1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *  linux/drivers/spi/spi-test.h
4 *
5 *  (c) Martin Sperl <kernel@martin.sperl.org>
6 *
7 *  spi_test definitions
8 */
9
10#include <linux/spi/spi.h>
11
12#define SPI_TEST_MAX_TRANSFERS 4
13#define SPI_TEST_MAX_SIZE (32 * PAGE_SIZE)
14#define SPI_TEST_MAX_ITERATE 32
15
16/* the "dummy" start addresses used in spi_test
17 * these addresses get translated at a later stage
18 */
19#define RX_START	BIT(30)
20#define TX_START	BIT(31)
21#define RX(off)		((void *)(RX_START + off))
22#define TX(off)		((void *)(TX_START + off))
23
24/* some special defines for offsets */
25#define SPI_TEST_MAX_SIZE_HALF	BIT(29)
26
27/* detection pattern for unfinished reads...
28 * - 0x00 or 0xff could be valid levels for tx_buf = NULL,
29 * so we do not use either of them
30 */
31#define SPI_TEST_PATTERN_UNWRITTEN 0xAA
32#define SPI_TEST_PATTERN_DO_NOT_WRITE 0x55
33#define SPI_TEST_CHECK_DO_NOT_WRITE 64
34
35/**
36 * struct spi_test - describes a specific (set of) tests to execute
37 *
38 * @description:      description of the test
39 *
40 * @msg:              a template @spi_message usedfor the default settings
41 * @transfers:        array of @spi_transfers that are part of the
42 *                    resulting spi_message.
43 * @transfer_count:   number of transfers
44 *
45 * @run_test:         run a specific spi_test - this allows to override
46 *                    the default implementation of @spi_test_run_transfer
47 *                    either to add some custom filters for a specific test
48 *                    or to effectively run some very custom tests...
49 * @execute_msg:      run the spi_message for real - this allows to override
50 *                    @spi_test_execute_msg to apply final modifications
51 *                    on the spi_message
52 * @expected_return:  the expected return code - in some cases we want to
53 *                    test also for error conditions
54 *
55 * @iterate_len:      list of length to iterate on
56 * @iterate_tx_align: change the alignment of @spi_transfer.tx_buf
57 *                    for all values in the below range if set.
58 *                    the ranges are:
59 *                    [0 : @spi_master.dma_alignment[ if set
60 *                    [0 : iterate_tx_align[ if unset
61 * @iterate_rx_align: change the alignment of @spi_transfer.rx_buf
62 *                    see @iterate_tx_align for details
63 * @iterate_transfer_mask: the bitmask of transfers to which the iterations
64 *                         apply - if 0, then it applies to all transfer
65 *
66 * @fill_option:      define the way how tx_buf is filled
67 * @fill_pattern:     fill pattern to apply to the tx_buf
68 *                    (used in some of the @fill_options)
69 * @elapsed_time:     elapsed time in nanoseconds
70 */
71
72struct spi_test {
73	char description[64];
74	struct spi_message msg;
75	struct spi_transfer transfers[SPI_TEST_MAX_TRANSFERS];
76	unsigned int transfer_count;
77	int (*run_test)(struct spi_device *spi, struct spi_test *test,
78			void *tx, void *rx);
79	int (*execute_msg)(struct spi_device *spi, struct spi_test *test,
80			   void *tx, void *rx);
81	int expected_return;
82	/* iterate over all values, terminated by a -1 */
83	int iterate_len[SPI_TEST_MAX_ITERATE];
84	int iterate_tx_align;
85	int iterate_rx_align;
86	u32 iterate_transfer_mask;
87	/* the tx-fill operation */
88	u32 fill_option;
89#define FILL_MEMSET_8	0	/* just memset with 8 bit */
90#define FILL_MEMSET_16	1	/* just memset with 16 bit */
91#define FILL_MEMSET_24	2	/* just memset with 24 bit */
92#define FILL_MEMSET_32	3	/* just memset with 32 bit */
93#define FILL_COUNT_8	4	/* fill with a 8 byte counter */
94#define FILL_COUNT_16	5	/* fill with a 16 bit counter */
95#define FILL_COUNT_24	6	/* fill with a 24 bit counter */
96#define FILL_COUNT_32	7	/* fill with a 32 bit counter */
97#define FILL_TRANSFER_BYTE_8  8	/* fill with the transfer byte - 8 bit */
98#define FILL_TRANSFER_BYTE_16 9	/* fill with the transfer byte - 16 bit */
99#define FILL_TRANSFER_BYTE_24 10 /* fill with the transfer byte - 24 bit */
100#define FILL_TRANSFER_BYTE_32 11 /* fill with the transfer byte - 32 bit */
101#define FILL_TRANSFER_NUM     16 /* fill with the transfer number */
102	u32 fill_pattern;
103	unsigned long long elapsed_time;
104};
105
106/* default implementation for @spi_test.run_test */
107int spi_test_run_test(struct spi_device *spi,
108		      const struct spi_test *test,
109		      void *tx, void *rx);
110
111/* default implementation for @spi_test.execute_msg */
112int spi_test_execute_msg(struct spi_device *spi,
113			 struct spi_test *test,
114			 void *tx, void *rx);
115
116/* function to execute a set of tests */
117int spi_test_run_tests(struct spi_device *spi,
118		       struct spi_test *tests);
119
120#define ITERATE_LEN_LIST 0, 1, 2, 3, 7, 11, 16, 31, 32, 64, 97, 128, 251, 256, \
121		1021, 1024, 1031, 4093, PAGE_SIZE, 4099, 65536, 65537
122/* some of the default @spi_transfer.len to test, terminated by a -1 */
123#define ITERATE_LEN ITERATE_LEN_LIST, -1
124#define ITERATE_MAX_LEN ITERATE_LEN_LIST, (SPI_TEST_MAX_SIZE - 1), \
125		SPI_TEST_MAX_SIZE, -1
126
127/* the default alignment to test */
128#define ITERATE_ALIGN sizeof(int)
129