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_Attached:
  64                         WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
  65
  66                         USB_HostState = HOST_STATE_Attached_WaitForDeviceSettle;
  67                         break;
  68                 case HOST_STATE_Attached_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_Attached_WaitForConnect;
  81                         }
  82                         #else
  83                         USB_HostState = HOST_STATE_Attached_WaitForConnect;
  84                         #endif
  85
  86                         break;
  87                 case HOST_STATE_Attached_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_IsConnected = true;
  97                                 EVENT_USB_Connect();
  98
  99                                 USB_Host_ResumeBus();
 100                                 Pipe_ClearPipes();
 101
 102                                 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Attached_DoReset);
 103                         }
 104
 105                         break;
 106                 case HOST_STATE_Attached_DoReset:
 107                         USB_Host_ResetDevice();
 108
 109                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered);
 110                         break;
 111                 case HOST_STATE_Powered:
 112                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 113                                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 114                                                            PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE);
 115
 116                         if (!(Pipe_IsConfigured()))
 117                         {
 118                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 119                                 SubErrorCode = 0;
 120                                 break;
 121                         }
 122
 123                         USB_HostState = HOST_STATE_Default;
 124                         break;
 125                 case HOST_STATE_Default:
 126                         USB_ControlRequest = (USB_Request_Header_t)
 127                                 {
 128                                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 129                                         .bRequest      = REQ_GetDescriptor,
 130                                         .wValue        = (DTYPE_Device << 8),
 131                                         .wIndex        = 0,
 132                                         .wLength       = 8,
 133                                 };
 134
 135                         uint8_t DataBuffer[8];
 136
 137                         if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
 138                         {
 139                                 ErrorCode = HOST_ENUMERROR_ControlError;
 140                                 break;
 141                         }
 142
 143                         #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
 144                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
 145                         #else
 146                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, bMaxPacketSize0)];
 147                         #endif
 148
 149                         USB_Host_ResetDevice();
 150
 151                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
 152                         break;
 153                 case HOST_STATE_Default_PostReset:
 154                         Pipe_DisablePipe();
 155                         Pipe_DeallocateMemory();
 156                         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 157
 158                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 159                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 160                                            USB_ControlPipeSize, PIPE_BANK_SINGLE);
 161
 162                         if (!(Pipe_IsConfigured()))
 163                         {
 164                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 165                                 SubErrorCode = 0;
 166                                 break;
 167                         }
 168
 169                         USB_ControlRequest = (USB_Request_Header_t)
 170                                 {
 171                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 172                                         .bRequest      = REQ_SetAddress,
 173                                         .wValue        = USB_HOST_DEVICEADDRESS,
 174                                         .wIndex        = 0,
 175                                         .wLength       = 0,
 176                                 };
 177
 178                         if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 179                         {
 180                                 ErrorCode = HOST_ENUMERROR_ControlError;
 181                                 break;
 182                         }
 183
 184                         HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
 185                         break;
 186                 case HOST_STATE_Default_PostAddressSet:
 187                         USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);
 188
 189                         EVENT_USB_DeviceEnumerationComplete();
 190                         USB_HostState = HOST_STATE_Addressed;
 191
 192                         break;
 193         }
 194
 195         if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
 196         {
 197                 EVENT_USB_DeviceEnumerationFailed(ErrorCode, SubErrorCode);
 198
 199                 USB_Host_VBUS_Auto_Off();
 200
 201                 EVENT_USB_DeviceUnattached();
 202
 203                 if (USB_IsConnected)
 204                   EVENT_USB_Disconnect();
 205
 206                 USB_ResetInterface();
 207         }
 208 }
 209
 210 uint8_t USB_Host_WaitMS(uint8_t MS)
 211 {
 212         bool    BusSuspended = USB_Host_IsBusSuspended();
 213         uint8_t ErrorCode    = HOST_WAITERROR_Successful;
 214
 215         USB_Host_ResumeBus();
 216
 217         while (MS)
 218         {
 219                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 220                 {
 221                         USB_INT_Clear(USB_INT_HSOFI);
 222                         MS--;
 223                 }
 224
 225                 if ((USB_IsConnected == false) || (USB_CurrentMode == USB_MODE_DEVICE))
 226                 {
 227                         ErrorCode = HOST_WAITERROR_DeviceDisconnect;
 228
 229                         break;
 230                 }
 231
 232                 if (Pipe_IsError() == true)
 233                 {
 234                         Pipe_ClearError();
 235                         ErrorCode = HOST_WAITERROR_PipeError;
 236
 237                         break;
 238                 }
 239
 240                 if (Pipe_IsStalled() == true)
 241                 {
 242                         Pipe_ClearStall();
 243                         ErrorCode = HOST_WAITERROR_SetupStalled;
 244
 245                         break;
 246                 }
 247         }
 248
 249         if (BusSuspended)
 250           USB_Host_SuspendBus();
 251
 252         return ErrorCode;
 253 }
 254
 255 static void USB_Host_ResetDevice(void)
 256 {
 257         bool BusSuspended = USB_Host_IsBusSuspended();
 258
 259         USB_INT_Disable(USB_INT_DDISCI);
 260
 261         USB_Host_ResetBus();
 262         while (!(USB_Host_IsBusResetComplete()));
 263
 264         USB_Host_ResumeBus();
 265
 266         USB_INT_Clear(USB_INT_HSOFI);
 267
 268         for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
 269         {
 270                 /* Workaround for powerless-pull-up devices. After a USB bus reset,
 271                    all disconnection interrupts are suppressed while a USB frame is
 272                    looked for - if it is found within 10ms, the device is still
 273                    present.                                                        */
 274
 275                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 276                 {
 277                         USB_INT_Clear(USB_INT_HSOFI);
 278                         USB_INT_Clear(USB_INT_DDISCI);
 279                         break;
 280                 }
 281
 282                 _delay_ms(1);
 283         }
 284
 285         if (BusSuspended)
 286           USB_Host_SuspendBus();
 287
 288         USB_INT_Enable(USB_INT_DDISCI);
 289 }
 290
 291 uint8_t USB_Host_SetDeviceConfiguration(uint8_t ConfigNumber)
 292 {
 293         USB_ControlRequest = (USB_Request_Header_t)
 294                 {
 295                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 296                         .bRequest      = REQ_SetConfiguration,
 297                         .wValue        = ConfigNumber,
 298                         .wIndex        = 0,
 299                         .wLength       = 0,
 300                 };
 301
 302         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 303
 304         return USB_Host_SendControlRequest(NULL);
 305 }
 306
 307 uint8_t USB_Host_GetDeviceDescriptor(void* DeviceDescriptorPtr)
 308 {
 309         USB_ControlRequest = (USB_Request_Header_t)
 310                 {
 311                         bmRequestType: (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 312                         bRequest:      REQ_GetDescriptor,
 313                         wValue:        (DTYPE_Device << 8),
 314                         wIndex:        0,
 315                         wLength:       sizeof(USB_Descriptor_Device_t),
 316                 };
 317
 318         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 319
 320         return USB_Host_SendControlRequest(DeviceDescriptorPtr);
 321 }
 322
 323 uint8_t USB_Host_ClearPipeStall(uint8_t EndpointNum)
 324 {
 325         if (Pipe_GetPipeToken() == PIPE_TOKEN_IN)
 326           EndpointNum |= (1 << 7);
 327
 328         USB_ControlRequest = (USB_Request_Header_t)
 329                 {
 330                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_ENDPOINT),
 331                         .bRequest      = REQ_ClearFeature,
 332                         .wValue        = FEATURE_ENDPOINT_HALT,
 333                         .wIndex        = EndpointNum,
 334                         .wLength       = 0,
 335                 };
 336
 337         Pipe_SelectPipe(PIPE_CONTROLPIPE);
 338
 339         return USB_Host_SendControlRequest(NULL);
 340 }
 341
 342 #endif