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
  56         Pipe_Unfreeze();
  57
  58         for (uint8_t HeaderByte = 0; HeaderByte < sizeof(USB_Host_Request_Header_t); HeaderByte++)
  59           Pipe_Write_Byte(*(HeaderStream++));
  60
  61         Pipe_ClearSETUP();
  62
  63         if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_SetupSent)))
  64           goto End_Of_Control_Send;
  65
  66         Pipe_Freeze();
  67
  68         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  69           goto End_Of_Control_Send;
  70
  71         if ((USB_HostRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  72         {
  73                 Pipe_SetToken(PIPE_TOKEN_IN);
  74
  75                 if (DataStream != NULL)
  76                 {
  77                         while (DataLen)
  78                         {
  79                                 Pipe_Unfreeze();
  80
  81                                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_InReceived)))
  82                                   goto End_Of_Control_Send;
  83
  84                                 if (!(Pipe_BytesInPipe()))
  85                                   DataLen = 0;
  86
  87                                 while (Pipe_BytesInPipe() && DataLen)
  88                                 {
  89                                         *(DataStream++) = Pipe_Read_Byte();
  90                                         DataLen--;
  91                                 }
  92
  93                                 Pipe_Freeze();
  94                                 Pipe_ClearIN();
  95                         }
  96                 }
  97
  98                 Pipe_SetToken(PIPE_TOKEN_OUT);
  99                 Pipe_Unfreeze();
 100
 101                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 102                   goto End_Of_Control_Send;
 103
 104                 Pipe_ClearOUT();
 105
 106                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 107                   goto End_Of_Control_Send;
 108         }
 109         else
 110         {
 111                 if (DataStream != NULL)
 112                 {
 113                         Pipe_SetToken(PIPE_TOKEN_OUT);
 114                         Pipe_Unfreeze();
 115
 116                         while (DataLen)
 117                         {
 118                                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 119                                   goto End_Of_Control_Send;
 120
 121                                 while (DataLen && (Pipe_BytesInPipe() < USB_ControlPipeSize))
 122                                 {
 123                                         Pipe_Write_Byte(*(DataStream++));
 124                                         DataLen--;
 125                                 }
 126
 127                                 Pipe_ClearOUT();
 128                         }
 129
 130                         if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_OutReady)))
 131                           goto End_Of_Control_Send;
 132
 133                         Pipe_Freeze();
 134                 }
 135
 136                 Pipe_SetToken(PIPE_TOKEN_IN);
 137                 Pipe_Unfreeze();
 138
 139                 if ((ReturnStatus = USB_Host_Wait_For_Setup_IOS(USB_HOST_WAITFOR_InReceived)))
 140                   goto End_Of_Control_Send;
 141
 142                 Pipe_ClearIN();
 143         }
 144
 145 End_Of_Control_Send:
 146         Pipe_Freeze();
 147
 148         if (BusSuspended)
 149           USB_Host_SuspendBus();
 150
 151         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 152
 153         return ReturnStatus;
 154 }
 155
 156 static uint8_t USB_Host_Wait_For_Setup_IOS(const uint8_t WaitType)
 157 {
 158         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 159
 160         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSETUPSent())       ||
 161                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsINReceived()) ||
 162                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsOUTReady())))
 163         {
 164                 uint8_t ErrorCode;
 165
 166                 if ((ErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
 167                   return ErrorCode;
 168
 169                 if (!(TimeoutCounter--))
 170                   return HOST_SENDCONTROL_SoftwareTimeOut;
 171         }
 172
 173         return HOST_SENDCONTROL_Successful;
 174 }
 175
 176 #endif