Subversion Repositories openrisc_2011-10-31

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

//

//      sh_hs7729pci_flash.c

//

//      Flash programming for Fujitsu/AMD device on SH HS7729PCI board

//

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

//####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:         2001-05-28

// Purpose:      

// Description:  

//              

//####DESCRIPTIONEND####

//

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

#include <cyg/infra/cyg_type.h>

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

// Device properties

#define CYGNUM_FLASH_INTERLEAVE (2)

#define CYGNUM_FLASH_SERIES     (1)

#define CYGNUM_FLASH_WIDTH      (16)

#define CYGNUM_FLASH_BASE       (plf_flash_base)

static cyg_uint32 plf_flash_base;

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

// Platform specific extras

static void plf_flash_init(void);

#define CYGHWR_FLASH_AM29XXXXX_PLF_INIT() plf_flash_init()

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

// Now include the driver code.

#include "cyg/io/flash_am29xxxxx.inl"

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

// Magic to determine location of flash

// This works by querying at the location where we expect the EPROM to

// be. Then the returned data is compared with the data at that location.

// If there's a match, assume that to be the location of the EPROM.

// Otherwise it's at the other location.

//

// This is done to avoid having separate configurations for the two board

// configurations. This is simple, has negligible overhead, and Just Works.

void

plf_flash_init(void)

{

    flash_data_t id[2];

    flash_data_t* p;

    plf_flash_base = 0xa0400000;

    flash_dev_query(id);

    p = (flash_data_t*)0xa0400000;

    if (id[0] == *p++ && id[1] == *p)

        plf_flash_base = 0xa0000000;

    // Make that the cached region.

    plf_flash_base &= ~0x20000000;

}

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

// EOF sh_hs7729pci_flash.c