]> git.sur5r.net Git - u-boot/blob - test/py/u_boot_console_exec_attach.py
445b58dda6121f85eb7bc3bb3fbdc6408e8a1fb2
[u-boot] / test / py / u_boot_console_exec_attach.py
1 # Copyright (c) 2015 Stephen Warren
2 # Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
3 #
4 # SPDX-License-Identifier: GPL-2.0
5
6 # Logic to interact with U-Boot running on real hardware, typically via a
7 # physical serial port.
8
9 import sys
10 from u_boot_spawn import Spawn
11 from u_boot_console_base import ConsoleBase
12
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."""
20
21     def __init__(self, log, config):
22         """Initialize a U-Boot console connection.
23
24         Args:
25             log: A multiplexed_log.Logfile instance.
26             config: A "configuration" object as defined in conftest.py.
27
28         Returns:
29             Nothing.
30         """
31
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)
37
38         with self.log.section('flash'):
39             self.log.action('Flashing U-Boot')
40             cmd = ['u-boot-test-flash', config.board_type, config.board_identity]
41             runner = self.log.get_runner(cmd[0], sys.stdout)
42             runner.run(cmd)
43             runner.close()
44             self.log.status_pass('OK')
45
46     def get_spawn(self):
47         """Connect to a fresh U-Boot instance.
48
49         The target board is reset, so that U-Boot begins running from scratch.
50
51         Args:
52             None.
53
54         Returns:
55             A u_boot_spawn.Spawn object that is attached to U-Boot.
56         """
57
58         args = [self.config.board_type, self.config.board_identity]
59         s = Spawn(['u-boot-test-console'] + args)
60
61         try:
62             self.log.action('Resetting board')
63             cmd = ['u-boot-test-reset'] + args
64             runner = self.log.get_runner(cmd[0], sys.stdout)
65             runner.run(cmd)
66             runner.close()
67         except:
68             s.close()
69             raise
70
71         return s