LUFA/Drivers/USB/Class/Device/HIDClassDevice.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2015.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2015  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 disclaims 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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "../../Core/USBMode.h"
  33
  34 #if defined(USB_CAN_BE_DEVICE)
  35
  36 #define  __INCLUDE_FROM_HID_DRIVER
  37 #define  __INCLUDE_FROM_HID_DEVICE_C
  38 #include "HIDClassDevice.h"
  39
  40 void HID_Device_ProcessControlRequest(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
  41 {
  42         if (!(Endpoint_IsSETUPReceived()))
  43           return;
  44
  45         if (USB_ControlRequest.wIndex != HIDInterfaceInfo->Config.InterfaceNumber)
  46           return;
  47
  48         switch (USB_ControlRequest.bRequest)
  49         {
  50                 case HID_REQ_GetReport:
  51                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  52                         {
  53                                 uint16_t ReportSize = 0;
  54                                 uint8_t  ReportID   = (USB_ControlRequest.wValue & 0xFF);
  55                                 uint8_t  ReportType = (USB_ControlRequest.wValue >> 8) - 1;
  56                                 uint8_t  ReportData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
  57
  58                                 memset(ReportData, 0, sizeof(ReportData));
  59
  60                                 CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, ReportType, ReportData, &ReportSize);
  61
  62                                 if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
  63                                 {
  64                                         memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportData,
  65                                                HIDInterfaceInfo->Config.PrevReportINBufferSize);
  66                                 }
  67
  68                                 Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
  69
  70                                 Endpoint_ClearSETUP();
  71
  72                                 if (ReportID)
  73                                   Endpoint_Write_8(ReportID);
  74
  75                                 Endpoint_Write_Control_Stream_LE(ReportData, ReportSize);
  76                                 Endpoint_ClearOUT();
  77                         }
  78
  79                         break;
  80                 case HID_REQ_SetReport:
  81                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  82                         {
  83                                 uint16_t ReportSize = USB_ControlRequest.wLength;
  84                                 uint8_t  ReportID   = (USB_ControlRequest.wValue & 0xFF);
  85                                 uint8_t  ReportType = (USB_ControlRequest.wValue >> 8) - 1;
  86                                 uint8_t  ReportData[ReportSize];
  87
  88                                 Endpoint_ClearSETUP();
  89                                 Endpoint_Read_Control_Stream_LE(ReportData, ReportSize);
  90                                 Endpoint_ClearIN();
  91
  92                                 CALLBACK_HID_Device_ProcessHIDReport(HIDInterfaceInfo, ReportID, ReportType,
  93                                                                      &ReportData[ReportID ? 1 : 0], ReportSize - (ReportID ? 1 : 0));
  94                         }
  95
  96                         break;
  97                 case HID_REQ_GetProtocol:
  98                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  99                         {
 100                                 Endpoint_ClearSETUP();
 101                                 while (!(Endpoint_IsINReady()));
 102                                 Endpoint_Write_8(HIDInterfaceInfo->State.UsingReportProtocol);
 103                                 Endpoint_ClearIN();
 104                                 Endpoint_ClearStatusStage();
 105                         }
 106
 107                         break;
 108                 case HID_REQ_SetProtocol:
 109                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 110                         {
 111                                 Endpoint_ClearSETUP();
 112                                 Endpoint_ClearStatusStage();
 113
 114                                 HIDInterfaceInfo->State.UsingReportProtocol = ((USB_ControlRequest.wValue & 0xFF) != 0x00);
 115                         }
 116
 117                         break;
 118                 case HID_REQ_SetIdle:
 119                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 120                         {
 121                                 Endpoint_ClearSETUP();
 122                                 Endpoint_ClearStatusStage();
 123
 124                                 HIDInterfaceInfo->State.IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
 125                         }
 126
 127                         break;
 128                 case HID_REQ_GetIdle:
 129                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
 130                         {
 131                                 Endpoint_ClearSETUP();
 132                                 while (!(Endpoint_IsINReady()));
 133                                 Endpoint_Write_8(HIDInterfaceInfo->State.IdleCount >> 2);
 134                                 Endpoint_ClearIN();
 135                                 Endpoint_ClearStatusStage();
 136                         }
 137
 138                         break;
 139         }
 140 }
 141
 142 bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 143 {
 144         memset(&HIDInterfaceInfo->State, 0x00, sizeof(HIDInterfaceInfo->State));
 145         HIDInterfaceInfo->State.UsingReportProtocol = true;
 146         HIDInterfaceInfo->State.IdleCount           = 500;
 147
 148         HIDInterfaceInfo->Config.ReportINEndpoint.Type = EP_TYPE_INTERRUPT;
 149
 150         if (!(Endpoint_ConfigureEndpointTable(&HIDInterfaceInfo->Config.ReportINEndpoint, 1)))
 151           return false;
 152
 153         return true;
 154 }
 155
 156 void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 157 {
 158         if (USB_DeviceState != DEVICE_STATE_Configured)
 159           return;
 160
 161         if (HIDInterfaceInfo->State.PrevFrameNum == USB_Device_GetFrameNumber())
 162         {
 163                 #if defined(USB_DEVICE_OPT_LOWSPEED)
 164                 if (!(USB_Options & USB_DEVICE_OPT_LOWSPEED))
 165                   return;
 166                 #else
 167                 return;
 168                 #endif
 169         }
 170
 171         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpoint.Address);
 172
 173         if (Endpoint_IsReadWriteAllowed())
 174         {
 175                 uint8_t  ReportINData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
 176                 uint8_t  ReportID     = 0;
 177                 uint16_t ReportINSize = 0;
 178
 179                 memset(ReportINData, 0, sizeof(ReportINData));
 180
 181                 bool ForceSend         = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, HID_REPORT_ITEM_In,
 182                                                                              ReportINData, &ReportINSize);
 183                 bool StatesChanged     = false;
 184                 bool IdlePeriodElapsed = (HIDInterfaceInfo->State.IdleCount && !(HIDInterfaceInfo->State.IdleMSRemaining));
 185
 186                 if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
 187                 {
 188                         StatesChanged = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
 189                         memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, HIDInterfaceInfo->Config.PrevReportINBufferSize);
 190                 }
 191
 192                 if (ReportINSize && (ForceSend || StatesChanged || IdlePeriodElapsed))
 193                 {
 194                         HIDInterfaceInfo->State.IdleMSRemaining = HIDInterfaceInfo->State.IdleCount;
 195
 196                         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpoint.Address);
 197
 198                         if (ReportID)
 199                           Endpoint_Write_8(ReportID);
 200
 201                         Endpoint_Write_Stream_LE(ReportINData, ReportINSize, NULL);
 202
 203                         Endpoint_ClearIN();
 204                 }
 205
 206                 HIDInterfaceInfo->State.PrevFrameNum = USB_Device_GetFrameNumber();
 207         }
 208 }
 209
 210 #endif
 211