LUFA/Drivers/USB/Core/XMEGA/Endpoint_XMEGA.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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_TOTAL_ENDPOINTS];
  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;
  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; EPNum++)
  70         {
  71                 USB_EndpointTable.Endpoints[EPNum].IN.CTRL  = 0;
  72                 USB_EndpointTable.Endpoints[EPNum].OUT.CTRL = 0;
  73         }
  74 }
  75
  76 void Endpoint_ClearStatusStage(void)
  77 {
  78         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
  79         {
  80                 while (!(Endpoint_IsOUTReceived()))
  81                 {
  82                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  83                           return;
  84                 }
  85
  86                 Endpoint_ClearOUT();
  87         }
  88         else
  89         {
  90                 while (!(Endpoint_IsINReady()))
  91                 {
  92                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  93                           return;
  94                 }
  95
  96                 Endpoint_ClearIN();
  97         }
  98 }
  99
 100 #if !defined(CONTROL_ONLY_DEVICE)
 101 uint8_t Endpoint_WaitUntilReady(void)
 102 {
 103         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 104         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 105         #else
 106         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 107         #endif
 108
 109         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 110
 111         for (;;)
 112         {
 113                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 114                 {
 115                         if (Endpoint_IsINReady())
 116                           return ENDPOINT_READYWAIT_NoError;
 117                 }
 118                 else
 119                 {
 120                         if (Endpoint_IsOUTReceived())
 121                           return ENDPOINT_READYWAIT_NoError;
 122                 }
 123
 124                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 125
 126                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 127                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 128                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 129                   return ENDPOINT_READYWAIT_BusSuspended;
 130                 else if (Endpoint_IsStalled())
 131                   return ENDPOINT_READYWAIT_EndpointStalled;
 132
 133                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 134
 135                 if (CurrentFrameNumber != PreviousFrameNumber)
 136                 {
 137                         PreviousFrameNumber = CurrentFrameNumber;
 138
 139                         if (!(TimeoutMSRem--))
 140                           return ENDPOINT_READYWAIT_Timeout;
 141                 }
 142         }
 143 }
 144 #endif
 145
 146 #endif
 147