add usbh_spin_lock/unlock() use spinlock instead of atomic flag for hcd max3421

2 files changed, 16 insertions, 0 deletions

diff --git a/src/host/usbh.c b/src/host/usbh.c
index b7d5a05f2..f2e5c1f0e 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -147,6 +147,9 @@ static osal_mutex_t _usbh_mutex;
 #define _usbh_mutex   NULL
 #endif
 
+// Spinlock for interrupt handler
+static OSAL_SPINLOCK_DEF(_usbh_spin, usbh_int_set);
+
 // Event queue: usbh_int_set() is used as mutex in OS NONE config
 OSAL_QUEUE_DEF(usbh_int_set, _usbh_qdef, CFG_TUH_TASK_QUEUE_SZ, hcd_event_t);
 static osal_queue_t _usbh_q;
@@ -424,6 +427,8 @@ bool tuh_rhport_init(uint8_t rhport, const tusb_rhport_init_t* rh_init) {
     TU_LOG_INT_USBH(sizeof(tu_fifo_t));
     TU_LOG_INT_USBH(sizeof(tu_edpt_stream_t));
 
+    osal_spin_init(&_usbh_spin);
+
     // Event queue
     _usbh_q = osal_queue_create(&_usbh_qdef);
     TU_ASSERT(_usbh_q != NULL);
@@ -895,6 +900,14 @@ void usbh_int_set(bool enabled) {
   }
 }
 
+void usbh_spin_lock(bool in_isr) {
+  osal_spin_lock(&_usbh_spin, in_isr);
+}
+
+void usbh_spin_unlock(bool in_isr) {
+  osal_spin_unlock(&_usbh_spin, in_isr);
+}
+
 void usbh_defer_func(osal_task_func_t func, void *param, bool in_isr) {
   hcd_event_t event = { 0 };
   event.event_id = USBH_EVENT_FUNC_CALL;
diff --git a/src/host/usbh_pvt.h b/src/host/usbh_pvt.h
index 61b012493..cb092e5f3 100644
--- a/src/host/usbh_pvt.h
+++ b/src/host/usbh_pvt.h
@@ -71,6 +71,9 @@ void usbh_int_set(bool enabled);
 
 void usbh_defer_func(osal_task_func_t func, void *param, bool in_isr);
 
+void usbh_spin_lock(bool in_isr);
+void usbh_spin_unlock(bool in_isr);
+
 //--------------------------------------------------------------------+
 // USBH Endpoint API
 //--------------------------------------------------------------------+