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