| Stephen Warren | 10e5063 | 2016-01-15 11:15:24 -0700 | [diff] [blame] | 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 | 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) |
| 41 | runner.run(cmd) |
| 42 | runner.close() |
| 43 | |
| 44 | def get_spawn(self): |
| 45 | '''Connect to a fresh U-Boot instance. |
| 46 | |
| 47 | The target board is reset, so that U-Boot begins running from scratch. |
| 48 | |
| 49 | Args: |
| 50 | None. |
| 51 | |
| 52 | Returns: |
| 53 | A u_boot_spawn.Spawn object that is attached to U-Boot. |
| 54 | ''' |
| 55 | |
| 56 | args = [self.config.board_type, self.config.board_identity] |
| 57 | s = Spawn(['u-boot-test-console'] + args) |
| 58 | |
| 59 | self.log.action('Resetting board') |
| 60 | cmd = ['u-boot-test-reset'] + args |
| 61 | runner = self.log.get_runner(cmd[0], sys.stdout) |
| 62 | runner.run(cmd) |
| 63 | runner.close() |
| 64 | |
| 65 | return s |