LUFA/Drivers/USB/Class/Host/HID.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \ingroup Group_USBClassHID
  32  *  @defgroup Group_USBClassHIDHost HID Class Host Mode Driver
  33  *
  34  *  \section Sec_Dependencies Module Source Dependencies
  35  *  The following files must be built with any user project that uses this module:
  36  *    - LUFA/Drivers/USB/Class/Host/HID.c
  37  *    - LUFA/Drivers/USB/Class/Host/HIDParser.c
  38  *
  39  *  \section Module Description
  40  *  Host Mode USB Class driver framework interface, for the HID USB Class driver.
  41  *
  42  *  @{
  43  */
  44
  45 #ifndef __HID_CLASS_HOST_H__
  46 #define __HID_CLASS_HOST_H__
  47
  48         /* Includes: */
  49                 #include "../../USB.h"
  50                 #include "../Common/HID.h"
  51                 #include "HIDParser.h"
  52
  53         /* Enable C linkage for C++ Compilers: */
  54                 #if defined(__cplusplus)
  55                         extern "C" {
  56                 #endif
  57
  58         /* Public Interface - May be used in end-application: */
  59                 /* Macros: */
  60                         /** Error code for some HID Host functions, indicating a logical (and not hardware) error */
  61                         #define HID_ERROR_LOGICAL              0x80
  62
  63                 /* Type Defines: */
  64                         /** Class state structure. An instance of this structure should be made within the user application,
  65                          *  and passed to each of the HID class driver functions as the HIDInterfaceInfo parameter. This
  66                          *  stores each HID interface's configuration and state information.
  67                          */
  68                         typedef struct
  69                         {
  70                                 const struct
  71                                 {
  72                                         uint8_t  DataINPipeNumber; /**< Pipe number of the HID interface's IN data pipe */
  73                                         uint8_t  DataOUTPipeNumber; /**< Pipe number of the HID interface's OUT data pipe */
  74
  75                                         uint8_t  HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific
  76                                                                         *   boot subclass protocol is required, either \ref HID_BOOT_MOUSE_PROTOCOL,
  77                                                                                                         *   \ref HID_BOOT_KEYBOARD_PROTOCOL or \ref HID_NON_BOOT_PROTOCOL if any
  78                                                                                                         *   HID device should be enumerated by the interface
  79                                                                         */
  80                                         HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
  81                                                                           *   is not used */
  82                                 } Config; /**< Config data for the USB class interface within the device. All elements in this section
  83                                            *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
  84                                            */
  85                                 struct
  86                                 {
  87                                         bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
  88                                                         *   after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
  89                                                         *   Configured state
  90                                                         */
  91                                         uint8_t InterfaceNumber; /**< Interface index of the HID interface within the attached device */
  92
  93                                         uint16_t DataINPipeSize; /**< Size in bytes of the HID interface's IN data pipe */
  94                                         uint16_t DataOUTPipeSize;  /**< Size in bytes of the HID interface's OUT data pipe */
  95
  96                                         bool SupportsBootProtocol; /**< Indicates if the current interface instance supports the HID Boot
  97                                                                     *   Protocol when enabled via \ref USB_HID_Host_SetBootProtocol()
  98                                                                     */
  99                                         bool DeviceUsesOUTPipe; /**< Indicates if the current interface instance uses a seperate OUT data pipe for
 100                                                                  *   OUT reports, or if OUT reports are sent via the control pipe instead.
 101                                                                  */
 102                                         bool UsingBootProtocol; /**< Indicates that the interface is currently initialised in Boot Protocol mode */
 103                                         uint16_t HIDReportSize; /**< Size in bytes of the HID report descriptor in the device */
 104                                 } State; /**< State data for the USB class interface within the device. All elements in this section
 105                                                   *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
 106                                                   *   the interface is enumerated.
 107                                                   */
 108                         } USB_ClassInfo_HID_Host_t;
 109
 110                 /* Enums: */
 111                         /** Enum for the possible error codes returned by the \ref HID_Host_ConfigurePipes() function. */
 112                         enum HIDHost_EnumerationFailure_ErrorCodes_t
 113                         {
 114                                 HID_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully */
 115                                 HID_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor */
 116                                 HID_ENUMERROR_NoHIDInterfaceFound        = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor */
 117                                 HID_ENUMERROR_NoHIDDescriptorFound       = 3, /**< The HID descriptor was not found in the device's HID interface */
 118                                 HID_ENUMERROR_EndpointsNotFound          = 4, /**< Compatible HID endpoints were not found in the device's HID interface */
 119                         };
 120
 121                 /* Function Prototypes: */
 122                         /** General management task for a given Human Interface Class host class interface, required for the correct operation of
 123                          *  the interface. This should be called frequently in the main program loop, before the master USB management task
 124                          *  \ref USB_USBTask().
 125                          *
 126                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 127                          */
 128                         void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 129
 130                         /** Host interface configuration routine, to configure a given HID host interface instance using the Configuration
 131                          *  Descriptor read from an attached USB device. This function automatically updates the given HID Host instance's
 132                          *  state values and configures the pipes required to communicate with the interface if it is found within the
 133                          *  device. This should be called once after the stack has enumerated the attached device, while the host state
 134                          *  machine is in the Addressed state.
 135                          *
 136                          *  \note Once the device pipes are configured, the HID device's reporting protocol <b>must</b> be set via a call
 137                          *        to either the \ref USB_HID_Host_SetBootProtocol() or \ref USB_HID_Host_SetReportProtocol() function.
 138                          *
 139                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 140                          *  \param[in] ConfigDescriptorLength  Length of the attached device's Configuration Descriptor
 141                          *  \param[in] DeviceConfigDescriptor  Pointer to a buffer containing the attached device's Configuration Descriptor
 142                          *
 143                          *  \return A value from the \ref HIDHost_EnumerationFailure_ErrorCodes_t enum
 144                          */
 145                         uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo, uint16_t ConfigDescriptorLength,
 146                                                         uint8_t* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1, 3);
 147
 148
 149                         /** Receives a HID IN report from the attached HID device, either the next report from the device's IN data pipe,
 150                          *  or a given report (by Report ID) if a specific report is desired.
 151                          *
 152                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 153                          *  \param[in] ControlRequest  Set to true if the report should be requested by a control request, false otherwise
 154                          *  \param[in,out] ReportID  Report ID of the received report if ControlRequest is false, set by the to the Report ID
 155                          *                           to fetch if ControlRequest is true
 156                          *  \param[in] Buffer  Buffer to store the received report into
 157                          *
 158                          *  \return An error code from the \ref USB_Host_SendControlErrorCodes_t enum if the ControlRequest flag is set,
 159                          *          a value from the \ref Pipe_Stream_RW_ErrorCodes_t enum otherwise
 160                          */
 161                         uint8_t HID_Host_ReceiveReport(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo, bool ControlRequest, uint8_t* ReportID,
 162                                                        void* Buffer) ATTR_NON_NULL_PTR_ARG(1, 3);
 163
 164                         /** Sends an OUT report to the currently attached HID device, using the device's OUT pipe if available or the device's
 165                          *  Control pipe if not.
 166                          *
 167                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 168                          *  \param[in] ReportID  Report ID of the report to send to the device, or 0 if the device does not use report IDs
 169                          *  \param[in] Buffer  Buffer containing the report to send to the attached device
 170                          *  \param[in] ReportSize  Report size in bytes to send to the attached device
 171                          *
 172                          *  \return An error code from the \ref USB_Host_SendControlErrorCodes_t enum if the DeviceUsesOUTPipe flag is set in
 173                          *          the interface's state structure, a value from the \ref Pipe_Stream_RW_ErrorCodes_t enum otherwise
 174                          */
 175                         uint8_t HID_Host_SendReport(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo, uint8_t ReportID,
 176                                                     void* Buffer, uint16_t ReportSize) ATTR_NON_NULL_PTR_ARG(1, 3);
 177
 178                         /** Determines if a HID IN report has been received from the attached device on the data IN pipe.
 179                          *
 180                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 181                          *
 182                          *  \return Boolean true if a report has been received, false otherwise
 183                          */
 184                         bool HID_Host_IsReportReceived(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 185
 186                         /** Switches the attached HID device's reporting protocol over to the Boot Report protocol mode, on supported devices.
 187                          *
 188                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 189                          *
 190                          *  \return \ref HID_ERROR_LOGICAL if the device does not support Boot Protocol mode, a value from the
 191                          *          \ref USB_Host_SendControlErrorCodes_t enum otherwise
 192                          */
 193                         uint8_t USB_HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 194
 195                         /** Switches the attached HID device's reporting protocol over to the standard Report protocol mode. This also retrieves
 196                          *  and parses the device's HID report descriptor, so that the size of each report can be determined in advance.
 197                          *
 198                          *  \note Whether this function is used or not, the \ref CALLBACK_HIDParser_FilterHIDReportItem() callback from the HID
 199                          *        Report Parser this function references <b>must</b> be implemented in the user code.
 200                          *
 201                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 202                          *
 203                          *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum if an error occurs while retrieving the HID
 204                          *          Report descriptor or the setting of the Report protocol, \ref HID_ERROR_LOGICAL if the HID interface does
 205                          *          not have a valid \ref HID_ReportInfo_t structure set in its configuration, a mask of \ref HID_ERROR_LOGICAL
 206                          *          and a value from the \ref HID_Parse_ErrorCodes_t otherwise
 207                          */
 208                         uint8_t USB_HID_Host_SetReportProtocol(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 209
 210         /* Private Interface - For use in library only: */
 211         #if !defined(__DOXYGEN__)
 212                 /* Macros: */
 213                         #define HID_INTERFACE_CLASS             0x03
 214
 215                         #define HID_FOUND_DATAPIPE_IN           (1 << 0)
 216                         #define HID_FOUND_DATAPIPE_OUT          (1 << 1)
 217
 218                 /* Function Prototypes: */
 219                         #if defined(INCLUDE_FROM_HID_CLASS_HOST_C)
 220                                 static uint8_t DComp_HID_Host_NextHIDInterface(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 221                                 static uint8_t DComp_NextHID(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 222                                 static uint8_t DComp_HID_Host_NextHIDInterfaceEndpoint(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 223                         #endif
 224         #endif
 225
 226         /* Disable C linkage for C++ Compilers: */
 227                 #if defined(__cplusplus)
 228                         }
 229                 #endif
 230
 231 #endif
 232
 233 /** @} */