lib/firmware/ap_firmware_config/grunt.py

# -*- coding: utf-8 -*-
# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Grunt configs."""

from __future__ import print_function


def is_fast_required(use_futility, servo):
  """Returns true if --fast is necessary to flash successfully.

  The configurations in this function consistently fail on the verify step,
  adding --fast removes verification of the flash and allows these configs to
  flash properly. Meant to be a temporary hack until b/143240576 is fixed.

  Args:
    use_futility (bool): True if futility is to be used, False if
      flashrom.
    servo (servo_lib.Servo): The type name of the servo device being used.

  Returns:
    bool: True if fast is necessary, False otherwise.
  """
  return use_futility and servo.is_v4


def get_commands(servo):
  """Get specific flash commands for grunt

  Each board needs specific commands including the voltage for Vref, to turn
  on and turn off the SPI flash. The get_*_commands() functions provide a
  board-specific set of commands for these tasks. The voltage for this board
  needs to be set to 1.8 V.

  Args:
    servo (servo_lib.Servo): The servo connected to the target DUT.

  Returns:
    list: [dut_control_on, dut_control_off, flashrom_cmd, futility_cmd]
      dut_control*=2d arrays formmated like [["cmd1", "arg1", "arg2"],
                                             ["cmd2", "arg3", "arg4"]]
                     where cmd1 will be run before cmd2
      flashrom_cmd=command to flash via flashrom
      futility_cmd=command to flash via futility
  """
  dut_control_on = []
  dut_control_off = []
  if servo.is_v2:
    dut_control_on.append([
        'spi2_vref:pp1800',
        'spi2_buf_en:on',
        'spi2_buf_on_flex_en:on',
        'cold_reset:on',
    ])
    dut_control_off.append([
        'spi2_vref:off',
        'spi2_buf_en:off',
        'spi2_buf_on_flex_en:off',
        'cold_reset:off',
    ])
    programmer = 'ft2232_spi:type=google-servo-v2,serial=%s' % servo.serial
  elif servo.is_micro:
    dut_control_on.append(['spi2_vref:pp1800', 'spi2_buf_en:on'])
    dut_control_off.append(['spi2_vref:off', 'spi2_buf_en:off'])
    programmer = 'raiden_debug_spi:serial=%s' % servo.serial
  elif servo.is_ccd:
    # Note nothing listed for flashing with ccd_cr50 on go/grunt-care.
    # These commands were based off the commands for other boards.
    programmer = 'raiden_debug_spi:target=AP,serial=%s' % servo.serial
  else:
    raise Exception('%s not supported' % servo.version)

  flashrom_cmd = ['flashrom', '-p', programmer, '-w']
  futility_cmd = ['futility', 'update', '-p', programmer, '-i']

  return [dut_control_on, dut_control_off, flashrom_cmd, futility_cmd]