LUFA/Drivers/USB/Core/XMEGA/Endpoint_XMEGA.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_DEVICE)
  35
  36 #include "../Endpoint.h"
  37
  38 #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
  39 uint8_t USB_Device_ControlEndpointSize = ENDPOINT_CONTROLEP_DEFAULT_SIZE;
  40 #endif
  41
  42 Endpoint_FIFOPair_t           USB_Endpoint_FIFOs[ENDPOINT_DETAILS_MAXEP];
  43
  44 volatile uint8_t              USB_Endpoint_SelectedEndpoint;
  45 volatile USB_EP_t*            USB_Endpoint_SelectedHandle;
  46 volatile Endpoint_FIFO_t* USB_Endpoint_SelectedFIFO;
  47
  48 bool Endpoint_ConfigureEndpoint_PRV(const uint8_t Number,
  49                                     const uint8_t Direction,
  50                                     const uint8_t Config,
  51                                     const uint8_t Size)
  52 {
  53         Endpoint_SelectEndpoint(Number | Direction);
  54
  55         USB_Endpoint_SelectedHandle->CTRL      = 0;
  56         USB_Endpoint_SelectedHandle->STATUS    = (Direction == ENDPOINT_DIR_IN) ? USB_EP_BUSNACK0_bm : 0;
  57         USB_Endpoint_SelectedHandle->CTRL      = Config;
  58         USB_Endpoint_SelectedHandle->CNT       = 0;
  59         USB_Endpoint_SelectedHandle->DATAPTR   = (intptr_t)&USB_Endpoint_SelectedFIFO->Data[0];
  60
  61         USB_Endpoint_SelectedFIFO->Length      = (Direction == ENDPOINT_DIR_IN) ? Size : 0;
  62         USB_Endpoint_SelectedFIFO->Position    = 0;
  63
  64         return true;
  65 }
  66
  67 void Endpoint_ClearEndpoints(void)
  68 {
  69         for (uint8_t EPNum = 0; EPNum < (ENDPOINT_TOTAL_ENDPOINTS * 2); EPNum++)
  70           ((USB_EP_t*)&USB_EndpointTable)[EPNum].CTRL = 0;
  71 }
  72
  73 void Endpoint_ClearStatusStage(void)
  74 {
  75         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
  76         {
  77                 while (!(Endpoint_IsOUTReceived()))
  78                 {
  79                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  80                           return;
  81                 }
  82
  83                 Endpoint_ClearOUT();
  84         }
  85         else
  86         {
  87                 while (!(Endpoint_IsINReady()))
  88                 {
  89                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  90                           return;
  91                 }
  92
  93                 Endpoint_ClearIN();
  94         }
  95 }
  96
  97 #if !defined(CONTROL_ONLY_DEVICE)
  98 uint8_t Endpoint_WaitUntilReady(void)
  99 {
 100         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 101         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 102         #else
 103         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 104         #endif
 105
 106         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 107
 108         for (;;)
 109         {
 110                 if (Endpoint_IsOUTReceived())
 111                   return ENDPOINT_READYWAIT_NoError;
 112
 113                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 114
 115                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 116                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 117                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 118                   return ENDPOINT_READYWAIT_BusSuspended;
 119                 else if (Endpoint_IsStalled())
 120                   return ENDPOINT_READYWAIT_EndpointStalled;
 121
 122                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 123
 124                 if (CurrentFrameNumber != PreviousFrameNumber)
 125                 {
 126                         PreviousFrameNumber = CurrentFrameNumber;
 127
 128                         if (!(TimeoutMSRem--))
 129                           return ENDPOINT_READYWAIT_Timeout;
 130                 }
 131         }
 132 }
 133 #endif
 134
 135 #endif
 136