![Colin Ian King](/assets/img/avatar_default.png)
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>
1007 lines
24 KiB
C
1007 lines
24 KiB
C
/*
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* linux/drivers/spi/spi-loopback-test.c
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*
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* (c) Martin Sperl <kernel@martin.sperl.org>
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*
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* Loopback test driver to test several typical spi_message conditions
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* that a spi_master driver may encounter
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* this can also get used for regression testing
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/list_sort.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/printk.h>
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#include <linux/spi/spi.h>
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#include "spi-test.h"
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/* flag to only simulate transfers */
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int simulate_only;
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module_param(simulate_only, int, 0);
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MODULE_PARM_DESC(simulate_only, "if not 0 do not execute the spi message");
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/* dump spi messages */
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int dump_messages;
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module_param(dump_messages, int, 0);
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MODULE_PARM_DESC(dump_messages,
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"=1 dump the basic spi_message_structure, " \
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"=2 dump the spi_message_structure including data, " \
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"=3 dump the spi_message structure before and after execution");
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/* the device is jumpered for loopback - enabling some rx_buf tests */
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int loopback;
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module_param(loopback, int, 0);
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MODULE_PARM_DESC(loopback,
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"if set enable loopback mode, where the rx_buf " \
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"is checked to match tx_buf after the spi_message " \
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"is executed");
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/* run only a specific test */
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int run_only_test = -1;
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module_param(run_only_test, int, 0);
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MODULE_PARM_DESC(run_only_test,
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"only run the test with this number (0-based !)");
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/* the actual tests to execute */
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static struct spi_test spi_tests[] = {
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{
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.description = "tx/rx-transfer - start of page",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_rx_align = ITERATE_ALIGN,
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "tx/rx-transfer - crossing PAGE_SIZE",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_rx_align = ITERATE_ALIGN,
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(PAGE_SIZE - 4),
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.rx_buf = RX(PAGE_SIZE - 4),
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},
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},
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},
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{
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.description = "tx-transfer - only",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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},
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},
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{
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.description = "rx-transfer - only",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_rx_align = ITERATE_ALIGN,
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.transfers = {
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{
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.len = 1,
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "two tx-transfers - alter both",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0) | BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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{
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.len = 1,
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/* this is why we cant use ITERATE_MAX_LEN */
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.tx_buf = TX(SPI_TEST_MAX_SIZE_HALF),
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},
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},
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},
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{
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.description = "two tx-transfers - alter first",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(64),
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},
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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},
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},
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{
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.description = "two tx-transfers - alter second",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0),
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.transfers = {
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{
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.len = 16,
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.tx_buf = TX(0),
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},
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{
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.len = 1,
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.tx_buf = TX(64),
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},
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},
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},
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{
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.description = "two transfers tx then rx - alter both",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0) | BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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{
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.len = 1,
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "two transfers tx then rx - alter tx",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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{
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.len = 1,
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "two transfers tx then rx - alter rx",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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},
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{
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.len = 1,
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "two tx+rx transfers - alter both",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0) | BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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.rx_buf = RX(0),
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},
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{
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.len = 1,
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/* making sure we align without overwrite
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* the reason we can not use ITERATE_MAX_LEN
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*/
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.tx_buf = TX(SPI_TEST_MAX_SIZE_HALF),
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.rx_buf = RX(SPI_TEST_MAX_SIZE_HALF),
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},
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},
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},
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{
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.description = "two tx+rx transfers - alter first",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(0),
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.transfers = {
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{
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.len = 1,
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/* making sure we align without overwrite */
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.tx_buf = TX(1024),
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.rx_buf = RX(1024),
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},
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{
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.len = 1,
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/* making sure we align without overwrite */
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.tx_buf = TX(0),
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.rx_buf = RX(0),
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},
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},
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},
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{
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.description = "two tx+rx transfers - alter second",
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.fill_option = FILL_COUNT_8,
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.iterate_len = { ITERATE_MAX_LEN },
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.iterate_tx_align = ITERATE_ALIGN,
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.iterate_transfer_mask = BIT(1),
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.transfers = {
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{
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.len = 1,
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.tx_buf = TX(0),
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.rx_buf = RX(0),
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},
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{
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.len = 1,
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/* making sure we align without overwrite */
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.tx_buf = TX(1024),
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.rx_buf = RX(1024),
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},
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},
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},
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{ /* end of tests sequence */ }
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};
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static int spi_loopback_test_probe(struct spi_device *spi)
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{
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int ret;
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dev_info(&spi->dev, "Executing spi-loopback-tests\n");
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ret = spi_test_run_tests(spi, spi_tests);
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dev_info(&spi->dev, "Finished spi-loopback-tests with return: %i\n",
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ret);
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return ret;
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}
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/* non const match table to permit to change via a module parameter */
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static struct of_device_id spi_loopback_test_of_match[] = {
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{ .compatible = "linux,spi-loopback-test", },
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{ }
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};
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/* allow to override the compatible string via a module_parameter */
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module_param_string(compatible, spi_loopback_test_of_match[0].compatible,
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sizeof(spi_loopback_test_of_match[0].compatible),
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0000);
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MODULE_DEVICE_TABLE(of, spi_loopback_test_of_match);
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static struct spi_driver spi_loopback_test_driver = {
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.driver = {
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.name = "spi-loopback-test",
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.owner = THIS_MODULE,
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.of_match_table = spi_loopback_test_of_match,
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},
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.probe = spi_loopback_test_probe,
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};
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module_spi_driver(spi_loopback_test_driver);
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MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
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MODULE_DESCRIPTION("test spi_driver to check core functionality");
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MODULE_LICENSE("GPL");
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/*-------------------------------------------------------------------------*/
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/* spi_test implementation */
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#define RANGE_CHECK(ptr, plen, start, slen) \
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((ptr >= start) && (ptr + plen <= start + slen))
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/* we allocate one page more, to allow for offsets */
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#define SPI_TEST_MAX_SIZE_PLUS (SPI_TEST_MAX_SIZE + PAGE_SIZE)
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static void spi_test_print_hex_dump(char *pre, const void *ptr, size_t len)
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{
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/* limit the hex_dump */
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if (len < 1024) {
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print_hex_dump(KERN_INFO, pre,
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DUMP_PREFIX_OFFSET, 16, 1,
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ptr, len, 0);
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return;
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}
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/* print head */
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print_hex_dump(KERN_INFO, pre,
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DUMP_PREFIX_OFFSET, 16, 1,
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ptr, 512, 0);
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/* print tail */
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pr_info("%s truncated - continuing at offset %04zx\n",
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pre, len - 512);
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print_hex_dump(KERN_INFO, pre,
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DUMP_PREFIX_OFFSET, 16, 1,
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ptr + (len - 512), 512, 0);
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}
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static void spi_test_dump_message(struct spi_device *spi,
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struct spi_message *msg,
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bool dump_data)
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{
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struct spi_transfer *xfer;
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int i;
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u8 b;
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dev_info(&spi->dev, " spi_msg@%pK\n", msg);
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if (msg->status)
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dev_info(&spi->dev, " status: %i\n",
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msg->status);
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dev_info(&spi->dev, " frame_length: %i\n",
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msg->frame_length);
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dev_info(&spi->dev, " actual_length: %i\n",
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msg->actual_length);
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list_for_each_entry(xfer, &msg->transfers, transfer_list) {
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dev_info(&spi->dev, " spi_transfer@%pK\n", xfer);
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dev_info(&spi->dev, " len: %i\n", xfer->len);
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dev_info(&spi->dev, " tx_buf: %pK\n", xfer->tx_buf);
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if (dump_data && xfer->tx_buf)
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spi_test_print_hex_dump(" TX: ",
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xfer->tx_buf,
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xfer->len);
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dev_info(&spi->dev, " rx_buf: %pK\n", xfer->rx_buf);
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if (dump_data && xfer->rx_buf)
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spi_test_print_hex_dump(" RX: ",
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xfer->rx_buf,
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xfer->len);
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/* check for unwritten test pattern on rx_buf */
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if (xfer->rx_buf) {
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for (i = 0 ; i < xfer->len ; i++) {
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b = ((u8 *)xfer->rx_buf)[xfer->len - 1 - i];
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if (b != SPI_TEST_PATTERN_UNWRITTEN)
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break;
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}
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if (i)
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dev_info(&spi->dev,
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" rx_buf filled with %02x starts at offset: %i\n",
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SPI_TEST_PATTERN_UNWRITTEN,
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xfer->len - i);
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}
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}
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}
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struct rx_ranges {
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struct list_head list;
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u8 *start;
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u8 *end;
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};
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int rx_ranges_cmp(void *priv, struct list_head *a, struct list_head *b)
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{
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struct rx_ranges *rx_a = list_entry(a, struct rx_ranges, list);
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struct rx_ranges *rx_b = list_entry(b, struct rx_ranges, list);
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if (rx_a->start > rx_b->start)
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return 1;
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if (rx_a->start < rx_b->start)
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return -1;
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return 0;
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}
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static int spi_check_rx_ranges(struct spi_device *spi,
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struct spi_message *msg,
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void *rx)
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{
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struct spi_transfer *xfer;
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struct rx_ranges ranges[SPI_TEST_MAX_TRANSFERS], *r;
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int i = 0;
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LIST_HEAD(ranges_list);
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u8 *addr;
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int ret = 0;
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/* loop over all transfers to fill in the rx_ranges */
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list_for_each_entry(xfer, &msg->transfers, transfer_list) {
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/* if there is no rx, then no check is needed */
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if (!xfer->rx_buf)
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continue;
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/* fill in the rx_range */
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if (RANGE_CHECK(xfer->rx_buf, xfer->len,
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rx, SPI_TEST_MAX_SIZE_PLUS)) {
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ranges[i].start = xfer->rx_buf;
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ranges[i].end = xfer->rx_buf + xfer->len;
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list_add(&ranges[i].list, &ranges_list);
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i++;
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}
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}
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/* if no ranges, then we can return and avoid the checks...*/
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if (!i)
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return 0;
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/* sort the list */
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list_sort(NULL, &ranges_list, rx_ranges_cmp);
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/* and iterate over all the rx addresses */
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for (addr = rx; addr < (u8 *)rx + SPI_TEST_MAX_SIZE_PLUS; addr++) {
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/* if we are the DO not write pattern,
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* then continue with the loop...
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*/
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if (*addr == SPI_TEST_PATTERN_DO_NOT_WRITE)
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continue;
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/* check if we are inside a range */
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list_for_each_entry(r, &ranges_list, list) {
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/* if so then set to end... */
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if ((addr >= r->start) && (addr < r->end))
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addr = r->end;
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}
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/* second test after a (hopefull) translation */
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if (*addr == SPI_TEST_PATTERN_DO_NOT_WRITE)
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continue;
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/* if still not found then something has modified too much */
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/* we could list the "closest" transfer here... */
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dev_err(&spi->dev,
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"loopback strangeness - rx changed outside of allowed range at: %pK\n",
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addr);
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/* do not return, only set ret,
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* so that we list all addresses
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*/
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ret = -ERANGE;
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}
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return ret;
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}
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static int spi_test_check_loopback_result(struct spi_device *spi,
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struct spi_message *msg,
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void *tx, void *rx)
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{
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struct spi_transfer *xfer;
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u8 rxb, txb;
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size_t i;
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int ret;
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/* checks rx_buffer pattern are valid with loopback or without */
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ret = spi_check_rx_ranges(spi, msg, rx);
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if (ret)
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return ret;
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/* if we run without loopback, then return now */
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if (!loopback)
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return 0;
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/* if applicable to transfer check that rx_buf is equal to tx_buf */
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list_for_each_entry(xfer, &msg->transfers, transfer_list) {
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/* if there is no rx, then no check is needed */
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if (!xfer->rx_buf)
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continue;
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/* so depending on tx_buf we need to handle things */
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if (xfer->tx_buf) {
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for (i = 1; i < xfer->len; i++) {
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txb = ((u8 *)xfer->tx_buf)[i];
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rxb = ((u8 *)xfer->rx_buf)[i];
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if (txb != rxb)
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goto mismatch_error;
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}
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} else {
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/* first byte received */
|
|
txb = ((u8 *)xfer->rx_buf)[0];
|
|
/* first byte may be 0 or xff */
|
|
if (!((txb == 0) || (txb == 0xff))) {
|
|
dev_err(&spi->dev,
|
|
"loopback strangeness - we expect 0x00 or 0xff, but not 0x%02x\n",
|
|
txb);
|
|
return -EINVAL;
|
|
}
|
|
/* check that all bytes are identical */
|
|
for (i = 1; i < xfer->len; i++) {
|
|
rxb = ((u8 *)xfer->rx_buf)[i];
|
|
if (rxb != txb)
|
|
goto mismatch_error;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
mismatch_error:
|
|
dev_err(&spi->dev,
|
|
"loopback strangeness - transfer mismatch on byte %04zx - expected 0x%02x, but got 0x%02x\n",
|
|
i, txb, rxb);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int spi_test_translate(struct spi_device *spi,
|
|
void **ptr, size_t len,
|
|
void *tx, void *rx)
|
|
{
|
|
size_t off;
|
|
|
|
/* return on null */
|
|
if (!*ptr)
|
|
return 0;
|
|
|
|
/* in the MAX_SIZE_HALF case modify the pointer */
|
|
if (((size_t)*ptr) & SPI_TEST_MAX_SIZE_HALF)
|
|
/* move the pointer to the correct range */
|
|
*ptr += (SPI_TEST_MAX_SIZE_PLUS / 2) -
|
|
SPI_TEST_MAX_SIZE_HALF;
|
|
|
|
/* RX range
|
|
* - we check against MAX_SIZE_PLUS to allow for automated alignment
|
|
*/
|
|
if (RANGE_CHECK(*ptr, len, RX(0), SPI_TEST_MAX_SIZE_PLUS)) {
|
|
off = *ptr - RX(0);
|
|
*ptr = rx + off;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* TX range */
|
|
if (RANGE_CHECK(*ptr, len, TX(0), SPI_TEST_MAX_SIZE_PLUS)) {
|
|
off = *ptr - TX(0);
|
|
*ptr = tx + off;
|
|
|
|
return 0;
|
|
}
|
|
|
|
dev_err(&spi->dev,
|
|
"PointerRange [%pK:%pK[ not in range [%pK:%pK[ or [%pK:%pK[\n",
|
|
*ptr, *ptr + len,
|
|
RX(0), RX(SPI_TEST_MAX_SIZE),
|
|
TX(0), TX(SPI_TEST_MAX_SIZE));
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int spi_test_fill_pattern(struct spi_device *spi,
|
|
struct spi_test *test)
|
|
{
|
|
struct spi_transfer *xfers = test->transfers;
|
|
u8 *tx_buf;
|
|
size_t count = 0;
|
|
int i, j;
|
|
|
|
#ifdef __BIG_ENDIAN
|
|
#define GET_VALUE_BYTE(value, index, bytes) \
|
|
(value >> (8 * (bytes - 1 - count % bytes)))
|
|
#else
|
|
#define GET_VALUE_BYTE(value, index, bytes) \
|
|
(value >> (8 * (count % bytes)))
|
|
#endif
|
|
|
|
/* fill all transfers with the pattern requested */
|
|
for (i = 0; i < test->transfer_count; i++) {
|
|
/* fill rx_buf with SPI_TEST_PATTERN_UNWRITTEN */
|
|
if (xfers[i].rx_buf)
|
|
memset(xfers[i].rx_buf, SPI_TEST_PATTERN_UNWRITTEN,
|
|
xfers[i].len);
|
|
/* if tx_buf is NULL then skip */
|
|
tx_buf = (u8 *)xfers[i].tx_buf;
|
|
if (!tx_buf)
|
|
continue;
|
|
/* modify all the transfers */
|
|
for (j = 0; j < xfers[i].len; j++, tx_buf++, count++) {
|
|
/* fill tx */
|
|
switch (test->fill_option) {
|
|
case FILL_MEMSET_8:
|
|
*tx_buf = test->fill_pattern;
|
|
break;
|
|
case FILL_MEMSET_16:
|
|
*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
|
|
count, 2);
|
|
break;
|
|
case FILL_MEMSET_24:
|
|
*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
|
|
count, 3);
|
|
break;
|
|
case FILL_MEMSET_32:
|
|
*tx_buf = GET_VALUE_BYTE(test->fill_pattern,
|
|
count, 4);
|
|
break;
|
|
case FILL_COUNT_8:
|
|
*tx_buf = count;
|
|
break;
|
|
case FILL_COUNT_16:
|
|
*tx_buf = GET_VALUE_BYTE(count, count, 2);
|
|
break;
|
|
case FILL_COUNT_24:
|
|
*tx_buf = GET_VALUE_BYTE(count, count, 3);
|
|
break;
|
|
case FILL_COUNT_32:
|
|
*tx_buf = GET_VALUE_BYTE(count, count, 4);
|
|
break;
|
|
case FILL_TRANSFER_BYTE_8:
|
|
*tx_buf = j;
|
|
break;
|
|
case FILL_TRANSFER_BYTE_16:
|
|
*tx_buf = GET_VALUE_BYTE(j, j, 2);
|
|
break;
|
|
case FILL_TRANSFER_BYTE_24:
|
|
*tx_buf = GET_VALUE_BYTE(j, j, 3);
|
|
break;
|
|
case FILL_TRANSFER_BYTE_32:
|
|
*tx_buf = GET_VALUE_BYTE(j, j, 4);
|
|
break;
|
|
case FILL_TRANSFER_NUM:
|
|
*tx_buf = i;
|
|
break;
|
|
default:
|
|
dev_err(&spi->dev,
|
|
"unsupported fill_option: %i\n",
|
|
test->fill_option);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int _spi_test_run_iter(struct spi_device *spi,
|
|
struct spi_test *test,
|
|
void *tx, void *rx)
|
|
{
|
|
struct spi_message *msg = &test->msg;
|
|
struct spi_transfer *x;
|
|
int i, ret;
|
|
|
|
/* initialize message - zero-filled via static initialization */
|
|
spi_message_init_no_memset(msg);
|
|
|
|
/* fill rx with the DO_NOT_WRITE pattern */
|
|
memset(rx, SPI_TEST_PATTERN_DO_NOT_WRITE, SPI_TEST_MAX_SIZE_PLUS);
|
|
|
|
/* add the individual transfers */
|
|
for (i = 0; i < test->transfer_count; i++) {
|
|
x = &test->transfers[i];
|
|
|
|
/* patch the values of tx_buf */
|
|
ret = spi_test_translate(spi, (void **)&x->tx_buf, x->len,
|
|
(void *)tx, rx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* patch the values of rx_buf */
|
|
ret = spi_test_translate(spi, &x->rx_buf, x->len,
|
|
(void *)tx, rx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* and add it to the list */
|
|
spi_message_add_tail(x, msg);
|
|
}
|
|
|
|
/* fill in the transfer buffers with pattern */
|
|
ret = spi_test_fill_pattern(spi, test);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* and execute */
|
|
if (test->execute_msg)
|
|
ret = test->execute_msg(spi, test, tx, rx);
|
|
else
|
|
ret = spi_test_execute_msg(spi, test, tx, rx);
|
|
|
|
/* handle result */
|
|
if (ret == test->expected_return)
|
|
return 0;
|
|
|
|
dev_err(&spi->dev,
|
|
"test failed - test returned %i, but we expect %i\n",
|
|
ret, test->expected_return);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* if it is 0, as we expected something else,
|
|
* then return something special
|
|
*/
|
|
return -EFAULT;
|
|
}
|
|
|
|
static int spi_test_run_iter(struct spi_device *spi,
|
|
const struct spi_test *testtemplate,
|
|
void *tx, void *rx,
|
|
size_t len,
|
|
size_t tx_off,
|
|
size_t rx_off
|
|
)
|
|
{
|
|
struct spi_test test;
|
|
int i, tx_count, rx_count;
|
|
|
|
/* copy the test template to test */
|
|
memcpy(&test, testtemplate, sizeof(test));
|
|
|
|
/* set up test->transfers to the correct count */
|
|
if (!test.transfer_count) {
|
|
for (i = 0;
|
|
(i < SPI_TEST_MAX_TRANSFERS) && test.transfers[i].len;
|
|
i++) {
|
|
test.transfer_count++;
|
|
}
|
|
}
|
|
|
|
/* if iterate_transfer_mask is not set,
|
|
* then set it to first transfer only
|
|
*/
|
|
if (!(test.iterate_transfer_mask & (BIT(test.transfer_count) - 1)))
|
|
test.iterate_transfer_mask = 1;
|
|
|
|
/* count number of transfers with tx/rx_buf != NULL */
|
|
rx_count = tx_count = 0;
|
|
for (i = 0; i < test.transfer_count; i++) {
|
|
if (test.transfers[i].tx_buf)
|
|
tx_count++;
|
|
if (test.transfers[i].rx_buf)
|
|
rx_count++;
|
|
}
|
|
|
|
/* in some iteration cases warn and exit early,
|
|
* as there is nothing to do, that has not been tested already...
|
|
*/
|
|
if (tx_off && (!tx_count)) {
|
|
dev_warn_once(&spi->dev,
|
|
"%s: iterate_tx_off configured with tx_buf==NULL - ignoring\n",
|
|
test.description);
|
|
return 0;
|
|
}
|
|
if (rx_off && (!rx_count)) {
|
|
dev_warn_once(&spi->dev,
|
|
"%s: iterate_rx_off configured with rx_buf==NULL - ignoring\n",
|
|
test.description);
|
|
return 0;
|
|
}
|
|
|
|
/* write out info */
|
|
if (!(len || tx_off || rx_off)) {
|
|
dev_info(&spi->dev, "Running test %s\n", test.description);
|
|
} else {
|
|
dev_info(&spi->dev,
|
|
" with iteration values: len = %zu, tx_off = %zu, rx_off = %zu\n",
|
|
len, tx_off, rx_off);
|
|
}
|
|
|
|
/* update in the values from iteration values */
|
|
for (i = 0; i < test.transfer_count; i++) {
|
|
/* only when bit in transfer mask is set */
|
|
if (!(test.iterate_transfer_mask & BIT(i)))
|
|
continue;
|
|
if (len)
|
|
test.transfers[i].len = len;
|
|
if (test.transfers[i].tx_buf)
|
|
test.transfers[i].tx_buf += tx_off;
|
|
if (test.transfers[i].tx_buf)
|
|
test.transfers[i].rx_buf += rx_off;
|
|
}
|
|
|
|
/* and execute */
|
|
return _spi_test_run_iter(spi, &test, tx, rx);
|
|
}
|
|
|
|
/**
|
|
* spi_test_execute_msg - default implementation to run a test
|
|
*
|
|
* spi: @spi_device on which to run the @spi_message
|
|
* test: the test to execute, which already contains @msg
|
|
* tx: the tx buffer allocated for the test sequence
|
|
* rx: the rx buffer allocated for the test sequence
|
|
*
|
|
* Returns: error code of spi_sync as well as basic error checking
|
|
*/
|
|
int spi_test_execute_msg(struct spi_device *spi, struct spi_test *test,
|
|
void *tx, void *rx)
|
|
{
|
|
struct spi_message *msg = &test->msg;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
/* only if we do not simulate */
|
|
if (!simulate_only) {
|
|
/* dump the complete message before and after the transfer */
|
|
if (dump_messages == 3)
|
|
spi_test_dump_message(spi, msg, true);
|
|
|
|
/* run spi message */
|
|
ret = spi_sync(spi, msg);
|
|
if (ret == -ETIMEDOUT) {
|
|
dev_info(&spi->dev,
|
|
"spi-message timed out - reruning...\n");
|
|
/* rerun after a few explicit schedules */
|
|
for (i = 0; i < 16; i++)
|
|
schedule();
|
|
ret = spi_sync(spi, msg);
|
|
}
|
|
if (ret) {
|
|
dev_err(&spi->dev,
|
|
"Failed to execute spi_message: %i\n",
|
|
ret);
|
|
goto exit;
|
|
}
|
|
|
|
/* do some extra error checks */
|
|
if (msg->frame_length != msg->actual_length) {
|
|
dev_err(&spi->dev,
|
|
"actual length differs from expected\n");
|
|
ret = -EIO;
|
|
goto exit;
|
|
}
|
|
|
|
/* run rx-buffer tests */
|
|
ret = spi_test_check_loopback_result(spi, msg, tx, rx);
|
|
}
|
|
|
|
/* if requested or on error dump message (including data) */
|
|
exit:
|
|
if (dump_messages || ret)
|
|
spi_test_dump_message(spi, msg,
|
|
(dump_messages >= 2) || (ret));
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spi_test_execute_msg);
|
|
|
|
/**
|
|
* spi_test_run_test - run an individual spi_test
|
|
* including all the relevant iterations on:
|
|
* length and buffer alignment
|
|
*
|
|
* spi: the spi_device to send the messages to
|
|
* test: the test which we need to execute
|
|
* tx: the tx buffer allocated for the test sequence
|
|
* rx: the rx buffer allocated for the test sequence
|
|
*
|
|
* Returns: status code of spi_sync or other failures
|
|
*/
|
|
|
|
int spi_test_run_test(struct spi_device *spi, const struct spi_test *test,
|
|
void *tx, void *rx)
|
|
{
|
|
int idx_len;
|
|
size_t len;
|
|
size_t tx_align, rx_align;
|
|
int ret;
|
|
|
|
/* test for transfer limits */
|
|
if (test->transfer_count >= SPI_TEST_MAX_TRANSFERS) {
|
|
dev_err(&spi->dev,
|
|
"%s: Exceeded max number of transfers with %i\n",
|
|
test->description, test->transfer_count);
|
|
return -E2BIG;
|
|
}
|
|
|
|
/* setting up some values in spi_message
|
|
* based on some settings in spi_master
|
|
* some of this can also get done in the run() method
|
|
*/
|
|
|
|
/* iterate over all the iterable values using macros
|
|
* (to make it a bit more readable...
|
|
*/
|
|
#define FOR_EACH_ITERATE(var, defaultvalue) \
|
|
for (idx_##var = -1, var = defaultvalue; \
|
|
((idx_##var < 0) || \
|
|
( \
|
|
(idx_##var < SPI_TEST_MAX_ITERATE) && \
|
|
(var = test->iterate_##var[idx_##var]) \
|
|
) \
|
|
); \
|
|
idx_##var++)
|
|
#define FOR_EACH_ALIGNMENT(var) \
|
|
for (var = 0; \
|
|
var < (test->iterate_##var ? \
|
|
(spi->master->dma_alignment ? \
|
|
spi->master->dma_alignment : \
|
|
test->iterate_##var) : \
|
|
1); \
|
|
var++)
|
|
|
|
FOR_EACH_ITERATE(len, 0) {
|
|
FOR_EACH_ALIGNMENT(tx_align) {
|
|
FOR_EACH_ALIGNMENT(rx_align) {
|
|
/* and run the iteration */
|
|
ret = spi_test_run_iter(spi, test,
|
|
tx, rx,
|
|
len,
|
|
tx_align,
|
|
rx_align);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spi_test_run_test);
|
|
|
|
/**
|
|
* spi_test_run_tests - run an array of spi_messages tests
|
|
* @spi: the spi device on which to run the tests
|
|
* @tests: NULL-terminated array of @spi_test
|
|
*
|
|
* Returns: status errors as per @spi_test_run_test()
|
|
*/
|
|
|
|
int spi_test_run_tests(struct spi_device *spi,
|
|
struct spi_test *tests)
|
|
{
|
|
char *rx = NULL, *tx = NULL;
|
|
int ret = 0, count = 0;
|
|
struct spi_test *test;
|
|
|
|
/* allocate rx/tx buffers of 128kB size without devm
|
|
* in the hope that is on a page boundary
|
|
*/
|
|
rx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL);
|
|
if (!rx) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
tx = kzalloc(SPI_TEST_MAX_SIZE_PLUS, GFP_KERNEL);
|
|
if (!tx) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* now run the individual tests in the table */
|
|
for (test = tests, count = 0; test->description[0];
|
|
test++, count++) {
|
|
/* only run test if requested */
|
|
if ((run_only_test > -1) && (count != run_only_test))
|
|
continue;
|
|
/* run custom implementation */
|
|
if (test->run_test)
|
|
ret = test->run_test(spi, test, tx, rx);
|
|
else
|
|
ret = spi_test_run_test(spi, test, tx, rx);
|
|
if (ret)
|
|
goto out;
|
|
/* add some delays so that we can easily
|
|
* detect the individual tests when using a logic analyzer
|
|
* we also add scheduling to avoid potential spi_timeouts...
|
|
*/
|
|
mdelay(100);
|
|
schedule();
|
|
}
|
|
|
|
out:
|
|
kfree(rx);
|
|
kfree(tx);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spi_test_run_tests);
|