LUFA/Drivers/USB/Core/AVR8/Endpoint_AVR8.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_AVR8)
  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 bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
  46                                     const uint8_t UECFG0XData,
  47                                     const uint8_t UECFG1XData)
  48 {
  49 #if defined(CONTROL_ONLY_DEVICE) || defined(ORDERED_EP_CONFIG)
  50         Endpoint_SelectEndpoint(Number);
  51         Endpoint_EnableEndpoint();
  52
  53         UECFG1X = 0;
  54         UECFG0X = UECFG0XData;
  55         UECFG1X = UECFG1XData;
  56
  57         return Endpoint_IsConfigured();
  58 #else
  59         for (uint8_t EPNum = Number; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  60         {
  61                 uint8_t UECFG0XTemp;
  62                 uint8_t UECFG1XTemp;
  63                 uint8_t UEIENXTemp;
  64
  65                 Endpoint_SelectEndpoint(EPNum);
  66
  67                 if (EPNum == Number)
  68                 {
  69                         UECFG0XTemp = UECFG0XData;
  70                         UECFG1XTemp = UECFG1XData;
  71                         UEIENXTemp  = 0;
  72                 }
  73                 else
  74                 {
  75                         UECFG0XTemp = UECFG0X;
  76                         UECFG1XTemp = UECFG1X;
  77                         UEIENXTemp  = UEIENX;
  78                 }
  79
  80                 if (!(UECFG1XTemp & (1 << ALLOC)))
  81                   continue;
  82
  83                 Endpoint_DisableEndpoint();
  84                 UECFG1X &= ~(1 << ALLOC);
  85
  86                 Endpoint_EnableEndpoint();
  87                 UECFG0X = UECFG0XTemp;
  88                 UECFG1X = UECFG1XTemp;
  89                 UEIENX  = UEIENXTemp;
  90
  91                 if (!(Endpoint_IsConfigured()))
  92                   return false;
  93         }
  94
  95         Endpoint_SelectEndpoint(Number);
  96         return true;
  97 #endif
  98 }
  99
 100 void Endpoint_ClearEndpoints(void)
 101 {
 102         UEINT = 0;
 103
 104         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
 105         {
 106                 Endpoint_SelectEndpoint(EPNum);
 107                 UEIENX  = 0;
 108                 UEINTX  = 0;
 109                 UECFG1X = 0;
 110                 Endpoint_DisableEndpoint();
 111         }
 112 }
 113
 114 void Endpoint_ClearStatusStage(void)
 115 {
 116         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
 117         {
 118                 while (!(Endpoint_IsOUTReceived()))
 119                 {
 120                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 121                           return;
 122                 }
 123
 124                 Endpoint_ClearOUT();
 125         }
 126         else
 127         {
 128                 while (!(Endpoint_IsINReady()))
 129                 {
 130                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 131                           return;
 132                 }
 133
 134                 Endpoint_ClearIN();
 135         }
 136 }
 137
 138 #if !defined(CONTROL_ONLY_DEVICE)
 139 uint8_t Endpoint_WaitUntilReady(void)
 140 {
 141         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 142         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 143         #else
 144         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 145         #endif
 146
 147         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 148
 149         for (;;)
 150         {
 151                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 152                 {
 153                         if (Endpoint_IsINReady())
 154                           return ENDPOINT_READYWAIT_NoError;
 155                 }
 156                 else
 157                 {
 158                         if (Endpoint_IsOUTReceived())
 159                           return ENDPOINT_READYWAIT_NoError;
 160                 }
 161
 162                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 163
 164                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 165                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 166                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 167                   return ENDPOINT_READYWAIT_BusSuspended;
 168                 else if (Endpoint_IsStalled())
 169                   return ENDPOINT_READYWAIT_EndpointStalled;
 170
 171                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 172
 173                 if (CurrentFrameNumber != PreviousFrameNumber)
 174                 {
 175                         PreviousFrameNumber = CurrentFrameNumber;
 176
 177                         if (!(TimeoutMSRem--))
 178                           return ENDPOINT_READYWAIT_Timeout;
 179                 }
 180         }
 181 }
 182 #endif
 183
 184 #endif
 185
 186 #endif