/* 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" #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) { uint8_t bmRequestType = Endpoint_Read_Byte(); uint8_t bRequest = Endpoint_Read_Byte(); bool RequestHandled = false; switch (bRequest) { case REQ_GetStatus: if ((bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE)) || (bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_ENDPOINT))) { USB_Device_GetStatus(bmRequestType); RequestHandled = true; } break; #if !defined(NO_CLEARSET_FEATURE_REQUEST) case REQ_ClearFeature: case REQ_SetFeature: if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_ENDPOINT)) { USB_Device_ClearSetFeature(bRequest, bmRequestType); RequestHandled = true; } break; #endif 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)) RAISE_EVENT(USB_UnhandledControlPacket, bRequest, bmRequestType); if (Endpoint_IsSetupReceived()) { Endpoint_StallTransaction(); Endpoint_ClearSetupReceived(); } } static void USB_Device_SetAddress(void) { uint8_t wValue_LSB = Endpoint_Read_Byte(); Endpoint_ClearSetupReceived(); while (!(Endpoint_IsSetupINReady())); Endpoint_ClearSetupIN(); while (!(Endpoint_IsSetupINReady())); UDADDR = ((1 << ADDEN) | (wValue_LSB & 0x7F)); return; } static void USB_Device_SetConfiguration(void) { uint8_t wValue_LSB = Endpoint_Read_Byte(); bool AlreadyConfigured = (USB_ConfigurationNumber != 0); #if defined(USE_SINGLE_DEVICE_CONFIGURATION) if (wValue_LSB > 1) #else USB_Descriptor_Device_t* DevDescriptorPtr; if ((USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DevDescriptorPtr) == NO_DESCRIPTOR) || #if defined(USE_RAM_DESCRIPTORS) (wValue_LSB > DevDescriptorPtr->NumberOfConfigurations)) #elif defined (USE_EEPROM_DESCRIPTORS) (wValue_LSB > eeprom_read_byte(&DevDescriptorPtr->NumberOfConfigurations))) #else (wValue_LSB > pgm_read_byte(&DevDescriptorPtr->NumberOfConfigurations))) #endif #endif { return; } Endpoint_ClearSetupReceived(); USB_ConfigurationNumber = wValue_LSB; Endpoint_ClearSetupIN(); if (!(AlreadyConfigured) && USB_ConfigurationNumber) RAISE_EVENT(USB_DeviceEnumerationComplete); RAISE_EVENT(USB_ConfigurationChanged); } void USB_Device_GetConfiguration(void) { Endpoint_ClearSetupReceived(); Endpoint_Write_Byte(USB_ConfigurationNumber); Endpoint_ClearSetupIN(); while (!(Endpoint_IsSetupOUTReceived())); Endpoint_ClearSetupOUT(); } static void USB_Device_GetDescriptor(void) { uint16_t wValue = Endpoint_Read_Word_LE(); uint16_t wIndex = Endpoint_Read_Word_LE(); uint16_t wLength = Endpoint_Read_Word_LE(); void* DescriptorPointer; uint16_t DescriptorSize; bool SendZLP; if ((DescriptorSize = USB_GetDescriptor(wValue, wIndex, &DescriptorPointer)) == NO_DESCRIPTOR) return; Endpoint_ClearSetupReceived(); if (wLength > DescriptorSize) wLength = DescriptorSize; while (wLength) { while (!(Endpoint_IsSetupINReady())) { if (Endpoint_IsSetupOUTReceived()) { Endpoint_ClearSetupOUT(); return; } } while (wLength && (Endpoint_BytesInEndpoint() < USB_ControlEndpointSize)) { #if defined(USE_RAM_DESCRIPTORS) Endpoint_Write_Byte(*((uint8_t*)DescriptorPointer++)); #elif defined (USE_EEPROM_DESCRIPTORS) Endpoint_Write_Byte(eeprom_read_byte(DescriptorPointer++)); #else Endpoint_Write_Byte(pgm_read_byte(DescriptorPointer++)); #endif wLength--; } SendZLP = (Endpoint_BytesInEndpoint() == USB_ControlEndpointSize); Endpoint_ClearSetupIN(); } if (SendZLP) { while (!(Endpoint_IsSetupINReady())); Endpoint_ClearSetupIN(); } while (!(Endpoint_IsSetupOUTReceived())); Endpoint_ClearSetupOUT(); } static void USB_Device_GetStatus(const uint8_t bmRequestType) { uint8_t CurrentStatus = 0; Endpoint_Discard_Word(); uint8_t wIndex_LSB = Endpoint_Read_Byte(); switch (bmRequestType) { case (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE): if (USB_CurrentlySelfPowered) CurrentStatus |= FEATURE_SELFPOWERED_ENABLED; if (USB_RemoteWakeupEnabled) CurrentStatus |= FEATURE_REMOTE_WAKEUP_ENABLED; break; case (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_ENDPOINT): Endpoint_SelectEndpoint(wIndex_LSB); CurrentStatus = Endpoint_IsStalled(); break; } Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP); Endpoint_ClearSetupReceived(); Endpoint_Write_Word_LE(CurrentStatus); Endpoint_ClearSetupIN(); while (!(Endpoint_IsSetupOUTReceived())); Endpoint_ClearSetupOUT(); } #if !defined(NO_CLEARSET_FEATURE_REQUEST) static void USB_Device_ClearSetFeature(const uint8_t bRequest, const uint8_t bmRequestType) { uint16_t wValue = Endpoint_Read_Word_LE(); uint16_t wIndex = Endpoint_Read_Word_LE(); switch (bmRequestType & CONTROL_REQTYPE_RECIPIENT) { case REQREC_ENDPOINT: if (wValue == FEATURE_ENDPOINT_HALT) { uint8_t EndpointIndex = (wIndex & ENDPOINT_EPNUM_MASK); if (EndpointIndex != ENDPOINT_CONTROLEP) { Endpoint_SelectEndpoint(EndpointIndex); if (Endpoint_IsEnabled()) { if (bRequest == REQ_ClearFeature) { Endpoint_ClearStall(); Endpoint_ResetFIFO(EndpointIndex); Endpoint_ResetDataToggle(); } else { Endpoint_StallTransaction(); } } Endpoint_SelectEndpoint(ENDPOINT_CONTROLEP); Endpoint_ClearSetupReceived(); Endpoint_ClearSetupIN(); } } break; } } #endif #endif