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[PATCH 2/3] tests/qtest: add tests for MAX31790 fan controller
From: |
Titus Rwantare |
Subject: |
[PATCH 2/3] tests/qtest: add tests for MAX31790 fan controller |
Date: |
Wed, 12 Jan 2022 00:25:14 +0000 |
Signed-off-by: Titus Rwantare <titusr@google.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
---
tests/qtest/max31790_fan_ctrl-test.c | 171 +++++++++++++++++++++++++++
tests/qtest/meson.build | 1 +
2 files changed, 172 insertions(+)
create mode 100644 tests/qtest/max31790_fan_ctrl-test.c
diff --git a/tests/qtest/max31790_fan_ctrl-test.c
b/tests/qtest/max31790_fan_ctrl-test.c
new file mode 100644
index 0000000000..b0b703d018
--- /dev/null
+++ b/tests/qtest/max31790_fan_ctrl-test.c
@@ -0,0 +1,171 @@
+/*
+ * QTests for MAX31790 Fan controller
+ *
+ * Independently control 6 fans, up to 12 tachometer inputs,
+ * controlled through i2c
+ *
+ * Copyright 2021 Google LLC
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include <math.h>
+#include "hw/sensor/max31790_fan_ctrl.h"
+#include "libqtest-single.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/qmp/qnum.h"
+#include "qemu/bitops.h"
+
+#define TEST_ID "max31790-test"
+#define TEST_ADDR (0x37)
+#define TEST_MAX_RPM 0x4000
+
+static uint16_t qmp_max31790_get(const char *id, const char *property)
+{
+ QDict *response;
+ uint64_t ret;
+
+ response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
+ "'property': %s } }", id, property);
+ g_assert(qdict_haskey(response, "return"));
+ ret = qnum_get_uint(qobject_to(QNum, qdict_get(response, "return")));
+ qobject_unref(response);
+ return ret;
+}
+
+static void qmp_max31790_set(const char *id,
+ const char *property,
+ uint16_t value)
+{
+ QDict *response;
+
+ response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
+ "'property': %s, 'value': %u } }", id, property, value);
+ g_assert(qdict_haskey(response, "return"));
+ qobject_unref(response);
+}
+
+static uint32_t max31790_tach_count2rpm(uint16_t tach, uint8_t sr)
+{
+ if (tach) {
+ return (sr * MAX31790_CLK_FREQ * 60) / (MAX31790_PULSES_PER_REV *
tach);
+ } else {
+ return 0;
+ }
+}
+
+/* R/W Tach - 6 fans */
+static void test_defaults(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QI2CDevice *i2cdev = (QI2CDevice *)obj;
+ uint8_t i2c_value;
+
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_GLOBAL_CONFIG);
+ g_assert_cmphex(i2c_value, ==, MAX31790_GLOBAL_CONFIG_DEFAULT);
+
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_PWM_FREQ);
+ g_assert_cmphex(i2c_value, ==, MAX31790_PWM_FREQ_DEFAULT);
+
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_FAN_DYNAMICS(i));
+ g_assert_cmphex(i2c_value, ==, MAX31790_FAN_DYNAMICS_DEFAULT);
+ }
+
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_FAILED_FAN_OPTS_SEQ_STRT);
+ g_assert_cmphex(i2c_value, ==, MAX31790_FAILED_FAN_OPTS_SEQ_STRT_DEFAULT);
+}
+
+static void test_pwm(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QI2CDevice *i2cdev = (QI2CDevice *)obj;
+ char *path;
+ int err;
+ uint16_t i2c_value, value, rpm;
+
+
+ /* init fans to different pwm duty cycles */
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ path = g_strdup_printf("max_rpm[%d]", i);
+ qmp_max31790_set(TEST_ID, path, TEST_MAX_RPM); /* ~16k RPM */
+ g_free(path);
+ i2c_set8(i2cdev, MAX31790_REG_FAN_CONFIG(i), 0); /* enable PWM mode */
+ path = g_strdup_printf("pwm[%d]", i);
+ qmp_max31790_set(TEST_ID, path, i * 0x40);
+ g_free(path);
+ }
+
+ /* read and compare qmp with i2c 9-bit pwm */
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ path = g_strdup_printf("pwm[%d]", i);
+ value = qmp_max31790_get(TEST_ID, path);
+ g_free(path);
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_PWMOUT_MSB(i)) << 8;
+ i2c_value |= i2c_get8(i2cdev, MAX31790_REG_PWMOUT_LSB(i));
+ i2c_value >>= MAX31790_PWM_SHAMT;
+ g_assert_cmphex(value, ==, i2c_value);
+ }
+
+ /* expect tach to match pwm scaled to max_rpm */
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_TACH_COUNT_MSB(i)) << 8;
+ i2c_value |= i2c_get8(i2cdev, MAX31790_REG_TACH_COUNT_LSB(i));
+ i2c_value >>= 5;
+ value = max31790_tach_count2rpm(i2c_value, MAX31790_SR_DEFAULT);
+ rpm = (TEST_MAX_RPM * i * 0x40) / 0x1FF; /* max_rpm x pwm_duty_cycle */
+ err = value - rpm;
+ g_assert_cmpuint(abs(err), <, 163); /* ~1% of max_rpm */
+ }
+}
+
+static void test_rpm(void *obj, void *data, QGuestAllocator *alloc)
+{
+ QI2CDevice *i2cdev = (QI2CDevice *)obj;
+ char *path;
+ int err;
+ uint16_t i2c_value, value, rpm;
+
+ /* init fans to different speeds */
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ i2c_set8(i2cdev, MAX31790_REG_FAN_CONFIG(i),
+ MAX31790_FAN_CFG_RPM_MODE);
+ path = g_strdup_printf("target_rpm[%d]", i);
+ qmp_max31790_set(TEST_ID, path, i * 1000);
+ g_free(path);
+ }
+
+ /* read and compare qmp with i2c 11-bit tach */
+ for (int i = 0; i < MAX31790_NUM_FANS; i++) {
+ path = g_strdup_printf("target_rpm[%d]", i);
+ value = qmp_max31790_get(TEST_ID, path);
+ g_free(path);
+
+ i2c_value = i2c_get8(i2cdev, MAX31790_REG_TACH_COUNT_MSB(i)) << 8;
+ i2c_value |= i2c_get8(i2cdev, MAX31790_REG_TACH_COUNT_LSB(i));
+ i2c_value >>= MAX31790_TACH_SHAMT;
+
+ rpm = max31790_tach_count2rpm(i2c_value, MAX31790_SR_DEFAULT);
+ err = value - rpm;
+ g_assert_cmpint(abs(err), <, 20); /* 20 RPM */
+ err = (i * 1000) - rpm;
+ g_assert_cmpint(abs(err), <, 20);
+ }
+}
+
+static void max31790_register_nodes(void)
+{
+ QOSGraphEdgeOptions opts = {
+ .extra_device_opts = "id=" TEST_ID ",address=0x37"
+ };
+ add_qi2c_address(&opts, &(QI2CAddress) { TEST_ADDR });
+
+ qos_node_create_driver("max31790", i2c_device_create);
+ qos_node_consumes("max31790", "i2c-bus", &opts);
+
+ qos_add_test("test_defaults", "max31790", test_defaults, NULL);
+ qos_add_test("test_pwm", "max31790", test_pwm, NULL);
+ qos_add_test("test_rpm", "max31790", test_rpm, NULL);
+}
+libqos_init(max31790_register_nodes);
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 37e1eaa449..45694a26ba 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -243,6 +243,7 @@ qos_test_ss.add(
'es1370-test.c',
'ipoctal232-test.c',
'max34451-test.c',
+ 'max31790_fan_ctrl-test.c',
'megasas-test.c',
'ne2000-test.c',
'tulip-test.c',
--
2.34.1.575.g55b058a8bb-goog