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 #include "../../../../Common/Common.h"
  32 #if (ARCH == ARCH_XMEGA)
  33
  34 #define  __INCLUDE_FROM_USB_DRIVER
  35 #include "../USBMode.h"
  36
  37 #if defined(USB_CAN_BE_DEVICE)
  38
  39 #include "../Endpoint.h"
  40
  41 #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
  42 uint8_t USB_Device_ControlEndpointSize = ENDPOINT_CONTROLEP_DEFAULT_SIZE;
  43 #endif
  44
  45 Endpoint_FIFOPair_t       USB_Endpoint_FIFOs[ENDPOINT_TOTAL_ENDPOINTS];
  46
  47 volatile uint8_t          USB_Endpoint_SelectedEndpoint;
  48 volatile USB_EP_t*        USB_Endpoint_SelectedHandle;
  49 volatile Endpoint_FIFO_t* USB_Endpoint_SelectedFIFO;
  50
  51 bool Endpoint_ConfigureEndpoint_PRV(const uint8_t Number,
  52                                     const uint8_t Direction,
  53                                     const uint8_t Config,
  54                                     const uint8_t Size)
  55 {
  56         Endpoint_SelectEndpoint(Number | Direction);
  57
  58         USB_Endpoint_SelectedHandle->CTRL    = 0;
  59         USB_Endpoint_SelectedHandle->STATUS  = (Direction == ENDPOINT_DIR_IN) ? USB_EP_BUSNACK0_bm : 0;
  60         USB_Endpoint_SelectedHandle->CTRL    = Config;
  61         USB_Endpoint_SelectedHandle->CNT     = 0;
  62         USB_Endpoint_SelectedHandle->DATAPTR = (intptr_t)USB_Endpoint_SelectedFIFO->Data;
  63
  64         USB_Endpoint_SelectedFIFO->Length    = (Direction == ENDPOINT_DIR_IN) ? Size : 0;
  65         USB_Endpoint_SelectedFIFO->Position  = 0;
  66
  67         return true;
  68 }
  69
  70 void Endpoint_ClearEndpoints(void)
  71 {
  72         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  73         {
  74                 USB_EndpointTable.Endpoints[EPNum].IN.CTRL  = 0;
  75                 USB_EndpointTable.Endpoints[EPNum].OUT.CTRL = 0;
  76         }
  77 }
  78
  79 void Endpoint_ClearStatusStage(void)
  80 {
  81         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
  82         {
  83                 while (!(Endpoint_IsOUTReceived()))
  84                 {
  85                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  86                           return;
  87                 }
  88
  89                 Endpoint_ClearOUT();
  90         }
  91         else
  92         {
  93                 while (!(Endpoint_IsINReady()))
  94                 {
  95                         if (USB_DeviceState == DEVICE_STATE_Unattached)
  96                           return;
  97                 }
  98
  99                 Endpoint_ClearIN();
 100         }
 101 }
 102
 103 #if !defined(CONTROL_ONLY_DEVICE)
 104 uint8_t Endpoint_WaitUntilReady(void)
 105 {
 106         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 107         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 108         #else
 109         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 110         #endif
 111
 112         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 113
 114         for (;;)
 115         {
 116                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 117                 {
 118                         if (Endpoint_IsINReady())
 119                           return ENDPOINT_READYWAIT_NoError;
 120                 }
 121                 else
 122                 {
 123                         if (Endpoint_IsOUTReceived())
 124                           return ENDPOINT_READYWAIT_NoError;
 125                 }
 126
 127                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 128
 129                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 130                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 131                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 132                   return ENDPOINT_READYWAIT_BusSuspended;
 133                 else if (Endpoint_IsStalled())
 134                   return ENDPOINT_READYWAIT_EndpointStalled;
 135
 136                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 137
 138                 if (CurrentFrameNumber != PreviousFrameNumber)
 139                 {
 140                         PreviousFrameNumber = CurrentFrameNumber;
 141
 142                         if (!(TimeoutMSRem--))
 143                           return ENDPOINT_READYWAIT_Timeout;
 144                 }
 145         }
 146 }
 147 #endif
 148
 149 #endif
 150
 151 #endif
 152