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                         _delay_ms(1);
  70
  71                         if (!(WaitMSRemaining--))
  72                         {
  73                                 USB_Host_VBUS_Manual_Off();
  74
  75                                 USB_OTGPAD_On();
  76                                 USB_Host_VBUS_Auto_Enable();
  77                                 USB_Host_VBUS_Auto_On();
  78
  79                                 USB_HostState = HOST_STATE_Attached_WaitForConnect;
  80                         }
  81
  82                         break;
  83                 case HOST_STATE_Attached_WaitForConnect:
  84                         if (USB_INT_HasOccurred(USB_INT_DCONNI))
  85                         {
  86                                 USB_INT_Clear(USB_INT_DCONNI);
  87                                 USB_INT_Clear(USB_INT_DDISCI);
  88
  89                                 USB_INT_Clear(USB_INT_VBERRI);
  90                                 USB_INT_Enable(USB_INT_VBERRI);
  91
  92                                 USB_IsConnected = true;
  93                                 EVENT_USB_Connect();
  94
  95                                 USB_Host_ResumeBus();
  96                                 Pipe_ClearPipes();
  97
  98                                 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Attached_DoReset);
  99                         }
 100
 101                         break;
 102                 case HOST_STATE_Attached_DoReset:
 103                         USB_Host_ResetDevice();
 104
 105                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered);
 106                         break;
 107                 case HOST_STATE_Powered:
 108                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 109                                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 110                                                            PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE);
 111
 112                         if (!(Pipe_IsConfigured()))
 113                         {
 114                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 115                                 SubErrorCode = 0;
 116                                 break;
 117                         }
 118
 119                         USB_HostState = HOST_STATE_Default;
 120                         break;
 121                 case HOST_STATE_Default:
 122                         USB_ControlRequest = (USB_Request_Header_t)
 123                                 {
 124                                         .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
 125                                         .bRequest      = REQ_GetDescriptor,
 126                                         .wValue        = (DTYPE_Device << 8),
 127                                         .wIndex        = 0,
 128                                         .wLength       = 8,
 129                                 };
 130
 131                         uint8_t DataBuffer[8];
 132
 133                         if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
 134                         {
 135                                 ErrorCode = HOST_ENUMERROR_ControlError;
 136                                 break;
 137                         }
 138
 139                         #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
 140                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
 141                         #else
 142                         USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, bMaxPacketSize0)];
 143                         #endif
 144
 145                         USB_Host_ResetDevice();
 146
 147                         HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
 148                         break;
 149                 case HOST_STATE_Default_PostReset:
 150                         Pipe_DisablePipe();
 151                         Pipe_DeallocateMemory();
 152                         Pipe_ResetPipe(PIPE_CONTROLPIPE);
 153
 154                         Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
 155                                            PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
 156                                            USB_ControlPipeSize, PIPE_BANK_SINGLE);
 157
 158                         if (!(Pipe_IsConfigured()))
 159                         {
 160                                 ErrorCode    = HOST_ENUMERROR_PipeConfigError;
 161                                 SubErrorCode = 0;
 162                                 break;
 163                         }
 164
 165                         Pipe_SetInfiniteINRequests();
 166
 167                         USB_ControlRequest = (USB_Request_Header_t)
 168                                 {
 169                                         .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
 170                                         .bRequest      = REQ_SetAddress,
 171                                         .wValue        = USB_HOST_DEVICEADDRESS,
 172                                         .wIndex        = 0,
 173                                         .wLength       = 0,
 174                                 };
 175
 176                         if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
 177                         {
 178                                 ErrorCode = HOST_ENUMERROR_ControlError;
 179                                 break;
 180                         }
 181
 182                         HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
 183                         break;
 184                 case HOST_STATE_Default_PostAddressSet:
 185                         USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);
 186
 187                         EVENT_USB_DeviceEnumerationComplete();
 188                         USB_HostState = HOST_STATE_Addressed;
 189
 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
 201                 if (USB_IsConnected)
 202                   EVENT_USB_Disconnect();
 203
 204                 USB_ResetInterface();
 205         }
 206 }
 207
 208 uint8_t USB_Host_WaitMS(uint8_t MS)
 209 {
 210         bool    BusSuspended = USB_Host_IsBusSuspended();
 211         uint8_t ErrorCode    = HOST_WAITERROR_Successful;
 212
 213         USB_INT_Clear(USB_INT_HSOFI);
 214         USB_Host_ResumeBus();
 215
 216         while (MS)
 217         {
 218                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 219                 {
 220                         USB_INT_Clear(USB_INT_HSOFI);
 221                         MS--;
 222                 }
 223
 224                 if ((USB_IsConnected == false) || (USB_CurrentMode == USB_MODE_DEVICE))
 225                 {
 226                         ErrorCode = HOST_WAITERROR_DeviceDisconnect;
 227
 228                         break;
 229                 }
 230
 231                 if (Pipe_IsError() == true)
 232                 {
 233                         Pipe_ClearError();
 234                         ErrorCode = HOST_WAITERROR_PipeError;
 235
 236                         break;
 237                 }
 238
 239                 if (Pipe_IsStalled() == true)
 240                 {
 241                         Pipe_ClearStall();
 242                         ErrorCode = HOST_WAITERROR_SetupStalled;
 243
 244                         break;
 245                 }
 246         }
 247
 248         if (BusSuspended)
 249           USB_Host_SuspendBus();
 250
 251         return ErrorCode;
 252 }
 253
 254 static void USB_Host_ResetDevice(void)
 255 {
 256         bool BusSuspended = USB_Host_IsBusSuspended();
 257
 258         USB_INT_Disable(USB_INT_DDISCI);
 259
 260         USB_Host_ResetBus();
 261         while (!(USB_Host_IsBusResetComplete()));
 262
 263         USB_INT_Clear(USB_INT_HSOFI);
 264         USB_Host_ResumeBus();
 265
 266         for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
 267         {
 268                 /* Workaround for powerless-pull-up devices. After a USB bus reset,
 269                    all disconnection interrupts are suppressed while a USB frame is
 270                    looked for - if it is found within 10ms, the device is still
 271                    present.                                                        */
 272
 273                 if (USB_INT_HasOccurred(USB_INT_HSOFI))
 274                 {
 275                         USB_INT_Clear(USB_INT_DDISCI);
 276                         break;
 277                 }
 278
 279                 _delay_ms(1);
 280         }
 281
 282         if (BusSuspended)
 283           USB_Host_SuspendBus();
 284
 285         USB_INT_Enable(USB_INT_DDISCI);
 286 }
 287 #endif