Difference between revisions of "Unit Storage"

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'''Storage helper functions'''
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<pre style="border: 0; padding-bottom:0px;">function StorageGetCount:LongWord; inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current storage count</div>
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<pre style="border: 0; padding-bottom:0px;">function StorageDeviceCheck(Storage:PStorageDevice):PStorageDevice;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the supplied Storage is in the storage table</div>
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<pre style="border: 0; padding-bottom:0px;">function StorageDeviceTypeToString(StorageType:LongWord):String;</pre>
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<pre style="border: 0; padding-bottom:0px;">function StorageDeviceStateToString(StorageState:LongWord):String;</pre>
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<pre style="border: 0; padding-bottom:0px;">function StorageDeviceStateToNotification(State:LongWord):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a Storage state value into the notification code for device notifications</div>
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<pre style="border: 0; padding-bottom:0px;">procedure StorageLog(Level:LongWord; Storage:PStorageDevice; const AText:String);</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<pre style="border: 0; padding-bottom:0px;">procedure StorageLogInfo(Storage:PStorageDevice; const AText:String);</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure StorageLogError(Storage:PStorageDevice; const AText:String);</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure StorageLogDebug(Storage:PStorageDevice; const AText:String);</pre>
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<pre style="border: 0; padding-bottom:0px;">procedure StorageStatusTimer(Storage:PStorageDevice);</pre>
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Revision as of 05:15, 2 September 2016

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Description

Storage Devices

This unit provides both the Storage device interface and the generic USB mass storage driver.

USB Mass Storage Devices

The USB Mass Storage Class Control/Bulk/Interrupt (CBI) Transport specification is approved for use only with full-speed floppy disk drives. CBI shall not be used in high-speed capable devices, or in devices other than floppy disk drives. CBI shall not be used in devices that implement LSDFS. Usage of CBI for any new design is discouraged.

Therefore the majority of USB Mass Storage devices use the Bulk only interface.

USB mass storage class devices normally use the SCSI command set and therefore the USB storage driver consumes the SCSI unit for the protocol and command definitions. USB mass storage devices are registered directly as Storage devices not as SCSI devices.

Constants

To be documented

Type definitions

To be documented

Public variables

To be documented

Function declarations


Initialization functions 

procedure StorageInit;
Description: To be documented
Note To be documented


Storage functions 

function StorageDeviceRead(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note To be documented 


function StorageDeviceWrite(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note To be documented 


function StorageDeviceErase(Storage:PStorageDevice; const Start,Count:Int64):LongWord;
Description: To be documented
Note To be documented 


function StorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;
Description: To be documented
Note To be documented 


function StorageDeviceSetState(Storage:PStorageDevice; State:LongWord):LongWord;
Description: Set the state of the specified storage and send a notification
Storage The storage to set the state for
State The new state to set and notify
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceStartStatus(Storage:PStorageDevice; Interval:LongWord):LongWord;
Description: Start status monitoring on the specified storage for insert/eject notifications
Storage The storage to start status monitoring for
Interval The status monitoring interval in milliseconds
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceStopStatus(Storage:PStorageDevice):LongWord;
Description: Stop status monitoring on the specified storage for insert/eject notifications
Storage The storage to stop status monitoring for
Return ERROR_SUCCESS if completed or another error code on failure 


function StorageDeviceCreate:PStorageDevice;
Description: Create a new Storage entry
Return Pointer to new Storage entry or nil if storage could not be created 


function StorageDeviceCreateEx(Size:LongWord):PStorageDevice;
Description: Create a new Storage entry
Size Size in bytes to allocate for new storage (Including the storage entry)
Return Pointer to new Storage entry or nil if storage could not be created 


function StorageDeviceDestroy(Storage:PStorageDevice):LongWord;
Description: Destroy an existing Storage entry
Note To be documented 


function StorageDeviceRegister(Storage:PStorageDevice):LongWord;
Description: Register a new Storage in the Storage table
Note To be documented 


function StorageDeviceDeregister(Storage:PStorageDevice):LongWord;
Description: Deregister a Storage from the Storage table
Note To be documented 


function StorageDeviceFind(StorageId:LongWord):PStorageDevice;
Description: To be documented
Note To be documented 


function StorageDeviceFindByName(const Name:String):PStorageDevice; inline;
Description: To be documented
Note To be documented 


function StorageDeviceFindByDescription(const Description:String):PStorageDevice; inline;
Description: To be documented
Note To be documented 


function StorageDeviceEnumerate(Callback:TStorageEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note To be documented 


function StorageDeviceNotification(Storage:PStorageDevice; Callback:TStorageNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
Note To be documented


USB storage functions 

function USBStorageDeviceRead(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device 


function USBStorageDeviceWrite(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device 


function USBStorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;
Description: To be documented
Note According to 3.4 of USB Mass Storage Bulk Only 1.0, requests must be queued one at a time to a device 


function USBStorageDriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Bind the Storage driver to a USB device if it is suitable
Device The USB device to attempt to bind to
Interrface The USB interface to attempt to bind to (or nil for whole device)
Return USB_STATUS_SUCCESS if completed, USB_STATUS_DEVICE_UNSUPPORTED if unsupported or another error code on failure 


function USBStorageDriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Unbind the Storage driver from a USB device
Device The USB device to unbind from
Interrface The USB interface to unbind from (or nil for whole device)
Return USB_STATUS_SUCCESS if completed or another error code on failure 


procedure USBStorageReadComplete(Request:PUSBRequest);
Description: Called when a USB request from a USB storage bulk IN endpoint completes
Request The USB request which has completed
Note The thread that submitted the read request will hold the storage lock 


procedure USBStorageWriteComplete(Request:PUSBRequest);
Description: Called when a USB request from a USB storage bulk OUT endpoint completes
Request The USB request which has completed
Note The thread that submitted the write request will hold the storage lock 


procedure USBStorageInterruptComplete(Request:PUSBRequest);
Description: Called when a USB request from a USB storage IN interrupt endpoint completes
Request The USB request which has completed
Note The thread that submitted the interrupt request will hold the storage lock


Storage helper functions 

function StorageGetCount:LongWord; inline;
Description: Get the current storage count
Note To be documented 


function StorageDeviceCheck(Storage:PStorageDevice):PStorageDevice;
Description: Check if the supplied Storage is in the storage table
Note To be documented 


function StorageDeviceTypeToString(StorageType:LongWord):String;
Description: To be documented
Note To be documented 


function StorageDeviceStateToString(StorageState:LongWord):String;
Description: To be documented
Note To be documented 


function StorageDeviceStateToNotification(State:LongWord):LongWord;
Description: Convert a Storage state value into the notification code for device notifications
Note To be documented 


procedure StorageLog(Level:LongWord; Storage:PStorageDevice; const AText:String);
Description: To be documented
Note To be documented 


procedure StorageLogInfo(Storage:PStorageDevice; const AText:String);
Description: To be documented
Note To be documented 


procedure StorageLogError(Storage:PStorageDevice; const AText:String);
Description: To be documented
Note To be documented 


procedure StorageLogDebug(Storage:PStorageDevice; const AText:String);
Description: To be documented
Note To be documented 


procedure StorageStatusTimer(Storage:PStorageDevice);
Description: To be documented
Note To be documented


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