LUFA/Drivers/USB/Core/UC3/USBController_UC3.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         #if defined(USB_CAN_BE_BOTH)
  64         if (Mode == USB_MODE_UID)
  65         {
  66                 AVR32_USBB.USBCON.uide = true;
  67                 USB_INT_Enable(USB_INT_IDTI);
  68                 USB_CurrentMode = USB_GetUSBModeFromUID();
  69         }
  70         else
  71         {
  72                 AVR32_USBB.USBCON.uide = false;
  73                 USB_CurrentMode = Mode;
  74         }
  75         #endif
  76
  77         USB_IsInitialized = true;
  78
  79         USB_ResetInterface();
  80 }
  81
  82 void USB_Disable(void)
  83 {
  84         USB_INT_DisableAllInterrupts();
  85         USB_INT_ClearAllInterrupts();
  86
  87         USB_Detach();
  88         USB_Controller_Disable();
  89
  90         USB_OTGPAD_Off();
  91
  92         #if defined(USB_CAN_BE_BOTH)
  93         USB_CurrentMode = USB_MODE_None;
  94         #endif
  95
  96         AVR32_PM.GCCTRL[3].cen = false;
  97
  98         USB_IsInitialized = false;
  99 }
 100
 101 void USB_ResetInterface(void)
 102 {
 103         #if defined(USB_CAN_BE_BOTH)
 104         bool UIDModeSelectEnabled = AVR32_USBB.USBCON.uide;
 105         #endif
 106
 107         AVR32_PM.GCCTRL[AVR32_PM_GCLK_USBB].pllsel = !(USB_Options & USB_OPT_GCLK_SRC_OSC);
 108         AVR32_PM.GCCTRL[AVR32_PM_GCLK_USBB].oscsel = !(USB_Options & USB_OPT_GCLK_CHANNEL_0);
 109         AVR32_PM.GCCTRL[AVR32_PM_GCLK_USBB].diven  = (F_USB != USB_CLOCK_REQUIRED_FREQ);
 110         AVR32_PM.GCCTRL[AVR32_PM_GCLK_USBB].div    = (F_USB == USB_CLOCK_REQUIRED_FREQ) ? 0 : (uint32_t)(((F_USB / USB_CLOCK_REQUIRED_FREQ) - 1) / 2);
 111         AVR32_PM.GCCTRL[AVR32_PM_GCLK_USBB].cen    = true;
 112
 113         USB_INT_DisableAllInterrupts();
 114         USB_INT_ClearAllInterrupts();
 115
 116         USB_Controller_Reset();
 117
 118         #if defined(USB_CAN_BE_BOTH)
 119         if (UIDModeSelectEnabled)
 120           USB_INT_Enable(USB_INT_IDTI);
 121         #endif
 122
 123         USB_CLK_Unfreeze();
 124
 125         if (USB_CurrentMode == USB_MODE_Device)
 126         {
 127                 #if defined(USB_CAN_BE_DEVICE)
 128                 AVR32_USBB.USBCON.uimod = true;
 129
 130                 USB_Init_Device();
 131                 #endif
 132         }
 133         else if (USB_CurrentMode == USB_MODE_Host)
 134         {
 135                 #if defined(USB_CAN_BE_HOST)
 136                 AVR32_USBB.USBCON.uimod = false;
 137
 138                 USB_Init_Host();
 139                 #endif
 140         }
 141
 142         USB_OTGPAD_On();
 143 }
 144
 145 #if defined(USB_CAN_BE_DEVICE)
 146 static void USB_Init_Device(void)
 147 {
 148         USB_DeviceState          = DEVICE_STATE_Unattached;
 149         USB_ConfigurationNumber  = 0;
 150
 151         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 152         USB_RemoteWakeupEnabled  = false;
 153         #endif
 154
 155         #if !defined(NO_DEVICE_SELF_POWER)
 156         USB_CurrentlySelfPowered = false;
 157         #endif
 158
 159         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 160         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 161
 162         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 163           USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 164         #endif
 165
 166         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 167           USB_Device_SetLowSpeed();
 168         else
 169           USB_Device_SetFullSpeed();
 170
 171         USB_INT_Enable(USB_INT_VBUSTI);
 172
 173         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 174                                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 175                                                            ENDPOINT_BANK_SINGLE);
 176
 177         USB_INT_Clear(USB_INT_SUSPI);
 178         USB_INT_Enable(USB_INT_SUSPI);
 179         USB_INT_Enable(USB_INT_EORSTI);
 180
 181         USB_Attach();
 182 }
 183 #endif
 184
 185 #if defined(USB_CAN_BE_HOST)
 186 static void USB_Init_Host(void)
 187 {
 188         USB_HostState       = HOST_STATE_Unattached;
 189         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 190
 191         USB_Host_HostMode_On();
 192
 193         USB_Host_VBUS_Auto_On();
 194
 195         USB_INT_Enable(USB_INT_DCONNI);
 196         USB_INT_Enable(USB_INT_BCERRI);
 197
 198         USB_Attach();
 199 }
 200 #endif
 201