LUFA/Drivers/USB/LowLevel/LowLevel.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 #include "USBMode.h"
  32
  33 #include "LowLevel.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         USB_ShutDown();
  60
  61         #if defined(USB_CAN_BE_BOTH)
  62         USB_CurrentMode = Mode;
  63         #endif
  64
  65         #if !defined(USE_STATIC_OPTIONS)
  66         USB_Options = Options;
  67         #endif
  68
  69         #if defined(USB_CAN_BE_HOST)
  70         USB_ControlPipeSize = PIPE_CONTROLPIPE_DEFAULT_SIZE;
  71         #endif
  72
  73         #if defined(USB_DEVICE_ONLY) && defined(USB_FULL_CONTROLLER)
  74         UHWCON |= (1 << UIMOD);
  75         #elif defined(USB_HOST_ONLY)
  76         UHWCON &= ~(1 << UIMOD);
  77         #elif defined(USB_CAN_BE_BOTH)
  78         if (Mode == USB_MODE_UID)
  79         {
  80                 UHWCON |=  (1 << UIDE);
  81
  82                 USB_INT_Clear(USB_INT_IDTI);
  83                 USB_INT_Enable(USB_INT_IDTI);
  84
  85                 USB_CurrentMode = USB_GetUSBModeFromUID();
  86         }
  87         else if (Mode == USB_MODE_DEVICE)
  88         {
  89                 UHWCON |=  (1 << UIMOD);
  90         }
  91         else if (Mode == USB_MODE_HOST)
  92         {
  93                 UHWCON &= ~(1 << UIMOD);
  94         }
  95         else
  96         {
  97                 RAISE_EVENT(USB_PowerOnFail, POWERON_ERROR_NoUSBModeSpecified);
  98                 return;
  99         }
 100         #endif
 101
 102         USB_ResetInterface();
 103
 104         #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
 105         USB_OTGPAD_On();
 106         #endif
 107
 108         USB_IsInitialized = true;
 109
 110         sei();
 111 }
 112
 113 void USB_ShutDown(void)
 114 {
 115         if (USB_IsConnected)
 116           RAISE_EVENT(USB_Disconnect);
 117
 118         USB_Detach();
 119
 120         USB_INT_DisableAllInterrupts();
 121         USB_INT_ClearAllInterrupts();
 122
 123         USB_IsConnected   = false;
 124         USB_IsInitialized = false;
 125
 126         #if defined(USB_CAN_BE_HOST)
 127         USB_HostState = HOST_STATE_Unattached;
 128         #endif
 129
 130         #if defined(USB_CAN_BE_DEVICE)
 131         USB_ConfigurationNumber = 0;
 132         #endif
 133
 134         #if defined(CAN_BE_BOTH)
 135         USB_CurrentMode = USB_MODE_NONE;
 136         #endif
 137
 138         USB_Interface_Disable();
 139         USB_PLL_Off();
 140
 141         #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
 142         USB_OTGPAD_Off();
 143         #endif
 144
 145         #if defined(USB_CAN_BE_BOTH)
 146         UHWCON &= ~(1 << UIDE);
 147         #endif
 148 }
 149
 150 void USB_ResetInterface(void)
 151 {
 152         USB_INT_DisableAllInterrupts();
 153         USB_INT_ClearAllInterrupts();
 154
 155         USB_IsConnected          = false;
 156
 157         #if defined(USB_CAN_BE_HOST)
 158         USB_HostState            = HOST_STATE_Unattached;
 159         #endif
 160
 161         #if defined(USB_CAN_BE_DEVICE)
 162         USB_ConfigurationNumber  = 0;
 163         USB_IsSuspended          = false;
 164         USB_RemoteWakeupEnabled  = false;
 165         USB_CurrentlySelfPowered = false;
 166         #endif
 167
 168         if (!(USB_Options & USB_OPT_MANUAL_PLL))
 169         {
 170                 #if defined(USB_MODIFIED_FULL_CONTROLLER)
 171                 PLLFRQ = ((1 << PLLUSB) | (1 << PDIV3) | (1 << PDIV1));
 172                 #endif
 173
 174                 USB_PLL_On();
 175                 while (!(USB_PLL_IsReady()));
 176         }
 177
 178         USB_Interface_Reset();
 179
 180         #if defined(USB_CAN_BE_BOTH)
 181         if (UHWCON & (1 << UIDE))
 182         {
 183                 USB_INT_Clear(USB_INT_IDTI);
 184                 USB_INT_Enable(USB_INT_IDTI);
 185                 USB_CurrentMode = USB_GetUSBModeFromUID();
 186         }
 187         #endif
 188
 189         if (!(USB_Options & USB_OPT_REG_DISABLED))
 190           USB_REG_On();
 191
 192         USB_CLK_Unfreeze();
 193
 194         #if (defined(USB_CAN_BE_DEVICE) && (defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)))
 195         if (USB_CurrentMode == USB_MODE_DEVICE)
 196         {
 197                 if (USB_Options & USB_DEVICE_OPT_LOWSPEED)
 198                   USB_Device_SetLowSpeed();
 199                 else
 200                   USB_Device_SetHighSpeed();
 201
 202                 USB_INT_Enable(USB_INT_VBUS);
 203         }
 204         #endif
 205
 206         #if (defined(USB_CAN_BE_DEVICE) && !defined(FIXED_CONTROL_ENDPOINT_SIZE))
 207         if (USB_CurrentMode == USB_MODE_DEVICE)
 208         {
 209                 USB_Descriptor_Device_t* DeviceDescriptorPtr;
 210
 211                 if (USB_GetDescriptor((DTYPE_Device << 8), 0, (void*)&DeviceDescriptorPtr) != NO_DESCRIPTOR)
 212                 {
 213                         #if defined(USE_RAM_DESCRIPTORS)
 214                                 USB_ControlEndpointSize = DeviceDescriptorPtr->Endpoint0Size;
 215                         #elif defined(USE_EEPROM_DESCRIPTORS)
 216                                 USB_ControlEndpointSize = eeprom_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 217                         #else
 218                                 USB_ControlEndpointSize = pgm_read_byte(&DeviceDescriptorPtr->Endpoint0Size);
 219                         #endif
 220                 }
 221         }
 222         #endif
 223
 224         USB_Attach();
 225
 226         #if defined(USB_DEVICE_ONLY)
 227         USB_INT_Enable(USB_INT_SUSPEND);
 228         USB_INT_Enable(USB_INT_EORSTI);
 229         #elif defined(USB_HOST_ONLY)
 230         USB_Host_HostMode_On();
 231
 232         USB_Host_VBUS_Auto_Off();
 233         USB_OTGPAD_Off();
 234
 235         USB_Host_VBUS_Manual_Enable();
 236         USB_Host_VBUS_Manual_On();
 237
 238         USB_INT_Enable(USB_INT_SRPI);
 239         USB_INT_Enable(USB_INT_BCERRI);
 240         #else
 241         if (USB_CurrentMode == USB_MODE_DEVICE)
 242         {
 243                 USB_INT_Enable(USB_INT_SUSPEND);
 244                 USB_INT_Enable(USB_INT_EORSTI);
 245         }
 246         else if (USB_CurrentMode == USB_MODE_HOST)
 247         {
 248                 USB_Host_HostMode_On();
 249
 250                 USB_Host_VBUS_Auto_Off();
 251                 USB_OTGPAD_Off();
 252
 253                 USB_Host_VBUS_Manual_Enable();
 254                 USB_Host_VBUS_Manual_On();
 255
 256                 USB_INT_Enable(USB_INT_SRPI);
 257                 USB_INT_Enable(USB_INT_BCERRI);
 258         }
 259         #endif
 260 }