#!/usr/local/bin/python
#CHIPSEC: Platform Security Assessment Framework
#Copyright (c) 2010-2014, Intel Corporation
# 
#This program 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; Version 2.
#
#This program 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 this program; if not, write to the Free Software
#Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
#Contact information:
#chipsec@intel.com
#




#
# usage as a standalone utility:
#
## \addtogroup standalone
#
#
#chipsec_util cmos
#------------------------
#~~~
#chipsec_util smbus read \<device_addr\> \<start_offset\> [size]
#chipsec_util smbus write \<device_addr\> \<offset\> \<byte_val\>
# ''
#    Examples:
#        chipsec_util smbus read  0xA0 0x0 0x100
# ~~~
#
#
__version__ = '1.0'

import os
import sys
import time

import chipsec_util
#from chipsec_util import global_usage, chipsec_util_commands, _cs
from chipsec_util import chipsec_util_commands, _cs

from chipsec.logger     import *
from chipsec.file       import *

from chipsec.hal.smbus   import *
#from chipsec.chipset    import cs
#_cs = cs()

usage = "chipsec_util smbus read <device_addr> <start_offset> [size]\n" + \
        "chipsec_util smbus write <device_addr> <offset> <byte_val>\n" + \
        "Examples:\n" + \
        "  chipsec_util smbus read  0xA0 0x0 0x100\n\n"

chipsec_util.global_usage += usage


def smbus(argv):
    if 3 > len(argv):
      print usage
      return

    try:
       smbus = SMBus( _cs )
    except BaseException, msg:
       print msg
       return

    op = argv[2]
    t = time.time()

    if not smbus.is_SMBus_supported():
        logger().log( "[CHIPSEC] SMBus controller is not supported" )
        return

    smbus.display_SMBus_info()

    if ( 'read' == op ):
       dev_addr  = int(argv[3],16)
       start_off = int(argv[4],16)
       if len(argv) > 5:
           size   = int(argv[5],16)
           buf = smbus.read_range( dev_addr, start_off, size )
           logger().log( "[CHIPSEC] SMBus read: device 0x%X offset 0x%X size 0x%X" % (dev_addr, start_off, size) )
           print_buffer( buf )
       else:
           val = smbus.read_byte( dev_addr, start_off )
           logger().log( "[CHIPSEC] SMBus read: device 0x%X offset 0x%X = 0x%X" % (dev_addr, start_off, val) )
    elif ( 'write' == op ):
       dev_addr = int(argv[3],16)
       off      = int(argv[4],16)
       val      = int(argv[5],16)
       logger().log( "[CHIPSEC] SMBus write: device 0x%X offset 0x%X = 0x%X" % (dev_addr, off, val) )
       smbus.write_byte( dev_addr, off, val )
    else:
       logger().error( "unknown command-line option '%.32s'" % op )
       print usage
       return

    logger().log( "[CHIPSEC] (smbus) time elapsed %.3f" % (time.time()-t) )


chipsec_util_commands['smbus'] = {'func' : smbus,    'start_driver' : True  }


.