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.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 "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 << OTGPADE) | (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_SUSPEND) && USB_INT_IsEnabled(USB_INT_SUSPEND))
  96         {
  97                 USB_INT_Clear(USB_INT_SUSPEND);
  98
  99                 USB_INT_Disable(USB_INT_SUSPEND);
 100                 USB_INT_Enable(USB_INT_WAKEUP);
 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_WAKEUP) && USB_INT_IsEnabled(USB_INT_WAKEUP))
 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_WAKEUP);
 127
 128                 USB_INT_Disable(USB_INT_WAKEUP);
 129                 USB_INT_Enable(USB_INT_SUSPEND);
 130
 131                 #if defined(USB_SERIES_2_AVR) && !defined(NO_LIMITED_CONTROLLER_CONNECT)
 132                 USB_DeviceState = (USB_ConfigurationNumber) ? DEVICE_STATE_Configured : DEVICE_STATE_Powered;
 133                 EVENT_USB_Device_Connect();
 134                 #else
 135                 USB_DeviceState = (USB_ConfigurationNumber) ? DEVICE_STATE_Configured : DEVICE_STATE_Addressed;
 136                 EVENT_USB_Device_WakeUp();
 137                 #endif
 138         }
 139
 140         if (USB_INT_HasOccurred(USB_INT_EORSTI) && USB_INT_IsEnabled(USB_INT_EORSTI))
 141         {
 142                 USB_INT_Clear(USB_INT_EORSTI);
 143
 144                 USB_DeviceState         = DEVICE_STATE_Default;
 145                 USB_ConfigurationNumber = 0;
 146
 147                 USB_INT_Clear(USB_INT_SUSPEND);
 148                 USB_INT_Disable(USB_INT_SUSPEND);
 149                 USB_INT_Enable(USB_INT_WAKEUP);
 150
 151                 Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 152                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 153                                            ENDPOINT_BANK_SINGLE);
 154
 155                 #if defined(INTERRUPT_CONTROL_ENDPOINT)
 156                 USB_INT_Enable(USB_INT_RXSTPI);
 157                 #endif
 158
 159                 EVENT_USB_Device_Reset();
 160         }
 161
 162         if (USB_INT_HasOccurred(USB_INT_SOFI) && USB_INT_IsEnabled(USB_INT_SOFI))
 163         {
 164                 USB_INT_Clear(USB_INT_SOFI);
 165
 166                 EVENT_USB_Device_StartOfFrame();
 167         }
 168         #endif
 169
 170         #if defined(USB_CAN_BE_HOST)
 171         bool MustResetInterface = false;
 172
 173         if (USB_INT_HasOccurred(USB_INT_DDISCI) && USB_INT_IsEnabled(USB_INT_DDISCI))
 174         {
 175                 USB_INT_Clear(USB_INT_DDISCI);
 176                 USB_INT_Clear(USB_INT_DCONNI);
 177                 USB_INT_Disable(USB_INT_DDISCI);
 178
 179                 EVENT_USB_Host_DeviceUnattached();
 180
 181                 MustResetInterface = true;
 182         }
 183
 184         if (USB_INT_HasOccurred(USB_INT_VBERRI) && USB_INT_IsEnabled(USB_INT_VBERRI))
 185         {
 186                 USB_INT_Clear(USB_INT_VBERRI);
 187
 188                 USB_Host_VBUS_Manual_Off();
 189                 USB_Host_VBUS_Auto_Off();
 190
 191                 EVENT_USB_Host_HostError(HOST_ERROR_VBusVoltageDip);
 192                 EVENT_USB_Host_DeviceUnattached();
 193
 194                 USB_HostState = HOST_STATE_Unattached;
 195         }
 196
 197         if (USB_INT_HasOccurred(USB_INT_SRPI) && USB_INT_IsEnabled(USB_INT_SRPI))
 198         {
 199                 USB_INT_Clear(USB_INT_SRPI);
 200                 USB_INT_Disable(USB_INT_SRPI);
 201
 202                 EVENT_USB_Host_DeviceAttached();
 203
 204                 USB_INT_Enable(USB_INT_DDISCI);
 205
 206                 USB_HostState = HOST_STATE_Powered;
 207         }
 208
 209         if (USB_INT_HasOccurred(USB_INT_BCERRI) && USB_INT_IsEnabled(USB_INT_BCERRI))
 210         {
 211                 USB_INT_Clear(USB_INT_BCERRI);
 212
 213                 EVENT_USB_Host_DeviceEnumerationFailed(HOST_ENUMERROR_NoDeviceDetected, 0);
 214                 EVENT_USB_Host_DeviceUnattached();
 215
 216                 MustResetInterface = true;
 217         }
 218
 219         if (USB_INT_HasOccurred(USB_INT_HSOFI) && USB_INT_IsEnabled(USB_INT_HSOFI))
 220         {
 221                 USB_INT_Clear(USB_INT_HSOFI);
 222
 223                 EVENT_USB_Host_StartOfFrame();
 224         }
 225         #endif
 226
 227         #if defined(USB_CAN_BE_BOTH)
 228         if (USB_INT_HasOccurred(USB_INT_IDTI) && USB_INT_IsEnabled(USB_INT_IDTI))
 229         {
 230                 USB_INT_Clear(USB_INT_IDTI);
 231
 232                 if (USB_DeviceState != DEVICE_STATE_Unattached)
 233                   EVENT_USB_Device_Disconnect();
 234
 235                 if (USB_HostState != HOST_STATE_Unattached)
 236                   EVENT_USB_Host_DeviceUnattached();
 237
 238                 USB_CurrentMode = USB_GetUSBModeFromUID();
 239                 EVENT_USB_UIDChange();
 240
 241                 MustResetInterface = true;
 242         }
 243
 244         if (MustResetInterface)
 245           USB_ResetInterface();
 246         #endif
 247 }
 248
 249 #if defined(INTERRUPT_CONTROL_ENDPOINT) && defined(USB_CAN_BE_DEVICE)
 250 ISR(USB_COM_vect, ISR_BLOCK)
 251 {
 252         uint8_t PrevSelectedEndpoint = Endpoint_GetCurrentEndpoint();
 253
 254         Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
 255         USB_INT_Disable(USB_INT_RXSTPI);
 256
 257         NONATOMIC_BLOCK(NONATOMIC_FORCEOFF)
 258         {
 259                 USB_Device_ProcessControlRequest();
 260         }
 261
 262         Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
 263         USB_INT_Enable(USB_INT_RXSTPI);
 264         Endpoint_SelectEndpoint(PrevSelectedEndpoint);
 265 }
 266 #endif