LUFA/Drivers/USB/LowLevel/LowLevel.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "LowLevel.h"
  33
  34 #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
  35 volatile uint8_t USB_CurrentMode = USB_MODE_NONE;
  36 #endif
  37
  38 #if !defined(USE_STATIC_OPTIONS)
  39 volatile uint8_t USB_Options;
  40 #endif
  41
  42 void USB_Init(
  43                #if defined(USB_CAN_BE_BOTH)
  44                const uint8_t Mode
  45                #endif
  46
  47                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  48                ,
  49                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  50                void
  51                #endif
  52
  53                #if !defined(USE_STATIC_OPTIONS)
  54                const uint8_t Options
  55                #endif
  56                )
  57 {
  58         #if defined(USB_CAN_BE_BOTH)
  59         USB_CurrentMode = Mode;
  60         #endif
  61
  62         #if !defined(USE_STATIC_OPTIONS)
  63         USB_Options = Options;
  64         #endif
  65
  66         #if defined(USB_CAN_BE_HOST)
  67         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  68         #endif
  69
  70         #if defined(USB_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
  71         UHWCON |= (1 << UIMOD);
  72         #elif defined(USB_HOST_ONLY)
  73         UHWCON &= ~(1 << UIMOD);
  74         #elif defined(USB_CAN_BE_BOTH)
  75         if (Mode == USB_MODE_UID)
  76         {
  77                 UHWCON |=  (1 << UIDE);
  78
  79                 USB_INT_Clear(USB_INT_IDTI);
  80                 USB_INT_Enable(USB_INT_IDTI);
  81
  82                 USB_CurrentMode = USB_GetUSBModeFromUID();
  83         }
  84         else if (Mode == USB_MODE_DEVICE)
  85         {
  86                 UHWCON |=  (1 << UIMOD);
  87         }
  88         else if (Mode == USB_MODE_HOST)
  89         {
  90                 UHWCON &= ~(1 << UIMOD);
  91         }
  92         else
  93         {
  94                 EVENT_USB_InitFailure(USB_INITERROR_NoUSBModeSpecified);
  95                 return;
  96         }
  97         #endif
  98
  99         USB_ResetInterface();
 100
 101         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 102         USB_OTGPAD_On();
 103         #endif
 104
 105         USB_IsInitialized = true;
 106
 107         sei();
 108 }
 109
 110 void USB_ShutDown(void)
 111 {
 112         USB_ResetInterface();
 113         USB_Detach();
 114         USB_Controller_Disable();
 115
 116         USB_INT_DisableAllInterrupts();
 117         USB_INT_ClearAllInterrupts();
 118
 119         #if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 120         UHWCON &= ~(1 << UIMOD);
 121         #endif
 122
 123         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 124           USB_PLL_Off();
 125
 126         USB_REG_Off();
 127
 128         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 129         USB_OTGPAD_Off();
 130         #endif
 131
 132         #if defined(USB_CAN_BE_BOTH)
 133         UHWCON &= ~(1 << UIDE);
 134         #endif
 135
 136         USB_IsInitialized = false;
 137
 138         #if defined(USB_CAN_BE_BOTH)
 139         USB_CurrentMode = USB_MODE_NONE;
 140         #endif
 141 }
 142
 143 void USB_ResetInterface(void)
 144 {
 145         USB_INT_DisableAllInterrupts();
 146         USB_INT_ClearAllInterrupts();
 147
 148         #if defined(USB_CAN_BE_HOST)
 149         USB_HostState   = HOST_STATE_Unattached;
 150         #endif
 151
 152         #if defined(USB_CAN_BE_DEVICE)
 153         USB_DeviceState = DEVICE_STATE_Unattached;
 154         USB_ConfigurationNumber  = 0;
 155
 156         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 157         USB_RemoteWakeupEnabled  = false;
 158         #endif
 159
 160         #if !defined(NO_DEVICE_SELF_POWER)
 161         USB_CurrentlySelfPowered = false;
 162         #endif
 163         #endif
 164
 165         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 166         {
 167                 #if defined(USB_SERIES_4_AVR)
 168                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 169                 #endif
 170
 171                 USB_PLL_On();
 172                 while (!(USB_PLL_IsReady()));
 173         }
 174
 175         USB_Controller_Reset();
 176
 177         #if defined(USB_CAN_BE_BOTH)
 178         if (UHWCON & (1 << UIDE))
 179         {
 180                 USB_INT_Clear(USB_INT_IDTI);
 181                 USB_INT_Enable(USB_INT_IDTI);
 182                 USB_CurrentMode = USB_GetUSBModeFromUID();
 183         }
 184         #endif
 185
 186         if (!(USB_Options & USB_OPT_REG_DISABLED))
 187           USB_REG_On();
 188         else
 189           USB_REG_Off();
 190
 191         USB_CLK_Unfreeze();
 192
 193         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 194         if (USB_CurrentMode == USB_MODE_DEVICE)
 195         {
 196                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 197                   USB_Device_SetLowSpeed();
 198                 else
 199                   USB_Device_SetFullSpeed();
 200         }
 201         #endif
 202
 203         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 204         if (USB_CurrentMode == USB_MODE_DEVICE)
 205         {
 206                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 207
 208                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 209                 {
 210                         #if defined(USE_RAM_DESCRIPTORS)
 211                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 212                         #elif defined(USE_EEPROM_DESCRIPTORS)
 213                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 214                         #else
 215                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 216                         #endif
 217                 }
 218         }
 219         #endif
 220
 221         USB_Attach();
 222
 223         #if defined(USB_DEVICE_ONLY)
 224         USB_INT_Clear(USB_INT_SUSPEND);
 225         USB_INT_Enable(USB_INT_SUSPEND);
 226         USB_INT_Clear(USB_INT_EORSTI);
 227         USB_INT_Enable(USB_INT_EORSTI);
 228
 229         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 230         USB_INT_Enable(USB_INT_VBUS);
 231         #endif
 232         #elif defined(USB_HOST_ONLY)
 233         USB_Host_HostMode_On();
 234
 235         USB_Host_VBUS_Auto_Off();
 236         USB_OTGPAD_Off();
 237
 238         USB_Host_VBUS_Manual_Enable();
 239         USB_Host_VBUS_Manual_On();
 240
 241         USB_INT_Enable(USB_INT_SRPI);
 242         USB_INT_Enable(USB_INT_BCERRI);
 243         #else
 244         if (USB_CurrentMode == USB_MODE_DEVICE)
 245         {
 246                 USB_INT_Clear(USB_INT_SUSPEND);
 247                 USB_INT_Enable(USB_INT_SUSPEND);
 248                 USB_INT_Clear(USB_INT_EORSTI);
 249                 USB_INT_Enable(USB_INT_EORSTI);
 250
 251                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 252                 USB_INT_Enable(USB_INT_VBUS);
 253                 #endif
 254
 255                 #if defined(CONTROL_ONLY_DEVICE)
 256                 UENUM = ENDPOINT_CONTROLEP;
 257                 #endif
 258         }
 259         else if (USB_CurrentMode == USB_MODE_HOST)
 260         {
 261                 USB_Host_HostMode_On();
 262
 263                 USB_Host_VBUS_Auto_Off();
 264                 USB_OTGPAD_Off();
 265
 266                 USB_Host_VBUS_Manual_Enable();
 267                 USB_Host_VBUS_Manual_On();
 268
 269                 USB_INT_Enable(USB_INT_SRPI);
 270                 USB_INT_Enable(USB_INT_BCERRI);
 271         }
 272         #endif
 273 }