[PATCH v2 4/5] tests/qtest: add test for K230 watchdog

[Chao Liu <chao.liu@zevorn.cn>]

Testing the Basic Functions of K230 WDT:
1. Reset Function
2. Timeout Check
3. Interrupt Function

Signed-off-by: Mig Yang <temashking@foxmail.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 MAINTAINERS                 |   1 +
 tests/qtest/k230-wdt-test.c | 199 ++++++++++++++++++++++++++++++++++++
 tests/qtest/meson.build     |   3 +-
 3 files changed, 202 insertions(+), 1 deletion(-)
 create mode 100644 tests/qtest/k230-wdt-test.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 758cae99fc..8bdab8fb8a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1717,6 +1717,7 @@ F: hw/riscv/k230.c
 F: hw/watchdog/k230_wdt.c
 F: include/hw/riscv/k230.h
 F: include/hw/watchdog/k230_wdt.h
+F: tests/qtest/k230-wdt-test.c
 
 RX Machines
 -----------
diff --git a/tests/qtest/k230-wdt-test.c b/tests/qtest/k230-wdt-test.c
new file mode 100644
index 0000000000..2550cebd10
--- /dev/null
+++ b/tests/qtest/k230-wdt-test.c
@@ -0,0 +1,199 @@
+/*
+ * QTest testcase for K230 Watchdog
+ *
+ * Copyright (c) 2025 Mig Yang <temashking@foxmail.com>
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * Provides a board compatible with the kendryte K230 SDK
+ *
+ * Documentation: K230_Technical_Reference_Manual_V0.3.1_20241118.pdf
+ *
+ * For more information, see <https://www.kendryte.com/en/proDetail/230>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/timer.h"
+#include "qemu/bitops.h"
+#include "libqtest.h"
+#include "hw/watchdog/k230_wdt.h"
+
+/* K230 WDT0 base address */
+#define K230_WDT0_BASE 0x91106000
+#define K230_WDT1_BASE 0x91106800
+
+/* Test WDT0 by default */
+#define WDT_BASE K230_WDT0_BASE
+
+static void test_register_read_write(void)
+{
+    QTestState *qts = qtest_init("-machine k230");
+
+    /* Test Control Register (CR) read/write */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR, 0xFFFFFFFF);
+    g_assert_cmphex(qtest_readl(qts, WDT_BASE + K230_WDT_CR), ==,
+                    (K230_WDT_CR_RPL_MASK << K230_WDT_CR_RPL_SHIFT) |
+                    K230_WDT_CR_RMOD | K230_WDT_CR_WDT_EN);
+
+    /* Test Timeout Range Register (TORR) read/write */
+    qtest_writel(qts, WDT_BASE + K230_WDT_TORR, 0xFFFFFFFF);
+    g_assert_cmphex(qtest_readl(qts, WDT_BASE + K230_WDT_TORR), ==,
+                    K230_WDT_TORR_TOP_MASK);
+
+    /* Test Protection Level Register read/write */
+    qtest_writel(qts, WDT_BASE + K230_WDT_PROT_LEVEL, 0xFFFFFFFF);
+    g_assert_cmphex(qtest_readl(qts, WDT_BASE + K230_WDT_PROT_LEVEL), ==, 0x7);
+
+    qtest_quit(qts);
+}
+
+static void test_counter_restart(void)
+{
+    QTestState *qts = qtest_init("-machine k230");
+
+    /* Enable watchdog and set timeout */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR, K230_WDT_CR_WDT_EN);
+    qtest_writel(qts, WDT_BASE + K230_WDT_TORR, 0x5); /* TOP = 5 */
+
+    /* Read current counter value */
+    uint32_t initial_count = qtest_readl(qts, WDT_BASE + K230_WDT_CCVR);
+    g_assert_cmpuint(initial_count, >, 0);
+
+    /* Restart counter with magic value */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CRR, K230_WDT_CRR_RESTART);
+
+    /* Wait for time */
+    qtest_clock_step(qts, NANOSECONDS_PER_SECOND * 2);
+
+    /* Counter should be reset to timeout value */
+    uint32_t new_count = qtest_readl(qts, WDT_BASE + K230_WDT_CCVR);
+    g_assert_cmpuint(new_count, >, 0);
+    g_assert_cmpuint(new_count, !=, initial_count);
+
+    qtest_quit(qts);
+}
+
+static void test_interrupt_mode(void)
+{
+    QTestState *qts = qtest_init("-machine k230 --trace k230_*,file=k230.log");
+
+    /* Set interrupt mode and enable watchdog */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR,
+                 K230_WDT_CR_RMOD | K230_WDT_CR_WDT_EN);
+    qtest_writel(qts, WDT_BASE + K230_WDT_TORR, 0x1); /* Short timeout */
+
+    /* Wait for timeout to trigger interrupt */
+    qtest_clock_step(qts, NANOSECONDS_PER_SECOND * 10);
+
+    /* Check interrupt status */
+    uint32_t stat = qtest_readl(qts, WDT_BASE + K230_WDT_STAT);
+    g_assert_cmphex(stat & K230_WDT_STAT_INT, ==, K230_WDT_STAT_INT);
+
+    /* Clear interrupt */
+    qtest_writel(qts, WDT_BASE + K230_WDT_EOI, 0x1);
+    stat = qtest_readl(qts, WDT_BASE + K230_WDT_STAT);
+    g_assert_cmphex(stat & K230_WDT_STAT_INT, ==, 0);
+
+    qtest_quit(qts);
+}
+
+static void test_reset_mode(void)
+{
+    QTestState *qts = qtest_init("-machine k230 -no-reboot");
+
+    /* Set reset mode and enable watchdog */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR, K230_WDT_CR_WDT_EN);
+    qtest_writel(qts, WDT_BASE + K230_WDT_TORR, 0x1); /* Short timeout */
+
+    /* Wait for timeout to trigger reset */
+    qtest_clock_step(qts, NANOSECONDS_PER_SECOND * 2);
+
+    /* In reset mode, the system should reset */
+    /* This test verifies that reset mode is properly configured */
+
+    qtest_quit(qts);
+}
+
+static void test_timeout_calculation(void)
+{
+    QTestState *qts = qtest_init("-machine k230");
+
+    /* Test different timeout values */
+    for (uint32_t top = 0; top <= 15; top++) {
+        qtest_writel(qts, WDT_BASE + K230_WDT_TORR, top);
+        qtest_writel(qts, WDT_BASE + K230_WDT_CR, K230_WDT_CR_WDT_EN);
+
+        /* Read current counter value */
+        uint32_t count = qtest_readl(qts, WDT_BASE + K230_WDT_CCVR);
+        g_assert_cmpuint(count, >, 0);
+
+        /* Disable watchdog for next iteration */
+        qtest_writel(qts, WDT_BASE + K230_WDT_CR, 0);
+    }
+
+    qtest_quit(qts);
+}
+
+static void test_wdt1_registers(void)
+{
+    QTestState *qts = qtest_init("-machine k230");
+
+    /* Test WDT1 registers (second watchdog) */
+    qtest_writel(qts, K230_WDT1_BASE + K230_WDT_CR, 0xFFFFFFFF);
+    g_assert_cmphex(qtest_readl(qts, K230_WDT1_BASE + K230_WDT_CR), ==,
+                    (K230_WDT_CR_RPL_MASK << K230_WDT_CR_RPL_SHIFT) |
+                    K230_WDT_CR_RMOD | K230_WDT_CR_WDT_EN);
+
+    qtest_writel(qts, K230_WDT1_BASE + K230_WDT_TORR, 0xFFFFFFFF);
+    g_assert_cmphex(qtest_readl(qts, K230_WDT1_BASE + K230_WDT_TORR), ==,
+                    K230_WDT_TORR_TOP_MASK);
+
+    qtest_quit(qts);
+}
+
+static void test_enable_disable(void)
+{
+    QTestState *qts = qtest_init("-machine k230");
+
+    /* Initially disabled */
+    uint32_t cr = qtest_readl(qts, WDT_BASE + K230_WDT_CR);
+    g_assert_cmphex(cr & K230_WDT_CR_WDT_EN, ==, 0);
+
+    /* Enable watchdog */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR, K230_WDT_CR_WDT_EN);
+    cr = qtest_readl(qts, WDT_BASE + K230_WDT_CR);
+    g_assert_cmphex(cr & K230_WDT_CR_WDT_EN, ==, K230_WDT_CR_WDT_EN);
+
+    /* Disable watchdog */
+    qtest_writel(qts, WDT_BASE + K230_WDT_CR, 0);
+    cr = qtest_readl(qts, WDT_BASE + K230_WDT_CR);
+    g_assert_cmphex(cr & K230_WDT_CR_WDT_EN, ==, 0);
+
+    qtest_quit(qts);
+}
+
+int main(int argc, char *argv[])
+{
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_func("/k230-wdt/register_read_write", test_register_read_write);
+    qtest_add_func("/k230-wdt/counter_restart", test_counter_restart);
+    qtest_add_func("/k230-wdt/interrupt_mode", test_interrupt_mode);
+    qtest_add_func("/k230-wdt/reset_mode", test_reset_mode);
+    qtest_add_func("/k230-wdt/timeout_calculation", test_timeout_calculation);
+    qtest_add_func("/k230-wdt/wdt1_registers", test_wdt1_registers);
+    qtest_add_func("/k230-wdt/enable_disable", test_enable_disable);
+
+    return g_test_run();
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 669d07c06b..0d9339e938 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -282,7 +282,8 @@ qtests_riscv32 = \
   (config_all_devices.has_key('CONFIG_SIFIVE_E_AON') ? ['sifive-e-aon-watchdog-test'] : [])
 
 qtests_riscv64 = ['riscv-csr-test'] + \
-  (unpack_edk2_blobs ? ['bios-tables-test'] : [])
+  (unpack_edk2_blobs ? ['bios-tables-test'] : []) + \
+  (config_all_devices.has_key('CONFIG_K230') ? ['k230-wdt-test'] : [])
 
 qos_test_ss = ss.source_set()
 qos_test_ss.add(
-- 
2.51.0