LUFA/Drivers/USB/Core/XMEGA/USBController_XMEGA.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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 #define  __INCLUDE_FROM_USB_CONTROLLER_C
  33 #include "../USBController.h"
  34
  35 #if (!defined(USB_HOST_ONLY) && !defined(USB_DEVICE_ONLY))
  36 volatile uint8_t USB_CurrentMode = USB_MODE_None;
  37 #endif
  38
  39 #if !defined(USE_STATIC_OPTIONS)
  40 volatile uint8_t USB_Options;
  41 #endif
  42
  43 void USB_Init(
  44                #if defined(USB_CAN_BE_BOTH)
  45                const uint8_t Mode
  46                #endif
  47
  48                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  49                ,
  50                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  51                void
  52                #endif
  53
  54                #if !defined(USE_STATIC_OPTIONS)
  55                const uint8_t Options
  56                #endif
  57                )
  58 {
  59         #if !defined(USE_STATIC_OPTIONS)
  60         USB_Options = Options;
  61         #endif
  62
  63         USB_IsInitialized = true;
  64
  65         USB_ResetInterface();
  66 }
  67
  68 void USB_Disable(void)
  69 {
  70         USB_INT_DisableAllInterrupts();
  71         USB_INT_ClearAllInterrupts();
  72
  73         USB_Detach();
  74         USB_Controller_Disable();
  75
  76         USB_IsInitialized = false;
  77 }
  78
  79 void USB_ResetInterface(void)
  80 {
  81         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
  82           CLK.USBCTRL = ((((F_USB / 6000000) - 1) << CLK_USBPSDIV_gp) | CLK_USBSRC_PLL_gc | CLK_USBEN_bm);
  83         else
  84           CLK.USBCTRL = ((((F_USB / 48000000) - 1) << CLK_USBPSDIV_gp) | CLK_USBSRC_PLL_gc | CLK_USBEN_bm);
  85
  86         USB_INT_DisableAllInterrupts();
  87         USB_INT_ClearAllInterrupts();
  88
  89         USB_Controller_Reset();
  90         USB_Init_Device();
  91 }
  92
  93 #if defined(USB_CAN_BE_DEVICE)
  94 static void USB_Init_Device(void)
  95 {
  96         USB_DeviceState                 = DEVICE_STATE_Unattached;
  97         USB_Device_ConfigurationNumber  = 0;
  98
  99         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 100         USB_Device_RemoteWakeupEnabled  = false;
 101         #endif
 102
 103         #if !defined(NO_DEVICE_SELF_POWER)
 104         USB_Device_CurrentlySelfPowered = false;
 105         #endif
 106
 107         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 108         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 109
 110         #if defined(ARCH_HAS_MULTI_ADDRESS_SPACE) && \
 111             !(defined(USE_FLASH_DESCRIPTORS) || defined(USE_EEPROM_DESCRIPTORS) || defined(USE_RAM_DESCRIPTORS))
 112         uint8_t DescriptorAddressSpace;
 113
 114         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr, &DescriptorAddressSpace) != NO_DESCRIPTOR)
 115         {
 116                 if (DescriptorAddressSpace == MEMSPACE_FLASH)
 117                   USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 118                 else if (DescriptorAddressSpace == MEMSPACE_EEPROM)
 119                   USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 120                 else
 121                   USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 122         }
 123         #else
 124         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 125         {
 126                 #if defined(USE_RAM_DESCRIPTORS)
 127                 USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 128                 #elif defined(USE_EEPROM_DESCRIPTORS)
 129                 USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 130                 #else
 131                 USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 132                 #endif
 133         }
 134         #endif
 135         #endif
 136
 137         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 138           USB_Device_SetLowSpeed();
 139         else
 140           USB_Device_SetFullSpeed();
 141
 142         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 143                                                            ENDPOINT_DIR_OUT, USB_Device_ControlEndpointSize,
 144                                                            ENDPOINT_BANK_SINGLE);
 145
 146         USB_Attach();
 147 }
 148 #endif