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

   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 #include "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_DEVICE)
  33
  34 #include "HID.h"
  35
  36 void HID_Device_ProcessControlRequest(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
  37 {
  38         if (!(Endpoint_IsSETUPReceived()))
  39           return;
  40
  41         if (USB_ControlRequest.wIndex != HIDInterfaceInfo->Config.InterfaceNumber)
  42           return;
  43
  44         switch (USB_ControlRequest.bRequest)
  45         {
  46                 case REQ_GetReport:
  47                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  48                         {
  49                                 Endpoint_ClearSETUP();
  50
  51                                 uint16_t ReportINSize = 0;
  52                                 uint8_t  ReportID     = (USB_ControlRequest.wValue & 0xFF);
  53
  54                                 memset(HIDInterfaceInfo->Config.PrevReportINBuffer, 0, HIDInterfaceInfo->Config.PrevReportINBufferSize);
  55
  56                                 CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID,
  57                                                                     HIDInterfaceInfo->Config.PrevReportINBuffer, &ReportINSize);
  58
  59                                 Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
  60                                 Endpoint_Write_Control_Stream_LE(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize);
  61                                 Endpoint_ClearOUT();
  62                         }
  63
  64                         break;
  65                 case REQ_SetReport:
  66                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  67                         {
  68                                 Endpoint_ClearSETUP();
  69
  70                                 uint16_t ReportOUTSize = USB_ControlRequest.wLength;
  71                                 uint8_t  ReportOUTData[ReportOUTSize];
  72                                 uint8_t  ReportID = (USB_ControlRequest.wValue & 0xFF);
  73
  74                                 Endpoint_Read_Control_Stream_LE(ReportOUTData, ReportOUTSize);
  75                                 Endpoint_ClearIN();
  76
  77                                 CALLBACK_HID_Device_ProcessHIDReport(HIDInterfaceInfo, ReportID, ReportOUTData, ReportOUTSize);
  78                         }
  79
  80                         break;
  81                 case REQ_GetProtocol:
  82                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
  83                         {
  84                                 Endpoint_ClearSETUP();
  85
  86                                 Endpoint_Write_Byte(HIDInterfaceInfo->State.UsingReportProtocol);
  87                                 Endpoint_ClearIN();
  88
  89                                 Endpoint_ClearStatusStage();
  90                         }
  91
  92                         break;
  93                 case REQ_SetProtocol:
  94                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
  95                         {
  96                                 Endpoint_ClearSETUP();
  97
  98                                 HIDInterfaceInfo->State.UsingReportProtocol = (USB_ControlRequest.wValue != 0x0000);
  99
 100                                 Endpoint_ClearStatusStage();
 101                         }
 102
 103                         break;
 104                 case REQ_SetIdle:
 105                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
 106                         {
 107                                 Endpoint_ClearSETUP();
 108
 109                                 HIDInterfaceInfo->State.IdleCount = ((USB_ControlRequest.wValue & 0xFF00) >> 6);
 110
 111                                 Endpoint_ClearStatusStage();
 112                         }
 113
 114                         break;
 115                 case REQ_GetIdle:
 116                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
 117                         {
 118                                 Endpoint_ClearSETUP();
 119
 120                                 Endpoint_Write_Byte(HIDInterfaceInfo->State.IdleCount >> 2);
 121                                 Endpoint_ClearIN();
 122
 123                                 Endpoint_ClearStatusStage();
 124                         }
 125
 126                         break;
 127         }
 128 }
 129
 130 bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 131 {
 132         memset(&HIDInterfaceInfo->State, 0x00, sizeof(HIDInterfaceInfo->State));
 133         HIDInterfaceInfo->State.UsingReportProtocol = true;
 134         HIDInterfaceInfo->State.IdleCount = 500;
 135
 136         if (!(Endpoint_ConfigureEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber, EP_TYPE_INTERRUPT,
 137                                                                          ENDPOINT_DIR_IN, HIDInterfaceInfo->Config.ReportINEndpointSize, ENDPOINT_BANK_SINGLE)))
 138         {
 139                 return false;
 140         }
 141
 142         return true;
 143 }
 144
 145 void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 146 {
 147         if (USB_DeviceState != DEVICE_STATE_Configured)
 148           return;
 149
 150         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber);
 151
 152         if (Endpoint_IsReadWriteAllowed())
 153         {
 154                 uint8_t  ReportINData[HIDInterfaceInfo->Config.PrevReportINBufferSize];
 155                 uint8_t  ReportID     = 0;
 156                 uint16_t ReportINSize = 0;
 157
 158                 memset(ReportINData, 0, sizeof(ReportINData));
 159
 160                 bool ForceSend = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, ReportINData, &ReportINSize);
 161
 162                 bool StatesChanged     = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
 163                 bool IdlePeriodElapsed = (HIDInterfaceInfo->State.IdleCount && !(HIDInterfaceInfo->State.IdleMSRemaining));
 164
 165                 memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, ReportINSize);
 166
 167                 if (ReportINSize && (ForceSend || StatesChanged || IdlePeriodElapsed))
 168                 {
 169                         HIDInterfaceInfo->State.IdleMSRemaining = HIDInterfaceInfo->State.IdleCount;
 170
 171                         Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpointNumber);
 172
 173                         if (ReportID)
 174                           Endpoint_Write_Byte(ReportID);
 175
 176                         Endpoint_Write_Stream_LE(ReportINData, ReportINSize, NO_STREAM_CALLBACK);
 177
 178                         Endpoint_ClearIN();
 179                 }
 180         }
 181 }
 182
 183 void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo)
 184 {
 185         if (HIDInterfaceInfo->State.IdleMSRemaining)
 186           HIDInterfaceInfo->State.IdleMSRemaining--;
 187 }
 188
 189 #endif