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 #if defined(__AVR32__) && !defined(CONTROL_ONLY_DEVICE)
  43 uint8_t USB_SelectedEPNumber;
  44 #endif
  45
  46 void USB_Init(
  47                #if defined(USB_CAN_BE_BOTH)
  48                const uint8_t Mode
  49                #endif
  50
  51                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  52                ,
  53                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  54                void
  55                #endif
  56
  57                #if !defined(USE_STATIC_OPTIONS)
  58                const uint8_t Options
  59                #endif
  60                )
  61 {
  62         #if defined(__AVR32__)
  63         USB_SelectedEPNumber = 0;
  64         #endif
  65
  66         #if defined(USB_CAN_BE_BOTH)
  67         USB_CurrentMode = Mode;
  68         #endif
  69
  70         #if !defined(USE_STATIC_OPTIONS)
  71         USB_Options = Options;
  72         #endif
  73
  74         #if defined(USB_CAN_BE_HOST)
  75         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  76         #endif
  77
  78         #if defined(USB_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
  79         UHWCON |= (1 << UIMOD);
  80         #elif defined(USB_HOST_ONLY)
  81         UHWCON &= ~(1 << UIMOD);
  82         #elif defined(USB_CAN_BE_BOTH)
  83         if (Mode == USB_MODE_UID)
  84         {
  85                 UHWCON |=  (1 << UIDE);
  86
  87                 USB_INT_Clear(USB_INT_IDTI);
  88                 USB_INT_Enable(USB_INT_IDTI);
  89
  90                 USB_CurrentMode = USB_GetUSBModeFromUID();
  91         }
  92         else if (Mode == USB_MODE_DEVICE)
  93         {
  94                 UHWCON |=  (1 << UIMOD);
  95         }
  96         else if (Mode == USB_MODE_HOST)
  97         {
  98                 UHWCON &= ~(1 << UIMOD);
  99         }
 100         else
 101         {
 102                 EVENT_USB_InitFailure(USB_INITERROR_NoUSBModeSpecified);
 103                 return;
 104         }
 105         #endif
 106
 107         USB_ResetInterface();
 108
 109         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 110         USB_OTGPAD_On();
 111         #endif
 112
 113         USB_IsInitialized = true;
 114
 115         sei();
 116 }
 117
 118 void USB_ShutDown(void)
 119 {
 120         USB_ResetInterface();
 121         USB_Detach();
 122         USB_Controller_Disable();
 123
 124         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 125           USB_PLL_Off();
 126
 127         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 128         USB_OTGPAD_Off();
 129         #endif
 130
 131         #if defined(USB_CAN_BE_BOTH)
 132         UHWCON &= ~(1 << UIDE);
 133         #endif
 134
 135         USB_IsInitialized = false;
 136
 137         #if defined(USB_CAN_BE_BOTH)
 138         USB_CurrentMode = USB_MODE_NONE;
 139         #endif
 140 }
 141
 142 void USB_ResetInterface(void)
 143 {
 144         USB_INT_DisableAllInterrupts();
 145         USB_INT_ClearAllInterrupts();
 146
 147         #if defined(USB_CAN_BE_HOST)
 148         USB_HostState   = HOST_STATE_Unattached;
 149         #endif
 150
 151         #if defined(USB_CAN_BE_DEVICE)
 152         USB_DeviceState = DEVICE_STATE_Unattached;
 153         USB_ConfigurationNumber  = 0;
 154
 155         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 156                 USB_RemoteWakeupEnabled  = false;
 157         #endif
 158
 159         #if !defined(NO_DEVICE_SELF_POWER)
 160                 USB_CurrentlySelfPowered = false;
 161         #endif
 162         #endif
 163
 164         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 165         {
 166                 #if defined(USB_SERIES_4_AVR)
 167                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 168                 #endif
 169
 170                 USB_PLL_On();
 171                 while (!(USB_PLL_IsReady()));
 172         }
 173
 174         USB_Controller_Reset();
 175
 176         #if defined(USB_CAN_BE_BOTH)
 177         if (UHWCON & (1 << UIDE))
 178         {
 179                 USB_INT_Clear(USB_INT_IDTI);
 180                 USB_INT_Enable(USB_INT_IDTI);
 181                 USB_CurrentMode = USB_GetUSBModeFromUID();
 182         }
 183         #endif
 184
 185         if (!(USB_Options & USB_OPT_REG_DISABLED))
 186           USB_REG_On();
 187         else
 188           USB_REG_Off();
 189
 190         USB_CLK_Unfreeze();
 191
 192         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 193         if (USB_CurrentMode == USB_MODE_DEVICE)
 194         {
 195                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 196                   USB_Device_SetLowSpeed();
 197                 else
 198                   USB_Device_SetFullSpeed();
 199         }
 200         #endif
 201
 202         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 203         if (USB_CurrentMode == USB_MODE_DEVICE)
 204         {
 205                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 206
 207                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 208                 {
 209                         #if defined(USE_RAM_DESCRIPTORS)
 210                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 211                         #elif defined(USE_EEPROM_DESCRIPTORS)
 212                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 213                         #else
 214                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 215                         #endif
 216                 }
 217         }
 218         #endif
 219
 220         USB_Attach();
 221
 222         #if defined(USB_DEVICE_ONLY)
 223         USB_INT_Clear(USB_INT_SUSPEND);
 224         USB_INT_Enable(USB_INT_SUSPEND);
 225         USB_INT_Clear(USB_INT_EORSTI);
 226         USB_INT_Enable(USB_INT_EORSTI);
 227
 228                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 229                 USB_INT_Enable(USB_INT_VBUS);
 230                 #endif
 231         #elif defined(USB_HOST_ONLY)
 232         USB_Host_HostMode_On();
 233
 234         USB_Host_VBUS_Auto_Off();
 235         USB_OTGPAD_Off();
 236
 237         USB_Host_VBUS_Manual_Enable();
 238         USB_Host_VBUS_Manual_On();
 239
 240         USB_INT_Enable(USB_INT_SRPI);
 241         USB_INT_Enable(USB_INT_BCERRI);
 242         #else
 243         if (USB_CurrentMode == USB_MODE_DEVICE)
 244         {
 245                 USB_INT_Clear(USB_INT_SUSPEND);
 246                 USB_INT_Enable(USB_INT_SUSPEND);
 247                 USB_INT_Clear(USB_INT_EORSTI);
 248                 USB_INT_Enable(USB_INT_EORSTI);
 249
 250                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 251                 USB_INT_Enable(USB_INT_VBUS);
 252                 #endif
 253
 254                 #if defined(CONTROL_ONLY_DEVICE)
 255                 UENUM = ENDPOINT_CONTROLEP;
 256                 #endif
 257         }
 258         else if (USB_CurrentMode == USB_MODE_HOST)
 259         {
 260                 USB_Host_HostMode_On();
 261
 262                 USB_Host_VBUS_Auto_Off();
 263                 USB_OTGPAD_Off();
 264
 265                 USB_Host_VBUS_Manual_Enable();
 266                 USB_Host_VBUS_Manual_On();
 267
 268                 USB_INT_Enable(USB_INT_SRPI);
 269                 USB_INT_Enable(USB_INT_BCERRI);
 270         }
 271         #endif
 272 }