+++ /dev/null
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 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 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.
-*/
-
-/** \file
- * \brief USB low level USB controller definitions.
- *
- * This file contains structures, function prototypes and macros related to the low level configuration of the
- * USB controller, to start, stop and reset the USB library core.
- *
- * \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_USB
- * \defgroup Group_USBManagement USB Interface Management
- *
- * Functions, macros, variables, enums and types related to the setup and management of the USB interface.
- *
- * @{
- */
-
-#ifndef __USBCONTROLLER_H__
-#define __USBCONTROLLER_H__
-
- /* Includes: */
- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include <stdbool.h>
-
- #include "../HighLevel/USBMode.h"
-
- #include "../../../Common/Common.h"
- #include "../HighLevel/USBMode.h"
- #include "../HighLevel/Events.h"
- #include "../HighLevel/USBTask.h"
- #include "USBInterrupt.h"
-
- #if defined(USB_CAN_BE_HOST) || defined(__DOXYGEN__)
- #include "Host.h"
- #include "OTG.h"
- #include "Pipe.h"
- #include "../HighLevel/HostStandardReq.h"
- #include "../HighLevel/PipeStream.h"
- #endif
-
- #if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__)
- #include "Device.h"
- #include "Endpoint.h"
- #include "../HighLevel/DeviceStandardReq.h"
- #include "../HighLevel/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_CLOCK)
- #error F_CLOCK is not defined. You must define F_CLOCK to the frequency of the unprescaled input clock in your project makefile.
- #endif
-
- #if (F_CLOCK == 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__) || defined(__AVR_ATmega32U6__))
- #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_CLOCK == 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__) || defined(__AVR_ATmega32U6__))
- #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_CLOCK 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 enabled to regulate the data pin voltages to within the USB standard.
- *
- * \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 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_ENABLED (0 << 1)
-
- /** 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)
- //@}
-
- /** \name Endpoint/Pipe Type Masks */
- //@{
- /** Mask for a CONTROL type endpoint or pipe.
- *
- * \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
- */
- #define EP_TYPE_CONTROL 0x00
-
- /** Mask for an ISOCHRONOUS type endpoint or pipe.
- *
- * \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
- */
- #define EP_TYPE_ISOCHRONOUS 0x01
-
- /** Mask for a BULK type endpoint or pipe.
- *
- * \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
- */
- #define EP_TYPE_BULK 0x02
-
- /** Mask for an INTERRUPT type endpoint or pipe.
- *
- * \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
- */
- #define EP_TYPE_INTERRUPT 0x03
- //@}
-
- #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 This is a mask indicating what mode the USB interface is to be initialized to, a value
- * from the \ref USB_Modes_t enum.
- *
- * \param[in] Options Mask indicating the options which should be used when initializing the USB
- * interface to control the USB interface's behaviour. 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 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_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
- /** Indicates the mode that the USB interface is currently initialized to, a value from the
- * \ref USB_Modes_t enum.
- *
- * \note This variable should be treated as read-only in the user application, and never manually
- * changed in value.
- * \n\n
- *
- * \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_HOST_ONLY)
- #define USB_CurrentMode USB_MODE_Host
- #elif defined(USB_DEVICE_ONLY)
- #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.
- *
- * \note 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
-
- /* Enums: */
- /** Enum for the possible USB controller modes, for initialization via \ref USB_Init() and indication back to the
- * user application via \ref USB_CurrentMode.
- */
- enum USB_Modes_t
- {
- USB_MODE_None = 0, /**< Indicates that the controller is currently not initialized in any specific USB mode. */
- USB_MODE_Device = 1, /**< Indicates that the controller is currently initialized in USB Device mode. */
- USB_MODE_Host = 2, /**< Indicates that the controller is currently initialized in USB Host mode. */
- USB_MODE_UID = 3, /**< Indicates that the controller should determine the USB mode from the UID pin of the
- * USB connector.
- */
- };
-
- /* 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 |= (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)
- {
- const uint8_t Temp = USBCON;
-
- USBCON = (Temp & ~(1 << USBE));
- USBCON = (Temp | (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
-
-/** @} */
-
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