LUFA/Drivers/USB/LowLevel/HostChapter9.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
  33 #if defined(USB_CAN_BE_HOST)
  34
  35 #define  INCLUDE_FROM_HOSTCHAPTER9_C
  36 #include "HostChapter9.h"
  37
  38 uint8_t USB_Host_SendControlRequest(void* BufferPtr)
  39 {
  40         uint8_t* HeaderStream   = (uint8_t*)&USB_ControlRequest;
  41         uint8_t* DataStream     = (uint8_t*)BufferPtr;
  42         bool     BusSuspended   = USB_Host_IsBusSuspended();
  43         uint8_t  ReturnStatus   = HOST_SENDCONTROL_Successful;
  44         uint16_t DataLen        = USB_ControlRequest.wLength;
  45
  46         USB_Host_ResumeBus();
  47
  48         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  49           goto End_Of_Control_Send;
  50
  51         Pipe_SetToken(PIPE_TOKEN_SETUP);
  52         Pipe_ClearErrorFlags();
  53
  54         Pipe_Unfreeze();
  55
  56         for (uint8_t HeaderByte = 0; HeaderByte < sizeof(USB_Request_Header_t); HeaderByte++)
  57           Pipe_Write_Byte(*(HeaderStream++));
  58
  59         Pipe_ClearSETUP();
  60
  61         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_SetupSent)) != HOST_SENDCONTROL_Successful)
  62           goto End_Of_Control_Send;
  63
  64         Pipe_Freeze();
  65
  66         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  67           goto End_Of_Control_Send;
  68
  69         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  70         {
  71                 Pipe_SetToken(PIPE_TOKEN_IN);
  72
  73                 if (DataStream != NULL)
  74                 {
  75                         while (DataLen)
  76                         {
  77                                 Pipe_Unfreeze();
  78
  79                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
  80                                   goto End_Of_Control_Send;
  81
  82                                 if (!(Pipe_BytesInPipe()))
  83                                   DataLen = 0;
  84
  85                                 while (Pipe_BytesInPipe() && DataLen)
  86                                 {
  87                                         *(DataStream++) = Pipe_Read_Byte();
  88                                         DataLen--;
  89                                 }
  90
  91                                 Pipe_Freeze();
  92                                 Pipe_ClearIN();
  93                         }
  94                 }
  95
  96                 Pipe_SetToken(PIPE_TOKEN_OUT);
  97                 Pipe_Unfreeze();
  98
  99                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 100                   goto End_Of_Control_Send;
 101
 102                 Pipe_ClearOUT();
 103
 104                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 105                   goto End_Of_Control_Send;
 106         }
 107         else
 108         {
 109                 if (DataStream != NULL)
 110                 {
 111                         Pipe_SetToken(PIPE_TOKEN_OUT);
 112                         Pipe_Unfreeze();
 113
 114                         while (DataLen)
 115                         {
 116                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 117                                   goto End_Of_Control_Send;
 118
 119                                 while (DataLen && (Pipe_BytesInPipe() < USB_ControlPipeSize))
 120                                 {
 121                                         Pipe_Write_Byte(*(DataStream++));
 122                                         DataLen--;
 123                                 }
 124
 125                                 Pipe_ClearOUT();
 126                         }
 127
 128                         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 129                           goto End_Of_Control_Send;
 130
 131                         Pipe_Freeze();
 132                 }
 133
 134                 Pipe_SetToken(PIPE_TOKEN_IN);
 135                 Pipe_Unfreeze();
 136
 137                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
 138                   goto End_Of_Control_Send;
 139
 140                 Pipe_ClearIN();
 141         }
 142
 143 End_Of_Control_Send:
 144         Pipe_Freeze();
 145
 146         if (BusSuspended)
 147           USB_Host_SuspendBus();
 148
 149         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 150
 151         return ReturnStatus;
 152 }
 153
 154 static uint8_t USB_Host_WaitForIOS(const uint8_t WaitType)
 155 {
 156         #if (USB_HOST_TIMEOUT_MS < 0xFF)
 157         uint8_t  TimeoutCounter = USB_HOST_TIMEOUT_MS;
 158         #else
 159         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 160         #endif
 161
 162         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSETUPSent())  ||
 163                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsINReceived()) ||
 164                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsOUTReady())))
 165         {
 166                 uint8_t ErrorCode;
 167
 168                 if ((ErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
 169                   return ErrorCode;
 170
 171                 if (!(TimeoutCounter--))
 172                   return HOST_SENDCONTROL_SoftwareTimeOut;
 173         }
 174
 175         return HOST_SENDCONTROL_Successful;
 176 }
 177
 178 #endif