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