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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 Red Hat, 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.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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.

//

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

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

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-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 */