tests: boards: altera_max10: Add test for Nios-II i2c core

Add test application for Nios-II i2c core on Altera MAX10 board.

This test uses ADV7513 HDMI I2C slave module on Altera MAX10
board to perform i2c read and write operations. For more details
on ADV7513 HDMI module, please refer to the following link.

https://ez.analog.com/docs/DOC-1986

Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>

tests/boards/altera_max10/i2c_master/CMakeLists.txt

@@ -0,0 +1,5 @@
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(NONE)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/boards/altera_max10/i2c_master/README.txt

@@ -0,0 +1,2 @@
+Build test for:
+  Altera Nios-II I2C master soft IP core.

tests/boards/altera_max10/i2c_master/prj.conf

@@ -0,0 +1,8 @@
+CONFIG_I2C=y
+CONFIG_I2C_NIOS2=y
+CONFIG_I2C_INIT_PRIORITY=60
+CONFIG_I2C_0=y
+CONFIG_I2C_0_NAME="I2C_0"
+CONFIG_I2C_0_DEFAULT_CFG=0x0
+CONFIG_I2C_0_IRQ_PRI=10
+CONFIG_ZTEST=y

tests/boards/altera_max10/i2c_master/src/i2c_master.c

@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2018 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <i2c.h>
+#include <zephyr.h>
+#include <ztest.h>
+
+/*
+ * For ADV7513 Programming details, please
+ * refer to the following link.
+ * https://ez.analog.com/docs/DOC-1986
+ */
+
+#define ADV7513_HDMI_I2C_SLAVE_ADDR	0x39
+
+#define ADV7513_CHIP_REVISION_REG	0x0
+#define CHIP_REVISION_VAL		0x13
+
+#define ADV7513_MAIN_POWER_REG		0x41
+#define POWER_ON_VAL			0x10
+
+#define ADV7513_HPD_CTRL_REG		0xD6
+#define HPD_CTRL_VAL			0xC0
+
+#define ADV7513_WRITE_TEST_REG		0x2
+#define WRITE_TEST_VAL			0x66
+
+static int powerup_adv7513(struct device *i2c_dev)
+{
+	u8_t data;
+
+	TC_PRINT("Powering up ADV7513\n");
+	/* write to HPD control registers */
+	if (i2c_reg_write_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				ADV7513_HPD_CTRL_REG, HPD_CTRL_VAL)) {
+		TC_PRINT("i2c write fail\n");
+		return TC_FAIL;
+	}
+	if (i2c_reg_read_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				0xD6, &data)) {
+		TC_PRINT("failed to read HPD control\n");
+		return TC_FAIL;
+	}
+	TC_PRINT("HPD control 0x%x\n", data);
+
+	/* write to power control registers */
+	if (i2c_reg_write_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				ADV7513_MAIN_POWER_REG, POWER_ON_VAL)) {
+		TC_PRINT("i2c write fail\n");
+		return TC_FAIL;
+	}
+
+	if (i2c_reg_read_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				0x41, &data)) {
+		TC_PRINT("failed to read Power state\n");
+		return TC_FAIL;
+	}
+	TC_PRINT("Power state 0x%x\n", data);
+
+	return TC_PASS;
+}
+
+static int test_i2c_adv7513(void)
+{
+	struct device *i2c_dev = device_get_binding(CONFIG_I2C_0_NAME);
+	u32_t i2c_cfg = I2C_SPEED_SET(I2C_SPEED_STANDARD) | I2C_MODE_MASTER;
+	u8_t data;
+
+	if (!i2c_dev) {
+		TC_PRINT("cannot get i2c device\n");
+		return TC_FAIL;
+	}
+
+	/* Test i2c_configure() */
+	if (i2c_configure(i2c_dev, i2c_cfg)) {
+		TC_PRINT("i2c config failed\n");
+		return TC_FAIL;
+	}
+
+	/* Power up ADV7513 */
+	zassert_true(powerup_adv7513(i2c_dev) == TC_PASS,
+					"ADV7513 power up failed");
+
+	TC_PRINT("*** Running i2c read/write tests ***\n");
+	/* Test i2c byte read */
+	data = 0x0;
+	if (i2c_reg_read_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				ADV7513_CHIP_REVISION_REG, &data)) {
+		TC_PRINT("failed to read chip revision\n");
+		return TC_FAIL;
+	}
+	if (data != CHIP_REVISION_VAL) {
+		TC_PRINT("chip revision does not match 0x%x\n", data);
+		return TC_FAIL;
+	}
+	TC_PRINT("i2c read test passed\n");
+
+
+	/* Test i2c byte write */
+	data = WRITE_TEST_VAL;
+	if (i2c_reg_write_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				ADV7513_WRITE_TEST_REG, data)) {
+		TC_PRINT("i2c write fail\n");
+		return TC_FAIL;
+	}
+	data = 0x0;
+	if (i2c_reg_read_byte(i2c_dev, ADV7513_HDMI_I2C_SLAVE_ADDR,
+				ADV7513_WRITE_TEST_REG, &data)) {
+		TC_PRINT("i2c read fail\n");
+		return TC_FAIL;
+	}
+	if (data != WRITE_TEST_VAL) {
+		TC_PRINT("i2c write test failed 0x%x\n", data);
+		return TC_FAIL;
+	}
+	TC_PRINT("i2c write & verify test passed\n");
+
+	return TC_PASS;
+}
+
+void test_i2c_master(void)
+{
+	zassert_true(test_i2c_adv7513() == TC_PASS, NULL);
+}
+
+void test_main(void)
+{
+	ztest_test_suite(nios2_i2c_master_test,
+			 ztest_unit_test(test_i2c_master));
+	ztest_run_test_suite(nios2_i2c_master_test);
+}

tests/boards/altera_max10/i2c_master/testcase.yaml

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+tests:
+  test:
+    platform_whitelist: altera_max10
+    tags: i2c