LUFA/Drivers/USB/Core/UC3/Host_UC3.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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 "../USBMode.h"
  33
  34 #if defined(USB_CAN_BE_HOST)
  35
  36 #define  __INCLUDE_FROM_HOST_C
  37 #include "../Host.h"
  38
  39 void USB_Host_ProcessNextHostState(void)
  40 {
  41         uint8_t ErrorCode    = HOST_ENUMERROR_NoError;
  42         uint8_t SubErrorCode = HOST_ENUMERROR_NoError;
  43
  44         static uint16_t WaitMSRemaining;
  45         static uint8_t  PostWaitState;
  46
  47         switch (USB_HostState)
  48         {
  49                 case HOST_STATE_WaitForDevice:
  50                         if (WaitMSRemaining)
  51                         {
  52                                 if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  53                                 {
  54                                         USB_HostState = PostWaitState;
  55                                         ErrorCode     = HOST_ENUMERROR_WaitStage;
  56                                         break;
  57                                 }
  58
  59                                 if (!(--WaitMSRemaining))
  60                                   USB_HostState = PostWaitState;
  61                         }
  62
  63                         break;
  64                 case HOST_STATE_Powered:
  65                         WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
  66
  67                         USB_HostState = HOST_STATE_Powered_WaitForDeviceSettle;
  68                         break;
  69                 case HOST_STATE_Powered_WaitForDeviceSettle:
  70                         if (WaitMSRemaining--)
  71                         {
  72                                 Delay_MS(1);
  73                                 break;
  74                         }
  75                         else
  76                         {
  77                                 USB_Host_VBUS_Manual_Off();
  78
  79                                 USB_OTGPAD_On();
  80                                 USB_Host_VBUS_Auto_Enable();
  81                                 USB_Host_VBUS_Auto_On();
  82
  83                                 USB_HostState = HOST_STATE_Powered_WaitForConnect;
  84                         }
  85
  86                         break;
  87                 case HOST_STATE_Powered_WaitForConnect:
  88                         if (USB_INT_HasOccurred(USB_INT_DCONNI))
  89                         {
  90                                 USB_INT_Clear(USB_INT_DCONNI);
  91                                 USB_INT_Clear(USB_INT_DDISCI);
  92
  93                                 USB_INT_Clear(USB_INT_VBERRI);
  94                                 USB_INT_Enable(USB_INT_VBERRI);
  95
  96                                 USB_Host_ResumeBus();
  97                                 Pipe_ClearPipes();
  98
  99                                 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Powered_DoReset);
 100                         }
 101
 102                         break;
 103                 case HOST_STATE_Powered_DoReset:
 104                         USB_Host_ResetDevice();
 105
 106                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered_ConfigPipe);
 107                         break;
 108                 case HOST_STATE_Powered_ConfigPipe:
 109                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 110                                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 111                                                            PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE);
 112
 113                         if (!(Pipe_IsConfigured()))
 114                         {
 115                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 116                                 SubErrorCode = 0;
 117                                 break;
 118                         }
 119
 120                         USB_HostState = HOST_STATE_Default;
 121                         break;
 122                 case HOST_STATE_Default:
 123                         USB_ControlRequest = (USB_Request_Header_t)
 124                                 {
 125                                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 126                                         .bRequest      = REQ_GetDescriptor,
 127                                         .wValue        = (DTYPE_Device << 8),
 128                                         .wIndex        = 0,
 129                                         .wLength       = 8,
 130                                 };
 131
 132                         uint8_t DataBuffer[8];
 133
 134                         if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
 135                         {
 136                                 ErrorCode = HOST_ENUMERROR_ControlError;
 137                                 break;
 138                         }
 139
 140                         USB_Host_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
 141
 142                         USB_Host_ResetDevice();
 143
 144                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
 145                         break;
 146                 case HOST_STATE_Default_PostReset:
 147                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 148                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 149                                            USB_Host_ControlPipeSize, PIPE_BANK_SINGLE);
 150
 151                         if (!(Pipe_IsConfigured()))
 152                         {
 153                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 154                                 SubErrorCode = 0;
 155                                 break;
 156                         }
 157
 158                         USB_ControlRequest = (USB_Request_Header_t)
 159                                 {
 160                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 161                                         .bRequest      = REQ_SetAddress,
 162                                         .wValue        = USB_HOST_DEVICEADDRESS,
 163                                         .wIndex        = 0,
 164                                         .wLength       = 0,
 165                                 };
 166
 167                         if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 168                         {
 169                                 ErrorCode = HOST_ENUMERROR_ControlError;
 170                                 break;
 171                         }
 172
 173                         HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
 174                         break;
 175                 case HOST_STATE_Default_PostAddressSet:
 176                         USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);
 177
 178                         USB_HostState = HOST_STATE_Addressed;
 179
 180                         EVENT_USB_Host_DeviceEnumerationComplete();
 181                         break;
 182         }
 183
 184         if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
 185         {
 186                 EVENT_USB_Host_DeviceEnumerationFailed(ErrorCode, SubErrorCode);
 187
 188                 USB_Host_VBUS_Auto_Off();
 189
 190                 EVENT_USB_Host_DeviceUnattached();
 191
 192                 USB_ResetInterface();
 193         }
 194 }
 195
 196 uint8_t USB_Host_WaitMS(uint8_t MS)
 197 {
 198         bool    BusSuspended = USB_Host_IsBusSuspended();
 199         uint8_t ErrorCode    = HOST_WAITERROR_Successful;
 200         bool    HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
 201
 202         USB_INT_Disable(USB_INT_HSOFI);
 203         USB_INT_Clear(USB_INT_HSOFI);
 204
 205         USB_Host_ResumeBus();
 206
 207         while (MS)
 208         {
 209                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 210                 {
 211                         USB_INT_Clear(USB_INT_HSOFI);
 212                         MS--;
 213                 }
 214
 215                 if ((USB_HostState == HOST_STATE_Unattached) || (USB_CurrentMode != USB_MODE_Host))
 216                 {
 217                         ErrorCode = HOST_WAITERROR_DeviceDisconnect;
 218
 219                         break;
 220                 }
 221
 222                 if (Pipe_IsError() == true)
 223                 {
 224                         Pipe_ClearError();
 225                         ErrorCode = HOST_WAITERROR_PipeError;
 226
 227                         break;
 228                 }
 229
 230                 if (Pipe_IsStalled() == true)
 231                 {
 232                         Pipe_ClearStall();
 233                         ErrorCode = HOST_WAITERROR_SetupStalled;
 234
 235                         break;
 236                 }
 237         }
 238
 239         if (BusSuspended)
 240           USB_Host_SuspendBus();
 241
 242         if (HSOFIEnabled)
 243           USB_INT_Enable(USB_INT_HSOFI);
 244
 245         return ErrorCode;
 246 }
 247
 248 static void USB_Host_ResetDevice(void)
 249 {
 250         bool BusSuspended = USB_Host_IsBusSuspended();
 251
 252         USB_INT_Disable(USB_INT_DDISCI);
 253
 254         USB_Host_ResetBus();
 255         while (!(USB_Host_IsBusResetComplete()));
 256         USB_Host_ResumeBus();
 257
 258         USB_Host_ConfigurationNumber = 0;
 259
 260         bool HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
 261
 262         USB_INT_Disable(USB_INT_HSOFI);
 263         USB_INT_Clear(USB_INT_HSOFI);
 264
 265         for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
 266         {
 267                 /* Workaround for powerless-pull-up devices. After a USB bus reset,
 268                    all disconnection interrupts are suppressed while a USB frame is
 269                    looked for - if it is found within 10ms, the device is still
 270                    present.                                                        */
 271
 272                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 273                 {
 274                         USB_INT_Clear(USB_INT_HSOFI);
 275                         USB_INT_Clear(USB_INT_DDISCI);
 276                         break;
 277                 }
 278
 279                 Delay_MS(1);
 280         }
 281
 282         if (HSOFIEnabled)
 283           USB_INT_Enable(USB_INT_HSOFI);
 284
 285         if (BusSuspended)
 286           USB_Host_SuspendBus();
 287
 288         USB_INT_Enable(USB_INT_DDISCI);
 289 }
 290
 291 #endif
 292