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Diffstat (limited to 'drivers/spi/spi-test.h')
| -rw-r--r-- | drivers/spi/spi-test.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/spi/spi-test.h b/drivers/spi/spi-test.h new file mode 100644 index 000000000000..922c52833239 --- /dev/null +++ b/drivers/spi/spi-test.h @@ -0,0 +1,136 @@ +/* + * linux/drivers/spi/spi-test.h + * + * (c) Martin Sperl <kernel@martin.sperl.org> + * + * spi_test definitions + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/spi/spi.h> + +#define SPI_TEST_MAX_TRANSFERS 4 +#define SPI_TEST_MAX_SIZE (32 * PAGE_SIZE) +#define SPI_TEST_MAX_ITERATE 32 + +/* the "dummy" start addresses used in spi_test + * these addresses get translated at a later stage + */ +#define RX_START BIT(30) +#define TX_START BIT(31) +#define RX(off) ((void *)(RX_START + off)) +#define TX(off) ((void *)(TX_START + off)) + +/* some special defines for offsets */ +#define SPI_TEST_MAX_SIZE_HALF BIT(29) + +/* detection pattern for unfinished reads... + * - 0x00 or 0xff could be valid levels for tx_buf = NULL, + * so we do not use either of them + */ +#define SPI_TEST_PATTERN_UNWRITTEN 0xAA +#define SPI_TEST_PATTERN_DO_NOT_WRITE 0x55 +#define SPI_TEST_CHECK_DO_NOT_WRITE 64 + +/** + * struct spi_test - describes a specific (set of) tests to execute + * + * @description: description of the test + * + * @msg: a template @spi_message usedfor the default settings + * @transfers: array of @spi_transfers that are part of the + * resulting spi_message. The first transfer with len == 0 + * signifies the end of the list + * @transfer_count: normally computed number of transfers with len > 0 + * + * @run_test: run a specific spi_test - this allows to override + * the default implementation of @spi_test_run_transfer + * either to add some custom filters for a specific test + * or to effectively run some very custom tests... + * @execute_msg: run the spi_message for real - this allows to override + * @spi_test_execute_msg to apply final modifications + * on the spi_message + * @expected_return: the expected return code - in some cases we want to + * test also for error conditions + * + * @iterate_len: list of length to iterate on (in addition to the + * explicitly set @spi_transfer.len) + * @iterate_tx_align: change the alignment of @spi_transfer.tx_buf + * for all values in the below range if set. + * the ranges are: + * [0 : @spi_master.dma_alignment[ if set + * [0 : iterate_tx_align[ if unset + * @iterate_rx_align: change the alignment of @spi_transfer.rx_buf + * see @iterate_tx_align for details + * @iterate_transfer_mask: the bitmask of transfers to which the iterations + * apply - if 0, then it applies to all transfer + * + * @fill_option: define the way how tx_buf is filled + * @fill_pattern: fill pattern to apply to the tx_buf + * (used in some of the @fill_options) + */ + +struct spi_test { + char description[64]; + struct spi_message msg; + struct spi_transfer transfers[SPI_TEST_MAX_TRANSFERS]; + unsigned int transfer_count; + int (*run_test)(struct spi_device *spi, struct spi_test *test, + void *tx, void *rx); + int (*execute_msg)(struct spi_device *spi, struct spi_test *test, + void *tx, void *rx); + int expected_return; + /* iterate over all the non-zero values */ + int iterate_len[SPI_TEST_MAX_ITERATE]; + int iterate_tx_align; + int iterate_rx_align; + u32 iterate_transfer_mask; + /* the tx-fill operation */ + u32 fill_option; +#define FILL_MEMSET_8 0 /* just memset with 8 bit */ +#define FILL_MEMSET_16 1 /* just memset with 16 bit */ +#define FILL_MEMSET_24 2 /* just memset with 24 bit */ +#define FILL_MEMSET_32 3 /* just memset with 32 bit */ +#define FILL_COUNT_8 4 /* fill with a 8 byte counter */ +#define FILL_COUNT_16 5 /* fill with a 16 bit counter */ +#define FILL_COUNT_24 6 /* fill with a 24 bit counter */ +#define FILL_COUNT_32 7 /* fill with a 32 bit counter */ +#define FILL_TRANSFER_BYTE_8 8 /* fill with the transfer byte - 8 bit */ +#define FILL_TRANSFER_BYTE_16 9 /* fill with the transfer byte - 16 bit */ +#define FILL_TRANSFER_BYTE_24 10 /* fill with the transfer byte - 24 bit */ +#define FILL_TRANSFER_BYTE_32 11 /* fill with the transfer byte - 32 bit */ +#define FILL_TRANSFER_NUM 16 /* fill with the transfer number */ + u32 fill_pattern; +}; + +/* default implementation for @spi_test.run_test */ +int spi_test_run_test(struct spi_device *spi, + const struct spi_test *test, + void *tx, void *rx); + +/* default implementation for @spi_test.execute_msg */ +int spi_test_execute_msg(struct spi_device *spi, + struct spi_test *test, + void *tx, void *rx); + +/* function to execute a set of tests */ +int spi_test_run_tests(struct spi_device *spi, + struct spi_test *tests); + +/* some of the default @spi_transfer.len to test */ +#define ITERATE_LEN 2, 3, 7, 11, 16, 31, 32, 64, 97, 128, 251, 256, \ + 1021, 1024, 1031, 4093, PAGE_SIZE, 4099, 65536, 65537 + +#define ITERATE_MAX_LEN ITERATE_LEN, SPI_TEST_MAX_SIZE - 1, SPI_TEST_MAX_SIZE + +/* the default alignment to test */ +#define ITERATE_ALIGN sizeof(int) |