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DevChapter9.c

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  • DevChapter9.c 9.49 KiB
    /*
                 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 "../HighLevel/USBMode.h"
    
    #if defined(USB_CAN_BE_DEVICE)
    
    #define  INCLUDE_FROM_DEVCHAPTER9_C
    #include "DevChapter9.h"
    
    uint8_t USB_ConfigurationNumber;
    bool    USB_RemoteWakeupEnabled;
    bool    USB_CurrentlySelfPowered;
    
    void USB_Device_ProcessControlPacket(void)
    {
    	bool     RequestHandled = false;
    	uint8_t* RequestHeader  = (uint8_t*)&USB_ControlRequest;
    	
    	for (uint8_t RequestHeaderByte = 0; RequestHeaderByte < sizeof(USB_Request_Header_t); RequestHeaderByte++)
    	  *(RequestHeader++) = Endpoint_Read_Byte();
    	  
    	uint8_t bmRequestType = USB_ControlRequest.bmRequestType;
    	
    	switch (USB_ControlRequest.bRequest)
    	{
    		case REQ_GetStatus:
    			if ((bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE)) ||
    			    (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_ENDPOINT)))
    			{
    				USB_Device_GetStatus();
    				RequestHandled = true;
    			}
    
    			break;
    		case REQ_ClearFeature:
    		case REQ_SetFeature:
    			if ((bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE)) ||
    			    (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_ENDPOINT)))
    			{
    				USB_Device_ClearSetFeature();
    				RequestHandled = true;
    			}
    
    			break;
    		case REQ_SetAddress:
    			if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE))
    			{
    				USB_Device_SetAddress();
    				RequestHandled = true;
    			}
    
    			break;
    		case REQ_GetDescriptor:
    			if ((bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE)) ||
    			    (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_INTERFACE)))
    			{
    				USB_Device_GetDescriptor();
    				RequestHandled = true;
    			}
    			
    			break;
    		case REQ_GetConfiguration:
    			if (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE))
    			{
    				USB_Device_GetConfiguration();
    				RequestHandled = true;
    			}
    
    			break;
    		case REQ_SetConfiguration:
    			if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE))
    			{
    				USB_Device_SetConfiguration();
    				RequestHandled = true;
    			}
    
    			break;
    	}
    
    	if (!(RequestHandled))
    	  EVENT_USB_UnhandledControlPacket();
    	  
    	if (Endpoint_IsSETUPReceived())
    	{
    		Endpoint_StallTransaction();
    		Endpoint_ClearSETUP();		
    	}
    }
    
    static void USB_Device_SetAddress(void)
    {
    	Endpoint_ClearSETUP();
    	
    	Endpoint_ClearIN();
    	
    	while (!(Endpoint_IsINReady()));
    
    	UDADDR = ((1 << ADDEN) | ((uint8_t)USB_ControlRequest.wValue & 0x7F));
    
    	return;
    }
    
    static void USB_Device_SetConfiguration(void)
    {
    	bool AlreadyConfigured = (USB_ConfigurationNumber != 0);
    
    #if defined(USE_SINGLE_DEVICE_CONFIGURATION)
    	if ((uint8_t)USB_ControlRequest.wValue > 1)
    #else
    	USB_Descriptor_Device_t* DevDescriptorPtr;
    
    	if ((CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DevDescriptorPtr) == NO_DESCRIPTOR) ||
    	#if defined(USE_RAM_DESCRIPTORS)
    	    ((uint8_t)USB_ControlRequest.wValue > DevDescriptorPtr->NumberOfConfigurations))
    	#elif defined (USE_EEPROM_DESCRIPTORS)
    	    ((uint8_t)USB_ControlRequest.wValue > eeprom_read_byte(&DevDescriptorPtr->NumberOfConfigurations)))
    	#else
    	    ((uint8_t)USB_ControlRequest.wValue > pgm_read_byte(&DevDescriptorPtr->NumberOfConfigurations)))
    	#endif
    #endif
    	{
    		return;
    	}
    	
    	Endpoint_ClearSETUP();
    
    	USB_ConfigurationNumber = (uint8_t)USB_ControlRequest.wValue;
    
    	Endpoint_ClearIN();
    
    	if (!(AlreadyConfigured) && USB_ConfigurationNumber)
    	  EVENT_USB_DeviceEnumerationComplete();
    
    	EVENT_USB_ConfigurationChanged();
    }
    
    void USB_Device_GetConfiguration(void)
    {
    	Endpoint_ClearSETUP();
    
    	Endpoint_Write_Byte(USB_ConfigurationNumber);
    	
    	Endpoint_ClearIN();
    
    	while (!(Endpoint_IsOUTReceived()));
    	Endpoint_ClearOUT();
    }
    
    static void USB_Device_GetDescriptor(void)
    {
    	void*    DescriptorPointer;
    	uint16_t DescriptorSize;
    	
    	#if !defined(NO_INTERNAL_SERIAL) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
    	if (USB_ControlRequest.wValue == ((DTYPE_String << 8) | USE_INTERNAL_SERIAL))
    	{
    		struct
    		{
    			USB_Descriptor_Header_t Header;
    			int16_t                 UnicodeString[12];
    		} SignatureDescriptor;
    
    		#if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
    			SignatureDescriptor.Header.Size            = sizeof(SignatureDescriptor);
    			SignatureDescriptor.Header.Type            = DTYPE_String;
    		#else
    			SignatureDescriptor.Header.bLength         = sizeof(SignatureDescriptor);
    			SignatureDescriptor.Header.bDescriptorType = DTYPE_String;
    		#endif
    		
    		uint8_t  SigReadAddress  = 0x0E;		
    		bool     OddRead         = false;
    
    		for (uint8_t SerialCharNum = 0; SerialCharNum < 12; SerialCharNum++)
    		{
    			uint8_t SerialByte = boot_signature_byte_get(SigReadAddress);
    			
    			if (OddRead)
    			{
    				SerialByte >>= 4;
    				SigReadAddress++;
    			}
    			else
    			{
    				SerialByte &= 0x0F;
    			}
    			
    			OddRead = !(OddRead);
    
    			if (SerialByte < 0x0A)
    			  SerialByte += '0';
    			else
    			  SerialByte += ('A' - 0x0A);
    
    			SignatureDescriptor.UnicodeString[SerialCharNum] = SerialByte;
    		}
    		
    		Endpoint_ClearSETUP();
    		Endpoint_Write_Control_Stream_LE(&SignatureDescriptor, sizeof(SignatureDescriptor));
    		Endpoint_ClearOUT();
    
    		return;
    	}
    	#endif
    	
    	if ((DescriptorSize = CALLBACK_USB_GetDescriptor(USB_ControlRequest.wValue, USB_ControlRequest.wIndex,
    	                                                 &DescriptorPointer)) == NO_DESCRIPTOR)
    	{
    		return;
    	}
    	
    	Endpoint_ClearSETUP();
    
    	#if defined(USE_RAM_DESCRIPTORS)
    	Endpoint_Write_Control_Stream_LE(DescriptorPointer, DescriptorSize);
    	#else
    	bool SendZLP;
    	
    	if (USB_ControlRequest.wLength > DescriptorSize)
    	  USB_ControlRequest.wLength = DescriptorSize;
    	
    	while (USB_ControlRequest.wLength)
    	{
    		while (!(Endpoint_IsINReady()))
    		{
    			if (Endpoint_IsOUTReceived())
    			{
    				Endpoint_ClearOUT();
    				return;
    			}		
    		}
    		
    		while (USB_ControlRequest.wLength && (Endpoint_BytesInEndpoint() < USB_ControlEndpointSize))
    		{
    			#if defined (USE_EEPROM_DESCRIPTORS)
    			Endpoint_Write_Byte(eeprom_read_byte(DescriptorPointer++));		
    			#else
    			Endpoint_Write_Byte(pgm_read_byte(DescriptorPointer++));
    			#endif
    			
    			USB_ControlRequest.wLength--;
    		}
    		
    		SendZLP = (Endpoint_BytesInEndpoint() == USB_ControlEndpointSize);
    		Endpoint_ClearIN();
    	}
    	
    	if (SendZLP)
    	{
    		while (!(Endpoint_IsINReady()));
    		Endpoint_ClearIN();
    	}
    
    	while (!(Endpoint_IsOUTReceived()));
    	#endif
    	
    	Endpoint_ClearOUT();
    }
    
    static void USB_Device_GetStatus(void)
    {
    	uint8_t CurrentStatus = 0;
    
    	switch (USB_ControlRequest.bmRequestType)
    	{
    		case (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE):
    			if (USB_CurrentlySelfPowered)
    			  CurrentStatus |= FEATURE_SELFPOWERED_ENABLED;
    			
    			if (USB_RemoteWakeupEnabled)
    			  CurrentStatus |= FEATURE_REMOTE_WAKEUP_ENABLED;
    			
    			break;
    #if !defined(CONTROL_ONLY_DEVICE)
    		case (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_ENDPOINT):
    			Endpoint_SelectEndpoint((uint8_t)USB_ControlRequest.wIndex);
    
    			CurrentStatus = Endpoint_IsStalled();
    
    			Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);			  
    
    			break;
    #endif
    	}
    
    	Endpoint_ClearSETUP();
    
    	Endpoint_Write_Word_LE(CurrentStatus);
    
    	Endpoint_ClearIN();
    	
    	while (!(Endpoint_IsOUTReceived()));
    	Endpoint_ClearOUT();
    }
    
    static void USB_Device_ClearSetFeature(void)
    {	
    	switch (USB_ControlRequest.bmRequestType & CONTROL_REQTYPE_RECIPIENT)
    	{
    		case REQREC_DEVICE:
    			if ((uint8_t)USB_ControlRequest.wValue == FEATURE_REMOTE_WAKEUP)
    			  USB_RemoteWakeupEnabled = (USB_ControlRequest.bRequest == REQ_SetFeature);
    			else
    			  return;
    			
    			break;			
    #if !defined(CONTROL_ONLY_DEVICE)
    		case REQREC_ENDPOINT:
    			if ((uint8_t)USB_ControlRequest.wValue == FEATURE_ENDPOINT_HALT)
    			{
    				uint8_t EndpointIndex = ((uint8_t)USB_ControlRequest.wIndex & ENDPOINT_EPNUM_MASK);
    				
    				if (EndpointIndex == ENDPOINT_CONTROLEP)
    				  return;
    
    				Endpoint_SelectEndpoint(EndpointIndex);
    
    				if (Endpoint_IsEnabled())
    				{				
    					if (USB_ControlRequest.bRequest == REQ_ClearFeature)
    					{
    						Endpoint_ClearStall();
    						Endpoint_ResetFIFO(EndpointIndex);
    						Endpoint_ResetDataToggle();
    					}
    					else
    					{
    						Endpoint_StallTransaction();
    					}
    				}
    			}
    			
    			break;
    #endif
    	}
    
    	Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP);
    
    	Endpoint_ClearSETUP();
    
    	Endpoint_ClearIN();
    }
    
    #endif