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312 lines
11 KiB
C
312 lines
11 KiB
C
/*
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LUFA Library
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Copyright (C) Dean Camera, 2012.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* USB Device Descriptors, for library use when in USB device mode. Descriptors are special
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* computer-readable structures which the host requests upon device enumeration, to determine
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* the device's capabilities and functions.
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*/
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#include "AVRISPDescriptors.h"
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#if defined(RESET_TOGGLES_LIBUSB_COMPAT) || defined(__DOXYGEN__)
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static bool AVRISP_NeedCompatibilitySwitch ATTR_NO_INIT;
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/** Current AVRISP data IN endpoint address. */
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uint8_t AVRISP_CurrDataINEndpointAddress;
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/** Saved AVRISP data IN endpoint address in EEPROM. */
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uint8_t AVRISP_CurrDataINEndpointAddress_EEPROM EEMEM;
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#endif
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/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
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* device characteristics, including the supported USB version, control endpoint size and the
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* number of device configurations. The descriptor is read out by the USB host when the enumeration
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* process begins.
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*/
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const USB_Descriptor_Device_t PROGMEM AVRISP_DeviceDescriptor =
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{
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.Header = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
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.USBSpecification = VERSION_BCD(01.10),
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.Class = USB_CSCP_VendorSpecificClass,
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.SubClass = USB_CSCP_NoDeviceSubclass,
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.Protocol = USB_CSCP_NoDeviceProtocol,
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.Endpoint0Size = FIXED_CONTROL_ENDPOINT_SIZE,
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.VendorID = 0x03EB,
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.ProductID = 0x2104,
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.ReleaseNumber = VERSION_BCD(02.00),
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.ManufacturerStrIndex = 0x01,
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.ProductStrIndex = 0x02,
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.SerialNumStrIndex = 0x03,
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.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
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};
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/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
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* of the device in one of its supported configurations, including information about any device interfaces
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* and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
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* a configuration so that the host may correctly communicate with the USB device.
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*/
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AVRISP_USB_Descriptor_Configuration_t AVRISP_ConfigurationDescriptor =
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{
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.Config =
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{
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.Header = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
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.TotalConfigurationSize = sizeof(AVRISP_USB_Descriptor_Configuration_t),
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.TotalInterfaces = 1,
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.ConfigurationNumber = 1,
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.ConfigurationStrIndex = NO_DESCRIPTOR,
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.ConfigAttributes = (USB_CONFIG_ATTR_RESERVED | USB_CONFIG_ATTR_SELFPOWERED),
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.MaxPowerConsumption = USB_CONFIG_POWER_MA(100)
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},
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.AVRISP_Interface =
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{
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.Header = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
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.InterfaceNumber = 0,
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.AlternateSetting = 0,
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.TotalEndpoints = 2,
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.Class = USB_CSCP_VendorSpecificClass,
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.SubClass = USB_CSCP_NoDeviceSubclass,
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.Protocol = USB_CSCP_NoDeviceProtocol,
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.InterfaceStrIndex = NO_DESCRIPTOR
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},
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.AVRISP_DataInEndpoint =
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{
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.Header = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
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#if defined(RESET_TOGGLES_LIBUSB_COMPAT)
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.EndpointAddress = 0,
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#else
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.EndpointAddress = AVRISP_DATA_IN_EPADDR,
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#endif
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.Attributes = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
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.EndpointSize = AVRISP_DATA_EPSIZE,
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.PollingIntervalMS = 0x0A
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},
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.AVRISP_DataOutEndpoint =
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{
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.Header = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
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.EndpointAddress = AVRISP_DATA_OUT_EPADDR,
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.Attributes = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
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.EndpointSize = AVRISP_DATA_EPSIZE,
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.PollingIntervalMS = 0x0A
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},
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};
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/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
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* the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
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* via the language ID table available at USB.org what languages the device supports for its string descriptors.
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*/
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const USB_Descriptor_String_t PROGMEM AVRISP_LanguageString =
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{
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.Header = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
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.UnicodeString = {LANGUAGE_ID_ENG}
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};
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/** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
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* form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
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* Descriptor.
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*/
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const USB_Descriptor_String_t PROGMEM AVRISP_ManufacturerString =
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{
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.Header = {.Size = USB_STRING_LEN(5), .Type = DTYPE_String},
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.UnicodeString = L"ATMEL"
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};
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/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
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* and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
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* Descriptor.
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*/
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const USB_Descriptor_String_t PROGMEM AVRISP_ProductString =
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{
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.Header = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
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.UnicodeString = L"AVRISP mkII"
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};
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/** Serial number string. This is a Unicode string containing the device's unique serial number, expressed as a
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* series of uppercase hexadecimal digits.
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*/
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const USB_Descriptor_String_t PROGMEM AVRISP_SerialString =
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{
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.Header = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
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.UnicodeString = L"000200012345\0" // Note: Real AVRISP-MKII has the embedded NUL byte, bug in firmware?
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};
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/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
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* documentation) by the application code so that the address and size of a requested descriptor can be given
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* to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
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* is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
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* USB host.
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*/
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uint16_t AVRISP_GetDescriptor(const uint16_t wValue,
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const uint8_t wIndex,
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const void** const DescriptorAddress,
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uint8_t* DescriptorMemorySpace)
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{
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const uint8_t DescriptorType = (wValue >> 8);
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const uint8_t DescriptorNumber = (wValue & 0xFF);
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const void* Address = NULL;
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uint16_t Size = NO_DESCRIPTOR;
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*DescriptorMemorySpace = MEMSPACE_FLASH;
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switch (DescriptorType)
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{
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case DTYPE_Device:
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Address = &AVRISP_DeviceDescriptor;
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Size = sizeof(USB_Descriptor_Device_t);
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break;
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case DTYPE_Configuration:
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*DescriptorMemorySpace = MEMSPACE_RAM;
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#if defined(RESET_TOGGLES_LIBUSB_COMPAT)
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AVRISP_ConfigurationDescriptor.AVRISP_DataInEndpoint.EndpointAddress = AVRISP_CurrDataINEndpointAddress;
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#endif
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Address = &AVRISP_ConfigurationDescriptor;
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Size = sizeof(AVRISP_USB_Descriptor_Configuration_t);
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break;
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case DTYPE_String:
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switch (DescriptorNumber)
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{
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case 0x00:
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Address = &AVRISP_LanguageString;
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Size = pgm_read_byte(&AVRISP_LanguageString.Header.Size);
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break;
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case 0x01:
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Address = &AVRISP_ManufacturerString;
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Size = pgm_read_byte(&AVRISP_ManufacturerString.Header.Size);
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break;
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case 0x02:
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Address = &AVRISP_ProductString;
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Size = pgm_read_byte(&AVRISP_ProductString.Header.Size);
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break;
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case 0x03:
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Address = &AVRISP_SerialString;
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Size = pgm_read_byte(&AVRISP_SerialString.Header.Size);
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break;
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}
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break;
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}
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*DescriptorAddress = Address;
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return Size;
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}
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#if defined(RESET_TOGGLES_LIBUSB_COMPAT) || defined(__DOXYGEN__)
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/** Checks the state of the system status register MCUSR and indicates via a flag if
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* the current AVRISP driver compatibility mode needs to be reset.
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*
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* When the \c RESET_TOGGLES_LIBUSB_COMPAT compile time option is enabled, pulling
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* the reset line of the AVR low will toggle between Jungo and libUSB compatibility
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* modes. Other forms of reset (such as power on or watchdog) will not force a mode
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* change.
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*/
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void CheckExternalReset(void)
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{
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/* If an external reset occured, we need to change compatibility mode */
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AVRISP_NeedCompatibilitySwitch = (MCUSR == (1 << EXTRF));
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MCUSR = 0;
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}
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/** Updates the device descriptors so that the correct compatibility mode is used
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* when the \c RESET_TOGGLES_LIBUSB_COMPAT compile time option is enabled. This
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* configures the programmer for either Jungo or libUSB driver compatibility. Each
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* time the AVR is reset via pulling the reset line low the compatibility mode will
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* be toggled. The current mode is stored in EEPROM and preserved through power
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* cycles of the AVR.
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*/
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void UpdateCurrentCompatibilityMode(void)
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{
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/* Load the current IN endpoint address stored in EEPROM */
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AVRISP_CurrDataINEndpointAddress = eeprom_read_byte(&AVRISP_CurrDataINEndpointAddress_EEPROM);
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/* Check if we need to switch compatibility modes */
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if (AVRISP_NeedCompatibilitySwitch)
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{
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/* Toggle between compatibility modes */
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AVRISP_CurrDataINEndpointAddress = (AVRISP_CurrDataINEndpointAddress == AVRISP_DATA_IN_EPADDR_LIBUSB) ?
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AVRISP_DATA_IN_EPADDR_JUNGO : AVRISP_DATA_IN_EPADDR_LIBUSB;
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/* Save the new mode into EEPROM */
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eeprom_update_byte(&AVRISP_CurrDataINEndpointAddress_EEPROM, AVRISP_CurrDataINEndpointAddress);
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}
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LEDs_SetAllLEDs(LEDS_NO_LEDS);
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/* Validate IN endpoint address and indicate current mode via LED flashes */
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switch (AVRISP_CurrDataINEndpointAddress)
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{
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default:
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/* Default to Jungo compatibility mode if saved EEPROM is invalid */
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AVRISP_CurrDataINEndpointAddress = AVRISP_DATA_IN_EPADDR_JUNGO;
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case AVRISP_DATA_IN_EPADDR_JUNGO:
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/* Two flashes for Jungo compatibility mode */
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for (uint8_t i = 0; i < 4; i++)
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{
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LEDs_ToggleLEDs(LEDS_ALL_LEDS);
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Delay_MS(100);
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}
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break;
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case AVRISP_DATA_IN_EPADDR_LIBUSB:
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/* Five flashes for libUSB compatibility mode */
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for (uint8_t i = 0; i < 10; i++)
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{
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LEDs_ToggleLEDs(LEDS_ALL_LEDS);
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Delay_MS(100);
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}
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break;
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}
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}
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#endif
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