarks:
None
***************************************************************************/
BYTE USBHostMSDResetDevice( BYTE deviceAddress );
/****************************************************************************
Function:
void USBHostMSDTasks( void )
Summary:
This function performs the maintenance tasks required by the mass storage
class.
Description:
This function performs the maintenance tasks required by the mass storage
class. If transfer events from the host layer are not being used, then
it should be called on a regular basis by the application. If transfer
events from the host layer are being used, this function is compiled out,
and does not need to be called.
Precondition:
USBHostMSDInitialize() has been called.
Parameters:
None - None
Returns:
None
Remarks:
None
***************************************************************************/
void USBHostMSDTasks( void );
/****************************************************************************
Function:
void USBHostMSDTerminateTransfer( BYTE deviceAddress )
Description:
This function terminates a mass storage transfer.
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
Returns:
None
Remarks:
After executing this function, the application may have to reset the
device in order for the device to continue working properly.
***************************************************************************/
void USBHostMSDTerminateTransfer( BYTE deviceAddress );
/****************************************************************************
Function:
BYTE USBHostMSDTransfer( BYTE deviceAddress, BYTE deviceLUN,
BYTE direction, BYTE *commandBlock, BYTE commandBlockLength,
BYTE *data, DWORD dataLength )
Summary:
This function starts a mass storage transfer.
Description:
This function starts a mass storage transfer. Usually, applications will
probably utilize a read/write wrapper to access this function.
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
BYTE deviceLUN - Device LUN to access
BYTE direction - 1=read, 0=write
BYTE *commandBlock - Pointer to the command block for the CBW
BYTE commandBlockLength - Length of the command block
BYTE *data - Pointer to the data buffer
DWORD dataLength - Byte size of the data buffer
Return Values:
USB_SUCCESS - Request started successfully
USB_MSD_DEVICE_NOT_FOUND - No device with specified address
USB_MSD_DEVICE_BUSY - Device not in proper state for performing
a transfer
USB_MSD_INVALID_LUN - Specified LUN does not exist
Remarks:
None
***************************************************************************/
BYTE USBHostMSDTransfer( BYTE deviceAddress, BYTE deviceLUN, BYTE direction, BYTE *commandBlock,
BYTE commandBlockLength, BYTE *data, DWORD dataLength );
/****************************************************************************
Function:
BOOL USBHostMSDTransferIsComplete( BYTE deviceAddress,
BYTE *errorCode, DWORD *byteCount )
Summary:
This function indicates whether or not the last transfer is complete.
Description:
This function indicates whether or not the last transfer is complete. If
the functions returns TRUE, the returned byte count and error code are
valid. Since only one transfer can be performed at once and only one
endpoint can be used, we only need to know the device address.
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
BYTE *errorCode - Error code from last transfer
DWORD *byteCount - Number of bytes transferred
Return Values:
TRUE - Transfer is complete, errorCode is valid
FALSE - Transfer is not complete, errorCode is not valid
Remarks:
None
***************************************************************************/
BOOL USBHostMSDTransferIsComplete( BYTE deviceAddress, BYTE *errorCode, DWORD *byteCount );
/*******************************************************************************
Function:
BYTE USBHostMSDWrite( BYTE deviceAddress, BYTE deviceLUN, BYTE *commandBlock,
BYTE commandBlockLength, BYTE *data, DWORD dataLength );
Description:
This function starts a mass storage write, utilizing the function
USBHostMSDTransfer();
Precondition:
None
Parameters:
BYTE deviceAddress - Device address
BYTE deviceLUN - Device LUN to access
BYTE *commandBlock - Pointer to the command block for the CBW
BYTE commandBlockLength - Length of the command block
BYTE *data - Pointer to the data buffer
DWORD dataLength - Byte size of the data buffer
Return Values:
USB_SUCCESS - Request started successfully
USB_MSD_DEVICE_NOT_FOUND - No device with specified address
USB_MSD_DEVICE_BUSY - Device not in proper state for
performing a transfer
USB_MSD_INVALID_LUN - Specified LUN does not exist
Remarks:
None
*******************************************************************************/
#define USBHostMSDWrite( deviceAddress,deviceLUN,commandBlock,commandBlockLength,data,dataLength ) \
USBHostMSDTransfer( deviceAddress, deviceLUN, 0, commandBlock, commandBlockLength, data, dataLength )
// *****************************************************************************
// *****************************************************************************
// Section: Host Stack Interface Functions
// *****************************************************************************
// *****************************************************************************
/****************************************************************************
Function:
BOOL USBHostMSDInitialize( BYTE address, DWORD flags, BYTE clientDriverID )
Summary:
This function is the initialization routine for this client driver.
Description:
This function is the initialization routine for this client driver. It
is called by the host layer when the USB device is being enumerated. For
a mass storage device, we need to make sure that we have room for a new
device, and that the device has at least one bulk IN and one bulk OUT
endpoint.
Precondition:
None
Parameters:
BYTE address - Address of the new device
DWORD flags - Initialization flags
BYTE clientDriverID - ID to send when issuing a Device Request via
USBHostSendDeviceRequest(), USBHostSetDeviceConfiguration(),
or USBHostSetDeviceInterface().
Return Values:
TRUE - We can support the device.
FALSE - We cannot support the device.
Remarks:
None
***************************************************************************/
BOOL USBHostMSDInitialize( BYTE address, DWORD flags, BYTE clientDriverID );
/****************************************************************************
Function:
BOOL USBHostMSDEventHandler( BYTE address, USB_EVENT event,
void *data, DWORD size )
Summary:
This function is the event handler for this client driver.
Description:
This function is the event handler for this client driver. It is called
by the host layer when various events occur.
Precondition:
The device has been initialized.
Parameters:
BYTE address - Address of the device
USB_EVENT event - Event that has occurred
void *data - Pointer to data pertinent to the event
WORD size - Size of the data
Return Values:
TRUE - Event was handled
FALSE - Event was not handled
Remarks:
None
***************************************************************************/
BOOL USBHostMSDEventHandler( BYTE address, USB_EVENT event, void *data, DWORD size );
#endif
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