Merge pull request #3168 from hathach/feature/add_tusb_teardown

Feature/add tusb teardown

Author: hathach

src/tusb.c

@@ -136,6 +136,29 @@ void tusb_int_handler(uint8_t rhport, bool in_isr) {
   #endif
 }
 
+bool tusb_deinit(uint8_t rhport) {
+  TU_VERIFY(rhport < TUP_USBIP_CONTROLLER_NUM);
+  bool ret = false;
+
+  #if CFG_TUD_ENABLED
+  if (_tusb_rhport_role[rhport] == TUSB_ROLE_DEVICE) {
+    TU_ASSERT(tud_deinit(rhport));
+    _tusb_rhport_role[rhport] = TUSB_ROLE_INVALID;
+    ret = true;
+  }
+  #endif
+
+  #if CFG_TUH_ENABLED
+  if (_tusb_rhport_role[rhport] == TUSB_ROLE_HOST) {
+    TU_ASSERT(tuh_deinit(rhport));
+    _tusb_rhport_role[rhport] = TUSB_ROLE_INVALID;
+    ret = true;
+  }
+  #endif
+
+  return ret;
+}
+
 //--------------------------------------------------------------------+
 // Descriptor helper
 //--------------------------------------------------------------------+

src/tusb.h

@@ -140,7 +140,7 @@ bool tusb_rhport_init(uint8_t rhport, const tusb_rhport_init_t* rh_init);
 
 // Initialize roothub port with device/host role
 // Note: when using with RTOS, this should be called after scheduler/kernel is started.
-// Otherwise, it could cause kernel issue since USB IRQ handler does use RTOS queue API.
+//       Since USB IRQ handler does use RTOS queue API.
 // Note2: defined as macro for backward compatible with tusb_init(void), can be changed to function in the future.
 #if defined(TUD_OPT_RHPORT) || defined(TUH_OPT_RHPORT)
   #define _tusb_init_arg0()        tusb_rhport_init(0, NULL)
@@ -158,14 +158,15 @@ bool tusb_inited(void);
 // Called to handle usb interrupt/event. tusb_init(rhport, role) must be called before
 void tusb_int_handler(uint8_t rhport, bool in_isr);
 
-// TODO
-// bool tusb_teardown(void);
+// Deinit usb stack on roothub port
+bool tusb_deinit(uint8_t rhport);
 
 #else
 
 #define tusb_init(...)  (false)
 #define tusb_int_handler(...)  do {}while(0)
 #define tusb_inited()  (false)
+#define tusb_deinit(...) (false)
 
 #endif