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_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 134         UHWCON |=  (1 << UIMOD);
 135         USB_Init_Device();
 136         #elif defined(USB_HOST_ONLY)
 137         UHWCON &= ~(1 << UIMOD);
 138         USB_Init_Host();
 139         #elif defined(USB_CAN_BE_BOTH)
 140         if (UIDModeSelectEnabled)
 141         {
 142                 UHWCON |= (1 << UIDE);
 143                 USB_INT_Enable(USB_INT_IDTI);
 144         }
 145
 146         if (USB_CurrentMode == USB_MODE_DEVICE)
 147         {
 148                 UHWCON |=  (1 << UIMOD);
 149                 USB_Init_Device();
 150         }
 151         else
 152         {
 153                 UHWCON &= ~(1 << UIMOD);
 154                 USB_Init_Host();
 155         }
 156         #endif
 157
 158         USB_OTGPAD_On();
 159         USB_Attach();
 160 }
 161
 162 #if defined(USB_CAN_BE_DEVICE)
 163 static void USB_Init_Device(void)
 164 {
 165         USB_DeviceState          = DEVICE_STATE_Unattached;
 166         USB_ConfigurationNumber  = 0;
 167
 168         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 169         USB_RemoteWakeupEnabled  = false;
 170         #endif
 171
 172         #if !defined(NO_DEVICE_SELF_POWER)
 173         USB_CurrentlySelfPowered = false;
 174         #endif
 175
 176         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 177         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 178
 179         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 180         {
 181                 #if defined(USE_RAM_DESCRIPTORS)
 182                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 183                 #elif defined(USE_EEPROM_DESCRIPTORS)
 184                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 185                 #else
 186                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 187                 #endif
 188         }
 189         #endif
 190
 191         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 192         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 193           USB_Device_SetLowSpeed();
 194         else
 195           USB_Device_SetFullSpeed();
 196
 197         USB_INT_Enable(USB_INT_VBUS);
 198         #endif
 199
 200         USB_INT_Clear(USB_INT_SUSPEND);
 201         USB_INT_Enable(USB_INT_SUSPEND);
 202         USB_INT_Clear(USB_INT_EORSTI);
 203         USB_INT_Enable(USB_INT_EORSTI);
 204 }
 205 #endif
 206
 207 #if defined(USB_CAN_BE_HOST)
 208 static void USB_Init_Host(void)
 209 {
 210         USB_HostState       = HOST_STATE_Unattached;
 211         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 212
 213         USB_Host_HostMode_On();
 214         USB_CLK_Unfreeze();
 215
 216         USB_Host_VBUS_Auto_Off();
 217         USB_Host_VBUS_Manual_Enable();
 218         USB_Host_VBUS_Manual_On();
 219
 220         USB_INT_Enable(USB_INT_SRPI);
 221         USB_INT_Enable(USB_INT_BCERRI);
 222 }
 223 #endif