Subversion Repositories openrisc_2011-10-31

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

//

//      wallclock_mpc5xx.cxx

//

//      mpc5xx RTC module driver.

//

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

//####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

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// for more details.

//

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

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// 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

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):     Bob Koninckx

// Contributors:  Bob Koninckx

// Date:          2002-01-18

// Purpose:       Wallclock driver for mpc5xx

//

//####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/hal/hal_arch.h>             // RTC register definitions

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

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

// 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 now;

  HAL_READ_UINT32(CYGARC_REG_IMM_RTC, now);

  return now;

}

#ifndef CYGSEM_WALLCLOCK_SET_GET_MODE

void

Cyg_WallClock::init_hw_seconds(void)

{

  cyg_uint32 key = 0x55ccaa33;

  cyg_uint16 rtcsc;

  // Write zero to the time register

  // and start up the RTC

  HAL_WRITE_UINT32(CYGARC_REG_IMM_RTCK, key);

  HAL_WRITE_UINT32(CYGARC_REG_IMM_RTCSCK, key);

  key = 0;

  HAL_WRITE_UINT32(CYGARC_REG_IMM_RTC, key);

  HAL_READ_UINT16(CYGARC_REG_IMM_RTCSC, rtcsc);

  rtcsc |= 0x0001;

  HAL_WRITE_UINT16(CYGARC_REG_IMM_RTCSC, rtcsc);

}

#endif // CYGSEM_WALLCLOCK_SET_GET_MODE

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

// End of wallclock_mpc5xx.cxx