LUFA/Drivers/USB/Core/UC3/USBController_UC3.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 UC3 microcontrollers.
  33  *  \copydetails Group_USBManagement_UC3
  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_UC3 USB Interface Management (UC3)
  41  *  \brief USB Controller definitions for the AVR32 UC3 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_UC3_H__
  49 #define __USBCONTROLLER_UC3_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 USB Controller Option Masks */
  86                         //@{
  87                         /** Selects one of the system's main clock oscillators as the input clock to the USB Generic Clock source
  88                          *  generation module. This indicates that an external oscillator should be used directly instead of an
  89                          *  internal PLL clock source.
  90                          */
  91                         #define USB_OPT_GCLK_SRC_OSC               (1 << 1)
  92
  93                         /** Selects one of the system's PLL oscillators as the input clock to the USB Generic Clock source
  94                          *  generation module. This indicates that one of the device's PLL outputs should be used instead of an
  95                          *  external oscillator source.
  96                          */
  97                         #define USB_OPT_GCLK_SRC_PLL               (0 << 1)
  98
  99                         /** Selects PLL or External Oscillator 0 as the USB Generic Clock source module input clock. */
 100                         #define USB_OPT_GCLK_CHANNEL_0             (1 << 2)
 101
 102                         /** Selects PLL or External Oscillator 1 as the USB Generic Clock source module input clock. */
 103                         #define USB_OPT_GCLK_CHANNEL_1             (0 << 2)
 104                         //@}
 105
 106                         /** \name Endpoint/Pipe Type Masks */
 107                         //@{
 108                         /** Mask for a CONTROL type endpoint or pipe.
 109                          *
 110                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 111                          */
 112                         #define EP_TYPE_CONTROL                    0x00
 113
 114                         /** Mask for an ISOCHRONOUS type endpoint or pipe.
 115                          *
 116                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 117                          */
 118                         #define EP_TYPE_ISOCHRONOUS                0x01
 119
 120                         /** Mask for a BULK type endpoint or pipe.
 121                          *
 122                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 123                          */
 124                         #define EP_TYPE_BULK                       0x02
 125
 126                         /** Mask for an INTERRUPT type endpoint or pipe.
 127                          *
 128                          *  \note See \ref Group_EndpointManagement and \ref Group_PipeManagement for endpoint/pipe functions.
 129                          */
 130                         #define EP_TYPE_INTERRUPT                  0x03
 131                         //@}
 132
 133                         #if !defined(USB_STREAM_TIMEOUT_MS) || defined(__DOXYGEN__)
 134                                 /** Constant for the maximum software timeout period of the USB data stream transfer functions
 135                                  *  (both control and standard) when in either device or host mode. If the next packet of a stream
 136                                  *  is not received or acknowledged within this time period, the stream function will fail.
 137                                  *
 138                                  *  This value may be overridden in the user project makefile as the value of the
 139                                  *  \ref USB_STREAM_TIMEOUT_MS token, and passed to the compiler using the -D switch.
 140                                  */
 141                                 #define USB_STREAM_TIMEOUT_MS       100
 142                         #endif
 143
 144                 /* Inline Functions: */
 145                         /** Determines if the VBUS line is currently high (i.e. the USB host is supplying power).
 146                          *
 147                          *  \return Boolean \c true if the VBUS line is currently detecting power from a host, \c false otherwise.
 148                          */
 149                         static inline bool USB_VBUS_GetStatus(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 150                         static inline bool USB_VBUS_GetStatus(void)
 151                         {
 152                                 return AVR32_USBB.USBSTA.vbus;
 153                         }
 154
 155                         /** Detaches the device from the USB bus. This has the effect of removing the device from any
 156                          *  attached host, ceasing USB communications. If no host is present, this prevents any host from
 157                          *  enumerating the device once attached until \ref USB_Attach() is called.
 158                          */
 159                         static inline void USB_Detach(void) ATTR_ALWAYS_INLINE;
 160                         static inline void USB_Detach(void)
 161                         {
 162                                 AVR32_USBB.UDCON.detach = true;
 163                         }
 164
 165                         /** Attaches the device to the USB bus. This announces the device's presence to any attached
 166                          *  USB host, starting the enumeration process. If no host is present, attaching the device
 167                          *  will allow for enumeration once a host is connected to the device.
 168                          *
 169                          *  This is inexplicably also required for proper operation while in host mode, to enable the
 170                          *  attachment of a device to the host. This is despite the bit being located in the device-mode
 171                          *  register and despite the datasheet making no mention of its requirement in host mode.
 172                          */
 173                         static inline void USB_Attach(void) ATTR_ALWAYS_INLINE;
 174                         static inline void USB_Attach(void)
 175                         {
 176                                 AVR32_USBB.UDCON.detach = false;
 177                         }
 178
 179                 /* Function Prototypes: */
 180                         /** Main function to initialize and start the USB interface. Once active, the USB interface will
 181                          *  allow for device connection to a host when in device mode, or for device enumeration while in
 182                          *  host mode.
 183                          *
 184                          *  As the USB library relies on interrupts for the device and host mode enumeration processes,
 185                          *  the user must enable global interrupts before or shortly after this function is called. In
 186                          *  device mode, interrupts must be enabled within 500ms of this function being called to ensure
 187                          *  that the host does not time out whilst enumerating the device. In host mode, interrupts may be
 188                          *  enabled at the application's leisure however enumeration will not begin of an attached device
 189                          *  until after this has occurred.
 190                          *
 191                          *  Calling this function when the USB interface is already initialized will cause a complete USB
 192                          *  interface reset and re-enumeration.
 193                          *
 194                          *  \param[in] Mode     This is a mask indicating what mode the USB interface is to be initialized to, a value
 195                          *                      from the \ref USB_Modes_t enum.
 196                          *
 197                          *  \param[in] Options  Mask indicating the options which should be used when initializing the USB
 198                          *                      interface to control the USB interface's behaviour. This should be comprised of
 199                          *                      a \c USB_OPT_REG_* mask to control the regulator, a \c USB_OPT_*_PLL mask to control the
 200                          *                      PLL, and a \c USB_DEVICE_OPT_* mask (when the device mode is enabled) to set the device
 201                          *                      mode speed.
 202                          *
 203                          *  \note To reduce the FLASH requirements of the library if only device or host mode is required,
 204                          *        the mode can be statically set in the project makefile by defining the token \c USB_DEVICE_ONLY
 205                          *        (for device mode) or \c USB_HOST_ONLY (for host mode), passing the token to the compiler
 206                          *        via the -D switch. If the mode is statically set, this parameter does not exist in the
 207                          *        function prototype.
 208                          *        \n\n
 209                          *
 210                          *  \note To reduce the FLASH requirements of the library if only fixed settings are are required,
 211                          *        the options may be set statically in the same manner as the mode (see the Mode parameter of
 212                          *        this function). To statically set the USB options, pass in the \c USE_STATIC_OPTIONS token,
 213                          *        defined to the appropriate options masks. When the options are statically set, this
 214                          *        parameter does not exist in the function prototype.
 215                          *
 216                          *  \see \ref Group_Device for the \c USB_DEVICE_OPT_* masks.
 217                          */
 218                         void USB_Init(
 219                                        #if defined(USB_CAN_BE_BOTH) || defined(__DOXYGEN__)
 220                                        const uint8_t Mode
 221                                        #endif
 222
 223                                        #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS)) || defined(__DOXYGEN__)
 224                                        ,
 225                                        #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
 226                                        void
 227                                        #endif
 228
 229                                        #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__)
 230                                        const uint8_t Options
 231                                        #endif
 232                                        );
 233
 234                         /** Shuts down the USB interface. This turns off the USB interface after deallocating all USB FIFO
 235                          *  memory, endpoints and pipes. When turned off, no USB functionality can be used until the interface
 236                          *  is restarted with the \ref USB_Init() function.
 237                          */
 238                         void USB_Disable(void);
 239
 240                         /** Resets the interface, when already initialized. This will re-enumerate the device if already connected
 241                          *  to a host, or re-enumerate an already attached device when in host mode.
 242                          */
 243                         void USB_ResetInterface(void);
 244
 245                 /* Global Variables: */
 246                         #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY)) || defined(__DOXYGEN__)
 247                                 /** Indicates the mode that the USB interface is currently initialized to, a value from the
 248                                  *  \ref USB_Modes_t enum.
 249                                  *
 250                                  *  \note This variable should be treated as read-only in the user application, and never manually
 251                                  *        changed in value.
 252                                  *        \n\n
 253                                  *
 254                                  *  \note When the controller is initialized into UID auto-detection mode, this variable will hold the
 255                                  *        currently selected USB mode (i.e. \ref USB_MODE_Device or \ref USB_MODE_Host). If the controller
 256                                  *        is fixed into a specific mode (either through the \c USB_DEVICE_ONLY or \c USB_HOST_ONLY compile time
 257                                  *        options, or a limitation of the USB controller in the chosen device model) this will evaluate to
 258                                  *        a constant of the appropriate value and will never evaluate to \ref USB_MODE_None even when the
 259                                  *        USB interface is not initialized.
 260                                  */
 261                                 extern volatile uint8_t USB_CurrentMode;
 262                         #elif defined(USB_HOST_ONLY)
 263                                 #define USB_CurrentMode USB_MODE_Host
 264                         #elif defined(USB_DEVICE_ONLY)
 265                                 #define USB_CurrentMode USB_MODE_Device
 266                         #endif
 267
 268                         #if !defined(USE_STATIC_OPTIONS) || defined(__DOXYGEN__)
 269                                 /** Indicates the current USB options that the USB interface was initialized with when \ref USB_Init()
 270                                  *  was called. This value will be one of the \c USB_MODE_* masks defined elsewhere in this module.
 271                                  *
 272                                  *  \note This variable should be treated as read-only in the user application, and never manually
 273                                  *        changed in value.
 274                                  */
 275                                 extern volatile uint8_t USB_Options;
 276                         #elif defined(USE_STATIC_OPTIONS)
 277                                 #define USB_Options USE_STATIC_OPTIONS
 278                         #endif
 279
 280                 /* Enums: */
 281                         /** Enum for the possible USB controller modes, for initialization via \ref USB_Init() and indication back to the
 282                          *  user application via \ref USB_CurrentMode.
 283                          */
 284                         enum USB_Modes_t
 285                         {
 286                                 USB_MODE_None   = 0, /**< Indicates that the controller is currently not initialized in any specific USB mode. */
 287                                 USB_MODE_Device = 1, /**< Indicates that the controller is currently initialized in USB Device mode. */
 288                                 USB_MODE_Host   = 2, /**< Indicates that the controller is currently initialized in USB Host mode. */
 289                                 USB_MODE_UID    = 3, /**< Indicates that the controller should determine the USB mode from the UID pin of the
 290                                                       *   USB connector.
 291                                                       */
 292                         };
 293
 294         /* Private Interface - For use in library only: */
 295         #if !defined(__DOXYGEN__)
 296                 /* Macros: */
 297                         #if (defined(USB_SERIES_UC3A3_AVR) || defined(USB_SERIES_UC3A4_AVR))
 298                                 #define USB_CLOCK_REQUIRED_FREQ  12000000UL
 299                         #else
 300                                 #define USB_CLOCK_REQUIRED_FREQ  48000000UL
 301                         #endif
 302
 303                 /* Function Prototypes: */
 304                         #if defined(__INCLUDE_FROM_USB_CONTROLLER_C)
 305                                 #if defined(USB_CAN_BE_DEVICE)
 306                                 static void USB_Init_Device(void);
 307                                 #endif
 308
 309                                 #if defined(USB_CAN_BE_HOST)
 310                                 static void USB_Init_Host(void);
 311                                 #endif
 312                         #endif
 313
 314                 /* Inline Functions: */
 315                         static inline void USB_OTGPAD_On(void) ATTR_ALWAYS_INLINE;
 316                         static inline void USB_OTGPAD_On(void)
 317                         {
 318                                 AVR32_USBB.USBCON.otgpade = true;
 319                         }
 320
 321                         static inline void USB_OTGPAD_Off(void) ATTR_ALWAYS_INLINE;
 322                         static inline void USB_OTGPAD_Off(void)
 323                         {
 324                                 AVR32_USBB.USBCON.otgpade = false;
 325                         }
 326
 327                         static inline void USB_CLK_Freeze(void) ATTR_ALWAYS_INLINE;
 328                         static inline void USB_CLK_Freeze(void)
 329                         {
 330                                 AVR32_USBB.USBCON.frzclk = true;
 331                         }
 332
 333                         static inline void USB_CLK_Unfreeze(void) ATTR_ALWAYS_INLINE;
 334                         static inline void USB_CLK_Unfreeze(void)
 335                         {
 336                                 AVR32_USBB.USBCON.frzclk = false;
 337                         }
 338
 339                         static inline void USB_Controller_Enable(void) ATTR_ALWAYS_INLINE;
 340                         static inline void USB_Controller_Enable(void)
 341                         {
 342                                 AVR32_USBB.USBCON.usbe = true;
 343                         }
 344
 345                         static inline void USB_Controller_Disable(void) ATTR_ALWAYS_INLINE;
 346                         static inline void USB_Controller_Disable(void)
 347                         {
 348                                 AVR32_USBB.USBCON.usbe = false;
 349                         }
 350
 351                         static inline void USB_Controller_Reset(void) ATTR_ALWAYS_INLINE;
 352                         static inline void USB_Controller_Reset(void)
 353                         {
 354                                 AVR32_USBB.USBCON.usbe = false;
 355                                 AVR32_USBB.USBCON.usbe = true;
 356                         }
 357
 358                         #if defined(USB_CAN_BE_BOTH)
 359                         static inline uint8_t USB_GetUSBModeFromUID(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 360                         static inline uint8_t USB_GetUSBModeFromUID(void)
 361                         {
 362                                 if (AVR32_USBB.USBSTA.id)
 363                                   return USB_MODE_Device;
 364                                 else
 365                                   return USB_MODE_Host;
 366                         }
 367                         #endif
 368
 369         #endif
 370
 371         /* Disable C linkage for C++ Compilers: */
 372                 #if defined(__cplusplus)
 373                         }
 374                 #endif
 375
 376 #endif
 377
 378 /** @} */
 379