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_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  39
  40 volatile uint8_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] = 0xFFFFFFFF;
  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                 uint8_t PipeToken        = Pipe_GetPipeToken();
  90                 bool    PipeTokenCorrect = true;
  91
  92                 if (PipeToken != PIPE_TOKEN_SETUP)
  93                   PipeTokenCorrect = (PipeToken == ((EndpointAddress & PIPE_EPDIR_MASK) ? PIPE_TOKEN_IN : PIPE_TOKEN_OUT));
  94
  95                 if (PipeTokenCorrect && (Pipe_BoundEndpointNumber() == (EndpointAddress & PIPE_EPNUM_MASK)))
  96                   return true;
  97         }
  98
  99         Pipe_SelectPipe(PrevPipeNumber);
 100         return false;
 101 }
 102
 103 uint8_t Pipe_WaitUntilReady(void)
 104 {
 105         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 106         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 107         #else
 108         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 109         #endif
 110
 111         uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
 112
 113         for (;;)
 114         {
 115                 if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 116                 {
 117                         if (Pipe_IsINReceived())
 118                           return PIPE_READYWAIT_NoError;
 119                 }
 120                 else
 121                 {
 122                         if (Pipe_IsOUTReady())
 123                           return PIPE_READYWAIT_NoError;
 124                 }
 125
 126                 if (Pipe_IsStalled())
 127                   return PIPE_READYWAIT_PipeStalled;
 128                 else if (USB_HostState == HOST_STATE_Unattached)
 129                   return PIPE_READYWAIT_DeviceDisconnected;
 130
 131                 uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
 132
 133                 if (CurrentFrameNumber != PreviousFrameNumber)
 134                 {
 135                         PreviousFrameNumber = CurrentFrameNumber;
 136
 137                         if (!(TimeoutMSRem--))
 138                           return PIPE_READYWAIT_Timeout;
 139                 }
 140         }
 141 }
 142
 143 #endif
 144