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         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 108
 109         USB_INT_DisableAllInterrupts();
 110         USB_INT_ClearAllInterrupts();
 111
 112         USB_Controller_Reset();
 113
 114         if (!(USB_Options & USB_OPT_REG_DISABLED))
 115           USB_REG_On();
 116         else
 117           USB_REG_Off();
 118
 119         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 120         {
 121                 #if defined(USB_SERIES_4_AVR)
 122                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 123                 #endif
 124
 125                 USB_PLL_On();
 126                 while (!(USB_PLL_IsReady()));
 127         }
 128
 129         USB_CLK_Unfreeze();
 130
 131         #if defined(USB_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 132         UHWCON |=  (1 << UIMOD);
 133         USB_Init_Device();
 134         #elif defined(USB_HOST_ONLY)
 135         UHWCON &= ~(1 << UIMOD);
 136         USB_Init_Host();
 137         #elif defined(USB_CAN_BE_BOTH)
 138         if (UIDModeSelectEnabled)
 139         {
 140                 UHWCON |= (1 << UIDE);
 141                 USB_INT_Enable(USB_INT_IDTI);
 142         }
 143
 144         if (USB_CurrentMode == USB_MODE_DEVICE)
 145         {
 146                 UHWCON |=  (1 << UIMOD);
 147                 USB_Init_Device();
 148         }
 149         else
 150         {
 151                 UHWCON &= ~(1 << UIMOD);
 152                 USB_Init_Host();
 153         }
 154         #endif
 155
 156         USB_OTGPAD_On();
 157         USB_Attach();
 158 }
 159
 160 #if defined(USB_CAN_BE_DEVICE)
 161 static void USB_Init_Device(void)
 162 {
 163         USB_DeviceState          = DEVICE_STATE_Unattached;
 164         USB_ConfigurationNumber  = 0;
 165
 166         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 167         USB_RemoteWakeupEnabled  = false;
 168         #endif
 169
 170         #if !defined(NO_DEVICE_SELF_POWER)
 171         USB_CurrentlySelfPowered = false;
 172         #endif
 173
 174         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 175         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 176
 177         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 178         {
 179                 #if defined(USE_RAM_DESCRIPTORS)
 180                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 181                 #elif defined(USE_EEPROM_DESCRIPTORS)
 182                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 183                 #else
 184                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 185                 #endif
 186         }
 187         #endif
 188
 189         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 190         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 191           USB_Device_SetLowSpeed();
 192         else
 193           USB_Device_SetFullSpeed();
 194
 195         USB_INT_Enable(USB_INT_VBUS);
 196         #endif
 197
 198         USB_INT_Clear(USB_INT_SUSPEND);
 199         USB_INT_Enable(USB_INT_SUSPEND);
 200         USB_INT_Clear(USB_INT_EORSTI);
 201         USB_INT_Enable(USB_INT_EORSTI);
 202 }
 203 #endif
 204
 205 #if defined(USB_CAN_BE_HOST)
 206 static void USB_Init_Host(void)
 207 {
 208         USB_HostState       = HOST_STATE_Unattached;
 209         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 210
 211         USB_Host_HostMode_On();
 212         USB_CLK_Unfreeze();
 213
 214         USB_Host_VBUS_Auto_Off();
 215         USB_Host_VBUS_Manual_Enable();
 216         USB_Host_VBUS_Manual_On();
 217
 218         USB_INT_Enable(USB_INT_SRPI);
 219         USB_INT_Enable(USB_INT_BCERRI);
 220 }
 221 #endif