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#ifndef CYGONCE_IO_H

#define CYGONCE_IO_H

// ====================================================================

//

//      io.h

//

//      Device I/O 

//

// ====================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under    

// the terms of the GNU General Public License as published by the Free     

// Software Foundation; either version 2 or (at your option) any later      

// version.                                                                 

//

// eCos is distributed in the hope that it will be useful, but WITHOUT      

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    

// for more details.                                                        

//

// You should have received a copy of the GNU General Public License        

// along with eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

// ====================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   gthomas

// Contributors:        gthomas

// Date:        1999-02-04

// Purpose:     Describe low level I/O interfaces.

// Description:

//

//####DESCRIPTIONEND####

//

// ====================================================================

// This file contains the user-level visible I/O interfaces

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>

#ifdef CYGPKG_ERROR

#include <cyg/error/codes.h>

#else

#error I/O subsystem requires 'error' package

#endif

// typedef int Cyg_ErrNo;

#ifdef __cplusplus

extern "C" {

#endif

typedef void *cyg_io_handle_t;

// Lookup a device and return it's handle

Cyg_ErrNo cyg_io_lookup(const char *name,

                        cyg_io_handle_t *handle);

// Write data to a device

Cyg_ErrNo cyg_io_write(cyg_io_handle_t handle,

                       const void *buf,

                       cyg_uint32 *len);

// Read data from a device

Cyg_ErrNo cyg_io_read(cyg_io_handle_t handle,

                      void *buf,

                      cyg_uint32 *len);

// Write data to a block device

Cyg_ErrNo cyg_io_bwrite(cyg_io_handle_t handle,

                       const void *buf,

                       cyg_uint32 *len,

                       cyg_uint32 pos);

// Read data from a block device

Cyg_ErrNo cyg_io_bread(cyg_io_handle_t handle,

                      void *buf,

                      cyg_uint32 *len,

                      cyg_uint32 pos);

// Get the configuration of a device

Cyg_ErrNo cyg_io_get_config(cyg_io_handle_t handle,

                            cyg_uint32 key,

                            void *buf,

                            cyg_uint32 *len);

// Change the configuration of a device

Cyg_ErrNo cyg_io_set_config(cyg_io_handle_t handle,

                            cyg_uint32 key,

                            const void *buf,

                            cyg_uint32 *len);

// Test a device for readiness    

cyg_bool cyg_io_select(cyg_io_handle_t handle,

                       cyg_uint32 which,

                       CYG_ADDRWORD info);

#ifdef __cplusplus

}

#endif

#endif  /* CYGONCE_IO_H */

/* EOF io.h */