LUFA/Drivers/USB/LowLevel/USBController.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  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                 UHWCON |= (1 << UIDE);
  67                 USB_INT_Enable(USB_INT_IDTI);
  68                 USB_CurrentMode = USB_GetUSBModeFromUID();
  69         }
  70         else
  71         {
  72                 USB_CurrentMode = Mode;
  73         }
  74         #endif
  75
  76         USB_IsInitialized = true;
  77
  78         USB_ResetInterface();
  79 }
  80
  81 void USB_ShutDown(void)
  82 {
  83         USB_INT_DisableAllInterrupts();
  84         USB_INT_ClearAllInterrupts();
  85
  86         USB_Detach();
  87         USB_Controller_Disable();
  88
  89         if (!(USB_Options & USB_OPT_MANUAL_PLL))
  90           USB_PLL_Off();
  91
  92         USB_REG_Off();
  93
  94         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  95         USB_OTGPAD_Off();
  96         #endif
  97
  98         #if defined(USB_CAN_BE_BOTH)
  99         USB_CurrentMode = USB_MODE_NONE;
 100         #endif
 101
 102         USB_IsInitialized = false;
 103 }
 104
 105 void USB_ResetInterface(void)
 106 {
 107         #if defined(USB_CAN_BE_BOTH)
 108         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 109         #endif
 110
 111         USB_INT_DisableAllInterrupts();
 112         USB_INT_ClearAllInterrupts();
 113
 114         USB_Controller_Reset();
 115
 116         if (!(USB_Options & USB_OPT_REG_DISABLED))
 117           USB_REG_On();
 118         else
 119           USB_REG_Off();
 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         USB_CLK_Unfreeze();
 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         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
 152         {
 153                 #if defined(USB_CAN_BE_HOST)
 154                 UHWCON &= ~(1 << UIMOD);
 155                 USB_Init_Host();
 156                 #endif
 157         }
 158
 159         #if (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 160         USB_OTGPAD_On();
 161         #endif
 162
 163         USB_Attach();
 164 }
 165
 166 #if defined(USB_CAN_BE_DEVICE)
 167 static void USB_Init_Device(void)
 168 {
 169         USB_DeviceState          = DEVICE_STATE_Unattached;
 170         USB_ConfigurationNumber  = 0;
 171
 172         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 173         USB_RemoteWakeupEnabled  = false;
 174         #endif
 175
 176         #if !defined(NO_DEVICE_SELF_POWER)
 177         USB_CurrentlySelfPowered = false;
 178         #endif
 179
 180         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 181         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 182
 183         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 184         {
 185                 #if defined(USE_RAM_DESCRIPTORS)
 186                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 187                 #elif defined(USE_EEPROM_DESCRIPTORS)
 188                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 189                 #else
 190                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 191                 #endif
 192         }
 193         #endif
 194
 195         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 196         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 197           USB_Device_SetLowSpeed();
 198         else
 199           USB_Device_SetFullSpeed();
 200
 201         USB_INT_Enable(USB_INT_VBUS);
 202         #endif
 203
 204         USB_INT_Clear(USB_INT_SUSPEND);
 205         USB_INT_Enable(USB_INT_SUSPEND);
 206         USB_INT_Clear(USB_INT_EORSTI);
 207         USB_INT_Enable(USB_INT_EORSTI);
 208 }
 209 #endif
 210
 211 #if defined(USB_CAN_BE_HOST)
 212 static void USB_Init_Host(void)
 213 {
 214         USB_HostState       = HOST_STATE_Unattached;
 215         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 216
 217         USB_Host_HostMode_On();
 218         USB_CLK_Unfreeze();
 219
 220         USB_Host_VBUS_Auto_Off();
 221         USB_Host_VBUS_Manual_Enable();
 222         USB_Host_VBUS_Manual_On();
 223
 224         USB_INT_Enable(USB_INT_SRPI);
 225         USB_INT_Enable(USB_INT_BCERRI);
 226 }
 227 #endif