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Diffstat (limited to 'LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h')
| -rw-r--r-- | LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h b/LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h new file mode 100644 index 0000000000..1b6e2ef43c --- /dev/null +++ b/LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.h @@ -0,0 +1,432 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, 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 disclaims 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. +*/ + +/** \file + * \brief USB Controller definitions for the AVR8 microcontrollers. + * \copydetails Group_USBManagement_AVR8 + * + * \note This file should not be included directly. It is automatically included as needed by the USB driver + * dispatch header located in LUFA/Drivers/USB/USB.h. + */ + +/** \ingroup Group_USBManagement + * \defgroup Group_USBManagement_AVR8 USB Interface Management (AVR8) + * \brief USB Controller definitions for the AVR8 microcontrollers. + * + * Functions, macros, variables, enums and types related to the setup and management of the USB interface. + * + * @{ + */ + +#ifndef __USBCONTROLLER_AVR8_H__ +#define __USBCONTROLLER_AVR8_H__ + + /* Includes: */ + #include "../../../../Common/Common.h" + #include "../USBMode.h" + #include "../Events.h" + #include "../USBTask.h" + #include "../USBInterrupt.h" + + #if defined(USB_CAN_BE_HOST) || defined(__DOXYGEN__) + #include "../Host.h" + #include "../OTG.h" + #include "../Pipe.h" + #include "../HostStandardReq.h" + #include "../PipeStream.h" + #endif + + #if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__) + #include "../Device.h" + #include "../Endpoint.h" + #include "../DeviceStandardReq.h" + #include "../EndpointStream.h" + #endif + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Preprocessor Checks and Defines: */ + #if !defined(__INCLUDE_FROM_USB_DRIVER) + #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead. + #endif + + #if !defined(F_USB) + #error F_USB is not defined. You must define F_USB to the frequency of the unprescaled USB controller clock in your project makefile. + #endif + + #if (F_USB == 8000000) + #if (defined(__AVR_AT90USB82__) || defined(__AVR_AT90USB162__) || \ + defined(__AVR_ATmega8U2__) || defined(__AVR_ATmega16U2__) || \ + defined(__AVR_ATmega32U2__)) + #define USB_PLL_PSC 0 + #elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) + #define USB_PLL_PSC 0 + #elif (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)) + #define USB_PLL_PSC ((1 << PLLP1) | (1 << PLLP0)) + #elif (defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1287__)) + #define USB_PLL_PSC ((1 << PLLP1) | (1 << PLLP0)) + #endif + #elif (F_USB == 16000000) + #if (defined(__AVR_AT90USB82__) || defined(__AVR_AT90USB162__) || \ + defined(__AVR_ATmega8U2__) || defined(__AVR_ATmega16U2__) || \ + defined(__AVR_ATmega32U2__)) + #define USB_PLL_PSC (1 << PLLP0) + #elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) + #define USB_PLL_PSC (1 << PINDIV) + #elif (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)) + #define USB_PLL_PSC ((1 << PLLP2) | (1 << PLLP1)) + #elif (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)) + #define USB_PLL_PSC ((1 << PLLP2) | (1 << PLLP0)) + #endif + #endif + + #if !defined(USB_PLL_PSC) + #error No PLL prescale value available for chosen F_USB value and AVR model. + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** \name USB Controller Option Masks */ + //@{ + /** Regulator disable option mask for \ref USB_Init(). This indicates that the internal 3.3V USB data pad + * regulator should be disabled and the AVR's VCC level used for the data pads. + * + * \note See USB AVR data sheet for more information on the internal pad regulator. + */ + #define USB_OPT_REG_DISABLED (1 << 1) + + /** Regulator enable option mask for \ref USB_Init(). This indicates that the internal 3.3V USB data pad + * regulator should be enabled to regulate the data pin voltages from the VBUS level down to a level within + * the range allowable by the USB standard. + * + * \note See USB AVR data sheet for more information on the internal pad regulator. + */ + #define USB_OPT_REG_ENABLED (0 << 1) + + /** Option mask for \ref USB_Init() to keep regulator enabled at all times. Indicates that \ref USB_Disable() + * should not disable the regulator as it would otherwise. Has no effect if regulator is disabled using + * \ref USB_OPT_REG_DISABLED. + * + * \note See USB AVR data sheet for more information on the internal pad regulator. + */ + #define USB_OPT_REG_KEEP_ENABLED (1 << 3) + + /** Manual PLL control option mask for \ref USB_Init(). This indicates to the library that the user application + * will take full responsibility for controlling the AVR's PLL (used to generate the high frequency clock + * that the USB controller requires) and ensuring that it is locked at the correct frequency for USB operations. + */ + #define USB_OPT_MANUAL_PLL (1 << 2) + + /** Automatic PLL control option mask for \ref USB_Init(). This indicates to the library that the library should + * take full responsibility for controlling the AVR's PLL (used to generate the high frequency clock + * that the USB controller requires) and ensuring that it is locked at the correct frequency for USB operations. + */ + #define USB_OPT_AUTO_PLL (0 << 2) + //@} + + #if !defined(USB_STREAM_TIMEOUT_MS) || defined(__DOXYGEN__) + /** Constant for the maximum software timeout period of the USB data stream transfer functions + * (both control and standard) when in either device or host mode. If the next packet of a stream + * is not received or acknowledged within this time period, the stream function will fail. + * + * This value may be overridden in the user project makefile as the value of the + * \ref USB_STREAM_TIMEOUT_MS token, and passed to the compiler using the -D switch. + */ + #define USB_STREAM_TIMEOUT_MS 100 + #endif + + /* Inline Functions: */ + #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) || defined(__DOXYGEN__) + /** Determines if the VBUS line is currently high (i.e. the USB host is supplying power). + * + * \note This function is not available on some AVR models which do not support hardware VBUS monitoring. + * + * \return Boolean \c true if the VBUS line is currently detecting power from a host, \c false otherwise. + */ + static inline bool USB_VBUS_GetStatus(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline bool USB_VBUS_GetStatus(void) + { + return ((USBSTA & (1 << VBUS)) ? true : false); + } + #endif + + /** Detaches the device from the USB bus. This has the effect of removing the device from any + * attached host, ceasing USB communications. If no host is present, this prevents any host from + * enumerating the device once attached until \ref USB_Attach() is called. + */ + static inline void USB_Detach(void) ATTR_ALWAYS_INLINE; + static inline void USB_Detach(void) + { + UDCON |= (1 << DETACH); + } + + /** Attaches the device to the USB bus. This announces the device's presence to any attached + * USB host, starting the enumeration process. If no host is present, attaching the device + * will allow for enumeration once a host is connected to the device. + * + * This is inexplicably also required for proper operation while in host mode, to enable the + * attachment of a device to the host. This is despite the bit being located in the device-mode + * register and despite the datasheet making no mention of its requirement in host mode. + */ + static inline void USB_Attach(void) ATTR_ALWAYS_INLINE; + static inline void USB_Attach(void) + { + UDCON &= ~(1 << DETACH); + } + + /* Function Prototypes: */ + /** Main function to initialize and start the USB interface. Once active, the USB interface will + * allow for device connection to a host when in device mode, or for device enumeration while in + * host mode. + * + * As the USB library relies on interrupts for the device and host mode enumeration processes, + * the user must enable global interrupts before or shortly after this function is called. In + * device mode, interrupts must be enabled within 500ms of this function being called to ensure + * that the host does not time out whilst enumerating the device. In host mode, interrupts may be + * enabled at the application's leisure however enumeration will not begin of an attached device + * until after this has occurred. + * + * Calling this function when the USB interface is already initialized will cause a complete USB + * interface reset and re-enumeration. + * + * \param[in] Mode Mask indicating what mode the USB interface is to be initialized to, a value + * from the \ref USB_Modes_t enum. + * \note This parameter does not exist on devices with only one supported USB + * mode (device or host). + * + * \param[in] Options Mask indicating the options which should be used when initializing the USB + * interface to control the USB interface's behavior. This should be comprised of + * a \c USB_OPT_REG_* mask to control the regulator, a \c USB_OPT_*_PLL mask to control the + * PLL, and a \c USB_DEVICE_OPT_* mask (when the device mode is enabled) to set the device + * mode speed. + * + * \note To reduce the FLASH requirements of the library if only device or host mode is required, + * the mode can be statically set in the project makefile by defining the token \c USB_DEVICE_ONLY + * (for device mode) or \c USB_HOST_ONLY (for host mode), passing the token to the compiler + * via the -D switch. If the mode is statically set, this parameter does not exist in the + * function prototype. + * \n\n + * + * \note To reduce the FLASH requirements of the library if only fixed settings are required, + * the options may be set statically in the same manner as the mode (see the Mode parameter of + * this function). To statically set the USB options, pass in the \c USE_STATIC_OPTIONS token, + * defined to the appropriate options masks. When the options are statically set, this + * parameter does not exist in the function prototype. + * \n\n + * + * \note The mode parameter does not exist on devices where only one mode is possible, such as USB + * AVR models which only implement the USB device mode in hardware. + * + * \see \ref Group_Device for the \c USB_DEVICE_OPT_* masks. + */ + void USB_Init( + #if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__) + const uint8_t Mode + #endif + + #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS)) || defined(__DOXYGEN__) + , + #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS)) + void + #endif + + #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__) + const uint8_t Options + #endif + ); + + /** Shuts down the USB interface. This turns off the USB interface after deallocating all USB FIFO + * memory, endpoints and pipes. When turned off, no USB functionality can be used until the interface + * is restarted with the \ref USB_Init() function. + */ + void USB_Disable(void); + + /** Resets the interface, when already initialized. This will re-enumerate the device if already connected + * to a host, or re-enumerate an already attached device when in host mode. + */ + void USB_ResetInterface(void); + + /* Global Variables: */ + #if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__) + /** Indicates the mode that the USB interface is currently initialized to, a value from the + * \ref USB_Modes_t enum. + * + * \attention This variable should be treated as read-only in the user application, and never manually + * changed in value. + * + * \note When the controller is initialized into UID auto-detection mode, this variable will hold the + * currently selected USB mode (i.e. \ref USB_MODE_Device or \ref USB_MODE_Host). If the controller + * is fixed into a specific mode (either through the \c USB_DEVICE_ONLY or \c USB_HOST_ONLY compile time + * options, or a limitation of the USB controller in the chosen device model) this will evaluate to + * a constant of the appropriate value and will never evaluate to \ref USB_MODE_None even when the + * USB interface is not initialized. + */ + extern volatile uint8_t USB_CurrentMode; + #elif defined(USB_CAN_BE_HOST) + #define USB_CurrentMode USB_MODE_Host + #elif defined(USB_CAN_BE_DEVICE) + #define USB_CurrentMode USB_MODE_Device + #endif + + #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__) + /** Indicates the current USB options that the USB interface was initialized with when \ref USB_Init() + * was called. This value will be one of the \c USB_MODE_* masks defined elsewhere in this module. + * + * \attention This variable should be treated as read-only in the user application, and never manually + * changed in value. + */ + extern volatile uint8_t USB_Options; + #elif defined(USE_STATIC_OPTIONS) + #define USB_Options USE_STATIC_OPTIONS + #endif + + /* Private Interface - For use in library only: */ + #if !defined(__DOXYGEN__) + /* Function Prototypes: */ + #if defined(__INCLUDE_FROM_USB_CONTROLLER_C) + #if defined(USB_CAN_BE_DEVICE) + static void USB_Init_Device(void); + #endif + + #if defined(USB_CAN_BE_HOST) + static void USB_Init_Host(void); + #endif + #endif + + /* Inline Functions: */ + static inline void USB_PLL_On(void) ATTR_ALWAYS_INLINE; + static inline void USB_PLL_On(void) + { + PLLCSR = USB_PLL_PSC; + PLLCSR = (USB_PLL_PSC | (1 << PLLE)); + } + + static inline void USB_PLL_Off(void) ATTR_ALWAYS_INLINE; + static inline void USB_PLL_Off(void) + { + PLLCSR = 0; + } + + static inline bool USB_PLL_IsReady(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline bool USB_PLL_IsReady(void) + { + return ((PLLCSR & (1 << PLOCK)) ? true : false); + } + + static inline void USB_REG_On(void) ATTR_ALWAYS_INLINE; + static inline void USB_REG_On(void) + { + #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) + UHWCON |= (1 << UVREGE); + #else + REGCR &= ~(1 << REGDIS); + #endif + } + + static inline void USB_REG_Off(void) ATTR_ALWAYS_INLINE; + static inline void USB_REG_Off(void) + { + #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) + UHWCON &= ~(1 << UVREGE); + #else + REGCR |= (1 << REGDIS); + #endif + } + + #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) + static inline void USB_OTGPAD_On(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTGPAD_On(void) + { + USBCON |= (1 << OTGPADE); + } + + static inline void USB_OTGPAD_Off(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTGPAD_Off(void) + { + USBCON &= ~(1 << OTGPADE); + } + #endif + + static inline void USB_CLK_Freeze(void) ATTR_ALWAYS_INLINE; + static inline void USB_CLK_Freeze(void) + { + USBCON |= (1 << FRZCLK); + } + + static inline void USB_CLK_Unfreeze(void) ATTR_ALWAYS_INLINE; + static inline void USB_CLK_Unfreeze(void) + { + USBCON &= ~(1 << FRZCLK); + } + + static inline void USB_Controller_Enable(void) ATTR_ALWAYS_INLINE; + static inline void USB_Controller_Enable(void) + { + USBCON |= (1 << USBE); + } + + static inline void USB_Controller_Disable(void) ATTR_ALWAYS_INLINE; + static inline void USB_Controller_Disable(void) + { + USBCON &= ~(1 << USBE); + } + + static inline void USB_Controller_Reset(void) ATTR_ALWAYS_INLINE; + static inline void USB_Controller_Reset(void) + { + USBCON &= ~(1 << USBE); + USBCON |= (1 << USBE); + } + + #if defined(USB_CAN_BE_BOTH) + static inline uint8_t USB_GetUSBModeFromUID(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline uint8_t USB_GetUSBModeFromUID(void) + { + if (USBSTA & (1 << ID)) + return USB_MODE_Device; + else + return USB_MODE_Host; + } + #endif + + #endif + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ + |