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* DataStream   = (uint8_t*)BufferPtr;
  42         bool     BusSuspended = USB_Host_IsBusSuspended();
  43         uint8_t  ReturnStatus = HOST_SENDCONTROL_Successful;
  44         uint16_t DataLen      = USB_ControlRequest.wLength;
  45
  46         USB_Host_ResumeBus();
  47
  48         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  49           goto End_Of_Control_Send;
  50
  51         Pipe_SetPipeToken(PIPE_TOKEN_SETUP);
  52         Pipe_ClearError();
  53
  54         Pipe_Unfreeze();
  55
  56         Pipe_Write_Byte(USB_ControlRequest.bmRequestType);
  57         Pipe_Write_Byte(USB_ControlRequest.bRequest);
  58         Pipe_Write_Word_LE(USB_ControlRequest.wValue);
  59         Pipe_Write_Word_LE(USB_ControlRequest.wIndex);
  60         Pipe_Write_Word_LE(USB_ControlRequest.wLength);
  61
  62         Pipe_ClearSETUP();
  63
  64         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_SetupSent)) != HOST_SENDCONTROL_Successful)
  65           goto End_Of_Control_Send;
  66
  67         Pipe_Freeze();
  68
  69         if ((ReturnStatus = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  70           goto End_Of_Control_Send;
  71
  72         if ((USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_DIRECTION) == REQDIR_DEVICETOHOST)
  73         {
  74                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
  75
  76                 if (DataStream != NULL)
  77                 {
  78                         while (DataLen)
  79                         {
  80                                 Pipe_Unfreeze();
  81
  82                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
  83                                   goto End_Of_Control_Send;
  84
  85                                 if (!(Pipe_BytesInPipe()))
  86                                   DataLen = 0;
  87
  88                                 while (Pipe_BytesInPipe() && DataLen)
  89                                 {
  90                                         *(DataStream++) = Pipe_Read_Byte();
  91                                         DataLen--;
  92                                 }
  93
  94                                 Pipe_Freeze();
  95                                 Pipe_ClearIN();
  96                         }
  97                 }
  98
  99                 Pipe_SetPipeToken(PIPE_TOKEN_OUT);
 100                 Pipe_Unfreeze();
 101
 102                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 103                   goto End_Of_Control_Send;
 104
 105                 Pipe_ClearOUT();
 106
 107                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 108                   goto End_Of_Control_Send;
 109         }
 110         else
 111         {
 112                 if (DataStream != NULL)
 113                 {
 114                         Pipe_SetPipeToken(PIPE_TOKEN_OUT);
 115                         Pipe_Unfreeze();
 116
 117                         while (DataLen)
 118                         {
 119                                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 120                                   goto End_Of_Control_Send;
 121
 122                                 while (DataLen && (Pipe_BytesInPipe() < USB_ControlPipeSize))
 123                                 {
 124                                         Pipe_Write_Byte(*(DataStream++));
 125                                         DataLen--;
 126                                 }
 127
 128                                 Pipe_ClearOUT();
 129                         }
 130
 131                         if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_OutReady)) != HOST_SENDCONTROL_Successful)
 132                           goto End_Of_Control_Send;
 133
 134                         Pipe_Freeze();
 135                 }
 136
 137                 Pipe_SetPipeToken(PIPE_TOKEN_IN);
 138                 Pipe_Unfreeze();
 139
 140                 if ((ReturnStatus = USB_Host_WaitForIOS(USB_HOST_WAITFOR_InReceived)) != HOST_SENDCONTROL_Successful)
 141                   goto End_Of_Control_Send;
 142
 143                 Pipe_ClearIN();
 144         }
 145
 146 End_Of_Control_Send:
 147         Pipe_Freeze();
 148
 149         if (BusSuspended)
 150           USB_Host_SuspendBus();
 151
 152         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 153
 154         return ReturnStatus;
 155 }
 156
 157 static uint8_t USB_Host_WaitForIOS(const uint8_t WaitType)
 158 {
 159         #if (USB_HOST_TIMEOUT_MS < 0xFF)
 160         uint8_t  TimeoutCounter = USB_HOST_TIMEOUT_MS;
 161         #else
 162         uint16_t TimeoutCounter = USB_HOST_TIMEOUT_MS;
 163         #endif
 164
 165         while (!(((WaitType == USB_HOST_WAITFOR_SetupSent)  && Pipe_IsSETUPSent())  ||
 166                  ((WaitType == USB_HOST_WAITFOR_InReceived) && Pipe_IsINReceived()) ||
 167                  ((WaitType == USB_HOST_WAITFOR_OutReady)   && Pipe_IsOUTReady())))
 168         {
 169                 uint8_t ErrorCode;
 170
 171                 if ((ErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
 172                   return ErrorCode;
 173
 174                 if (!(TimeoutCounter--))
 175                   return HOST_SENDCONTROL_SoftwareTimeOut;
 176         }
 177
 178         return HOST_SENDCONTROL_Successful;
 179 }
 180
 181 #endif
 182