LUFA/Drivers/USB/Core/AVR8/Host_AVR8.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 Host definitions for the AVR8 microcontrollers.
  33  *  \copydetails Group_Host_AVR8
  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_Host
  40  *  \defgroup Group_Host_AVR8 Host Management (AVR8)
  41  *  \brief USB Host definitions for the AVR8 microcontrollers.
  42  *
  43  *  Architecture specific USB Host definitions for the Atmel 8-bit AVR microcontrollers.
  44  *
  45  *  @{
  46  */
  47
  48 #ifndef __USBHOST_AVR8_H__
  49 #define __USBHOST_AVR8_H__
  50
  51         /* Includes: */
  52                 #include "../../../../Common/Common.h"
  53                 #include "../StdDescriptors.h"
  54                 #include "../Pipe.h"
  55                 #include "../USBInterrupt.h"
  56
  57         /* Enable C linkage for C++ Compilers: */
  58                 #if defined(__cplusplus)
  59                         extern "C" {
  60                 #endif
  61
  62         /* Preprocessor Checks: */
  63                 #if !defined(__INCLUDE_FROM_USB_DRIVER)
  64                         #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
  65                 #endif
  66
  67         /* Public Interface - May be used in end-application: */
  68                 /* Macros: */
  69                         /** Indicates the fixed USB device address which any attached device is enumerated to when in
  70                          *  host mode. As only one USB device may be attached to the AVR in host mode at any one time
  71                          *  and that the address used is not important (other than the fact that it is non-zero), a
  72                          *  fixed value is specified by the library.
  73                          */
  74                         #define USB_HOST_DEVICEADDRESS                 1
  75
  76                         #if !defined(HOST_DEVICE_SETTLE_DELAY_MS) || defined(__DOXYGEN__)
  77                                 /** Constant for the delay in milliseconds after a device is connected before the library
  78                                  *  will start the enumeration process. Some devices require a delay of up to 5 seconds
  79                                  *  after connection before the enumeration process can start or incorrect operation will
  80                                  *  occur.
  81                                  *
  82                                  *  The default delay value may be overridden in the user project makefile by defining the
  83                                  *  \c HOST_DEVICE_SETTLE_DELAY_MS token to the required delay in milliseconds, and passed to the
  84                                  *  compiler using the -D switch.
  85                                  */
  86                                 #define HOST_DEVICE_SETTLE_DELAY_MS        1000
  87                         #endif
  88
  89                         /** Enum for the error codes for the \ref EVENT_USB_Host_HostError() event.
  90                          *
  91                          *  \see \ref Group_Events for more information on this event.
  92                          */
  93                         enum USB_Host_ErrorCodes_t
  94                         {
  95                                 HOST_ERROR_VBusVoltageDip       = 0, /**< VBUS voltage dipped to an unacceptable level. This
  96                                                                       *   error may be the result of an attached device drawing
  97                                                                       *   too much current from the VBUS line, or due to the
  98                                                                       *   AVR's power source being unable to supply sufficient
  99                                                                       *   current.
 100                                                                       */
 101                         };
 102
 103                         /** Enum for the error codes for the \ref EVENT_USB_Host_DeviceEnumerationFailed() event.
 104                          *
 105                          *  \see \ref Group_Events for more information on this event.
 106                          */
 107                         enum USB_Host_EnumerationErrorCodes_t
 108                         {
 109                                 HOST_ENUMERROR_NoError          = 0, /**< No error occurred. Used internally, this is not a valid
 110                                                                       *   ErrorCode parameter value for the \ref EVENT_USB_Host_DeviceEnumerationFailed()
 111                                                                       *   event.
 112                                                                       */
 113                                 HOST_ENUMERROR_WaitStage        = 1, /**< One of the delays between enumeration steps failed
 114                                                                       *   to complete successfully, due to a timeout or other
 115                                                                       *   error.
 116                                                                       */
 117                                 HOST_ENUMERROR_NoDeviceDetected = 2, /**< No device was detected, despite the USB data lines
 118                                                                       *   indicating the attachment of a device.
 119                                                                       */
 120                                 HOST_ENUMERROR_ControlError     = 3, /**< One of the enumeration control requests failed to
 121                                                                       *   complete successfully.
 122                                                                       */
 123                                 HOST_ENUMERROR_PipeConfigError  = 4, /**< The default control pipe (address 0) failed to
 124                                                                       *   configure correctly.
 125                                                                       */
 126                         };
 127
 128                 /* Inline Functions: */
 129                         /** Returns the current USB frame number, when in host mode. Every millisecond the USB bus is active (i.e. not suspended)
 130                          *  the frame number is incremented by one.
 131                          *
 132                          *  \return Current USB frame number from the USB controller.
 133                          */
 134                         static inline uint16_t USB_Host_GetFrameNumber(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 135                         static inline uint16_t USB_Host_GetFrameNumber(void)
 136                         {
 137                                 return UHFNUM;
 138                         }
 139
 140                         #if !defined(NO_SOF_EVENTS)
 141                                 /** Enables the host mode Start Of Frame events. When enabled, this causes the
 142                                  *  \ref EVENT_USB_Host_StartOfFrame() event to fire once per millisecond, synchronized to the USB bus,
 143                                  *  at the start of each USB frame when a device is enumerated while in host mode.
 144                                  *
 145                                  *  \note Not available when the \c NO_SOF_EVENTS compile time token is defined.
 146                                  */
 147                                 static inline void USB_Host_EnableSOFEvents(void) ATTR_ALWAYS_INLINE;
 148                                 static inline void USB_Host_EnableSOFEvents(void)
 149                                 {
 150                                         USB_INT_Enable(USB_INT_HSOFI);
 151                                 }
 152
 153                                 /** Disables the host mode Start Of Frame events. When disabled, this stops the firing of the
 154                                  *  \ref EVENT_USB_Host_StartOfFrame() event when enumerated in host mode.
 155                                  *
 156                                  *  \note Not available when the NO_SOF_EVENTS compile time token is defined.
 157                                  */
 158                                 static inline void USB_Host_DisableSOFEvents(void) ATTR_ALWAYS_INLINE;
 159                                 static inline void USB_Host_DisableSOFEvents(void)
 160                                 {
 161                                         USB_INT_Disable(USB_INT_HSOFI);
 162                                 }
 163                         #endif
 164
 165                         /** Resets the USB bus, including the endpoints in any attached device and pipes on the AVR host.
 166                          *  USB bus resets leave the default control pipe configured (if already configured).
 167                          *
 168                          *  If the USB bus has been suspended prior to issuing a bus reset, the attached device will be
 169                          *  woken up automatically and the bus resumed after the reset has been correctly issued.
 170                          */
 171                         static inline void USB_Host_ResetBus(void) ATTR_ALWAYS_INLINE;
 172                         static inline void USB_Host_ResetBus(void)
 173                         {
 174                                 UHCON |=  (1 << RESET);
 175                         }
 176
 177                         /** Determines if a previously issued bus reset (via the \ref USB_Host_ResetBus() macro) has
 178                          *  completed.
 179                          *
 180                          *  \return Boolean \c true if no bus reset is currently being sent, \c false otherwise.
 181                          */
 182                         static inline bool USB_Host_IsBusResetComplete(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 183                         static inline bool USB_Host_IsBusResetComplete(void)
 184                         {
 185                                 return ((UHCON & (1 << RESET)) ? false : true);
 186                         }
 187
 188                         /** Resumes USB communications with an attached and enumerated device, by resuming the transmission
 189                          *  of the 1MS Start Of Frame messages to the device. When resumed, USB communications between the
 190                          *  host and attached device may occur.
 191                          */
 192                         static inline void USB_Host_ResumeBus(void) ATTR_ALWAYS_INLINE;
 193                         static inline void USB_Host_ResumeBus(void)
 194                         {
 195                                 UHCON |=  (1 << SOFEN);
 196                         }
 197
 198                         /** Suspends the USB bus, preventing any communications from occurring between the host and attached
 199                          *  device until the bus has been resumed. This stops the transmission of the 1MS Start Of Frame
 200                          *  messages to the device.
 201                          *
 202                          *  \note While the USB bus is suspended, all USB interrupt sources are also disabled; this means that
 203                          *        some events (such as device disconnections) will not fire until the bus is resumed.
 204                          */
 205                         static inline void USB_Host_SuspendBus(void) ATTR_ALWAYS_INLINE;
 206                         static inline void USB_Host_SuspendBus(void)
 207                         {
 208                                 UHCON &= ~(1 << SOFEN);
 209                         }
 210
 211                         /** Determines if the USB bus has been suspended via the use of the \ref USB_Host_SuspendBus() macro,
 212                          *  false otherwise. While suspended, no USB communications can occur until the bus is resumed,
 213                          *  except for the Remote Wakeup event from the device if supported.
 214                          *
 215                          *  \return Boolean \c true if the bus is currently suspended, \c false otherwise.
 216                          */
 217                         static inline bool USB_Host_IsBusSuspended(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 218                         static inline bool USB_Host_IsBusSuspended(void)
 219                         {
 220                                 return ((UHCON & (1 << SOFEN)) ? false : true);
 221                         }
 222
 223                         /** Determines if the attached device is currently enumerated in Full Speed mode (12Mb/s), or
 224                          *  false if the attached device is enumerated in Low Speed mode (1.5Mb/s).
 225                          *
 226                          *  \return Boolean \c true if the attached device is enumerated in Full Speed mode, \c false otherwise.
 227                          */
 228                         static inline bool USB_Host_IsDeviceFullSpeed(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 229                         static inline bool USB_Host_IsDeviceFullSpeed(void)
 230                         {
 231                                 return ((USBSTA & (1 << SPEED)) ? true : false);
 232                         }
 233
 234                         /** Determines if the attached device is currently issuing a Remote Wakeup request, requesting
 235                          *  that the host resume the USB bus and wake up the device, false otherwise.
 236                          *
 237                          *  \return Boolean \c true if the attached device has sent a Remote Wakeup request, \c false otherwise.
 238                          */
 239                         static inline bool USB_Host_IsRemoteWakeupSent(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 240                         static inline bool USB_Host_IsRemoteWakeupSent(void)
 241                         {
 242                                 return ((UHINT & (1 << RXRSMI)) ? true : false);
 243                         }
 244
 245                         /** Clears the flag indicating that a Remote Wakeup request has been issued by an attached device. */
 246                         static inline void USB_Host_ClearRemoteWakeupSent(void) ATTR_ALWAYS_INLINE;
 247                         static inline void USB_Host_ClearRemoteWakeupSent(void)
 248                         {
 249                                 UHINT &= ~(1 << RXRSMI);
 250                         }
 251
 252                         /** Accepts a Remote Wakeup request from an attached device. This must be issued in response to
 253                          *  a device's Remote Wakeup request within 2ms for the request to be accepted and the bus to
 254                          *  be resumed.
 255                          */
 256                         static inline void USB_Host_ResumeFromWakeupRequest(void) ATTR_ALWAYS_INLINE;
 257                         static inline void USB_Host_ResumeFromWakeupRequest(void)
 258                         {
 259                                 UHCON |=  (1 << RESUME);
 260                         }
 261
 262                         /** Determines if a resume from Remote Wakeup request is currently being sent to an attached
 263                          *  device.
 264                          *
 265                          *  \return Boolean \c true if no resume request is currently being sent, \c false otherwise.
 266                          */
 267                         static inline bool USB_Host_IsResumeFromWakeupRequestSent(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 268                         static inline bool USB_Host_IsResumeFromWakeupRequestSent(void)
 269                         {
 270                                 return ((UHCON & (1 << RESUME)) ? false : true);
 271                         }
 272
 273         /* Private Interface - For use in library only: */
 274         #if !defined(__DOXYGEN__)
 275                 /* Macros: */
 276                         static inline void USB_Host_HostMode_On(void) ATTR_ALWAYS_INLINE;
 277                         static inline void USB_Host_HostMode_On(void)
 278                         {
 279                                 USBCON |=  (1 << HOST);
 280                         }
 281
 282                         static inline void USB_Host_HostMode_Off(void) ATTR_ALWAYS_INLINE;
 283                         static inline void USB_Host_HostMode_Off(void)
 284                         {
 285                                 USBCON &= ~(1 << HOST);
 286                         }
 287
 288                         static inline void USB_Host_VBUS_Auto_Enable(void) ATTR_ALWAYS_INLINE;
 289                         static inline void USB_Host_VBUS_Auto_Enable(void)
 290                         {
 291                                 OTGCON &= ~(1 << VBUSHWC);
 292                                 UHWCON |=  (1 << UVCONE);
 293                         }
 294
 295                         static inline void USB_Host_VBUS_Manual_Enable(void) ATTR_ALWAYS_INLINE;
 296                         static inline void USB_Host_VBUS_Manual_Enable(void)
 297                         {
 298                                 OTGCON |=  (1 << VBUSHWC);
 299                                 UHWCON &= ~(1 << UVCONE);
 300
 301                                 DDRE   |=  (1 << 7);
 302                         }
 303
 304                         static inline void USB_Host_VBUS_Auto_On(void) ATTR_ALWAYS_INLINE;
 305                         static inline void USB_Host_VBUS_Auto_On(void)
 306                         {
 307                                 OTGCON |=  (1 << VBUSREQ);
 308                         }
 309
 310                         static inline void USB_Host_VBUS_Manual_On(void) ATTR_ALWAYS_INLINE;
 311                         static inline void USB_Host_VBUS_Manual_On(void)
 312                         {
 313                                 PORTE  |=  (1 << 7);
 314                         }
 315
 316                         static inline void USB_Host_VBUS_Auto_Off(void) ATTR_ALWAYS_INLINE;
 317                         static inline void USB_Host_VBUS_Auto_Off(void)
 318                         {
 319                                 OTGCON |=  (1 << VBUSRQC);
 320                         }
 321
 322                         static inline void USB_Host_VBUS_Manual_Off(void) ATTR_ALWAYS_INLINE;
 323                         static inline void USB_Host_VBUS_Manual_Off(void)
 324                         {
 325                                 PORTE  &= ~(1 << 7);
 326                         }
 327
 328                         static inline void USB_Host_SetDeviceAddress(const uint8_t Address) ATTR_ALWAYS_INLINE;
 329                         static inline void USB_Host_SetDeviceAddress(const uint8_t Address)
 330                         {
 331                                 UHADDR  =  (Address & 0x7F);
 332                         }
 333
 334                 /* Enums: */
 335                         enum USB_Host_WaitMSErrorCodes_t
 336                         {
 337                                 HOST_WAITERROR_Successful       = 0,
 338                                 HOST_WAITERROR_DeviceDisconnect = 1,
 339                                 HOST_WAITERROR_PipeError        = 2,
 340                                 HOST_WAITERROR_SetupStalled     = 3,
 341                         };
 342
 343                 /* Function Prototypes: */
 344                         void    USB_Host_ProcessNextHostState(void);
 345                         uint8_t USB_Host_WaitMS(uint8_t MS);
 346
 347                         #if defined(__INCLUDE_FROM_HOST_C)
 348                                 static void USB_Host_ResetDevice(void);
 349                         #endif
 350         #endif
 351
 352         /* Disable C linkage for C++ Compilers: */
 353                 #if defined(__cplusplus)
 354                         }
 355                 #endif
 356
 357 #endif
 358
 359 /** @} */
 360