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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2019.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2019  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
 114         #if defined(USB_DEVICE_OPT_FULLSPEED)
 115         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 116           PrescalerNeeded = F_USB / 6000000;
 117         else
 118           PrescalerNeeded = F_USB / 48000000;
 119         #else
 120         PrescalerNeeded = F_USB / 6000000;
 121         #endif
 122
 123         uint8_t DividerIndex = 0;
 124         while (PrescalerNeeded > 0)
 125         {
 126                 DividerIndex++;
 127                 PrescalerNeeded >>= 1;
 128         }
 129
 130         CLK.USBCTRL = (DividerIndex - 1) << CLK_USBPSDIV_gp;
 131
 132         if (USB_Options & USB_OPT_PLLCLKSRC)
 133           CLK.USBCTRL |= (CLK_USBSRC_PLL_gc   | CLK_USBSEN_bm);
 134         else
 135           CLK.USBCTRL |= (CLK_USBSRC_RC32M_gc | CLK_USBSEN_bm);
 136
 137         USB_Device_SetDeviceAddress(0);
 138
 139         USB_INT_DisableAllInterrupts();
 140         USB_INT_ClearAllInterrupts();
 141
 142         USB_Controller_Reset();
 143         USB_Init_Device();
 144 }
 145
 146 #if defined(USB_CAN_BE_DEVICE)
 147 static void USB_Init_Device(void)
 148 {
 149         USB_DeviceState                 = DEVICE_STATE_Unattached;
 150         USB_Device_ConfigurationNumber  = 0;
 151
 152         #if !defined(NO_DEVICE_REMOTE_WAKEUP)
 153         USB_Device_RemoteWakeupEnabled  = false;
 154         #endif
 155
 156         #if !defined(NO_DEVICE_SELF_POWER)
 157         USB_Device_CurrentlySelfPowered = false;
 158         #endif
 159
 160         #if !defined(FIXED_CONTROL_ENDPOINT_SIZE)
 161         USB_Descriptor_Device_t* DeviceDescriptorPtr;
 162
 163         #if defined(ARCH_HAS_MULTI_ADDRESS_SPACE) && \
 164             !(defined(USE_FLASH_DESCRIPTORS) || defined(USE_EEPROM_DESCRIPTORS) || defined(USE_RAM_DESCRIPTORS))
 165         uint8_t DescriptorAddressSpace;
 166
 167         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr, &DescriptorAddressSpace) != NO_DESCRIPTOR)
 168         {
 169                 if (DescriptorAddressSpace == MEMSPACE_FLASH)
 170                   USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 171                 else if (DescriptorAddressSpace == MEMSPACE_EEPROM)
 172                   USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 173                 else
 174                   USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 175         }
 176         #else
 177         if (CALLBACK_USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 178         {
 179                 #if defined(USE_RAM_DESCRIPTORS)
 180                 USB_Device_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 181                 #elif defined(USE_EEPROM_DESCRIPTORS)
 182                 USB_Device_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 183                 #else
 184                 USB_Device_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 185                 #endif
 186         }
 187         #endif
 188         #endif
 189
 190         if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 191           USB_Device_SetLowSpeed();
 192         else
 193           USB_Device_SetFullSpeed();
 194
 195         Endpoint_ConfigureEndpoint(ENDPOINT_CONTROLEP, EP_TYPE_CONTROL,
 196                                                            USB_Device_ControlEndpointSize, 1);
 197
 198         USB_INT_Enable(USB_INT_BUSEVENTI);
 199
 200         USB_Attach();
 201 }
 202 #endif
 203
 204 #endif