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test/py: add spi_flash tests
Add basic tests for the spi_flash subsystem. Signed-off-by: Liam Beguin <liambeguin@gmail.com> Reviewed-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Liam Beguin
Tom Rini
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1 changed files with 218 additions and 0 deletions
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test/py/tests/test_sf.py
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test/py/tests/test_sf.py
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# Copyright (c) 2016, Xilinx Inc. Michal Simek
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# Copyright (c) 2017, Xiphos Systems Corp. All rights reserved.
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#
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# SPDX-License-Identifier: GPL-2.0
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import re
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import pytest
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import random
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import u_boot_utils
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"""
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Note: This test relies on boardenv_* containing configuration values to define
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which SPI Flash areas are available for testing. Without this, this test will
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be automatically skipped.
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For example:
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# A list of sections of Flash memory to be tested.
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env__sf_configs = (
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{
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# Where in SPI Flash should the test operate.
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'offset': 0x00000000,
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# This value is optional.
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# If present, specifies the [[bus:]cs] argument used in `sf probe`
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# If missing, defaults to 0.
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'id': '0:1',
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# This value is optional.
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# If set as a number, specifies the speed of the SPI Flash.
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# If set as an array of 2, specifies a range for a random speed.
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# If missing, defaults to 0.
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'speed': 1000000,
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# This value is optional.
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# If present, specifies the size to use for read/write operations.
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# If missing, the SPI Flash page size is used as a default (based on
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# the `sf probe` output).
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'len': 0x10000,
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# This value is optional.
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# If present, specifies if the test can write to Flash offset
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# If missing, defaults to False.
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'writeable': False,
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# This value is optional.
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# If present, specifies the expected CRC32 value of the flash area.
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# If missing, extra check is ignored.
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'crc32': 0xCAFECAFE,
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},
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)
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"""
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def sf_prepare(u_boot_console, env__sf_config):
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"""Check global state of the SPI Flash before running any test.
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Args:
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u_boot_console: A U-Boot console connection.
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env__sf_config: The single SPI Flash device configuration on which to
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run the tests.
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Returns:
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sf_params: a dictionary of SPI Flash parameters.
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"""
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sf_params = {}
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sf_params['ram_base'] = u_boot_utils.find_ram_base(u_boot_console)
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probe_id = env__sf_config.get('id', 0)
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speed = env__sf_config.get('speed', 0)
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if isinstance(speed, int):
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sf_params['speed'] = speed
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else:
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assert len(speed) == 2, "If speed is a list, it must have 2 entries"
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sf_params['speed'] = random.randint(speed[0], speed[1])
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cmd = 'sf probe %d %d' % (probe_id, sf_params['speed'])
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output = u_boot_console.run_command(cmd)
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assert 'SF: Detected' in output, 'No Flash device available'
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m = re.search('page size (.+?) Bytes', output)
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assert m, 'SPI Flash page size not recognized'
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sf_params['page_size'] = int(m.group(1))
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m = re.search('erase size (.+?) KiB', output)
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assert m, 'SPI Flash erase size not recognized'
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sf_params['erase_size'] = int(m.group(1))
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sf_params['erase_size'] *= 1024
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m = re.search('total (.+?) MiB', output)
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assert m, 'SPI Flash total size not recognized'
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sf_params['total_size'] = int(m.group(1))
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sf_params['total_size'] *= 1024 * 1024
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assert 'offset' in env__sf_config, \
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'\'offset\' is required for this test.'
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sf_params['len'] = env__sf_config.get('len', sf_params['erase_size'])
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assert not env__sf_config['offset'] % sf_params['erase_size'], \
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'offset not multiple of erase size.'
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assert not sf_params['len'] % sf_params['erase_size'], \
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'erase length not multiple of erase size.'
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assert not (env__sf_config.get('writeable', False) and
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'crc32' in env__sf_config), \
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'Cannot check crc32 on writeable sections'
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return sf_params
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def sf_read(u_boot_console, env__sf_config, sf_params):
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"""Helper function used to read and compute the CRC32 value of a section of
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SPI Flash memory.
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Args:
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u_boot_console: A U-Boot console connection.
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env__sf_config: The single SPI Flash device configuration on which to
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run the tests.
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sf_params: SPI Flash parameters.
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Returns:
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CRC32 value of SPI Flash section
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"""
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addr = sf_params['ram_base']
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offset = env__sf_config['offset']
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count = sf_params['len']
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pattern = random.randint(0, 0xFF)
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crc_expected = env__sf_config.get('crc32', None)
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cmd = 'mw.b %08x %02x %x' % (addr, pattern, count)
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u_boot_console.run_command(cmd)
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crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count)
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if crc_expected:
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assert crc_pattern != crc_expected
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cmd = 'sf read %08x %08x %x' % (addr, offset, count)
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response = u_boot_console.run_command(cmd)
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assert 'Read: OK' in response, 'Read operation failed'
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crc_readback = u_boot_utils.crc32(u_boot_console, addr, count)
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assert crc_pattern != crc_readback, 'sf read did not update RAM content.'
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if crc_expected:
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assert crc_readback == crc_expected
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return crc_readback
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def sf_update(u_boot_console, env__sf_config, sf_params):
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"""Helper function used to update a section of SPI Flash memory.
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Args:
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u_boot_console: A U-Boot console connection.
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env__sf_config: The single SPI Flash device configuration on which to
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run the tests.
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Returns:
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CRC32 value of SPI Flash section
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"""
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addr = sf_params['ram_base']
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offset = env__sf_config['offset']
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count = sf_params['len']
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pattern = int(random.random() * 0xFF)
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cmd = 'mw.b %08x %02x %x' % (addr, pattern, count)
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u_boot_console.run_command(cmd)
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crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count)
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cmd = 'sf update %08x %08x %x' % (addr, offset, count)
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u_boot_console.run_command(cmd)
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crc_readback = sf_read(u_boot_console, env__sf_config, sf_params)
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assert crc_readback == crc_pattern
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@pytest.mark.buildconfigspec('cmd_sf')
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@pytest.mark.buildconfigspec('cmd_crc32')
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@pytest.mark.buildconfigspec('cmd_memory')
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def test_sf_read(u_boot_console, env__sf_config):
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sf_params = sf_prepare(u_boot_console, env__sf_config)
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sf_read(u_boot_console, env__sf_config, sf_params)
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@pytest.mark.buildconfigspec('cmd_sf')
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@pytest.mark.buildconfigspec('cmd_crc32')
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@pytest.mark.buildconfigspec('cmd_memory')
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def test_sf_read_twice(u_boot_console, env__sf_config):
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sf_params = sf_prepare(u_boot_console, env__sf_config)
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crc1 = sf_read(u_boot_console, env__sf_config, sf_params)
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sf_params['ram_base'] += 0x100
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crc2 = sf_read(u_boot_console, env__sf_config, sf_params)
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assert crc1 == crc2, 'CRC32 of two successive read operation do not match'
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@pytest.mark.buildconfigspec('cmd_sf')
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@pytest.mark.buildconfigspec('cmd_crc32')
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@pytest.mark.buildconfigspec('cmd_memory')
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def test_sf_erase(u_boot_console, env__sf_config):
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if not env__sf_config.get('writeable', False):
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pytest.skip('Flash config is tagged as not writeable')
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sf_params = sf_prepare(u_boot_console, env__sf_config)
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addr = sf_params['ram_base']
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offset = env__sf_config['offset']
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count = sf_params['len']
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cmd = 'sf erase %08x %x' % (offset, count)
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output = u_boot_console.run_command(cmd)
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assert 'Erased: OK' in output, 'Erase operation failed'
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cmd = 'mw.b %08x ff %x' % (addr, count)
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u_boot_console.run_command(cmd)
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crc_ffs = u_boot_utils.crc32(u_boot_console, addr, count)
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crc_read = sf_read(u_boot_console, env__sf_config, sf_params)
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assert crc_ffs == crc_read, 'Unexpected CRC32 after erase operation.'
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@pytest.mark.buildconfigspec('cmd_sf')
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@pytest.mark.buildconfigspec('cmd_crc32')
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@pytest.mark.buildconfigspec('cmd_memory')
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def test_sf_update(u_boot_console, env__sf_config):
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if not env__sf_config.get('writeable', False):
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pytest.skip('Flash config is tagged as not writeable')
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sf_params = sf_prepare(u_boot_console, env__sf_config)
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sf_update(u_boot_console, env__sf_config, sf_params)
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