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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 /** \file
  32  *  \brief Host mode driver for the library USB HID Class driver.
  33  *
  34  *  Host mode driver for the library USB HID Class driver.
  35  *
  36  *  \note This file should not be included directly. It is automatically included as needed by the USB module driver
  37  *        dispatch header located in LUFA/Drivers/USB.h.
  38  */
  39
  40 /** \ingroup Group_USBClassHID
  41  *  @defgroup Group_USBClassHIDHost HID Class Host Mode Driver
  42  *
  43  *  \section Sec_Dependencies Module Source Dependencies
  44  *  The following files must be built with any user project that uses this module:
  45  *    - LUFA/Drivers/USB/Class/Host/HID.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
  46  *    - LUFA/Drivers/USB/Class/Host/HIDParser.c <i>(Makefile source module name: LUFA_SRC_USB)</i>
  47  *
  48  *  \section Module Description
  49  *  Host Mode USB Class driver framework interface, for the HID USB Class driver.
  50  *
  51  *  @{
  52  */
  53
  54 #ifndef __HID_CLASS_HOST_H__
  55 #define __HID_CLASS_HOST_H__
  56
  57         /* Includes: */
  58                 #include "../../USB.h"
  59                 #include "../Common/HID.h"
  60                 #include "HIDParser.h"
  61
  62         /* Enable C linkage for C++ Compilers: */
  63                 #if defined(__cplusplus)
  64                         extern "C" {
  65                 #endif
  66
  67         /* Preprocessor Checks: */
  68                 #if !defined(__INCLUDE_FROM_HID_DRIVER)
  69                         #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
  70                 #endif
  71
  72                 #if defined(__INCLUDE_FROM_HID_HOST_C) && defined(NO_STREAM_CALLBACKS)
  73                         #error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
  74                 #endif
  75
  76
  77         /* Public Interface - May be used in end-application: */
  78                 /* Macros: */
  79                         /** Error code for some HID Host functions, indicating a logical (and not hardware) error. */
  80                         #define HID_ERROR_LOGICAL              0x80
  81
  82                 /* Type Defines: */
  83                         /** \brief HID Class Host Mode Configuration and State Structure.
  84                          *
  85                          *  Class state structure. An instance of this structure should be made within the user application,
  86                          *  and passed to each of the HID class driver functions as the HIDInterfaceInfo parameter. This
  87                          *  stores each HID interface's configuration and state information.
  88                          */
  89                         typedef struct
  90                         {
  91                                 const struct
  92                                 {
  93                                         uint8_t  DataINPipeNumber; /**< Pipe number of the HID interface's IN data pipe. */
  94                                         bool     DataINPipeDoubleBank; /**< Indicates if the HID interface's IN data pipe should use double banking. */
  95
  96                                         uint8_t  DataOUTPipeNumber; /**< Pipe number of the HID interface's OUT data pipe. */
  97                                         bool     DataOUTPipeDoubleBank; /**< Indicates if the HID interface's OUT data pipe should use double banking. */
  98
  99                                         uint8_t  HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific
 100                                                                         *   boot subclass protocol is required, a protocol value from the
 101                                                                         *   \ref HID_Descriptor_ClassSubclassProtocol_t enum.
 102                                                                         */
 103                                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 104                                         HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
 105                                                                           *   is not used.
 106                                                                                                           *
 107                                                                           *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined,
 108                                                                           *        this method is unavailable.
 109                                                                           */
 110                                         #endif
 111                                 } Config; /**< Config data for the USB class interface within the device. All elements in this section
 112                                            *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
 113                                            */
 114                                 struct
 115                                 {
 116                                         bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
 117                                                         *   after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
 118                                                         *   Configured state.
 119                                                         */
 120                                         uint8_t InterfaceNumber; /**< Interface index of the HID interface within the attached device. */
 121
 122                                         uint16_t DataINPipeSize; /**< Size in bytes of the HID interface's IN data pipe. */
 123                                         uint16_t DataOUTPipeSize;  /**< Size in bytes of the HID interface's OUT data pipe. */
 124
 125                                         bool SupportsBootProtocol; /**< Indicates if the current interface instance supports the HID Boot
 126                                                                     *   Protocol when enabled via \ref HID_Host_SetBootProtocol().
 127                                                                     */
 128                                         bool DeviceUsesOUTPipe; /**< Indicates if the current interface instance uses a separate OUT data pipe for
 129                                                                  *   OUT reports, or if OUT reports are sent via the control pipe instead.
 130                                                                  */
 131                                         bool UsingBootProtocol; /**< Indicates that the interface is currently initialized in Boot Protocol mode */
 132                                         uint16_t HIDReportSize; /**< Size in bytes of the HID report descriptor in the device. */
 133
 134                                         uint8_t LargestReportSize; /**< Largest report the device will send, in bytes. */
 135                                 } State; /**< State data for the USB class interface within the device. All elements in this section
 136                                                   *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
 137                                                   *   the interface is enumerated.
 138                                                   */
 139                         } USB_ClassInfo_HID_Host_t;
 140
 141                 /* Enums: */
 142                         /** Enum for the possible error codes returned by the \ref HID_Host_ConfigurePipes() function. */
 143                         enum HID_Host_EnumerationFailure_ErrorCodes_t
 144                         {
 145                                 HID_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 146                                 HID_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 147                                 HID_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor. */
 148                                 HID_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 149                         };
 150
 151                 /* Function Prototypes: */
 152                         /** Host interface configuration routine, to configure a given HID host interface instance using the Configuration
 153                          *  Descriptor read from an attached USB device. This function automatically updates the given HID Host instance's
 154                          *  state values and configures the pipes required to communicate with the interface if it is found within the
 155                          *  device. This should be called once after the stack has enumerated the attached device, while the host state
 156                          *  machine is in the Addressed state.
 157                          *
 158                          *  \note The pipe index numbers as given in the interface's configuration structure must not overlap with any other
 159                          *        interface, or pipe bank corruption will occur. Gaps in the allocated pipe numbers or non-sequential indexes
 160                          *        within a single interface is allowed, but no two interfaces of any type have have interleaved pipe indexes.
 161                          *        \n\n
 162                          *
 163                          *  \note Once the device pipes are configured, the HID device's reporting protocol <b>must</b> be set via a call
 164                          *        to either the \ref HID_Host_SetBootProtocol() or \ref HID_Host_SetReportProtocol() function.
 165                          *
 166                          *  \param[in,out] HIDInterfaceInfo        Pointer to a structure containing a HID Class host configuration and state.
 167                          *  \param[in]     ConfigDescriptorSize    Length of the attached device's Configuration Descriptor.
 168                          *  \param[in]     DeviceConfigDescriptor  Pointer to a buffer containing the attached device's Configuration Descriptor.
 169                          *
 170                          *  \return A value from the \ref HID_Host_EnumerationFailure_ErrorCodes_t enum.
 171                          */
 172                         uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
 173                                                         uint16_t ConfigDescriptorSize,
 174                                                         void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
 175
 176
 177                         /** Receives a HID IN report from the attached HID device, when a report has been received on the HID IN Data pipe.
 178                          *
 179                          *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
 180                          *       call will fail.
 181                          *
 182                          *  \note The destination buffer should be large enough to accommodate the largest report that the attached device
 183                          *        can generate.
 184                          *
 185                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 186                          *  \param[in]     Buffer            Buffer to store the received report into.
 187                          *
 188                          *  \return An error code from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
 189                          */
 190                         uint8_t HID_Host_ReceiveReport(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
 191                                                        void* Buffer) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
 192
 193                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 194                         /** Receives a HID IN report from the attached device, by the report ID.
 195                          *
 196                          *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
 197                          *       call will fail.
 198                          *
 199                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
 200                          *
 201                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 202                          *  \param[in]     ReportID          Report ID of the received report if ControlRequest is false, set by the to the Report ID to fetch.
 203                          *  \param[in]     Buffer            Buffer to store the received report into.
 204                          *
 205                          *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
 206                          */
 207                         uint8_t HID_Host_ReceiveReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
 208                                                            const uint8_t ReportID,
 209                                                            void* Buffer) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
 210                         #endif
 211
 212                         /** Sends an OUT or FEATURE report to the currently attached HID device, using the device's OUT pipe if available,
 213                          *  or the device's Control pipe if not.
 214                          *
 215                          *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
 216                          *       call will fail.
 217                          *
 218                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, the ReportID parameter is removed
 219                          *        from the parameter list of this function.
 220                          *
 221                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 222                          *  \param[in]     ReportID          Report ID of the report to send to the device, or 0 if the device does not use report IDs.
 223                          *  \param[in]     ReportType        Type of report to issue to the device, either \ref HID_REPORT_ITEM_Out or \ref HID_REPORT_ITEM_Feature.
 224                          *  \param[in]     Buffer            Buffer containing the report to send to the attached device.
 225                          *  \param[in]     ReportSize        Report size in bytes to send to the attached device.
 226                          *
 227                          *  \return An error code from the \ref USB_Host_SendControlErrorCodes_t enum if the DeviceUsesOUTPipe flag is set in
 228                          *          the interface's state structure, a value from the \ref Pipe_Stream_RW_ErrorCodes_t enum otherwise.
 229                          */
 230                         uint8_t HID_Host_SendReportByID(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo,
 231                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 232                                                         const uint8_t ReportID,
 233                         #endif
 234                                                         const uint8_t ReportType,
 235                                                         void* Buffer,
 236                                                         const uint16_t ReportSize) ATTR_NON_NULL_PTR_ARG(1)
 237                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 238                                                         ATTR_NON_NULL_PTR_ARG(4);
 239                         #else
 240                                                         ATTR_NON_NULL_PTR_ARG(3);
 241                         #endif
 242
 243                         /** Determines if a HID IN report has been received from the attached device on the data IN pipe.
 244                          *
 245                          *  \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
 246                          *       call will fail.
 247                          *
 248                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 249                          *
 250                          *  \return Boolean true if a report has been received, false otherwise.
 251                          */
 252                         bool HID_Host_IsReportReceived(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 253
 254                         /** Switches the attached HID device's reporting protocol over to the Boot Report protocol mode, on supported devices.
 255                          *
 256                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method must still be called
 257                          *        to explicitly place the attached device into boot protocol mode before use.
 258                          *
 259                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 260                          *
 261                          *  \return \ref HID_ERROR_LOGICAL if the device does not support Boot Protocol mode, a value from the
 262                          *          \ref USB_Host_SendControlErrorCodes_t enum otherwise.
 263                          */
 264                         uint8_t HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 265
 266                         #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
 267                         /** Switches the attached HID device's reporting protocol over to the standard Report protocol mode. This also retrieves
 268                          *  and parses the device's HID report descriptor, so that the size of each report can be determined in advance.
 269                          *
 270                          *  \note Whether this function is used or not, the \ref CALLBACK_HIDParser_FilterHIDReportItem() callback from the HID
 271                          *        Report Parser this function references <b>must</b> be implemented in the user code.
 272                          *        \n\n
 273                          *
 274                          *  \note When the HID_HOST_BOOT_PROTOCOL_ONLY compile time token is defined, this method is unavailable.
 275                          *
 276                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 277                          *
 278                          *  \return A value from the \ref USB_Host_SendControlErrorCodes_t enum if an error occurs while retrieving the HID
 279                          *          Report descriptor or the setting of the Report protocol, \ref HID_ERROR_LOGICAL if the HID interface does
 280                          *          not have a valid \ref HID_ReportInfo_t structure set in its configuration, a mask of \ref HID_ERROR_LOGICAL
 281                          *          and a value from the \ref HID_Parse_ErrorCodes_t otherwise.
 282                          */
 283                         uint8_t HID_Host_SetReportProtocol(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
 284                         #endif
 285
 286                 /* Inline Functions: */
 287                         /** General management task for a given Human Interface Class host class interface, required for the correct operation of
 288                          *  the interface. This should be called frequently in the main program loop, before the master USB management task
 289                          *  \ref USB_USBTask().
 290                          *
 291                          *  \param[in,out] HIDInterfaceInfo  Pointer to a structure containing a HID Class host configuration and state.
 292                          */
 293                         static inline void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo);
 294                         static inline void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo)
 295                         {
 296                                 (void)HIDInterfaceInfo;
 297                         }
 298
 299         /* Private Interface - For use in library only: */
 300         #if !defined(__DOXYGEN__)
 301                 /* Function Prototypes: */
 302                         #if defined(__INCLUDE_FROM_HID_HOST_C)
 303                                 static uint8_t DCOMP_HID_Host_NextHIDInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 304                                 static uint8_t DCOMP_HID_Host_NextHID(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 305                                 static uint8_t DCOMP_HID_Host_NextHIDInterfaceEndpoint(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
 306                         #endif
 307         #endif
 308
 309         /* Disable C linkage for C++ Compilers: */
 310                 #if defined(__cplusplus)
 311                         }
 312                 #endif
 313
 314 #endif
 315
 316 /** @} */
 317