LUFA/Drivers/USB/LowLevel/LowLevel.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 #include "LowLevel.h"
  33
  34 #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
  35 volatile uint8_t USB_CurrentMode = USB_MODE_NONE;
  36 #endif
  37
  38 #if !defined(USE_STATIC_OPTIONS)
  39 volatile uint8_t USB_Options;
  40 #endif
  41
  42 void USB_Init(
  43                #if defined(USB_CAN_BE_BOTH)
  44                const uint8_t Mode
  45                #endif
  46
  47                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  48                ,
  49                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  50                void
  51                #endif
  52
  53                #if !defined(USE_STATIC_OPTIONS)
  54                const uint8_t Options
  55                #endif
  56                )
  57 {
  58         #if defined(USB_CAN_BE_BOTH)
  59         USB_CurrentMode = Mode;
  60         #endif
  61
  62         #if !defined(USE_STATIC_OPTIONS)
  63         USB_Options = Options;
  64         #endif
  65
  66         #if defined(USB_CAN_BE_HOST)
  67         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  68         #endif
  69
  70         #if defined(USB_DEVICE_ONLY) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
  71         UHWCON |= (1 << UIMOD);
  72         #elif defined(USB_HOST_ONLY)
  73         UHWCON &= ~(1 << UIMOD);
  74         #elif defined(USB_CAN_BE_BOTH)
  75         if (Mode == USB_MODE_UID)
  76         {
  77                 UHWCON |=  (1 << UIDE);
  78
  79                 USB_INT_Clear(USB_INT_IDTI);
  80                 USB_INT_Enable(USB_INT_IDTI);
  81
  82                 USB_CurrentMode = USB_GetUSBModeFromUID();
  83         }
  84         else if (Mode == USB_MODE_DEVICE)
  85         {
  86                 UHWCON |=  (1 << UIMOD);
  87         }
  88         else if (Mode == USB_MODE_HOST)
  89         {
  90                 UHWCON &= ~(1 << UIMOD);
  91         }
  92         else
  93         {
  94                 EVENT_USB_InitFailure(USB_INITERROR_NoUSBModeSpecified);
  95                 return;
  96         }
  97         #endif
  98
  99         USB_ResetInterface();
 100
 101         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 102         USB_OTGPAD_On();
 103         #endif
 104
 105         USB_IsInitialized = true;
 106 }
 107
 108 void USB_ShutDown(void)
 109 {
 110         USB_ResetInterface();
 111         USB_Detach();
 112         USB_Controller_Disable();
 113
 114         USB_INT_DisableAllInterrupts();
 115         USB_INT_ClearAllInterrupts();
 116
 117         #if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 118         UHWCON &= ~(1 << UIMOD);
 119         #endif
 120
 121         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 122           USB_PLL_Off();
 123
 124         USB_REG_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(USB_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
 154         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 155         USB_RemoteWakeupEnabled  = false;
 156         #endif
 157
 158         #if !defined(NO_DEVICE_SELF_POWER)
 159         USB_CurrentlySelfPowered = false;
 160         #endif
 161         #endif
 162
 163         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 164         {
 165                 #if defined(USB_SERIES_4_AVR)
 166                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 167                 #endif
 168
 169                 USB_PLL_On();
 170                 while (!(USB_PLL_IsReady()));
 171         }
 172
 173         USB_Controller_Reset();
 174
 175         #if defined(USB_CAN_BE_BOTH)
 176         if (UHWCON & (1 << UIDE))
 177         {
 178                 USB_INT_Clear(USB_INT_IDTI);
 179                 USB_INT_Enable(USB_INT_IDTI);
 180                 USB_CurrentMode = USB_GetUSBModeFromUID();
 181         }
 182         #endif
 183
 184         if (!(USB_Options & USB_OPT_REG_DISABLED))
 185           USB_REG_On();
 186         else
 187           USB_REG_Off();
 188
 189         USB_CLK_Unfreeze();
 190
 191         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 192         if (USB_CurrentMode == USB_MODE_DEVICE)
 193         {
 194                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 195                   USB_Device_SetLowSpeed();
 196                 else
 197                   USB_Device_SetFullSpeed();
 198         }
 199         #endif
 200
 201         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 202         if (USB_CurrentMode == USB_MODE_DEVICE)
 203         {
 204                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 205
 206                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 207                 {
 208                         #if defined(USE_RAM_DESCRIPTORS)
 209                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 210                         #elif defined(USE_EEPROM_DESCRIPTORS)
 211                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 212                         #else
 213                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 214                         #endif
 215                 }
 216         }
 217         #endif
 218
 219         USB_Attach();
 220
 221         #if defined(USB_DEVICE_ONLY)
 222         USB_INT_Clear(USB_INT_SUSPEND);
 223         USB_INT_Enable(USB_INT_SUSPEND);
 224         USB_INT_Clear(USB_INT_EORSTI);
 225         USB_INT_Enable(USB_INT_EORSTI);
 226
 227         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 228         USB_INT_Enable(USB_INT_VBUS);
 229         #endif
 230         #elif defined(USB_HOST_ONLY)
 231         USB_Host_HostMode_On();
 232
 233         USB_Host_VBUS_Auto_Off();
 234         USB_OTGPAD_Off();
 235
 236         USB_Host_VBUS_Manual_Enable();
 237         USB_Host_VBUS_Manual_On();
 238
 239         USB_INT_Enable(USB_INT_SRPI);
 240         USB_INT_Enable(USB_INT_BCERRI);
 241         #else
 242         if (USB_CurrentMode == USB_MODE_DEVICE)
 243         {
 244                 USB_INT_Clear(USB_INT_SUSPEND);
 245                 USB_INT_Enable(USB_INT_SUSPEND);
 246                 USB_INT_Clear(USB_INT_EORSTI);
 247                 USB_INT_Enable(USB_INT_EORSTI);
 248
 249                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 250                 USB_INT_Enable(USB_INT_VBUS);
 251                 #endif
 252
 253                 #if defined(CONTROL_ONLY_DEVICE)
 254                 UENUM = ENDPOINT_CONTROLEP;
 255                 #endif
 256         }
 257         else if (USB_CurrentMode == USB_MODE_HOST)
 258         {
 259                 USB_Host_HostMode_On();
 260
 261                 USB_Host_VBUS_Auto_Off();
 262                 USB_OTGPAD_Off();
 263
 264                 USB_Host_VBUS_Manual_Enable();
 265                 USB_Host_VBUS_Manual_On();
 266
 267                 USB_INT_Enable(USB_INT_SRPI);
 268                 USB_INT_Enable(USB_INT_BCERRI);
 269         }
 270         #endif
 271 }