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 USB_Host_Request_Header_t USB_HostRequest;
  39
  40 uint8_t USB_Host_SendControlRequest(void* BufferPtr)
  41 {
  42         uint8_t* HeaderStream   = (uint8_t*)&USB_HostRequest;
  43         uint8_t* DataStream     = (uint8_t*)BufferPtr;
  44         bool     BusSuspended   = USB_Host_IsBusSuspended();
  45         uint8_t  ReturnStatus   = HOST_SENDCONTROL_Successful;
  46         uint16_t DataLen        = USB_HostRequest.wLength;
  47
  48         USB_Host_ResumeBus();
  49
  50         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  51           return ReturnStatus;
  52
  53         Pipe_SetToken(PIPE_TOKEN_SETUP);
  54         Pipe_ClearErrorFlags();
  55         Pipe_ClearSetupSent();
  56
  57         Pipe_Unfreeze();
  58
  59         for (uint8_t HeaderByte = 0; HeaderByte < sizeof(USB_Host_Request_Header_t); HeaderByte++)
  60           Pipe_Write_Byte(*(HeaderStream++));
  61
  62         Pipe_ClearSetupOUT();
  63
  64         if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_SetupSent)))
  65           goto End_Of_Control_Send;
  66
  67         Pipe_ClearSetupSent();
  68         Pipe_Freeze();
  69
  70         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  71           goto End_Of_Control_Send;
  72
  73         if ((USB_HostRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  74         {
  75                 Pipe_SetToken(PIPE_TOKEN_IN);
  76
  77                 if (DataStream != NULL)
  78                 {
  79                         while (DataLen)
  80                         {
  81                                 Pipe_Unfreeze();
  82
  83                                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_InReceived)))
  84                                   goto End_Of_Control_Send;
  85
  86                                 if (!(Pipe_BytesInPipe()))
  87                                   DataLen = 0;
  88
  89                                 while (Pipe_BytesInPipe() && DataLen)
  90                                 {
  91                                         *(DataStream++) = Pipe_Read_Byte();
  92                                         DataLen--;
  93                                 }
  94
  95                                 Pipe_Freeze();
  96                                 Pipe_ClearSetupIN();
  97                         }
  98                 }
  99
 100                 Pipe_SetToken(PIPE_TOKEN_OUT);
 101                 Pipe_Unfreeze();
 102
 103                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 104                   goto End_Of_Control_Send;
 105
 106                 Pipe_ClearSetupOUT();
 107
 108                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 109                   goto End_Of_Control_Send;
 110         }
 111         else
 112         {
 113                 if (DataStream != NULL)
 114                 {
 115                         Pipe_SetToken(PIPE_TOKEN_OUT);
 116                         Pipe_Unfreeze();
 117
 118                         while (DataLen)
 119                         {
 120                                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 121                                   goto End_Of_Control_Send;
 122
 123                                 while (DataLen && (Pipe_BytesInPipe() < USB_ControlPipeSize))
 124                                 {
 125                                         Pipe_Write_Byte(*(DataStream++));
 126                                         DataLen--;
 127                                 }
 128
 129                                 Pipe_ClearSetupOUT();
 130                         }
 131
 132                         if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 133                           goto End_Of_Control_Send;
 134
 135                         Pipe_Freeze();
 136                 }
 137
 138                 Pipe_SetToken(PIPE_TOKEN_IN);
 139                 Pipe_Unfreeze();
 140
 141                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_InReceived)))
 142                   goto End_Of_Control_Send;
 143
 144                 Pipe_ClearSetupIN();
 145         }
 146
 147 End_Of_Control_Send:
 148         Pipe_Freeze();
 149
 150         if (BusSuspended)
 151           USB_Host_SuspendBus();
 152
 153         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 154
 155         return ReturnStatus;
 156 }
 157
 158 static uint8_t USB_Host_Wait_For_Setup_IOS(const uint8_t WaitType)
 159 {
 160         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 161
 162         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSetupSent())       ||
 163                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsSetupINReceived()) ||
 164                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsSetupOUTReady())))
 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