LUFA/Drivers/USB/Class/Host/MassStorage.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 "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_HOST)
  33
  34 #define INCLUDE_FROM_MS_CLASS_HOST_C
  35 #include "MassStorage.h"
  36
  37 #warning The Mass Storage Host mode Class driver is currently incomplete and is for preview purposes only.
  38
  39 uint8_t MS_Host_ConfigurePipes(USB_ClassInfo_MS_Host_t* MSInterfaceInfo, uint16_t ConfigDescriptorLength,
  40                                                            uint8_t* DeviceConfigDescriptor)
  41 {
  42         uint8_t FoundEndpoints = 0;
  43
  44         memset(&MSInterfaceInfo->State, 0x00, sizeof(MSInterfaceInfo->State));
  45
  46         if (DESCRIPTOR_TYPE(DeviceConfigDescriptor) != DTYPE_Configuration)
  47           return MS_ENUMERROR_InvalidConfigDescriptor;
  48
  49         if (USB_GetNextDescriptorComp(&ConfigDescriptorLength, &DeviceConfigDescriptor,
  50                                       DComp_NextMassStorageInterface) != DESCRIPTOR_SEARCH_COMP_Found)
  51         {
  52                 return MS_ENUMERROR_NoMSInterfaceFound;
  53         }
  54
  55         MSInterfaceInfo->State.InterfaceNumber       =
  56         #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES)
  57                              DESCRIPTOR_PCAST(DeviceConfigDescriptor, USB_Descriptor_Interface_t)->InterfaceNumber;
  58         #else
  59                              DESCRIPTOR_PCAST(DeviceConfigDescriptor, USB_Descriptor_Interface_t)->bInterfaceNumber;
  60         #endif
  61
  62         while (FoundEndpoints != (MS_FOUND_DATAPIPE_IN | MS_FOUND_DATAPIPE_OUT))
  63         {
  64                 if (USB_GetNextDescriptorComp(&ConfigDescriptorLength, &DeviceConfigDescriptor,
  65                                               DComp_NextInterfaceBulkDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
  66                 {
  67                         return MS_ENUMERROR_EndpointsNotFound;
  68                 }
  69
  70                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(DeviceConfigDescriptor, USB_Descriptor_Endpoint_t);
  71
  72                 if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
  73                 {
  74                         Pipe_ConfigurePipe(MSInterfaceInfo->Config.DataINPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_IN,
  75                                            EndpointData->EndpointAddress, EndpointData->EndpointSize,
  76                                            PIPE_BANK_DOUBLE);
  77                         MSInterfaceInfo->State.DataINPipeSize = EndpointData->EndpointSize;
  78
  79                         FoundEndpoints |= MS_FOUND_DATAPIPE_IN;
  80                 }
  81                 else
  82                 {
  83                         Pipe_ConfigurePipe(MSInterfaceInfo->Config.DataOUTPipeNumber, EP_TYPE_BULK, PIPE_TOKEN_OUT,
  84                                            EndpointData->EndpointAddress, EndpointData->EndpointSize,
  85                                            PIPE_BANK_DOUBLE);
  86                         MSInterfaceInfo->State.DataOUTPipeSize = EndpointData->EndpointSize;
  87
  88                         FoundEndpoints |= MS_FOUND_DATAPIPE_OUT;
  89                 }
  90         }
  91
  92         MSInterfaceInfo->State.Active = true;
  93         return MS_ENUMERROR_NoError;
  94 }
  95
  96 static uint8_t DComp_NextMassStorageInterface(void* CurrentDescriptor)
  97 {
  98         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
  99         {
 100                 if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class    == MASS_STORE_CLASS)    &&
 101                     (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == MASS_STORE_SUBCLASS) &&
 102                     (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == MASS_STORE_PROTOCOL))
 103                 {
 104                         return DESCRIPTOR_SEARCH_Found;
 105                 }
 106         }
 107
 108         return DESCRIPTOR_SEARCH_NotFound;
 109 }
 110
 111 static uint8_t DComp_NextInterfaceBulkDataEndpoint(void* CurrentDescriptor)
 112 {
 113         if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
 114         {
 115                 uint8_t EndpointType = (DESCRIPTOR_CAST(CurrentDescriptor,
 116                                                         USB_Descriptor_Endpoint_t).Attributes & EP_TYPE_MASK);
 117
 118                 if (EndpointType == EP_TYPE_BULK)
 119                   return DESCRIPTOR_SEARCH_Found;
 120         }
 121         else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
 122         {
 123                 return DESCRIPTOR_SEARCH_Fail;
 124         }
 125
 126         return DESCRIPTOR_SEARCH_NotFound;
 127 }
 128
 129 void MS_Host_USBTask(USB_ClassInfo_MS_Host_t* MSInterfaceInfo)
 130 {
 131
 132 }
 133
 134 #endif