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 disclaims 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_ConfigureEndpointTable(const USB_Endpoint_Table_t* const Table,
  52                                      const uint8_t Entries)
  53 {
  54         for (uint8_t i = 0; i < Entries; i++)
  55         {
  56                 if (!(Table[i].Address))
  57                   continue;
  58
  59                 if (!(Endpoint_ConfigureEndpoint(Table[i].Address, Table[i].Type, Table[i].Size, Table[i].Banks)))
  60                 {
  61                         return false;
  62                 }
  63         }
  64
  65         return true;
  66 }
  67
  68 bool Endpoint_ConfigureEndpoint_PRV(const uint8_t Address,
  69                                     const uint8_t Config,
  70                                     const uint8_t Size)
  71 {
  72         Endpoint_SelectEndpoint(Address);
  73
  74         USB_Endpoint_SelectedHandle->CTRL    = 0;
  75         USB_Endpoint_SelectedHandle->STATUS  = (Address & ENDPOINT_DIR_IN) ? USB_EP_BUSNACK0_bm : 0;
  76         USB_Endpoint_SelectedHandle->CTRL    = Config;
  77         USB_Endpoint_SelectedHandle->CNT     = 0;
  78         USB_Endpoint_SelectedHandle->DATAPTR = (intptr_t)USB_Endpoint_SelectedFIFO->Data;
  79
  80         USB_Endpoint_SelectedFIFO->Length    = (Address & ENDPOINT_DIR_IN) ? Size : 0;
  81         USB_Endpoint_SelectedFIFO->Position  = 0;
  82
  83         return true;
  84 }
  85
  86 void Endpoint_ClearEndpoints(void)
  87 {
  88         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  89         {
  90                 ((USB_EndpointTable_t*)USB.EPPTR)->Endpoints[EPNum].IN.CTRL  = 0;
  91                 ((USB_EndpointTable_t*)USB.EPPTR)->Endpoints[EPNum].OUT.CTRL = 0;
  92         }
  93 }
  94
  95 void Endpoint_ClearStatusStage(void)
  96 {
  97         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
  98         {
  99                 while (!(Endpoint_IsOUTReceived()))
 100                 {
 101                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 102                           return;
 103                 }
 104
 105                 Endpoint_ClearOUT();
 106         }
 107         else
 108         {
 109                 while (!(Endpoint_IsINReady()))
 110                 {
 111                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 112                           return;
 113                 }
 114
 115                 Endpoint_ClearIN();
 116         }
 117 }
 118
 119 #if !defined(CONTROL_ONLY_DEVICE)
 120 uint8_t Endpoint_WaitUntilReady(void)
 121 {
 122         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 123         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 124         #else
 125         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 126         #endif
 127
 128         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 129
 130         for (;;)
 131         {
 132                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 133                 {
 134                         if (Endpoint_IsINReady())
 135                           return ENDPOINT_READYWAIT_NoError;
 136                 }
 137                 else
 138                 {
 139                         if (Endpoint_IsOUTReceived())
 140                           return ENDPOINT_READYWAIT_NoError;
 141                 }
 142
 143                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 144
 145                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 146                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 147                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 148                   return ENDPOINT_READYWAIT_BusSuspended;
 149                 else if (Endpoint_IsStalled())
 150                   return ENDPOINT_READYWAIT_EndpointStalled;
 151
 152                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 153
 154                 if (CurrentFrameNumber != PreviousFrameNumber)
 155                 {
 156                         PreviousFrameNumber = CurrentFrameNumber;
 157
 158                         if (!(TimeoutMSRem--))
 159                           return ENDPOINT_READYWAIT_Timeout;
 160                 }
 161         }
 162 }
 163 #endif
 164
 165 #endif
 166
 167 #endif
 168