LUFA/Drivers/USB/Core/AVR8/USBController_AVR8.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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 disclaims 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 "../../../../Common/Common.h"
  32 #if (ARCH == ARCH_AVR8)
  33
  34 #define  __INCLUDE_FROM_USB_DRIVER
  35 #define  __INCLUDE_FROM_USB_CONTROLLER_C
  36 #include "../USBController.h"
  37
  38 #if defined(USB_CAN_BE_BOTH)
  39 volatile uint8_t USB_CurrentMode = USB_MODE_None;
  40 #endif
  41
  42 #if !defined(USE_STATIC_OPTIONS)
  43 volatile uint8_t USB_Options;
  44 #endif
  45
  46 void USB_Init(
  47                #if defined(USB_CAN_BE_BOTH)
  48                const uint8_t Mode
  49                #endif
  50
  51                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  52                ,
  53                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  54                void
  55                #endif
  56
  57                #if !defined(USE_STATIC_OPTIONS)
  58                const uint8_t Options
  59                #endif
  60                )
  61 {
  62         #if !defined(USE_STATIC_OPTIONS)
  63         USB_Options = Options;
  64         #endif
  65
  66         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
  67         /* Workaround for AVR8 bootloaders that fail to turn off the OTG pad before running
  68          * the loaded application. This causes VBUS detection to fail unless we first force
  69          * it off to reset it. */
  70         USB_OTGPAD_Off();
  71         #endif
  72
  73         if (!(USB_Options & USB_OPT_REG_DISABLED))
  74           USB_REG_On();
  75         else
  76           USB_REG_Off();
  77
  78         if (!(USB_Options & USB_OPT_MANUAL_PLL))
  79         {
  80                 #if defined(USB_SERIES_4_AVR)
  81                 PLLFRQ = (1 << PDIV2);
  82                 #endif
  83         }
  84
  85         #if defined(USB_CAN_BE_BOTH)
  86         if (Mode == USB_MODE_UID)
  87         {
  88                 UHWCON |=  (1 << UIDE);
  89                 USB_INT_Enable(USB_INT_IDTI);
  90                 USB_CurrentMode = USB_GetUSBModeFromUID();
  91         }
  92         else
  93         {
  94                 UHWCON &= ~(1 << UIDE);
  95                 USB_CurrentMode = Mode;
  96         }
  97         #endif
  98
  99         USB_IsInitialized = true;
 100
 101         USB_ResetInterface();
 102 }
 103
 104 void USB_Disable(void)
 105 {
 106         USB_INT_DisableAllInterrupts();
 107         USB_INT_ClearAllInterrupts();
 108
 109         USB_Detach();
 110         USB_Controller_Disable();
 111
 112         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 113           USB_PLL_Off();
 114
 115         USB_REG_Off();
 116
 117         #if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
 118         USB_OTGPAD_Off();
 119         #endif
 120
 121         #if defined(USB_CAN_BE_BOTH)
 122         USB_CurrentMode = USB_MODE_None;
 123         #endif
 124
 125         USB_IsInitialized = false;
 126 }
 127
 128 void USB_ResetInterface(void)
 129 {
 130         #if defined(USB_CAN_BE_BOTH)
 131         bool UIDModeSelectEnabled = ((UHWCON & (1 << UIDE)) != 0);
 132         #endif
 133
 134         USB_INT_DisableAllInterrupts();
 135         USB_INT_ClearAllInterrupts();
 136
 137         USB_Controller_Reset();
 138
 139         #if defined(USB_CAN_BE_BOTH)
 140         if (UIDModeSelectEnabled)
 141           USB_INT_Enable(USB_INT_IDTI);
 142         #endif
 143
 144         USB_CLK_Unfreeze();
 145
 146         if (USB_CurrentMode == USB_MODE_Device)
 147         {
 148                 #if defined(USB_CAN_BE_DEVICE)
 149                 #if (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 150                 UHWCON |=  (1 << UIMOD);
 151                 #endif
 152
 153                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 154                 {
 155                         #if defined(USB_SERIES_2_AVR)
 156                         USB_PLL_On();
 157                         while (!(USB_PLL_IsReady()));
 158                         #else
 159                         USB_PLL_Off();
 160                         #endif
 161                 }
 162
 163                 USB_Init_Device();
 164                 #endif
 165         }
 166         else if (USB_CurrentMode == USB_MODE_Host)
 167         {
 168                 #if defined(USB_CAN_BE_HOST)
 169                 UHWCON &= ~(1 << UIMOD);
 170
 171                 if (!(USB_Options & USB_OPT_MANUAL_PLL))
 172                 {
 173                         #if defined(USB_CAN_BE_HOST)
 174                         USB_PLL_On();
 175                         while (!(USB_PLL_IsReady()));
 176                         #endif
 177                 }
 178
 179                 USB_Init_Host();
 180                 #endif
 181         }
 182
 183         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 184         USB_OTGPAD_On();
 185         #endif
 186 }
 187
 188 #if defined(USB_CAN_BE_DEVICE)
 189 static void USB_Init_Device(void)
 190 {
 191         USB_DeviceState                 = DEVICE_STATE_Unattached;
 192         USB_Device_ConfigurationNumber  = 0;
 193
 194         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 195         USB_Device_RemoteWakeupEnabled  = false;
 196         #endif
 197
 198         #if !defined(NO_DEVICE_SELF_POWER)
 199         USB_Device_CurrentlySelfPowered = false;
 200         #endif
 201
 202         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 203         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 204
 205         #if defined(ARCH_HAS_MULTI_ADDRESS_SPACE) && \
 206             !(defined(USE_FLASH_DESCRIPTORS) || defined(USE_EEPROM_DESCRIPTORS) || defined(USE_RAM_DESCRIPTORS))
 207         uint8_t DescriptorAddressSpace;
 208
 209         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr, &DescriptorAddressSpace) != NO_DESCRIPTOR)
 210         {
 211                 if (DescriptorAddressSpace == MEMSPACE_FLASH)
 212                   USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 213                 else if (DescriptorAddressSpace == MEMSPACE_EEPROM)
 214                   USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 215                 else
 216                   USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 217         }
 218         #else
 219         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 220         {
 221                 #if defined(USE_RAM_DESCRIPTORS)
 222                 USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 223                 #elif defined(USE_EEPROM_DESCRIPTORS)
 224                 USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 225                 #else
 226                 USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 227                 #endif
 228         }
 229         #endif
 230         #endif
 231
 232         #if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
 233         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 234           USB_Device_SetLowSpeed();
 235         else
 236           USB_Device_SetFullSpeed();
 237
 238         USB_INT_Enable(USB_INT_VBUSTI);
 239         #endif
 240
 241         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 242                                                            USB_Device_ControlEndpointSize, 1);
 243
 244         USB_INT_Clear(USB_INT_SUSPI);
 245         USB_INT_Enable(USB_INT_SUSPI);
 246         USB_INT_Enable(USB_INT_EORSTI);
 247
 248         USB_Attach();
 249 }
 250 #endif
 251
 252 #if defined(USB_CAN_BE_HOST)
 253 static void USB_Init_Host(void)
 254 {
 255         USB_HostState                = HOST_STATE_Unattached;
 256         USB_Host_ConfigurationNumber = 0;
 257         USB_Host_ControlPipeSize     = PIPE_CONTROLPIPE_DEFAULT_SIZE;
 258
 259         USB_Host_HostMode_On();
 260
 261         USB_Host_VBUS_Auto_Off();
 262         USB_Host_VBUS_Manual_Enable();
 263         USB_Host_VBUS_Manual_On();
 264
 265         USB_INT_Enable(USB_INT_SRPI);
 266         USB_INT_Enable(USB_INT_BCERRI);
 267
 268         USB_Attach();
 269 }
 270 #endif
 271
 272 #endif