Subversion Repositories openrisc

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

//

//      devs/wallclock/mips/ref4955/ref4955.cxx

//

//      Wallclock implementation

//

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

//####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):     jskov

// Contributors:  jskov

// Date:          2000-05-25

// Purpose:       Wallclock driver for REF4955

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/wallclock.h>          // Wallclock device config

#include <cyg/hal/hal_io.h>             // IO macros

#include <cyg/infra/cyg_type.h>         // Common type definitions and support

#include <cyg/io/wallclock.hxx>         // The WallClock API

#include <cyg/io/wallclock/wallclock.inl> // Helpers

#include <cyg/infra/diag.h>             // For debugging

// REF4955 has a Dallas 1742W part.

#define DS_BASE 0xb5000000

#include <cyg/io/wallclock/ds1742.inl>

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

// Functions required for the hardware-driver API.

// Returns the number of seconds elapsed since 1970-01-01 00:00:00.

cyg_uint32

Cyg_WallClock::get_hw_seconds(void)

{

    cyg_uint32 year, month, mday, hour, minute, second;

    get_ds_hwclock(&year, &month, &mday, &hour, &minute, &second);

#if 0

    // This will cause the test to eventually fail due to these printouts

    // causing timer interrupts to be lost...

    diag_printf("year %02d\n", year);

    diag_printf("month %02d\n", month);

    diag_printf("mday %02d\n", mday);

    diag_printf("hour %02d\n", hour);

    diag_printf("minute %02d\n", minute);

    diag_printf("second %02d\n", second);

#endif

    cyg_uint32 now = _simple_mktime(year, month, mday, hour, minute, second);

    return now;

}

#ifdef CYGSEM_WALLCLOCK_SET_GET_MODE

// Sets the clock. Argument is seconds elapsed since 1970-01-01 00:00:00.

void

Cyg_WallClock::set_hw_seconds( cyg_uint32 secs )

{

    cyg_uint32 year, month, mday, hour, minute, second;

    _simple_mkdate(secs, &year, &month, &mday, &hour, &minute, &second);

    set_ds_hwclock(year, month, mday, hour, minute, second);

}

#endif

void

Cyg_WallClock::init_hw_seconds(void)

{

#ifdef CYGSEM_WALLCLOCK_SET_GET_MODE

    init_ds_hwclock();

#else

    // This is our base: 1970-01-01 00:00:00

    // Set the HW clock - if for nothing else, just to be sure it's in a

    // legal range. Any arbitrary base could be used.

    // After this the hardware clock is only read.

    set_ds_hwclock(1970,1,1,0,0,0);

#endif

}

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

// End of devs/wallclock/mips/ref4955/wallclock_ref4955.cxx