LUFA/Drivers/USB/LowLevel/LowLevel.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 #include "LowLevel.h"
  32
  33 #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
  34 volatile uint8_t USB_CurrentMode = USB_MODE_NONE;
  35 #endif
  36
  37 #if !defined(USE_STATIC_OPTIONS)
  38 volatile uint8_t USB_Options;
  39 #endif
  40
  41 void USB_Init(
  42                #if defined(USB_CAN_BE_BOTH)
  43                const uint8_t Mode
  44                #endif
  45
  46                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  47                ,
  48                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  49                void
  50                #endif
  51
  52                #if !defined(USE_STATIC_OPTIONS)
  53                const uint8_t Options
  54                #endif
  55                )
  56 {
  57         #if defined(USB_CAN_BE_BOTH)
  58         USB_CurrentMode = Mode;
  59         #endif
  60
  61         #if !defined(USE_STATIC_OPTIONS)
  62         USB_Options = Options;
  63         #endif
  64
  65         #if defined(USB_CAN_BE_HOST)
  66         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  67         #endif
  68
  69         #if defined(USB_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
  70         UHWCON |= (1 << UIMOD);
  71         #elif defined(USB_HOST_ONLY)
  72         UHWCON &= ~(1 << UIMOD);
  73         #elif defined(USB_CAN_BE_BOTH)
  74         if (Mode == USB_MODE_UID)
  75         {
  76                 UHWCON |=  (1 << UIDE);
  77
  78                 USB_INT_Clear(USB_INT_IDTI);
  79                 USB_INT_Enable(USB_INT_IDTI);
  80
  81                 USB_CurrentMode = USB_GetUSBModeFromUID();
  82         }
  83         else if (Mode == USB_MODE_DEVICE)
  84         {
  85                 UHWCON |=  (1 << UIMOD);
  86         }
  87         else if (Mode == USB_MODE_HOST)
  88         {
  89                 UHWCON &= ~(1 << UIMOD);
  90         }
  91         else
  92         {
  93                 EVENT_USB_InitFailure(USB_INITERROR_NoUSBModeSpecified);
  94                 return;
  95         }
  96         #endif
  97
  98         USB_ResetInterface();
  99
 100         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 101         USB_OTGPAD_On();
 102         #endif
 103
 104         USB_IsInitialized = true;
 105
 106         sei();
 107 }
 108
 109 void USB_ShutDown(void)
 110 {
 111         #if defined(USB_CAN_BE_DEVICE)
 112         if (USB_DeviceState != DEVICE_STATE_Unattached)
 113           EVENT_USB_Disconnect();
 114         #endif
 115
 116         #if defined(USB_CAN_BE_HOST)
 117         if (USB_HostState != HOST_STATE_Unattached)
 118           EVENT_USB_Disconnect();
 119         #endif
 120
 121         USB_ResetInterface();
 122         USB_Detach();
 123         USB_Controller_Disable();
 124         USB_PLL_Off();
 125
 126         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 127         USB_OTGPAD_Off();
 128         #endif
 129
 130         #if defined(USB_CAN_BE_BOTH)
 131         UHWCON &= ~(1 << UIDE);
 132         #endif
 133
 134         USB_IsInitialized = false;
 135
 136         #if defined(CAN_BE_BOTH)
 137         USB_CurrentMode = USB_MODE_NONE;
 138         #endif
 139 }
 140
 141 void USB_ResetInterface(void)
 142 {
 143         USB_INT_DisableAllInterrupts();
 144         USB_INT_ClearAllInterrupts();
 145
 146         #if defined(USB_CAN_BE_HOST)
 147         USB_HostState   = HOST_STATE_Unattached;
 148         #endif
 149
 150         #if defined(USB_CAN_BE_DEVICE)
 151         USB_DeviceState = DEVICE_STATE_Unattached;
 152         USB_ConfigurationNumber  = 0;
 153         USB_RemoteWakeupEnabled  = false;
 154         USB_CurrentlySelfPowered = false;
 155         #endif
 156
 157         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 158         {
 159                 #if defined(USB_SERIES_4_AVR)
 160                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 161                 #endif
 162
 163                 USB_PLL_On();
 164                 while (!(USB_PLL_IsReady()));
 165         }
 166
 167         USB_Controller_Reset();
 168
 169         #if defined(USB_CAN_BE_BOTH)
 170         if (UHWCON & (1 << UIDE))
 171         {
 172                 USB_INT_Clear(USB_INT_IDTI);
 173                 USB_INT_Enable(USB_INT_IDTI);
 174                 USB_CurrentMode = USB_GetUSBModeFromUID();
 175         }
 176         #endif
 177
 178         if (!(USB_Options & USB_OPT_REG_DISABLED))
 179           USB_REG_On();
 180         else
 181           USB_REG_Off();
 182
 183         USB_CLK_Unfreeze();
 184
 185         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 186         if (USB_CurrentMode == USB_MODE_DEVICE)
 187         {
 188                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 189                   USB_Device_SetLowSpeed();
 190                 else
 191                   USB_Device_SetHighSpeed();
 192
 193                 USB_INT_Enable(USB_INT_VBUS);
 194         }
 195         #endif
 196
 197         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 198         if (USB_CurrentMode == USB_MODE_DEVICE)
 199         {
 200                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 201
 202                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 203                 {
 204                         #if defined(USE_RAM_DESCRIPTORS)
 205                                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 206                         #elif defined(USE_EEPROM_DESCRIPTORS)
 207                                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 208                         #else
 209                                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 210                         #endif
 211                 }
 212         }
 213         #endif
 214
 215         USB_Attach();
 216
 217         #if defined(USB_DEVICE_ONLY)
 218         USB_INT_Enable(USB_INT_SUSPEND);
 219         USB_INT_Enable(USB_INT_EORSTI);
 220         #if defined(CONTROL_ONLY_DEVICE)
 221         UENUM = ENDPOINT_CONTROLEP;
 222         #endif
 223
 224         #elif defined(USB_HOST_ONLY)
 225         USB_Host_HostMode_On();
 226
 227         USB_Host_VBUS_Auto_Off();
 228         USB_OTGPAD_Off();
 229
 230         USB_Host_VBUS_Manual_Enable();
 231         USB_Host_VBUS_Manual_On();
 232
 233         USB_INT_Enable(USB_INT_SRPI);
 234         USB_INT_Enable(USB_INT_BCERRI);
 235         #else
 236         if (USB_CurrentMode == USB_MODE_DEVICE)
 237         {
 238                 USB_INT_Enable(USB_INT_SUSPEND);
 239                 USB_INT_Enable(USB_INT_EORSTI);
 240
 241                 #if defined(CONTROL_ONLY_DEVICE)
 242                 UENUM = ENDPOINT_CONTROLEP;
 243                 #endif
 244         }
 245         else if (USB_CurrentMode == USB_MODE_HOST)
 246         {
 247                 USB_Host_HostMode_On();
 248
 249                 USB_Host_VBUS_Auto_Off();
 250                 USB_OTGPAD_Off();
 251
 252                 USB_Host_VBUS_Manual_Enable();
 253                 USB_Host_VBUS_Manual_On();
 254
 255                 USB_INT_Enable(USB_INT_SRPI);
 256                 USB_INT_Enable(USB_INT_BCERRI);
 257         }
 258         #endif
 259 }