4 files changed, 26 insertions, 16 deletions
diff --git a/src/device/dcd.h b/src/device/dcd.h
index 1e5b3ff1e..71e88054c 100644
--- a/src/device/dcd.h
+++ b/src/device/dcd.h
@@ -24,10 +24,6 @@
  * This file is part of the TinyUSB stack.
  */
 
-/** \ingroup group_usbd
- * \defgroup group_dcd Device Controller Driver (DCD)
- *  @{ */
-
 #ifndef _TUSB_DCD_H_
 #define _TUSB_DCD_H_
 
@@ -168,5 +164,3 @@ extern void dcd_event_xfer_complete (uint8_t rhport, uint8_t ep_addr, uint32_t x
 #endif
 
 #endif /* _TUSB_DCD_H_ */
-
-/// @}
diff --git a/src/device/usbd.c b/src/device/usbd.c
index 863add2c5..8454a2951 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -44,6 +44,10 @@
 //--------------------------------------------------------------------+
 // Device Data
 //--------------------------------------------------------------------+
+
+// Invalid driver ID in itf2drv[] ep2drv[][] mapping
+enum { DRVID_INVALID = 0xFFu };
+
 typedef struct
 {
   struct TU_ATTR_PACKED
@@ -76,9 +80,6 @@ typedef struct
 
 static usbd_device_t _usbd_dev;
 
-// Invalid driver ID in itf2drv[] ep2drv[][] mapping
-enum { DRVID_INVALID = 0xFFu };
-
 //--------------------------------------------------------------------+
 // Class Driver
 //--------------------------------------------------------------------+
@@ -253,6 +254,8 @@ static inline usbd_class_driver_t const * get_driver(uint8_t drvid)
 // DCD Event
 //--------------------------------------------------------------------+
 
+static bool _usbd_initialized = false;
+
 // Event queue
 // OPT_MODE_DEVICE is used by OS NONE for mutex (disable usb isr)
 OSAL_QUEUE_DEF(OPT_MODE_DEVICE, _usbd_qdef, CFG_TUD_TASK_QUEUE_SZ, dcd_event_t);
@@ -380,8 +383,16 @@ bool tud_connect(void)
 //--------------------------------------------------------------------+
 // USBD Task
 //--------------------------------------------------------------------+
-bool tud_init (void)
+bool tud_inited(void)
+{
+  return _usbd_initialized;
+}
+
+bool tud_init (uint8_t rhport)
 {
+  // skip if already initialized
+  if (_usbd_initialized) return _usbd_initialized;
+
   TU_LOG2("USBD init\r\n");
 
   tu_varclr(&_usbd_dev);
@@ -411,8 +422,10 @@ bool tud_init (void)
   }
 
   // Init device controller driver
-  dcd_init(TUD_OPT_RHPORT);
-  dcd_int_enable(TUD_OPT_RHPORT);
+  dcd_init(rhport);
+  dcd_int_enable(rhport);
+
+  _usbd_initialized = true;
 
   return true;
 }
@@ -1089,7 +1102,7 @@ void dcd_event_xfer_complete (uint8_t rhport, uint8_t ep_addr, uint32_t xferred_
 }
 
 //--------------------------------------------------------------------+
-// Helper
+// USBD API For Class Driver
 //--------------------------------------------------------------------+
 
 // Parse consecutive endpoint descriptors (IN & OUT)
@@ -1183,7 +1196,6 @@ bool usbd_edpt_claim(uint8_t rhport, uint8_t ep_addr)
 #if CFG_TUSB_OS != OPT_OS_NONE
   // pre-check to help reducing mutex lock
   TU_VERIFY((_usbd_dev.ep_status[epnum][dir].busy == 0) && (_usbd_dev.ep_status[epnum][dir].claimed == 0));
-
   osal_mutex_lock(_usbd_mutex, OSAL_TIMEOUT_WAIT_FOREVER);
 #endif
 
diff --git a/src/device/usbd.h b/src/device/usbd.h
index 9e94d8d90..53519c4de 100644
--- a/src/device/usbd.h
+++ b/src/device/usbd.h
@@ -41,7 +41,10 @@ extern "C" {
 //--------------------------------------------------------------------+
 
 // Init device stack
-bool tud_init (void);
+bool tud_init (uint8_t rhport);
+
+// Check if device stack is already initialized
+bool tud_inited(void);
 
 // Task function should be called in main/rtos loop
 void tud_task (void);
@@ -67,6 +70,7 @@ bool tud_mounted(void);
 bool tud_suspended(void);
 
 // Check if device is ready to transfer
+TU_ATTR_ALWAYS_INLINE
 static inline bool tud_ready(void)
 {
   return tud_mounted() && !tud_suspended();
diff --git a/src/device/usbd_pvt.h b/src/device/usbd_pvt.h
index 412a97a5d..44310f022 100644
--- a/src/device/usbd_pvt.h
+++ b/src/device/usbd_pvt.h
@@ -47,7 +47,7 @@ typedef struct
   void     (* reset            ) (uint8_t rhport);
   uint16_t (* open             ) (uint8_t rhport, tusb_desc_interface_t const * desc_intf, uint16_t max_len);
   bool     (* control_xfer_cb  ) (uint8_t rhport, uint8_t stage, tusb_control_request_t const * request);
-  bool     (* xfer_cb          ) (uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes);
+  bool     (* xfer_cb          ) (uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes);
   void     (* sof              ) (uint8_t rhport); /* optional */
 } usbd_class_driver_t;