usb_specific_request.c

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/* Copyright (c) 2007, Atmel Corporation All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
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 * from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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//_____ I N C L U D E S ____________________________________________________

#include "config.h"
#include "conf_usb.h"
#include "lib_mcu/usb/usb_drv.h"
#include "usb_descriptors.h"
#include "modules/usb/device_chap9/usb_standard_request.h"
#include "usb_specific_request.h"
#include "modules/control_access/ctrl_access.h"
#if ((USB_DEVICE_SN_USE==ENABLE) && (USE_DEVICE_SN_UNIQUE==ENABLE))
#include "lib_mcu/flash/flash_drv.h"
#endif

//_____ D E F I N I T I O N ________________________________________________

bit  ms_multiple_drive;

#ifdef __GNUC__
extern PGM_VOID_P pbuffer;
#else
extern U8   code *pbuffer;
#endif
extern U8   data_to_transfer;


//_____ D E C L A R A T I O N ______________________________________________

Bool usb_user_read_request(U8 type, U8 request)
{
   U16   wInterface;
   U8    wValue_msb;
   U8    wValue_lsb;

   // Read wValue
   wValue_lsb = Usb_read_byte();
   wValue_msb = Usb_read_byte();

   //** Specific request from Class MassStorage
   if( USB_SETUP_SET_CLASS_INTER == type )
   {
      switch( request )
      {
         case SETUP_MASS_STORAGE_RESET:
         // wValue must be 0
         // wIndex = Interface
         if( (0!=wValue_lsb) || (0!=wValue_msb) )
            break;
         LSB(wInterface)=Usb_read_byte();
         MSB(wInterface)=Usb_read_byte();
         if( INTERFACE_NB != wInterface )
            break;
         Usb_ack_receive_setup();
         Usb_send_control_in();
         return TRUE;
         break;
      }
   }
   if( USB_SETUP_GET_CLASS_INTER == type )
   {
      switch( request )
      {
         case SETUP_MASS_STORAGE_GET_MAX_LUN:
         // wValue must be 0
         // wIndex = Interface
         if( (0!=wValue_lsb) || (0!=wValue_msb) )
            break;
         LSB(wInterface)=Usb_read_byte();
         MSB(wInterface)=Usb_read_byte();
         if( INTERFACE_NB != wInterface )
            break;
         Usb_ack_receive_setup();
         Usb_write_byte( (get_nb_lun()-1) );
         Usb_send_control_in();
         ms_multiple_drive = 1;
         return TRUE;
         break;
      }
   }
   
   return FALSE;  // No supported request
}


void usb_user_endpoint_init(U8 conf_nb)
{
   usb_configure_endpoint(EP_MS_IN,      \
                          TYPE_BULK,     \
                          DIRECTION_IN,  \
                          SIZE_64,       \
                          TWO_BANKS,     \
                          NYET_ENABLED);
   usb_configure_endpoint(EP_MS_OUT,     \
                          TYPE_BULK,     \
                          DIRECTION_OUT, \
                          SIZE_64,       \
                          TWO_BANKS,     \
                          NYET_ENABLED);
}


U8   usb_user_interface_get( U16 wInterface )
{
   return 0;  // Only one alternate setting possible for all interface
}


void usb_user_interface_reset(U16 wInterface, U8 alternate_setting)
{  
   // default setting selected = reset data toggle
   if( INTERFACE_NB == wInterface )
   {
      // Interface Mass Storage
      Usb_select_endpoint(EP_MS_IN);
      Usb_disable_stall_handshake();
      Usb_reset_endpoint(EP_MS_IN);
      Usb_reset_data_toggle();
      Usb_select_endpoint(EP_MS_OUT);
      Usb_disable_stall_handshake();
      Usb_reset_endpoint(EP_MS_OUT);
      Usb_reset_data_toggle();
   }
}

   
Bool usb_user_get_descriptor(U8 type, U8 string)
{
   switch(type)
   {
      case DESCRIPTOR_STRING:
      switch (string)
      {
         case LANG_ID:
         data_to_transfer = sizeof (usb_user_language_id);
         pbuffer = &(usb_user_language_id.bLength);
         return TRUE;
         break;
        
         case MAN_INDEX:
         data_to_transfer = sizeof (usb_user_manufacturer_string_descriptor);
         pbuffer = &(usb_user_manufacturer_string_descriptor.bLength);
         return TRUE;
         break;
        
         case PROD_INDEX:
         data_to_transfer = sizeof (usb_user_product_string_descriptor);
         pbuffer = &(usb_user_product_string_descriptor.bLength);
         return TRUE;
         break;
           
#if (USB_DEVICE_SN_USE==ENABLE)              
         case SN_INDEX:
         data_to_transfer = sizeof (usb_user_serial_number);
         pbuffer = &(usb_user_serial_number.bLength);
#if (USE_DEVICE_SN_UNIQUE==ENABLE)
         f_get_serial_string=TRUE;
         data_to_transfer += (SN_LENGTH*4);
#endif
         return TRUE;
         break;
#endif
      }
      break;
   }
   return FALSE;
}

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