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         USB_ResetInterface();
 112         USB_Detach();
 113         USB_Controller_Disable();
 114
 115         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 116           USB_PLL_Off();
 117
 118         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 119         USB_OTGPAD_Off();
 120         #endif
 121
 122         #if defined(USB_CAN_BE_BOTH)
 123         UHWCON &= ~(1 << UIDE);
 124         #endif
 125
 126         USB_IsInitialized = false;
 127
 128         #if defined(USB_CAN_BE_BOTH)
 129         USB_CurrentMode = USB_MODE_NONE;
 130         #endif
 131 }
 132
 133 void USB_ResetInterface(void)
 134 {
 135         USB_INT_DisableAllInterrupts();
 136         USB_INT_ClearAllInterrupts();
 137
 138         #if defined(USB_CAN_BE_HOST)
 139         USB_HostState   = HOST_STATE_Unattached;
 140         #endif
 141
 142         #if defined(USB_CAN_BE_DEVICE)
 143         USB_DeviceState = DEVICE_STATE_Unattached;
 144         USB_ConfigurationNumber  = 0;
 145
 146         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 147                 USB_RemoteWakeupEnabled  = false;
 148         #endif
 149
 150         #if !defined(NO_DEVICE_SELF_POWER)
 151                 USB_CurrentlySelfPowered = false;
 152         #endif
 153         #endif
 154
 155         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 156         {
 157                 #if defined(USB_SERIES_4_AVR)
 158                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 159                 #endif
 160
 161                 USB_PLL_On();
 162                 while (!(USB_PLL_IsReady()));
 163         }
 164
 165         USB_Controller_Reset();
 166
 167         #if defined(USB_CAN_BE_BOTH)
 168         if (UHWCON & (1 << UIDE))
 169         {
 170                 USB_INT_Clear(USB_INT_IDTI);
 171                 USB_INT_Enable(USB_INT_IDTI);
 172                 USB_CurrentMode = USB_GetUSBModeFromUID();
 173         }
 174         #endif
 175
 176         if (!(USB_Options & USB_OPT_REG_DISABLED))
 177           USB_REG_On();
 178         else
 179           USB_REG_Off();
 180
 181         USB_CLK_Unfreeze();
 182
 183         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 184         if (USB_CurrentMode == USB_MODE_DEVICE)
 185         {
 186                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 187                   USB_Device_SetLowSpeed();
 188                 else
 189                   USB_Device_SetFullSpeed();
 190         }
 191         #endif
 192
 193         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 194         if (USB_CurrentMode == USB_MODE_DEVICE)
 195         {
 196                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 197
 198                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 199                 {
 200                         #if defined(USE_RAM_DESCRIPTORS)
 201                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 202                         #elif defined(USE_EEPROM_DESCRIPTORS)
 203                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 204                         #else
 205                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 206                         #endif
 207                 }
 208         }
 209         #endif
 210
 211         USB_Attach();
 212
 213         #if defined(USB_DEVICE_ONLY)
 214         USB_INT_Clear(USB_INT_SUSPEND);
 215         USB_INT_Enable(USB_INT_SUSPEND);
 216         USB_INT_Clear(USB_INT_EORSTI);
 217         USB_INT_Enable(USB_INT_EORSTI);
 218
 219                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 220                 USB_INT_Enable(USB_INT_VBUS);
 221                 #endif
 222         #elif defined(USB_HOST_ONLY)
 223         USB_Host_HostMode_On();
 224
 225         USB_Host_VBUS_Auto_Off();
 226         USB_OTGPAD_Off();
 227
 228         USB_Host_VBUS_Manual_Enable();
 229         USB_Host_VBUS_Manual_On();
 230
 231         USB_INT_Enable(USB_INT_SRPI);
 232         USB_INT_Enable(USB_INT_BCERRI);
 233         #else
 234         if (USB_CurrentMode == USB_MODE_DEVICE)
 235         {
 236                 USB_INT_Clear(USB_INT_SUSPEND);
 237                 USB_INT_Enable(USB_INT_SUSPEND);
 238                 USB_INT_Clear(USB_INT_EORSTI);
 239                 USB_INT_Enable(USB_INT_EORSTI);
 240
 241                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 242                 USB_INT_Enable(USB_INT_VBUS);
 243                 #endif
 244
 245                 #if defined(CONTROL_ONLY_DEVICE)
 246                 UENUM = ENDPOINT_CONTROLEP;
 247                 #endif
 248         }
 249         else if (USB_CurrentMode == USB_MODE_HOST)
 250         {
 251                 USB_Host_HostMode_On();
 252
 253                 USB_Host_VBUS_Auto_Off();
 254                 USB_OTGPAD_Off();
 255
 256                 USB_Host_VBUS_Manual_Enable();
 257                 USB_Host_VBUS_Manual_On();
 258
 259                 USB_INT_Enable(USB_INT_SRPI);
 260                 USB_INT_Enable(USB_INT_BCERRI);
 261         }
 262         #endif
 263 }