/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* linux/drivers/spi/spi-test.h
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*
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* (c) Martin Sperl <kernel@martin.sperl.org>
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*
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* spi_test definitions
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*/
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#include <linux/spi/spi.h>
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#define SPI_TEST_MAX_TRANSFERS 4
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#define SPI_TEST_MAX_SIZE (32 * PAGE_SIZE)
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#define SPI_TEST_MAX_ITERATE 32
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/* the "dummy" start addresses used in spi_test
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* these addresses get translated at a later stage
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*/
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#define RX_START BIT(30)
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#define TX_START BIT(31)
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#define RX(off) ((void *)(RX_START + off))
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#define TX(off) ((void *)(TX_START + off))
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/* some special defines for offsets */
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#define SPI_TEST_MAX_SIZE_HALF BIT(29)
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/* detection pattern for unfinished reads...
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* - 0x00 or 0xff could be valid levels for tx_buf = NULL,
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* so we do not use either of them
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*/
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#define SPI_TEST_PATTERN_UNWRITTEN 0xAA
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#define SPI_TEST_PATTERN_DO_NOT_WRITE 0x55
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#define SPI_TEST_CHECK_DO_NOT_WRITE 64
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/**
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* struct spi_test - describes a specific (set of) tests to execute
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*
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* @description: description of the test
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*
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* @msg: a template @spi_message usedfor the default settings
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* @transfers: array of @spi_transfers that are part of the
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* resulting spi_message.
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* @transfer_count: number of transfers
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*
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* @run_test: run a specific spi_test - this allows to override
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* the default implementation of @spi_test_run_transfer
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* either to add some custom filters for a specific test
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* or to effectively run some very custom tests...
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* @execute_msg: run the spi_message for real - this allows to override
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* @spi_test_execute_msg to apply final modifications
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* on the spi_message
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* @expected_return: the expected return code - in some cases we want to
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* test also for error conditions
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*
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* @iterate_len: list of length to iterate on
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* @iterate_tx_align: change the alignment of @spi_transfer.tx_buf
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* for all values in the below range if set.
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* the ranges are:
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* [0 : @spi_master.dma_alignment[ if set
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* [0 : iterate_tx_align[ if unset
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* @iterate_rx_align: change the alignment of @spi_transfer.rx_buf
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* see @iterate_tx_align for details
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* @iterate_transfer_mask: the bitmask of transfers to which the iterations
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* apply - if 0, then it applies to all transfer
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*
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* @fill_option: define the way how tx_buf is filled
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* @fill_pattern: fill pattern to apply to the tx_buf
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* (used in some of the @fill_options)
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* @elapsed_time: elapsed time in nanoseconds
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*/
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struct spi_test {
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char description[64];
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struct spi_message msg;
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struct spi_transfer transfers[SPI_TEST_MAX_TRANSFERS];
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unsigned int transfer_count;
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int (*run_test)(struct spi_device *spi, struct spi_test *test,
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void *tx, void *rx);
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int (*execute_msg)(struct spi_device *spi, struct spi_test *test,
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void *tx, void *rx);
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int expected_return;
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/* iterate over all values, terminated by a -1 */
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int iterate_len[SPI_TEST_MAX_ITERATE];
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int iterate_tx_align;
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int iterate_rx_align;
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u32 iterate_transfer_mask;
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/* the tx-fill operation */
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u32 fill_option;
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#define FILL_MEMSET_8 0 /* just memset with 8 bit */
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#define FILL_MEMSET_16 1 /* just memset with 16 bit */
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#define FILL_MEMSET_24 2 /* just memset with 24 bit */
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#define FILL_MEMSET_32 3 /* just memset with 32 bit */
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#define FILL_COUNT_8 4 /* fill with a 8 byte counter */
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#define FILL_COUNT_16 5 /* fill with a 16 bit counter */
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#define FILL_COUNT_24 6 /* fill with a 24 bit counter */
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#define FILL_COUNT_32 7 /* fill with a 32 bit counter */
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#define FILL_TRANSFER_BYTE_8 8 /* fill with the transfer byte - 8 bit */
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#define FILL_TRANSFER_BYTE_16 9 /* fill with the transfer byte - 16 bit */
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#define FILL_TRANSFER_BYTE_24 10 /* fill with the transfer byte - 24 bit */
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#define FILL_TRANSFER_BYTE_32 11 /* fill with the transfer byte - 32 bit */
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#define FILL_TRANSFER_NUM 16 /* fill with the transfer number */
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u32 fill_pattern;
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unsigned long long elapsed_time;
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};
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/* default implementation for @spi_test.run_test */
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int spi_test_run_test(struct spi_device *spi,
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const struct spi_test *test,
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void *tx, void *rx);
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/* default implementation for @spi_test.execute_msg */
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int spi_test_execute_msg(struct spi_device *spi,
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struct spi_test *test,
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void *tx, void *rx);
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/* function to execute a set of tests */
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int spi_test_run_tests(struct spi_device *spi,
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struct spi_test *tests);
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#define ITERATE_LEN_LIST 0, 1, 2, 3, 7, 11, 16, 31, 32, 64, 97, 128, 251, 256, \
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1021, 1024, 1031, 4093, PAGE_SIZE, 4099, 65536, 65537
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/* some of the default @spi_transfer.len to test, terminated by a -1 */
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#define ITERATE_LEN ITERATE_LEN_LIST, -1
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#define ITERATE_MAX_LEN ITERATE_LEN_LIST, (SPI_TEST_MAX_SIZE - 1), \
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SPI_TEST_MAX_SIZE, -1
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/* the default alignment to test */
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#define ITERATE_ALIGN sizeof(int)
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