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

//

//      synth.c

//

//      Flash programming

//

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

//####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):    andrew.lunn@ascom.ch

// Contributors: jlarmour

// Date:         2001-10-30

// Purpose:      

// Description:  

//              

//####DESCRIPTIONEND####

//

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

#include <pkgconf/devs_flash_synth.h>

#include <cyg/hal/hal_io.h>

#include <cyg/infra/cyg_ass.h>

#include <errno.h>

#include <string.h>

#define  _FLASH_PRIVATE_

#include <cyg/io/flash.h>

#include "synth.h"

/* Holds the fd for the flash file */

int cyg_dev_flash_synth_flashfd;

/* Holds the base address of the mmap'd region */

flash_t *cyg_dev_flash_synth_base;

/* Helper function. The Linux system call cannot pass 6 parameters. Instead

   a structure is filled in and passed as one parameter */

static int

cyg_hal_sys_do_mmap(void *addr, unsigned long length, unsigned long prot,

                    unsigned long flags, unsigned long fd, unsigned long off)

{

    struct cyg_hal_sys_mmap_args args;

    args.addr = (unsigned long) addr;

    args.len = length;

    args.prot = prot = prot;

    args.flags = flags;

    args.fd = fd;

    args.offset = off;

    return (cyg_hal_sys_mmap(&args));

}

int

flash_hwr_init(void)

{

    flash_info.block_size = CYGNUM_FLASH_SYNTH_BLOCKSIZE;

    flash_info.buffer_size = 0;

    flash_info.blocks = CYGNUM_FLASH_SYNTH_NUMBLOCKS;

    cyg_dev_flash_synth_flashfd = cyg_hal_sys_open(CYGDAT_FLASH_SYNTH_FILENAME,

                CYG_HAL_SYS_O_RDWR,

                CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);

    if (cyg_dev_flash_synth_flashfd == -ENOENT) {

        long w, bytesleft;

        char buf[128];

        cyg_dev_flash_synth_flashfd = cyg_hal_sys_open(

                CYGDAT_FLASH_SYNTH_FILENAME,

                CYG_HAL_SYS_O_RDWR|CYG_HAL_SYS_O_CREAT,

                CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);

        CYG_ASSERT( cyg_dev_flash_synth_flashfd >= 0,

                    "Opening of the file for the synth flash failed!");

        // fill with 0xff

        memset( buf, 0xff, sizeof(buf) );

        bytesleft = CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS;

        while (bytesleft > 0)

        {

            int bytesneeded;

            bytesneeded = bytesleft < sizeof(buf) ?  bytesleft : sizeof(buf);

            w = cyg_hal_sys_write( cyg_dev_flash_synth_flashfd, buf,

                                   bytesneeded );

            CYG_ASSERT(w == bytesneeded, "initialization of flash file failed");

            bytesleft -= bytesneeded;

        } // while

    }

    CYG_ASSERT( cyg_dev_flash_synth_flashfd >= 0,

                "Opening of the file for the synth flash failed!");

    if ( cyg_dev_flash_synth_flashfd <= 0 ) {

        return FLASH_ERR_HWR;

    }

    cyg_dev_flash_synth_base = (flash_t *)cyg_hal_sys_do_mmap(

#ifdef CYGMEM_FLASH_SYNTH_BASE

                CYGMEM_FLASH_SYNTH_BASE,

#else

                NULL,

#endif

                (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS),

                CYG_HAL_SYS_PROT_READ,

#ifdef CYGSEM_FLASH_SYNTH_FILE_WRITEBACK

                CYG_HAL_SYS_MAP_SHARED

#else

                CYG_HAL_SYS_MAP_PRIVATE

#endif

#ifdef CYGMEM_FLASH_SYNTH_BASE

                |CYG_HAL_SYS_MAP_FIXED

#endif

                , cyg_dev_flash_synth_flashfd, 0 );

    CYG_ASSERT( cyg_dev_flash_synth_base > 0, "mmap of flash file failed!" );

    if (cyg_dev_flash_synth_base <= 0) {

        return FLASH_ERR_HWR;

    }

    flash_info.start = cyg_dev_flash_synth_base;

    flash_info.end = (void *)(((char *)cyg_dev_flash_synth_base) +

        (CYGNUM_FLASH_SYNTH_BLOCKSIZE * CYGNUM_FLASH_SYNTH_NUMBLOCKS));

    return FLASH_ERR_OK;

}

// Map a hardware status to a package error

int

flash_hwr_map_error(int err)

{

    return err;

}

// See if a range of FLASH addresses overlaps currently running code

bool

flash_code_overlaps(void *start, void *end)

{

    extern char _stext[], _etext[];

    return ((((unsigned long)&_stext >= (unsigned long)start) &&

             ((unsigned long)&_stext < (unsigned long)end)) ||

            (((unsigned long)&_etext >= (unsigned long)start) &&

             ((unsigned long)&_etext < (unsigned long)end)));

}

// EOF synth.c