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.fourwalledcubicle.com
   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         uint8_t UECFG0XTemp[ENDPOINT_TOTAL_ENDPOINTS];
  47         uint8_t UECFG1XTemp[ENDPOINT_TOTAL_ENDPOINTS];
  48
  49         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  50         {
  51                 Endpoint_SelectEndpoint(EPNum);
  52                 UECFG0XTemp[EPNum] = UECFG0X;
  53                 UECFG1XTemp[EPNum] = UECFG1X;
  54         }
  55
  56         UECFG0XTemp[Number] = UECFG0XData;
  57         UECFG1XTemp[Number] = UECFG1XData;
  58
  59         for (uint8_t EPNum = 1; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  60         {
  61                 Endpoint_SelectEndpoint(EPNum);
  62                 UEIENX  = 0;
  63                 UEINTX  = 0;
  64                 UECFG1X = 0;
  65                 Endpoint_DisableEndpoint();
  66         }
  67
  68         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  69         {
  70                 if (!(UECFG1XTemp[EPNum] & (1 << ALLOC)))
  71                   continue;
  72
  73                 Endpoint_SelectEndpoint(EPNum);
  74                 Endpoint_EnableEndpoint();
  75
  76                 UECFG0X = UECFG0XTemp[EPNum];
  77                 UECFG1X = UECFG1XTemp[EPNum];
  78
  79                 if (!(Endpoint_IsConfigured()))
  80                   return false;
  81         }
  82
  83         Endpoint_SelectEndpoint(Number);
  84         return true;
  85 }
  86
  87 void Endpoint_ClearEndpoints(void)
  88 {
  89         UEINT = 0;
  90
  91         for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
  92         {
  93                 Endpoint_SelectEndpoint(EPNum);
  94                 UEIENX  = 0;
  95                 UEINTX  = 0;
  96                 UECFG1X = 0;
  97                 Endpoint_DisableEndpoint();
  98         }
  99 }
 100
 101 void Endpoint_ClearStatusStage(void)
 102 {
 103         if (USB_ControlRequest.bmRequestType & REQDIR_DEVICETOHOST)
 104         {
 105                 while (!(Endpoint_IsOUTReceived()))
 106                 {
 107                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 108                           return;
 109                 }
 110
 111                 Endpoint_ClearOUT();
 112         }
 113         else
 114         {
 115                 while (!(Endpoint_IsINReady()))
 116                 {
 117                         if (USB_DeviceState == DEVICE_STATE_Unattached)
 118                           return;
 119                 }
 120
 121                 Endpoint_ClearIN();
 122         }
 123 }
 124
 125 #if !defined(CONTROL_ONLY_DEVICE)
 126 uint8_t Endpoint_WaitUntilReady(void)
 127 {
 128         #if (USB_STREAM_TIMEOUT_MS < 0xFF)
 129         uint8_t  TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 130         #else
 131         uint16_t TimeoutMSRem = USB_STREAM_TIMEOUT_MS;
 132         #endif
 133
 134         for (;;)
 135         {
 136                 if (Endpoint_GetEndpointDirection() == ENDPOINT_DIR_IN)
 137                 {
 138                         if (Endpoint_IsINReady())
 139                           return ENDPOINT_READYWAIT_NoError;
 140                 }
 141                 else
 142                 {
 143                         if (Endpoint_IsOUTReceived())
 144                           return ENDPOINT_READYWAIT_NoError;
 145                 }
 146
 147                 if (USB_DeviceState == DEVICE_STATE_Unattached)
 148                   return ENDPOINT_READYWAIT_DeviceDisconnected;
 149                 else if (USB_DeviceState == DEVICE_STATE_Suspended)
 150                   return ENDPOINT_READYWAIT_BusSuspended;
 151                 else if (Endpoint_IsStalled())
 152                   return ENDPOINT_READYWAIT_EndpointStalled;
 153
 154                 if (USB_INT_HasOccurred(USB_INT_SOFI))
 155                 {
 156                         USB_INT_Clear(USB_INT_SOFI);
 157
 158                         if (!(TimeoutMSRem--))
 159                           return ENDPOINT_READYWAIT_Timeout;
 160                 }
 161         }
 162 }
 163 #endif
 164
 165 #endif