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/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
#include "USBMode.h"
#define INCLUDE_FROM_USBTASK_C
#include "USBTask.h"
volatile bool USB_IsSuspended;
volatile bool USB_IsConnected;
volatile bool USB_IsInitialized;
USB_Request_Header_t USB_ControlRequest;
#if defined(USB_CAN_BE_HOST)
volatile uint8_t USB_HostState;
#endif
TASK(USB_USBTask)
{
#if defined(USB_HOST_ONLY)
USB_HostTask();
#elif defined(USB_DEVICE_ONLY)
USB_DeviceTask();
#else
if (USB_CurrentMode == USB_MODE_DEVICE)
USB_DeviceTask();
else if (USB_CurrentMode == USB_MODE_HOST)
USB_HostTask();
#endif
}
#if defined(USB_CAN_BE_DEVICE)
static void USB_DeviceTask(void)
{
if (USB_IsConnected)
{
uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
if (Endpoint_IsSETUPReceived())
{
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
{
USB_Device_ProcessControlPacket();
}
}
Endpoint_SelectEndpoint(PrevEndpoint);
}
}
#endif
#if defined(USB_CAN_BE_HOST)
static void USB_HostTask(void)
{
uint8_t ErrorCode = HOST_ENUMERROR_NoError;
uint8_t SubErrorCode = HOST_ENUMERROR_NoError;
uint8_t PrevPipe = Pipe_GetCurrentPipe();
static uint16_t WaitMSRemaining;
static uint8_t PostWaitState;
Pipe_SelectPipe(PIPE_CONTROLPIPE);
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;
}
WaitMSRemaining--;
}
else
{
USB_HostState = PostWaitState;
}
break;
case HOST_STATE_Attached:
WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
USB_HostState = HOST_STATE_Attached_WaitForDeviceSettle;
break;
case HOST_STATE_Attached_WaitForDeviceSettle:
_delay_ms(1);
if (!(WaitMSRemaining--))
{
USB_Host_VBUS_Manual_Off();
USB_OTGPAD_On();
USB_Host_VBUS_Auto_Enable();
USB_Host_VBUS_Auto_On();
USB_HostState = HOST_STATE_Attached_WaitForConnect;
}
break;
case HOST_STATE_Attached_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_IsConnected = true;
RAISE_EVENT(USB_Connect);
USB_Host_ResumeBus();
Pipe_ClearPipes();
HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Attached_DoReset);
}
break;
case HOST_STATE_Attached_DoReset:
USB_Host_ResetDevice();
HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered);
break;
case HOST_STATE_Powered:
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;
}
#if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
#else
USB_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, bMaxPacketSize0)];
#endif
USB_Host_ResetDevice();
HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
break;
case HOST_STATE_Default_PostReset:
Pipe_DisablePipe();
Pipe_DeallocateMemory();
Pipe_ResetPipe(PIPE_CONTROLPIPE);
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;
}
Pipe_SetInfiniteINRequests();
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);
RAISE_EVENT(USB_DeviceEnumerationComplete);
USB_HostState = HOST_STATE_Addressed;
break;
}
if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
{
RAISE_EVENT(USB_DeviceEnumerationFailed, ErrorCode, SubErrorCode);
USB_Host_VBUS_Auto_Off();
RAISE_EVENT(USB_DeviceUnattached);
if (USB_IsConnected)
RAISE_EVENT(USB_Disconnect);
USB_ResetInterface();
}
Pipe_SelectPipe(PrevPipe);
}
#endif
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