LUFA/Drivers/USB/LowLevel/Pipe.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 "../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 #if defined(ORDERED_EP_CONFIG)
  48         Pipe_SelectPipe(Number);
  49         Pipe_EnablePipe();
  50
  51         UPCFG1X = 0;
  52
  53         UPCFG0X = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
  54         UPCFG1X = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
  55
  56         Pipe_SetInfiniteINRequests();
  57
  58         return Pipe_IsConfigured();
  59 #else
  60         for (uint8_t PNum = Number; PNum < PIPE_TOTAL_PIPES; PNum++)
  61         {
  62                 uint8_t UPCFG0XTemp;
  63                 uint8_t UPCFG1XTemp;
  64                 uint8_t UPCFG2XTemp;
  65                 uint8_t UPCONXTemp;
  66                 uint8_t UPINRQXTemp;
  67                 uint8_t UPIENXTemp;
  68
  69                 Pipe_SelectPipe(PNum);
  70
  71                 if (PNum == Number)
  72                 {
  73                         UPCFG0XTemp = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
  74                         UPCFG1XTemp = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
  75                         UPCFG2XTemp = 0;
  76                         UPCONXTemp  = ((1 << PEN) | (1 << INMODE));
  77                         UPINRQXTemp = 0;
  78                         UPIENXTemp  = 0;
  79                 }
  80                 else
  81                 {
  82                         UPCFG0XTemp = UPCFG0X;
  83                         UPCFG1XTemp = UPCFG1X;
  84                         UPCFG2XTemp = UPCFG2X;
  85                         UPCONXTemp  = UPCONX;
  86                         UPINRQXTemp = UPINRQX;
  87                         UPIENXTemp  = UPIENX;
  88                 }
  89
  90                 if (!(UPCFG1XTemp & (1 << ALLOC)))
  91                   continue;
  92
  93                 Pipe_DisablePipe();
  94                 UPCFG1X &= (1 << ALLOC);
  95
  96                 Pipe_EnablePipe();
  97                 UPCFG0X = UPCFG0XTemp;
  98                 UPCFG1X = UPCFG1XTemp;
  99                 UPCFG2X = UPCFG2XTemp;
 100                 UPCONX  = UPCONXTemp;
 101                 UPINRQX = UPINRQXTemp;
 102                 UPIENX  = UPIENXTemp;
 103
 104                 if (!(Pipe_IsConfigured()))
 105                   return false;
 106         }
 107
 108         Pipe_SelectPipe(Number);
 109         return true;
 110 #endif
 111 }
 112
 113 void Pipe_ClearPipes(void)
 114 {
 115         UPINT = 0;
 116
 117         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
 118         {
 119                 Pipe_SelectPipe(PNum);
 120                 UPIENX  = 0;
 121                 UPINTX  = 0;
 122                 UPCFG1X = 0;
 123                 Pipe_DisablePipe();
 124         }
 125 }
 126
 127 bool Pipe_IsEndpointBound(const uint8_t EndpointAddress)
 128 {
 129         uint8_t PrevPipeNumber = Pipe_GetCurrentPipe();
 130
 131         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
 132         {
 133                 Pipe_SelectPipe(PNum);
 134
 135                 if (!(Pipe_IsConfigured()))
 136                   continue;
 137
 138                 uint8_t PipeToken        = Pipe_GetPipeToken();
 139                 bool    PipeTokenCorrect = true;
 140
 141                 if (PipeToken != PIPE_TOKEN_SETUP)
 142                   PipeTokenCorrect = (PipeToken == ((EndpointAddress & PIPE_EPDIR_MASK) ? PIPE_TOKEN_IN : PIPE_TOKEN_OUT));
 143
 144                 if (PipeTokenCorrect && (Pipe_BoundEndpointNumber() == (EndpointAddress & PIPE_EPNUM_MASK)))
 145                   return true;
 146         }
 147
 148         Pipe_SelectPipe(PrevPipeNumber);
 149         return false;
 150 }
 151
 152 uint8_t Pipe_WaitUntilReady(void)
 153 {
 154         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 155         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 156         #else
 157         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 158         #endif
 159
 160         uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
 161
 162         for (;;)
 163         {
 164                 if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 165                 {
 166                         if (Pipe_IsINReceived())
 167                           return PIPE_READYWAIT_NoError;
 168                 }
 169                 else
 170                 {
 171                         if (Pipe_IsOUTReady())
 172                           return PIPE_READYWAIT_NoError;
 173                 }
 174
 175                 if (Pipe_IsStalled())
 176                   return PIPE_READYWAIT_PipeStalled;
 177                 else if (USB_HostState == HOST_STATE_Unattached)
 178                   return PIPE_READYWAIT_DeviceDisconnected;
 179
 180                 uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
 181
 182                 if (CurrentFrameNumber != PreviousFrameNumber)
 183                 {
 184                         PreviousFrameNumber = CurrentFrameNumber;
 185
 186                         if (!(TimeoutMSRem--))
 187                           return PIPE_READYWAIT_Timeout;
 188                 }
 189         }
 190 }
 191
 192 #endif
 193