LUFA/Drivers/USB/LowLevel/Pipe.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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 "../HighLevel/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 bool Pipe_ConfigurePipe(const uint8_t Number,
  41                         const uint8_t Type,
  42                         const uint8_t Token,
  43                         const uint8_t EndpointNumber,
  44                         const uint16_t Size,
  45                         const uint8_t Banks)
  46 {
  47         uint8_t UPCFG0XTemp[PIPE_TOTAL_PIPES];
  48         uint8_t UPCFG1XTemp[PIPE_TOTAL_PIPES];
  49
  50         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  51         {
  52                 Pipe_SelectPipe(PNum);
  53                 UPCFG0XTemp[PNum] = UPCFG0X;
  54                 UPCFG1XTemp[PNum] = UPCFG1X;
  55         }
  56
  57         UPCFG0XTemp[Number] = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
  58         UPCFG1XTemp[Number] = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
  59
  60         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  61         {
  62                 Pipe_SelectPipe(PNum);
  63                 UPIENX  = 0;
  64                 UPINTX  = 0;
  65                 UPCFG1X = 0;
  66                 Pipe_DisablePipe();
  67         }
  68
  69         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  70         {
  71                 if (!(UPCFG1XTemp[PNum] & (1 << ALLOC)))
  72                   continue;
  73
  74                 Pipe_SelectPipe(PNum);
  75                 Pipe_EnablePipe();
  76
  77                 UPCFG0X = UPCFG0XTemp[PNum];
  78                 UPCFG1X = UPCFG1XTemp[PNum];
  79
  80                 if (!(Pipe_IsConfigured()))
  81                   return false;
  82         }
  83
  84         Pipe_SelectPipe(Number);
  85         Pipe_SetInfiniteINRequests();
  86
  87         return true;
  88 }
  89
  90 void Pipe_ClearPipes(void)
  91 {
  92         UPINT = 0;
  93
  94         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
  95         {
  96                 Pipe_SelectPipe(PNum);
  97                 UPIENX  = 0;
  98                 UPINTX  = 0;
  99                 UPCFG1X = 0;
 100                 Pipe_DisablePipe();
 101         }
 102 }
 103
 104 bool Pipe_IsEndpointBound(const uint8_t EndpointAddress)
 105 {
 106         uint8_t PrevPipeNumber = Pipe_GetCurrentPipe();
 107
 108         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
 109         {
 110                 Pipe_SelectPipe(PNum);
 111
 112                 if (!(Pipe_IsConfigured()))
 113                   continue;
 114
 115                 uint8_t PipeToken        = Pipe_GetPipeToken();
 116                 bool    PipeTokenCorrect = true;
 117
 118                 if (PipeToken != PIPE_TOKEN_SETUP)
 119                   PipeTokenCorrect = (PipeToken == ((EndpointAddress & PIPE_EPDIR_MASK) ? PIPE_TOKEN_IN : PIPE_TOKEN_OUT));
 120
 121                 if (PipeTokenCorrect && (Pipe_BoundEndpointNumber() == (EndpointAddress & PIPE_EPNUM_MASK)))
 122                   return true;
 123         }
 124
 125         Pipe_SelectPipe(PrevPipeNumber);
 126         return false;
 127 }
 128
 129 uint8_t Pipe_WaitUntilReady(void)
 130 {
 131         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 132         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 133         #else
 134         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 135         #endif
 136
 137         uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
 138
 139         for (;;)
 140         {
 141                 if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 142                 {
 143                         if (Pipe_IsINReceived())
 144                           return PIPE_READYWAIT_NoError;
 145                 }
 146                 else
 147                 {
 148                         if (Pipe_IsOUTReady())
 149                           return PIPE_READYWAIT_NoError;
 150                 }
 151
 152                 if (Pipe_IsStalled())
 153                   return PIPE_READYWAIT_PipeStalled;
 154                 else if (USB_HostState == HOST_STATE_Unattached)
 155                   return PIPE_READYWAIT_DeviceDisconnected;
 156
 157                 uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
 158
 159                 if (CurrentFrameNumber != PreviousFrameNumber)
 160                 {
 161                         PreviousFrameNumber = CurrentFrameNumber;
 162
 163                         if (!(TimeoutMSRem--))
 164                           return PIPE_READYWAIT_Timeout;
 165                 }
 166         }
 167 }
 168
 169 #endif