LUFA/Drivers/USB/Core/UC3/Pipe_UC3.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 #include "../Pipe.h"
  37
  38 uint8_t USB_Host_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  39
  40 volatile uint32_t USB_SelectedPipe = PIPE_CONTROLPIPE;
  41 volatile uint8_t* USB_PipeFIFOPos[PIPE_TOTAL_PIPES];
  42
  43 bool Pipe_ConfigurePipe(const uint8_t Number,
  44                         const uint8_t Type,
  45                         const uint8_t Token,
  46                         const uint8_t EndpointNumber,
  47                         const uint16_t Size,
  48                         const uint8_t Banks)
  49 {
  50         Pipe_SelectPipe(Number);
  51         Pipe_EnablePipe();
  52
  53         (&AVR32_USBB.upcfg0)[Number] = 0;
  54         (&AVR32_USBB.upcfg0)[Number] = (AVR32_USBB_ALLOC_MASK |
  55                                         ((uint32_t)Type  << AVR32_USBB_PTYPE_OFFSET)  |
  56                                         ((uint32_t)Token << AVR32_USBB_PTOKEN_OFFSET) |
  57                                         ((uint32_t)Banks << AVR32_USBB_PBK_OFFSET)    |
  58                                         ((EndpointNumber & PIPE_EPNUM_MASK) << AVR32_USBB_PEPNUM_OFFSET));
  59         USB_PipeFIFOPos[Number]      = &AVR32_USBB_SLAVE[Number * 0x10000];
  60
  61         Pipe_SetInfiniteINRequests();
  62
  63         return Pipe_IsConfigured();
  64 }
  65
  66 void Pipe_ClearPipes(void)
  67 {
  68         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  69         {
  70                 Pipe_SelectPipe(PNum);
  71                 (&AVR32_USBB.upcfg0)[PNum]    = 0;
  72                 (&AVR32_USBB.upcon0clr)[PNum] = -1;
  73                 USB_PipeFIFOPos[PNum]         = &AVR32_USBB_SLAVE[PNum * 0x10000];
  74                 Pipe_DisablePipe();
  75         }
  76 }
  77
  78 bool Pipe_IsEndpointBound(const uint8_t EndpointAddress)
  79 {
  80         uint8_t PrevPipeNumber = Pipe_GetCurrentPipe();
  81
  82         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  83         {
  84                 Pipe_SelectPipe(PNum);
  85
  86                 if (!(Pipe_IsConfigured()))
  87                   continue;
  88
  89                 if (Pipe_GetBoundEndpointAddress() == EndpointAddress)
  90                   return true;
  91         }
  92
  93         Pipe_SelectPipe(PrevPipeNumber);
  94         return false;
  95 }
  96
  97 uint8_t Pipe_WaitUntilReady(void)
  98 {
  99         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 100         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 101         #else
 102         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 103         #endif
 104
 105         uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
 106
 107         for (;;)
 108         {
 109                 if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 110                 {
 111                         if (Pipe_IsINReceived())
 112                           return PIPE_READYWAIT_NoError;
 113                 }
 114                 else
 115                 {
 116                         if (Pipe_IsOUTReady())
 117                           return PIPE_READYWAIT_NoError;
 118                 }
 119
 120                 if (Pipe_IsStalled())
 121                   return PIPE_READYWAIT_PipeStalled;
 122                 else if (USB_HostState == HOST_STATE_Unattached)
 123                   return PIPE_READYWAIT_DeviceDisconnected;
 124
 125                 uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
 126
 127                 if (CurrentFrameNumber != PreviousFrameNumber)
 128                 {
 129                         PreviousFrameNumber = CurrentFrameNumber;
 130
 131                         if (!(TimeoutMSRem--))
 132                           return PIPE_READYWAIT_Timeout;
 133                 }
 134         }
 135 }
 136
 137 #endif
 138