add ch32 support for fsdev driver. v20x can select fsdev or usbfs with make/cmake PORT=0/1. default to fsdev

src/device/usbd.c

@@ -45,11 +45,6 @@
 //--------------------------------------------------------------------+
 // Weak stubs: invoked if no strong implementation is available
 //--------------------------------------------------------------------+
-TU_ATTR_WEAK bool dcd_deinit(uint8_t rhport) {
-  (void) rhport;
-  return false;
-}
-
 TU_ATTR_WEAK void tud_event_hook_cb(uint8_t rhport, uint32_t eventid, bool in_isr) {
   (void)rhport;
   (void)eventid;
@@ -60,6 +55,19 @@ TU_ATTR_WEAK void tud_sof_cb(uint32_t frame_count) {
   (void)frame_count;
 }
 
+TU_ATTR_WEAK bool dcd_deinit(uint8_t rhport) {
+  (void) rhport;
+  return false;
+}
+
+TU_ATTR_WEAK void dcd_connect(uint8_t rhport) {
+  (void) rhport;
+}
+
+TU_ATTR_WEAK void dcd_disconnect(uint8_t rhport) {
+  (void) rhport;
+}
+
 //--------------------------------------------------------------------+
 // Device Data
 //--------------------------------------------------------------------+
@@ -379,19 +387,16 @@ bool tud_remote_wakeup(void) {
 }
 
 bool tud_disconnect(void) {
-  TU_VERIFY(dcd_disconnect);
   dcd_disconnect(_usbd_rhport);
   return true;
 }
 
 bool tud_connect(void) {
-  TU_VERIFY(dcd_connect);
   dcd_connect(_usbd_rhport);
   return true;
 }
 
-bool tud_sof_cb_enable(bool en)
-{
+bool tud_sof_cb_enable(bool en) {
   usbd_sof_enable(_usbd_rhport, SOF_CONSUMER_USER, en);
   return true;
 }