LUFA/Drivers/USB/Core/UC3B/USBController_UC3B.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *  \brief USB Controller definitions for the AVR32 UC3B microcontrollers.
  33  *  \copydetails Group_USBManagement_UC3B
  34  *
  35  *  \note This file should not be included directly. It is automatically included as needed by the USB driver
  36  *        dispatch header located in LUFA/Drivers/USB/USB.h.
  37  */
  38
  39 /** \ingroup Group_USBManagement
  40  *  \defgroup Group_USBManagement_UC3B USB Interface Management (UC3B)
  41  *  \brief USB Controller definitions for the AVR32 UC3B microcontrollers.
  42  *
  43  *  Functions, macros, variables, enums and types related to the setup and management of the USB interface.
  44  *
  45  *  @{
  46  */
  47
  48 #ifndef __USBCONTROLLER_UC3B_H__
  49 #define __USBCONTROLLER_UC3B_H__
  50
  51         /* Includes: */
  52                 #include "../../../../Common/Common.h"
  53                 #include "../USBMode.h"
  54                 #include "../Events.h"
  55                 #include "../USBTask.h"
  56                 #include "../USBInterrupt.h"
  57
  58                 #if defined(USB_CAN_BE_HOST) || defined(__DOXYGEN__)
  59                         #include "../Host.h"
  60                         #include "../OTG.h"
  61                         #include "../Pipe.h"
  62                         #include "../HostStandardReq.h"
  63                         #include "../PipeStream.h"
  64                 #endif
  65
  66                 #if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__)
  67                         #include "../Device.h"
  68                         #include "../Endpoint.h"
  69                         #include "../DeviceStandardReq.h"
  70                         #include "../EndpointStream.h"
  71                 #endif
  72
  73         /* Enable C linkage for C++ Compilers: */
  74                 #if defined(__cplusplus)
  75                         extern "C" {
  76                 #endif
  77
  78         /* Preprocessor Checks and Defines: */
  79                 #if !defined(__INCLUDE_FROM_USB_DRIVER)
  80                         #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
  81                 #endif
  82
  83         /* Public Interface - May be used in end-application: */
  84                 /* Macros: */
  85                         /** \name Endpoint/Pipe Type Masks */
  86                         //@{
  87                         /** Mask for a CONTROL type endpoint or pipe.
  88                          *
  89                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
  90                          */
  91                         #define EP_TYPE_CONTROL                    0x00
  92
  93                         /** Mask for an ISOCHRONOUS type endpoint or pipe.
  94                          *
  95                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
  96                          */
  97                         #define EP_TYPE_ISOCHRONOUS                0x01
  98
  99                         /** Mask for a BULK type endpoint or pipe.
 100                          *
 101                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 102                          */
 103                         #define EP_TYPE_BULK                       0x02
 104
 105                         /** Mask for an INTERRUPT type endpoint or pipe.
 106                          *
 107                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 108                          */
 109                         #define EP_TYPE_INTERRUPT                  0x03
 110                         //@}
 111
 112                         #if !defined(USB_STREAM_TIMEOUT_MS) || defined(__DOXYGEN__)
 113                                 /** Constant for the maximum software timeout period of the USB data stream transfer functions
 114                                  *  (both control and standard) when in either device or host mode. If the next packet of a stream
 115                                  *  is not received or acknowledged within this time period, the stream function will fail.
 116                                  *
 117                                  *  This value may be overridden in the user project makefile as the value of the
 118                                  *  \ref USB_STREAM_TIMEOUT_MS token, and passed to the compiler using the -D switch.
 119                                  */
 120                                 #define USB_STREAM_TIMEOUT_MS       100
 121                         #endif
 122
 123                 /* Inline Functions: */
 124                         /** Determines if the VBUS line is currently high (i.e. the USB host is supplying power).
 125                          *
 126                          *  \return Boolean \c true if the VBUS line is currently detecting power from a host, \c false otherwise.
 127                          */
 128                         static inline bool USB_VBUS_GetStatus(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 129                         static inline bool USB_VBUS_GetStatus(void)
 130                         {
 131                                 return AVR32_USBB.USBSTA.vbus;
 132                         }
 133
 134                         /** Detaches the device from the USB bus. This has the effect of removing the device from any
 135                          *  attached host, ceasing USB communications. If no host is present, this prevents any host from
 136                          *  enumerating the device once attached until \ref USB_Attach() is called.
 137                          */
 138                         static inline void USB_Detach(void) ATTR_ALWAYS_INLINE;
 139                         static inline void USB_Detach(void)
 140                         {
 141                                 AVR32_USBB.UDCON.detach = true;
 142                         }
 143
 144                         /** Attaches the device to the USB bus. This announces the device's presence to any attached
 145                          *  USB host, starting the enumeration process. If no host is present, attaching the device
 146                          *  will allow for enumeration once a host is connected to the device.
 147                          *
 148                          *  This is inexplicably also required for proper operation while in host mode, to enable the
 149                          *  attachment of a device to the host. This is despite the bit being located in the device-mode
 150                          *  register and despite the datasheet making no mention of its requirement in host mode.
 151                          */
 152                         static inline void USB_Attach(void) ATTR_ALWAYS_INLINE;
 153                         static inline void USB_Attach(void)
 154                         {
 155                                 AVR32_USBB.UDCON.detach = false;
 156                         }
 157
 158                 /* Function Prototypes: */
 159                         /** Main function to initialize and start the USB interface. Once active, the USB interface will
 160                          *  allow for device connection to a host when in device mode, or for device enumeration while in
 161                          *  host mode.
 162                          *
 163                          *  As the USB library relies on interrupts for the device and host mode enumeration processes,
 164                          *  the user must enable global interrupts before or shortly after this function is called. In
 165                          *  device mode, interrupts must be enabled within 500ms of this function being called to ensure
 166                          *  that the host does not time out whilst enumerating the device. In host mode, interrupts may be
 167                          *  enabled at the application's leisure however enumeration will not begin of an attached device
 168                          *  until after this has occurred.
 169                          *
 170                          *  Calling this function when the USB interface is already initialized will cause a complete USB
 171                          *  interface reset and re-enumeration.
 172                          *
 173                          *  \param[in] Mode     This is a mask indicating what mode the USB interface is to be initialized to, a value
 174                          *                      from the \ref USB_Modes_t enum.
 175                          *
 176                          *  \param[in] Options  Mask indicating the options which should be used when initializing the USB
 177                          *                      interface to control the USB interface's behaviour. This should be comprised of
 178                          *                      a \c USB_OPT_REG_* mask to control the regulator, a \c USB_OPT_*_PLL mask to control the
 179                          *                      PLL, and a \c USB_DEVICE_OPT_* mask (when the device mode is enabled) to set the device
 180                          *                      mode speed.
 181                          *
 182                          *  \note To reduce the FLASH requirements of the library if only device or host mode is required,
 183                          *        the mode can be statically set in the project makefile by defining the token \c USB_DEVICE_ONLY
 184                          *        (for device mode) or \c USB_HOST_ONLY (for host mode), passing the token to the compiler
 185                          *        via the -D switch. If the mode is statically set, this parameter does not exist in the
 186                          *        function prototype.
 187                          *        \n\n
 188                          *
 189                          *  \note To reduce the FLASH requirements of the library if only fixed settings are are required,
 190                          *        the options may be set statically in the same manner as the mode (see the Mode parameter of
 191                          *        this function). To statically set the USB options, pass in the \c USE_STATIC_OPTIONS token,
 192                          *        defined to the appropriate options masks. When the options are statically set, this
 193                          *        parameter does not exist in the function prototype.
 194                          *
 195                          *  \see \ref Group_Device for the \c USB_DEVICE_OPT_* masks.
 196                          */
 197                         void USB_Init(
 198                                        #if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__)
 199                                        const uint8_t Mode
 200                                        #endif
 201
 202                                        #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS)) || defined(__DOXYGEN__)
 203                                        ,
 204                                        #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
 205                                        void
 206                                        #endif
 207
 208                                        #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__)
 209                                        const uint8_t Options
 210                                        #endif
 211                                        );
 212
 213                         /** Shuts down the USB interface. This turns off the USB interface after deallocating all USB FIFO
 214                          *  memory, endpoints and pipes. When turned off, no USB functionality can be used until the interface
 215                          *  is restarted with the \ref USB_Init() function.
 216                          */
 217                         void USB_Disable(void);
 218
 219                         /** Resets the interface, when already initialized. This will re-enumerate the device if already connected
 220                          *  to a host, or re-enumerate an already attached device when in host mode.
 221                          */
 222                         void USB_ResetInterface(void);
 223
 224                 /* Global Variables: */
 225                         #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
 226                                 /** Indicates the mode that the USB interface is currently initialized to, a value from the
 227                                  *  \ref USB_Modes_t enum.
 228                                  *
 229                                  *  \note This variable should be treated as read-only in the user application, and never manually
 230                                  *        changed in value.
 231                                  *        \n\n
 232                                  *
 233                                  *  \note When the controller is initialized into UID auto-detection mode, this variable will hold the
 234                                  *        currently selected USB mode (i.e. \ref USB_MODE_Device or \ref USB_MODE_Host). If the controller
 235                                  *        is fixed into a specific mode (either through the \c USB_DEVICE_ONLY or \c USB_HOST_ONLY compile time
 236                                  *        options, or a limitation of the USB controller in the chosen device model) this will evaluate to
 237                                  *        a constant of the appropriate value and will never evaluate to \ref USB_MODE_None even when the
 238                                  *        USB interface is not initialized.
 239                                  */
 240                                 extern volatile uint8_t USB_CurrentMode;
 241                         #elif defined(USB_HOST_ONLY)
 242                                 #define USB_CurrentMode USB_MODE_Host
 243                         #elif defined(USB_DEVICE_ONLY)
 244                                 #define USB_CurrentMode USB_MODE_Device
 245                         #endif
 246
 247                         #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__)
 248                                 /** Indicates the current USB options that the USB interface was initialized with when \ref USB_Init()
 249                                  *  was called. This value will be one of the \c USB_MODE_* masks defined elsewhere in this module.
 250                                  *
 251                                  *  \note This variable should be treated as read-only in the user application, and never manually
 252                                  *        changed in value.
 253                                  */
 254                                 extern volatile uint8_t USB_Options;
 255                         #elif defined(USE_STATIC_OPTIONS)
 256                                 #define USB_Options USE_STATIC_OPTIONS
 257                         #endif
 258
 259                 /* Enums: */
 260                         /** Enum for the possible USB controller modes, for initialization via \ref USB_Init() and indication back to the
 261                          *  user application via \ref USB_CurrentMode.
 262                          */
 263                         enum USB_Modes_t
 264                         {
 265                                 USB_MODE_None   = 0, /**< Indicates that the controller is currently not initialized in any specific USB mode. */
 266                                 USB_MODE_Device = 1, /**< Indicates that the controller is currently initialized in USB Device mode. */
 267                                 USB_MODE_Host   = 2, /**< Indicates that the controller is currently initialized in USB Host mode. */
 268                                 USB_MODE_UID    = 3, /**< Indicates that the controller should determine the USB mode from the UID pin of the
 269                                                       *   USB connector.
 270                                                       */
 271                         };
 272
 273         /* Private Interface - For use in library only: */
 274         #if !defined(__DOXYGEN__)
 275                 /* Function Prototypes: */
 276                         #if defined(__INCLUDE_FROM_USB_CONTROLLER_C)
 277                                 #if defined(USB_CAN_BE_DEVICE)
 278                                 static void USB_Init_Device(void);
 279                                 #endif
 280
 281                                 #if defined(USB_CAN_BE_HOST)
 282                                 static void USB_Init_Host(void);
 283                                 #endif
 284                         #endif
 285
 286                 /* Inline Functions: */
 287                         static inline void USB_OTGPAD_On(void) ATTR_ALWAYS_INLINE;
 288                         static inline void USB_OTGPAD_On(void)
 289                         {
 290                                 AVR32_USBB.USBCON.otgpade = true;
 291                         }
 292
 293                         static inline void USB_OTGPAD_Off(void) ATTR_ALWAYS_INLINE;
 294                         static inline void USB_OTGPAD_Off(void)
 295                         {
 296                                 AVR32_USBB.USBCON.otgpade = false;
 297                         }
 298
 299                         static inline void USB_CLK_Freeze(void) ATTR_ALWAYS_INLINE;
 300                         static inline void USB_CLK_Freeze(void)
 301                         {
 302                                 AVR32_USBB.USBCON.frzclk = true;
 303                         }
 304
 305                         static inline void USB_CLK_Unfreeze(void) ATTR_ALWAYS_INLINE;
 306                         static inline void USB_CLK_Unfreeze(void)
 307                         {
 308                                 AVR32_USBB.USBCON.frzclk = false;
 309                         }
 310
 311                         static inline void USB_Controller_Enable(void) ATTR_ALWAYS_INLINE;
 312                         static inline void USB_Controller_Enable(void)
 313                         {
 314                                 AVR32_USBB.USBCON.usbe = true;
 315                         }
 316
 317                         static inline void USB_Controller_Disable(void) ATTR_ALWAYS_INLINE;
 318                         static inline void USB_Controller_Disable(void)
 319                         {
 320                                 AVR32_USBB.USBCON.usbe = false;
 321                         }
 322
 323                         static inline void USB_Controller_Reset(void) ATTR_ALWAYS_INLINE;
 324                         static inline void USB_Controller_Reset(void)
 325                         {
 326                                 AVR32_USBB.USBCON.usbe = false;
 327                                 AVR32_USBB.USBCON.usbe = true;
 328                         }
 329
 330                         #if defined(USB_CAN_BE_BOTH)
 331                         static inline uint8_t USB_GetUSBModeFromUID(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 332                         static inline uint8_t USB_GetUSBModeFromUID(void)
 333                         {
 334                                 if (AVR32_USBB.USBSTA.id)
 335                                   return USB_MODE_Device;
 336                                 else
 337                                   return USB_MODE_Host;
 338                         }
 339                         #endif
 340
 341         #endif
 342
 343         /* Disable C linkage for C++ Compilers: */
 344                 #if defined(__cplusplus)
 345                         }
 346                 #endif
 347
 348 #endif
 349
 350 /** @} */
 351