[root@yl2-a1v4rj95pppi smbus-tool]# ./build/whiteriver_exp  -i 10.57.216.109 -e 4 -c fw-down -p /home/zw/wr_exp@1.0.15.img
WhiteRiverEXP tool
username: root, password: 0penBmc
===============================================

CMD: fw-down,/home/zw/wr_exp@1.0.15.img
url: https://10.57.216.109/redfish/v1/EXPservice/EXPReadReg
exp_get_register, Payload: {"ExpanderId":4,"CmdId":241,"ReadLen":1}
exp_get_register, Response: {
  "Data": {
    "CmdId": 241,
    "DataLen": 1,
    "ExpanderId": 4,
    "Value": "fb"
  },
  "Status": "OK"
}
Write:10EF000000000000
url: https://10.57.216.109/redfish/v1/EXPservice/EXPWriteReg
exp_set_register, Payload: {"ExpanderId":4,"CmdId":240,"WriteLen":8,"Value":"10EF000000000000"}
exp_set_register, Response: {
  "Data": {
    "CmdId": 240,
    "DataLen": 8,
    "ExpanderId": 4
  },
  "Status": "OK"
}
url: https://10.57.216.109/redfish/v1/EXPservice/EXPReadReg
exp_get_register, Payload: {"ExpanderId":4,"CmdId":241,"ReadLen":1}
exp_get_register, Response: {
  "Data": {
    "CmdId": 241,
    "DataLen": 1,
    "ExpanderId": 4,
    "Value": "fb"
  },
  "Status": "OK"
}
AsyncPoll(5000)::456 = -5
m_exp->WriteFirmware(param)::444 = -5
CMD: fw-down,/home/zw/wr_exp@1.0.15.img return -5