1 # Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3 # SPDX-License-Identifier: GPL-2.0
5 # Test U-Boot's "dfu" command. The test starts DFU in U-Boot, waits for USB
6 # device enumeration on the host, executes dfu-util multiple times to test
7 # various transfer sizes, many of which trigger USB driver edge cases, and
8 # finally aborts the "dfu" command in U-Boot.
16 Note: This test relies on:
18 a) boardenv_* to contain configuration values to define which USB ports are
19 available for testing. Without this, this test will be automatically skipped.
22 env__usb_dev_ports = (
24 "fixture_id": "micro_b",
26 "host_usb_dev_node": "/dev/usbdev-p2371-2180",
27 # This parameter is optional /if/ you only have a single board
28 # attached to your host at a time.
29 "host_usb_port_path": "3-13",
37 "alt_info": "/dfu_test.bin ext4 0 1;/dfu_dummy.bin ext4 0 1",
38 "cmd_params": "mmc 0",
39 # This value is optional.
40 # If present, it specified the set of transfer sizes tested.
41 # If missing, a default list of sizes will be used, which covers
42 # various useful corner cases.
43 # Manually specifying test sizes is useful if you wish to test 4 DFU
44 # configurations, but don't want to test every single transfer size
45 # on each, to avoid bloating the overall time taken by testing.
46 "test_sizes": (63, 64, 65),
47 # This value is optional.
48 # The name of the environment variable that the the dfu command reads
49 # alt info from. If unspecified, this defaults to dfu_alt_info, which is
50 # valid for most systems. Some systems use a different variable name.
51 # One example is the Odroid XU3, which automatically generates
52 # $dfu_alt_info, each time the dfu command is run, by concatenating
53 # $dfu_alt_boot and $dfu_alt_system.
54 "alt_info_env_name": "dfu_alt_system",
58 b) udev rules to set permissions on devices nodes, so that sudo is not
59 required. For example:
61 ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="666"
63 (You may wish to change the group ID instead of setting the permissions wide
64 open. All that matters is that the user ID running the test can access the
68 # The set of file sizes to test. These values trigger various edge-cases such
69 # as one less than, equal to, and one greater than typical USB max packet
70 # sizes, and similar boundary conditions.
71 test_sizes_default = (
89 first_usb_dev_port = None
91 @pytest.mark.buildconfigspec('cmd_dfu')
92 def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
93 """Test the "dfu" command; the host system must be able to enumerate a USB
94 device when "dfu" is running, various DFU transfers are tested, and the
95 USB device must disappear when "dfu" is aborted.
98 u_boot_console: A U-Boot console connection.
99 env__usb_dev_port: The single USB device-mode port specification on
100 which to run the test. See the file-level comment above for
101 details of the format.
102 env__dfu_config: The single DFU (memory region) configuration on which
103 to run the test. See the file-level comment above for details
110 # Default alt settings for test and dummy files
111 alt_setting_test_file = 0
112 alt_setting_dummy_file = 1
115 """Start U-Boot's dfu shell command.
117 This also waits for the host-side USB enumeration process to complete.
126 fh = u_boot_utils.attempt_to_open_file(
127 env__usb_dev_port['host_usb_dev_node'])
130 raise Exception('USB device present before dfu command invoked')
132 u_boot_console.log.action(
133 'Starting long-running U-Boot dfu shell command')
135 dfu_alt_info_env = env__dfu_config.get('alt_info_env_name', \
138 cmd = 'setenv "%s" "%s"' % (dfu_alt_info_env,
139 env__dfu_config['alt_info'])
140 u_boot_console.run_command(cmd)
142 cmd = 'dfu 0 ' + env__dfu_config['cmd_params']
143 u_boot_console.run_command(cmd, wait_for_prompt=False)
144 u_boot_console.log.action('Waiting for DFU USB device to appear')
145 fh = u_boot_utils.wait_until_open_succeeds(
146 env__usb_dev_port['host_usb_dev_node'])
149 def stop_dfu(ignore_errors):
150 """Stop U-Boot's dfu shell command from executing.
152 This also waits for the host-side USB de-enumeration process to
156 ignore_errors: Ignore any errors. This is useful if an error has
157 already been detected, and the code is performing best-effort
158 cleanup. In this case, we do not want to mask the original
159 error by "honoring" any new errors.
166 u_boot_console.log.action(
167 'Stopping long-running U-Boot dfu shell command')
168 u_boot_console.ctrlc()
169 u_boot_console.log.action(
170 'Waiting for DFU USB device to disappear')
171 u_boot_utils.wait_until_file_open_fails(
172 env__usb_dev_port['host_usb_dev_node'], ignore_errors)
174 if not ignore_errors:
177 def run_dfu_util(alt_setting, fn, up_dn_load_arg):
178 """Invoke dfu-util on the host.
181 alt_setting: The DFU "alternate setting" identifier to interact
183 fn: The host-side file name to transfer.
184 up_dn_load_arg: '-U' or '-D' depending on whether a DFU upload or
185 download operation should be performed.
191 cmd = ['dfu-util', '-a', str(alt_setting), up_dn_load_arg, fn]
192 if 'host_usb_port_path' in env__usb_dev_port:
193 cmd += ['-p', env__usb_dev_port['host_usb_port_path']]
194 u_boot_utils.run_and_log(u_boot_console, cmd)
195 u_boot_console.wait_for('Ctrl+C to exit ...')
197 def dfu_write(alt_setting, fn):
198 """Write a file to the target board using DFU.
201 alt_setting: The DFU "alternate setting" identifier to interact
203 fn: The host-side file name to transfer.
209 run_dfu_util(alt_setting, fn, '-D')
211 def dfu_read(alt_setting, fn):
212 """Read a file from the target board using DFU.
215 alt_setting: The DFU "alternate setting" identifier to interact
217 fn: The host-side file name to transfer.
223 # dfu-util fails reads/uploads if the host file already exists
224 if os.path.exists(fn):
226 run_dfu_util(alt_setting, fn, '-U')
228 def dfu_write_read_check(size):
229 """Test DFU transfers of a specific size of data
231 This function first writes data to the board then reads it back and
232 compares the written and read back data. Measures are taken to avoid
233 certain types of false positives.
236 size: The data size to test.
242 test_f = u_boot_utils.PersistentRandomFile(u_boot_console,
243 'dfu_%d.bin' % size, size)
244 readback_fn = u_boot_console.config.result_dir + '/dfu_readback.bin'
246 u_boot_console.log.action('Writing test data to DFU primary ' +
248 dfu_write(alt_setting_test_file, test_f.abs_fn)
250 u_boot_console.log.action('Writing dummy data to DFU secondary ' +
251 'altsetting to clear DFU buffers')
252 dfu_write(alt_setting_dummy_file, dummy_f.abs_fn)
254 u_boot_console.log.action('Reading DFU primary altsetting for ' +
256 dfu_read(alt_setting_test_file, readback_fn)
258 u_boot_console.log.action('Comparing written and read data')
259 written_hash = test_f.content_hash
260 read_back_hash = u_boot_utils.md5sum_file(readback_fn, size)
261 assert(written_hash == read_back_hash)
263 # This test may be executed against multiple USB ports. The test takes a
264 # long time, so we don't want to do the whole thing each time. Instead,
265 # execute the full test on the first USB port, and perform a very limited
266 # test on other ports. In the limited case, we solely validate that the
267 # host PC can enumerate the U-Boot USB device.
268 global first_usb_dev_port
269 if not first_usb_dev_port:
270 first_usb_dev_port = env__usb_dev_port
271 if env__usb_dev_port == first_usb_dev_port:
272 sizes = env__dfu_config.get('test_sizes', test_sizes_default)
276 dummy_f = u_boot_utils.PersistentRandomFile(u_boot_console,
277 'dfu_dummy.bin', 1024)
279 ignore_cleanup_errors = True
283 u_boot_console.log.action(
284 'Overwriting DFU primary altsetting with dummy data')
285 dfu_write(alt_setting_test_file, dummy_f.abs_fn)
288 with u_boot_console.log.section('Data size %d' % size):
289 dfu_write_read_check(size)
290 # Make the status of each sub-test obvious. If the test didn't
291 # pass, an exception was thrown so this code isn't executed.
292 u_boot_console.log.status_pass('OK')
293 ignore_cleanup_errors = False
295 stop_dfu(ignore_cleanup_errors)