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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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                                 Endpoint_Write_Control_Stream_LE(ReportData, ReportSize);
  72                                 Endpoint_ClearOUT();
  73                         }
  74
  75                         break;
  76                 case HID_REQ_SetReport:
  77                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  78                         {
  79                                 uint16_t ReportSize = USB_ControlRequest.wLength;
  80                                 uint8_t  ReportID   = (USB_ControlRequest.wValue & 0xFF);
  81                                 uint8_t  ReportType = (USB_ControlRequest.wValue >> 8) - 1;
  82                                 uint8_t  ReportData[ReportSize];
  83
  84                                 Endpoint_ClearSETUP();
  85                                 Endpoint_Read_Control_Stream_LE(ReportData, ReportSize);
  86                                 Endpoint_ClearIN();
  87
  88                                 CALLBACK_HID_Device_ProcessHIDReport(HIDInterfaceInfo, ReportID, ReportType,
  89                                                                      &ReportData[ReportID ? 1 : 0], ReportSize - (ReportID ? 1 : 0));
  90                         }
  91
  92                         break;
  93                 case HID_REQ_GetProtocol:
  94                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  95                         {
  96                                 Endpoint_ClearSETUP();
  97                                 while (!(Endpoint_IsINReady()));
  98                                 Endpoint_Write_8(HIDInterfaceInfo->State.UsingReportProtocol);
  99                                 Endpoint_ClearIN();
 100                                 Endpoint_ClearStatusStage();
 101                         }
 102
 103                         break;
 104                 case HID_REQ_SetProtocol:
 105                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 106                         {
 107                                 Endpoint_ClearSETUP();
 108                                 Endpoint_ClearStatusStage();
 109
 110                                 HIDInterfaceInfo->State.UsingReportProtocol = ((USB_ControlRequest.wValue & 0xFF) != 0x00);
 111                         }
 112
 113                         break;
 114                 case HID_REQ_SetIdle:
 115                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 116                         {
 117                                 Endpoint_ClearSETUP();
 118                                 Endpoint_ClearStatusStage();
 119
 120                                 HIDInterfaceInfo->State.IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
 121                         }
 122
 123                         break;
 124                 case HID_REQ_GetIdle:
 125                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
 126                         {
 127                                 Endpoint_ClearSETUP();
 128                                 while (!(Endpoint_IsINReady()));
 129                                 Endpoint_Write_8(HIDInterfaceInfo->State.IdleCount >> 2);
 130                                 Endpoint_ClearIN();
 131                                 Endpoint_ClearStatusStage();
 132                         }
 133
 134                         break;
 135         }
 136 }
 137
 138 bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 139 {
 140         memset(&HIDInterfaceInfo->State, 0x00, sizeof(HIDInterfaceInfo->State));
 141         HIDInterfaceInfo->State.UsingReportProtocol = true;
 142         HIDInterfaceInfo->State.IdleCount           = 500;
 143
 144         HIDInterfaceInfo->Config.ReportINEndpoint.Type = EP_TYPE_INTERRUPT;
 145
 146         if (!(Endpoint_ConfigureEndpointTable(&HIDInterfaceInfo->Config.ReportINEndpoint, 1)))
 147           return false;
 148
 149         return true;
 150 }
 151
 152 void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 153 {
 154         if (USB_DeviceState != DEVICE_STATE_Configured)
 155           return;
 156
 157         if (HIDInterfaceInfo->State.PrevFrameNum == USB_Device_GetFrameNumber())
 158         {
 159                 #if defined(USB_DEVICE_OPT_LOWSPEED)
 160                 if (!(USB_Options & USB_DEVICE_OPT_LOWSPEED))
 161                   return;
 162                 #else
 163                 return;
 164                 #endif
 165         }
 166
 167         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpoint.Address);
 168
 169         if (Endpoint_IsReadWriteAllowed())
 170         {
 171                 uint8_t  ReportINData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
 172                 uint8_t  ReportID     = 0;
 173                 uint16_t ReportINSize = 0;
 174
 175                 memset(ReportINData, 0, sizeof(ReportINData));
 176
 177                 bool ForceSend         = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, HID_REPORT_ITEM_In,
 178                                                                              ReportINData, &ReportINSize);
 179                 bool StatesChanged     = false;
 180                 bool IdlePeriodElapsed = (HIDInterfaceInfo->State.IdleCount && !(HIDInterfaceInfo->State.IdleMSRemaining));
 181
 182                 if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
 183                 {
 184                         StatesChanged = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
 185                         memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, HIDInterfaceInfo->Config.PrevReportINBufferSize);
 186                 }
 187
 188                 if (ReportINSize && (ForceSend || StatesChanged || IdlePeriodElapsed))
 189                 {
 190                         HIDInterfaceInfo->State.IdleMSRemaining = HIDInterfaceInfo->State.IdleCount;
 191
 192                         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpoint.Address);
 193
 194                         if (ReportID)
 195                           Endpoint_Write_8(ReportID);
 196
 197                         Endpoint_Write_Stream_LE(ReportINData, ReportINSize, NULL);
 198
 199                         Endpoint_ClearIN();
 200                 }
 201
 202                 HIDInterfaceInfo->State.PrevFrameNum = USB_Device_GetFrameNumber();
 203         }
 204 }
 205
 206 #endif
 207