moving esp32s2 to dwc2, abstract dwc2_set_turnaround()

src/portable/synopsys/dwc2/dwc2_gd32.h

@@ -28,14 +28,18 @@
 #ifndef DWC2_GD32_H_
 #define DWC2_GD32_H_
 
-// for remote wakeup delay
-#define __NOP()   __asm volatile ("nop")
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
 
 // These numbers are the same for the whole GD32VF103 family.
-#define DWC2_REG_BASE   0x50000000UL
-#define EP_MAX          4
-#define EP_FIFO_SIZE    1280
-#define RHPORT_IRQn     86
+#define DWC2_REG_BASE       0x50000000UL
+#define DWC2_EP_MAX         4
+#define DWC2_EP_FIFO_SIZE   1280
+#define RHPORT_IRQn         86
+
+extern uint32_t SystemCoreClock;
 
 // The GD32VF103 is a RISC-V MCU, which implements the ECLIC Core-Local
 // Interrupt Controller by Nuclei. It is nearly API compatible to the
@@ -66,4 +70,25 @@ static inline void dcd_dwc2_int_disable (uint8_t rhport)
   __eclic_disable_interrupt(RHPORT_IRQn);
 }
 
+TU_ATTR_ALWAYS_INLINE
+static inline void dwc2_remote_wakeup_delay(void)
+{
+  // try to delay for 1 ms
+  uint32_t count = SystemCoreClock / 1000;
+  while ( count-- ) __asm volatile ("nop");
+}
+
+static inline void dwc2_set_turnaround(dwc2_core_t * core, tusb_speed_t speed)
+{
+  (void) core;
+  (void) speed;
+
+  // keep the reset value
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* DWC2_GD32_H_ */