LUFA/Drivers/USB/LowLevel/Host.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 #include "../HighLevel/USBMode.h"
  32
  33 #if defined(USB_CAN_BE_HOST)
  34
  35 #define  INCLUDE_FROM_HOST_C
  36 #include "Host.h"
  37
  38 void USB_Host_ProcessNextHostState(void)
  39 {
  40         uint8_t ErrorCode    = HOST_ENUMERROR_NoError;
  41         uint8_t SubErrorCode = HOST_ENUMERROR_NoError;
  42
  43         static uint16_t WaitMSRemaining;
  44         static uint8_t  PostWaitState;
  45
  46         switch (USB_HostState)
  47         {
  48                 case HOST_STATE_WaitForDevice:
  49                         if (WaitMSRemaining)
  50                         {
  51                                 if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
  52                                 {
  53                                         USB_HostState = PostWaitState;
  54                                         ErrorCode     = HOST_ENUMERROR_WaitStage;
  55                                         break;
  56                                 }
  57
  58                                 if (!(--WaitMSRemaining))
  59                                   USB_HostState = PostWaitState;
  60                         }
  61
  62                         break;
  63                 case HOST_STATE_Powered:
  64                         WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
  65
  66                         USB_HostState = HOST_STATE_Powered_WaitForDeviceSettle;
  67                         break;
  68                 case HOST_STATE_Powered_WaitForDeviceSettle:
  69                         #if HOST_DEVICE_SETTLE_DELAY_MS > 0
  70                         _delay_ms(1);
  71
  72                         if (!(WaitMSRemaining--))
  73                         {
  74                                 USB_Host_VBUS_Manual_Off();
  75
  76                                 USB_OTGPAD_On();
  77                                 USB_Host_VBUS_Auto_Enable();
  78                                 USB_Host_VBUS_Auto_On();
  79
  80                                 USB_HostState = HOST_STATE_Powered_WaitForConnect;
  81                         }
  82                         #else
  83                         USB_HostState = HOST_STATE_Powered_WaitForConnect;
  84                         #endif
  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                                 EVENT_USB_Connect();
  97
  98                                 USB_Host_ResumeBus();
  99                                 Pipe_ClearPipes();
 100
 101                                 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Powered_DoReset);
 102                         }
 103
 104                         break;
 105                 case HOST_STATE_Powered_DoReset:
 106                         USB_Host_ResetDevice();
 107
 108                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered_ConfigPipe);
 109                         break;
 110                 case HOST_STATE_Powered_ConfigPipe:
 111                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 112                                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 113                                                            PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE);
 114
 115                         if (!(Pipe_IsConfigured()))
 116                         {
 117                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 118                                 SubErrorCode = 0;
 119                                 break;
 120                         }
 121
 122                         USB_HostState = HOST_STATE_Default;
 123                         break;
 124                 case HOST_STATE_Default:
 125                         USB_ControlRequest = (USB_Request_Header_t)
 126                                 {
 127                                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 128                                         .bRequest      = REQ_GetDescriptor,
 129                                         .wValue        = (DTYPE_Device << 8),
 130                                         .wIndex        = 0,
 131                                         .wLength       = 8,
 132                                 };
 133
 134                         uint8_t DataBuffer[8];
 135
 136                         if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
 137                         {
 138                                 ErrorCode = HOST_ENUMERROR_ControlError;
 139                                 break;
 140                         }
 141
 142                         #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
 143                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
 144                         #else
 145                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, bMaxPacketSize0)];
 146                         #endif
 147
 148                         USB_Host_ResetDevice();
 149
 150                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
 151                         break;
 152                 case HOST_STATE_Default_PostReset:
 153                         Pipe_DisablePipe();
 154                         Pipe_DeallocateMemory();
 155                         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 156
 157                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 158                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 159                                            USB_ControlPipeSize, PIPE_BANK_SINGLE);
 160
 161                         if (!(Pipe_IsConfigured()))
 162                         {
 163                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 164                                 SubErrorCode = 0;
 165                                 break;
 166                         }
 167
 168                         USB_ControlRequest = (USB_Request_Header_t)
 169                                 {
 170                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 171                                         .bRequest      = REQ_SetAddress,
 172                                         .wValue        = USB_HOST_DEVICEADDRESS,
 173                                         .wIndex        = 0,
 174                                         .wLength       = 0,
 175                                 };
 176
 177                         if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 178                         {
 179                                 ErrorCode = HOST_ENUMERROR_ControlError;
 180                                 break;
 181                         }
 182
 183                         HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
 184                         break;
 185                 case HOST_STATE_Default_PostAddressSet:
 186                         USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);
 187
 188                         EVENT_USB_DeviceEnumerationComplete();
 189                         USB_HostState = HOST_STATE_Addressed;
 190                         break;
 191         }
 192
 193         if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
 194         {
 195                 EVENT_USB_DeviceEnumerationFailed(ErrorCode, SubErrorCode);
 196
 197                 USB_Host_VBUS_Auto_Off();
 198
 199                 EVENT_USB_DeviceUnattached();
 200                 EVENT_USB_Disconnect();
 201
 202                 USB_ResetInterface();
 203         }
 204 }
 205
 206 uint8_t USB_Host_WaitMS(uint8_t MS)
 207 {
 208         bool    BusSuspended = USB_Host_IsBusSuspended();
 209         uint8_t ErrorCode    = HOST_WAITERROR_Successful;
 210
 211         USB_Host_ResumeBus();
 212
 213         while (MS)
 214         {
 215                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 216                 {
 217                         USB_INT_Clear(USB_INT_HSOFI);
 218                         MS--;
 219                 }
 220
 221                 if ((USB_HostState == HOST_STATE_Unattached) || (USB_CurrentMode == USB_MODE_DEVICE))
 222                 {
 223                         ErrorCode = HOST_WAITERROR_DeviceDisconnect;
 224
 225                         break;
 226                 }
 227
 228                 if (Pipe_IsError() == true)
 229                 {
 230                         Pipe_ClearError();
 231                         ErrorCode = HOST_WAITERROR_PipeError;
 232
 233                         break;
 234                 }
 235
 236                 if (Pipe_IsStalled() == true)
 237                 {
 238                         Pipe_ClearStall();
 239                         ErrorCode = HOST_WAITERROR_SetupStalled;
 240
 241                         break;
 242                 }
 243         }
 244
 245         if (BusSuspended)
 246           USB_Host_SuspendBus();
 247
 248         return ErrorCode;
 249 }
 250
 251 static void USB_Host_ResetDevice(void)
 252 {
 253         bool BusSuspended = USB_Host_IsBusSuspended();
 254
 255         USB_INT_Disable(USB_INT_DDISCI);
 256
 257         USB_Host_ResetBus();
 258         while (!(USB_Host_IsBusResetComplete()));
 259
 260         USB_Host_ResumeBus();
 261
 262         USB_INT_Clear(USB_INT_HSOFI);
 263
 264         for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
 265         {
 266                 /* Workaround for powerless-pull-up devices. After a USB bus reset,
 267                    all disconnection interrupts are suppressed while a USB frame is
 268                    looked for - if it is found within 10ms, the device is still
 269                    present.                                                        */
 270
 271                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 272                 {
 273                         USB_INT_Clear(USB_INT_HSOFI);
 274                         USB_INT_Clear(USB_INT_DDISCI);
 275                         break;
 276                 }
 277
 278                 _delay_ms(1);
 279         }
 280
 281         if (BusSuspended)
 282           USB_Host_SuspendBus();
 283
 284         USB_INT_Enable(USB_INT_DDISCI);
 285 }
 286
 287 uint8_t USB_Host_SetDeviceConfiguration(const uint8_t ConfigNumber)
 288 {
 289         USB_ControlRequest = (USB_Request_Header_t)
 290                 {
 291                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 292                         .bRequest      = REQ_SetConfiguration,
 293                         .wValue        = ConfigNumber,
 294                         .wIndex        = 0,
 295                         .wLength       = 0,
 296                 };
 297
 298         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 299
 300         return USB_Host_SendControlRequest(NULL);
 301 }
 302
 303 uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr)
 304 {
 305         USB_ControlRequest = (USB_Request_Header_t)
 306                 {
 307                         bmRequestType: (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 308                         bRequest:      REQ_GetDescriptor,
 309                         wValue:        (DTYPE_Device << 8),
 310                         wIndex:        0,
 311                         wLength:       sizeof(USB_Descriptor_Device_t),
 312                 };
 313
 314         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 315
 316         return USB_Host_SendControlRequest(DeviceDescriptorPtr);
 317 }
 318
 319 uint8_t USB_Host_ClearPipeStall(uint8_t EndpointNum)
 320 {
 321         if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 322           EndpointNum |= (1 << 7);
 323
 324         USB_ControlRequest = (USB_Request_Header_t)
 325                 {
 326                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_ENDPOINT),
 327                         .bRequest      = REQ_ClearFeature,
 328                         .wValue        = FEATURE_ENDPOINT_HALT,
 329                         .wIndex        = EndpointNum,
 330                         .wLength       = 0,
 331                 };
 332
 333         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 334
 335         return USB_Host_SendControlRequest(NULL);
 336 }
 337
 338 #endif