LUFA/Drivers/USB/Core/HostStandardReq.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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 "USBMode.h"
  33
  34 #if defined(USB_CAN_BE_HOST)
  35
  36 #define  __INCLUDE_FROM_HOSTSTDREQ_C
  37 #include "HostStandardReq.h"
  38
  39 uint8_t USB_Host_SendControlRequest(void* const 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_ClearError();
  54
  55         Pipe_Unfreeze();
  56
  57         Pipe_Write_Byte(USB_ControlRequest.bmRequestType);
  58         Pipe_Write_Byte(USB_ControlRequest.bRequest);
  59         Pipe_Write_Word_LE(USB_ControlRequest.wValue);
  60         Pipe_Write_Word_LE(USB_ControlRequest.wIndex);
  61         Pipe_Write_Word_LE(USB_ControlRequest.wLength);
  62
  63         Pipe_ClearSETUP();
  64
  65         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_SetupSent)) != HOST_SENDCONTROL_Successful)
  66           goto End_Of_Control_Send;
  67
  68         Pipe_Freeze();
  69
  70         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  71           goto End_Of_Control_Send;
  72
  73         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  74         {
  75                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
  76
  77                 if (DataStream != NULL)
  78                 {
  79                         while (DataLen)
  80                         {
  81                                 Pipe_Unfreeze();
  82
  83                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
  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_ClearIN();
  97                         }
  98                 }
  99
 100                 Pipe_SetPipeToken(PIPE_TOKEN_OUT);
 101                 Pipe_Unfreeze();
 102
 103                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 104                   goto End_Of_Control_Send;
 105
 106                 Pipe_ClearOUT();
 107
 108                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 109                   goto End_Of_Control_Send;
 110         }
 111         else
 112         {
 113                 if (DataStream != NULL)
 114                 {
 115                         Pipe_SetPipeToken(PIPE_TOKEN_OUT);
 116                         Pipe_Unfreeze();
 117
 118                         while (DataLen)
 119                         {
 120                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 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_ClearOUT();
 130                         }
 131
 132                         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 133                           goto End_Of_Control_Send;
 134
 135                         Pipe_Freeze();
 136                 }
 137
 138                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
 139                 Pipe_Unfreeze();
 140
 141                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
 142                   goto End_Of_Control_Send;
 143
 144                 Pipe_ClearIN();
 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_WaitForIOS(const uint8_t WaitType)
 159 {
 160         #if (USB_HOST_TIMEOUT_MS < 0xFF)
 161         uint8_t  TimeoutCounter = USB_HOST_TIMEOUT_MS;
 162         #else
 163         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 164         #endif
 165
 166         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSETUPSent())  ||
 167                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsINReceived()) ||
 168                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsOUTReady())))
 169         {
 170                 uint8_t ErrorCode;
 171
 172                 if ((ErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
 173                   return ErrorCode;
 174
 175                 if (!(TimeoutCounter--))
 176                   return HOST_SENDCONTROL_SoftwareTimeOut;
 177         }
 178
 179         return HOST_SENDCONTROL_Successful;
 180 }
 181
 182 #endif
 183