Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

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diff --git a/lib/lufa/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h b/lib/lufa/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h
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index 0000000000..f4f04e445a
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+++ b/lib/lufa/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h
@@ -0,0 +1,314 @@
+/*
+             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
+ *  \brief Host mode driver for the library USB Android Open Accessory Class driver.
+ *
+ *  Host mode driver for the library USB Android Open Accessory Class driver.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the USB module driver
+ *        dispatch header located in LUFA/Drivers/USB.h.
+ */
+
+/** \ingroup Group_USBClassAOA
+ *  \defgroup Group_USBClassAndroidAccessoryHost Android Open Accessory Class Host Mode Driver
+ *
+ *  \section Sec_USBClassAndroidAccessoryHost_Dependencies Module Source Dependencies
+ *  The following files must be built with any user project that uses this module:
+ *    - LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
+ *
+ *  \section Sec_USBClassAndroidAccessoryHost_ModDescription Module Description
+ *  Host Mode USB Class driver framework interface, for the Android Open Accessory USB Class driver.
+ *
+ *  @{
+ */
+
+#ifndef __AOA_CLASS_HOST_H__
+#define __AOA_CLASS_HOST_H__
+
+	/* Includes: */
+		#include "../../USB.h"
+		#include "../Common/AndroidAccessoryClassCommon.h"
+
+		#include <stdio.h>
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_AOA_DRIVER)
+			#error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
+		#endif
+
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** Error code for some Android Open Accessory Host functions, indicating a logical (and not hardware) error. */
+			#define AOA_ERROR_LOGICAL_CMD_FAILED              0x80
+
+		/* Type Defines: */
+			/** \brief Android Open Accessory Class Host Mode Configuration and State Structure.
+			 *
+			 *  Class state structure. An instance of this structure should be made within the user application,
+			 *  and passed to each of the Android Open Accessory class driver functions as the \c AOAInterfaceInfo
+			 *  parameter. This stores each Android Open Accessory interface's configuration and state information.
+			 */
+			typedef struct
+			{
+				struct
+				{
+					USB_Pipe_Table_t DataINPipe; /**< Data IN Pipe configuration table. */
+					USB_Pipe_Table_t DataOUTPipe; /**< Data OUT Pipe configuration table. */
+
+					char*    PropertyStrings[AOA_STRING_TOTAL_STRINGS]; /**< Android Accessory property strings, sent to identify the accessory when the
+					                                                     *   Android device is switched into Open Accessory mode. */
+				} Config; /**< Config data for the USB class interface within the device. All elements in this section
+				           *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
+				           */
+				struct
+				{
+					bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
+					                *   after \ref AOA_Host_ConfigurePipes() is called and the Host state machine is in the
+					                *   Configured state.
+					                */
+					uint8_t  InterfaceNumber; /**< Interface index of the AOA interface within the attached device. */
+				} State; /**< State data for the USB class interface within the device. All elements in this section
+						  *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
+						  *   the interface is enumerated.
+						  */
+			} USB_ClassInfo_AOA_Host_t;
+
+		/* Enums: */
+			/** Enum for the possible error codes returned by the \ref AOA_Host_ConfigurePipes() function. */
+			enum AOA_Host_EnumerationFailure_ErrorCodes_t
+			{
+				AOA_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
+				AOA_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
+				AOA_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Android Open Accessory interface was not found in the device's Configuration Descriptor. */
+				AOA_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
+			};
+
+		/* Function Prototypes: */
+			/** General management task for a given Android Open Accessory host class interface, required for the correct operation of the interface.
+			 *  This should be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing an Android Open Accessory Class host configuration and state.
+			 */
+			void AOA_Host_USBTask(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Validates a device descriptor, to check if the device is a valid Android device, and if it is currently in Android Open Accessory mode.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing an AOA Class host configuration and state.
+			 *  \param[in]     DeviceDescriptor  Pointer a buffer containing the attached device's Device Descriptor.
+			 *  \param[out]    NeedModeSwitch    Pointer to a boolean where the mode switch requirement of the attached device is to be stored.
+			 *
+			 *  \return Boolean \c true if the attached device is a valid Android device, \c false otherwise.
+			 */
+			bool AOA_Host_ValidateAccessoryDevice(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+                                                  const USB_Descriptor_Device_t* const DeviceDescriptor,
+			                                      bool* const NeedModeSwitch) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2) ATTR_NON_NULL_PTR_ARG(3);
+
+			/** Host interface configuration routine, to configure a given Android Open Accessory host interface instance using the Configuration
+			 *  Descriptor read from an attached USB device. This function automatically updates the given Android Open Accessory Host instance's
+			 *  state values and configures the pipes required to communicate with the interface if it is found within the device. This should be
+			 *  called once after the stack has enumerated the attached device, while the host state machine is in the Addressed state.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo      Pointer to a structure containing an AOA Class host configuration and state.
+			 *  \param[in]     ConfigDescriptorSize  Length of the attached device's Configuration Descriptor.
+			 *  \param[in]     ConfigDescriptorData  Pointer to a buffer containing the attached device's Configuration Descriptor.
+			 *
+			 *  \return A value from the \ref AOA_Host_EnumerationFailure_ErrorCodes_t enum.
+			 */
+			uint8_t AOA_Host_ConfigurePipes(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                                uint16_t ConfigDescriptorSize,
+			                                void* ConfigDescriptorData) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
+
+			/** Starts Accessory Mode in the attached Android device. This function will validate the device's Android Open Accessory protocol
+			 *  version, send the configured property strings, and request a switch to Android Open Accessory mode.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing an AOA Class host configuration and state.
+			 *
+			 *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum, or \ref AOA_ERROR_LOGICAL_CMD_FAILED if a logical error occurred..
+			 */
+			uint8_t AOA_Host_StartAccessoryMode(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Sends a given data buffer to the attached USB device, if connected. If a device is not connected when the function is
+			 *  called, the data will be discarded. Bytes will be queued for transmission to the device until either the pipe bank
+			 *  becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows for
+			 *  multiple bytes to be packed into a single pipe packet, increasing data throughput.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *  \param[in]     Buffer            Pointer to a buffer containing the data to send to the device.
+			 *  \param[in]     Length            Length of the data to send to the device.
+			 *
+			 *  \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
+			 */
+			uint8_t AOA_Host_SendData(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                          const void* const Buffer,
+			                          const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Sends a given null-terminated string to the attached USB device, if connected. If a device is not connected when the
+			 *  function is called, the string is discarded. Bytes will be queued for transmission to the device until either the pipe
+			 *  bank becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows
+			 *  for multiple bytes to be packed into a single pipe packet, increasing data throughput.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *  \param[in]     String            Pointer to the null terminated string to send to the device.
+			 *
+			 *  \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
+			 */
+			uint8_t AOA_Host_SendString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                            const char* const String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+
+			/** Sends a given byte to the attached USB device, if connected. If a device is not connected when the function is called, the
+			 *  byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
+			 *  \ref AOA_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
+			 *  packed into a single pipe packet, increasing data throughput.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *  \param[in]     Data              Byte of data to send to the device.
+			 *
+			 *  \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum.
+			 */
+			uint8_t AOA_Host_SendByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                          const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Determines the number of bytes received by the AOA interface from the device, waiting to be read. This indicates the number
+			 *  of bytes in the IN pipe bank only, and thus the number of calls to \ref AOA_Host_ReceiveByte() which are guaranteed to succeed
+			 *  immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be
+			 *  released back to the USB controller until all bytes are read.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *
+			 *  \return Total number of buffered bytes received from the device.
+			 */
+			uint16_t AOA_Host_BytesReceived(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
+			 *  returns a negative value. The \ref AOA_Host_BytesReceived() function may be queried in advance to determine how many bytes
+			 *  are currently buffered in the AOA interface's data receive pipe.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *
+			 *  \return Next received byte from the device, or a negative value if no data received.
+			 */
+			int16_t AOA_Host_ReceiveByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
+			 *
+			 *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+			 *       call will fail.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class host configuration and state.
+			 *
+			 *  \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum.
+			 */
+			uint8_t AOA_Host_Flush(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Creates a standard character stream for the given AOA Device instance so that it can be used with all the regular
+			 *  functions in the standard \c <stdio.h> library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created
+			 *  stream is bidirectional and can be used for both input and output functions.
+			 *
+			 *  Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
+			 *  fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
+			 *  be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own
+			 *  line buffering.
+			 *
+			 *  \note The created stream can be given as \c stdout if desired to direct the standard output from all \c <stdio.h> functions
+			 *        to the given AOA interface.
+			 *        \n\n
+			 *
+			 *  \note This function is not available on all microcontroller architectures.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class configuration and state.
+			 *  \param[in,out] Stream            Pointer to a FILE structure where the created stream should be placed.
+			 */
+			void AOA_Host_CreateStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                           FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+
+			/** Identical to \ref AOA_Host_CreateStream(), except that reads are blocking until the calling stream function terminates
+			 *  the transfer. While blocking, the USB and AOA service tasks are called repeatedly to maintain USB communications.
+			 *
+			 *  \note This function is not available on all microcontroller architectures.
+			 *
+			 *  \param[in,out] AOAInterfaceInfo  Pointer to a structure containing a AOA Class configuration and state.
+			 *  \param[in,out] Stream            Pointer to a FILE structure where the created stream should be placed.
+			 */
+			void AOA_Host_CreateBlockingStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                                   FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* Function Prototypes: */
+			#if defined(__INCLUDE_FROM_ANDROIDACCESSORY_HOST_C)
+				#if defined(FDEV_SETUP_STREAM)
+				static int AOA_Host_putchar(char c,
+				                            FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
+				static int AOA_Host_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
+				static int AOA_Host_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
+				#endif
+
+				static uint8_t AOA_Host_GetAccessoryProtocol(uint16_t* const Protocol) ATTR_NON_NULL_PTR_ARG(1);
+				static uint8_t AOA_Host_SendPropertyString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo,
+			                                               const uint8_t StringIndex) ATTR_NON_NULL_PTR_ARG(1);
+
+				static uint8_t DCOMP_AOA_Host_NextAndroidAccessoryInterface(void* const CurrentDescriptor)
+				                                                            ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
+				static uint8_t DCOMP_AOA_Host_NextInterfaceBulkEndpoint(void* const CurrentDescriptor)
+				                                                        ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
+			#endif
+	#endif
+
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+
+#endif
+
+/** @} */
+
+