To run spi-loopback-tests on HW without modifications, we need to
disable Chip Select. This should avoid surprising side effects for
SPI devices by testing patterns.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Several module parameters are local to the source, so make them
static. Cleans up several sparse warnings such as:
"symbol 'loop_req' was not declared. Should it be static?"
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Provide a module parameter to request internal loop by the SPI master
controller.
This should make loop testing easier without extra HW modification.
For test automation a logic analyzer is recommended for host
controller-independent verification.
An example test rig configuration and procedure:
i.MX6S RIoRBoard Logic Analyzer
-----------------------------------------
(J13 4) GND ------------- GND
(J13 6) CSPI3-CLK ------> PIN 3
(J13 8) CSPI3-MOSI <----- PIN 2
^ - internal loop configured by SPI_LOOP
| or can be user external jamper.
(J13 10) CSPI3-MISO -----> PIN 1
grab some data and decode it:
sigrok-cli -d fx2lafw --time 160000 --config samplerate=10m \
--channels 0-2 -o dump.sr
sigrok-cli -i dump.sr -P spi:mosi=1:clk=2 > result_for_regression_tests
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Here, rx/tx allocation can fail. So avoid kvfree call
with NULL pointer.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
trivial fix to spelling mistake in dev_info error message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
trivial fix to spelling mistake in dev_err error message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
A multiplication of 8U * xfer-len with the type of a 32 bit unsigned int
is evaluated using 32 bit arithmetic and then used in a context that
expects an expression of type unsigned long long (64 bits). Avoid any
potential overflow by casting BITS_PER_BYTE to unsigned long long.
Detected by CoverityScan, CID#1419691 ("Unintentional integer overflow")
Fixes: ea9936f324 ("spi: loopback-test: add elapsed time check")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This adds a new test to check whether the spi_transfer.delay_usecs
setting has properly taken effect.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This adds checks whether the elapsed time is longer than the minimam
estimated time. The estimated time is calculated with the total
transfer length per clock rate and optional spi_transfer.delay_usecs.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The spi-loopback-test module currently cannot test the spi_message
including a zero-length transfer. Because the zero-length transfer is
treated as a special value in several meanings.
1. The number of spi_transfer to execute in one test case is described
by spi_test.transfer_count. It is normally computed by counting number
of transfers with len > 0 in spi_test.transfers array.
This change stops the detection for the number of spi_transfer. Each
spi_test.transfer_count needs to be filled by hand now.
2. The spi_test.iterate_len is a list of transfer length to iterate on.
This list is terminated by zero, so zero-length transfer cannot be
included.
This changes the terminal value from 0 to -1.
3. The length for the spi_transfer masked by spi_test.iterate_transfer_mask
is iterated. Before starting the iteration, the default value which
is statically initialized is applied. In order to specify the default
value, zero-length is reserved.
Currently, the default values are always '1'. So this removes this
trick and add '1' to iterate_len list.
By applying all these changes, the spi-loopback-test can execute spi
messages with zero-length transfer.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
When the loopback parameter is set, rx_buf are compared with tx_buf
after the spi_message is executed. But the first byte of buffer is
not checked.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The test "two tx-transfers - alter first" actually alters the second
not the first transfer. Similarly the test "two tx-transfers - alter
second" actually alters the first not the second transfer.
The mismatches for the two symmetrical tests cancel each other's
mistakes. But it's better to fix the mismatches to avoid confusion.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix compile error caused by missing vmalloc() definition
on x86 (and maybe other platforms) by including vmalloc.h.
Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Using vmalloc'ed buffers will use one SG entry for each page,
that may provoke DMA errors for large transfers.
Also vmalloc'ed buffers may cause errors on CPU's with VIVT cache.
Add this option to catch these errors when testing.
Note that to catch VIVT cache errors, checking the rx range
has to be disabled, so this option has been added as well.
Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
We get 1 warning when building kernel with W=1:
drivers/spi/spi-loopback-test.c:408:5: warning: no previous prototype for 'rx_ranges_cmp' [-Wmissing-prototypes]
In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
So this patch marks it 'static'.
Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
trivial fix to spelling mistake in dev_err message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
These variables are always used uninitialized:
drivers/spi/spi-loopback-test.c: In function 'spi_test_run_iter':
drivers/spi/spi-loopback-test.c:768:17: warning: 'rx_count' may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/spi/spi-loopback-test.c:762:17: warning: 'tx_count' may be used uninitialized in this function [-Wmaybe-uninitialized]
Adding an explicit initialization seems to be the only
workable solution here, to make the code behave correctly
and build without warning.
Fixes: 84e0c4e5e2 ("spi: add loopback test driver to allow for spi_master regression tests")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
There should be an 's' on "dump_message" so it matches the module_param.
Fixes: 84e0c4e5e2 ('spi: add loopback test driver to allow for spi_master regression tests')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The spi_check_rx_ranges can always get executed independent of
if we have a real loopback situation.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Rename method spi_test_fill_tx to spi_test_fill_pattern
to better describe what it does.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Currently the rx_buf does not get set with the
SPI_TEST_PATTERN_UNWRITTEN when tx_buf == NULL in the transfer.
Reorder code so that it gets done also under this specific condition.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The test "two tx+rx transfers - alter second" actually modifies
the first not the second transfer, which - in conjunction with
testing the read data - results also in overwriting data read
earlier.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Fixes the reported printk format issues reported by kbuild-test-robot.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver is submitting lots of distinct spi-messages messages
with all kinds of alignments and length pattern.
Also distinct kinds of transfer pattern tests are implemented
(rx, tx, rx/tx, tx+tx, tx+rx,...)
Right now on a raspberry pi 752 distinct spi_messages are executed
in 13 different scenarios.
Configuration of additional test-pattern is easy, so that when
new bugs in drivers get detected the relevant transfer pattern can
also get added to the test framework, so that such situations are
detected in other drivers as well.
The idea behind this driver is to make it possible to also detect
regressions in spi_master implementations when changes occur.
Potentially these tests could get executed automatically in a
test-server-farm.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Oleksij Rempel