Merge pull request #1027 from kkitayam/remove_redundant_from_renesas

Remove redundant SOF processing from the Renesas RX family.

Author: hathach

src/portable/renesas/usba/dcd_usba.c

@@ -27,6 +27,10 @@
 
 #include "tusb_option.h"
 
+// Since TinyUSB doesn't use SOF for now, and this interrupt too often (1ms interval)
+// We disable SOF for now until needed later on
+#define USE_SOF     0
+
 #if TUSB_OPT_DEVICE_ENABLED && ( CFG_TUSB_MCU == OPT_MCU_RX63X || \
                                  CFG_TUSB_MCU == OPT_MCU_RX65X || \
                                  CFG_TUSB_MCU == OPT_MCU_RX72N )
@@ -139,7 +143,6 @@ typedef struct
 {
   pipe_state_t pipe[10];
   uint8_t ep[2][16];   /* a lookup table for a pipe index from an endpoint address */
-  uint8_t suspended;
 } dcd_data_t;
 
 //--------------------------------------------------------------------+
@@ -627,7 +630,7 @@ void dcd_init(uint8_t rhport)
   /* Setup default control pipe */
   USB0.DCPMAXP.BIT.MXPS  = 64;
   USB0.INTENB0.WORD = USB_IS0_VBINT | USB_IS0_BRDY | USB_IS0_BEMP |
-    USB_IS0_DVST | USB_IS0_CTRT | USB_IS0_SOFR | USB_IS0_RESM;
+    USB_IS0_DVST | USB_IS0_CTRT | (USE_SOF ? USB_IS0_SOFR: 0) | USB_IS0_RESM;
   USB0.BEMPENB.WORD = 1;
   USB0.BRDYENB.WORD = 1;
 
@@ -815,21 +818,16 @@ void dcd_int_handler(uint8_t rhport)
   }
   if (is0 & USB_IS0_RESM) {
     dcd_event_bus_signal(rhport, DCD_EVENT_RESUME, true);
-    _dcd.suspended = 0;
-  }
-  if (is0 & USB_IS0_SOFR) {
-    if (_dcd.suspended) {
-      /* When USB host resumes caused by `dcd_remote_wakeup()`,
-       * RESM interrupt does not rise.
-       * Therefore we need to manually send resume event.
-       * Of course, when USB host resumes on its own,
-       * RESM interrupt rise properly, then this statements are ignored. */
-      // TODO can be dropped since this logic is implemented by usbd
-      // USBD will exit suspended mode when SOF event is received
-      dcd_event_bus_signal(rhport, DCD_EVENT_RESUME, true);
-      _dcd.suspended = 0;
-    }
+#if (0==USE_SOF)
+    USB0.INTENB0.BIT.SOFE = 0;
+#endif
+  }
+  if ((is0 & USB_IS0_SOFR) && USB0.INTENB0.BIT.SOFE) {
+    // USBD will exit suspended mode when SOF event is received
     dcd_event_bus_signal(rhport, DCD_EVENT_SOF, true);
+#if (0==USE_SOF)
+    USB0.INTENB0.BIT.SOFE = 0;
+#endif
   }
   if (is0 & USB_IS0_DVST) {
     switch (is0 & USB_IS0_DVSQ) {
@@ -844,7 +842,9 @@ void dcd_int_handler(uint8_t rhport)
     case USB_IS0_DVSQ_SUSP2:
     case USB_IS0_DVSQ_SUSP3:
        dcd_event_bus_signal(rhport, DCD_EVENT_SUSPEND, true);
-       _dcd.suspended = 1;
+#if (0==USE_SOF)
+       USB0.INTENB0.BIT.SOFE = 1;
+#endif
     default:
       break;
     }