LUFA/Drivers/USB/Core/AVR8/Pipe_AVR8.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 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 UPIENXTemp;
  66
  67                 Pipe_SelectPipe(PNum);
  68
  69                 if (PNum == Number)
  70                 {
  71                         UPCFG0XTemp = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
  72                         UPCFG1XTemp = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
  73                         UPCFG2XTemp = 0;
  74                         UPIENXTemp  = 0;
  75                 }
  76                 else
  77                 {
  78                         UPCFG0XTemp = UPCFG0X;
  79                         UPCFG1XTemp = UPCFG1X;
  80                         UPCFG2XTemp = UPCFG2X;
  81                         UPIENXTemp  = UPIENX;
  82                 }
  83
  84                 if (!(UPCFG1XTemp & (1 << ALLOC)))
  85                   continue;
  86
  87                 Pipe_DisablePipe();
  88                 UPCFG1X &= ~(1 << ALLOC);
  89
  90                 Pipe_EnablePipe();
  91                 UPCFG0X = UPCFG0XTemp;
  92                 UPCFG1X = UPCFG1XTemp;
  93                 UPCFG2X = UPCFG2XTemp;
  94                 UPIENX  = UPIENXTemp;
  95
  96                 Pipe_SetInfiniteINRequests();
  97
  98                 if (!(Pipe_IsConfigured()))
  99                   return false;
 100         }
 101
 102         Pipe_SelectPipe(Number);
 103         return true;
 104 #endif
 105 }
 106
 107 void Pipe_ClearPipes(void)
 108 {
 109         UPINT = 0;
 110
 111         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
 112         {
 113                 Pipe_SelectPipe(PNum);
 114                 UPIENX  = 0;
 115                 UPINTX  = 0;
 116                 UPCFG1X = 0;
 117                 Pipe_DisablePipe();
 118         }
 119 }
 120
 121 bool Pipe_IsEndpointBound(const uint8_t EndpointAddress)
 122 {
 123         uint8_t PrevPipeNumber = Pipe_GetCurrentPipe();
 124
 125         for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
 126         {
 127                 Pipe_SelectPipe(PNum);
 128
 129                 if (!(Pipe_IsConfigured()))
 130                   continue;
 131
 132                 if (Pipe_GetBoundEndpointAddress() == EndpointAddress)
 133                   return true;
 134         }
 135
 136         Pipe_SelectPipe(PrevPipeNumber);
 137         return false;
 138 }
 139
 140 uint8_t Pipe_WaitUntilReady(void)
 141 {
 142         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 143         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 144         #else
 145         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 146         #endif
 147
 148         uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber();
 149
 150         for (;;)
 151         {
 152                 if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 153                 {
 154                         if (Pipe_IsINReceived())
 155                           return PIPE_READYWAIT_NoError;
 156                 }
 157                 else
 158                 {
 159                         if (Pipe_IsOUTReady())
 160                           return PIPE_READYWAIT_NoError;
 161                 }
 162
 163                 if (Pipe_IsStalled())
 164                   return PIPE_READYWAIT_PipeStalled;
 165                 else if (USB_HostState == HOST_STATE_Unattached)
 166                   return PIPE_READYWAIT_DeviceDisconnected;
 167
 168                 uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber();
 169
 170                 if (CurrentFrameNumber != PreviousFrameNumber)
 171                 {
 172                         PreviousFrameNumber = CurrentFrameNumber;
 173
 174                         if (!(TimeoutMSRem--))
 175                           return PIPE_READYWAIT_Timeout;
 176                 }
 177         }
 178 }
 179
 180 #endif
 181