libupgrade/hmx_upgrade_flash.c

/* Copyright (C) 2011-2012 Humax Co., Ltd. All rights reserved.
 *
 * Humax Co., Ltd. ("Humax") hereby provides permission, free of charge, to any
 * person obtaining a copy of this source code, to use and redistribute this
 * source code with or without modification subject to the following conditions:
 *
 * 1. Redistributions of this source code must retain the above copyright
 * notice, permission notice, this list of conditions and the following
 * disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * permission notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY HUMAX "AS IS" WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ACCURACY, COMPLETENESS,
 * CURRENCY, AVAILABILITY, TITLE OR NON-INFRINGEMENT. IN NO EVENT HUMAX OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * The views and conclusion contained in the software and documentation are
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 *
 * Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Humax¿s software provided under a license
 * other than the above license, without Humax's express prior written consent.
 */
/*******************************************************************/
/************************* File Description ************************/
/*******************************************************************/
/* File Name:           $Workfile:   hmx_uprade_flash.c  $
 * Version:             $Revision:   1.0  $
 * Original Author:     Yang Hyun Uk $
 * Current Author:      $Author: huyang@humaxdigital.com $
 * Date:                $Date: 2011.09.30
 * File Description:    Humax Upgrade APIs
 * Module:
 * Remarks:
 */

/**
 * @defgroup UPGRADE_FLASH Flashing APIs for Upgrade Module
 * @ingroup UPGRADE
 *
 */

/**
 * @author Hyunuk Yang(huyang@humaxdigital.com)
 * @date 30 Sept 2011
 */

 /*@{*/

/**
 * @file hmx_upgrade_flash.c
 */

/*******************************************************************/
/**************************** Header Files *************************/
/*******************************************************************/
/* Start Including Header Files */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <mtd/mtd-user.h>
/* End Including Headers */


/*******************************************************************/
/****************************** define *****************************/
/*******************************************************************/
/* Start #define */
/* this is for test */
#define TARGET_NVRAM_MTD        "/dev/mtd/hnvram"
/* End #define */

/*******************************************************************/
/****************************** typedef ****************************/
/*******************************************************************/
/* Start typedef */
/* End typedef */


/*******************************************************************/
/************************ global variables *************************/
/*******************************************************************/
/* Start global variable */
int libupgrade_verbose = 1;
/* End global variable */


/*******************************************************************/
/************************ static variables *************************/
/*******************************************************************/
/* Start static variable */
int fd_nvram = -1;

static unsigned long    s_FlashTotalSize;
static unsigned long    s_FlashBlockSize;
static unsigned char *s_BlockBuff;
/* End static variable */

/*******************************************************************/
/************************ static funtions **************************/
/*******************************************************************/
int HMX_UPGRADE_NVRAM_Write(unsigned long offset, unsigned char * data,
                            unsigned int size )
{
  int ret;

  if (libupgrade_verbose) printf("[%s] offset %08x, size %d, data = %02x\n",
                                 __FUNCTION__, offset, size, data[0] );

  if ( fd_nvram < 0 ) {
    fd_nvram = open(TARGET_NVRAM_MTD, (O_RDWR | O_SYNC) );
    if( fd_nvram < 0 ) {
      perror(TARGET_NVRAM_MTD);
      return -1;
    }
  }

  ret = lseek(fd_nvram, offset, SEEK_SET);
  if(ret < 0) {
    perror("lseek");
    return -1;
  }

  ret = write(fd_nvram, data, size);
  if(ret < 0) {
    perror("write");
    return -1;
  }

  /* Writes to /dev/mtdblockX are cached indefinitely until the last file
   * descriptor is closed. Flush this cache after writing. The user depends on
   * data being physically written to flash when this function returns.
   * Requires CAP_SYS_ADMIN. */
  ret = ioctl(fd_nvram, BLKFLSBUF, 0);
  if(ret < 0) {
    perror("ioctl(hnvram, BLKFLSBUF, 0)");
    return -1;
  }

  return 0;
}

int HMX_UPGRADE_NVRAM_Read(unsigned long offset, unsigned char * data,
                           unsigned int size )
{
  int ret;
  unsigned long block_size, write_size;
  unsigned long mov_offset, remain_size;

  if (libupgrade_verbose) printf("[%s] offset %08x, size %d, data = %02x\n",
                                 __FUNCTION__, offset, size, data[0] );

  /* */
  if ( fd_nvram < 0 ) {
    fd_nvram = open(TARGET_NVRAM_MTD, (O_RDWR | O_SYNC) );
    if( fd_nvram < 0 ) {
      perror(TARGET_NVRAM_MTD);
      return -1;
    }
  }


  ret = lseek(fd_nvram, offset, SEEK_SET);
  if(ret < 0) {
    perror("lseek");
    return -1;
  }

  ret = read(fd_nvram, data, size);
  if(ret < 0) {
    perror("read");
    return ret;
  }

  return 0;
}


/*@}*/