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