Merge commit '60b30c0363' as 'lib/lufa'
This commit is contained in:
Jack Humbert
commit
8655d4f494
1455 changed files with 394541 additions and 0 deletions
|
|
@ -0,0 +1,189 @@
|
|||
/*
|
||||
LUFA Library
|
||||
Copyright (C) Dean Camera, 2017.
|
||||
|
||||
dean [at] fourwalledcubicle [dot] com
|
||||
www.lufa-lib.org
|
||||
*/
|
||||
|
||||
/*
|
||||
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
||||
|
||||
Permission to use, copy, modify, distribute, and sell this
|
||||
software and its documentation for any purpose is hereby granted
|
||||
without fee, provided that the above copyright notice appear in
|
||||
all copies and that both that the copyright notice and this
|
||||
permission notice and warranty disclaimer appear in supporting
|
||||
documentation, and that the name of the author not be used in
|
||||
advertising or publicity pertaining to distribution of the
|
||||
software without specific, written prior permission.
|
||||
|
||||
The author disclaims all warranties with regard to this
|
||||
software, including all implied warranties of merchantability
|
||||
and fitness. In no event shall the author be liable for any
|
||||
special, indirect or consequential damages or any damages
|
||||
whatsoever resulting from loss of use, data or profits, whether
|
||||
in an action of contract, negligence or other tortious action,
|
||||
arising out of or in connection with the use or performance of
|
||||
this software.
|
||||
*/
|
||||
|
||||
/** \file
|
||||
*
|
||||
* USB Device Configuration Descriptor processing routines, to determine the correct pipe configurations
|
||||
* needed to communication with an attached USB device. Descriptors are special computer-readable structures
|
||||
* which the host requests upon device enumeration, to determine the device's capabilities and functions.
|
||||
*/
|
||||
|
||||
#include "ConfigDescriptor.h"
|
||||
|
||||
/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This
|
||||
* routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate
|
||||
* with compatible devices.
|
||||
*
|
||||
* This routine searches for a HID interface descriptor containing at least one Interrupt type IN endpoint and HID descriptor.
|
||||
*
|
||||
* \return An error code from the \ref KeyboardHostWithParser_GetConfigDescriptorDataCodes_t enum.
|
||||
*/
|
||||
uint8_t ProcessConfigurationDescriptor(void)
|
||||
{
|
||||
uint8_t ConfigDescriptorData[512];
|
||||
void* CurrConfigLocation = ConfigDescriptorData;
|
||||
uint16_t CurrConfigBytesRem;
|
||||
|
||||
USB_Descriptor_Interface_t* HIDInterface = NULL;
|
||||
USB_HID_Descriptor_HID_t* HIDDescriptor = NULL;
|
||||
USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
|
||||
|
||||
/* Retrieve the entire configuration descriptor into the allocated buffer */
|
||||
switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
|
||||
{
|
||||
case HOST_GETCONFIG_Successful:
|
||||
break;
|
||||
case HOST_GETCONFIG_InvalidData:
|
||||
return InvalidConfigDataReturned;
|
||||
case HOST_GETCONFIG_BuffOverflow:
|
||||
return DescriptorTooLarge;
|
||||
default:
|
||||
return ControlError;
|
||||
}
|
||||
|
||||
while (!(DataINEndpoint))
|
||||
{
|
||||
/* See if we've found a likely compatible interface, and if there is an endpoint within that interface */
|
||||
if (!(HIDInterface) ||
|
||||
USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
|
||||
DComp_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
|
||||
{
|
||||
/* Get the next HID interface from the configuration descriptor */
|
||||
if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
|
||||
DComp_NextKeyboardInterface) != DESCRIPTOR_SEARCH_COMP_Found)
|
||||
{
|
||||
/* Descriptor not found, error out */
|
||||
return NoCompatibleInterfaceFound;
|
||||
}
|
||||
|
||||
/* Save the interface in case we need to refer back to it later */
|
||||
HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t);
|
||||
|
||||
/* Get the HID descriptor from the configuration descriptor */
|
||||
if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
|
||||
DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found)
|
||||
{
|
||||
/* Descriptor not found, error out */
|
||||
return NoCompatibleInterfaceFound;
|
||||
}
|
||||
|
||||
/* Save the HID descriptor for later use */
|
||||
HIDDescriptor = DESCRIPTOR_PCAST(CurrConfigLocation, USB_HID_Descriptor_HID_t);
|
||||
|
||||
/* Skip the remainder of the loop as we have not found an endpoint yet */
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Retrieve the endpoint address from the endpoint descriptor */
|
||||
USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
|
||||
|
||||
/* If the endpoint is a IN type endpoint */
|
||||
if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)
|
||||
DataINEndpoint = EndpointData;
|
||||
}
|
||||
|
||||
/* Configure the HID data IN pipe */
|
||||
Pipe_ConfigurePipe(KEYBOARD_DATA_IN_PIPE, EP_TYPE_INTERRUPT, DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, 1);
|
||||
Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS);
|
||||
|
||||
/* Get the HID report size from the HID report descriptor */
|
||||
HIDReportSize = HIDDescriptor->HIDReportLength;
|
||||
|
||||
/* Valid data found, return success */
|
||||
return SuccessfulConfigRead;
|
||||
}
|
||||
|
||||
/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
|
||||
* configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
|
||||
* descriptor processing if an incompatible descriptor configuration is found.
|
||||
*
|
||||
* This comparator searches for the next Interface descriptor of the correct Keyboard HID Class and Protocol values.
|
||||
*
|
||||
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
|
||||
*/
|
||||
uint8_t DComp_NextKeyboardInterface(void* CurrentDescriptor)
|
||||
{
|
||||
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
|
||||
|
||||
if (Header->Type == DTYPE_Interface)
|
||||
{
|
||||
USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
|
||||
|
||||
/* Check the HID descriptor class, break out if correct class interface found */
|
||||
if (Interface->Class == HID_CSCP_HIDClass)
|
||||
{
|
||||
return DESCRIPTOR_SEARCH_Found;
|
||||
}
|
||||
}
|
||||
|
||||
return DESCRIPTOR_SEARCH_NotFound;
|
||||
}
|
||||
|
||||
/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
|
||||
* configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
|
||||
* descriptor processing if an incompatible descriptor configuration is found.
|
||||
*
|
||||
* This comparator searches for the next Endpoint descriptor inside the current interface descriptor, aborting the
|
||||
* search if another interface descriptor is found before the required endpoint.
|
||||
*
|
||||
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
|
||||
*/
|
||||
uint8_t DComp_NextKeyboardInterfaceDataEndpoint(void* CurrentDescriptor)
|
||||
{
|
||||
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
|
||||
|
||||
if (Header->Type == DTYPE_Endpoint)
|
||||
return DESCRIPTOR_SEARCH_Found;
|
||||
else if (Header->Type == DTYPE_Interface)
|
||||
return DESCRIPTOR_SEARCH_Fail;
|
||||
else
|
||||
return DESCRIPTOR_SEARCH_NotFound;
|
||||
}
|
||||
|
||||
/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
|
||||
* configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
|
||||
* descriptor processing if an incompatible descriptor configuration is found.
|
||||
*
|
||||
* This comparator searches for the next HID descriptor within the current HID interface descriptor.
|
||||
*
|
||||
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
|
||||
*/
|
||||
uint8_t DComp_NextHID(void* CurrentDescriptor)
|
||||
{
|
||||
USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
|
||||
|
||||
if (Header->Type == HID_DTYPE_HID)
|
||||
return DESCRIPTOR_SEARCH_Found;
|
||||
else if (Header->Type == DTYPE_Interface)
|
||||
return DESCRIPTOR_SEARCH_Fail;
|
||||
else
|
||||
return DESCRIPTOR_SEARCH_NotFound;
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue