Esempio n. 1
0
void USB_Host_ProcessNextHostState(void)
{
	uint8_t ErrorCode    = HOST_ENUMERROR_NoError;
	uint8_t SubErrorCode = HOST_ENUMERROR_NoError;

	static uint16_t WaitMSRemaining;
	static uint8_t  PostWaitState;

	switch (USB_HostState)
	{
		case HOST_STATE_WaitForDevice:
			if (WaitMSRemaining)
			{
				if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
				{
					USB_HostState = PostWaitState;
					ErrorCode     = HOST_ENUMERROR_WaitStage;
					break;
				}
				
				if (!(--WaitMSRemaining))
				  USB_HostState = PostWaitState;
			}
		
			break;
		case HOST_STATE_Powered:
			WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
		
			USB_HostState = HOST_STATE_Powered_WaitForDeviceSettle;
			break;
		case HOST_STATE_Powered_WaitForDeviceSettle:
			if (WaitMSRemaining--)
			{
				_delay_ms(1);
				break;
			}
			else
			{
				USB_Host_VBUS_Manual_Off();

				USB_OTGPAD_On();
				USB_Host_VBUS_Auto_Enable();
				USB_Host_VBUS_Auto_On();
				
				USB_HostState = HOST_STATE_Powered_WaitForConnect;
			}
			
			break;
		case HOST_STATE_Powered_WaitForConnect:		
			if (USB_INT_HasOccurred(USB_INT_DCONNI))
			{	
				USB_INT_Clear(USB_INT_DCONNI);
				USB_INT_Clear(USB_INT_DDISCI);

				USB_INT_Clear(USB_INT_VBERRI);
				USB_INT_Enable(USB_INT_VBERRI);
					
				USB_Host_ResumeBus();
				Pipe_ClearPipes();
				
				HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Powered_DoReset);
			}

			break;
		case HOST_STATE_Powered_DoReset:
			USB_Host_ResetDevice();

			HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered_ConfigPipe);
			break;
		case HOST_STATE_Powered_ConfigPipe:
			Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
							   PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
							   PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE);		
		
			if (!(Pipe_IsConfigured()))
			{
				ErrorCode    = HOST_ENUMERROR_PipeConfigError;
				SubErrorCode = 0;
				break;
			}

			USB_HostState = HOST_STATE_Default;
			break;
		case HOST_STATE_Default:
			USB_ControlRequest = (USB_Request_Header_t)
				{
					.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
					.bRequest      = REQ_GetDescriptor,
					.wValue        = (DTYPE_Device << 8),
					.wIndex        = 0,
					.wLength       = 8,
				};

			uint8_t DataBuffer[8];

			if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
			{
				ErrorCode = HOST_ENUMERROR_ControlError;
				break;
			}

			USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
	
			USB_Host_ResetDevice();
			
			HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
			break;
		case HOST_STATE_Default_PostReset:
			Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
			                   PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
			                   USB_ControlPipeSize, PIPE_BANK_SINGLE);

			if (!(Pipe_IsConfigured()))
			{
				ErrorCode    = HOST_ENUMERROR_PipeConfigError;
				SubErrorCode = 0;
				break;
			}

			USB_ControlRequest = (USB_Request_Header_t)
				{
					.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
					.bRequest      = REQ_SetAddress,
					.wValue        = USB_HOST_DEVICEADDRESS,
					.wIndex        = 0,
					.wLength       = 0,
				};

			if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
			{
				ErrorCode = HOST_ENUMERROR_ControlError;
				break;
			}

			HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
			break;
		case HOST_STATE_Default_PostAddressSet:
			USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);

			EVENT_USB_Host_DeviceEnumerationComplete();
			USB_HostState = HOST_STATE_Addressed;
			break;
	}

	if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
	{
		EVENT_USB_Host_DeviceEnumerationFailed(ErrorCode, SubErrorCode);

		USB_Host_VBUS_Auto_Off();

		EVENT_USB_Host_DeviceUnattached();

		USB_ResetInterface();
	}
}

uint8_t USB_Host_WaitMS(uint8_t MS)
{
	bool    BusSuspended = USB_Host_IsBusSuspended();
	uint8_t ErrorCode    = HOST_WAITERROR_Successful;
	bool    HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
	
	USB_INT_Disable(USB_INT_HSOFI);
	USB_INT_Clear(USB_INT_HSOFI);

	USB_Host_ResumeBus();

	while (MS)
	{
		if (USB_INT_HasOccurred(USB_INT_HSOFI))
		{
			USB_INT_Clear(USB_INT_HSOFI);
			MS--;
		}
					
		if ((USB_HostState == HOST_STATE_Unattached) || (USB_CurrentMode != USB_MODE_Host))
		{
			ErrorCode = HOST_WAITERROR_DeviceDisconnect;
			
			break;
		}

		if (Pipe_IsError() == true)
		{
			Pipe_ClearError();
			ErrorCode = HOST_WAITERROR_PipeError;
			
			break;
		}
		
		if (Pipe_IsStalled() == true)
		{
			Pipe_ClearStall();
			ErrorCode = HOST_WAITERROR_SetupStalled;
			
			break;			
		}
	}

	if (BusSuspended)
	  USB_Host_SuspendBus();

	if (HSOFIEnabled)
	  USB_INT_Enable(USB_INT_HSOFI);

	return ErrorCode;
}

static void USB_Host_ResetDevice(void)
{
	bool BusSuspended = USB_Host_IsBusSuspended();

	USB_INT_Disable(USB_INT_DDISCI);
	
	USB_Host_ResetBus();
	while (!(USB_Host_IsBusResetComplete()));
	USB_Host_ResumeBus();

	bool HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);

	USB_INT_Disable(USB_INT_HSOFI);
	USB_INT_Clear(USB_INT_HSOFI);
	
	for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
	{
		/* Workaround for powerless-pull-up devices. After a USB bus reset,
		   all disconnection interrupts are suppressed while a USB frame is
		   looked for - if it is found within 10ms, the device is still
		   present.                                                        */

		if (USB_INT_HasOccurred(USB_INT_HSOFI))
		{
			USB_INT_Clear(USB_INT_HSOFI);
			USB_INT_Clear(USB_INT_DDISCI);
			break;
		}
		
		_delay_ms(1);
	}

	if (HSOFIEnabled)
	  USB_INT_Enable(USB_INT_HSOFI);

	if (BusSuspended)
	  USB_Host_SuspendBus();

	USB_INT_Enable(USB_INT_DDISCI);
}
Esempio n. 2
0
void USB_Host_ProcessNextHostState(uint8_t corenum)
{
	uint8_t ErrorCode    = HOST_ENUMERROR_NoError;
	uint8_t SubErrorCode = HOST_ENUMERROR_NoError;

	static uint16_t WaitMSRemaining;
	static uint8_t  PostWaitState;

	switch (USB_HostState[corenum])
	{
		case HOST_STATE_WaitForDevice:
			if (WaitMSRemaining)
			{
				if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
				{
					USB_HostState[corenum] = PostWaitState;
					ErrorCode     = HOST_ENUMERROR_WaitStage;
					break;
				}

				if (!(--WaitMSRemaining))
				  USB_HostState[corenum] = PostWaitState;
			}
			break;

		case HOST_STATE_Powered:
			WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;

			USB_HostState[corenum] = HOST_STATE_Powered_WaitForDeviceSettle;
			break;

		case HOST_STATE_Powered_WaitForDeviceSettle:
			if (WaitMSRemaining--)
			{
				Delay_MS(1);
				break;
			}
			else
			{
				USB_Host_VBUS_Manual_Off();

				USB_OTGPAD_On();
				USB_Host_VBUS_Auto_Enable();
				USB_Host_VBUS_Auto_On();

				USB_HostState[corenum] = HOST_STATE_Powered_WaitForConnect;
			}
			break;

		case HOST_STATE_Powered_WaitForConnect:
			HOST_TASK_NONBLOCK_WAIT(corenum, 100, HOST_STATE_Powered_DoReset);
			break;

		case HOST_STATE_Powered_DoReset:
		{
			HCD_USB_SPEED DeviceSpeed;
			HcdRhPortReset(corenum,1);
			HcdGetDeviceSpeed(corenum, 1, &DeviceSpeed); // skip checking status
			USB_Host_SetDeviceSpeed(corenum,DeviceSpeed);
			HOST_TASK_NONBLOCK_WAIT(corenum, 200, HOST_STATE_Powered_ConfigPipe);
		}
			break;

		case HOST_STATE_Powered_ConfigPipe:
			if (!Pipe_ConfigurePipe(corenum, PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
							   PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
							   PIPE_CONTROLPIPE_DEFAULT_SIZE, PIPE_BANK_SINGLE) )
			{
				ErrorCode    = HOST_ENUMERROR_PipeConfigError;
				SubErrorCode = 0;
				break;
			}

			USB_HostState[corenum] = HOST_STATE_Default;
			break;

		case HOST_STATE_Default:
		{
			USB_Descriptor_Device_t DevDescriptor;
			USB_ControlRequest = (USB_Request_Header_t)
				{
					.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
					.bRequest      = REQ_GetDescriptor,
					.wValue        = (DTYPE_Device << 8),
					.wIndex        = 0,
					.wLength       = 8,
				};

			if ((SubErrorCode = USB_Host_SendControlRequest(corenum, &DevDescriptor)) != HOST_SENDCONTROL_Successful)
			{
				ErrorCode = HOST_ENUMERROR_ControlError;
				break;
			}

			USB_Host_ControlPipeSize[corenum] = DevDescriptor.Endpoint0Size;

			Pipe_ClosePipe(corenum, PIPE_CONTROLPIPE);
			HcdRhPortReset(corenum,1);

			HOST_TASK_NONBLOCK_WAIT(corenum, 200, HOST_STATE_Default_PostReset);
		}
			break;

		case HOST_STATE_Default_PostReset:
			if (!Pipe_ConfigurePipe(corenum, PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
			                   PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
			                   USB_Host_ControlPipeSize[corenum], PIPE_BANK_SINGLE) )
			{
				ErrorCode    = HOST_ENUMERROR_PipeConfigError;
				SubErrorCode = 0;
				break;
			}

			USB_ControlRequest = (USB_Request_Header_t)
				{
					.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
					.bRequest      = REQ_SetAddress,
					.wValue        = USB_HOST_DEVICEADDRESS,
					.wIndex        = 0,
					.wLength       = 0,
				};

			if ((SubErrorCode = USB_Host_SendControlRequest(corenum, NULL)) != HOST_SENDCONTROL_Successful)
			{
				ErrorCode = HOST_ENUMERROR_ControlError;
				break;
			}

			Pipe_ClosePipe(corenum, PIPE_CONTROLPIPE);
			HOST_TASK_NONBLOCK_WAIT(corenum, 100, HOST_STATE_Default_PostAddressSet);
			break;

		case HOST_STATE_Default_PostAddressSet:
			Pipe_ConfigurePipe(corenum, PIPE_CONTROLPIPE, EP_TYPE_CONTROL,
								PIPE_TOKEN_SETUP, ENDPOINT_CONTROLEP,
								USB_Host_ControlPipeSize[corenum], PIPE_BANK_SINGLE);

			USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);

			USB_HostState[corenum] = HOST_STATE_Addressed;

			EVENT_USB_Host_DeviceEnumerationComplete(corenum);
			break;
	}

	if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState[corenum] != HOST_STATE_Unattached))
	{
		EVENT_USB_Host_DeviceEnumerationFailed(corenum, ErrorCode, SubErrorCode);

		USB_Host_VBUS_Auto_Off();

		EVENT_USB_Host_DeviceUnattached(corenum);

		USB_ResetInterface(corenum);
	}
}

uint8_t USB_Host_WaitMS(uint8_t MS)
{
	return HOST_WAITERROR_Successful;
}

void USB_Host_Enumerate (uint8_t HostId) /* Part of Interrupt Service Routine */
{
//	CurrentHostID = HostId;
//	hostselected = HostId;
	EVENT_USB_Host_DeviceAttached(HostId);
	USB_HostState[HostId] = HOST_STATE_Powered;
}

void USB_Host_DeEnumerate(uint8_t HostId) /* Part of Interrupt Service Routine */
{
	uint8_t i;

	Pipe_ClosePipe(HostId, PIPE_CONTROLPIPE); // FIXME close only relevant pipes , take long time in ISR
	for(i = PIPE_CONTROLPIPE+1; i < PIPE_TOTAL_PIPES; i++)
	{
		if(PipeInfo[HostId][i].PipeHandle != 0)
		{
			Pipe_ClosePipe(HostId, i);
		}
	}

	EVENT_USB_Host_DeviceUnattached(HostId);
	USB_HostState[HostId] = HOST_STATE_Unattached;
}