LUFA/Drivers/USB/LowLevel/Endpoint.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2010  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 "../HighLevel/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 bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
  43                                     const uint8_t UECFG0XData,
  44                                     const uint8_t UECFG1XData)
  45 {
  46 #if defined(CONTROL_ONLY_DEVICE) || defined(ORDERED_EP_CONFIG)
  47         Endpoint_SelectEndpoint(Number);
  48         Endpoint_EnableEndpoint();
  49
  50         UECFG1X = 0;
  51         UECFG0X = UECFG0XData;
  52         UECFG1X = UECFG1XData;
  53
  54         return Endpoint_IsConfigured();
  55 #else
  56         uint8_t UECFG0XTemp[ENDPOINT_TOTAL_ENDPOINTS];
  57         uint8_t UECFG1XTemp[ENDPOINT_TOTAL_ENDPOINTS];
  58         uint8_t UEIENXTemp[ENDPOINT_TOTAL_ENDPOINTS];
  59
  60         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  61         {
  62                 Endpoint_SelectEndpoint(EPNum);
  63                 UECFG0XTemp[EPNum] = UECFG0X;
  64                 UECFG1XTemp[EPNum] = UECFG1X;
  65                 UEIENXTemp[EPNum]  = UEIENX;
  66         }
  67
  68         UECFG0XTemp[Number] = UECFG0XData;
  69         UECFG1XTemp[Number] = UECFG1XData;
  70         UEIENXTemp[Number]  = 0;
  71
  72         for (uint8_t EPNum = 1; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  73         {
  74                 Endpoint_SelectEndpoint(EPNum);
  75                 UEIENX  = 0;
  76                 UEINTX  = 0;
  77                 UECFG1X = 0;
  78                 Endpoint_DisableEndpoint();
  79         }
  80
  81         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  82         {
  83                 if (!(UECFG1XTemp[EPNum] & (1 << ALLOC)))
  84                   continue;
  85
  86                 Endpoint_SelectEndpoint(EPNum);
  87                 Endpoint_EnableEndpoint();
  88
  89                 UECFG0X = UECFG0XTemp[EPNum];
  90                 UECFG1X = UECFG1XTemp[EPNum];
  91                 UEIENX  = UEIENXTemp[EPNum];
  92
  93                 if (!(Endpoint_IsConfigured()))
  94                   return false;
  95         }
  96
  97         Endpoint_SelectEndpoint(Number);
  98         return true;
  99 #endif
 100 }
 101
 102 void Endpoint_ClearEndpoints(void)
 103 {
 104         UEINT = 0;
 105
 106         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
 107         {
 108                 Endpoint_SelectEndpoint(EPNum);
 109                 UEIENX  = 0;
 110                 UEINTX  = 0;
 111                 UECFG1X = 0;
 112                 Endpoint_DisableEndpoint();
 113         }
 114 }
 115
 116 void Endpoint_ClearStatusStage(void)
 117 {
 118         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
 119         {
 120                 while (!(Endpoint_IsOUTReceived()))
 121                 {
 122                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 123                           return;
 124                 }
 125
 126                 Endpoint_ClearOUT();
 127         }
 128         else
 129         {
 130                 while (!(Endpoint_IsINReady()))
 131                 {
 132                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 133                           return;
 134                 }
 135
 136                 Endpoint_ClearIN();
 137         }
 138 }
 139
 140 #if !defined(CONTROL_ONLY_DEVICE)
 141 uint8_t Endpoint_WaitUntilReady(void)
 142 {
 143         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 144         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 145         #else
 146         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 147         #endif
 148
 149         uint16_t PreviousFrameNumber = USB_Device_GetFrameNumber();
 150
 151         for (;;)
 152         {
 153                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 154                 {
 155                         if (Endpoint_IsINReady())
 156                           return ENDPOINT_READYWAIT_NoError;
 157                 }
 158                 else
 159                 {
 160                         if (Endpoint_IsOUTReceived())
 161                           return ENDPOINT_READYWAIT_NoError;
 162                 }
 163
 164                 uint8_t USB_DeviceState_LCL = USB_DeviceState;
 165
 166                 if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
 167                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 168                 else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
 169                   return ENDPOINT_READYWAIT_BusSuspended;
 170                 else if (Endpoint_IsStalled())
 171                   return ENDPOINT_READYWAIT_EndpointStalled;
 172
 173                 uint16_t CurrentFrameNumber = USB_Device_GetFrameNumber();
 174
 175                 if (CurrentFrameNumber != PreviousFrameNumber)
 176                 {
 177                         PreviousFrameNumber = CurrentFrameNumber;
 178
 179                         if (!(TimeoutMSRem--))
 180                           return ENDPOINT_READYWAIT_Timeout;
 181                 }
 182         }
 183 }
 184 #endif
 185
 186 #endif
 187