LUFA/Drivers/USB/LowLevel/USBInterrupt.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 "USBInterrupt.h"
  33
  34 void USB_INT_DisableAllInterrupts(void)
  35 {
  36         #if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  37         USBCON &= ~((1 << VBUSTE) | (1 << IDTE));
  38         #elif defined(USB_SERIES_4_AVR)
  39         USBCON &= ~(1 << VBUSTE);
  40         #endif
  41
  42         #if defined(USB_CAN_BE_BOTH)
  43         OTGIEN  = 0;
  44         #endif
  45
  46         #if defined(USB_CAN_BE_HOST)
  47         UHIEN   = 0;
  48         #endif
  49
  50         #if defined(USB_CAN_BE_DEVICE)
  51         UDIEN   = 0;
  52         #endif
  53 }
  54
  55 void USB_INT_ClearAllInterrupts(void)
  56 {
  57         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  58         USBINT  = 0;
  59         #endif
  60
  61         #if defined(USB_CAN_BE_BOTH)
  62         OTGINT  = 0;
  63         #endif
  64
  65         #if defined(USB_CAN_BE_HOST)
  66         UHINT   = 0;
  67         #endif
  68
  69         #if defined(USB_CAN_BE_DEVICE)
  70         UDINT   = 0;
  71         #endif
  72 }
  73
  74 ISR(USB_GEN_vect, ISR_BLOCK)
  75 {
  76         #if defined(USB_CAN_BE_DEVICE)
  77         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  78         if (USB_INT_HasOccurred(USB_INT_VBUS) && USB_INT_IsEnabled(USB_INT_VBUS))
  79         {
  80                 USB_INT_Clear(USB_INT_VBUS);
  81
  82                 if (USB_VBUS_GetStatus())
  83                 {
  84                         USB_DeviceState = DEVICE_STATE_Powered;
  85                         EVENT_USB_Device_Connect();
  86                 }
  87                 else
  88                 {
  89                         USB_DeviceState = DEVICE_STATE_Unattached;
  90                         EVENT_USB_Device_Disconnect();
  91                 }
  92         }
  93         #endif
  94
  95         if (USB_INT_HasOccurred(USB_INT_SUSPI) && USB_INT_IsEnabled(USB_INT_SUSPI))
  96         {
  97                 USB_INT_Clear(USB_INT_SUSPI);
  98
  99                 USB_INT_Disable(USB_INT_SUSPI);
 100                 USB_INT_Enable(USB_INT_WAKEUPI);
 101
 102                 USB_CLK_Freeze();
 103
 104                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 105                   USB_PLL_Off();
 106
 107                 #if defined(USB_SERIES_2_AVR) && !defined(NO_LIMITED_CONTROLLER_CONNECT)
 108                 USB_DeviceState = DEVICE_STATE_Unattached;
 109                 EVENT_USB_Device_Disconnect();
 110                 #else
 111                 USB_DeviceState = DEVICE_STATE_Suspended;
 112                 EVENT_USB_Device_Suspend();
 113                 #endif
 114         }
 115
 116         if (USB_INT_HasOccurred(USB_INT_WAKEUPI) && USB_INT_IsEnabled(USB_INT_WAKEUPI))
 117         {
 118                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 119                 {
 120                         USB_PLL_On();
 121                         while (!(USB_PLL_IsReady()));
 122                 }
 123
 124                 USB_CLK_Unfreeze();
 125
 126                 USB_INT_Clear(USB_INT_WAKEUPI);
 127
 128                 USB_INT_Disable(USB_INT_WAKEUPI);
 129                 USB_INT_Enable(USB_INT_SUSPI);
 130
 131                 if (USB_ConfigurationNumber)
 132                   USB_DeviceState = DEVICE_STATE_Configured;
 133                 else
 134                   USB_DeviceState = (USB_Device_IsAddressSet()) ? DEVICE_STATE_Configured : DEVICE_STATE_Powered;
 135
 136                 #if defined(USB_SERIES_2_AVR) && !defined(NO_LIMITED_CONTROLLER_CONNECT)
 137                 EVENT_USB_Device_Connect();
 138                 #else
 139                 EVENT_USB_Device_WakeUp();
 140                 #endif
 141         }
 142
 143         if (USB_INT_HasOccurred(USB_INT_EORSTI) && USB_INT_IsEnabled(USB_INT_EORSTI))
 144         {
 145                 USB_INT_Clear(USB_INT_EORSTI);
 146
 147                 USB_DeviceState         = DEVICE_STATE_Default;
 148                 USB_ConfigurationNumber = 0;
 149
 150                 USB_INT_Clear(USB_INT_SUSPI);
 151                 USB_INT_Disable(USB_INT_SUSPI);
 152                 USB_INT_Enable(USB_INT_WAKEUPI);
 153
 154                 Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 155                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 156                                            ENDPOINT_BANK_SINGLE);
 157
 158                 #if defined(INTERRUPT_CONTROL_ENDPOINT)
 159                 USB_INT_Enable(USB_INT_RXSTPI);
 160                 #endif
 161
 162                 EVENT_USB_Device_Reset();
 163         }
 164
 165         #if !defined(NO_SOF_EVENTS)
 166         if (USB_INT_HasOccurred(USB_INT_SOFI) && USB_INT_IsEnabled(USB_INT_SOFI))
 167         {
 168                 USB_INT_Clear(USB_INT_SOFI);
 169
 170                 EVENT_USB_Device_StartOfFrame();
 171         }
 172         #endif
 173         #endif
 174
 175         #if defined(USB_CAN_BE_HOST)
 176         if (USB_INT_HasOccurred(USB_INT_DDISCI) && USB_INT_IsEnabled(USB_INT_DDISCI))
 177         {
 178                 USB_INT_Clear(USB_INT_DDISCI);
 179                 USB_INT_Clear(USB_INT_DCONNI);
 180                 USB_INT_Disable(USB_INT_DDISCI);
 181
 182                 EVENT_USB_Host_DeviceUnattached();
 183
 184                 USB_ResetInterface();
 185         }
 186
 187         if (USB_INT_HasOccurred(USB_INT_VBERRI) && USB_INT_IsEnabled(USB_INT_VBERRI))
 188         {
 189                 USB_INT_Clear(USB_INT_VBERRI);
 190
 191                 USB_Host_VBUS_Manual_Off();
 192                 USB_Host_VBUS_Auto_Off();
 193
 194                 EVENT_USB_Host_HostError(HOST_ERROR_VBusVoltageDip);
 195                 EVENT_USB_Host_DeviceUnattached();
 196
 197                 USB_HostState = HOST_STATE_Unattached;
 198         }
 199
 200         if (USB_INT_HasOccurred(USB_INT_SRPI) && USB_INT_IsEnabled(USB_INT_SRPI))
 201         {
 202                 USB_INT_Clear(USB_INT_SRPI);
 203                 USB_INT_Disable(USB_INT_SRPI);
 204
 205                 EVENT_USB_Host_DeviceAttached();
 206
 207                 USB_INT_Enable(USB_INT_DDISCI);
 208
 209                 USB_HostState = HOST_STATE_Powered;
 210         }
 211
 212         if (USB_INT_HasOccurred(USB_INT_BCERRI) && USB_INT_IsEnabled(USB_INT_BCERRI))
 213         {
 214                 USB_INT_Clear(USB_INT_BCERRI);
 215
 216                 EVENT_USB_Host_DeviceEnumerationFailed(HOST_ENUMERROR_NoDeviceDetected, 0);
 217                 EVENT_USB_Host_DeviceUnattached();
 218
 219                 USB_ResetInterface();
 220         }
 221
 222         #if !defined(NO_SOF_EVENTS)
 223         if (USB_INT_HasOccurred(USB_INT_HSOFI) && USB_INT_IsEnabled(USB_INT_HSOFI))
 224         {
 225                 USB_INT_Clear(USB_INT_HSOFI);
 226
 227                 EVENT_USB_Host_StartOfFrame();
 228         }
 229         #endif
 230         #endif
 231
 232         #if defined(USB_CAN_BE_BOTH)
 233         if (USB_INT_HasOccurred(USB_INT_IDTI) && USB_INT_IsEnabled(USB_INT_IDTI))
 234         {
 235                 USB_INT_Clear(USB_INT_IDTI);
 236
 237                 if (USB_DeviceState != DEVICE_STATE_Unattached)
 238                   EVENT_USB_Device_Disconnect();
 239
 240                 if (USB_HostState != HOST_STATE_Unattached)
 241                   EVENT_USB_Host_DeviceUnattached();
 242
 243                 USB_CurrentMode = USB_GetUSBModeFromUID();
 244                 USB_ResetInterface();
 245
 246                 EVENT_USB_UIDChange();
 247         }
 248         #endif
 249 }
 250
 251 #if defined(INTERRUPT_CONTROL_ENDPOINT) && defined(USB_CAN_BE_DEVICE)
 252 ISR(USB_COM_vect, ISR_BLOCK)
 253 {
 254         uint8_t PrevSelectedEndpoint = Endpoint_GetCurrentEndpoint();
 255
 256         Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
 257         USB_INT_Disable(USB_INT_RXSTPI);
 258
 259         NONATOMIC_BLOCK(NONATOMIC_FORCEOFF)
 260         {
 261                 USB_Device_ProcessControlRequest();
 262         }
 263
 264         Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
 265         USB_INT_Enable(USB_INT_RXSTPI);
 266         Endpoint_SelectEndpoint(PrevSelectedEndpoint);
 267 }
 268 #endif
 269