LUFA/Drivers/USB/Core/UC3B/Endpoint.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_ControlEndpointSize = ENDPOINT_CONTROLEP_DEFAULT_SIZE;
  40 #endif
  41
  42 uint8_t USB_SelectedEndpoint = ENDPOINT_CONTROLEP;
  43
  44 bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
  45                                     const uint32_t UECFGXData)
  46 {
  47 #if defined(CONTROL_ONLY_DEVICE) || defined(ORDERED_EP_CONFIG)
  48         Endpoint_SelectEndpoint(Number);
  49         Endpoint_EnableEndpoint();
  50
  51         *((uint32_t*)AVR32_USBB_UECFG0)[USB_SelectedEndpoint] = 0;
  52         *((uint32_t*)AVR32_USBB_UECFG0)[USB_SelectedEndpoint] = UECFGXData;
  53
  54         return Endpoint_IsConfigured();
  55 #else
  56         for (uint8_t EPNum = Number; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  57         {
  58                 uint32_t UECFGXTemp;
  59                 uint32_t UEIENXTemp;
  60
  61                 Endpoint_SelectEndpoint(EPNum);
  62
  63                 if (EPNum == Number)
  64                 {
  65                         UECFGXTemp = UECFGXData;
  66                         UEIENXTemp = 0;
  67                 }
  68                 else
  69                 {
  70                         UECFGXTemp = *((uint32_t*)AVR32_USBB_UECFG0)[EPNum];
  71                         UEIENXTemp = *((uint32_t*)AVR32_USBB_UEINT0)[EPNum];
  72                 }
  73
  74                 if (!(UECFGXTemp & AVR32_USBB_ALLOC))
  75                   continue;
  76
  77                 Endpoint_DisableEndpoint();
  78                 *((uint32_t*)AVR32_USBB_UECFG0)[USB_SelectedEndpoint] &= ~AVR32_USBB_ALLOC;
  79
  80                 Endpoint_EnableEndpoint();
  81                 *((uint32_t*)AVR32_USBB_UECFG0)[EPNum] = UECFGXTemp;
  82                 *((uint32_t*)AVR32_USBB_UEINT0)[EPNum] = UEINTXTemp;
  83
  84                 if (!(Endpoint_IsConfigured()))
  85                   return false;
  86         }
  87
  88         Endpoint_SelectEndpoint(Number);
  89         return true;
  90 #endif
  91 }
  92
  93 void Endpoint_ClearEndpoints(void)
  94 {
  95         UEINT = 0;
  96
  97         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  98         {
  99                 Endpoint_SelectEndpoint(EPNum);
 100                 UEIENX  = 0;
 101                 UEINTX  = 0;
 102                 UECFG1X = 0;
 103                 Endpoint_DisableEndpoint();
 104         }
 105 }
 106
 107 void Endpoint_ClearStatusStage(void)
 108 {
 109         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
 110         {
 111                 while (!(Endpoint_IsOUTReceived()))
 112                 {
 113                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 114                           return;
 115                 }
 116
 117                 Endpoint_ClearOUT();
 118         }
 119         else
 120         {
 121                 while (!(Endpoint_IsINReady()))
 122                 {
 123                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 124                           return;
 125                 }
 126
 127                 Endpoint_ClearIN();
 128         }
 129 }
 130
 131 #if !defined(CONTROL_ONLY_DEVICE)
 132 uint8_t Endpoint_WaitUntilReady(void)
 133 {
 134         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 135         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 136         #else
 137         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 138         #endif
 139
 140         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 141
 142         for (;;)
 143         {
 144                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 145                 {
 146                         if (Endpoint_IsINReady())
 147                           return ENDPOINT_READYWAIT_NoError;
 148                 }
 149                 else
 150                 {
 151                         if (Endpoint_IsOUTReceived())
 152                           return ENDPOINT_READYWAIT_NoError;
 153                 }
 154
 155                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 156
 157                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 158                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 159                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 160                   return ENDPOINT_READYWAIT_BusSuspended;
 161                 else if (Endpoint_IsStalled())
 162                   return ENDPOINT_READYWAIT_EndpointStalled;
 163
 164                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 165
 166                 if (CurrentFrameNumber != PreviousFrameNumber)
 167                 {
 168                         PreviousFrameNumber = CurrentFrameNumber;
 169
 170                         if (!(TimeoutMSRem--))
 171                           return ENDPOINT_READYWAIT_Timeout;
 172                 }
 173         }
 174 }
 175 #endif
 176
 177 #endif
 178