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         if (!(USB_Options & USB_OPT_REG_DISABLED))
  64           USB_REG_On();
  65         else
  66           USB_REG_Off();
  67
  68         if (!(USB_Options & USB_OPT_MANUAL_PLL))
  69         {
  70                 #if defined(USB_SERIES_4_AVR)
  71                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
  72                 #endif
  73         }
  74
  75         #if defined(USB_CAN_BE_BOTH)
  76         if (Mode == USB_MODE_UID)
  77         {
  78                 UHWCON |= (1 << UIDE);
  79                 USB_INT_Enable(USB_INT_IDTI);
  80                 USB_CurrentMode = USB_GetUSBModeFromUID();
  81         }
  82         else
  83         {
  84                 USB_CurrentMode = Mode;
  85         }
  86         #endif
  87
  88         USB_IsInitialized = true;
  89
  90         USB_ResetInterface();
  91 }
  92
  93 void USB_Disable(void)
  94 {
  95         USB_INT_DisableAllInterrupts();
  96         USB_INT_ClearAllInterrupts();
  97
  98         USB_Detach();
  99         USB_Controller_Disable();
 100
 101         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 102           USB_PLL_Off();
 103
 104         USB_REG_Off();
 105
 106         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 107         USB_OTGPAD_Off();
 108         #endif
 109
 110         #if defined(USB_CAN_BE_BOTH)
 111         USB_CurrentMode = USB_MODE_None;
 112         #endif
 113
 114         USB_IsInitialized = false;
 115 }
 116
 117 void USB_ResetInterface(void)
 118 {
 119         #if defined(USB_CAN_BE_BOTH)
 120         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 121         #endif
 122
 123         USB_INT_DisableAllInterrupts();
 124         USB_INT_ClearAllInterrupts();
 125
 126         USB_Controller_Reset();
 127
 128         #if defined(USB_CAN_BE_BOTH)
 129         if (UIDModeSelectEnabled)
 130           USB_INT_Enable(USB_INT_IDTI);
 131         #endif
 132
 133         USB_CLK_Unfreeze();
 134
 135         if (USB_CurrentMode == USB_MODE_Device)
 136         {
 137                 #if defined(USB_CAN_BE_DEVICE)
 138                 #if (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 139                 UHWCON |=  (1 << UIMOD);
 140                 #endif
 141
 142                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 143                 {
 144                         #if defined(USB_SERIES_2_AVR)
 145                         USB_PLL_On();
 146                         while (!(USB_PLL_IsReady()));
 147                         #else
 148                         USB_PLL_Off();
 149                         #endif
 150                 }
 151
 152                 USB_Init_Device();
 153                 #endif
 154         }
 155         else if (USB_CurrentMode == USB_MODE_Host)
 156         {
 157                 #if defined(USB_CAN_BE_HOST)
 158                 UHWCON &= ~(1 << UIMOD);
 159
 160                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 161                 {
 162                         #if defined(USB_CAN_BE_HOST)
 163                         USB_PLL_On();
 164                         while (!(USB_PLL_IsReady()));
 165                         #endif
 166                 }
 167
 168                 USB_Init_Host();
 169                 #endif
 170         }
 171
 172         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 173         USB_OTGPAD_On();
 174         #endif
 175 }
 176
 177 #if defined(USB_CAN_BE_DEVICE)
 178 static void USB_Init_Device(void)
 179 {
 180         USB_DeviceState          = DEVICE_STATE_Unattached;
 181         USB_ConfigurationNumber  = 0;
 182
 183         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 184         USB_RemoteWakeupEnabled  = false;
 185         #endif
 186
 187         #if !defined(NO_DEVICE_SELF_POWER)
 188         USB_CurrentlySelfPowered = false;
 189         #endif
 190
 191         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 192         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 193
 194         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 195         {
 196                 #if defined(USE_RAM_DESCRIPTORS)
 197                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 198                 #elif defined(USE_EEPROM_DESCRIPTORS)
 199                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 200                 #else
 201                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 202                 #endif
 203         }
 204         #endif
 205
 206         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 207         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 208           USB_Device_SetLowSpeed();
 209         else
 210           USB_Device_SetFullSpeed();
 211
 212         USB_INT_Enable(USB_INT_VBUSTI);
 213         #endif
 214
 215         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 216                                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 217                                                            ENDPOINT_BANK_SINGLE);
 218
 219         USB_INT_Clear(USB_INT_SUSPI);
 220         USB_INT_Enable(USB_INT_SUSPI);
 221         USB_INT_Enable(USB_INT_EORSTI);
 222
 223         USB_Attach();
 224 }
 225 #endif
 226
 227 #if defined(USB_CAN_BE_HOST)
 228 static void USB_Init_Host(void)
 229 {
 230         USB_HostState       = HOST_STATE_Unattached;
 231         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 232
 233         USB_Host_HostMode_On();
 234
 235         USB_Host_VBUS_Auto_Off();
 236         USB_Host_VBUS_Manual_Enable();
 237         USB_Host_VBUS_Manual_On();
 238
 239         USB_INT_Enable(USB_INT_SRPI);
 240         USB_INT_Enable(USB_INT_BCERRI);
 241
 242         USB_Attach();
 243 }
 244 #endif
 245