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