tests: add zephyr SPI driver api test case

This commit verifies the below SPI driver apis:
	spi_configure()
	spi_slave_select()
	spi_write()
	spi_transceive()

Verify SPI work in SPI_MODE_CPOL, SPI_MODE_CPHA,
and SPI_MODE_CPOL | SPI_MODE_CPHA.

Jira: ZEP-1626

Change-Id: I1985ac6ff8269ac908817644a844720f2d7a125c
Signed-off-by: Qiu Peiyang <[email protected]>
Signed-off-by: Sergio Rodriguez <[email protected]>
(cherry picked from commit 1124da1)

Author: QiuPeiyang

tests/drivers/spi_test/Makefile renamed to tests/drivers/spi/spi_basic_api/Makefile

@@ -0,0 +1,2 @@
+CONFIG_SPI=y
+CONFIG_ZTEST=y

tests/drivers/spi/spi_basic_api/prj.conf

@@ -0,0 +1,3 @@
+include $(ZEPHYR_BASE)/tests/Makefile.test
+
+obj-y += main.o test_spi.o

tests/drivers/spi/spi_basic_api/src/Makefile

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @addtogroup t_driver_spi
+ * @{
+ * @defgroup t_spi_basic test_spi_basic_operations
+ * @}
+ *
+ * Setup: Connect DUT MISO to DUT MOSI
+ *
+ * quark_se_c1000_devboard - x86
+ * ----------------------
+ *
+ * SPI_0_MISO - SPI_0_MOSI
+ * SPI_1_MISO - SPI_1_MOSI
+ *
+ * quark_se_c1000_ss_devboard - arc
+ * ----------------------
+ *
+ * SPI_SS_0_MISO - SPI_SS_0_MOSI
+ * SPI_SS_1_MISO - SPI_SS_1_MOSI
+ *
+ * quark_d2000 - x86
+ * ----------------------
+ *
+ * SPI_M_MISO - SPI_M_MOSI
+ *
+ * arduino_101 - x86
+ * ----------------------
+ *
+ * SPI1_M_MISO - SPI1_M_MOSI
+ */
+
+#include <zephyr.h>
+#include <ztest.h>
+
+void test_spi_cpol(void);
+void test_spi_cpha(void);
+void test_spi_cpol_cpha(void);
+
+void test_main(void)
+{
+	ztest_test_suite(spi_test,
+			 ztest_unit_test(test_spi_cpol),
+			 ztest_unit_test(test_spi_cpha),
+			 ztest_unit_test(test_spi_cpol_cpha));
+	ztest_run_test_suite(spi_test);
+}

tests/drivers/spi/spi_basic_api/src/main.c

@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * @addtogroup t_spi_basic
+ * @{
+ * @defgroup t_spi_basic_operations test_spi_basic_operation_mode
+ * @brief TestPurpose: verify SPI basic operations in different mode
+ * @}
+ */
+
+#include <spi.h>
+#include <zephyr.h>
+#include <ztest.h>
+
+#ifdef CONFIG_ARC
+#define SPI_DEV_NAME CONFIG_SPI_SS_0_NAME
+#else
+#ifdef CONFIG_BOARD_ARDUINO_101
+#define SPI_DEV_NAME CONFIG_SPI_1_NAME
+#else
+#define SPI_DEV_NAME CONFIG_SPI_0_NAME
+#endif
+#endif
+
+#define SPI_SLAVE 1
+#define SPI_MAX_CLK_FREQ_250KHZ 128
+
+static struct spi_config spi_conf = {
+	.config = SPI_MODE_CPOL | SPI_MODE_CPHA | SPI_WORD(8),
+	.max_sys_freq = SPI_MAX_CLK_FREQ_250KHZ,
+};
+
+static unsigned char wbuf[16] = "Hello";
+static unsigned char rbuf[16] = {};
+
+static int test_spi(uint32_t mode)
+{
+	struct device *spi_dev = device_get_binding(SPI_DEV_NAME);
+	uint32_t len = strlen(wbuf);
+
+	if (!spi_dev) {
+		TC_PRINT("Cannot get SPI device\n");
+		return TC_FAIL;
+	}
+
+	spi_conf.config = mode | SPI_MODE_LOOP;
+	/* 1. verify spi_configure() */
+	if (spi_configure(spi_dev, &spi_conf)) {
+		TC_PRINT("SPI config failed\n");
+		return TC_FAIL;
+	}
+
+	/* 2. verify spi_slave_select() */
+	if (spi_slave_select(spi_dev, SPI_SLAVE)) {
+		TC_PRINT("SPI slave select failed\n");
+		return TC_FAIL;
+	}
+
+	/* 3. verify spi_write() */
+	if (spi_write(spi_dev, (uint8_t *) wbuf, 6) != 0) {
+		TC_PRINT("SPI write failed\n");
+		return TC_FAIL;
+	}
+
+	strcpy((char *)wbuf, "So what then?");
+	len = strlen(wbuf);
+
+	/* 4. verify spi_transceive() */
+	TC_PRINT("SPI sent: %s\n", wbuf);
+	if (spi_transceive(spi_dev, wbuf, len + 1, rbuf, len + 1) != 0) {
+		TC_PRINT("SPI transceive failed\n");
+		return TC_FAIL;
+	}
+
+	TC_PRINT("SPI transceived: %s\n", rbuf);
+
+	if (!strcmp(wbuf, rbuf)) {
+		return TC_PASS;
+	} else {
+		return TC_FAIL;
+	}
+}
+
+void test_spi_cpol(void)
+{
+	TC_PRINT("Test SPI_MODE_CPOL\n");
+	assert_true(test_spi(SPI_WORD(8) | SPI_MODE_CPOL) == TC_PASS, NULL);
+}
+
+void test_spi_cpha(void)
+{
+	TC_PRINT("Test SPI_MODE_CPHA\n");
+	assert_true(test_spi(SPI_WORD(8) | SPI_MODE_CPHA) == TC_PASS, NULL);
+}
+
+void test_spi_cpol_cpha(void)
+{
+	TC_PRINT("Test SPI_MODE_CPOL | SPI_MODE_CPHA\n");
+	assert_true(test_spi(SPI_WORD(8) | SPI_MODE_CPOL | SPI_MODE_CPHA)
+					== TC_PASS, NULL);
+}

tests/drivers/spi/spi_basic_api/src/test_spi.c

@@ -0,0 +1,5 @@
+[test_spi]
+tags = apps
+arch_whitelist = x86 arc arm
+platform_whitelist = quark_se_c1000_devboard quark_d2000_crb arduino_101 galileo frdm_k64f
+platform_exclude = arduino_101_sss