tests/mtd_spi_nor: Added new tests

tests/drivers/mtd_spi_nor/Makefile

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+BOARD ?= nrf52840dk
+
+include ../Makefile.drivers_common
+
+USEMODULE += embunit
+USEMODULE += mtd_spi_nor
+
+CFLAGS += -DTHREAD_STACKSIZE_MAIN=4096
+CFLAGS += -DISR_STACKSIZE=2048
+
+include $(RIOTBASE)/Makefile.include

tests/drivers/mtd_spi_nor/Makefile.ci

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+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/mtd_spi_nor/README.md

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+# Test Program for the MTD SPI NOR Flash Driver
+
+This program performs a number of tests with the MTD SPI NOR Flash driver,
+including reading, writing and erasing of the chip.
+
+This test will destroy the data present on the chip!
+
+# Usage
+
+## nRF52830DK
+The test is designed to work with the built-in MX25F6435F flash of the
+Nordic Semiconductor nRF52840DK development board.
+Currently the nRF52840DK Flash definitions do not have the security options enabled.
+
+To run the test you simply have to compile and run the test:
+```
+make flash term
+```
+
+The tests should conclude with "OK (4 tests)".
+
+## nRF52840DK with different flash chips
+
+The default SPI Device for using different Flash chips is SPI(0), which is present on
+the Arduino Uno style headers. The default pin for Chip Select is P1.5. The SPI Device and
+Chip Select pin can be changed with CFLAGS:
+```
+CFLAGS+="-DFLASH_SPI_DEV=1 -DFLASH_SPI_CS='GPIO_PIN(1,5)'" make flash term
+```
+
+The Device under Test can be changed with CFLAGS as well:
+```
+CFLAGS+="-DTEST_MX25F12873F" make flash term
+```
+
+# Tested/Supported Chips
+
+## Macronix
+
+- M25F6435F (built-in on nRF52840DK)
+- M25F12873F

tests/drivers/mtd_spi_nor/flash_dut.c

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+/*
+ * Copyright (C) 2024 Technische Universität Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+/**
+ * @{
+ *
+ * @file
+ * @brief       Definitions for different Flash chips that can be tested
+ *
+ * @author      Christopher Büchse <christopher.buechse@tuhh.de>
+ */
+
+#include "timex.h"
+#include "mtd_spi_nor.h"
+
+#ifdef TEST_MX25L12873F
+
+#define MX25L12873F_PAGE_SIZE           (256)
+#define MX25L12873F_PAGES_PER_SECTOR    (16)
+#define MX25L12873F_SECTOR_COUNT        (4096)
+#define MX25L12873F_FLAGS               (SPI_NOR_F_SECT_4K | SPI_NOR_F_SECT_32K | \
+                                         SPI_NOR_F_SECT_64K | SPI_NOR_F_MX_SECUR)
+#define MX25L12873F_SPI_CLK             SPI_CLK_10MHZ
+#define MX25L12873F_SPI_MODE            SPI_MODE_0
+
+#ifndef FLASH_SPI_CS
+#define FLASH_SPI_CS                    GPIO_PIN(1, 5)
+#endif
+
+#ifndef FLASH_SPI_DEV
+#define FLASH_SPI_DEV                   0
+#endif
+
+static const mtd_spi_nor_params_t _mx25l12873f_flash_nor_params = {
+    .opcode = &mtd_spi_nor_opcode_macronix,
+    .wait_chip_erase = 50LU * US_PER_SEC,
+    .wait_32k_erase = 240LU *US_PER_MS,
+    .wait_sector_erase = 40LU * US_PER_MS,
+    .wait_chip_wake_up = 35LU * US_PER_MS,
+    .clk = MX25L12873F_SPI_CLK,
+    .flag = MX25L12873F_FLAGS,
+    .spi = SPI_DEV(FLASH_SPI_DEV),
+    .mode = MX25L12873F_SPI_MODE,
+    .cs = FLASH_SPI_CS,
+    .wp = GPIO_UNDEF,
+    .hold = GPIO_UNDEF,
+};
+
+static mtd_spi_nor_t _mx25l12873f_nor_dev = {
+    .base = {
+        .driver = &mtd_spi_nor_driver,
+        .page_size = MX25L12873F_PAGE_SIZE,
+        .pages_per_sector = MX25L12873F_PAGES_PER_SECTOR,
+        .sector_count = MX25L12873F_SECTOR_COUNT,
+    },
+    .params = &_mx25l12873f_flash_nor_params,
+};
+
+MTD_XFA_ADD(_mx25l12873f_nor_dev, 10);
+
+#endif /* TEST_MX25L12873F */
+/** @} */

tests/drivers/mtd_spi_nor/main.c

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+/*
+ * Copyright (C) 2024 Technische Universität Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ * @brief       Test for the MTD SPI NOR Driver
+ *
+ * @author      Christopher Büchse <christopher.buechse@tuhh.de>
+ */
+
+#include <string.h>
+#include <errno.h>
+
+#include "busy_wait.h"
+#include "embUnit.h"
+
+#include "mtd_spi_nor.h"
+#include "../../drivers/mtd_spi_nor/include/mtd_spi_nor_defines.h"
+
+#define ENABLE_DEBUG    0
+#include "debug.h"
+
+#define ENABLE_TRACE    0
+#define TRACE(...)      DEBUG(__VA_ARGS__)
+
+#define TEST_MTD mtd_dev_get(MTD_NUMOF-1) // Make sure to get the last device
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static inline spi_t _get_spi(const mtd_spi_nor_t *dev)
+{
+    return dev->params->spi;
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static void mtd_spi_cmd(const mtd_spi_nor_t *dev, uint8_t opcode)
+{
+    if (IS_ACTIVE(TRACE)) {
+        TRACE("mtd_spi_cmd: %p, %02x\n",
+              (void *)dev, (unsigned int)opcode);
+    }
+    spi_transfer_byte(_get_spi(dev), dev->params->cs, false, opcode);
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static void mtd_spi_cmd_read(const mtd_spi_nor_t *dev, uint8_t opcode, void *dest, uint32_t count)
+{
+    if (IS_ACTIVE(TRACE)) {
+        TRACE("mtd_spi_cmd_read: %p, %02x, %p, %" PRIu32 "\n",
+              (void *)dev, (unsigned int)opcode, dest, count);
+    }
+    spi_transfer_regs(_get_spi(dev), dev->params->cs, opcode, NULL, dest, count);
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static void mtd_spi_cmd_write(const mtd_spi_nor_t *dev, uint8_t opcode,
+                              const void *src, uint32_t count)
+{
+    if (IS_ACTIVE(TRACE)) {
+        TRACE("mtd_spi_cmd_write: %p, %02x, %p, %" PRIu32 "\n",
+            (void *)dev, (unsigned int)opcode, src, count);
+    }
+    spi_transfer_regs(_get_spi(dev), dev->params->cs, opcode,
+                      (void *)src, NULL, count);
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static inline void wait_for_write_enable_set(const mtd_spi_nor_t *dev)
+{
+    do {
+        uint8_t status;
+        mtd_spi_cmd_read(dev, dev->params->opcode->rdsr, &status, sizeof(status));
+
+        if (IS_ACTIVE(TRACE)) {
+            TRACE("mtd_spi_nor: wait device status = 0x%02x, waiting WEL-Flag\n",
+                  (unsigned int)status);
+        }
+        if (status & SPI_NOR_STATUS_WEL) {
+            break;
+        }
+        thread_yield();
+    } while (1);
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static void mtd_spi_acquire(const mtd_spi_nor_t *dev)
+{
+    spi_acquire(_get_spi(dev), dev->params->cs,
+                dev->params->mode, dev->params->clk);
+}
+
+// This function was copied from drivers/mtd_spi_nor/mtd_spi_nor.c
+static void mtd_spi_release(const mtd_spi_nor_t *dev)
+{
+    spi_release(_get_spi(dev));
+}
+
+static void setup(void)
+{
+}
+
+static void teardown(void)
+{
+}
+
+static void test_mtd_init(void)
+{
+    DEBUG("test_mtd_init: Initializing the Device\n");
+
+    int ret = mtd_init(TEST_MTD);
+    TEST_ASSERT_EQUAL_INT(0, ret);
+}
+
+static void test_mtd_erase(void)
+{
+    DEBUG("test_mtd_erase: Erasing the first sector\n");
+
+    int ret = mtd_erase(TEST_MTD, 0, TEST_MTD->page_size*TEST_MTD->pages_per_sector);
+    TEST_ASSERT_EQUAL_INT(0, ret);
+}
+
+static void test_mtd_blank(void)
+{
+    return;
+
+    DEBUG("test_mtd_blank: Blank Testing the Device... (this may take a while)\n");
+
+    int ret = 0;
+    uint32_t page_count = TEST_MTD->pages_per_sector * TEST_MTD->sector_count;
+
+    uint8_t buffer[TEST_MTD->page_size];
+
+    for (uint32_t page = 0; page < page_count; page++) {
+        ret = mtd_read_page(TEST_MTD, buffer, page, 0, TEST_MTD->page_size);
+        TEST_ASSERT_EQUAL_INT(0, ret);
+
+        uint8_t sum = 0xFF;
+        for (uint32_t i = 0; i < TEST_MTD->page_size; i++) {
+            sum &= buffer[i];
+        }
+        TEST_ASSERT_EQUAL_INT(0xFF, sum);
+    }
+}
+
+static void test_mtd_block_protect(void)
+{
+    int ret;
+    const char test_data[16] = "BLOCK TEST";
+    const uint8_t bp_flags = SPI_NOR_STATUS_BP0 | SPI_NOR_STATUS_BP1 | \
+                             SPI_NOR_STATUS_BP2 | SPI_NOR_STATUS_BP3;
+
+    uint8_t status_reg;
+    mtd_spi_nor_t *dev = (mtd_spi_nor_t *)TEST_MTD;
+
+    if (!(dev->params->flag & SPI_NOR_F_MX_SECUR || dev->params->flag & SPI_NOR_F_ISSI_SECUR)) {
+        DEBUG("test_mtd_block_protect: No security features enabled, skip test.\n");
+        return;
+    }
+
+    DEBUG("test_mtd_block_protect: Checking the Block Protect Functions\n");
+
+    mtd_spi_acquire(dev);
+
+    // check that the Status Register is Writable
+    mtd_spi_cmd_read(dev, dev->params->opcode->rdsr, &status_reg, sizeof(status_reg));
+    if (status_reg & SPI_NOR_STATUS_SRWD) {
+        status_reg &= !SPI_NOR_STATUS_SRWD;
+    }
+
+    // Mask the status bits
+    status_reg &= !(SPI_NOR_STATUS_WEL | SPI_NOR_STATUS_WIP);
+
+    // Send WREN command to write to the Status Register
+    mtd_spi_cmd(dev, dev->params->opcode->wren);
+    wait_for_write_enable_set(dev);
+
+    // read Status Register again
+    mtd_spi_cmd_read(dev, dev->params->opcode->rdsr, &status_reg, sizeof(status_reg));
+    TEST_ASSERT_EQUAL_INT(0, status_reg & SPI_NOR_STATUS_SRWD);
+    TEST_ASSERT_EQUAL_INT(SPI_NOR_STATUS_WEL, status_reg & SPI_NOR_STATUS_WEL);
+
+    // protect all blocks
+    status_reg |= bp_flags;
+    mtd_spi_cmd_write(dev, 0x01, &status_reg, sizeof(status_reg)); // Opcode WRSR
+
+    busy_wait_us(500);
+
+    // check that the Block Protection was set
+    mtd_spi_cmd_read(dev, dev->params->opcode->rdsr, &status_reg, sizeof(status_reg));
+    TEST_ASSERT_EQUAL_INT(bp_flags, status_reg & bp_flags);
+
+    mtd_spi_cmd(dev, dev->params->opcode->wren);
+    wait_for_write_enable_set(dev);
+    busy_wait_us(50000);
+
+    mtd_spi_release(dev);
+
+    // Perform a write test to check if the P_FAIL flag is correctly handled
+    ret = mtd_write_page_raw(TEST_MTD, test_data, 0x00000000, 0x00, sizeof(test_data));
+    TEST_ASSERT_EQUAL_INT(-EIO, ret);
+
+    // Perform an erase test to check if the E_FAIL flag is correctly handled
+    ret = mtd_erase(TEST_MTD, 0x00000000, dev->base.page_size * dev->base.pages_per_sector);
+    TEST_ASSERT_EQUAL_INT(-EIO, ret);
+
+    // Revert everything back to the original state
+    mtd_spi_acquire(dev);
+
+    // Send WREN command to write to the Status Register
+    mtd_spi_cmd(dev, dev->params->opcode->wren);
+    wait_for_write_enable_set(dev);
+
+    // Mask the status bits and Block Protection Flags
+    status_reg &= !(SPI_NOR_STATUS_WEL | SPI_NOR_STATUS_WIP);
+    status_reg &= !bp_flags;
+
+    mtd_spi_cmd_write(dev, 0x01, &status_reg, sizeof(status_reg)); // Opcode: WRSR
+    mtd_spi_release(dev);
+}
+
+Test *tests_mtd_spi_nor_tests(void)
+{
+    EMB_UNIT_TESTFIXTURES(fixtures) {
+        new_TestFixture(test_mtd_init),
+        new_TestFixture(test_mtd_erase),
+        new_TestFixture(test_mtd_blank),
+
+        new_TestFixture(test_mtd_block_protect),
+    };
+
+    EMB_UNIT_TESTCALLER(mtd_mtd_spi_nor_tests, setup, teardown, fixtures);
+
+    return (Test *)&mtd_mtd_spi_nor_tests;
+}
+
+int main(void)
+{
+    TESTS_START();
+    TESTS_RUN(tests_mtd_spi_nor_tests());
+    TESTS_END();
+    return 0;
+}
+/** @} */