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                 UHWCON &= ~(1 << UIDE);
  85                 USB_CurrentMode = Mode;
  86         }
  87         #endif
  88
  89         USB_IsInitialized = true;
  90
  91         USB_ResetInterface();
  92 }
  93
  94 void USB_Disable(void)
  95 {
  96         USB_INT_DisableAllInterrupts();
  97         USB_INT_ClearAllInterrupts();
  98
  99         USB_Detach();
 100         USB_Controller_Disable();
 101
 102         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 103           USB_PLL_Off();
 104
 105         USB_REG_Off();
 106
 107         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 108         USB_OTGPAD_Off();
 109         #endif
 110
 111         #if defined(USB_CAN_BE_BOTH)
 112         USB_CurrentMode = USB_MODE_None;
 113         #endif
 114
 115         USB_IsInitialized = false;
 116 }
 117
 118 void USB_ResetInterface(void)
 119 {
 120         #if defined(USB_CAN_BE_BOTH)
 121         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 122         #endif
 123
 124         USB_INT_DisableAllInterrupts();
 125         USB_INT_ClearAllInterrupts();
 126
 127         USB_Controller_Reset();
 128
 129         #if defined(USB_CAN_BE_BOTH)
 130         if (UIDModeSelectEnabled)
 131           USB_INT_Enable(USB_INT_IDTI);
 132         #endif
 133
 134         USB_CLK_Unfreeze();
 135
 136         if (USB_CurrentMode == USB_MODE_Device)
 137         {
 138                 #if defined(USB_CAN_BE_DEVICE)
 139                 #if (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 140                 UHWCON |=  (1 << UIMOD);
 141                 #endif
 142
 143                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 144                 {
 145                         #if defined(USB_SERIES_2_AVR)
 146                         USB_PLL_On();
 147                         while (!(USB_PLL_IsReady()));
 148                         #else
 149                         USB_PLL_Off();
 150                         #endif
 151                 }
 152
 153                 USB_Init_Device();
 154                 #endif
 155         }
 156         else if (USB_CurrentMode == USB_MODE_Host)
 157         {
 158                 #if defined(USB_CAN_BE_HOST)
 159                 UHWCON &= ~(1 << UIMOD);
 160
 161                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 162                 {
 163                         #if defined(USB_CAN_BE_HOST)
 164                         USB_PLL_On();
 165                         while (!(USB_PLL_IsReady()));
 166                         #endif
 167                 }
 168
 169                 USB_Init_Host();
 170                 #endif
 171         }
 172
 173         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 174         USB_OTGPAD_On();
 175         #endif
 176 }
 177
 178 #if defined(USB_CAN_BE_DEVICE)
 179 static void USB_Init_Device(void)
 180 {
 181         USB_DeviceState          = DEVICE_STATE_Unattached;
 182         USB_ConfigurationNumber  = 0;
 183
 184         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 185         USB_RemoteWakeupEnabled  = false;
 186         #endif
 187
 188         #if !defined(NO_DEVICE_SELF_POWER)
 189         USB_CurrentlySelfPowered = false;
 190         #endif
 191
 192         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 193         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 194
 195         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 196         {
 197                 #if defined(USE_RAM_DESCRIPTORS)
 198                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 199                 #elif defined(USE_EEPROM_DESCRIPTORS)
 200                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 201                 #else
 202                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 203                 #endif
 204         }
 205         #endif
 206
 207         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 208         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 209           USB_Device_SetLowSpeed();
 210         else
 211           USB_Device_SetFullSpeed();
 212
 213         USB_INT_Enable(USB_INT_VBUSTI);
 214         #endif
 215
 216         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 217                                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 218                                                            ENDPOINT_BANK_SINGLE);
 219
 220         USB_INT_Clear(USB_INT_SUSPI);
 221         USB_INT_Enable(USB_INT_SUSPI);
 222         USB_INT_Enable(USB_INT_EORSTI);
 223
 224         USB_Attach();
 225 }
 226 #endif
 227
 228 #if defined(USB_CAN_BE_HOST)
 229 static void USB_Init_Host(void)
 230 {
 231         USB_HostState       = HOST_STATE_Unattached;
 232         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 233
 234         USB_Host_HostMode_On();
 235
 236         USB_Host_VBUS_Auto_Off();
 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
 243         USB_Attach();
 244 }
 245 #endif
 246