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         sei();
 108 }
 109
 110 void USB_ShutDown(void)
 111 {
 112         USB_ResetInterface();
 113         USB_Detach();
 114         USB_Controller_Disable();
 115
 116         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 117           USB_PLL_Off();
 118
 119         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 120         USB_OTGPAD_Off();
 121         #endif
 122
 123         #if defined(USB_CAN_BE_BOTH)
 124         UHWCON &= ~(1 << UIDE);
 125         #endif
 126
 127         USB_IsInitialized = false;
 128
 129         #if defined(USB_CAN_BE_BOTH)
 130         USB_CurrentMode = USB_MODE_NONE;
 131         #endif
 132 }
 133
 134 void USB_ResetInterface(void)
 135 {
 136         USB_INT_DisableAllInterrupts();
 137         USB_INT_ClearAllInterrupts();
 138
 139         #if defined(USB_CAN_BE_HOST)
 140         USB_HostState   = HOST_STATE_Unattached;
 141         #endif
 142
 143         #if defined(USB_CAN_BE_DEVICE)
 144         USB_DeviceState = DEVICE_STATE_Unattached;
 145         USB_ConfigurationNumber  = 0;
 146
 147         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 148                 USB_RemoteWakeupEnabled  = false;
 149         #endif
 150
 151         #if !defined(NO_DEVICE_SELF_POWER)
 152                 USB_CurrentlySelfPowered = false;
 153         #endif
 154         #endif
 155
 156         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 157         {
 158                 #if defined(USB_SERIES_4_AVR)
 159                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 160                 #endif
 161
 162                 USB_PLL_On();
 163                 while (!(USB_PLL_IsReady()));
 164         }
 165
 166         USB_Controller_Reset();
 167
 168         #if defined(USB_CAN_BE_BOTH)
 169         if (UHWCON & (1 << UIDE))
 170         {
 171                 USB_INT_Clear(USB_INT_IDTI);
 172                 USB_INT_Enable(USB_INT_IDTI);
 173                 USB_CurrentMode = USB_GetUSBModeFromUID();
 174         }
 175         #endif
 176
 177         if (!(USB_Options & USB_OPT_REG_DISABLED))
 178           USB_REG_On();
 179         else
 180           USB_REG_Off();
 181
 182         USB_CLK_Unfreeze();
 183
 184         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 185         if (USB_CurrentMode == USB_MODE_DEVICE)
 186         {
 187                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 188                   USB_Device_SetLowSpeed();
 189                 else
 190                   USB_Device_SetFullSpeed();
 191         }
 192         #endif
 193
 194         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 195         if (USB_CurrentMode == USB_MODE_DEVICE)
 196         {
 197                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 198
 199                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 200                 {
 201                         #if defined(USE_RAM_DESCRIPTORS)
 202                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 203                         #elif defined(USE_EEPROM_DESCRIPTORS)
 204                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 205                         #else
 206                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 207                         #endif
 208                 }
 209         }
 210         #endif
 211
 212         USB_Attach();
 213
 214         #if defined(USB_DEVICE_ONLY)
 215         USB_INT_Clear(USB_INT_SUSPEND);
 216         USB_INT_Enable(USB_INT_SUSPEND);
 217         USB_INT_Clear(USB_INT_EORSTI);
 218         USB_INT_Enable(USB_INT_EORSTI);
 219
 220                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 221                 USB_INT_Enable(USB_INT_VBUS);
 222                 #endif
 223         #elif defined(USB_HOST_ONLY)
 224         USB_Host_HostMode_On();
 225
 226         USB_Host_VBUS_Auto_Off();
 227         USB_OTGPAD_Off();
 228
 229         USB_Host_VBUS_Manual_Enable();
 230         USB_Host_VBUS_Manual_On();
 231
 232         USB_INT_Enable(USB_INT_SRPI);
 233         USB_INT_Enable(USB_INT_BCERRI);
 234         #else
 235         if (USB_CurrentMode == USB_MODE_DEVICE)
 236         {
 237                 USB_INT_Clear(USB_INT_SUSPEND);
 238                 USB_INT_Enable(USB_INT_SUSPEND);
 239                 USB_INT_Clear(USB_INT_EORSTI);
 240                 USB_INT_Enable(USB_INT_EORSTI);
 241
 242                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 243                 USB_INT_Enable(USB_INT_VBUS);
 244                 #endif
 245
 246                 #if defined(CONTROL_ONLY_DEVICE)
 247                 UENUM = ENDPOINT_CONTROLEP;
 248                 #endif
 249         }
 250         else if (USB_CurrentMode == USB_MODE_HOST)
 251         {
 252                 USB_Host_HostMode_On();
 253
 254                 USB_Host_VBUS_Auto_Off();
 255                 USB_OTGPAD_Off();
 256
 257                 USB_Host_VBUS_Manual_Enable();
 258                 USB_Host_VBUS_Manual_On();
 259
 260                 USB_INT_Enable(USB_INT_SRPI);
 261                 USB_INT_Enable(USB_INT_BCERRI);
 262         }
 263         #endif
 264 }