Squashed 'lib/lufa/' content from commit 385d40300

git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b

LUFA/Drivers/USB/Core/ConfigDescriptors.c

@@ -0,0 +1,146 @@
+/*
+             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.
+*/
+
+#define  __INCLUDE_FROM_USB_DRIVER
+#include "ConfigDescriptors.h"
+
+#if defined(USB_CAN_BE_HOST)
+uint8_t USB_Host_GetDeviceConfigDescriptor(const uint8_t ConfigNumber,
+                                           uint16_t* const ConfigSizePtr,
+                                           void* const BufferPtr,
+                                           const uint16_t BufferSize)
+{
+	uint8_t ErrorCode;
+	uint8_t ConfigHeader[sizeof(USB_Descriptor_Configuration_Header_t)];
+
+	USB_ControlRequest = (USB_Request_Header_t)
+		{
+			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
+			.bRequest      = REQ_GetDescriptor,
+			.wValue        = ((DTYPE_Configuration << 8) | (ConfigNumber - 1)),
+			.wIndex        = 0,
+			.wLength       = sizeof(USB_Descriptor_Configuration_Header_t),
+		};
+
+	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+	if ((ErrorCode = USB_Host_SendControlRequest(ConfigHeader)) != HOST_SENDCONTROL_Successful)
+	  return ErrorCode;
+
+	*ConfigSizePtr = le16_to_cpu(DESCRIPTOR_PCAST(ConfigHeader, USB_Descriptor_Configuration_Header_t)->TotalConfigurationSize);
+
+	if (*ConfigSizePtr > BufferSize)
+	  return HOST_GETCONFIG_BuffOverflow;
+
+	USB_ControlRequest.wLength = *ConfigSizePtr;
+
+	if ((ErrorCode = USB_Host_SendControlRequest(BufferPtr)) != HOST_SENDCONTROL_Successful)
+	  return ErrorCode;
+
+	if (DESCRIPTOR_TYPE(BufferPtr) != DTYPE_Configuration)
+	  return HOST_GETCONFIG_InvalidData;
+
+	return HOST_GETCONFIG_Successful;
+}
+#endif
+
+void USB_GetNextDescriptorOfType(uint16_t* const BytesRem,
+                                 void** const CurrConfigLoc,
+                                 const uint8_t Type)
+{
+	while (*BytesRem)
+	{
+		USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
+
+		if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
+		  return;
+	}
+}
+
+void USB_GetNextDescriptorOfTypeBefore(uint16_t* const BytesRem,
+                                       void** const CurrConfigLoc,
+                                       const uint8_t Type,
+                                       const uint8_t BeforeType)
+{
+	while (*BytesRem)
+	{
+		USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
+
+		if (DESCRIPTOR_TYPE(*CurrConfigLoc) == Type)
+		{
+			return;
+		}
+		else if (DESCRIPTOR_TYPE(*CurrConfigLoc) == BeforeType)
+		{
+			*BytesRem = 0;
+			return;
+		}
+	}
+}
+
+void USB_GetNextDescriptorOfTypeAfter(uint16_t* const BytesRem,
+                                      void** const CurrConfigLoc,
+                                      const uint8_t Type,
+                                      const uint8_t AfterType)
+{
+	USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, AfterType);
+
+	if (*BytesRem)
+	  USB_GetNextDescriptorOfType(BytesRem, CurrConfigLoc, Type);
+}
+
+uint8_t USB_GetNextDescriptorComp(uint16_t* const BytesRem,
+                                  void** const CurrConfigLoc,
+                                  ConfigComparatorPtr_t const ComparatorRoutine)
+{
+	uint8_t ErrorCode;
+
+	while (*BytesRem)
+	{
+		uint8_t* PrevDescLoc  = *CurrConfigLoc;
+		uint16_t PrevBytesRem = *BytesRem;
+
+		USB_GetNextDescriptor(BytesRem, CurrConfigLoc);
+
+		if ((ErrorCode = ComparatorRoutine(*CurrConfigLoc)) != DESCRIPTOR_SEARCH_NotFound)
+		{
+			if (ErrorCode == DESCRIPTOR_SEARCH_Fail)
+			{
+				*CurrConfigLoc = PrevDescLoc;
+				*BytesRem      = PrevBytesRem;
+			}
+
+			return ErrorCode;
+		}
+	}
+
+	return DESCRIPTOR_SEARCH_COMP_EndOfDescriptor;
+}
+