1 # Copyright (c) 2015 Stephen Warren
2 # Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
4 # SPDX-License-Identifier: GPL-2.0
6 # Logic to interact with U-Boot running on real hardware, typically via a
7 # physical serial port.
10 from u_boot_spawn import Spawn
11 from u_boot_console_base import ConsoleBase
13 class ConsoleExecAttach(ConsoleBase):
14 """Represents a physical connection to a U-Boot console, typically via a
15 serial port. This implementation executes a sub-process to attach to the
16 console, expecting that the stdin/out of the sub-process will be forwarded
17 to/from the physical hardware. This approach isolates the test infra-
18 structure from the user-/installation-specific details of how to
19 communicate with, and the identity of, serial ports etc."""
21 def __init__(self, log, config):
22 """Initialize a U-Boot console connection.
25 log: A multiplexed_log.Logfile instance.
26 config: A "configuration" object as defined in conftest.py.
32 # The max_fifo_fill value might need tweaking per-board/-SoC?
33 # 1 would be safe anywhere, but is very slow (a pexpect issue?).
34 # 16 is a common FIFO size.
35 # HW flow control would mean this could be infinite.
36 super(ConsoleExecAttach, self).__init__(log, config, max_fifo_fill=16)
38 self.log.action('Flashing U-Boot')
39 cmd = ['u-boot-test-flash', config.board_type, config.board_identity]
40 runner = self.log.get_runner(cmd[0], sys.stdout)
45 """Connect to a fresh U-Boot instance.
47 The target board is reset, so that U-Boot begins running from scratch.
53 A u_boot_spawn.Spawn object that is attached to U-Boot.
56 args = [self.config.board_type, self.config.board_identity]
57 s = Spawn(['u-boot-test-console'] + args)
59 self.log.action('Resetting board')
60 cmd = ['u-boot-test-reset'] + args
61 runner = self.log.get_runner(cmd[0], sys.stdout)