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 #include "USBController.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_DEVICE)
  76         {
  77                 UHWCON |=  (1 << UIMOD);
  78         }
  79         else if (Mode == USB_MODE_HOST)
  80         {
  81                 UHWCON &= ~(1 << UIMOD);
  82         }
  83         else
  84         {
  85                 UHWCON |=  (1 << UIDE);
  86         }
  87         #endif
  88
  89         USB_ResetInterface();
  90
  91         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  92         USB_OTGPAD_On();
  93         #endif
  94
  95         USB_IsInitialized = true;
  96 }
  97
  98 void USB_ShutDown(void)
  99 {
 100         USB_ResetInterface();
 101         USB_Detach();
 102         USB_Controller_Disable();
 103
 104         USB_INT_DisableAllInterrupts();
 105         USB_INT_ClearAllInterrupts();
 106
 107         #if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 108         UHWCON &= ~(1 << UIMOD);
 109         #endif
 110
 111         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 112           USB_PLL_Off();
 113
 114         USB_REG_Off();
 115
 116         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 117         USB_OTGPAD_Off();
 118         #endif
 119
 120         #if defined(USB_CAN_BE_BOTH)
 121         UHWCON &= ~(1 << UIDE);
 122         #endif
 123
 124         USB_IsInitialized = false;
 125
 126         #if defined(USB_CAN_BE_BOTH)
 127         USB_CurrentMode = USB_MODE_NONE;
 128         #endif
 129 }
 130
 131 void USB_ResetInterface(void)
 132 {
 133         USB_INT_DisableAllInterrupts();
 134         USB_INT_ClearAllInterrupts();
 135
 136         #if defined(USB_CAN_BE_HOST)
 137         USB_HostState   = HOST_STATE_Unattached;
 138         #endif
 139
 140         #if defined(USB_CAN_BE_DEVICE)
 141         USB_DeviceState = DEVICE_STATE_Unattached;
 142         USB_ConfigurationNumber  = 0;
 143
 144         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 145         USB_RemoteWakeupEnabled  = false;
 146         #endif
 147
 148         #if !defined(NO_DEVICE_SELF_POWER)
 149         USB_CurrentlySelfPowered = false;
 150         #endif
 151         #endif
 152
 153         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 154         {
 155                 #if defined(USB_SERIES_4_AVR)
 156                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 157                 #endif
 158
 159                 USB_PLL_On();
 160                 while (!(USB_PLL_IsReady()));
 161         }
 162
 163         USB_Controller_Reset();
 164
 165         #if defined(USB_CAN_BE_BOTH)
 166         if (UHWCON & (1 << UIDE))
 167         {
 168                 USB_INT_Clear(USB_INT_IDTI);
 169                 USB_INT_Enable(USB_INT_IDTI);
 170                 USB_CurrentMode = USB_GetUSBModeFromUID();
 171         }
 172         #endif
 173
 174         if (!(USB_Options & USB_OPT_REG_DISABLED))
 175           USB_REG_On();
 176         else
 177           USB_REG_Off();
 178
 179         USB_CLK_Unfreeze();
 180
 181         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)))
 182         if (USB_CurrentMode == USB_MODE_DEVICE)
 183         {
 184                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 185                   USB_Device_SetLowSpeed();
 186                 else
 187                   USB_Device_SetFullSpeed();
 188         }
 189         #endif
 190
 191         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 192         if (USB_CurrentMode == USB_MODE_DEVICE)
 193         {
 194                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 195
 196                 if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 197                 {
 198                         #if defined(USE_RAM_DESCRIPTORS)
 199                         USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 200                         #elif defined(USE_EEPROM_DESCRIPTORS)
 201                         USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 202                         #else
 203                         USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 204                         #endif
 205                 }
 206         }
 207         #endif
 208
 209         USB_Attach();
 210
 211         #if defined(USB_DEVICE_ONLY)
 212         USB_INT_Clear(USB_INT_SUSPEND);
 213         USB_INT_Enable(USB_INT_SUSPEND);
 214         USB_INT_Clear(USB_INT_EORSTI);
 215         USB_INT_Enable(USB_INT_EORSTI);
 216
 217         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 218         USB_INT_Enable(USB_INT_VBUS);
 219         #endif
 220         #elif defined(USB_HOST_ONLY)
 221         USB_Host_HostMode_On();
 222
 223         USB_Host_VBUS_Auto_Off();
 224         USB_OTGPAD_Off();
 225
 226         USB_Host_VBUS_Manual_Enable();
 227         USB_Host_VBUS_Manual_On();
 228
 229         USB_INT_Enable(USB_INT_SRPI);
 230         USB_INT_Enable(USB_INT_BCERRI);
 231         #else
 232         if (USB_CurrentMode == USB_MODE_DEVICE)
 233         {
 234                 USB_INT_Clear(USB_INT_SUSPEND);
 235                 USB_INT_Enable(USB_INT_SUSPEND);
 236                 USB_INT_Clear(USB_INT_EORSTI);
 237                 USB_INT_Enable(USB_INT_EORSTI);
 238
 239                 #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 240                 USB_INT_Enable(USB_INT_VBUS);
 241                 #endif
 242
 243                 Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 244                                            ENDPOINT_DIR_OUT, USB_ControlEndpointSize,
 245                                            ENDPOINT_BANK_SINGLE);
 246         }
 247         else if (USB_CurrentMode == USB_MODE_HOST)
 248         {
 249                 USB_Host_HostMode_On();
 250
 251                 USB_Host_VBUS_Auto_Off();
 252                 USB_OTGPAD_Off();
 253
 254                 USB_Host_VBUS_Manual_Enable();
 255                 USB_Host_VBUS_Manual_On();
 256
 257                 USB_INT_Enable(USB_INT_SRPI);
 258                 USB_INT_Enable(USB_INT_BCERRI);
 259         }
 260         #endif
 261 }