drivers/spi/spi-loopback-test.c

3  *  linux/drivers/spi/spi-loopback-test.c
7  *  Loopback test driver to test several typical spi_message conditions
23 #include "spi-test.h"
48 		 "if set controller will be asked to enable test loop mode. " \
62 /* run only a specific test */
66 		 "only run the test with this number (0-based !)");
385 	{ .compatible	= "linux,spi-loopback-test", },
398 		.name = "spi-loopback-test",
407 MODULE_DESCRIPTION("test spi_driver to check core functionality");
472 		/* check for unwritten test pattern on rx_buf */
554 		/* second test after a (hopefull) translation */
573 				       struct spi_test *test)
579 	for (i = 0; i < test->transfer_count; i++) {
580 		struct spi_transfer *xfer = test->transfers + i;
591 	if (test->elapsed_time < estimated_time) {
594 			test->elapsed_time, estimated_time);
708 				 struct spi_test *test)
710 	struct spi_transfer *xfers = test->transfers;
724 	for (i = 0; i < test->transfer_count; i++) {
736 			switch (test->fill_option) {
738 				*tx_buf = test->fill_pattern;
741 				*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
745 				*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
749 				*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
782 					test->fill_option);
792 			      struct spi_test *test,
795 	struct spi_message *msg = &test->msg;
806 	for (i = 0; i < test->transfer_count; i++) {
807 		x = &test->transfers[i];
826 	ret = spi_test_fill_pattern(spi, test);
831 	if (test->execute_msg)
832 		ret = test->execute_msg(spi, test, tx, rx);
834 		ret = spi_test_execute_msg(spi, test, tx, rx);
837 	if (ret == test->expected_return)
841 		"test failed - test returned %i, but we expect %i\n",
842 		ret, test->expected_return);
861 	struct spi_test test;
864 	/* copy the test template to test */
865 	memcpy(&test, testtemplate, sizeof(test));
870 	if (!(test.iterate_transfer_mask & (BIT(test.transfer_count) - 1)))
871 		test.iterate_transfer_mask = 1;
875 	for (i = 0; i < test.transfer_count; i++) {
876 		if (test.transfers[i].tx_buf)
878 		if (test.transfers[i].rx_buf)
888 			      test.description);
894 			      test.description);
900 		dev_info(&spi->dev, "Running test %s\n", test.description);
908 	for (i = 0; i < test.transfer_count; i++) {
910 		if (!(test.iterate_transfer_mask & BIT(i)))
912 		test.transfers[i].len = len;
913 		if (test.transfers[i].tx_buf)
914 			test.transfers[i].tx_buf += tx_off;
915 		if (test.transfers[i].rx_buf)
916 			test.transfers[i].rx_buf += rx_off;
920 	return _spi_test_run_iter(spi, &test, tx, rx);
924  * spi_test_execute_msg - default implementation to run a test
927  * @test: the test to execute, which already contains @msg
928  * @tx:   the tx buffer allocated for the test sequence
929  * @rx:   the rx buffer allocated for the test sequence
933 int spi_test_execute_msg(struct spi_device *spi, struct spi_test *test,
936 	struct spi_message *msg = &test->msg;
951 		test->elapsed_time = ktime_to_ns(ktime_sub(ktime_get(), start));
980 		ret = spi_test_check_elapsed_time(spi, test);
999  * @test: the test which we need to execute
1000  * @tx:   the tx buffer allocated for the test sequence
1001  * @rx:   the rx buffer allocated for the test sequence
1006 int spi_test_run_test(struct spi_device *spi, const struct spi_test *test,
1014 	/* test for transfer limits */
1015 	if (test->transfer_count >= SPI_TEST_MAX_TRANSFERS) {
1018 			test->description, test->transfer_count);
1032 	    var < (test->iterate_##var ?				\
1035 			 test->iterate_##var) :				\
1040 	     (len = test->iterate_len[idx_len]) != -1; idx_len++) {
1046 				ret = spi_test_run_iter(spi, test,
1074 	struct spi_test *test;
1097 	for (test = tests, count = 0; test->description[0];
1098 	     test++, count++) {
1099 		/* only run test if requested */
1103 		if (test->run_test)
1104 			ret = test->run_test(spi, test, tx, rx);
1106 			ret = spi_test_run_test(spi, test, tx, rx);