LUFA/Drivers/USB/Core/UC3/Endpoint_UC3.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 volatile uint32_t USB_SelectedEndpoint = ENDPOINT_CONTROLEP;
  43 volatile uint8_t* USB_EndpointFIFOPos[ENDPOINT_TOTAL_ENDPOINTS];
  44
  45 bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
  46                                     const uint32_t UECFG0Data)
  47 {
  48 #if defined(CONTROL_ONLY_DEVICE) || defined(ORDERED_EP_CONFIG)
  49         Endpoint_SelectEndpoint(Number);
  50         Endpoint_EnableEndpoint();
  51
  52         (&AVR32_USBB.uecfg0)[Number] = 0;
  53         (&AVR32_USBB.uecfg0)[Number] = UECFG0Data;
  54         USB_EndpointFIFOPos[Number]  = &AVR32_USBB_SLAVE[Number * 0x10000];
  55
  56         return Endpoint_IsConfigured();
  57 #else
  58         for (uint8_t EPNum = Number; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  59         {
  60                 uint8_t UECFG0Temp;
  61
  62                 Endpoint_SelectEndpoint(EPNum);
  63
  64                 if (EPNum == Number)
  65                 {
  66                         UECFG0Temp = UECFG0Data;
  67                 }
  68                 else
  69                 {
  70                         UECFG0Temp = (&AVR32_USBB.uecfg0)[EPNum];
  71                 }
  72
  73                 if (!(UECFG0Temp & AVR32_USBB_ALLOC_MASK))
  74                   continue;
  75
  76                 Endpoint_DisableEndpoint();
  77                 (&AVR32_USBB.uecfg0)[EPNum] &= ~AVR32_USBB_ALLOC_MASK;
  78
  79                 Endpoint_EnableEndpoint();
  80                 (&AVR32_USBB.uecfg0)[EPNum] = UECFG0Temp;
  81
  82                 if (!(Endpoint_IsConfigured()))
  83                   return false;
  84         }
  85
  86         Endpoint_SelectEndpoint(Number);
  87         return true;
  88 #endif
  89 }
  90
  91 void Endpoint_ClearEndpoints(void)
  92 {
  93         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  94         {
  95                 Endpoint_SelectEndpoint(EPNum);
  96                 (&AVR32_USBB.uecfg0)[EPNum]    = 0;
  97                 (&AVR32_USBB.uecon0clr)[EPNum] = -1;
  98                 USB_EndpointFIFOPos[EPNum]     = &AVR32_USBB_SLAVE[EPNum * 0x10000];
  99                 Endpoint_DisableEndpoint();
 100         }
 101 }
 102
 103 void Endpoint_ClearStatusStage(void)
 104 {
 105         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
 106         {
 107                 while (!(Endpoint_IsOUTReceived()))
 108                 {
 109                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 110                           return;
 111                 }
 112
 113                 Endpoint_ClearOUT();
 114         }
 115         else
 116         {
 117                 while (!(Endpoint_IsINReady()))
 118                 {
 119                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 120                           return;
 121                 }
 122
 123                 Endpoint_ClearIN();
 124         }
 125 }
 126
 127 #if !defined(CONTROL_ONLY_DEVICE)
 128 uint8_t Endpoint_WaitUntilReady(void)
 129 {
 130         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 131         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 132         #else
 133         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 134         #endif
 135
 136         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 137
 138         for (;;)
 139         {
 140                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 141                 {
 142                         if (Endpoint_IsINReady())
 143                           return ENDPOINT_READYWAIT_NoError;
 144                 }
 145                 else
 146                 {
 147                         if (Endpoint_IsOUTReceived())
 148                           return ENDPOINT_READYWAIT_NoError;
 149                 }
 150
 151                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 152
 153                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 154                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 155                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 156                   return ENDPOINT_READYWAIT_BusSuspended;
 157                 else if (Endpoint_IsStalled())
 158                   return ENDPOINT_READYWAIT_EndpointStalled;
 159
 160                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 161
 162                 if (CurrentFrameNumber != PreviousFrameNumber)
 163                 {
 164                         PreviousFrameNumber = CurrentFrameNumber;
 165
 166                         if (!(TimeoutMSRem--))
 167                           return ENDPOINT_READYWAIT_Timeout;
 168                 }
 169         }
 170 }
 171 #endif
 172
 173 #endif
 174