Difference between revisions of "Unit USBCDCETHERNET"

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----
 
----
  
−
''To be documented''
 
  
 +
'''Initialization functions'''
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 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure CDCEthernetInit;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Initialize the CDC Ethernet unit, create and register the driver</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Called only during system startup
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|-
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|}
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</div></div>
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<br />
 +
 +
'''CDCEthernet network functions'''
 +
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetNetworkOpen(Network:PNetworkDevice):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkDeviceOpen for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Not intended to be called directly by applications, use NetworkDeviceOpen instead.
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetNetworkClose(Network:PNetworkDevice):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkDeviceClose for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Not intended to be called directly by applications, use NetworkDeviceClose instead.
 +
|-
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|}
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</div></div>
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<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 CDCEthernetNetworkControl(Network:PNetworkDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkDeviceControl for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| Not intended to be called directly by applications, use NetworkDeviceControl instead.
 +
|-
 +
|}
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</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 CDCEthernetBufferAllocate(Network:PNetworkDevice; var Entry:PNetworkEntry):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkBufferAllocate for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
 +
| Not intended to be called directly by applications, use NetworkBufferAllocate instead.
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|-
 +
|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetBufferRelease(Network:PNetworkDevice; Entry:PNetworkEntry):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkBufferRelease for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Note
 +
| Not intended to be called directly by applications, use NetworkBufferRelease instead.
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetBufferReceive(Network:PNetworkDevice; var Entry:PNetworkEntry):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkBufferReceive for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
 +
| Not intended to be called directly by applications, use NetworkBufferReceive instead.
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|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetBufferTransmit(Network:PNetworkDevice; Entry:PNetworkEntry):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of NetworkBufferTransmit for the CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Not intended to be called directly by applications, use NetworkBufferTransmit instead.
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|-
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|}
 +
</div></div>
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<br />
 +
 +
'''CDC Ethernet USB functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function CDCEthernetDriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Bind the CDC Ethernet driver to a USB device if it is suitable</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Device
 +
| The USB device to attempt to bind to
 +
|-
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! Interrface
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| The USB interface to attempt to bind to (or nil for whole device)
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|-
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! Return
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| USB_STATUS_SUCCESS if completed, USB_STATUS_DEVICE_UNSUPPORTED if unsupported or another error code on failure
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|-
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|}
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</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 CDCEthernetDriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Unbind the CDC Ethernet driver from a USB device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Device
 +
| The USB device to unbind from
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|-
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! Interrface
 +
| The USB interface to unbind from (or nil for whole device)
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|-
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! Return
 +
| USB_STATUS_SUCCESS if completed or another error code on failure
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|-
 +
|}
 +
</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;">procedure CDCEthernetReceiveWorker(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called (by a Worker thread) to process a completed USB request from the CDC Ethernet bulk IN endpoint</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
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|-
 +
|}
 +
</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;">procedure CDCEthernetReceiveComplete(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request from the CDC Ethernet bulk IN endpoint completes</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
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|-
 +
! Note
 +
| Request is passed to worker thread for processing to prevent blocking the USB completion
 +
|-
 +
|}
 +
</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;">procedure CDCEthernetTransmitWorker(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called (by a Worker thread) to process a completed USB request to the CDC Ethernet bulk OUT endpoint</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
 +
|-
 +
|}
 +
</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;">procedure CDCEthernetTransmitComplete(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request to the CDC Ethernet bulk OUT endpoint completes</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
 +
|-
 +
! Note
 +
| Request is passed to worker thread for processing to prevent blocking the USB completion
 +
|-
 +
|}
 +
</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;">procedure CDCEthernetInterruptWorker(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called (by a Worker thread) to process a completed USB request from the CDC Ethernet interrupt IN endpoint</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
 +
|-
 +
|}
 +
</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;">procedure CDCEthernetInterruptComplete(Request:PUSBRequest);</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Called when a USB request from the CDC Ethernet interrupt IN endpoint completes</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Request
 +
| The USB request which has completed
 +
|-
 +
! Note
 +
| Request is passed to worker thread for processing to prevent blocking the USB completion
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
 +
'''CDC ethernet helper functions'''
 +
 +
<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 CDCEthernetCheckDeviceAndInterface(Device:PUSBDevice; Interrface:PUSBInterface; out DriverInfo:LongWord):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check the Device and Interface against the supported and blacklisted devices</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Device
 +
| USB device to check
 +
|-
 +
! Interrface
 +
| USB interface to check
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|-
 +
! Return
 +
| USB_STATUS_SUCCESS if completed or another error code on failure
 +
|-
 +
|}
 +
</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 CDCEthernetGetMacAddress(Device:PUSBDevice; Index:LongWord; Address:PHardwareAddress):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the MAC address of a CDC Ethernet device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Device
 +
| USB device to read from
 +
|-
 +
! Index
 +
| The string descriptor index containing the MAC address
 +
|-
 +
! Address
 +
| Value to read the MAC address into
 +
|-
 +
! Return
 +
| USB_STATUS_SUCCESS if completed or another error code on failure
 +
|-
 +
|}
 +
</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 CDCEthernetUpdateFilter(Network:PCDCEthernetNetwork):LongWord;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Update the packet filter of the CDC Ethernet device</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Network
 +
| The network device to update the packet filter for
 +
|-
 +
! Return
 +
| USB_STATUS_SUCCESS if completed or another error code on failure
 +
|-
 +
|}
 +
</div></div>
 +
<br />
  
 
Return to [[Unit_Reference|Unit Reference]]
 
Return to [[Unit_Reference|Unit Reference]]

Latest revision as of 06:27, 9 September 2021

Return to Unit Reference


Description

USB CDC Ethernet Driver unit

The Ethernet model is part of the USB Communications Device Class (CDC) standard which allows ethernet based networking devices to be supported by USB with a standardized protocol for data transfer and link status.

A CDC Ethernet device is defined by information in the interface descriptors and is not specific to any product and vendor ID. There are numerous devices that support the CDC Ethernet protocol including a number of external adapters and combination hubs.

This driver presents any device recognized as a CDC Ethernet as a standard network device that can be accessed using the API in the Network, Winsock, Winsock2 and Sockets units. It should not be necessary to directly call any of the functions in this unit from application code.

Note: The QEMU emulations of the Raspberry Pi Zero/A+/2B/3A+/3B use a USB CDC Ethernet device.

Constants


[Expand]
CDC ethernet specific CDCETHERNET_*


[Expand]
Driver info constants DRIVER_INFO_*


[Expand]
Vendor id *_VENDOR_ID


[Expand]
CDC ethernet device and interface id CDCETHERNET_DEVICE_ID_*


Type definitions


CDC ethernet device and interface id

[Expand]

PCDCEthernetDeviceId = ^TCDCEthernetDeviceId;

TCDCEthernetDeviceId = record

CDC ethernet network

[Expand]

PCDCEthernetNetwork = ^TCDCEthernetNetwork;

TCDCEthernetNetwork = record


Public variables

None defined

Function declarations


Initialization functions

[Expand] 
procedure CDCEthernetInit;
Description: Initialize the CDC Ethernet unit, create and register the driver


CDCEthernet network functions

[Expand] 
function CDCEthernetNetworkOpen(Network:PNetworkDevice):LongWord;
Description: Implementation of NetworkDeviceOpen for the CDC Ethernet device


[Expand] 
function CDCEthernetNetworkClose(Network:PNetworkDevice):LongWord;
Description: Implementation of NetworkDeviceClose for the CDC Ethernet device


[Expand] 
function CDCEthernetNetworkControl(Network:PNetworkDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
Description: Implementation of NetworkDeviceControl for the CDC Ethernet device


[Expand] 
function CDCEthernetBufferAllocate(Network:PNetworkDevice; var Entry:PNetworkEntry):LongWord;
Description: Implementation of NetworkBufferAllocate for the CDC Ethernet device


[Expand] 
function CDCEthernetBufferRelease(Network:PNetworkDevice; Entry:PNetworkEntry):LongWord;
Description: Implementation of NetworkBufferRelease for the CDC Ethernet device


[Expand] 
function CDCEthernetBufferReceive(Network:PNetworkDevice; var Entry:PNetworkEntry):LongWord;
Description: Implementation of NetworkBufferReceive for the CDC Ethernet device


[Expand] 
function CDCEthernetBufferTransmit(Network:PNetworkDevice; Entry:PNetworkEntry):LongWord;
Description: Implementation of NetworkBufferTransmit for the CDC Ethernet device


CDC Ethernet USB functions

[Expand] 
function CDCEthernetDriverBind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Bind the CDC Ethernet driver to a USB device if it is suitable


[Expand] 
function CDCEthernetDriverUnbind(Device:PUSBDevice; Interrface:PUSBInterface):LongWord;
Description: Unbind the CDC Ethernet driver from a USB device


[Expand] 
procedure CDCEthernetReceiveWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request from the CDC Ethernet bulk IN endpoint


[Expand] 
procedure CDCEthernetReceiveComplete(Request:PUSBRequest);
Description: Called when a USB request from the CDC Ethernet bulk IN endpoint completes


[Expand] 
procedure CDCEthernetTransmitWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request to the CDC Ethernet bulk OUT endpoint


[Expand] 
procedure CDCEthernetTransmitComplete(Request:PUSBRequest);
Description: Called when a USB request to the CDC Ethernet bulk OUT endpoint completes


[Expand] 
procedure CDCEthernetInterruptWorker(Request:PUSBRequest);
Description: Called (by a Worker thread) to process a completed USB request from the CDC Ethernet interrupt IN endpoint


[Expand] 
procedure CDCEthernetInterruptComplete(Request:PUSBRequest);
Description: Called when a USB request from the CDC Ethernet interrupt IN endpoint completes


CDC ethernet helper functions

[Expand] 
function CDCEthernetCheckDeviceAndInterface(Device:PUSBDevice; Interrface:PUSBInterface; out DriverInfo:LongWord):LongWord;
Description: Check the Device and Interface against the supported and blacklisted devices


[Expand] 
function CDCEthernetGetMacAddress(Device:PUSBDevice; Index:LongWord; Address:PHardwareAddress):LongWord;
Description: Get the MAC address of a CDC Ethernet device


[Expand] 
function CDCEthernetUpdateFilter(Network:PCDCEthernetNetwork):LongWord;
Description: Update the packet filter of the CDC Ethernet device


Return to Unit Reference

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