LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.c

   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 #define  __INCLUDE_FROM_USB_DRIVER
  32 #define  __INCLUDE_FROM_USB_CONTROLLER_C
  33 #include "../USBController.h"
  34
  35 #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
  36 volatile uint8_t USB_CurrentMode = USB_MODE_None;
  37 #endif
  38
  39 #if !defined(USE_STATIC_OPTIONS)
  40 volatile uint8_t USB_Options;
  41 #endif
  42
  43 void USB_Init(
  44                #if defined(USB_CAN_BE_BOTH)
  45                const uint8_t Mode
  46                #endif
  47
  48                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  49                ,
  50                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  51                void
  52                #endif
  53
  54                #if !defined(USE_STATIC_OPTIONS)
  55                const uint8_t Options
  56                #endif
  57                )
  58 {
  59         #if !defined(USE_STATIC_OPTIONS)
  60         USB_Options = Options;
  61         #endif
  62
  63         USB_INT_RegisterHandlers();
  64
  65         if (!(USB_Options & USB_OPT_REG_DISABLED))
  66           USB_REG_On();
  67         else
  68           USB_REG_Off();
  69
  70         #if defined(USB_CAN_BE_BOTH)
  71         if (Mode == USB_MODE_UID)
  72         {
  73                 UHWCON |= (1 << UIDE);
  74                 USB_INT_Enable(USB_INT_IDTI);
  75                 USB_CurrentMode = USB_GetUSBModeFromUID();
  76         }
  77         else
  78         {
  79                 USB_CurrentMode = Mode;
  80         }
  81         #endif
  82
  83         USB_IsInitialized = true;
  84
  85         USB_ResetInterface();
  86 }
  87
  88 void USB_Disable(void)
  89 {
  90         USB_INT_DisableAllInterrupts();
  91         USB_INT_ClearAllInterrupts();
  92
  93         USB_Detach();
  94         USB_Controller_Disable();
  95
  96         if (!(USB_Options & USB_OPT_MANUAL_PLL))
  97           USB_PLL_Off();
  98
  99         USB_REG_Off();
 100
 101         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 102         USB_OTGPAD_Off();
 103         #endif
 104
 105         #if defined(USB_CAN_BE_BOTH)
 106         USB_CurrentMode = USB_MODE_None;
 107         #endif
 108
 109         USB_IsInitialized = false;
 110 }
 111
 112 void USB_ResetInterface(void)
 113 {
 114         #if defined(USB_CAN_BE_BOTH)
 115         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 116         #endif
 117
 118         USB_INT_DisableAllInterrupts();
 119         USB_INT_ClearAllInterrupts();
 120
 121         USB_Controller_Reset();
 122
 123         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 124         {
 125                 #if defined(USB_SERIES_4_AVR)
 126                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 127                 #endif
 128
 129                 USB_PLL_On();
 130                 while (!(USB_PLL_IsReady()));
 131         }
 132
 133         #if defined(USB_CAN_BE_BOTH)
 134         if (UIDModeSelectEnabled)
 135         {
 136                 UHWCON |= (1 << UIDE);
 137                 USB_INT_Enable(USB_INT_IDTI);
 138         }
 139         #endif
 140
 141         USB_CLK_Unfreeze();
 142
 143         if (USB_CurrentMode == USB_MODE_Device)
 144         {
 145                 #if defined(USB_CAN_BE_DEVICE)
 146                 #if (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 147                 UHWCON |=  (1 << UIMOD);
 148                 #endif
 149
 150                 USB_Init_Device();
 151                 #endif
 152         }
 153         else if (USB_CurrentMode == USB_MODE_Host)
 154         {
 155                 #if defined(USB_CAN_BE_HOST)
 156                 UHWCON &= ~(1 << UIMOD);
 157
 158                 USB_Init_Host();
 159                 #endif
 160         }
 161
 162         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 163         USB_OTGPAD_On();
 164         #endif
 165 }
 166
 167 #if defined(USB_CAN_BE_DEVICE)
 168 static void USB_Init_Device(void)
 169 {
 170         USB_DeviceState          = DEVICE_STATE_Unattached;
 171         USB_ConfigurationNumber  = 0;
 172
 173         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 174         USB_RemoteWakeupEnabled  = false;
 175         #endif
 176
 177         #if !defined(NO_DEVICE_SELF_POWER)
 178         USB_CurrentlySelfPowered = false;
 179         #endif
 180
 181         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 182         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 183
 184         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 185         {
 186                 #if defined(USE_RAM_DESCRIPTORS)
 187                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 188                 #elif defined(USE_EEPROM_DESCRIPTORS)
 189                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 190                 #else
 191                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 192                 #endif
 193         }
 194         #endif
 195
 196         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 197         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 198           USB_Device_SetLowSpeed();
 199         else
 200           USB_Device_SetFullSpeed();
 201
 202         USB_INT_Enable(USB_INT_VBUSTI);
 203         #endif
 204
 205         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 206                                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 207                                                            ENDPOINT_BANK_SINGLE);
 208
 209         USB_INT_Clear(USB_INT_SUSPI);
 210         USB_INT_Enable(USB_INT_SUSPI);
 211         USB_INT_Enable(USB_INT_EORSTI);
 212
 213         USB_Attach();
 214 }
 215 #endif
 216
 217 #if defined(USB_CAN_BE_HOST)
 218 static void USB_Init_Host(void)
 219 {
 220         USB_HostState       = HOST_STATE_Unattached;
 221         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 222
 223         USB_Host_HostMode_On();
 224
 225         USB_Host_VBUS_Auto_Off();
 226         USB_Host_VBUS_Manual_Enable();
 227         USB_Host_VBUS_Manual_On();
 228
 229         USB_INT_Enable(USB_INT_SRPI);
 230         USB_INT_Enable(USB_INT_BCERRI);
 231
 232         USB_Attach();
 233 }
 234 #endif
 235