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317 lines
16 KiB
317 lines
16 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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* \brief Host mode driver for the library USB HID Class driver.
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*
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* Host mode driver for the library USB HID Class driver.
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*
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* \note This file should not be included directly. It is automatically included as needed by the USB module driver
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* dispatch header located in LUFA/Drivers/USB.h.
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*/
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/** \ingroup Group_USBClassHID
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* @defgroup Group_USBClassHIDHost HID Class Host Mode Driver
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*
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* \section Sec_Dependencies Module Source Dependencies
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* The following files must be built with any user project that uses this module:
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* - LUFA/Drivers/USB/Class/Host/HID.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
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* - LUFA/Drivers/USB/Class/Host/HIDParser.c <i>(Makefile source module name: LUFA_SRC_USB)</i>
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*
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* \section Module Description
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* Host Mode USB Class driver framework interface, for the HID USB Class driver.
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*
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* @{
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*/
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#ifndef __HID_CLASS_HOST_H__
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#define __HID_CLASS_HOST_H__
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/* Includes: */
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#include "../../USB.h"
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#include "../Common/HID.h"
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#include "HIDParser.h"
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Preprocessor Checks: */
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#if !defined(__INCLUDE_FROM_HID_DRIVER)
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#error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
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#endif
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#if defined(__INCLUDE_FROM_HID_HOST_C) && defined(NO_STREAM_CALLBACKS)
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#error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
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#endif
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/* Public Interface - May be used in end-application: */
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/* Macros: */
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/** Error code for some HID Host functions, indicating a logical (and not hardware) error. */
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#define HID_ERROR_LOGICAL 0x80
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/* Type Defines: */
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/** \brief HID Class Host Mode Configuration and State Structure.
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*
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* Class state structure. An instance of this structure should be made within the user application,
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* and passed to each of the HID class driver functions as the HIDInterfaceInfo parameter. This
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* stores each HID interface's configuration and state information.
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*/
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typedef struct
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{
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const struct
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{
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uint8_t DataINPipeNumber; /**< Pipe number of the HID interface's IN data pipe. */
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bool DataINPipeDoubleBank; /**< Indicates if the HID interface's IN data pipe should use double banking. */
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uint8_t DataOUTPipeNumber; /**< Pipe number of the HID interface's OUT data pipe. */
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bool DataOUTPipeDoubleBank; /**< Indicates if the HID interface's OUT data pipe should use double banking. */
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uint8_t HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific
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* boot subclass protocol is required, a protocol value from the
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* \ref HID_Descriptor_ClassSubclassProtocol_t enum.
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*/
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#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
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HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
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* is not used.
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*
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* \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined,
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* this method is unavailable.
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*/
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#endif
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} Config; /**< Config data for the USB class interface within the device. All elements in this section
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* <b>must</b> be set or the interface will fail to enumerate and operate correctly.
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*/
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struct
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{
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bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
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* after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
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* Configured state.
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*/
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uint8_t InterfaceNumber; /**< Interface index of the HID interface within the attached device. */
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uint16_t DataINPipeSize; /**< Size in bytes of the HID interface's IN data pipe. */
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uint16_t DataOUTPipeSize; /**< Size in bytes of the HID interface's OUT data pipe. */
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bool SupportsBootProtocol; /**< Indicates if the current interface instance supports the HID Boot
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* Protocol when enabled via \ref HID_Host_SetBootProtocol().
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*/
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bool DeviceUsesOUTPipe; /**< Indicates if the current interface instance uses a separate OUT data pipe for
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* OUT reports, or if OUT reports are sent via the control pipe instead.
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*/
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bool UsingBootProtocol; /**< Indicates that the interface is currently initialized in Boot Protocol mode */
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uint16_t HIDReportSize; /**< Size in bytes of the HID report descriptor in the device. */
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uint8_t LargestReportSize; /**< Largest report the device will send, in bytes. */
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} State; /**< State data for the USB class interface within the device. All elements in this section
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* <b>may</b> be set to initial values, but may also be ignored to default to sane values when
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* the interface is enumerated.
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*/
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} USB_ClassInfo_HID_Host_t;
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/* Enums: */
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/** Enum for the possible error codes returned by the \ref HID_Host_ConfigurePipes() function. */
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enum HID_Host_EnumerationFailure_ErrorCodes_t
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{
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HID_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */
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HID_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */
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HID_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor. */
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};
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/* Function Prototypes: */
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/** Host interface configuration routine, to configure a given HID host interface instance using the Configuration
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* Descriptor read from an attached USB device. This function automatically updates the given HID Host instance's
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* state values and configures the pipes required to communicate with the interface if it is found within the
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* device. This should be called once after the stack has enumerated the attached device, while the host state
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* machine is in the Addressed state.
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*
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* \note The pipe index numbers as given in the interface's configuration structure must not overlap with any other
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* interface, or pipe bank corruption will occur. Gaps in the allocated pipe numbers or non-sequential indexes
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* within a single interface is allowed, but no two interfaces of any type have have interleaved pipe indexes.
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* \n\n
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*
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* \note Once the device pipes are configured, the HID device's reporting protocol <b>must</b> be set via a call
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* to either the \ref HID_Host_SetBootProtocol() or \ref HID_Host_SetReportProtocol() function.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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* \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor.
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* \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor.
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*
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* \return A value from the \ref HID_Host_EnumerationFailure_ErrorCodes_t enum.
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*/
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uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
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uint16_t ConfigDescriptorSize,
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void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
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/** Receives a HID IN report from the attached HID device, when a report has been received on the HID IN Data pipe.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \note The destination buffer should be large enough to accommodate the largest report that the attached device
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* can generate.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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* \param[in] Buffer Buffer to store the received report into.
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*
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* \return An error code from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
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*/
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uint8_t HID_Host_ReceiveReport(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
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void* Buffer) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
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#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
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/** Receives a HID IN report from the attached device, by the report ID.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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* \param[in] ReportID Report ID of the received report if ControlRequest is false, set by the to the Report ID to fetch.
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* \param[in] Buffer Buffer to store the received report into.
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
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*/
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uint8_t HID_Host_ReceiveReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
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const uint8_t ReportID,
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void* Buffer) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
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#endif
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/** Sends an OUT or FEATURE report to the currently attached HID device, using the device's OUT pipe if available,
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* or the device's Control pipe if not.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, the ReportID parameter is removed
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* from the parameter list of this function.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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* \param[in] ReportID Report ID of the report to send to the device, or 0 if the device does not use report IDs.
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* \param[in] ReportType Type of report to issue to the device, either \ref HID_REPORT_ITEM_Out or \ref HID_REPORT_ITEM_Feature.
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* \param[in] Buffer Buffer containing the report to send to the attached device.
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* \param[in] ReportSize Report size in bytes to send to the attached device.
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*
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* \return An error code from the \ref USB_Host_SendControlErrorCodes_t enum if the DeviceUsesOUTPipe flag is set in
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* the interface's state structure, a value from the \ref Pipe_Stream_RW_ErrorCodes_t enum otherwise.
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*/
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uint8_t HID_Host_SendReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
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#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
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const uint8_t ReportID,
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#endif
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const uint8_t ReportType,
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void* Buffer,
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const uint16_t ReportSize) ATTR_NON_NULL_PTR_ARG(1)
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#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
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ATTR_NON_NULL_PTR_ARG(4);
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#else
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ATTR_NON_NULL_PTR_ARG(3);
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#endif
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/** Determines if a HID IN report has been received from the attached device on the data IN pipe.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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*
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* \return Boolean true if a report has been received, false otherwise.
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*/
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bool HID_Host_IsReportReceived(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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/** Switches the attached HID device's reporting protocol over to the Boot Report protocol mode, on supported devices.
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*
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* \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method must still be called
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* to explicitly place the attached device into boot protocol mode before use.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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*
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* \return \ref HID_ERROR_LOGICAL if the device does not support Boot Protocol mode, a value from the
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* \ref USB_Host_SendControlErrorCodes_t enum otherwise.
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*/
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uint8_t HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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#if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
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/** Switches the attached HID device's reporting protocol over to the standard Report protocol mode. This also retrieves
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* and parses the device's HID report descriptor, so that the size of each report can be determined in advance.
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*
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* \note Whether this function is used or not, the \ref CALLBACK_HIDParser_FilterHIDReportItem() callback from the HID
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* Report Parser this function references <b>must</b> be implemented in the user code.
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* \n\n
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*
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* \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum if an error occurs while retrieving the HID
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* Report descriptor or the setting of the Report protocol, \ref HID_ERROR_LOGICAL if the HID interface does
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* not have a valid \ref HID_ReportInfo_t structure set in its configuration, a mask of \ref HID_ERROR_LOGICAL
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* and a value from the \ref HID_Parse_ErrorCodes_t otherwise.
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*/
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uint8_t HID_Host_SetReportProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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#endif
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/* Inline Functions: */
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/** General management task for a given Human Interface Class host class interface, required for the correct operation of
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* the interface. This should be called frequently in the main program loop, before the master USB management task
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* \ref USB_USBTask().
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*
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* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state.
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*/
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static inline void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo);
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static inline void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo)
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{
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(void)HIDInterfaceInfo;
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}
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/* Private Interface - For use in library only: */
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#if !defined(__DOXYGEN__)
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/* Function Prototypes: */
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#if defined(__INCLUDE_FROM_HID_HOST_C)
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static uint8_t DCOMP_HID_Host_NextHIDInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
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static uint8_t DCOMP_HID_Host_NextHID(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
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static uint8_t DCOMP_HID_Host_NextHIDInterfaceEndpoint(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
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#endif
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#endif
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/* Disable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/** @} */
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