1 files changed, 65 insertions, 0 deletions
diff --git a/test/py/u_boot_console_exec_attach.py b/test/py/u_boot_console_exec_attach.py
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+++ b/test/py/u_boot_console_exec_attach.py
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+# Copyright (c) 2015 Stephen Warren
+# Copyright (c) 2015-2016, NVIDIA CORPORATION. All rights reserved.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+# Logic to interact with U-Boot running on real hardware, typically via a
+# physical serial port.
+
+import sys
+from u_boot_spawn import Spawn
+from u_boot_console_base import ConsoleBase
+
+class ConsoleExecAttach(ConsoleBase):
+    '''Represents a physical connection to a U-Boot console, typically via a
+    serial port. This implementation executes a sub-process to attach to the
+    console, expecting that the stdin/out of the sub-process will be forwarded
+    to/from the physical hardware. This approach isolates the test infra-
+    structure from the user-/installation-specific details of how to
+    communicate with, and the identity of, serial ports etc.'''
+
+    def __init__(self, log, config):
+        '''Initialize a U-Boot console connection.
+
+        Args:
+            log: A multiplexed_log.Logfile instance.
+            config: A "configuration" object as defined in conftest.py.
+
+        Returns:
+            Nothing.
+        '''
+
+        # The max_fifo_fill value might need tweaking per-board/-SoC?
+        # 1 would be safe anywhere, but is very slow (a pexpect issue?).
+        # 16 is a common FIFO size.
+        # HW flow control would mean this could be infinite.
+        super(ConsoleExecAttach, self).__init__(log, config, max_fifo_fill=16)
+
+        self.log.action('Flashing U-Boot')
+        cmd = ['u-boot-test-flash', config.board_type, config.board_identity]
+        runner = self.log.get_runner(cmd[0], sys.stdout)
+        runner.run(cmd)
+        runner.close()
+
+    def get_spawn(self):
+        '''Connect to a fresh U-Boot instance.
+
+        The target board is reset, so that U-Boot begins running from scratch.
+
+        Args:
+            None.
+
+        Returns:
+            A u_boot_spawn.Spawn object that is attached to U-Boot.
+        '''
+
+        args = [self.config.board_type, self.config.board_identity]
+        s = Spawn(['u-boot-test-console'] + args)
+
+        self.log.action('Resetting board')
+        cmd = ['u-boot-test-reset'] + args
+        runner = self.log.get_runner(cmd[0], sys.stdout)
+        runner.run(cmd)
+        runner.close()
+
+        return s