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",
42 b) udev rules to set permissions on devices nodes, so that sudo is not
43 required. For example:
45 ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="666"
47 (You may wish to change the group ID instead of setting the permissions wide
48 open. All that matters is that the user ID running the test can access the
52 # The set of file sizes to test. These values trigger various edge-cases such
53 # as one less than, equal to, and one greater than typical USB max packet
54 # sizes, and similar boundary conditions.
73 first_usb_dev_port = None
75 @pytest.mark.buildconfigspec('cmd_dfu')
76 def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config):
77 """Test the "dfu" command; the host system must be able to enumerate a USB
78 device when "dfu" is running, various DFU transfers are tested, and the
79 USB device must disappear when "dfu" is aborted.
82 u_boot_console: A U-Boot console connection.
83 env__usb_dev_port: The single USB device-mode port specification on
84 which to run the test. See the file-level comment above for
85 details of the format.
86 env__dfu_config: The single DFU (memory region) configuration on which
87 to run the test. See the file-level comment above for details
95 """Start U-Boot's dfu shell command.
97 This also waits for the host-side USB enumeration process to complete.
106 fh = u_boot_utils.attempt_to_open_file(
107 env__usb_dev_port['host_usb_dev_node'])
110 raise Exception('USB device present before dfu command invoked')
112 u_boot_console.log.action(
113 'Starting long-running U-Boot dfu shell command')
115 cmd = 'setenv dfu_alt_info "%s"' % env__dfu_config['alt_info']
116 u_boot_console.run_command(cmd)
118 cmd = 'dfu 0 ' + env__dfu_config['cmd_params']
119 u_boot_console.run_command(cmd, wait_for_prompt=False)
120 u_boot_console.log.action('Waiting for DFU USB device to appear')
121 fh = u_boot_utils.wait_until_open_succeeds(
122 env__usb_dev_port['host_usb_dev_node'])
125 def stop_dfu(ignore_errors):
126 """Stop U-Boot's dfu shell command from executing.
128 This also waits for the host-side USB de-enumeration process to
132 ignore_errors: Ignore any errors. This is useful if an error has
133 already been detected, and the code is performing best-effort
134 cleanup. In this case, we do not want to mask the original
135 error by "honoring" any new errors.
142 u_boot_console.log.action(
143 'Stopping long-running U-Boot dfu shell command')
144 u_boot_console.ctrlc()
145 u_boot_console.log.action(
146 'Waiting for DFU USB device to disappear')
147 u_boot_utils.wait_until_file_open_fails(
148 env__usb_dev_port['host_usb_dev_node'], ignore_errors)
150 if not ignore_errors:
153 def run_dfu_util(alt_setting, fn, up_dn_load_arg):
154 """Invoke dfu-util on the host.
157 alt_setting: The DFU "alternate setting" identifier to interact
159 fn: The host-side file name to transfer.
160 up_dn_load_arg: '-U' or '-D' depending on whether a DFU upload or
161 download operation should be performed.
167 cmd = ['dfu-util', '-a', str(alt_setting), up_dn_load_arg, fn]
168 if 'host_usb_port_path' in env__usb_dev_port:
169 cmd += ['-p', env__usb_dev_port['host_usb_port_path']]
170 u_boot_utils.run_and_log(u_boot_console, cmd)
171 u_boot_console.wait_for('Ctrl+C to exit ...')
173 def dfu_write(alt_setting, fn):
174 """Write a file to the target board using DFU.
177 alt_setting: The DFU "alternate setting" identifier to interact
179 fn: The host-side file name to transfer.
185 run_dfu_util(alt_setting, fn, '-D')
187 def dfu_read(alt_setting, fn):
188 """Read a file from the target board using DFU.
191 alt_setting: The DFU "alternate setting" identifier to interact
193 fn: The host-side file name to transfer.
199 # dfu-util fails reads/uploads if the host file already exists
200 if os.path.exists(fn):
202 run_dfu_util(alt_setting, fn, '-U')
204 def dfu_write_read_check(size):
205 """Test DFU transfers of a specific size of data
207 This function first writes data to the board then reads it back and
208 compares the written and read back data. Measures are taken to avoid
209 certain types of false positives.
212 size: The data size to test.
218 test_f = u_boot_utils.PersistentRandomFile(u_boot_console,
219 'dfu_%d.bin' % size, size)
220 readback_fn = u_boot_console.config.result_dir + '/dfu_readback.bin'
222 u_boot_console.log.action('Writing test data to DFU primary ' +
224 dfu_write(0, test_f.abs_fn)
226 u_boot_console.log.action('Writing dummy data to DFU secondary ' +
227 'altsetting to clear DFU buffers')
228 dfu_write(1, dummy_f.abs_fn)
230 u_boot_console.log.action('Reading DFU primary altsetting for ' +
232 dfu_read(0, readback_fn)
234 u_boot_console.log.action('Comparing written and read data')
235 written_hash = test_f.content_hash
236 read_back_hash = u_boot_utils.md5sum_file(readback_fn, size)
237 assert(written_hash == read_back_hash)
239 # This test may be executed against multiple USB ports. The test takes a
240 # long time, so we don't want to do the whole thing each time. Instead,
241 # execute the full test on the first USB port, and perform a very limited
242 # test on other ports. In the limited case, we solely validate that the
243 # host PC can enumerate the U-Boot USB device.
244 global first_usb_dev_port
245 if not first_usb_dev_port:
246 first_usb_dev_port = env__usb_dev_port
247 if env__usb_dev_port == first_usb_dev_port:
252 dummy_f = u_boot_utils.PersistentRandomFile(u_boot_console,
253 'dfu_dummy.bin', 1024)
255 ignore_cleanup_errors = True
259 u_boot_console.log.action(
260 'Overwriting DFU primary altsetting with dummy data')
261 dfu_write(0, dummy_f.abs_fn)
264 with u_boot_console.log.section('Data size %d' % size):
265 dfu_write_read_check(size)
266 # Make the status of each sub-test obvious. If the test didn't
267 # pass, an exception was thrown so this code isn't executed.
268 u_boot_console.log.status_pass('OK')
269 ignore_cleanup_errors = False
271 stop_dfu(ignore_cleanup_errors)