[serial] add bypass testcase in utest

components/drivers/include/rtdevice.h

@@ -91,7 +91,7 @@ extern "C" {
 #else
 #include "drivers/dev_serial.h"
 #ifdef RT_USING_SERIAL_BYPASS
-#include "drivers/bypass.h"
+#include "drivers/serial_bypass.h"
 #endif /* RT_USING_SERIAL_BYPASS */
 #endif
 #endif /* RT_USING_SERIAL */

components/drivers/serial/Kconfig

@@ -23,5 +23,5 @@ menuconfig RT_USING_SERIAL
             default 64
         config RT_USING_SERIAL_BYPASS
             bool "Using serial bypass"
-            default y
+            default n
         endif

components/drivers/serial/dev_serial.c

@@ -1428,7 +1428,6 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
 
             while (1)
             {
-                rt_bool_t skip = RT_FALSE;
                 ch = serial->ops->getc(serial);
                 if (ch == -1) break;
 
@@ -1436,6 +1435,7 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
 #ifdef RT_USING_SERIAL_BYPASS
                 if (serial->bypass && serial->bypass->upper_h && (serial->bypass->upper_h->head.next != &serial->bypass->upper_h->head))
                 {
+                    rt_bool_t skip = RT_FALSE;
                     char buf = (char)ch;
                     int ret;
                     rt_list_t* node = serial->bypass->upper_h->head.next;
@@ -1449,10 +1449,11 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
                         }
                         node = node->next;
                     } while (node != &serial->bypass->upper_h->head);
+
+                    if (skip)
+                        continue;
                 }
 
-                if (skip)
-                    continue;
 #endif
                 level = rt_spin_lock_irqsave(&(serial->spinlock));
                 rx_fifo->buffer[rx_fifo->put_index] = ch;
@@ -1478,17 +1479,7 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
                 rt_workqueue_dowork(serial->bypass->lower_workq, &serial->bypass->work);
 #endif
 
-            /**
+            if (serial->parent.rx_indicate != RT_NULL)
-             * Invoke callback.
-             * First try notify if any, and if notify is existed, rx_indicate()
-             * is not callback. This separate the priority and makes the reuse
-             * of same serial device reasonable for RT console.
-             */
-            if (serial->rx_notify.notify)
-            {
-                serial->rx_notify.notify(serial->rx_notify.dev);
-            }
-            else if (serial->parent.rx_indicate != RT_NULL)
             {
                 rt_size_t rx_length;
 

components/drivers/serial/serial_tty.c

@@ -114,47 +114,6 @@ static void _setup_debug_rxind_hook(void)
 
 #endif /* LWP_DEBUG_INIT */
 
-static void _tty_rx_notify(struct rt_device *device)
-{
-    lwp_tty_t tp;
-    struct serial_tty_context *softc;
-
-    tp = rt_container_of(device, struct lwp_tty, parent);
-    RT_ASSERT(tp);
-
-    softc = tty_softc(tp);
-
-    if (_ttyworkq)
-        rt_workqueue_submit_work(_ttyworkq, &softc->work, 0);
-}
-
-static void _tty_rx_worker(struct rt_work *work, void *data)
-{
-    char input;
-    rt_ssize_t readbytes;
-    lwp_tty_t tp = data;
-    struct serial_tty_context *softc;
-    struct rt_serial_device *serial;
-
-    tty_lock(tp);
-
-    while (1)
-    {
-        softc = tty_softc(tp);
-        serial = softc->parent;
-        readbytes = rt_device_read(&serial->parent, -1, &input, 1);
-        if (readbytes != 1)
-        {
-            break;
-        }
-
-        ttydisc_rint(tp, input, 0);
-    }
-
-    ttydisc_rint_done(tp);
-    tty_unlock(tp);
-}
-#ifdef RT_USING_SERIAL_BYPASS
 static rt_err_t _serial_ty_bypass(struct rt_serial_device* serial, char ch,void *data)
 {
     lwp_tty_t tp;
@@ -168,23 +127,11 @@ static rt_err_t _serial_ty_bypass(struct rt_serial_device* serial, char ch,void
     return RT_EOK;
 
 }
-#endif
+
 rt_inline void _setup_serial(struct rt_serial_device* serial, lwp_tty_t tp,
                              struct serial_tty_context *softc)
 {
-#ifndef RT_USING_SERIAL_BYPASS
-    struct rt_device_notify notify;
-
-    softc->backup_notify = serial->rx_notify;
-    notify.dev = &tp->parent;
-    notify.notify = _tty_rx_notify;
-
-    rt_device_init(&serial->parent);
-
-    rt_device_control(&serial->parent, RT_DEVICE_CTRL_NOTIFY_SET, &notify);
-#else
     rt_bypass_lower_register(serial, "tty",RT_BYPASS_PROTECT_LEVEL_1, _serial_ty_bypass,(void *)tp);
-#endif
 }
 
 rt_inline void _restore_serial(struct rt_serial_device *serial, lwp_tty_t tp,
@@ -363,7 +310,6 @@ rt_err_t rt_hw_serial_register_tty(struct rt_serial_device *serial)
             {
                 _serial_tty_set_speed(tty);
                 rc = lwp_tty_register(tty, dev_name);
-                rt_work_init(&softc->work, _tty_rx_worker, tty);
 
                 if (rc != RT_EOK)
                 {

components/lwp/terminal/Kconfig

@@ -2,6 +2,7 @@ menuconfig LWP_USING_TERMINAL
     bool "Terminal I/O Subsystem"
     depends on RT_USING_SMART
     default y
+    select RT_USING_SERIAL_BYPASS
 
 if LWP_USING_TERMINAL
     config LWP_PTY_MAX_PARIS_LIMIT

examples/utest/testcases/Kconfig

@@ -11,6 +11,7 @@ rsource "utest/Kconfig"
 rsource "kernel/Kconfig"
 rsource "cpp11/Kconfig"
 rsource "drivers/serial_v2/Kconfig"
+rsource "drivers/serial_bypass/Kconfig"
 rsource "drivers/ipc/Kconfig"
 rsource "posix/Kconfig"
 rsource "mm/Kconfig"

examples/utest/testcases/drivers/serial_bypass/Kconfig

@@ -0,0 +1,7 @@
+menu "Serial-Bypass Testcase"
+
+config UTEST_SERIAL_BYPASS
+    bool "Serial testcase"
+    default n
+
+endmenu

examples/utest/testcases/drivers/serial_bypass/SConscript

@@ -0,0 +1,11 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('bypass*.c')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('utestcases', src, depend = ['UTEST_SERIAL_BYPASS'], CPPPATH = CPPPATH)
+
+Return('group')

examples/utest/testcases/drivers/serial_bypass/bypass_conflict.c

@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-20     zhujiale     the first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+static struct rt_serial_device* _serial0;
+static struct rt_spinlock lock;
+static int cnt = 0;
+
+#define __REG32(x) (*((volatile unsigned int*)((rt_ubase_t)x)))
+#define UART_FR(base)   __REG32(base + 0x18)
+#define UART_DR(base)   __REG32(base + 0x00)
+#define UARTFR_TXFF     0x20
+
+static rt_err_t utest_get_c(struct rt_serial_device* serial, char ch, void* data)
+{
+    rt_atomic_add(&cnt, 1);
+    return RT_EOK;
+}
+
+static int utest_getc(struct rt_serial_device* serial)
+{
+    static int num = 0;
+
+    rt_spin_lock(&lock);
+    if (rt_atomic_load(&num) == 10)
+    {
+        rt_atomic_flag_clear(&num);
+        rt_spin_unlock(&lock);
+        return -1;
+    }
+    rt_atomic_add(&num, 1);
+    rt_spin_unlock(&lock);
+    return 'a';
+}
+
+struct hw_uart_device
+{
+    rt_size_t hw_base;
+    rt_size_t irqno;
+};
+
+static int uart_putc(struct rt_serial_device* serial, char c)
+{
+    struct hw_uart_device* uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device*)serial->parent.user_data;
+
+    while (UART_FR(uart->hw_base) & UARTFR_TXFF);
+    UART_DR(uart->hw_base) = c;
+
+    return 1;
+}
+
+static const struct rt_uart_ops _utest_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    uart_putc,
+    utest_getc,
+};
+
+
+static void thread_rx1(void* parameter)
+{
+    for (int i = 0; i < 10; i++)
+    {
+        rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    }
+}
+
+static void thread_rx2(void* parameter)
+{
+    for (int i = 0; i < 10; i++)
+    {
+        rt_workqueue_dowork(_serial0->bypass->lower_workq, &_serial0->bypass->work);
+    }
+}
+
+static void thread_high_priority(void* parameter)
+{
+    for (int i = 1; i < 10; i++)
+    {
+        rt_bypass_upper_register(_serial0, "test", i, utest_get_c, RT_NULL);
+        rt_bypass_upper_unregister(_serial0, i);
+    }
+}
+
+static void thread_low_priority(void* parameter)
+{
+    for (int i = 0; i < 20; i++)
+    {
+        rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    }
+}
+
+static void bypass_rx_stress_003(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+
+    rt_thread_t high = rt_thread_create("high_prio", thread_high_priority, RT_NULL, 2048, 15, 10);
+    rt_thread_t low = rt_thread_create("low_prio", thread_low_priority, RT_NULL, 2048, 20, 10);
+
+    rt_atomic_flag_clear(&cnt);
+    _serial0->ops = &_utest_ops;
+    rt_bypass_upper_register(_serial0, "test", 0, utest_get_c, RT_NULL);
+
+    rt_thread_startup(high);
+    rt_thread_startup(low);
+
+    rt_thread_mdelay(1000);
+    _serial0->ops = tmp;
+    rt_bypass_upper_unregister(_serial0, 0);
+    uassert_true(rt_atomic_load(&cnt) == 200);
+}
+
+static void bypass_rx_stress_002(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    rt_thread_t rx2 = rt_thread_create("rx2", thread_rx1, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+    rt_thread_t rx3 = rt_thread_create("rx3", thread_rx2, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+
+    rt_atomic_flag_clear(&cnt);
+    _serial0->ops = &_utest_ops;
+    rt_bypass_lower_register(_serial0, "utest", 0, utest_get_c, RT_NULL);
+
+    rt_thread_startup(rx2);
+    rt_thread_startup(rx3);
+
+    rt_thread_mdelay(1000);
+
+    uassert_true(rt_atomic_load(&cnt) == 100);
+    _serial0->ops = tmp;
+    rt_bypass_lower_unregister(_serial0, 0);
+}
+
+static void bypass_rx_stress_001(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    rt_thread_t rx1 = rt_thread_create("rx1", thread_rx1, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+    rt_thread_t rx2 = rt_thread_create("rx1", thread_rx1, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+
+    cnt = 0;
+    _serial0->ops = &_utest_ops;
+    rt_bypass_upper_register(_serial0, "utest", 0, utest_get_c, RT_NULL);
+
+    rt_thread_startup(rx1);
+    rt_thread_startup(rx2);
+
+    rt_thread_mdelay(1000);
+
+    uassert_true(rt_atomic_load(&cnt) == 200);
+    _serial0->ops = tmp;
+    rt_bypass_upper_unregister(_serial0, 0);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    _serial0 = (struct rt_serial_device*)rt_console_get_device();
+    rt_spin_lock_init(&lock);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void _testcase(void)
+{
+    UTEST_UNIT_RUN(bypass_rx_stress_001);
+    UTEST_UNIT_RUN(bypass_rx_stress_002);
+    UTEST_UNIT_RUN(bypass_rx_stress_003);
+}
+
+UTEST_TC_EXPORT(_testcase, "testcase.bypass.conflict.001", utest_tc_init, utest_tc_cleanup, 10);

examples/utest/testcases/drivers/serial_bypass/bypass_lower_run.c

@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-20     zhujiale     the first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+static struct rt_serial_device* _serial0;
+static int cnt = 0;
+
+#define __REG32(x) (*((volatile unsigned int*)((rt_ubase_t)x)))
+#define UART_FR(base)   __REG32(base + 0x18)
+#define UART_DR(base)   __REG32(base + 0x00)
+#define UARTFR_TXFF     0x20
+
+struct hw_uart_device
+{
+    rt_size_t hw_base;
+    rt_size_t irqno;
+};
+
+static int uart_putc(struct rt_serial_device* serial, char c)
+{
+    struct hw_uart_device* uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device*)serial->parent.user_data;
+
+    while (UART_FR(uart->hw_base) & UARTFR_TXFF);
+    UART_DR(uart->hw_base) = c;
+
+    return 1;
+}
+
+static rt_err_t utest_lower_run_test2(struct rt_serial_device* serial, char ch, void* data)
+{
+    static rt_uint8_t num = 0;
+    num++;
+    uassert_true(ch == ('a' + num));
+    return RT_EOK;
+}
+
+static int utest_getc_2(struct rt_serial_device* serial)
+{
+    static rt_uint8_t num = 0;
+    if (num == 20)
+        return -1;
+    num++;
+    return 'a' + num;
+}
+
+static const struct rt_uart_ops _utest_ops2 =
+{
+    RT_NULL,
+    RT_NULL,
+    uart_putc,
+    utest_getc_2,
+};
+
+static rt_err_t utest_lower_run(struct rt_serial_device* serial, char ch, void* data)
+{
+    uassert_true(ch == 'a');
+    cnt++;
+    return RT_EOK;
+}
+
+
+static int utest_getc(struct rt_serial_device* serial)
+{
+    static rt_uint8_t num = 0;
+    if (num == 10)
+        return -1;
+    num++;
+    return 'a';
+}
+
+static const struct rt_uart_ops _utest_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    uart_putc,
+    utest_getc,
+};
+static void bypass_lower_001(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    _serial0->ops = &_utest_ops;
+    rt_bypass_lower_register(_serial0, "utest", RT_BYPASS_MAX_LEVEL, utest_lower_run, RT_NULL);
+
+    rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    rt_thread_mdelay(100);
+    uassert_true(cnt == 10);
+    _serial0->ops = tmp;
+    rt_bypass_lower_unregister(_serial0, RT_BYPASS_MAX_LEVEL);
+}
+
+static void bypass_lower_002(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    _serial0->ops = &_utest_ops2;
+    rt_bypass_lower_register(_serial0, "utest", RT_BYPASS_MAX_LEVEL, utest_lower_run_test2, RT_NULL);
+
+    rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    rt_thread_mdelay(100);
+    uassert_true(cnt == 10);
+    _serial0->ops = tmp;
+    rt_bypass_lower_unregister(_serial0, RT_BYPASS_MAX_LEVEL);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    _serial0 = (struct rt_serial_device*)rt_console_get_device();
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void _testcase(void)
+{
+    UTEST_UNIT_RUN(bypass_lower_001);
+    UTEST_UNIT_RUN(bypass_lower_002);
+}
+
+UTEST_TC_EXPORT(_testcase, "testcase.bypass.lower.001", utest_tc_init, utest_tc_cleanup, 10);

examples/utest/testcases/drivers/serial_bypass/bypass_register.c

@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-20     zhujiale     the first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+static struct rt_serial_device* _serial0;
+static struct rt_spinlock lock;
+
+static rt_err_t utest_001_run(struct rt_serial_device* serial, char ch, void* data)
+{
+    return 0;
+}
+
+static void thread_serial_register1(void* parameter)
+{
+    for (int i = 2; i < 10; i += 2)
+    {
+        rt_bypass_upper_register(_serial0, "test", i, utest_001_run, RT_NULL);
+    }
+}
+
+static void thread_serial_register_upper(void* parameter)
+{
+    for (int i = 1; i < 10; i++)
+    {
+        rt_bypass_upper_register(_serial0, "test", i, utest_001_run, RT_NULL);
+    }
+}
+
+static void thread_serial_register_lower(void* parameter)
+{
+    for (int i = 1; i < 10; i++)
+    {
+        rt_bypass_lower_register(_serial0, "test", i, utest_001_run, RT_NULL);
+    }
+}
+
+static void bypass_register_001(void)
+{
+    rt_thread_t t1 = rt_thread_create("serial_register", thread_serial_register1, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+    rt_bypass_upper_register(_serial0, "test", 0, utest_001_run, RT_NULL);
+    rt_thread_startup(t1);
+    for (int i = 1; i < 10; i += 2)
+    {
+        rt_bypass_upper_register(_serial0, "test", i, utest_001_run, RT_NULL);
+    }
+    rt_thread_mdelay(1000);
+    rt_list_t* node = _serial0->bypass->upper_h->head.next;
+    for (int i = 0; i < 10;i++)
+    {
+        rt_list_t* next = node->next;
+        struct rt_serial_bypass_func* temp = rt_container_of(node, struct rt_serial_bypass_func, node);
+        uassert_true(temp->level == i);
+        rt_bypass_upper_unregister(_serial0, temp->level);
+        node = next;
+    }
+
+}
+
+static void bypass_register_002(void)
+{
+    rt_thread_t t1 = rt_thread_create("serial_register", thread_serial_register_upper, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+    rt_thread_t t2 = rt_thread_create("serial_register", thread_serial_register_lower, RT_NULL, 2048, RT_THREAD_PRIORITY_MAX - 5, 10);
+    rt_bypass_upper_register(_serial0, "test", 0, utest_001_run, RT_NULL);
+
+    rt_thread_startup(t1);
+    rt_thread_startup(t2);
+
+    rt_thread_mdelay(1000);
+    rt_list_t* node = _serial0->bypass->upper_h->head.next;
+    for (int i = 0; i < 10;i++)
+    {
+        rt_list_t* next = node->next;
+        struct rt_serial_bypass_func* temp = rt_container_of(node, struct rt_serial_bypass_func, node);
+        uassert_true(temp->level == i);
+        rt_bypass_upper_unregister(_serial0, temp->level);
+        node = next;
+    }
+    node = _serial0->bypass->lower_h->head.next;
+    for (int i = 1; i < 10;i++)
+    {
+        rt_list_t* next = node->next;
+        struct rt_serial_bypass_func* temp = rt_container_of(node, struct rt_serial_bypass_func, node);
+        uassert_true(temp->level == i);
+        rt_bypass_lower_unregister(_serial0, temp->level);
+        node = next;
+    }
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    _serial0 = (struct rt_serial_device*)rt_console_get_device();
+    rt_spin_lock_init(&lock);
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void _testcase(void)
+{
+    UTEST_UNIT_RUN(bypass_register_001);
+    UTEST_UNIT_RUN(bypass_register_002);
+}
+
+UTEST_TC_EXPORT(_testcase, "testcase.bypass.register.001", utest_tc_init, utest_tc_cleanup, 10);

examples/utest/testcases/drivers/serial_bypass/bypass_upper_run.c

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-11-20     zhujiale     the first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "utest.h"
+
+static struct rt_serial_device* _serial0;
+static int cnt;
+
+#define __REG32(x) (*((volatile unsigned int*)((rt_ubase_t)x)))
+#define UART_FR(base)   __REG32(base + 0x18)
+#define UART_DR(base)   __REG32(base + 0x00)
+#define UARTFR_TXFF     0x20
+static rt_err_t utest_upper_run(struct rt_serial_device* serial, char ch, void* data)
+{
+    uassert_true(ch == 'a');
+    cnt++;
+    return RT_EOK;
+}
+
+static int utest_getc(struct rt_serial_device* serial)
+{
+    static rt_uint8_t num = 0;
+    if (num == 10)
+        return -1;
+    num++;
+    return 'a';
+}
+
+struct hw_uart_device
+{
+    rt_size_t hw_base;
+    rt_size_t irqno;
+};
+
+static int uart_putc(struct rt_serial_device* serial, char c)
+{
+    struct hw_uart_device* uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device*)serial->parent.user_data;
+
+    while (UART_FR(uart->hw_base) & UARTFR_TXFF);
+    UART_DR(uart->hw_base) = c;
+
+    return 1;
+}
+
+static const struct rt_uart_ops _utest_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    uart_putc,
+    utest_getc,
+};
+
+static rt_err_t utest_lower_run_test2(struct rt_serial_device* serial, char ch, void* data)
+{
+    static rt_uint8_t num = 0;
+    num++;
+    uassert_true(ch == ('a' + num));
+    return RT_EOK;
+}
+
+static int utest_getc_2(struct rt_serial_device* serial)
+{
+    static rt_uint8_t num = 0;
+    if (num == 20)
+        return -1;
+    num++;
+    return 'a' + num;
+}
+
+static const struct rt_uart_ops _utest_ops2 =
+{
+    RT_NULL,
+    RT_NULL,
+    uart_putc,
+    utest_getc_2,
+};
+static void bypass_upper_001(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    _serial0->ops = &_utest_ops;
+    rt_bypass_upper_register(_serial0, "utest", RT_BYPASS_LEVEL_1, utest_upper_run, RT_NULL);
+    rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    uassert_true(cnt == 10);
+    _serial0->ops = tmp;
+    rt_bypass_upper_unregister(_serial0, RT_BYPASS_LEVEL_1);
+}
+
+static void bypass_upper_002(void)
+{
+    const struct rt_uart_ops* tmp = _serial0->ops;
+    _serial0->ops = &_utest_ops2;
+    rt_bypass_upper_register(_serial0, "utest", RT_BYPASS_MAX_LEVEL, utest_lower_run_test2, RT_NULL);
+
+    rt_hw_serial_isr(_serial0, RT_SERIAL_EVENT_RX_IND);
+    rt_thread_mdelay(100);
+    uassert_true(cnt == 10);
+    _serial0->ops = tmp;
+    rt_bypass_upper_unregister(_serial0, RT_BYPASS_MAX_LEVEL);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    _serial0 = (struct rt_serial_device*)rt_console_get_device();
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void _testcase(void)
+{
+    UTEST_UNIT_RUN(bypass_upper_001);
+    UTEST_UNIT_RUN(bypass_upper_002);
+}
+
+UTEST_TC_EXPORT(_testcase, "testcase.bypass.upper.001", utest_tc_init, utest_tc_cleanup, 10);