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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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_XMEGA)
  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 /* Ugly workaround to ensure an aligned table, since __BIGGEST_ALIGNMENT__ == 1 for the 8-bit AVR-GCC toolchain */
  47 uint8_t USB_EndpointTable[sizeof(USB_EndpointTable_t) + 1];
  48
  49 void USB_Init(
  50                #if defined(USB_CAN_BE_BOTH)
  51                const uint8_t Mode
  52                #endif
  53
  54                #if (defined(USB_CAN_BE_BOTH) && !defined(USE_STATIC_OPTIONS))
  55                ,
  56                #elif (!defined(USB_CAN_BE_BOTH) && defined(USE_STATIC_OPTIONS))
  57                void
  58                #endif
  59
  60                #if !defined(USE_STATIC_OPTIONS)
  61                const uint8_t Options
  62                #endif
  63                )
  64 {
  65         #if !defined(USE_STATIC_OPTIONS)
  66         USB_Options = Options;
  67         #endif
  68
  69         uint_reg_t CurrentGlobalInt = GetGlobalInterruptMask();
  70         GlobalInterruptDisable();
  71
  72         NVM.CMD  = NVM_CMD_READ_CALIB_ROW_gc;
  73         USB.CAL0 = pgm_read_byte(offsetof(NVM_PROD_SIGNATURES_t, USBCAL0));
  74         USB.CAL1 = pgm_read_byte(offsetof(NVM_PROD_SIGNATURES_t, USBCAL1));
  75         NVM.CMD  = NVM_CMD_NO_OPERATION_gc;
  76
  77         /* Ugly workaround to ensure an aligned table, since __BIGGEST_ALIGNMENT__ == 1 for the 8-bit AVR-GCC toolchain */
  78         USB.EPPTR = ((intptr_t)&USB_EndpointTable[1] & ~(1 << 0));
  79         USB.CTRLA = (USB_STFRNUM_bm | ((ENDPOINT_TOTAL_ENDPOINTS - 1) << USB_MAXEP_gp));
  80
  81         if ((USB_Options & USB_OPT_BUSEVENT_PRIHIGH) == USB_OPT_BUSEVENT_PRIHIGH)
  82           USB.INTCTRLA = (3 << USB_INTLVL_gp);
  83         else if ((USB_Options & USB_OPT_BUSEVENT_PRIMED) == USB_OPT_BUSEVENT_PRIMED)
  84           USB.INTCTRLA = (2 << USB_INTLVL_gp);
  85         else
  86           USB.INTCTRLA = (1 << USB_INTLVL_gp);
  87
  88         SetGlobalInterruptMask(CurrentGlobalInt);
  89
  90         #if defined(USB_CAN_BE_BOTH)
  91         USB_CurrentMode = Mode;
  92         #endif
  93
  94         USB_IsInitialized = true;
  95
  96         USB_ResetInterface();
  97 }
  98
  99 void USB_Disable(void)
 100 {
 101         USB_INT_DisableAllInterrupts();
 102         USB_INT_ClearAllInterrupts();
 103
 104         USB_Detach();
 105         USB_Controller_Disable();
 106
 107         USB_IsInitialized = false;
 108 }
 109
 110 void USB_ResetInterface(void)
 111 {
 112         uint8_t PrescalerNeeded;
 113         uint8_t nbit = 0;
 114
 115         #if defined(USB_DEVICE_OPT_FULLSPEED)
 116         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 117           PrescalerNeeded = F_USB / 6000000;
 118         else
 119           PrescalerNeeded = F_USB / 48000000;
 120         #else
 121         PrescalerNeeded = F_USB / 6000000;
 122         #endif
 123
 124         while (PrescalerNeeded && nbit < 7) {
 125                 PrescalerNeeded >>= 1;
 126                 nbit++;
 127         }
 128
 129         CLK.USBCTRL = (nbit - 1) << CLK_USBPSDIV_gp;
 130
 131         if (USB_Options & USB_OPT_PLLCLKSRC)
 132           CLK.USBCTRL |= (CLK_USBSRC_PLL_gc   | CLK_USBSEN_bm);
 133         else
 134           CLK.USBCTRL |= (CLK_USBSRC_RC32M_gc | CLK_USBSEN_bm);
 135
 136         USB_Device_SetDeviceAddress(0);
 137
 138         USB_INT_DisableAllInterrupts();
 139         USB_INT_ClearAllInterrupts();
 140
 141         USB_Controller_Reset();
 142         USB_Init_Device();
 143 }
 144
 145 #if defined(USB_CAN_BE_DEVICE)
 146 static void USB_Init_Device(void)
 147 {
 148         USB_DeviceState                 = DEVICE_STATE_Unattached;
 149         USB_Device_ConfigurationNumber  = 0;
 150
 151         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 152         USB_Device_RemoteWakeupEnabled  = false;
 153         #endif
 154
 155         #if !defined(NO_DEVICE_SELF_POWER)
 156         USB_Device_CurrentlySelfPowered = false;
 157         #endif
 158
 159         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 160         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 161
 162         #if defined(ARCH_HAS_MULTI_ADDRESS_SPACE) && \
 163             !(defined(USE_FLASH_DESCRIPTORS) || defined(USE_EEPROM_DESCRIPTORS) || defined(USE_RAM_DESCRIPTORS))
 164         uint8_t DescriptorAddressSpace;
 165
 166         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr, &DescriptorAddressSpace) != NO_DESCRIPTOR)
 167         {
 168                 if (DescriptorAddressSpace == MEMSPACE_FLASH)
 169                   USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 170                 else if (DescriptorAddressSpace == MEMSPACE_EEPROM)
 171                   USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 172                 else
 173                   USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 174         }
 175         #else
 176         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 177         {
 178                 #if defined(USE_RAM_DESCRIPTORS)
 179                 USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 180                 #elif defined(USE_EEPROM_DESCRIPTORS)
 181                 USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 182                 #else
 183                 USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 184                 #endif
 185         }
 186         #endif
 187         #endif
 188
 189         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 190           USB_Device_SetLowSpeed();
 191         else
 192           USB_Device_SetFullSpeed();
 193
 194         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 195                                                            USB_Device_ControlEndpointSize, 1);
 196
 197         USB_INT_Enable(USB_INT_BUSEVENTI);
 198
 199         USB_Attach();
 200 }
 201 #endif
 202
 203 #endif