def sf_read(u_boot_console, env__sf_config, sf_params):
"""Helper function used to read and compute the CRC32 value of a section of
SPI Flash memory.
Args:
u_boot_console: A U-Boot console connection.
env__sf_config: The single SPI Flash device configuration on which to
run the tests.
sf_params: SPI Flash parameters.
Returns:
CRC32 value of SPI Flash section
"""
addr = sf_params['ram_base']
offset = env__sf_config['offset']
count = sf_params['len']
pattern = random.randint(0, 0xFF)
crc_expected = env__sf_config.get('crc32', None)
cmd = 'mw.b %08x %02x %x' % (addr, pattern, count)
u_boot_console.run_command(cmd)
crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count)
if crc_expected:
assert crc_pattern != crc_expected
cmd = 'sf read %08x %08x %x' % (addr, offset, count)
response = u_boot_console.run_command(cmd)
assert 'Read: OK' in response, 'Read operation failed'
crc_readback = u_boot_utils.crc32(u_boot_console, addr, count)
assert crc_pattern != crc_readback, 'sf read did not update RAM content.'
if crc_expected:
assert crc_readback == crc_expected
return crc_readback
def sf_update(u_boot_console, env__sf_config, sf_params):
"""Helper function used to update a section of SPI Flash memory.
Args:
u_boot_console: A U-Boot console connection.
env__sf_config: The single SPI Flash device configuration on which to
run the tests.
Returns:
CRC32 value of SPI Flash section
"""
addr = sf_params['ram_base']
offset = env__sf_config['offset']
count = sf_params['len']
pattern = int(random.random() * 0xFF)
cmd = 'mw.b %08x %02x %x' % (addr, pattern, count)
u_boot_console.run_command(cmd)
crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count)
cmd = 'sf update %08x %08x %x' % (addr, offset, count)
u_boot_console.run_command(cmd)
crc_readback = sf_read(u_boot_console, env__sf_config, sf_params)
assert crc_readback == crc_pattern
def test_sf_erase(u_boot_console, env__sf_config):
if not env__sf_config.get('writeable', False):
pytest.skip('Flash config is tagged as not writeable')
sf_params = sf_prepare(u_boot_console, env__sf_config)
addr = sf_params['ram_base']
offset = env__sf_config['offset']
count = sf_params['len']
cmd = 'sf erase %08x %x' % (offset, count)
output = u_boot_console.run_command(cmd)
assert 'Erased: OK' in output, 'Erase operation failed'
cmd = 'mw.b %08x ff %x' % (addr, count)
u_boot_console.run_command(cmd)
crc_ffs = u_boot_utils.crc32(u_boot_console, addr, count)
crc_read = sf_read(u_boot_console, env__sf_config, sf_params)
assert crc_ffs == crc_read, 'Unexpected CRC32 after erase operation.'