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",
33 # Optional entries (required only when "alt_id_test_file" and
34 # "alt_id_dummy_file" are specified).
35 test_file_name = "/dfu_test.bin"
36 dummy_file_name = "/dfu_dummy.bin"
37 # Above files are used to generate proper "alt_info" entry
38 "alt_info": "/%s ext4 0 2;/%s ext4 0 2" % (test_file_name, dummy_file_name),
44 "alt_info": "/dfu_test.bin ext4 0 1;/dfu_dummy.bin ext4 0 1",
45 "cmd_params": "mmc 0",
46 # This value is optional.
47 # If present, it specified the set of transfer sizes tested.
48 # If missing, a default list of sizes will be used, which covers
49 # various useful corner cases.
50 # Manually specifying test sizes is useful if you wish to test 4 DFU
51 # configurations, but don't want to test every single transfer size
52 # on each, to avoid bloating the overall time taken by testing.
53 "test_sizes": (63, 64, 65),
54 # This value is optional.
55 # The name of the environment variable that the the dfu command reads
56 # alt info from. If unspecified, this defaults to dfu_alt_info, which is
57 # valid for most systems. Some systems use a different variable name.
58 # One example is the Odroid XU3, which automatically generates
59 # $dfu_alt_info, each time the dfu command is run, by concatenating
60 # $dfu_alt_boot and $dfu_alt_system.
61 "alt_info_env_name": "dfu_alt_system",
62 # This value is optional.
63 # For boards which require the "test file" alt setting number other than
64 # default (0) it is possible to specify exact file name to be used as
66 "alt_id_test_file": test_file_name,
67 # This value is optional.
68 # For boards which require the "dummy file" alt setting number other
69 # than default (1) it is possible to specify exact file name to be used
71 "alt_id_dummy_file": dummy_file_name,
75 b) udev rules to set permissions on devices nodes, so that sudo is not
76 required. For example:
78 ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="666"
80 (You may wish to change the group ID instead of setting the permissions wide
81 open. All that matters is that the user ID running the test can access the
85 # The set of file sizes to test. These values trigger various edge-cases such
86 # as one less than, equal to, and one greater than typical USB max packet
87 # sizes, and similar boundary conditions.
88 test_sizes_default = (
106 first_usb_dev_port = None
108 @pytest.mark.buildconfigspec('cmd_dfu')
109 def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
110 """Test the "dfu" command; the host system must be able to enumerate a USB
111 device when "dfu" is running, various DFU transfers are tested, and the
112 USB device must disappear when "dfu" is aborted.
115 u_boot_console: A U-Boot console connection.
116 env__usb_dev_port: The single USB device-mode port specification on
117 which to run the test. See the file-level comment above for
118 details of the format.
119 env__dfu_config: The single DFU (memory region) configuration on which
120 to run the test. See the file-level comment above for details
128 """Start U-Boot's dfu shell command.
130 This also waits for the host-side USB enumeration process to complete.
139 u_boot_utils.wait_until_file_open_fails(
140 env__usb_dev_port['host_usb_dev_node'], True)
141 fh = u_boot_utils.attempt_to_open_file(
142 env__usb_dev_port['host_usb_dev_node'])
145 raise Exception('USB device present before dfu command invoked')
147 u_boot_console.log.action(
148 'Starting long-running U-Boot dfu shell command')
150 dfu_alt_info_env = env__dfu_config.get('alt_info_env_name', \
153 cmd = 'setenv "%s" "%s"' % (dfu_alt_info_env,
154 env__dfu_config['alt_info'])
155 u_boot_console.run_command(cmd)
157 cmd = 'dfu 0 ' + env__dfu_config['cmd_params']
158 u_boot_console.run_command(cmd, wait_for_prompt=False)
159 u_boot_console.log.action('Waiting for DFU USB device to appear')
160 fh = u_boot_utils.wait_until_open_succeeds(
161 env__usb_dev_port['host_usb_dev_node'])
164 def stop_dfu(ignore_errors):
165 """Stop U-Boot's dfu shell command from executing.
167 This also waits for the host-side USB de-enumeration process to
171 ignore_errors: Ignore any errors. This is useful if an error has
172 already been detected, and the code is performing best-effort
173 cleanup. In this case, we do not want to mask the original
174 error by "honoring" any new errors.
181 u_boot_console.log.action(
182 'Stopping long-running U-Boot dfu shell command')
183 u_boot_console.ctrlc()
184 u_boot_console.log.action(
185 'Waiting for DFU USB device to disappear')
186 u_boot_utils.wait_until_file_open_fails(
187 env__usb_dev_port['host_usb_dev_node'], ignore_errors)
189 if not ignore_errors:
192 def run_dfu_util(alt_setting, fn, up_dn_load_arg):
193 """Invoke dfu-util on the host.
196 alt_setting: The DFU "alternate setting" identifier to interact
198 fn: The host-side file name to transfer.
199 up_dn_load_arg: '-U' or '-D' depending on whether a DFU upload or
200 download operation should be performed.
206 cmd = ['dfu-util', '-a', alt_setting, up_dn_load_arg, fn]
207 if 'host_usb_port_path' in env__usb_dev_port:
208 cmd += ['-p', env__usb_dev_port['host_usb_port_path']]
209 u_boot_utils.run_and_log(u_boot_console, cmd)
210 u_boot_console.wait_for('Ctrl+C to exit ...')
212 def dfu_write(alt_setting, fn):
213 """Write a file to the target board using DFU.
216 alt_setting: The DFU "alternate setting" identifier to interact
218 fn: The host-side file name to transfer.
224 run_dfu_util(alt_setting, fn, '-D')
226 def dfu_read(alt_setting, fn):
227 """Read a file from the target board using DFU.
230 alt_setting: The DFU "alternate setting" identifier to interact
232 fn: The host-side file name to transfer.
238 # dfu-util fails reads/uploads if the host file already exists
239 if os.path.exists(fn):
241 run_dfu_util(alt_setting, fn, '-U')
243 def dfu_write_read_check(size):
244 """Test DFU transfers of a specific size of data
246 This function first writes data to the board then reads it back and
247 compares the written and read back data. Measures are taken to avoid
248 certain types of false positives.
251 size: The data size to test.
257 test_f = u_boot_utils.PersistentRandomFile(u_boot_console,
258 'dfu_%d.bin' % size, size)
259 readback_fn = u_boot_console.config.result_dir + '/dfu_readback.bin'
261 u_boot_console.log.action('Writing test data to DFU primary ' +
263 dfu_write(alt_setting_test_file, test_f.abs_fn)
265 u_boot_console.log.action('Writing dummy data to DFU secondary ' +
266 'altsetting to clear DFU buffers')
267 dfu_write(alt_setting_dummy_file, dummy_f.abs_fn)
269 u_boot_console.log.action('Reading DFU primary altsetting for ' +
271 dfu_read(alt_setting_test_file, readback_fn)
273 u_boot_console.log.action('Comparing written and read data')
274 written_hash = test_f.content_hash
275 read_back_hash = u_boot_utils.md5sum_file(readback_fn, size)
276 assert(written_hash == read_back_hash)
278 # This test may be executed against multiple USB ports. The test takes a
279 # long time, so we don't want to do the whole thing each time. Instead,
280 # execute the full test on the first USB port, and perform a very limited
281 # test on other ports. In the limited case, we solely validate that the
282 # host PC can enumerate the U-Boot USB device.
283 global first_usb_dev_port
284 if not first_usb_dev_port:
285 first_usb_dev_port = env__usb_dev_port
286 if env__usb_dev_port == first_usb_dev_port:
287 sizes = env__dfu_config.get('test_sizes', test_sizes_default)
291 dummy_f = u_boot_utils.PersistentRandomFile(u_boot_console,
292 'dfu_dummy.bin', 1024)
294 alt_setting_test_file = env__dfu_config.get('alt_id_test_file', '0')
295 alt_setting_dummy_file = env__dfu_config.get('alt_id_dummy_file', '1')
297 ignore_cleanup_errors = True
301 u_boot_console.log.action(
302 'Overwriting DFU primary altsetting with dummy data')
303 dfu_write(alt_setting_test_file, dummy_f.abs_fn)
306 with u_boot_console.log.section('Data size %d' % size):
307 dfu_write_read_check(size)
308 # Make the status of each sub-test obvious. If the test didn't
309 # pass, an exception was thrown so this code isn't executed.
310 u_boot_console.log.status_pass('OK')
311 ignore_cleanup_errors = False
313 stop_dfu(ignore_cleanup_errors)