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                                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
  81                                         HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
  82                                                                           *   is not used
  83                                                                                                           *
  84                                                                           *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined,
  85                                                                           *        this method is unavailable.
  86                                                                           */
  87                                         #endif
  88                                 } Config; /**< Config data for the USB class interface within the device. All elements in this section
  89                                            *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
  90                                            */
  91                                 struct
  92                                 {
  93                                         bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
  94                                                         *   after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
  95                                                         *   Configured state
  96                                                         */
  97                                         uint8_t InterfaceNumber; /**< Interface index of the HID interface within the attached device */
  98
  99                                         uint16_t DataINPipeSize; /**< Size in bytes of the HID interface's IN data pipe */
 100                                         uint16_t DataOUTPipeSize;  /**< Size in bytes of the HID interface's OUT data pipe */
 101
 102                                         bool SupportsBootProtocol; /**< Indicates if the current interface instance supports the HID Boot
 103                                                                     *   Protocol when enabled via \ref HID_Host_SetBootProtocol()
 104                                                                     */
 105                                         bool DeviceUsesOUTPipe; /**< Indicates if the current interface instance uses a seperate OUT data pipe for
 106                                                                  *   OUT reports, or if OUT reports are sent via the control pipe instead.
 107                                                                  */
 108                                         bool UsingBootProtocol; /**< Indicates that the interface is currently initialised in Boot Protocol mode */
 109                                         uint16_t HIDReportSize; /**< Size in bytes of the HID report descriptor in the device */
 110
 111                                         uint8_t LargestReportSize; /**< Largest report the device will send, in bytes */
 112                                 } State; /**< State data for the USB class interface within the device. All elements in this section
 113                                                   *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
 114                                                   *   the interface is enumerated.
 115                                                   */
 116                         } USB_ClassInfo_HID_Host_t;
 117
 118                 /* Enums: */
 119                         /** Enum for the possible error codes returned by the \ref HID_Host_ConfigurePipes() function. */
 120                         enum HIDHost_EnumerationFailure_ErrorCodes_t
 121                         {
 122                                 HID_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully */
 123                                 HID_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor */
 124                                 HID_ENUMERROR_NoHIDInterfaceFound        = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor */
 125                                 HID_ENUMERROR_NoHIDDescriptorFound       = 3, /**< The HID descriptor was not found in the device's HID interface */
 126                                 HID_ENUMERROR_EndpointsNotFound          = 4, /**< Compatible HID endpoints were not found in the device's HID interface */
 127                         };
 128
 129                 /* Function Prototypes: */
 130                         /** General management task for a given Human Interface Class host class interface, required for the correct operation of
 131                          *  the interface. This should be called frequently in the main program loop, before the master USB management task
 132                          *  \ref USB_USBTask().
 133                          *
 134                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 135                          */
 136                         void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 137
 138                         /** Host interface configuration routine, to configure a given HID host interface instance using the Configuration
 139                          *  Descriptor read from an attached USB device. This function automatically updates the given HID Host instance's
 140                          *  state values and configures the pipes required to communicate with the interface if it is found within the
 141                          *  device. This should be called once after the stack has enumerated the attached device, while the host state
 142                          *  machine is in the Addressed state.
 143                          *
 144                          *  \note Once the device pipes are configured, the HID device's reporting protocol <b>must</b> be set via a call
 145                          *        to either the \ref HID_Host_SetBootProtocol() or \ref HID_Host_SetReportProtocol() function.
 146                          *
 147                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 148                          *  \param[in] ConfigDescriptorSize  Length of the attached device's Configuration Descriptor
 149                          *  \param[in] DeviceConfigDescriptor  Pointer to a buffer containing the attached device's Configuration Descriptor
 150                          *
 151                          *  \return A value from the \ref HIDHost_EnumerationFailure_ErrorCodes_t enum
 152                          */
 153                         uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo, uint16_t ConfigDescriptorSize,
 154                                                         uint8_t* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1, 3);
 155
 156
 157                         /** Receives a HID IN report from the attached HID device, when a report has been received on the HID IN Data pipe.
 158                          *
 159                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 160                          *  \param[in] Buffer  Buffer to store the received report into
 161                          *
 162                          *  \return An error code from the \ref Pipe_Stream_RW_ErrorCodes_t enum
 163                          */
 164                         uint8_t HID_Host_ReceiveReport(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo, void* Buffer) ATTR_NON_NULL_PTR_ARG(1, 2);
 165
 166                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 167                         /** Received a HID IN report from the attached device, by the report ID.
 168                          *
 169                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
 170                          *
 171                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 172                          *  \param[in] ReportID  Report ID of the received report if ControlRequest is false, set by the to the Report ID to fetch
 173                          *  \param[in] Buffer  Buffer to store the received report into
 174                          *
 175                          *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum
 176                          */
 177                         uint8_t HID_Host_ReceiveReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo, const uint8_t ReportID,
 178                                                            void* Buffer) ATTR_NON_NULL_PTR_ARG(1, 3);
 179                         #endif
 180
 181                         /** Sends an OUT report to the currently attached HID device, using the device's OUT pipe if available or the device's
 182                          *  Control pipe if not.
 183                          *
 184                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, the ReportID parameter is removed
 185                          *        from the parameter list of this function.
 186                          *
 187                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 188                          *  \param[in] ReportID  Report ID of the report to send to the device, or 0 if the device does not use report IDs
 189                          *  \param[in] Buffer  Buffer containing the report to send to the attached device
 190                          *  \param[in] ReportSize  Report size in bytes to send to the attached device
 191                          *
 192                          *  \return An error code from the \ref USB_Host_SendControlErrorCodes_t enum if the DeviceUsesOUTPipe flag is set in
 193                          *          the interface's state structure, a value from the \ref Pipe_Stream_RW_ErrorCodes_t enum otherwise
 194                          */
 195                         uint8_t HID_Host_SendReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
 196                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 197                                                         const uint8_t ReportID,
 198                         #endif
 199                                                         void* Buffer, const uint16_t ReportSize)
 200                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 201                                                         ATTR_NON_NULL_PTR_ARG(1, 3);
 202                         #else
 203                                                         ATTR_NON_NULL_PTR_ARG(1, 2);
 204                         #endif
 205
 206                         /** Determines if a HID IN report has been received from the attached device on the data IN pipe.
 207                          *
 208                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 209                          *
 210                          *  \return Boolean true if a report has been received, false otherwise
 211                          */
 212                         bool HID_Host_IsReportReceived(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 213
 214                         /** Switches the attached HID device's reporting protocol over to the Boot Report protocol mode, on supported devices.
 215                          *
 216                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method must still be called
 217                          *        to explicitly place the attached device into boot protocol mode before use.
 218                          *
 219                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 220                          *
 221                          *  \return \ref HID_ERROR_LOGICAL if the device does not support Boot Protocol mode, a value from the
 222                          *          \ref USB_Host_SendControlErrorCodes_t enum otherwise
 223                          */
 224                         uint8_t HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 225
 226                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 227                         /** Switches the attached HID device's reporting protocol over to the standard Report protocol mode. This also retrieves
 228                          *  and parses the device's HID report descriptor, so that the size of each report can be determined in advance.
 229                          *
 230                          *  \note Whether this function is used or not, the \ref CALLBACK_HIDParser_FilterHIDReportItem() callback from the HID
 231                          *        Report Parser this function references <b>must</b> be implemented in the user code.
 232                          *
 233                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
 234                          *
 235                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state
 236                          *
 237                          *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum if an error occurs while retrieving the HID
 238                          *          Report descriptor or the setting of the Report protocol, \ref HID_ERROR_LOGICAL if the HID interface does
 239                          *          not have a valid \ref HID_ReportInfo_t structure set in its configuration, a mask of \ref HID_ERROR_LOGICAL
 240                          *          and a value from the \ref HID_Parse_ErrorCodes_t otherwise
 241                          */
 242                         uint8_t HID_Host_SetReportProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 243                         #endif
 244
 245         /* Private Interface - For use in library only: */
 246         #if !defined(__DOXYGEN__)
 247                 /* Macros: */
 248                         #define HID_INTERFACE_CLASS             0x03
 249
 250                         #define HID_FOUND_DATAPIPE_IN           (1 << 0)
 251                         #define HID_FOUND_DATAPIPE_OUT          (1 << 1)
 252
 253                 /* Function Prototypes: */
 254                         #if defined(INCLUDE_FROM_HID_CLASS_HOST_C)
 255                                 static uint8_t DComp_HID_Host_NextHIDInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 256                                 static uint8_t DComp_NextHID(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 257                                 static uint8_t DComp_HID_Host_NextHIDInterfaceEndpoint(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 258                         #endif
 259         #endif
 260
 261         /* Disable C linkage for C++ Compilers: */
 262                 #if defined(__cplusplus)
 263                         }
 264                 #endif
 265
 266 #endif
 267
 268 /** @} */