Difference between revisions of "Unit USB"

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This driver does not attempt to do any intelligent power management, bandwidth allocation, or transfer scheduling. Devices are always set to their first listed configuration regardless of power requirements. Requests are simply passed to the Host Controller Driver in the order submitted, the Host Controller Driver is responsible for doing any more intelligent scheduling if desired.

This driver does not support multiple configurations per USB device. If a device happens to have multiple configurations, the first one will be assigned (see devices below for more information).

By design, it is possible to implement a host controller driver for different host controller hardware without changing any of this code, as long as the host controller driver provides the functions declared in TUSBHost (Start, Stop, Reset, Submit and Cancel).

By design, this driver has a hard-coded dependency on the USB hub driver because USB is useless without hubs.

To initialize this core USB driver, USBInit must be called by the system startup code. See that function for details.

If the flag USB_AUTOSTART is not set then USBStart must be called to start the USB core. See that function for details.

The other functions exported by this core USB driver are mostly intended to be used by USB device drivers.

Debugging messages in this driver can be enabled by changing the value of USB_DEFAULT_LOG_LEVEL and by enabling the USB_DEBUG define in GlobalDefines.

Be careful when enabling USB debugging as the USB core can generate a lot of messages due to constant polling of interrupt endpoints on devices such as hubs, keyboards and mice.

USB Device

USB devices are the generic implementation of anything that can be connected to the USB bus. All USB devices require a driver to implement the specific behaviour of the device but at the generic level each device will have:

One or more configurations available. The USB core will first offer the device to drivers without a configuration being selected, the driver may choose a specific configuration if required otherwise the core will simply select the first available configuration.

One or more interfaces available. On devices with multiple interfaces, the USB core supports different drivers binding to different interfaces. This way combination devices are supported.

One or more endpoints available. All devices must have a control endpoint and most devices will have one or more bulk, interrupt or isochronous endpoints as well. The USB core will only communicate with the control endpoint to perform generic operations like reading the descriptors and assigning a device address.

Drivers are expected to understand which endpoints they need to communicate with to provide the device specific functionality.

Devices are considered dynamic by the USB core and can be connected or disconnected at any time. The hub driver is responsible for attaching and detaching devices in response to hub status change events and for binding or unbinding drivers as devices are added or removed.

USB Driver

USB drivers implement support for specific devices or specific device classes and provide the interfaces to present those devices to other parts of the system. For example the USB Mass Storage driver accepts devices of the mass storage class and presents them to the file system as a disk device.

All drivers must implement the functions defined in TUSBDriver (Bind and Unbind) and must register themselves with the USB core by calling USBDriverRegister. When a new device is detected the hub driver will enumerate all drivers and call their Bind functions until either one of the drivers accepts the device or all drivers have rejected the device. The hub driver first attempts to bind each driver to the device itself and then offers each driver the option to bind to a single interface on the device. In this way devices that have multiple interfaces of different classes (such as a wireless mouse and keyboard dongle) can actually be bound to multiple drivers which each service a specific interface.

When a new driver is registered the USB core will call the drivers Bind function for each device already present to allow the driver an opportunity to bind to any existing devices that are not serviced by other drivers.

When a device is disconnected the hub driver will first call the Unbind function of any driver that is servicing the device to allow the driver to clean up allocated resources and cancel outstanding requests. Drivers must be careful not to block the hub driver during this process, for example trying to send a USB control message to the device at this time will likely be pointless as in many cases the device will have already been disconnected from the system.

USB Host

USB hosts implement the hardware level interface that supports sending USB requests to the hardware and receiving responses. All handling of interrupts, DMA, transaction sequence, errors and resubmitting/retrying requests is done by the USB host driver. All host drivers must implement the functions defined in TUSBHost (Start, Stop, Reset, Submit and Cancel) and must register themselves with the USB core by calling USBHostRegister. When the USB core is started each registered host driver will be called via the Start function so it can initialize itself and allocate locks, buffers and other resources required to interact with the hardware.

A host driver can also be registered after the USB core has been started and it will be given the opportunity to start itself immediately. In this way USB hosts can potentially be hot pluggable.

Each host driver must also implement a root hub which represents the port or ports that are directly connected to the controller hardware. In many cases this will not be a real hub but will be simulated in the host driver so that the hub driver can interact with it as though it was a standard hub device.

USB Hub

Hubs are one of the fundamental devices in USB and are used to provide connection points (ports) for additional devices. Note that even if no "external" hub is plugged in, the USB still will have at least one logical hub (the root hub) and usually additional "internal" hubs. That is, a USB is a tree of devices where the root node and all non-leaf nodes are hubs. A port on a USB hub may correspond to a port you can physically plug a device into or may correspond to an internal port. USB hubs are commonly based around a design that has 4 ports per hub, so a standard 7 port hub will most often appear as 2 hubs to this driver with one hub connected to a port on the other.

This hub driver is an example of a USB device driver, but it is somewhat special as it mandatory to include this driver if USB is supported at all. This is because it would be impossible to access any USB devices if a hub driver were not available. This hub driver also uses some interfaces in the core driver, such as USBDeviceAttach, that are not useful to any other USB device driver.

The initial entry point of this USB hub driver is USBHubDriverBind, which is called when the USB core has configured a newly attached USB device that may be a hub. USBHubDriverBind is responsible for checking if the device is a hub, and if so, doing hub-specific setup, reading the hub descriptor, powering on the ports, and submitting an asynchronous USB interrupt request to the hub's status change endpoint.

Everything else this hub driver does happens asynchronously as a response to a status change request being completed. Every USB hub has exactly one IN interrupt endpoint called the "status change endpoint". The hub responds on this endpoint whenever the status of the hub or one of the hub's ports has changed, for example when a USB device has been connected or disconnected from a port.

At the hardware level, when a hub has data to send on its status change endpoint, an interrupt will come in from the USB host controller. This eventually will result in the status change transfer being completed and USBHubStatusComplete being called. Thus, the detection of status changes is interrupt-driven and is not implemented by polling at the software level. (At the hardware level, USB is still a polled bus, but the host controller hardware handles that for us). Upon detecting a status change on one or more ports on a hub, the hub driver then must submit one or more control messages to the hub to determine exactly what changed on the affected ports.

Constants

USB device, driver and host specific constants USB_*_PREFIX

`USB_DEVICE_PREFIX = 'USB';`	Name prefix for USB Devices
`USB_DRIVER_PREFIX = 'USB';`	Name prefix for USB Drivers
`USB_HOST_PREFIX = 'USBHost';`	Name prefix for USB Hosts

USB device type USB_TYPE_*

`USB_TYPE_NONE = 0;`

`USB_TYPE_MAX = 0;`

USB device state USB_STATE_*

`USB_STATE_DETACHED = 0;`
`USB_STATE_DETACHING = 1;`
`USB_STATE_ATTACHING = 2;`
`USB_STATE_ATTACHED = 3;`

`USB_STATE_MAX = 3;`

USB device status USB_STATUS_*

`USB_STATUS_UNBOUND = 0;`
`USB_STATUS_BOUND = 1;`

`USB_STATUS_MAX = 1;`

USB device flag USB_FLAG_*

`USB_FLAG_NONE = $00000000;`

USB host type USBHOST_TYPE_*

`USBHOST_TYPE_NONE = 0;`
`USBHOST_TYPE_EHCI = 1;`
`USBHOST_TYPE_OHCI = 2;`
`USBHOST_TYPE_UHCI = 3;`
`USBHOST_TYPE_XHCI = 4;`
`USBHOST_TYPE_DWCOTG = 5;`

`USBHOST_TYPE_MAX = 5;`

USB host state USBHOST_STATE_*

`USBHOST_STATE_DISABLED = 0;`
`USBHOST_STATE_ENABLED = 1;`

`USBHOST_STATE_MAX = 1;`

USB host flag USBHOST_FLAG_*

`USBHOST_FLAG_NONE = $00000000;`
`USBHOST_FLAG_SHARED = $00000001;`
`USBHOST_FLAG_NOCACHE = $00000002;`

USB status code USB_STATUS_*

`USB_STATUS_SUCCESS = 0;`	Function successful
`USB_STATUS_DEVICE_DETACHED = 1;`	USB device was detached
`USB_STATUS_DEVICE_UNSUPPORTED = 2;`	USB device is unsupported by the driver
`USB_STATUS_HARDWARE_ERROR = 3;`	Hardware error of some form occurred
`USB_STATUS_INVALID_DATA = 4;`	Invalid data was received
`USB_STATUS_INVALID_PARAMETER = 5;`	An invalid parameter was passed to the function
`USB_STATUS_NOT_PROCESSED = 6;`	The USB request has been submitted but not yet processed
`USB_STATUS_OUT_OF_MEMORY = 7;`	Failed to allocate memory
`USB_STATUS_TIMEOUT = 8;`	The operation timed out
`USB_STATUS_UNSUPPORTED_REQUEST = 9;`	The request is unsupported
`USB_STATUS_HARDWARE_STALL = 10;`	The device reported an endpoint STALL
`USB_STATUS_OPERATION_FAILED = 11;`	The operation was not able to be completed
`USB_STATUS_NOT_BOUND = 12;`	USB device is not bound to a driver
`USB_STATUS_ALREADY_BOUND = 13;`	USB device is already bound to a driver
`USB_STATUS_NOT_READY = 14;`	USB device is not in a ready state
`USB_STATUS_NOT_COMPLETED = 15;`	The USB request has been scheduled but not yet completed
`USB_STATUS_CANCELLED = 16;`	The USB request was cancelled
`USB_STATUS_NOT_VALID = 17;`	The USB request is not valid

USB request flag USB_REQUEST_FLAG_*

`USB_REQUEST_FLAG_NONE = $00000000;`
`USB_REQUEST_FLAG_ALLOCATED = $00000001;`	Request data has been allocated by USBBufferAllocate (and can be freed by USBBufferRelease)
`USB_REQUEST_FLAG_COMPATIBLE = $00000002;`	Request data is compatible with DMA requirements of host configuration (Can be passed directly to DMA)
`USB_REQUEST_FLAG_ALIGNED = $00000004;`	Request data is aligned according to host configuration
`USB_REQUEST_FLAG_SIZED = $00000008;`	Request data is sized according to host configuration
`USB_REQUEST_FLAG_SHARED = $00000010;`	Request data has been allocated from Shared memory
`USB_REQUEST_FLAG_NOCACHE = $00000020;`	Request data has been allocated from Non Cached memory

USB control phase USB_CONTROL_PHASE_*

`USB_CONTROL_PHASE_SETUP = 0;`	Setup phase of a Control request (Using SetupData)
`USB_CONTROL_PHASE_DATA = 1;`	Data phase of a Control request (Using Data buffer)
`USB_CONTROL_PHASE_STATUS = 2;`	Status phase of a Control request (Using StatusData)

USB control timeout USB_CONTROL_*

`USB_CONTROL_GET_TIMEOUT = 5000;`
`USB_CONTROL_SET_TIMEOUT = 5000;`

USB packet size USB_*_*_PACKET_SIZE

`USB_DEFAULT_MAX_PACKET_SIZE = 8;`	Default maximum packet size for unconfigured Endpoints
`USB_ALTERNATE_MAX_PACKET_SIZE = 64;`

`USB_MAX_PACKET_SIZE = 1024;`	Maximum packet size of any USB Endpoint (1024 is the maximum allowed by USB 2.0)

USB frame USB_FRAMES_*

`USB_FRAMES_PER_MS = 1;`	Number of USB frames per millisecond

USB microframe USB_UFRAMES_*

`USB_UFRAMES_PER_MS = 8;`	Number of USB microframes per millisecond

USB configuration attribute USB_CONFIGURATION_ATTRIBUTE_*

Values for bmAttributes in type TUSBConfigurationDescriptor

`USB_CONFIGURATION_ATTRIBUTE_RESERVED_HIGH = $80;`
`USB_CONFIGURATION_ATTRIBUTE_SELF_POWERED = $40;`
`USB_CONFIGURATION_ATTRIBUTE_REMOTE_WAKEUP = $20;`
`USB_CONFIGURATION_ATTRIBUTE_RESERVED_LOW = $1f;`

USB device status USB_DEVICE_STATUS_*

See Figure 9-4 of Section 9.4 of the USB 2.0 specification
Values for wStatus in type TUSBDeviceStatus (Device Recipient)

`USB_DEVICE_STATUS_SELF_POWERED = (1 shl 0);`
`USB_DEVICE_STATUS_REMOTE_WAKEUP = (1 shl 1);`

USB endpoint status USB_ENDPOINT_STATUS_*

See Figure 9-6 of Section 9.4 of the USB 2.0 specification
Values for vStatus in type TUSBDeviceStatus (Endpoint Recipient)

`USB_ENDPOINT_STATUS_HALT = (1 shl 0);`

USB device speed USB_SPEED_*

`USB_SPEED_HIGH = 0;`	480 Mb/s
`USB_SPEED_FULL = 1;`	12 Mb/s
`USB_SPEED_LOW = 2;`	1.5 Mb/s
`USB_SPEED_SUPER = 3;`	5 Gb/s
`USB_SPEED_SUPERPLUS = 4;`	10 Gb/s

USB transfer type USB_TRANSFER_TYPE_*

Values for bmAttributes (bits 1..0) in type TUSBEndpointDescriptor

`USB_TRANSFER_TYPE_CONTROL = 0;`
`USB_TRANSFER_TYPE_ISOCHRONOUS = 1;`
`USB_TRANSFER_TYPE_BULK = 2;`
`USB_TRANSFER_TYPE_INTERRUPT = 3;`
`USB_TRANSFER_TYPE_MASK = $03;`

USB transfer size USB_TRANSFER_SIZE_*

`USB_TRANSFER_SIZE_8_BIT = 0;`
`USB_TRANSFER_SIZE_16_BIT = 1;`
`USB_TRANSFER_SIZE_32_BIT = 2;`
`USB_TRANSFER_SIZE_64_BIT = 3;`

USB descriptor type USB_DESCRIPTOR_TYPE_*

See Table 9-5 in Section 9.4 of the USB 2.0 specification
Values for bDescriptorType in types TUSBDescriptorHeader and TUSBDeviceDescriptor

`USB_DESCRIPTOR_TYPE_DEVICE = 1;`
`USB_DESCRIPTOR_TYPE_CONFIGURATION = 2;`
`USB_DESCRIPTOR_TYPE_STRING = 3;`
`USB_DESCRIPTOR_TYPE_INTERFACE = 4;`
`USB_DESCRIPTOR_TYPE_ENDPOINT = 5;`
`USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER = 6;`
`USB_DESCRIPTOR_TYPE_OTHER_SPEED_CONFIGURATION = 7;`
`USB_DESCRIPTOR_TYPE_INTERFACE_POWER = 8;`
`USB_DESCRIPTOR_TYPE_CLASS_DEVICE = $21;`	(USB_REQUEST_TYPE_CLASS shl 5) or USB_DESCRIPTOR_TYPE_DEVICE (See USB Device Class Definition for Audio Devices Specification)
`USB_DESCRIPTOR_TYPE_CLASS_CONFIGURATION = $22;`	(USB_REQUEST_TYPE_CLASS shl 5) or USB_DESCRIPTOR_TYPE_CONFIGURATION
`USB_DESCRIPTOR_TYPE_CLASS_STRING = $23;`	(USB_REQUEST_TYPE_CLASS shl 5) or USB_DESCRIPTOR_TYPE_STRING
`USB_DESCRIPTOR_TYPE_CLASS_INTERFACE = $24;`	(USB_REQUEST_TYPE_CLASS shl 5) or USB_DESCRIPTOR_TYPE_INTERFACE
`USB_DESCRIPTOR_TYPE_CLASS_ENDPOINT = $25;`	(USB_REQUEST_TYPE_CLASS shl 5) or USB_DESCRIPTOR_TYPE_ENDPOINT
`USB_DESCRIPTOR_TYPE_HUB = $29;`

USB transfer direction USB_DIRECTION_*

See Table 9-2 of Section 9.3 of the USB 2.0 specification
Values for bmRequestType (bit 7) in type TUSBControlSetupData

`USB_DIRECTION_OUT = 0;`	Host to Device
`USB_DIRECTION_IN = 1;`	Device to Host

USB request type USB_REQUEST_TYPE_*

See Table 9-2 of Section 9.3 of the USB 2.0 specification
bits 6..5 of bmRequestType in type TUSBControlSetupData

`USB_REQUEST_TYPE_STANDARD = 0;`
`USB_REQUEST_TYPE_CLASS = 1;`
`USB_REQUEST_TYPE_VENDOR = 2;`
`USB_REQUEST_TYPE_RESERVED = 3;`

USB request recipient USB_REQUEST_RECIPIENT_*

See Table 9-2 of Section 9.3 of the USB 2.0 specification
bits 4..0 of bmRequestType in type TUSBControlSetupData

`USB_REQUEST_RECIPIENT_DEVICE = 0;`
`USB_REQUEST_RECIPIENT_INTERFACE = 1;`
`USB_REQUEST_RECIPIENT_ENDPOINT = 2;`
`USB_REQUEST_RECIPIENT_OTHER = 3;`

USB bmrequest type USB_BMREQUESTTYPE_*

See Table 9-2 of Section 9.3 of the USB 2.0 specification
Values of the bitfields within the bmRequestType member of TUSBControlSetupData

`USB_BMREQUESTTYPE_DIR_OUT = (USB_DIRECTION_OUT shl 7);`
`USB_BMREQUESTTYPE_DIR_IN = (USB_DIRECTION_IN shl 7);`
`USB_BMREQUESTTYPE_DIR_MASK = ($01 shl 7);`
`USB_BMREQUESTTYPE_TYPE_STANDARD = (USB_REQUEST_TYPE_STANDARD shl 5);`
`USB_BMREQUESTTYPE_TYPE_CLASS = (USB_REQUEST_TYPE_CLASS shl 5);`
`USB_BMREQUESTTYPE_TYPE_VENDOR = (USB_REQUEST_TYPE_VENDOR shl 5);`
`USB_BMREQUESTTYPE_TYPE_RESERVED = (USB_REQUEST_TYPE_RESERVED shl 5);`
`USB_BMREQUESTTYPE_TYPE_MASK = ($03 shl 5);`
`USB_BMREQUESTTYPE_RECIPIENT_DEVICE = (USB_REQUEST_RECIPIENT_DEVICE shl 0);`
`USB_BMREQUESTTYPE_RECIPIENT_INTERFACE = (USB_REQUEST_RECIPIENT_INTERFACE shl 0);`
`USB_BMREQUESTTYPE_RECIPIENT_ENDPOINT = (USB_REQUEST_RECIPIENT_ENDPOINT shl 0);`
`USB_BMREQUESTTYPE_RECIPIENT_OTHER = (USB_REQUEST_RECIPIENT_OTHER shl 0);`
`USB_BMREQUESTTYPE_RECIPIENT_MASK = ($1f shl 0);`

USB device request USB_DEVICE_REQUEST_*

See Table 9-3 in Section 9.4 of the USB 2.0 specification
Values for bRequest in type TUSBControlSetupData

`USB_DEVICE_REQUEST_GET_STATUS = 0;`
`USB_DEVICE_REQUEST_CLEAR_FEATURE = 1;`
`USB_DEVICE_REQUEST_SET_FEATURE = 3;`
`USB_DEVICE_REQUEST_SET_ADDRESS = 5;`
`USB_DEVICE_REQUEST_GET_DESCRIPTOR = 6;`
`USB_DEVICE_REQUEST_SET_DESCRIPTOR = 7;`
`USB_DEVICE_REQUEST_GET_CONFIGURATION = 8;`
`USB_DEVICE_REQUEST_SET_CONFIGURATION = 9;`
`USB_DEVICE_REQUEST_GET_INTERFACE = 10;`
`USB_DEVICE_REQUEST_SET_INTERFACE = 11;`
`USB_DEVICE_REQUEST_SYNCH_FRAME = 12;`

USB device feature USB_DEVICE_FEATURE_*

See Table 9-6 in Section 9.4 of the USB 2.0 specification
Values for wValue in type TUSBControlSetupData

`USB_DEVICE_FEATURE_ENDPOINT_HALT = 0;`	Endpoint Only
`USB_DEVICE_FEATURE_REMOTE_WAKEUP = 1;`	Device Only
`USB_DEVICE_FEATURE_TEST_MODE = 2;`	Device Only

USB test mode USB_DEVICE_TEST_MODE_*

See Table 9-7 in Section 9.4 of the USB 2.0 specification
Values for wIndex in type TUSBControlSetupData

`USB_DEVICE_TEST_MODE_J = $01;`
`USB_DEVICE_TEST_MODE_K = $02;`
`USB_DEVICE_TEST_MODE_SE0_NAK = $03;`
`USB_DEVICE_TEST_MODE_PACKET = $04;`
`USB_DEVICE_TEST_MODE_FORCE_ENABLE = $05;`

USB packet Id value USB_PACKETID_*

See ????????

`USB_PACKETID_UNDEF_0 = $f0;`
`USB_PACKETID_OUT = $e1;`
`USB_PACKETID_ACK = $d2;`
`USB_PACKETID_DATA0 = $c3;`
`USB_PACKETID_UNDEF_4 = $b4;`
`USB_PACKETID_SOF = $a5;`
`USB_PACKETID_UNDEF_6 = $96;`
`USB_PACKETID_UNDEF_7 = $87;`
`USB_PACKETID_UNDEF_8 = $78;`
`USB_PACKETID_IN = $69;`
`USB_PACKETID_NAK = $5a;`
`USB_PACKETID_DATA1 = $4b;`
`USB_PACKETID_PREAMBLE = $3c;`
`USB_PACKETID_SETUP = $2d;`
`USB_PACKETID_STALL = $1e;`
`USB_PACKETID_UNDEF_F = $0f;`

USB class code USB_CLASS_CODE_*

bDeviceClass/bInterfaceClass
See: https://www.usb.org/defined-class-codes
Note that only the hub class is defined in the USB 2.0 specification itself the other standard class codes are defined in additional specifications

`USB_CLASS_CODE_INTERFACE_SPECIFIC = $00;`	Use class code info from Interface Descriptors
`USB_CLASS_CODE_AUDIO = $01;`	Audio device
`USB_CLASS_CODE_COMMUNICATIONS_AND_CDC_CONTROL = $02;`	Communication device class
`USB_CLASS_CODE_COMMS = USB_CLASS_CODE_COMMUNICATIONS_AND_CDC_CONTROL;`
`USB_CLASS_CODE_HID = $03;`	HID device class
`USB_CLASS_CODE_PHYSICAL = $05;`	Physical device class
`USB_CLASS_CODE_IMAGE = $06;`	Still Imaging device
`USB_CLASS_CODE_PRINTER = $07;`	Printer device
`USB_CLASS_CODE_MASS_STORAGE = $08;`	Mass Storage device
`USB_CLASS_CODE_HUB = $09;`	Hub Device
`USB_CLASS_CODE_CDC_DATA = $0a;`	CDC data device
`USB_CLASS_CODE_SMART_CARD = $0b;`	Smart Card device
`USB_CLASS_CODE_CONTENT_SECURITY = $0d;`	Content Security device
`USB_CLASS_CODE_VIDEO = $0e;`	Video device
`USB_CLASS_CODE_PERSONAL_HEALTHCARE = $0f;`	Personal Healthcare device
`USB_CLASS_CODE_AUDIO_VIDEO = $10;`	Audio/Video Devices
`USB_CLASS_CODE_BILLBOARD = $11;`	Billboard Device
`USB_CLASS_CODE_DIAGNOSTIC = $DC;`	Diagnostic Device
`USB_CLASS_CODE_WIRELESS_CONTROLLER = $e0;`	Wireless Controller
`USB_CLASS_CODE_MISCELLANEOUS = $ef;`	Miscellaneous
`USB_CLASS_CODE_APPLICATION_SPECIFIC = $fe;`	Application Specific
`USB_CLASS_CODE_VENDOR_SPECIFIC = $ff;`	Vendor Specific

USB subclass code USB_SUBCLASS_*

bDeviceSubClass/bInterfaceSubClass
See: https://www.usb.org/defined-class-codes

Communications Devices
`USB_SUBCLASS_CDC_DLCM = $01;`	Direct Line Control Model (USBPSTN1.2)
`USB_SUBCLASS_CDC_ACM = $02;`	Abstract Control Model (USBPSTN1.2)
`USB_SUBCLASS_CDC_TCM = $03;`	Telephone Control Model (USBPSTN1.2)
`USB_SUBCLASS_CDC_MCCM = $04;`	Multi-Channel Control Model (USBISDN1.2)
`USB_SUBCLASS_CDC_CCM = $05;`	CAPI Control Model (USBISDN1.2)
`USB_SUBCLASS_CDC_ETHERNET = $06;`	Ethernet Networking Control Model (USBECM1.2)
`USB_SUBCLASS_CDC_WHCM = $08;`	Wireless Handset Control Model (USBWMC1.1)
`USB_SUBCLASS_CDC_DMM = $09;`	Device Management Model (USBWMC1.1)
`USB_SUBCLASS_CDC_MDLM = $0a;`	Mobile Direct Line Model (USBWMC1.1)
`USB_SUBCLASS_CDC_OBEX = $0b;`	OBEX (USBWMC1.1)
`USB_SUBCLASS_CDC_EEM = $0c;`	Ethernet Emulation Model (USBEEM1.0)
`USB_SUBCLASS_CDC_NCM = $0d;`	Network Control Model (USBNCM1.0)
`USB_SUBCLASS_CDC_MBIM = $0e;`
Still Image Devices
`USB_SUBCLASS_IMAGE_DEFAULT = $01;`
Mass Storage Devices
`USB_SUBCLASS_MASS_STORAGE_DEFAULT = $00;`	SCSI command set not reported, De facto use
`USB_SUBCLASS_MASS_STORAGE_RBC = $01;`	Reduced Block Commands (RBC), INCITS 330:2000, available at http://www.t10.org
`USB_SUBCLASS_MASS_STORAGE_MMC5 = $02;`	Multi-Media Command Set 5 (MMC-5), T10/1675-D available at http://www.t10.org
`USB_SUBCLASS_MASS_STORAGE_QIC157 = $03;`	Obsolete was QIC-157
`USB_SUBCLASS_MASS_STORAGE_UFI = $04;`	UFI Specifies how to interface Floppy Disk Drives to USB
`USB_SUBCLASS_MASS_STORAGE_SFF8070I = $05;`	Obsolete Was SFF-8070i
`USB_SUBCLASS_MASS_STORAGE_SCSI = $06;`	SCSI transparent command set
`USB_SUBCLASS_MASS_STORAGE_LSDFS = $07; {LSD FS }`
`USB_SUBCLASS_MASS_STORAGE_IEEE1667 = $08;`	IEEE 1667 Standard Protocol for Authentication in Host Attachments of Transient Storage Devices (IEEE 1667) available at www.ieee1667.com
`USB_SUBCLASS_MASS_STORAGE_VENDOR_SPECIFIC = $ff;`	Specific to device vendor, De facto use
Content Security Devices
`USB_SUBCLASS_CONTENT_SECURITY_DEFAULT = $00;`
Audio/Video Devices
`USB_SUBCLASS_AUDIO_VIDEO_CONTROL = $01;`	Audio/Video Device AVControl Interface
`USB_SUBCLASS_AUDIO_VIDEO_DATA_VIDEO = $02;`	Audio/Video Device AVData Video Streaming Interface
`USB_SUBCLASS_AUDIO_VIDEO_DATA_AUDIO = $03;`	Audio/Video Device AVData Audio Streaming Interface
Billboard Devices
`USB_SUBCLASS_BILLBOARD_DEFAULT = $00;`
Diagnostic Device
`USB_SUBCLASS_DIAGNOSTIC_DEFAULT = $01;`
Wireless Controller
`USB_SUBCLASS_WIRELESS_CONTROLLER_BLUETOOTH = $01;`
`USB_SUBCLASS_WIRELESS_CONTROLLER_USB = $02;`
Miscellaneous
`USB_SUBCLASS_MISCELLANEOUS_SYNC = $01;`
`USB_SUBCLASS_MISCELLANEOUS_IAD_WAMP = $02;`	Interface Association Descriptor/Wire Adapter Multifunction Peripheral
`USB_SUBCLASS_MISCELLANEOUS_CBAF = $03;`	Cable Based Association Framework
`USB_SUBCLASS_MISCELLANEOUS_RNDIS = $04;`
`USB_SUBCLASS_MISCELLANEOUS_USB3VISION = $05;`
Application Specific
`USB_SUBCLASS_APPLICATION_SPECIFIC_DFU = $01;`
`USB_SUBCLASS_APPLICATION_SPECIFIC_IRDA = $02;`
`USB_SUBCLASS_APPLICATION_SPECIFIC_TMC = $02;`
Vendor Specific
`USB_SUBCLASS_VENDOR_SPECIFIC = $ff;`	Vendor Specific

USB protocol code USB_PROTOCOL_*

bDeviceProtocol/bInterfaceProtocol
See: https://www.usb.org/defined-class-codes

Communications Devices
`USB_PROTOCOL_CDC_ACM_NONE = 0;`	Abstract Control Model - No class specific protocol required
`USB_PROTOCOL_CDC_ACM_AT_V25TER = 1;`	Abstract Control Model - AT Commands: V.250 etc
`USB_PROTOCOL_CDC_ACM_AT_PCCA101 = 2;`	Abstract Control Model - AT Commands defined by PCCA-101
`USB_PROTOCOL_CDC_ACM_AT_PCCA101_WAKE = 3;`	Abstract Control Model - AT Commands defined by PCCA-101 & Annex O
`USB_PROTOCOL_CDC_ACM_AT_GSM = 4;`	Abstract Control Model - AT Commands defined by GSM 07.07
`USB_PROTOCOL_CDC_ACM_AT_3G = 5;`	Abstract Control Model - AT Commands defined by 3GPP 27.007
`USB_PROTOCOL_CDC_ACM_AT_CDMA = 6;`	Abstract Control Model - AT Commands defined by TIA for CDMA
`USB_PROTOCOL_CDC_ACM_VENDOR = $ff;`	Abstract Control Model - Vendor-specific
`USB_PROTOCOL_CDC_EEM = 7;`	Ethernet Emulation Model
`USB_PROTOCOL_CDC_NCM_NTB = 1;`	Network Control Model - Network Transfer Block
`USB_PROTOCOL_CDC_MBIM_NTB = 2;`	Network Transfer Block
Still Image Devices
`USB_PROTOCOL_IMAGE_DEFAULT = $01;`
Mass Storage Devices
`USB_PROTOCOL_MASS_STORAGE_CBI = $00;`	CBI (with command completion interrupt) USB Mass Storage Class Control/Bulk/Interrupt Transport
`USB_PROTOCOL_MASS_STORAGE_CB = $01;`	CBI (with no command completion interrupt) USB Mass Storage Class Control/Bulk/Interrupt Transport
`USB_PROTOCOL_MASS_STORAGE_BBB = $50;`	BBB USB Mass Storage Class Bulk-Only Transport
`USB_PROTOCOL_MASS_STORAGE_UAS = $62;`	UAS
`USB_PROTOCOL_MASS_STORAGE_VENDOR_SPECIFIC = $ff;`	Specific to device vendor, De facto use
Hub Devices
`USB_PROTOCOL_HUB_FULLSPEED = $00;`	Full speed Hub
`USB_PROTOCOL_HUB_HIGHSPEED_SINGLE_TT = $01;`	Hi-speed hub with single Transaction Translator
`USB_PROTOCOL_HUB_HIGHSPEED_MULTI_TT = $02;`	Hi-speed hub with multiple Transaction Translators
Content Security Devices
`USB_PROTOCOL_CONTENT_SECURITY_DEFAULT = $00;`
Audio/Video Devices
`USB_PROTOCOL_AUDIO_VIDEO_DEFAULT = $00;`
Billboard Devices
`USB_PROTOCOL_BILLBOARD_DEFAULT = $00;`
Diagnostic Device
`USB_PROTOCOL_DIAGNOSTIC_DEFAULT = $01;`
Wireless Controller
`USB_PROTOCOL_WIRELESS_CONTROLLER_BLUETOOTH = $01;`	See: http://www.bluetooth.com/
`USB_PROTOCOL_WIRELESS_CONTROLLER_UWB = $02;`	See: Wireless USB Specification in Chapter 8
`USB_PROTOCOL_WIRELESS_CONTROLLER_NDIS = $03;`	See: http://www.microsoft.com/windowsmobile/mobileoperators/default.mspx
`USB_PROTOCOL_WIRELESS_CONTROLLER_BLUETOOTH_AMP = $04;`	See: http://www.bluetooth.com/
`USB_PROTOCOL_WIRELESS_CONTROLLER_USB_HOST = $01;`	Host Wire Adapter Control/Data interface. Definition can be found in the Wireless USB Specification in Chapter 8
`USB_PROTOCOL_WIRELESS_CONTROLLER_USB_DEVICE = $02;`	Device Wire Adapter Control/Data interface. Definition can be found in the Wireless USB Specification in Chapter 8
`USB_PROTOCOL_WIRELESS_CONTROLLER_USB_DEVOCE_ISOC = $03;`	Device Wire Adapter Isochronous interface. Definition can be found in the Wireless USB Specification in Chapter 8
Miscellaneous
`USB_PROTOCOL_MISCELLANEOUS_ACTIVESYNC = $01;`	Active Sync device
`USB_PROTOCOL_MISCELLANEOUS_PALMSYNC = $02;`	Palm Sync
`USB_PROTOCOL_MISCELLANEOUS_IAD = $01;`	Interface Association Descriptor. The usage of this class code triple is defined in the Interface Association Descriptor ECN
`USB_PROTOCOL_MISCELLANEOUS_WAMP = $02;`	Wire Adapter Multifunction Peripheral programming interface. Definition can be found in the Wireless USB Specification in Chapter 8.
`USB_PROTOCOL_MISCELLANEOUS_CBAF = $01;`	Cable Based Association Framework. This is defined in the Association Model addendum to the Wireless USB specification.
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_ETHERNET = $01;`	RNDIS over Ethernet
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_WIFI = $02;`	RNDIS over WiFi
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_WIMAX = $03;`	RNDIS over WiMAX
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_WWAN = $04;`	RNDIS over WWAN
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_IPV4 = $05;`	RNDIS for Raw IPv4
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_IPV6 = $06;`	RNDIS for Raw IPv6
`USB_PROTOCOL_MISCELLANEOUS_RNDIS_GPRS = $07;`	RNDIS for GPRS
`USB_PROTOCOL_MISCELLANEOUS_USB3VISION_CONTROL = $00;`	USB3 Vision Control Interface
`USB_PROTOCOL_MISCELLANEOUS_USB3VISION_EVENT = $01;`	USB3 Vision Event Interface
`USB_PROTOCOL_MISCELLANEOUS_USB3VISION_STREAM = $02;`	USB3 Vision Streaming Interface
Application Specific
`USB_PROTOCOL_APPLICATION_SPECIFIC_DFU_DEFAULT = $01;`	Device Firmware Upgrade
`USB_PROTOCOL_APPLICATION_SPECIFIC_IRDA_DEFAULT = $00;`	IRDA Bridge device
`USB_PROTOCOL_APPLICATION_SPECIFIC_TMC_DEFAULT = $00;`	USB Test and Measurement Device
`USB_PROTOCOL_APPLICATION_SPECIFIC_TMC_488 = $01;`	USB Test and Measurement Device conforming to the USBTMC USB488 Subclass Specification

USB primary language Id USB_LANG_*

See Language Identifiers supplement to the USB 2.0 specification
These are the first 10 bits of the 16-bit language identifier

Reserved $00
`USB_LANG_ARABIC = $01;`	Arabic
`USB_LANG_BULGARIAN = $02;`	Bulgarian
`USB_LANG_CATALAN = $03;`	Catalan
`USB_LANG_CHINESE = $04;`	Chinese
`USB_LANG_CZECH = $05;`	Czech
`USB_LANG_DANISH = $06;`	Danish
`USB_LANG_GERMAN = $07;`	German
`USB_LANG_GREEK = $08;`	Greek
`USB_LANG_ENGLISH = $09;`	English
`USB_LANG_SPANISH = $0a;`	Spanish
`USB_LANG_FINNISH = $0b;`	Finnish
`USB_LANG_FRENCH = $0c;`	French
`USB_LANG_HEBREW = $0d;`	Hebrew
`USB_LANG_HUNGARIAN = $0e;`	Hungarian
`USB_LANG_ICELANDIC = $0f;`	Icelandic
`USB_LANG_ITALIAN = $10;`	Italian
`USB_LANG_JAPANESE = $11;`	Japanese
`USB_LANG_KOREAN = $12;`	Korean
`USB_LANG_DUTCH = $13;`	Dutch
`USB_LANG_NORWEGIAN = $14;`	Norwegian
`USB_LANG_POLISH = $15;`	Polish
`USB_LANG_PORTUGUESE = $16;`	Portuguese
`USB_LANG_ROMANIAN = $18;`	Romanian
`USB_LANG_RUSSIAN = $19;`	Russian
`USB_LANG_CROATIAN = $1a;`	Croatian
`USB_LANG_SERBIAN = $1a;`	Serbian
`USB_LANG_SLOVAK = $1b;`	Slovak
`USB_LANG_ALBANIAN = $1c;`	Albanian
`USB_LANG_SWEDISH = $1d;`	Swedish
`USB_LANG_THAI = $1e;`	Thai
`USB_LANG_TURKISH = $1f;`	Turkish
`USB_LANG_URDU = $20;`	Urdu
`USB_LANG_INDONESIAN = $21;`	Indonesian
`USB_LANG_UKRANIAN = $22;`	Ukrainian
`USB_LANG_BELARUSIAN = $23;`	Belarusian
`USB_LANG_SLOVENIAN = $24;`	Slovenian
`USB_LANG_ESTONIAN = $25;`	Estonian
`USB_LANG_LATVIAN = $26;`	Latvian
`USB_LANG_LITHUANIAN = $27;`	Lithuanian
`USB_LANG_FARSI = $29;`	Farsi
`USB_LANG_VIETNAMESE = $2a;`	Vietnamese
`USB_LANG_ARMENIAN = $2b;`	Armenian
`USB_LANG_AZERI = $2c;`	Azeri
`USB_LANG_BASQUE = $2d;`	Basque
`USB_LANG_MACEDONIAN = $2f;`	Macedonian
`USB_LANG_AFRIKAANS = $36;`	Afrikaans
`USB_LANG_GEORGIAN = $37;`	Georgian
`USB_LANG_FAEROESE = $38;`	Faeroese
`USB_LANG_HINDI = $39;`	Hindi
`USB_LANG_MALAY = $3e;`	Malay
`USB_LANG_KAZAK = $3f;`	Kazak
`USB_LANG_SWAHILI = $41;`	Swahili
`USB_LANG_UZBEK = $43;`	Uzbek
`USB_LANG_TATAR = $44;`	Tatar
`USB_LANG_BENGALI = $45;`	Bengali
`USB_LANG_PUNJABI = $46;`	Punjabi
`USB_LANG_GUJARATI = $47;`	Gujarati
`USB_LANG_ORIYA = $48;`	Oriya
`USB_LANG_TAMIL = $49;`	Tamil
`USB_LANG_TELUGU = $4a;`	Telugu
`USB_LANG_KANNADA = $4b;`	Kannada
`USB_LANG_MALAYALAM = $4c;`	Malayalam
`USB_LANG_ASSAMESE = $4d;`	Assamese
`USB_LANG_MARATHI = $4e;`	Marathi
`USB_LANG_SANSKRIT = $4f;`	Sanskrit
`USB_LANG_KONKANI = $57;`	Konkani
`USB_LANG_MANIPURI = $58;`	Manipuri
`USB_LANG_SINDHI = $59;`	Sindhi
`USB_LANG_KASHMIRI = $60;`	Kashmiri
`USB_LANG_NEPALI = $61;`	Nepali
Reserved $62-$fe
`USB_LANG_HID = $ff;`	Reserved for USB HID Class use
Reserved $100-$3ff
`USB_PRIMARY_LANGUAGE_MASK = $3ff;`

USB sublanguage Id USB_SUBLANG_*

See Language Identifiers supplement to the USB 2.0 specification
These are the upper 6 bits of the 16-bit language identifier

Reserved $00-$02
`USB_SUBLANG_ARABIC_SAUDI_ARABIA = $01;`	Arabic (Saudi Arabia)
`USB_SUBLANG_ARABIC_IRAQ = $02;`	Arabic (Iraq)
`USB_SUBLANG_ARABIC_EGYPT = $03;`	Arabic (Egypt)
`USB_SUBLANG_ARABIC_LIBYA = $04;`	Arabic (Libya)
`USB_SUBLANG_ARABIC_ALGERIA = $05;`	Arabic (Algeria)
`USB_SUBLANG_ARABIC_MOROCCO = $06;`	Arabic (Morocco)
`USB_SUBLANG_ARABIC_TUNISIA = $07;`	Arabic (Tunisia)
`USB_SUBLANG_ARABIC_OMAN = $08;`	Arabic (Oman)
`USB_SUBLANG_ARABIC_YEMEN = $09;`	Arabic (Yemen)
`USB_SUBLANG_ARABIC_SYRIA = $10;`	Arabic (Syria)
`USB_SUBLANG_ARABIC_JORDAN = $11;`	Arabic (Jordan)
`USB_SUBLANG_ARABIC_LEBANON = $12;`	Arabic (Lebanon)
`USB_SUBLANG_ARABIC_KUWAIT = $13;`	Arabic (Kuwait)
`USB_SUBLANG_ARABIC_UAE = $14;`	Arabic (U.A.E.)
`USB_SUBLANG_ARABIC_BAHRAIN = $15;`	Arabic (Bahrain)
`USB_SUBLANG_ARABIC_QATAR = $16;`	Arabic (Qatar)
`USB_SUBLANG_AZERI_CYRILLIC = $01;`	Azeri (Cyrillic)
`USB_SUBLANG_AZERI_LATIN = $02;`	Azeri (Latin)
`USB_SUBLANG_CHINESE_TRADITIONAL = $01;`	Chinese (Traditional)
`USB_SUBLANG_CHINESE_SIMPLIFIED = $02;`	Chinese (Simplified)
`USB_SUBLANG_CHINESE_HONGKONG = $03;`	Chinese (Hong Kong SAR, PRC)
`USB_SUBLANG_CHINESE_SINGAPORE = $04;`	Chinese (Singapore)
`USB_SUBLANG_CHINESE_MACAU = $05;`	Chinese (Macau SAR)
`USB_SUBLANG_DUTCH = $01;`	Dutch
`USB_SUBLANG_DUTCH_BELGIAN = $02;`	Dutch (Belgian)
`USB_SUBLANG_ENGLISH_US = $01;`	English (US)
`USB_SUBLANG_ENGLISH_UK = $02;`	English (UK)
`USB_SUBLANG_ENGLISH_AUS = $03;`	English (Australian)
`USB_SUBLANG_ENGLISH_CAN = $04;`	English (Canadian)
`USB_SUBLANG_ENGLISH_NZ = $05;`	English (New Zealand)
`USB_SUBLANG_ENGLISH_EIRE = $06;`	English (Ireland)
`USB_SUBLANG_ENGLISH_SOUTH_AFRICA = $07;`	English (South Africa)
`USB_SUBLANG_ENGLISH_JAMAICA = $08;`	English (Jamaica)
`USB_SUBLANG_ENGLISH_CARIBBEAN = $09;`	English (Caribbean)
`USB_SUBLANG_ENGLISH_BELIZE = $0a;`	English (Belize)
`USB_SUBLANG_ENGLISH_TRINIDAD = $0b;`	English (Trinidad)
`USB_SUBLANG_ENGLISH_PHILIPPINES = $0c;`	English (Zimbabwe)
`USB_SUBLANG_ENGLISH_ZIMBABWE = $0d;`	English (Philippines)
`USB_SUBLANG_FRENCH = $01;`	French
`USB_SUBLANG_FRENCH_BELGIAN = $02;`	French (Belgian)
`USB_SUBLANG_FRENCH_CANADIAN = $03;`	French (Canadian)
`USB_SUBLANG_FRENCH_SWISS = $04;`	French (Swiss)
`USB_SUBLANG_FRENCH_LUXEMBOURG = $05;`	French (Luxembourg)
`USB_SUBLANG_FRENCH_MONACO = $06;`	French (Monaco)
`USB_SUBLANG_GERMAN = $01;`	German
`USB_SUBLANG_GERMAN_SWISS = $02;`	German (Swiss)
`USB_SUBLANG_GERMAN_AUSTRIAN = $03;`	German (Austrian)
`USB_SUBLANG_GERMAN_LUXEMBOURG = $04;`	German (Luxembourg)
`USB_SUBLANG_GERMAN_LIECHTENSTEIN = $05;`	German (Liechtenstein)
`USB_SUBLANG_ITALIAN = $01;`	Italian
`USB_SUBLANG_ITALIAN_SWISS = $02;`	Italian (Swiss)
`USB_SUBLANG_KASHMIRI_INDIA = $02;`	Kashmiri (India)
`USB_SUBLANG_KOREAN = $01;`	Korean
`USB_SUBLANG_LITHUANIAN = $01;`	Lithuanian
`USB_SUBLANG_MALAY_MALAYSIA = $01;`	Malay (Malaysia)
`USB_SUBLANG_MALAY_BRUNEI_DARUSSALAM = $02;`	Malay (Brunei Darassalam)
`USB_SUBLANG_NEPALI_INDIA = $02;`	Nepali (India)
`USB_SUBLANG_NORWEGIAN_BOKMAL = $01;`	Norwegian (Bokmal)
`USB_SUBLANG_NORWEGIAN_NYNORSK = $02;`	Norwegian (Nynorsk)
`USB_SUBLANG_PORTUGUESE = $01;`	Portuguese (Brazilian)
`USB_SUBLANG_PORTUGUESE_BRAZILIAN = $02;`	Portuguese
`USB_SUBLANG_SERBIAN_LATIN = $02;`	Serbian (Latin)
`USB_SUBLANG_SERBIAN_CYRILLIC = $03;`	Serbian (Cyrillic)
`USB_SUBLANG_SPANISH = $01;`	Spanish (Castilian)
`USB_SUBLANG_SPANISH_MEXICAN = $02;`	Spanish (Mexican)
`USB_SUBLANG_SPANISH_MODERN = $03;`	Spanish (Modern)
`USB_SUBLANG_SPANISH_GUATEMALA = $04;`	Spanish (Guatemala)
`USB_SUBLANG_SPANISH_COSTA_RICA = $05;`	Spanish (Costa Rica)
`USB_SUBLANG_SPANISH_PANAMA = $06;`	Spanish (Panama)
`USB_SUBLANG_SPANISH_DOMINICAN_REPUBLIC = $07;`	Spanish (Dominican Republic)
`USB_SUBLANG_SPANISH_VENEZUELA = $08;`	Spanish (Venezuela)
`USB_SUBLANG_SPANISH_COLOMBIA = $09;`	Spanish (Colombia)
`USB_SUBLANG_SPANISH_PERU = $0a;`	Spanish (Peru)
`USB_SUBLANG_SPANISH_ARGENTINA = $0b;`	Spanish (Argentina)
`USB_SUBLANG_SPANISH_ECUADOR = $0c;`	Spanish (Ecuador)
`USB_SUBLANG_SPANISH_CHILE = $0d;`	Spanish (Chile)
`USB_SUBLANG_SPANISH_URUGUAY = $0e;`	Spanish (Uruguay)
`USB_SUBLANG_SPANISH_PARAGUAY = $0f;`	Spanish (Paraguay)
`USB_SUBLANG_SPANISH_BOLIVIA = $10;`	Spanish (Bolivia)
`USB_SUBLANG_SPANISH_EL_SALVADOR = $11;`	Spanish (El Salvador)
`USB_SUBLANG_SPANISH_HONDURAS = $12;`	Spanish (Honduras)
`USB_SUBLANG_SPANISH_NICARAGUA = $13;`	Spanish (Nicaragua)
`USB_SUBLANG_SPANISH_PUERTO_RICO = $14;`	Spanish (Puerto Rico)
`USB_SUBLANG_SWEDISH = $01;`	Swedish
`USB_SUBLANG_SWEDISH_FINLAND = $02;`	Swedish (Finland)
`USB_SUBLANG_URDU_PAKISTAN = $01;`	Urdu (Pakistan)
`USB_SUBLANG_URDU_INDIA = $02;`	Urdu (India)
`USB_SUBLANG_UZBEK_LATIN = $01;`	Uzbek (Latin)
`USB_SUBLANG_UZBEK_CYRILLIC = $02;`	Uzbek (Cyrillic)
`USB_SUBLANG_HID_USAGE_DATA_DESCRIPTOR = $01;`	HID (Usage Data Descriptor)
`USB_SUBLANG_HID_VENDOR_DEFINED_1 = $3c;`	HID (Vendor Defined 1)
`USB_SUBLANG_HID_VENDOR_DEFINED_2 = $3d;`	HID (Vendor Defined 2)
`USB_SUBLANG_HID_VENDOR_DEFINED_3 = $3e;`	HID (Vendor Defined 3)
`USB_SUBLANG_HID_VENDOR_DEFINED_4 = $3f;`	HID (Vendor Defined 4)

USB primary language identifier USB_LANGID_*

See Language Identifiers supplement to the USB 2.0 specification

`USB_LANGID_US_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_US shl 10));`	English (US)
`USB_LANGID_UK_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_UK shl 10));`	English (UK)
`USB_LANGID_AUS_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_AUS shl 10));`	English (Australian)
`USB_LANGID_CAN_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_CAN shl 10));`	English (Canadian)
`USB_LANGID_NZ_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_NZ shl 10));`	English (New Zealand)
`USB_LANGID_EIRE_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_EIRE shl 10));`	English (Ireland)
`USB_LANGID_SOUTH_AFRICA_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_SOUTH_AFRICA shl 10));`	English (South Africa)
`USB_LANGID_JAMAICA_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_JAMAICA shl 10));`	English (Jamaica)
`USB_LANGID_CARIBBEAN_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_CARIBBEAN shl 10));`	English (Caribbean)
`USB_LANGID_BELIZE_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_BELIZE shl 10));`	English (Belize)
`USB_LANGID_TRINIDAD_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_TRINIDAD shl 10));`	English (Trinidad)
`USB_LANGID_PHILIPPINES_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_PHILIPPINES shl 10));`	English (Philippines)
`USB_LANGID_ZIMBABWE_ENGLISH = (USB_LANG_ENGLISH or (USB_SUBLANG_ENGLISH_ZIMBABWE shl 10));`	English (Zimbabwe)

`USB_LANGID_USAGE_HID = (USB_LANG_HID or (USB_SUBLANG_HID_USAGE_DATA_DESCRIPTOR shl 10));`
`USB_LANGID_VENDOR1_HID = (USB_LANG_HID or (USB_SUBLANG_HID_VENDOR_DEFINED_1 shl 10));`
`USB_LANGID_VENDOR2_HID = (USB_LANG_HID or (USB_SUBLANG_HID_VENDOR_DEFINED_2 shl 10));`
`USB_LANGID_VENDOR3_HID = (USB_LANG_HID or (USB_SUBLANG_HID_VENDOR_DEFINED_3 shl 10));`
`USB_LANGID_VENDOR4_HID = (USB_LANG_HID or (USB_SUBLANG_HID_VENDOR_DEFINED_4 shl 10));`

USB vendor Id USB_VENDORID_*

`USB_VENDORID_REALTEK = $0BDA;`	Realtek

USB tree output USB_TREE_*

`USB_TREE_SPACES_PER_LEVEL = 6;`
`USB_TREE_LINES_PER_PORT = 2;`

USB logging USB_LOG_*

`USB_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;`	USB debugging messages
`USB_LOG_LEVEL_INFO = LOG_LEVEL_INFO;`	USB informational messages, such as a device being attached or detached
`USB_LOG_LEVEL_WARN = LOG_LEVEL_WARN;`	USB warning messages
`USB_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;`	USB error messages
`USB_LOG_LEVEL_NONE = LOG_LEVEL_NONE;`	No USB messages

USB hub specific constants USB_HUB_*

`USB_HUB_PREFIX = 'USBHub';`	Name prefix for USB Hubs

USB hub type USBHUB_TYPE_*

`USBHUB_TYPE_NONE = 0;`

`USBHUB_TYPE_MAX = 0;`

USB hub type name USBHUB_TYPE_NAMES*

`USBHUB_TYPE_NAMES:array[USBHUB_TYPE_NONE..USBHUB_TYPE_MAX] of String = (`
`'USBHUB_TYPE_NONE');`

USB hub state USBHUB_STATE_*

`USBHUB_STATE_DETACHED = 0;`
`USBHUB_STATE_DETACHING = 1;`
`USBHUB_STATE_ATTACHING = 2;`
`USBHUB_STATE_ATTACHED = 3;`

`USBHUB_STATE_MAX = 3;`

USB hub state name USBHUB_STATE_NAMES*

`USBHUB_STATE_NAMES:array[USBHUB_STATE_DETACHED..USBHUB_STATE_MAX] of String = (`
`'USBHUB_STATE_DETACHED',`
`'USBHUB_STATE_DETACHING',`
`'USBHUB_STATE_ATTACHING',`
`'USBHUB_STATE_ATTACHED');`

USB hub flag USBHUB_FLAG_*

`USBHUB_FLAG_NONE = $00000000;`
`USBHUB_FLAG_COMPOUND = $00000001;`	The Hub is part of a compound device
`USBHUB_FLAG_PORT_POWER = $00000002;`	The Hub supports per port power switching
`USBHUB_FLAG_PORT_PROTECTION = $00000004;`	The Hub supports per port over current protection
`USBHUB_FLAG_MULTI_TRANSLATOR = $00000008;`	The Hub includes multiple transaction translators (1 per port)

USB hub thread USBHUB_THREAD_*

`USBHUB_THREAD_STACK_SIZE = SIZE_32K;`	Stack size of USB hub thread
`USBHUB_THREAD_PRIORITY = THREAD_PRIORITY_HIGHEST;`	Priority of USB hub thread
`USBHUB_THREAD_NAME = 'USB Hub';`	Name of USB hub thread

USB device USBHUB_DEVICE_*

`USBHUB_DEVICE_DESCRIPTION = 'USB Hub';`	Description of USB hub device

USB hub driver USBHUB_DRIVER_*

`USBHUB_DRIVER_NAME = 'USB Hub Driver';`	Name of USB hub driver

USB port reset USB_PORT_RESET_*

`USB_PORT_RESET_TIMEOUT = 500;`	Maximum milliseconds to wait for a port to reset (500 is the same value that Linux uses)
`USB_PORT_RESET_RECOVERY = 30;`	Milliseconds to wait after port reset to allow the device attached to the port to recover before any data transfers (USB 2.0 spec says 10ms)
`USB_PORT_SHORT_RESET_DELAY = 10;`	Milliseconds between each status check on the port while waiting for it to finish being reset (Linux uses 10ms as the default value)
`USB_PORT_LONG_RESET_DELAY = 200;`	Milliseconds between each status check on the port while waiting for it to finish being reset (Linux uses 200ms for Low Speed devices)
`USB_PORT_ROOT_RESET_DELAY = 60;`	Milliseconds between each status check on the port while waiting for it to finish being reset (Linux uses 60ms for Root hub ports)

`USB_ATTACH_DEBOUNCE_INTERVAL = 100;`	Milliseconds to wait after attachment for debounce (TATTDB)
`USB_ADDRESS_COMPLETION_TIME = 50;`	Milliseconds to wait for set address completion (TDSETADDR)

USB hub characteristic USB_HUB_CHARACTERISTIC_*

Values for wHubCharacteristics in type TUSBHubDescriptor
See Table 11-13 in Section 11.23.2.1 of the USB 2.0 specification

`USB_HUB_CHARACTERISTIC_LPSM = (3 shl 0);`	Logical Power Switching Mode
`USB_HUB_CHARACTERISTIC_LPSM_GANGED = (0 shl 0);`	Ganged power switching (all ports power at once)
`USB_HUB_CHARACTERISTIC_LPSM_PORT = (1 shl 0);`	Individual port power switching
`USB_HUB_CHARACTERISTIC_IS_COMPOUND_DEVICE = (1 shl 2);`	Identifies a Compound Device (0 = Hub is not part of a compound device / 1 = Hub is part of a compound device)
`USB_HUB_CHARACTERISTIC_OCPM = (3 shl 3);`	Over-current Protection Mode
`USB_HUB_CHARACTERISTIC_OCPM_GLOBAL = (0 shl 3);`	Global Over-current Protection
`USB_HUB_CHARACTERISTIC_OCPM_PORT = (1 shl 3);`	Individual Port Over-current Protection
`USB_HUB_CHARACTERISTIC_OCPM_NONE = (2 shl 3);`	No Over-current Protection
`USB_HUB_CHARACTERISTIC_TTTT = (3 shl 5);`	TT Think Time
`USB_HUB_CHARACTERISTIC_TTTT_8 = (0 shl 5);`	TT requires at most 8 FS bit times of inter transaction gap
`USB_HUB_CHARACTERISTIC_TTTT_16 = (1 shl 5);`	TT requires at most 16 FS bit times of inter transaction gap
`USB_HUB_CHARACTERISTIC_TTTT_24 = (2 shl 5);`	TT requires at most 24 FS bit times of inter transaction gap
`USB_HUB_CHARACTERISTIC_TTTT_32 = (3 shl 5);`	TT requires at most 32 FS bit times of inter transaction gap
`USB_HUB_CHARACTERISTIC_PORT_INDICATOR = (1 shl 7);`	Port Indicators Supported (0 = Port Indicators are not supported / 1 = Port Indicators are supported)

USB hub feature USB_C_HUB_*

See Table 11-17 in Section 11.24.2 of the USB 2.0 specification

`USB_C_HUB_LOCAL_POWER = 0;`
`USB_C_HUB_OVER_CURRENT = 1;`

USB port feature USB_PORT_*

See Table 11-17 in Section 11.24.2 of the USB 2.0 specification

`USB_PORT_CONNECTION = 0;`
`USB_PORT_ENABLE = 1;`
`USB_PORT_SUSPEND = 2;`
`USB_PORT_OVER_CURRENT = 3;`
`USB_PORT_RESET = 4;`
`USB_PORT_POWER = 8;`
`USB_PORT_LOW_SPEED = 9;`
`USB_C_PORT_CONNECTION = 16;`
`USB_C_PORT_ENABLE = 17;`
`USB_C_PORT_SUSPEND = 18;`
`USB_C_PORT_OVER_CURRENT = 19;`
`USB_C_PORT_RESET = 20;`
`USB_PORT_TEST = 21;`
`USB_PORT_INDICATOR = 22;`

USB hub class request USB_HUB_REQUEST_*

See Table 11-16 in Section 11.24.2 of the USB 2.0 specification

`USB_HUB_REQUEST_GET_STATUS = 0;`
`USB_HUB_REQUEST_CLEAR_FEATURE = 1;`
`USB_HUB_REQUEST_SET_FEATURE = 3;`
`USB_HUB_REQUEST_GET_DESCRIPTOR = 6;`
`USB_HUB_REQUEST_SET_DESCRIPTOR = 7;`
`USB_HUB_REQUEST_CLEAR_TT_BUFFER = 8;`
`USB_HUB_REQUEST_RESET_TT = 9;`
`USB_HUB_REQUEST_GET_TT_STATE = 10;`
`USB_HUB_REQUEST_STOP_TT = 11;`

USB port status USB_PORT_STATUS_*

See Table 11-21 in Section 11.24.2.7.1 of the USB 2.0 specification
Values for wPortStatus in type TUSBPortStatus

`USB_PORT_STATUS_CONNNECTED = (1 shl 0);`
`USB_PORT_STATUS_ENABLED = (1 shl 1);`
`USB_PORT_STATUS_SUSPENDED = (1 shl 2);`
`USB_PORT_STATUS_OVERCURRENT = (1 shl 3);`
`USB_PORT_STATUS_RESET = (1 shl 4);`
`USB_PORT_STATUS_POWERED = (1 shl 8);`
`USB_PORT_STATUS_LOW_SPEED_ATTACHED = (1 shl 9);`
`USB_PORT_STATUS_HIGH_SPEED_ATTACHED = (1 shl 10);`
`USB_PORT_STATUS_TEST_MODE = (1 shl 11);`
`USB_PORT_STATUS_INDICATOR_CONTROL = (1 shl 12);`

USB port change USB_PORT_CHANGE_*

See Table 11-20 in Section 11.24.2.6 of the USB 2.0 specification
Values for wPortChange in type TUSBPortStatus

`USB_PORT_CHANGE_CONNECTED = (1 shl 0);`
`USB_PORT_CHANGE_ENABLED = (1 shl 1);`
`USB_PORT_CHANGE_SUSPENDED = (1 shl 2);`
`USB_PORT_CHANGE_OVERCURRENT = (1 shl 3);`
`USB_PORT_CHANGE_RESET = (1 shl 4);`

USB hub status USB_HUB_STATUS_*

See Table 11-19 in Section 11.24.2.6 of the USB 2.0 specification
Values for wHubStatus in type TUSBHubStatus

`USB_HUB_STATUS_LOCAL_POWER = (1 shl 0);`
`USB_HUB_STATUS_OVERCURRENT = (1 shl 1);`

USB hub change USB_HUB_CHANGE_*

See Table 11-20 in Section 11.24.2.6 of the USB 2.0 specification
Values for wHubChange in type TUSBHubStatus

`USB_HUB_CHANGE_LOCAL_POWER = (1 shl 0);`
`USB_HUB_CHANGE_OVERCURRENT = (1 shl 1);`

Type definitions

USB device Id

PUSBDeviceId = ^TUSBDeviceId;

TUSBDeviceId = record

Note: USB Device Id record for driver device identification (Not part of USB specification)
`idVendor:Word;`
`idProduct:Word;`

USB interface Id

PUSBInterfaceId = ^TUSBInterfaceId;

TUSBInterfaceId = record

Note: USB Interface Id record for driver device identification (Not part of USB specification)
`bInterfaceClass:Byte;`
`bInterfaceSubClass:Byte;`
`bInterfaceProtocol:Byte;`

USB device and interface Id

PUSBDeviceAndInterfaceId = ^TUSBDeviceAndInterfaceId;

TUSBDeviceAndInterfaceId = record

Note: USB Device and Interface Id record for driver device identification (Not part of USB specification)
`idVendor:Word;`
`idProduct:Word;`
`bInterfaceClass:Byte;`
`bInterfaceSubClass:Byte;`
`bInterfaceProtocol:Byte;`

USB device and interface no

PUSBDeviceAndInterfaceNo = ^TUSBDeviceAndInterfaceNo;

TUSBDeviceAndInterfaceNo = record

Note: USB Device and Interface No record for driver device identification (Not part of USB specification)
`idVendor:Word;`
`idProduct:Word;`
`bInterfaceNumber:Byte;`

USB control setup data

PUSBControlSetupData = ^TUSBControlSetupData;

TUSBControlSetupData = packed record

Note: See Table 9-2 in Section 9.3 of the USB 2.0 specification
`bmRequestType:Byte;`
`bRequest:Byte;`
`wValue:Word;`
`wIndex:Word;`
`wLength:Word;`

USB descriptor header

PUSBDescriptorHeader = ^TUSBDescriptorHeader;

TUSBDescriptorHeader = packed record

Note: See Table 9-8 in 9.6.1 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`

USB device descriptor

PUSBDeviceDescriptor = ^TUSBDeviceDescriptor;

TUSBDeviceDescriptor = packed record

Note: See Table 9-8 in 9.6.1 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`
`bcdUSB:Word;`
`bDeviceClass:Byte;`
`bDeviceSubClass:Byte;`
`bDeviceProtocol:Byte;`
`bMaxPacketSize0:Byte;`
`idVendor:Word;`
`idProduct:Word;`
`bcdDevice:Word;`
`iManufacturer:Byte;`
`iProduct:Byte;`
`iSerialNumber:Byte;`
`bNumConfigurations:Byte;`

USB configuration descriptor

PUSBConfigurationDescriptor = ^TUSBConfigurationDescriptor;

TUSBConfigurationDescriptor = packed record

Note: See Table 9-10 in Section 9.6.3 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`
`wTotalLength:Word;`
`bNumInterfaces:Byte;`
`bConfigurationValue:Byte;`
`iConfiguration:Byte;`
`bmAttributes:Byte;`
`bMaxPower:Byte;`

USB interface descriptor

PUSBInterfaceDescriptor = ^TUSBInterfaceDescriptor;

TUSBInterfaceDescriptor = packed record

Note: See Table 9-12 in Section 9.6.6 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`
`bInterfaceNumber:Byte;`
`bAlternateSetting:Byte;`
`bNumEndpoints:Byte;`
`bInterfaceClass:Byte;`
`bInterfaceSubClass:Byte;`
`bInterfaceProtocol:Byte;`
`iInterface:Byte;`

USB endpoint descriptor

PUSBEndpointDescriptor = ^TUSBEndpointDescriptor;

TUSBEndpointDescriptor = packed record

Note: See Table 9-13 in Section 9.6.6 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`
`bEndpointAddress:Byte;`
`bmAttributes:Byte;`
`wMaxPacketSize:Word;`
`bInterval:Byte;`

USB string descriptor

PUSBStringDescriptor = ^TUSBStringDescriptor;

TUSBStringDescriptor = packed record

Note: See Table 9-16 in Section 9.7 of the USB 2.0 specification
`bLength:Byte;`
`bDescriptorType:Byte;`
`bString:array[0..0] of Word;`	UTF-16LE encoded string (specification says "UNICODE")

USB string descriptor string

PUSBStringDescriptorString = ^TUSBStringDescriptorString;

TUSBStringDescriptorString = array[0..125] of Word;

Note: Array type to allow typecasting of bString element in TUSBStringDescriptor (Maximum size of descriptor is 255) (126 x 2 + 2 = 254)

USB string descriptor LANGIDs

PUSBStringDescriptorLANGIDs = ^TUSBStringDescriptorLANGIDs;

TUSBStringDescriptorLANGIDs = array[0..125] of Word;

Note: Array type to allow typecasting of bString element in TUSBStringDescriptor (Maximum size of descriptor is 255) (126 x 2 + 2 = 254)

USB device status

PUSBDeviceStatus = ^TUSBDeviceStatus;

TUSBDeviceStatus = packed record

Note: Device status information returned by a USB_DEVICE_REQUEST_GET_STATUS control message (See Section 9.4.6 of the USB 2.0 specification)
`wStatus:Word;`

USB device bind callback

`TUSBDeviceBind = function(Device:PUSBDevice):LongWord;`

USB device unbind callback

`TUSBDeviceUnbind = function(Device:PUSBDevice; Driver:PUSBDriver):LongWord;`

USB device enumeration callback

`TUSBDeviceEnumerate = function(Device:PUSBDevice; Data:Pointer):LongWord;`

USB device notification callback

`TUSBDeviceNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;`

USB device

PUSBDevice = ^TUSBDevice;

TUSBDevice = record

Device Properties
`Device:TDevice;`	The Device entry for this USB device
USB Properties
`USBId:LongWord;`	Unique Id of this USB in the USB device table
`USBState:LongWord;`	USB device state (eg USB_STATE_ATTACHED)
`USBStatus:LongWord;`	USB device status (eg USB_STATUS_BOUND)
`Host:PUSBHost;`	Host controller this USB device is connected to (Set by USB core)
`Parent:PUSBDevice;`	Hub this USB device is connected to, or nil if this is the Root Hub (Set by USB core)
`Driver:PUSBDriver;`	Driver this USB device is bound to, if any (Set by USB core)
Driver Properties
`Lock:TMutexHandle;`	USB device lock
`Address:LongWord;`	Address of this device (Set by USB core)
`Speed:LongWord;`	Speed at which this device is attached (Set by USB core)
`Depth:LongWord;`	Depth of this device (Root Hub is 0, next level hub is 1 etc) (Set by USB core)
`PortNumber:LongWord;`	1 based index of the USB port on the parent hub this device is plugged into (0 for the Root Hub) (Set by USB core)
`ConfigurationValue:LongWord;`	The current configuration value of this USB device (Set by USB core)
`Descriptor:PUSBDeviceDescriptor;`	Device descriptor of this device (Set by USB core)
`Configuration:PUSBConfiguration;`	Currently selected configuration of this USB device (Set by USB core)
`Configurations:array of PUSBConfiguration;`	All available configurations on this device (Set by USB core)
`Product:array[0..127] of Char;`	Null terminated product string (ASCII encoded, English if available) of this device
`Manufacturer:array[0..127] of Char;`	Null terminated manufacturer string (ASCII encoded, English if available) of this device
`SerialNumber:array[0..127] of Char;`	Null terminated serial number string (ASCII encoded, English if available) of this device
`DriverData:Pointer;`	Private data for the driver of this USB device
`LastError:LongWord;`	Last error to occur on this device
`PendingCount:LongWord;`	Number of USB requests pending for this device (Set by USB core)
`WaiterThread:TThreadId;`	Thread waiting for pending requests to complete (for device detachment) (Set by USB core)
Statistics Properties
`RequestCount:LongWord;`	Number of USB requests that have been submitted to this device
`RequestErrors:LongWord;`	Number of USB requests that have failed on this device
Internal Properties
`Prev:PUSBDevice;`	Previous entry in USB device table
`Next:PUSBDevice;`	Next entry in USB device table

USB configuration

PUSBConfiguration = ^TUSBConfiguration;

TUSBConfiguration = record

Note: Forward declared to satisfy USBDevice
Driver Properties
`Descriptor:PUSBConfigurationDescriptor;`	Configuration descriptor of this configuration (Set by USB core)
`Interfaces:array of PUSBInterface;`	All available interfaces in this configuration (Set by USB core)
`Description:array[0..127] of Char;`	Null terminated description string (ASCII encoded, English if available) of this configuration

USB interface

PUSBInterface = ^TUSBInterface;

TUSBInterface = record

Note: Forward declared to satisfy USBDevice
USB Properties
`Driver:PUSBDriver;`	Driver this USB interface is bound to, if any (Set by USB core)
Driver Properties
`AlternateCount:LongWord;`	The number of alternate settings available for this interface (Set by USB core)
`AlternateSetting:LongWord;`	The currently selected alternate setting for this interface (Set by USB core)
`Descriptor:PUSBInterfaceDescriptor;`	Interface descriptor of this interface (Set by USB core)
`Endpoints:array of PUSBEndpointDescriptor;`	All available endpoint descriptors on this interface (Set by USB core)
`Alternates:array of PUSBAlternate;`	All available alternate settings for this interface (Set by USB core)
`Description:array[0..127] of Char;`	Null terminated description string (ASCII encoded, English if available) of this interface
`ClassData:PByte;`	Pointer to the start of any class specific descriptors for this interface (Set by USB core)
`ClassSize:LongWord;`	Size of any class specific descriptors for this interface (Set by USB core)
`DriverData:Pointer;`	Private data for the driver of this USB interface

USB alternate

PUSBAlternate = ^TUSBAlternate;

TUSBAlternate = record

Note: Forward declared to satisfy USBDevice
Driver Properties
`Descriptor:PUSBInterfaceDescriptor;`	Interface descriptor of this alternate setting (Set by USB core)
`Endpoints:array of PUSBEndpointDescriptor;`	All available endpoint descriptors on this alternate setting (Set by USB core)
`Description:array[0..127] of Char;`	Null terminated description string (ASCII encoded, English if available) of this alternate setting

USB driver enumeration callback

`TUSBDriverEnumerate = function(Driver:PUSBDriver; Data:Pointer):LongWord;`

USB driver bind

`TUSBDriverBind = function(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;`

USB driver unbind

`TUSBDriverUnbind = function(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;`

USB driver

PUSBDriver = ^TUSBDriver;

TUSBDriver = record

Note: Forward declared to satisfy USBDevice
Driver Properties
`Driver:TDriver;`	The Driver entry for this USB Driver
USB Properties
`DriverBind:TUSBDriverBind;`	A Driver specific DriverBind method implementing the standard USB driver interface
`DriverUnbind:TUSBDriverUnbind;`	A Driver specific DriverUnbind method implementing the standard USB driver interface
Interface Properties
`Lock:TMutexHandle;`	Driver lock
Internal Properties
`Prev:PUSBDriver;`	Previous entry in Driver table
`Next:PUSBDriver;`	Next entry in Driver table

USB host enumeration callback

`TUSBHostEnumerate = function(Host:PUSBHost; Data:Pointer):LongWord;`

USB host notification callback

`TUSBHostNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;`

USB host start

`TUSBHostStart = function(Host:PUSBHost):LongWord;`

USB host stop

`TUSBHostStop = function(Host:PUSBHost):LongWord;`

USB host reset

`TUSBHostReset = function(Host:PUSBHost):LongWord;`

USB host submit

`TUSBHostSubmit = function(Host:PUSBHost; Request:PUSBRequest):LongWord;`

USB host cancel

`TUSBHostCancel = function(Host:PUSBHost; Request:PUSBRequest):LongWord;`

USB host

PUSBHost = ^TUSBHost;

TUSBHost = record

Note: Forward declared to satisfy USBDevice
Device Properties
`Device:TDevice;`	The Device entry for this USB Host
USB Properties
`HostId:LongWord;`	Unique Id of this Host in the Host table
`HostState:LongWord;`	Host state (eg USBHOST_STATE_ENABLED)
`HostStart:TUSBHostStart;`	A Host specific HostStart method implementing the standard USB host interface
`HostStop:TUSBHostStop;`	A Host specific HostStop method implementing the standard USB host interface
`HostReset:TUSBHostReset;`	A Host specific HostReset method implementing the standard USB host interface
`HostSubmit:TUSBHostSubmit;`	A Host specific HostSubmit method implementing the standard USB host interface
`HostCancel:TUSBHostCancel;`	A Host specific HostCancel method implementing the standard USB host interface
Driver Properties
`Lock:TMutexHandle;`	Host lock
`RootHub:PUSBDevice;`	The Root hub for this Host (or nil if the Host has not yet been started)
`Alignment:LongWord;`	Host data buffer alignment (for DMA requests etc)
`Multiplier:LongWord;`	Host data buffer multiplier (for DMA requests etc)
`MaxTransfer:LongWord;`	Host maximum transfer size
Statistics Properties
`RequestCount:LongWord;`	Number of USB requests that have been submitted to this host
`RequestErrors:LongWord;`	Number of USB requests that have failed on this host
Internal Properties
`Prev:PUSBHost;`	Previous entry in Host table
`Next:PUSBHost;`	Next entry in Host table

USB request completed

`TUSBRequestCompleted = procedure(Request:PUSBRequest);`

USB request

PUSBRequest = ^TUSBRequest;

TUSBRequest = record

Note: Forward declared to satisfy USBHost
Request Properties
`Device:PUSBDevice;`	USB Device to send this request to
`Endpoint:PUSBEndpointDescriptor;`	Endpoint descriptor on the device to send this request to
`Data:Pointer;`	Data buffer for the request (IN or OUT)
`Size:LongWord;`	Size of data buffer (For IN requests, the maximum number of bytes of data to receive) (For OUT requests, the exact number of bytes of data to send)
`Flags:LongWord;`	Flags for the request (eg USB_REQUEST_FLAG_ALIGNED)
`Callback:TUSBRequestCompleted;`	Callback function that will be called when this USB request has been successfully completed or has failed
`DriverData:Pointer;`	USB device driver private data for the completion callback (Optional)
Control Properties
`SetupData:PUSBControlSetupData;`	Data for the Setup phase of a USB control request (Must be provided for control requests, ignored otherwise)
`StatusData:LongWord;`	Data for the Status phase of a USB control request (For safety only as no data is normally transferred in the status phase)
Result Properties
`Status:LongWord;`	Status of the transfer (USB_STATUS_SUCCESS if successful, or another error code if the transfer failed)
`ActualSize:LongWord;`	Actual size of the data transferred (Should be checked after a successful IN request)
Driver Properties
Note: Private variables for use by Host drivers (Do not use from device drivers)
`TransferData:Pointer;`	Host driver private data for transfer handling
`CurrentData:Pointer;`	Host driver data pointer during transaction processing
`IsPing:LongBool;`	Ping request in progress as part of request processing
`IsSplit:LongBool;`	Request is a split transaction due to full or low speed device
`CompleteSplit:LongBool;`	On a split transaction indicates if the request is on the start split or complete split phase
`ShortAttempt:LongBool;`	The current transaction for this request is a short read or write
`StartOfFrame:LongBool;`	The request needs to wait for the next start of frame to be started
`ControlPhase:LongWord;`	The currently processing phase of a control request
`NextDataPID:LongWord;`	The next Data PID for the data toggle during IN or OUT (Data0/Data1 etc)
`AttemptedSize:LongWord;`
`AttemptedPacketsRemaining:LongWord;`
`AttemptedBytesRemaining:LongWord;`
`BytesAttempted:LongWord;`
`BytesTransferred:LongWord;`
`SplitErrorCount:LongWord;`
`CompleteSplitRetries:LongWord;`
`ResubmitThread:TThreadHandle;`	The handle of the thread performing resubmit for this request (or INVALID_HANDLE_VALUE)
`ResubmitSemaphore:TSemaphoreHandle;`	The handle of the semaphore used to signal the resubmit thread (or INVALID_HANDLE_VALUE)
Debug Statistics
`StartSplitAttempts:LongWord;`
`CompleteSplitAttempts:LongWord;`
`CompleteSplitRestarts:LongWord;`
`StartSplitNAKs:LongWord;`
`CompleteSplitNYETs:LongWord;`
`CompleteSplitNAKs:LongWord;`

USB hub descriptor

PUSBHubDescriptor = ^TUSBHubDescriptor;

TUSBHubDescriptor = packed record

Note: See Table 11-13 in Section 11.23 of the USB 2.0 specification
`bDescLength:Byte;`
`bDescriptorType:Byte;`
`bNbrPorts:Byte;`
`wHubCharacteristics:Word;`
`bPwrOn2PwrGood:Byte;`
`bHubContrCurrent:Byte;`
`varData:array[0..0] of Byte;`	Variable length field, 64 should be the maximum possible length (255 ports = 2 x 32 bytes of data)

USB hub descriptor data

PUSBHubDescriptorData = ^TUSBHubDescriptorData;

TUSBHubDescriptorData = array[0..63] of Byte;

Note: Array type to allow typecasting of varData element in TUSBHubDescriptor

USB port status

PUSBPortStatus = ^TUSBPortStatus;

TUSBPortStatus = packed record

Note: See Section 11.24.2.7 of the USB 2.0 specification
`wPortStatus:Word;`	See: USB_PORT_STATUS values above
`wPortChange:Word;`	See: USB_PORT_CHANGE values above

USB hub status

PUSBHubStatus = ^TUSBHubStatus;

TUSBHubStatus = packed record

Note: See Section 11.24.2.6 of the USB 2.0 specification
`wHubStatus:Word;`	See: USB_HUB_STATUS values above
`wHubChange:Word;`	See: USB_HUB_CHANGE values above

USB hub data

PUSBHubData = ^TUSBHubData;

TUSBHubData = record

`Data:array[0..7] of Byte;`

USB port

PUSBPort = ^TUSBPort;

TUSBPort = record

`Hub:PUSBHub;`	Pointer to the USB hub this port is attached to
`Number:Byte;`	Number of this port (1-based)
`Child:PUSBDevice;`	Pointer to the USB device attached to this port, or nil if there is none
`Status:TUSBPortStatus;`	Status of this port

USB hub enumeration callback

`TUSBHubEnumerate = function(Hub:PUSBHub; Data:Pointer):LongWord;`

USB hub notification callback

`TUSBHubNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;`

USB hub

PUSBHub = ^TUSBHub;

TUSBHub = record

Note: Forward declared to satisfy USBPort
Device Properties
`Device:TDevice;`	The Device entry for this Hub
Hub Properties
`HubId:LongWord;`	Unique Id of this Hub in the Hub table
`HubState:LongWord;`	Hub state (eg USBHUB_STATE_ATTACHED)
Driver Properties
`Lock:TMutexHandle;`	Hub lock
`Descriptor:PUSBHubDescriptor;`	Class specific Descriptor for this hub
`Ports:array of TUSBPort;`	Ports on this hub (Set by USBHubCreatePorts using the value in Descriptor.bNbrPorts)
Statistics Properties
`ReceiveCount:LongWord;`
`ReceiveErrors:LongWord;`
USB Properties
`StatusData:PUSBHubData;`	Hub status change data buffer
`StatusRequest:PUSBRequest;`	Hub status change request
`StatusEndpoint:PUSBEndpointDescriptor;`	Hub Interrupt IN Endpoint
`PendingCount:LongWord;`	Number of USB requests pending for this hub
`WaiterThread:TThreadId;`	Thread waiting for pending requests to complete (for hub detachment)
Internal Properties
`Prev:PUSBHub;`	Previous entry in Hub table
`Next:PUSBHub;`	Next entry in Hub table

USB logging

`TUSBLogOutput = procedure(const AText:String; Data:Pointer);`

Public variables

USB log device output

`USB_LOG_ALL_CONFIGURATIONS:Boolean = True;`

`USB_LOG_ALTERNATE_SETTINGS:Boolean = True;`

USB log tree output

`USB_TREE_SPACES_PER_LEVEL:LongWord = 6;`

`USB_TREE_LINES_PER_PORT:LongWord = 2;`

USB logging

`USB_DEFAULT_LOG_LEVEL:LongWord = USB_LOG_LEVEL_DEBUG;`	Minimum level for USB messages. Only messages with level greater than or equal to this will be printed.

`USB_LOG_ENABLED:Boolean;`

Function declarations

Initialization functions

procedure USBInit;

Description: Performs basic initialization of the USB core driver, after this devices, hosts and drivers can be registered however nothing will work until USBStart is called

Note	None documented

function USBStart:LongWord;

Description: Starts all registered USB hosts, starts the USB hub thread and begins the USB enumeration process. USB enumeration will continue after this function returns as devices are discovered by changes in hub status.

Note	None documented

function USBStop:LongWord;

Description: To be documented

Note	None documented

procedure USBAsyncStart(Host:PUSBHost);

Description: To be documented

Note	None documented

USB device, driver and host functions

function USBDeviceGetAddress(Device:PUSBDevice):Byte;

Description: Get the bus address for the specified device

Device	The USB device to get the address for
Return	Device address or 0 on failure

function USBDeviceSetAddress(Device:PUSBDevice; Address:Byte):LongWord;

Description: Set the bus address for the specified device

Device	The USB device to set the address for
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceGetDescriptor(Device:PUSBDevice; bRequest,bmRequestType:Byte; wValue,wIndex:Word; Data:Pointer; Length:Word):LongWord;

Description: Read any descriptor from the specified device using USBControlRequest

Device	The USB device to read the descriptor from
bRequest	See USBControlRequest
bmRequestType	See USBControlRequest
wValue	See USBControlRequest
wIndex	See USBControlRequest
Data	See USBControlRequest
Length	See USBControlRequest
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceGetDeviceDescriptor(Device:PUSBDevice; Data:Pointer; Length:Word):LongWord;

Description: Read all or part of the device descriptor from the specified device using USBControlRequest

Device	The USB device to read the device descriptor from
Data	See USBControlRequest
Length	See USBControlRequest
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceCreateDeviceDescriptor(Device:PUSBDevice; Length:Word):LongWord;

Description: Allocate a device descriptor for the specified device

Device	The USB device to create the device descriptor for
Length	The length of the descriptor to create
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceReadDeviceDescriptor(Device:PUSBDevice; Length:Word):LongWord; inline;

Description: Read all or part of the device descriptor from the specified device using USBControlRequest

Device	The USB device to read the device descriptor from
Length	The amount of the descriptor to read which may be less than the full size
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceReadDeviceDescriptorEx(Device:PUSBDevice; Length:Word; AllowShort:Boolean):LongWord;

Description: Read all or part of the device descriptor from the specified device using USBControlRequest

Device	The USB device to read the device descriptor from
Length	The amount of the descriptor to read which may be less than the full size
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceCreateConfigurations(Device:PUSBDevice):LongWord;

Description: Allocate the available configurations for this device

Device	The USB device to create the configurations for
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceReadConfigurations(Device:PUSBDevice):LongWord;

Description: Read and parse the available configurations for this device

Device	The USB device to read the configurations for
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceCreateConfiguration(Device:PUSBDevice; Index:Byte; Size:Word):LongWord;

Description: Allocate the specified configuration for this device

Device	The USB device to create the configuration for
Index	The index of the configuration to create
Size	The size of the configuration descriptor to create
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceReadConfiguration(Device:PUSBDevice; Index:Byte):LongWord;

Description: Read and parse the specified configuration for this device

Device	The USB device to read the configuration for
Index	The index of the configuration to read
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceGetStringDescriptor(Device:PUSBDevice; Index:Byte; Data:Pointer; Length:Word):LongWord; inline;

Description: Read all or part of the specified string descriptor from the specified device using USBControlRequest

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
Data	See USBControlRequest
Length	See USBControlRequest
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceGetStringDescriptorEx(Device:PUSBDevice; Index:Byte;LanguageId:Word; Data:Pointer; Length:Word):LongWord;

Description: Read all or part of the specified string descriptor from the specified device using USBControlRequest

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
LanguageId	The language identifier of the string descriptor to read (eg USB_LANGID_US_ENGLISH)
Data	See USBControlRequest
Length	See USBControlRequest
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceReadStringLanguageIds(Device:PUSBDevice):TUSBStringDescriptorLANGIDs;

Description: Get the list of supported string language identifiers from the specified device

Device	The USB device to read the language identifiers from
Return	An array of supported language identifiers (Unused values are returned as zero)

function USBDeviceReadStringDescriptor(Device:PUSBDevice; Index:Byte):String; inline;

Description: Get the content of the specified string descriptor from the specified device

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
Return	The ANSI string content of the string descriptor or an empty string on failure

function USBDeviceReadStringDescriptorEx(Device:PUSBDevice;Index:Byte;LanguageId:Word):String;

Description: Get the content of the specified string descriptor from the specified device

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
Language Id	The language identifier of the string descriptor to read (eg USB_LANGID_US_ENGLISH)
Return	The ANSI string content of the string descriptor or an empty string on failure

function USBDeviceReadStringDescriptorW(Device:PUSBDevice; Index:Byte):UnicodeString; inline;

Description: Get the content of the specified string descriptor from the specified device

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
Return	The Unicode string content of the string descriptor or an empty string on failure

function USBDeviceReadStringDescriptorExW(Device:PUSBDevice; Index:Byte; LanguageId:Word):UnicodeString;

Description: Get the content of the specified string descriptor from the specified device

Device	The USB device to read the string descriptor from
Index	The index of the string descriptor to read
LanguageId	The language identifier of the string descriptor to read (eg USB_LANGID_US_ENGLISH)
Return	The Unicode string content of the string descriptor or an empty string on failure

function USBDeviceGetConfigurationDescriptor(Device:PUSBDevice; Index:Byte;Data:Pointer; Length:Word):LongWord;

Description: Read all or part of the specified configuration descriptor from the specified device using USBControlRequest

Device	The USB device to read the configuration descriptor from
Index	The index of the configuration descriptor to read
Data	See USBControlRequest
Length	See USBControlRequest
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceGetConfiguration(Device:PUSBDevice; var ConfigurationValue:Byte):LongWord;

Description: Get the current configuration for the specified device

Device	The USB device to get the current configuration for
ConfigurationValue	The current configuration (As per bConfigurationValue in the configuration descriptor)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceSetConfiguration(Device:PUSBDevice; ConfigurationValue:Byte):LongWord;

Description: Set the configuration for the specified device

Device	The USB device to set the configuration for
ConfigurationValue	The configuration to set (As per bConfigurationValue in the configuration descriptor)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceFindConfigurationByValue(Device:PUSBDevice; ConfigurationValue:Byte):PUSBConfiguration;

Description: Find the configuration represented by configuration value for the specified device

Device	The USB device to find the configuration for
ConfigurationValue	The configuration value to find (As per bConfigurationValue in the configuration descriptor)
Return	USB Configuration if completed or nil on failure

function USBDeviceGetHub(Device:PUSBDevice):PUSBHub;

Description: Get the USB Hub that the specified device is connected to

Device	The USB device to get the hub for
Return	USB Hub if successful or nil on failure

function USBDeviceGetPort(Device:PUSBDevice):PUSBPort;

Description: Get the USB Port that the specified device is connected to

Device	The USB device to get the port for
Return	USB Port if successful or nil on failure

function USBDeviceGetInterface(Device:PUSBDevice; Index:Byte; var AlternateSetting:Byte):LongWord;

Description: Get the interface alternate setting for the specified device

Device	The USB device to get the interface alternate setting for
Index	The index of the interface to get (As per bInterfaceNumber in the interface descriptor)
AlternateSetting	The current alternate setting of the specified interface (As per bAlternateSetting in the interface descriptor)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceSetInterface(Device:PUSBDevice; Index,AlternateSetting:Byte):LongWord;

Description: Set the interface alternate setting for the specified device

Device	The USB device to set the interface alternate setting for
Index	The index of the interface to set (As per bInterfaceNumber in the interface descriptor)
AlternateSetting	The alternate setting to set on the specified interface (As per bAlternateSetting in the interface descriptor)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceFindInterfaceByIndex(Device:PUSBDevice; Index:Byte):PUSBInterface;

Description: Find the interface with the specified index on the specified device

Device	The USB device to find the interface from
Index	The index of the interface to find (As per bInterfaceNumber in the interface descriptor)
Return	The interface for the matching interface of nil if no interface matched

function USBDeviceFindInterfaceByClass(Device:PUSBDevice; InterfaceClass:Byte):PUSBInterface; overload;

Description: Find an interface of the specified class on the specified device

Device	The USB device to find the interface from
InterfaceClass	The interface class to match
Return	The matching interface or nil if no interface matched

function USBDeviceFindInterfaceByClass(Device:PUSBDevice; InterfaceClass,InterfaceSubClass,InterfaceProtocol:Byte):PUSBInterface; overload;

Description: Find an interface of the specified class, subclass and protocol on the specified device

Device	The USB device to find the interface from
InterrfaceClass	The interface class to match
InterfaceSubClass	The interface subclass to match
InterfaceProtocol	The interface protocol to match
Return	The matching interface or nil if no interface matched

function USBDeviceFindEndpointByIndex(Device:PUSBDevice; Interrface:PUSBInterface; Index:Byte):PUSBEndpointDescriptor;

Description: Find the endpoint with the specified index on the specified interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Index	The index of the endpoint to find (First endpoint is zero)
Return	The endpoint for the matching endpoint of nil if no endpoint matched

function USBDeviceFindEndpointByType(Device:PUSBDevice; Interrface:PUSBInterface; Direction,TransferType:Byte):PUSBEndpointDescriptor;

Description: Find an endpoint of the specified type and direction on the specified interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Direction	The direction of the endpoint to find (eg USB_DIRECTION_OUT)
TransferType	The transfer type of the endpoint to find (eg USB_TRANSFER_TYPE_BULK)
Return	The endpoint for the matching endpoint of nil if no endpoint matched

function USBDeviceFindEndpointByTypeEx(Device:PUSBDevice; Interrface:PUSBInterface; Direction,TransferType:Byte; var Index:Byte):PUSBEndpointDescriptor;

Description: Find the next endpoint of the specified type and direction on the specified interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Direction	The direction of the endpoint to find (eg USB_DIRECTION_OUT)
TransferType	The transfer type of the endpoint to find (eg USB_TRANSFER_TYPE_BULK)
Index	The index returned from the last call, pass 0 on the first call
Return	The endpoint for the matching endpoint of nil if no endpoint matched

function USBDeviceCountEndpointsByType(Device:PUSBDevice; Interrface:PUSBInterface; Direction,TransferType:Byte):Byte;

Description: Count the number of endpoints of the specified type and direction on the specified interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Direction	The direction of the endpoint to find (eg USB_DIRECTION_OUT)
TransferType	The transfer type of the endpoint to find (eg USB_TRANSFER_TYPE_BULK)
Return	The number of matching endpoints on the specified interface

function USBDeviceFindAlternateByIndex(Device:PUSBDevice; Interrface:PUSBInterface; Index:Byte):PUSBAlternate;

Description: Find the alternate setting with the specified index on the specified interface of the specified device

Device	The USB device to find the alternate setting from
Interrface	The interface to find the alternate setting from
Index	The index of the alternate setting to find (First alternate setting is zero)
Return	The alternate setting for the matching alternate setting of nil if no alternate setting matched

function USBDeviceFindAlternateBySetting(Device:PUSBDevice; Interrface:PUSBInterface; AlternateSetting:Byte):PUSBAlternate;

Description: Find the alternate setting with the specified value on the specified interface of the specified device

Device	The USB device to find the alternate setting from
Interrface	The interface to find the alternate setting from
AlternateSetting	The value of the alternate setting to find
Return	The alternate setting for the matching alternate setting of nil if no alternate setting matched

function USBDeviceFindAlternateEndpointByIndex(Device:PUSBDevice; Interrface:PUSBInterface; Alternate:PUSBAlternate; Index:Byte):PUSBEndpointDescriptor;

Description: Find the endpoint with the specified index on the specified alternate setting interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Alternate	The alternate setting to find the endpoint from
Index	The index of the endpoint to find (First endpoint is zero)
Return	The endpoint for the matching endpoint of nil if no endpoint matched

function USBDeviceFindAlternateEndpointByType(Device:PUSBDevice; Interrface:PUSBInterface; Alternate:PUSBAlternate; Direction,TransferType:Byte):PUSBEndpointDescriptor;

Description: Find an endpoint of the specified type and direction on the specified alternate setting interface of the specified device

Device	The USB device to find the endpoint from
Interrface	The interface to find the endpoint from
Alternate	The alternate setting to find the endpoint from
Direction	The direction of the endpoint to find (eg USB_DIRECTION_OUT)
TransferType	The transfer type of the endpoint to find (eg USB_TRANSFER_TYPE_BULK)
Return	The endpoint for the matching endpoint of nil if no endpoint matched

function USBDeviceSetFeature(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Feature,Index:Word):LongWord;

Description: Enable a feature on the specified endpoint on the specified device

Device	The USB device to enable the feature for
Endpoint	The endpoint to enable the feature on
Feature	The feature to enable
Index	To be documented
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceClearFeature(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Feature:Word):LongWord;

Description: Disable a feature on the specified endpoint on the specified device

Device	The USB device to disable the feature for
Endpoint	The endpoint to disable the feature on
Feature	The feature to disable
Index	To be documented
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceSetState(Device:PUSBDevice; State:LongWord):LongWord;

Description: Set the state of the specified device and send a notification

Device	The USB device to set the state for
State	The new state to set and notify (eg USB_STATE_ATTACHED)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceSetStatus(Device:PUSBDevice; Status:LongWord):LongWord;

Description: Set the status of the specified device and send a notification

Device	The USB device to set the status for
Status	The new status to set and notify (eg USB_STATUS_BOUND)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceBind(Device:PUSBDevice):LongWord;

Description: Attempt to bind a device to one of the registered drivers

Device	The device to attempt to bind a driver to
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceUnbind(Device:PUSBDevice; Driver:PUSBDriver):LongWord;

Description: Unbind a device from a driver

Device	The device to unbind a driver from
Driver	The driver to unbind the device from (nil to unbind from current driver)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceAttach(Device:PUSBDevice):LongWord;

Description: Configure and initialize a newly attached USB device

Device	New USB device to configure and initialize
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceDetach(Device:PUSBDevice):LongWord;

Description: Shutdown and detach a USB device

Device	The USB device to shutdown and detach
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBDeviceAllocate(Host:PUSBHost; Parent:PUSBDevice):PUSBDevice;

Description: Create and Register a new Device entry in the Device table}

Host	The Host this device is attached to
Parent	The Parent device (Hub) this device is attached to (nil if this device is a root hub)
Return	Pointer to new Device entry or nil if device could not be created

function USBDeviceRelease(Device:PUSBDevice):LongWord;

Description: Deregister and Destroy a Device from the Device table

Device	The device to deregister and destroy
Return	ERROR_SUCCESS if completed or another error code on failure

function USBDeviceFind(USBId:LongWord):PUSBDevice;

Description: To be documented

Note	None documented

function USBDeviceFindById(VendorId,ProductId:Word):PUSBDevice;

Description: To be documented

Note	None documented

function USBDeviceFindByName(const Name:String):PUSBDevice; inline;

Description: To be documented

Note	None documented

function USBDeviceFindByDescription(const Description:String):PUSBDevice; inline;

Description: To be documented

Note	None documented

function USBDeviceEnumerate(Callback:TUSBDeviceEnumerate; Data:Pointer):LongWord;

Description: To be documented

Note	None documented

function USBDeviceNotification(Device:PUSBDevice; Callback:TUSBDeviceNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;

Description: To be documented

Note	None documented

function USBDriverCreate:PUSBDriver;

Description: Create a new USB Driver entry

Return	Pointer to new Driver entry or nil if driver could not be created

function USBDriverCreateEx(Size:LongWord):PUSBDriver;

Description: Create a new USB Driver entry

Size	Size in bytes to allocate for new driver (Including the driver entry)
Return	Pointer to new Driver entry or nil if driver could not be created

function USBDriverDestroy(Driver:PUSBDriver):LongWord;

Description: Destroy an existing USB Driver entry

Note	None documented

function USBDriverRegister(Driver:PUSBDriver):LongWord;

Description: Register a new USB Driver in the Driver table

Note	None documented

function USBDriverDeregister(Driver:PUSBDriver):LongWord;

Description: Deregister a USB Driver from the Driver table

Note	None documented

function USBDriverFind(DriverId:LongWord):PUSBDriver;

Description: Find a driver by Id in the USB Driver table

Note	None documented

function USBDriverFindByName(const Name:String):PUSBDriver; inline;

Description: Find a driver by name in the Driver table

Note	None documented

function USBDriverEnumerate(Callback:TUSBDriverEnumerate; Data:Pointer):LongWord;

Description: Enumerate all drivers in the USB Driver table

Note	None documented

function USBHostSetState(Host:PUSBHost; State:LongWord):LongWord;

Description: Set the state of the specified host and send a notification}

Host	The USB host to set the state for
State	The new state to set and notify (eg USBHOST_STATE_ENABLED)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBHostCreate:PUSBHost;

Description: Create a new Host entry

Return	Pointer to new Host entry or nil if host could not be created

function USBHostCreateEx(Size:LongWord):PUSBHost;

Description: Create a new Host entry

Size	Size in bytes to allocate for new host (Including the host entry)
Return	Pointer to new Host entry or nil if host could not be created

function USBHostDestroy(Host:PUSBHost):LongWord;

Description: Destroy an existing Host entry

Note	None documented

function USBHostRegister(Host:PUSBHost):LongWord;

Description: Register a new Host in the Host table

Note	None documented

function USBHostDeregister(Host:PUSBHost):LongWord;

Description: Deregister a Host from the Host table

Note	None documented

function USBHostFind(HostId:LongWord):PUSBHost;

Description: To be documented

Note	None documented

function USBHostFindByName(const Name:String):PUSBHost; inline;

Description: To be documented

Note	None documented

function USBHostFindByDescription(const Description:String):PUSBHost; inline;

Description: To be documented

Note	None documented

function USBHostEnumerate(Callback:TUSBHostEnumerate; Data:Pointer):LongWord;

Description: To be documented

Note	None documented

function USBHostNotification(Host:PUSBHost; Callback:TUSBHostNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;

Description: To be documented

Note	None documented

function USBBufferAllocate(Device:PUSBDevice; Size:LongWord):Pointer; inline;

Description: Allocate a data buffer for a USB request

Device	The device that the request will be sent to
Size	The size of the data buffer to allocate
Return	The newly allocated buffer or nil on failure

function USBBufferAllocateEx(Device:PUSBDevice; Size:LongWord; var Flags:LongWord):Pointer;

Description: Allocate a data buffer for a USB request

Device	The device that the request will be sent to
Size	The size of the data buffer to allocate
Flags	The returned flags for the allocated buffer (eg USB_REQUEST_FLAG_SHARED)
Return	The newly allocated buffer or nil on failure

function USBBufferValidate(Device:PUSBDevice; Buffer:Pointer; Size:LongWord; var Flags:LongWord):LongWord;

Description: Validate a data buffer for a USB request against the USB host requirements

Device	The device that the request will be sent to
Buffer	The data buffer to validate
Size	The size of the data buffer
Flags	The returned flags for the validated buffer (eg USB_REQUEST_FLAG_SHARED)
Return	USB_STATUS_SUCCESS on success or another error code on failure

function USBBufferRelease(Buffer:Pointer):LongWord;

Description: Release a data buffer from a USB request

Data	The buffer to be released
Return	USB_STATUS_SUCCESS on success or another error code on failure

function USBRequestAllocate(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Callback:TUSBRequestCompleted; Size:LongWord; DriverData:Pointer):PUSBRequest; inline;

Description: Allocate a new USB request

Device	The USB device this request will be sent to
Endpoint	The Endpoint descriptor this request will be sent to (Or nil for the default control endpoint)
Callback	The callback function to be called on completion of the request
Size	The size of the data buffer for the request
DriverData	Device driver private data for the callback (Optional)
Return	The newly allocated request or nil on failure

function USBRequestAllocateEx(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Callback:TUSBRequestCompleted; var Data:Pointer; Size:LongWord; DriverData:Pointer):PUSBRequest;

Description: Allocate a new USB request

Device	The USB device this request will be sent to
Endpoint	The Endpoint descriptor this request will be sent to (Or nil for the default control endpoint)
Callback	The callback function to be called on completion of the request
Data	The returned data buffer allocated for the request (Or nil if size is zero)(Pass an existing buffer to prevent allocation)
Size	The size of the data buffer for the request
DriverData	Device driver private data for the callback (Optional)
Return	The newly allocated request or nil on failure

function USBRequestRelease(Request:PUSBRequest):LongWord;

Description: Release and destroy a USB request

Request	The request to be released
Return	USB_STATUS_SUCCESS on success or another error code on failure

function USBRequestInitialize(Request:PUSBRequest; Callback:TUSBRequestCompleted; Data:Pointer; Size:LongWord; DriverData:Pointer):LongWord;

Description: Initialize or Reinitialize an existing USB request

Request	The request to be initialized
Callback	The callback function to be called on completion of the request
Data	The returned data buffer allocated for the request (Or nil if size is zero)
Size	The size of the data buffer for the request
DriverData	Device driver private data for the callback (Optional)
Return	USB_STATUS_SUCCESS on success or another error code on failure

function USBRequestSubmit(Request:PUSBRequest):LongWord;

Description: Submit a USB request to a host controller for execution

Request	The request to be submitted
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	The request will be completed asynchronously by the host controller and the completion callback will be called when the request has either succeeded or failed

function USBRequestCancel(Request:PUSBRequest):LongWord;

Description: Cancel a USB request previously submitted to a host controller

Request	The request to be cancelled
Return	USB_STATUS_SUCCESS if completed or another error code on failure

procedure USBRequestComplete(Request:PUSBRequest);

Description: Called by a host controller when a USB request completes

Request	The USB request which has completed
Note	Not intended to be called directly by applications

function USBControlRequest(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; bRequest,bmRequestType:Byte; wValue,wIndex:Word; Data:Pointer; wLength:Word):LongWord; inline;

Description: Send a USB control request to the specified device and wait for the request to complete

Device	The USB device to send the control request to
Endpoint	The Endpoint to use for the control request (or nil for the default control endpoint)
bRequest	The request to send (See Section 9.4 of the USB 2.0 specification for Standard requests)
bmRequest	Type of request to send (See Section 9.3.1 of the USB 2.0 specification for Standard request types)
wValue	Request specific data
wIndex	Request specific data
Data	Buffer for the data to be sent or received from the request (Ignored if wLength is 0)
wLength	Length of the Data buffer in bytes
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBControlRequestEx(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; bRequest,bmRequestType:Byte; wValue,wIndex:Word; Data:Pointer; wLength:Word; Timeout:LongWord; AllowShort:Boolean):LongWord;

Description: Send a USB control request to the specified device and wait for the request to complete

Device	The USB device to send the control request to
Endpoint	The Endpoint to use for the control request (or nil for the default control endpoint)
bRequest	The request to send (See Section 9.4 of the USB 2.0 specification for Standard requests)
bmRequest	Type of request to send (See Section 9.3.1 of the USB 2.0 specification for Standard request types)
wValue	Request specific data
wIndex	Request specific data
Data	Buffer for the data to be sent or received from the request (Ignored if wLength is 0)
wLength	Length of the Data buffer in bytes
Timeout	Milliseconds to wait for request to complete (INFINITE to wait forever)
AllowShort	Allow the return size to be less than the requested size
Return	USB_STATUS_SUCCESS if completed or another error code on failure

procedure USBControlRequestComplete(Request:PUSBRequest);

Description: Called when a USB request from a USB control endpoint completes

Request	The USB request which has completed
Note	Not intended to be called directly by applications

USB synchronous transfer methods

function USBTransfer(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Data:Pointer; Size:LongWord; var Count:LongWord; Timeout:LongWord):LongWord;

Description: Perform a synchronous bulk or interrupt transfer to a USB device and endpoint

Device	The USB device to send the request to
Endpoint	The Endpoint to use for the request
Data	Buffer for the data to be sent or received from the request (Ignored if Size is 0)
Size	Size of the Data buffer in bytes
Count	The actual number of bytes transferred on completion (May apply even on failure or timeout)
Timeout	Milliseconds to wait for request to complete (INFINITE to wait forever)
Return	USB_STATUS_SUCCESS if completed or another error code on failure

procedure USBTransferComplete(Request:PUSBRequest);

Description: Called when a USB control, bulk or interrupt transfer (scheduled by USBTransfer or USBControlTransfer) completes

Request	The USB request which has completed
Note	Not intended to be called directly by applications

function USBControlTransfer(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; bRequest,bmRequestType:Byte; wValue,wIndex:Word; Data:Pointer; wLength:Word; var Count:LongWord; Timeout:LongWord):LongWord;

Description: Perform a synchronous control transfer to a USB device and endpoint

Device	The USB device to send the control request to
Endpoint	The Endpoint to use for the control request (or nil for the default control endpoint)
bRequest	The request to send (See Section 9.4 of the USB 2.0 specification for Standard requests)
bmRequestType	Type of request to send (See Section 9.3.1 of the USB 2.0 specification for Standard request types)
wValue	Request specific data
wIndex	Request specific data
Data	Buffer for the data to be sent or received from the request (Ignored if wLength is 0)
wLength	Length of the Data buffer in bytes
Count	The actual number of bytes transferred on completion (May apply even on failure or timeout)
Timeout	Milliseconds to wait for request to complete (INFINITE to wait forever)
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	This function is very similar to USBControlRequest(Ex) but also returns the actual number of bytes tranferred

function USBBulkTransfer(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Data:Pointer; Size:LongWord; var Count:LongWord; Timeout:LongWord):LongWord;

Description: Perform a synchronous bulk transfer to a USB device and endpoint

Device	The USB device to send the bulk request to
Endpoint	The Endpoint to use for the bulk request
Data	Buffer for the data to be sent or received from the request (Ignored if Size is 0)
Size	Size of the Data buffer in bytes
Count	The actual number of bytes transferred on completion (May apply even on failure or timeout)
Timeout	Milliseconds to wait for request to complete (INFINITE to wait forever)
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	The type and direction of the transfer is determined from the type and direction of the endpoint

function USBInterruptTransfer(Device:PUSBDevice; Endpoint:PUSBEndpointDescriptor; Data:Pointer; Size:LongWord; var Count:LongWord; Timeout:LongWord):LongWord;

Description: Perform a synchronous interrupt transfer to a USB device and endpoint

Device	The USB device to send the interrupt request to
Endpoint	The Endpoint to use for the interrupt request
Data	Buffer for the data to be sent or received from the request (Ignored if Size is 0)
Size	Size of the Data buffer in bytes
Count	The actual number of bytes transferred on completion (May apply even on failure or timeout)
Timeout	Milliseconds to wait for request to complete (INFINITE to wait forever)
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	The type and direction of the transfer is determined from the type and direction of the endpoint

USB hub functions

function USBHubCreatePorts(Hub:PUSBHub):LongWord;

Description: Create and initialize the ports for a Hub

Hub	The hub to initialize ports for
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBHubPowerOnPorts(Hub:PUSBHub):LongWord;

Description: Power on all ports on a Hub

Hub	The hub to power on ports for
Return	USB_STATUS_SUCCESS if completed or another error code on failure

function USBHubCreateHubDescriptor(Hub:PUSBHub):LongWord;

Description: Allocate the hub descriptor for the specified hub

Hub	The hub to create the descriptor for
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	The class specific hub descriptor is not the same as the device descriptor

function USBHubReadHubDescriptor(Hub:PUSBHub):LongWord;

Description: Read the hub descriptor for the specified hub

Hub	The hub to read the descriptor for
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	The class specific hub descriptor is not the same as the device descriptor

function USBHubLock(Hub:PUSBHub):LongWord;

Description: Lock the specified Hub to prevent changes

Hub	The hub to lock
Return	ERROR_SUCCESS if completed or another error code on failure

function USBHubUnlock(Hub:PUSBHub):LongWord;

Description: Unlock the specified Hub to allow changes

Hub	The hub to unlock
Return	ERROR_SUCCESS if completed or another error code on failure

function USBHubSetState(Hub:PUSBHub; State:LongWord):LongWord;

Description: Set the state of the specified hub and send a notification

Hub	The hub 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 USBHubAllocate(Device:PUSBDevice):PUSBHub;

Description: Create and Register a new Hub device

Device	The USB device that represents this hub
Return	Pointer to new Hub entry or nil if hub could not be created

function USBHubRelease(Hub:PUSBHub):LongWord;

Description: Deregister and Destroy a Hub device

Hub	The hub to deregister and destroy
Return	ERROR_SUCCESS if completed or another error code on failure

function USBHubFind(HubId:LongWord):PUSBHub;

Description: To be documented

Note	None documented

function USBHubFindByName(const Name:String):PUSBHub; inline;

Description: To be documented

Note	None documented

function USBHubFindByDescription(const Description:String):PUSBHub; inline;

Description: To be documented

Note	None documented

function USBHubEnumerate(Callback:TUSBHubEnumerate; Data:Pointer):LongWord;

Description: To be documented

Note	None documented

function USBHubNotification(Hub:PUSBHub; Callback:TUSBHubNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;

Description: To be documented

Note	None documented

procedure USBHubBindDevices(Device:PUSBDevice; Callback:TUSBDeviceBind);

Description: Enumerate each device in the USB tree and call a bind callback for each one

Device	USB device at which to start the enumeration
Callback	Bind callback function to execute for each device

procedure USBHubUnbindDevices(Device:PUSBDevice; Driver:PUSBDriver; Callback:TUSBDeviceUnbind);

Description: Enumerate each device in the USB tree and call an unbind callback for each one

Device	USB device at which to start the enumeration
Callback	Unbind callback function to execute for each device

procedure USBHubEnumerateDevices(Device:PUSBDevice; Callback:TUSBDeviceEnumerate; Data:Pointer);

Description: Enumerate each device in the USB tree and call an enumerate callback for each one

Device	USB device at which to start the enumeration
Callback	Enumerate callback function to execute for each device

function USBHubPortReset(Port:PUSBPort; Delay:LongWord):LongWord;

Description: Reset a the specified USB port

Port	USB port to reset
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock

function USBHubPortDisable(Port:PUSBPort):LongWord;

Description: Disable the specified USB port

Port	USB port to disable
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock A port cannot be enabled in software, only disabled.

function USBHubPortPowerOn(Port:PUSBPort):LongWord;

Description: Power on the specified USB port

Port	USB port to power on
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock Not all hubs support powering on and off individual ports, you must check if the hub includes the USB_HUB_CHARACTERISTIC_LPSM_PORT in its descriptor.

function USBHubPortPowerOff(Port:PUSBPort):LongWord;

Description: Power off the specified USB port

Port	USB port to power off
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock Not all hubs support powering on and off individual ports, you must check if the hub includes the USB_HUB_CHARACTERISTIC_LPSM_PORT in its descriptor.

function USBHubPortGetStatus(Port:PUSBPort):LongWord;

Description: Read the status of the specified USB port

Port	USB port to read status for
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock

function USBHubPortSetFeature(Port:PUSBPort; Feature:Word):LongWord;

Description: Enable a feature on the specified USB port

Port	USB port to enable the feature on
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock

function USBHubPortClearFeature(Port:PUSBPort; Feature:Word):LongWord;

Description: Disable a feature on the specified USB port

Port	USB port to disable the feature on
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock

function USBHubPortChangeFeature(Port:PUSBPort; Feature:Word; Enable:Boolean):LongWord;

Description: Enable or disable a feature on the specified USB port

Port	USB port to enable or disable the feature on
Feature	The feature to enable or disable
Enable	True to enable the feature or False to disable the feature
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock

function USBHubPortAttachDevice(Port:PUSBPort):LongWord;

Description: Attach a newly connected USB device to the specified USB port

Port	USB port to attach the new device to
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock Only called in response to a status change on the hub

function USBHubPortDetachDevice(Port:PUSBPort):LongWord;

Description: Detach a disconnected USB device from the specified USB port

Port	USB port to detach the device from
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock Only called in response to a status change on the hub

function USBHubPortStatusChanged(Port:PUSBPort):LongWord;

Description: Process a status change for the specified USB port

Port	USB port to process the status change for
Return	USB_STATUS_SUCCESS if completed or another error code on failure
Note	Caller must hold the hub lock Only called in response to a status change on the hub

function USBHubExecute(Parameter:Pointer):PtrInt;

Description: The Hub thread procedure which is responsible for receiving completed hub status change requests, processing them for changes and then resubmitting the request

Note	One status change request exists for each hub currently connected and is created and submitted by the hub driver when it binds to a new hub device. When a hub is disconnected the hub driver will remove the request when the hub is detached and destroyed.

procedure USBHubStatusComplete(Request:PUSBRequest);

Description: Called when the USB request from a USB hub IN interrupt endpoint completes

Request	The USB request which has completed

function USBHubDriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;

Description: Bind the Hub 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 USBHubDriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;

Description: Unbind the Hub 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

USB device, driver and host helper functions

function USBDeviceGetCount:LongWord; inline;

Description: Get the current device count

Note	None documented

function USBDeviceCheck(Device:PUSBDevice):PUSBDevice;

Description: Check if the supplied Device is in the device table

Note	None documented

function USBDriverGetCount:LongWord; inline;

Description: Get the current USB driver count

Note	None documented

function USBDriverCheck(Driver:PUSBDriver):PUSBDriver;

Description: Check if the supplied USB Driver is in the driver table

Note	None documented

function USBHostGetCount:LongWord; inline;

Description: Get the current host count

Note	None documented

function USBHostCheck(Host:PUSBHost):PUSBHost;

Description: Check if the supplied Host is in the host table

Note	None documented

function USBIsHub(Device:PUSBDevice):Boolean;

Description: Returns True if Device is a Hub or False if not

Note	None documented

function USBIsRootHub(Device:PUSBDevice):Boolean;

Description: Returns True if Device is a Root Hub or False if not

Note	None documented

function USBIsControlRequest(Request:PUSBRequest):Boolean;

Description: Returns True if Request is a control request or False if not

Note	None documented

function USBIsBulkRequest(Request:PUSBRequest):Boolean;

Description: Returns True if Request is a bulk request or False if not

Note	None documented

function USBIsInterruptRequest(Request:PUSBRequest):Boolean;

Description: Returns True if Request is an interrupt request or False if not

Note	None documented

function USBIsIsochronousRequest(Request:PUSBRequest):Boolean;

Description: Returns True if Request is an isochronous request or False if not

Note	None documented

function USBIsInEndpoint(Endpoint:PUSBEndpointDescriptor):Boolean;

Description: Returns True is Endpoint is an IN endpoint or False if not

Note	None documented

function USBIsOutEndpoint(Endpoint:PUSBEndpointDescriptor):Boolean;

Description: Returns True is Endpoint is an OUT endpoint or False if not

Note	None documented

function USBIsBulkEndpoint(Endpoint:PUSBEndpointDescriptor):Boolean;

Description: Returns True is Endpoint is a BULK endpoint or False if not

Note	None documented

function USBIsInterruptEndpoint(Endpoint:PUSBEndpointDescriptor):Boolean;

Description: Returns True is Endpoint is a INTERRUPT endpoint or False if not

Note	None documented

function USBIsIsochronousEndpoint(Endpoint:PUSBEndpointDescriptor):Boolean;

Description: Returns True is Endpoint is a ISOCHRONOUS endpoint or False if not

Note	None documented

function USBDeviceToString(Device:PUSBDevice):String;

Description: Return a description of a USB device

Device	USB device to get a description of
Return	A string describing the device

function USBStatusToString(Status:LongWord):String;

Description: Translates a USB status code into a string

Note	None documented

function USBClassCodeToString(ClassCode:Integer):String;

Description: Translates a USB class code into a string

Note	None documented

function USBSubClassCodeToString(ClassCode,SubClassCode:Integer):String;

Description: Translates a USB sub class code into a string

Note	None documented

function USBProtocolCodeToString(ClassCode,ProtocolCode:Integer):String;

Description: Translates a USB protocol code into a string

Note	None documented

function USBSpeedToString(Speed:Integer):String;

Description: Translates a USB speed constant into a string

Note	None documented

function USBSpeedToStringAlt(Speed:Integer):String;

Description: Translates a USB speed constant into a string (Alternate version)

Note	None documented

function USBTransferTypeToString(TransferType:Integer):String;

Description: Translates a USB transfer type constant into a string

Note	None documented

function USBDirectionToString(Direction:Integer):String;

Description: Translates a USB direction constant into a string

Note	None documented

function USBBCDVersionToString(BCDVersion:Word):String;

Description: Translates a bcdUSB (binary-coded-decimal USB version) value into a human-readable string

BCDVersion	The bcdUSB value (e.g. from a USB device descriptor) to translate
Return	String describing the USB version

function USBPortStatusConnectedToString(Status:Word):String;

Description: To be documented

Note	None documented

function USBHubCharacteristicsToString(HubCharacteristics:Word):String;

Description: To be documented

Note	None documented

function USBDeviceTypeToString(USBType:LongWord):String;

Description: To be documented

Note	None documented

function USBDeviceStateToString(USBState:LongWord):String;

Description: To be documented

Note	None documented

function USBDeviceStatusToString(USBStatus:LongWord):String;

Description: To be documented

Note	None documented

function USBDeviceStateToNotification(State:LongWord):LongWord;

Description: Convert a Device state value into the notification code for device notifications

Note	None documented

function USBDeviceStatusToNotification(Status:LongWord):LongWord;

Description: Convert a Device status value into the notification code for device notifications

Note	None documented

function USBHostTypeToString(HostType:LongWord):String;

Description: To be documented

Note	None documented

function USBHostStateToString(HostState:LongWord):String;

Description: To be documented

Note	None documented

function USBHostStateToNotification(State:LongWord):LongWord;

Description: Convert a Host state value into the notification code for device notifications

Note	None documented

procedure USBLog(Level:LongWord; Device:PUSBDevice; const AText:String);

Description: To be documented

Note	None documented

procedure USBLogInfo(Device:PUSBDevice; const AText:String); inline;

Description: To be documented

Note	None documented

procedure USBLogWarn(Device:PUSBDevice; const AText:String); inline;

Description: To be documented

Note	None documented

procedure USBLogError(Device:PUSBDevice; const AText:String); inline;

Description: To be documented

Note	None documented

procedure USBLogDebug(Device:PUSBDevice; const AText:String); inline;

Description: To be documented

Note	None documented

procedure USBLogDeviceConfiguration(Device:PUSBDevice; Output:TUSBLogOutput = nil; Data:Pointer = nil);

Description: To be documented

Note	None documented

procedure USBLogDeviceDescriptor(Device:PUSBDevice; Descriptor:PUSBDeviceDescriptor; Output:TUSBLogOutput = nil; Data:Pointer = nil);

Description: To be documented

Note	None documented

procedure USBLogConfigurationDescriptor(Device:PUSBDevice; Descriptor:PUSBConfigurationDescriptor; Output:TUSBLogOutput = nil; Data:Pointer = nil);

Description: To be documented

Note	None documented

procedure USBLogInterfaceDescriptor(Device:PUSBDevice; Descriptor:PUSBInterfaceDescriptor; Output:TUSBLogOutput = nil; Data:Pointer = nil);

Description: To be documented

Note	None documented

procedure USBLogEndpointDescriptor(Device:PUSBDevice; Descriptor:PUSBEndpointDescriptor; Output:TUSBLogOutput = nil; Data:Pointer = nil);

Description: To be documented

Note	None documented

function USBLogDevices:LongWord;

Description: Print information about all devices attached to the USB

Return	ERROR_SUCCESS if completed or another error code on failure

function USBLogDevicesEx(Device:PUSBDevice; Output:TUSBLogOutput; DeviceCallback,TreeCallback:TUSBDeviceEnumerate; Data:Pointer):LongWord;

Description: Print information about one or all devices attached to the USB with custom output and callbacks

Device	The device to print information about (nil for all devices)
Output	The log output callback to print information to (nil to use the default output)
Device Callback	The callback to print device information (nil if no device information should be printed)
Tree Callback	The callback to print tree information (nil if no tree information should be printed)
Data	A pointer to caller specific data which should be passed to the callbacks (Optional)
Return	ERROR_SUCCESS if completed or another error code on failure

function USBLogDeviceCallback(Device:PUSBDevice; Data:Pointer):LongWord;

Description: To be documented

Note	None documented

function USBLogTreeCallback(Device:PUSBDevice; Data:Pointer):LongWord;

Description: To be documented

Note	None documented

procedure USBLogOutput(const AText:String; Data:Pointer);

Description: Default log output procedure for USBLogDevices etc

Note	None documented

USB hub helper functions

function USBHubGetCount:LongWord; inline;

Description: Get the current hub count

Note	None documented

function USBHubCheck(Hub:PUSBHub):PUSBHub;

Description: Check if the supplied Hub is in the hub table

Note	None documented

function USBHubIsMultiTT(Hub:PUSBHub):Boolean;

Description: To be documented

Return	Returns True if Hub has multiple Transaction Translators or False if not

function USBHubIsCompound(Hub:PUSBHub):Boolean;

Description: To be documented

Return	Returns True if Hub is part of a Compound Device or False if not

function USBHubHasPortIndicator(Hub:PUSBHub):Boolean;

Description: To be documented

Return	Returns True if Hub supports Port Indicators or False if not

function USBHubHasPortPowerSwitching(Hub:PUSBHub):Boolean;

Description: To be documented

Return	Returns True if Hub supports per port Power Switching or False if not

function USBHubHasPortCurrentProtection(Hub:PUSBHub):Boolean;

Description: To be documented

Return	Returns True if Hub supports per port Over Current Power Protection or False if not

function USBHubGetTTThinkTime(Hub:PUSBHub):Byte;

Description: Get the TT Think Time from a Hub

Note	None documented

function USBHubTypeToString(HubType:LongWord):String;

Description: Return a string describing the supplied Hub type value

Note	None documented

function USBHubStateToString(HubState:LongWord):String;

Description: Return a string describing the supplied Hub state value

Note	None documented

function USBHubStateToNotification(State:LongWord):LongWord;

Description: Convert a Hub state value into the notification code for device notifications

Note	None documented

Return to Unit Reference

@@ Line 6,692: / Line 6,692: @@
 <pre style="border: 0; padding-bottom:0px;">function USBHubGetTTThinkTime(Hub:PUSBHub):Byte;</pre>
 <div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the TT Think Time from a Hub</div>
+<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
+{| class="wikitable" style="font-size: 14px; background: white;"
+|-
+! Note
+| None documented
+|-
+|}
+</div></div>
+<br />
+<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
+<pre style="border: 0; padding-bottom:0px;">function USBHubTypeToString(HubType:LongWord):String;</pre>
+<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Return a string describing the supplied Hub type value</div>
+<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
+{| class="wikitable" style="font-size: 14px; background: white;"
+|-
+! Note
+| None documented
+|-
+|}
+</div></div>
+<br />
+<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
+<pre style="border: 0; padding-bottom:0px;">function USBHubStateToString(HubState:LongWord):String;</pre>
+<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Return a string describing the supplied Hub state value</div>
 <div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 {| class="wikitable" style="font-size: 14px; background: white;"

Difference between revisions of "Unit USB"

Revision as of 04:17, 18 October 2022

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