LUFA/Drivers/USB/LowLevel/HostChapter9.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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 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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "../HighLevel/USBMode.h"
  33
  34 #if defined(USB_CAN_BE_HOST)
  35
  36 #define  __INCLUDE_FROM_HOSTCHAPTER9_C
  37 #include "HostChapter9.h"
  38
  39 uint8_t USB_Host_SendControlRequest(void* BufferPtr)
  40 {
  41         uint8_t* HeaderStream   = (uint8_t*)&USB_ControlRequest;
  42         uint8_t* DataStream     = (uint8_t*)BufferPtr;
  43         bool     BusSuspended   = USB_Host_IsBusSuspended();
  44         uint8_t  ReturnStatus   = HOST_SENDCONTROL_Successful;
  45         uint16_t DataLen        = USB_ControlRequest.wLength;
  46
  47         USB_Host_ResumeBus();
  48
  49         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  50           goto End_Of_Control_Send;
  51
  52         Pipe_SetPipeToken(PIPE_TOKEN_SETUP);
  53         Pipe_ClearErrorFlags();
  54
  55         Pipe_Unfreeze();
  56
  57         for (uint8_t HeaderByte = 0; HeaderByte < sizeof(USB_Request_Header_t); HeaderByte++)
  58           Pipe_Write_Byte(*(HeaderStream++));
  59
  60         Pipe_ClearSETUP();
  61
  62         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_SetupSent)) != HOST_SENDCONTROL_Successful)
  63           goto End_Of_Control_Send;
  64
  65         Pipe_Freeze();
  66
  67         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  68           goto End_Of_Control_Send;
  69
  70         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  71         {
  72                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
  73
  74                 if (DataStream != NULL)
  75                 {
  76                         while (DataLen)
  77                         {
  78                                 Pipe_Unfreeze();
  79
  80                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
  81                                   goto End_Of_Control_Send;
  82
  83                                 if (!(Pipe_BytesInPipe()))
  84                                   DataLen = 0;
  85
  86                                 while (Pipe_BytesInPipe() && DataLen)
  87                                 {
  88                                         *(DataStream++) = Pipe_Read_Byte();
  89                                         DataLen--;
  90                                 }
  91
  92                                 Pipe_Freeze();
  93                                 Pipe_ClearIN();
  94                         }
  95                 }
  96
  97                 Pipe_SetPipeToken(PIPE_TOKEN_OUT);
  98                 Pipe_Unfreeze();
  99
 100                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 101                   goto End_Of_Control_Send;
 102
 103                 Pipe_ClearOUT();
 104
 105                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 106                   goto End_Of_Control_Send;
 107         }
 108         else
 109         {
 110                 if (DataStream != NULL)
 111                 {
 112                         Pipe_SetPipeToken(PIPE_TOKEN_OUT);
 113                         Pipe_Unfreeze();
 114
 115                         while (DataLen)
 116                         {
 117                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 118                                   goto End_Of_Control_Send;
 119
 120                                 while (DataLen && (Pipe_BytesInPipe() < USB_ControlPipeSize))
 121                                 {
 122                                         Pipe_Write_Byte(*(DataStream++));
 123                                         DataLen--;
 124                                 }
 125
 126                                 Pipe_ClearOUT();
 127                         }
 128
 129                         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 130                           goto End_Of_Control_Send;
 131
 132                         Pipe_Freeze();
 133                 }
 134
 135                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
 136                 Pipe_Unfreeze();
 137
 138                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
 139                   goto End_Of_Control_Send;
 140
 141                 Pipe_ClearIN();
 142         }
 143
 144 End_Of_Control_Send:
 145         Pipe_Freeze();
 146
 147         if (BusSuspended)
 148           USB_Host_SuspendBus();
 149
 150         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 151
 152         return ReturnStatus;
 153 }
 154
 155 static uint8_t USB_Host_WaitForIOS(const uint8_t WaitType)
 156 {
 157         #if (USB_HOST_TIMEOUT_MS < 0xFF)
 158         uint8_t  TimeoutCounter = USB_HOST_TIMEOUT_MS;
 159         #else
 160         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 161         #endif
 162
 163         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSETUPSent())  ||
 164                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsINReceived()) ||
 165                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsOUTReady())))
 166         {
 167                 uint8_t ErrorCode;
 168
 169                 if ((ErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
 170                   return ErrorCode;
 171
 172                 if (!(TimeoutCounter--))
 173                   return HOST_SENDCONTROL_SoftwareTimeOut;
 174         }
 175
 176         return HOST_SENDCONTROL_Successful;
 177 }
 178
 179 #endif