diff --git a/src/portable/microchip/samg/dcd_samg.c b/src/portable/microchip/samg/dcd_samg.c
index 8b5bebf85..f8b204508 100644
--- a/src/portable/microchip/samg/dcd_samg.c
+++ b/src/portable/microchip/samg/dcd_samg.c
@@ -297,34 +297,13 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
   return true;
 }
 
+#if 0 // TODO support dcd_edpt_xfer_fifo API
 bool dcd_edpt_xfer_fifo (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_t total_bytes)
 {
   (void) rhport;
-
-  uint8_t const epnum = tu_edpt_number(ep_addr);
-  uint8_t const dir   = tu_edpt_dir(ep_addr);
-
-  xfer_desc_t* xfer = &_dcd_xfer[epnum];
-  xfer->total_len   = total_bytes;
-  xfer->actual_len  = 0;
-  xfer->buffer      = NULL;                                 // Indicates a FIFO shall be used
-  xfer->ff          = ff;
-
-  if (dir == TUSB_DIR_OUT)
-  {
-    // Enable interrupt when starting OUT transfer
-    if (epnum != 0) UDP->UDP_IER |= (1 << epnum);
-  }
-  else
-  {
-    tu_fifo_read_n(ff, (void *) &UDP->UDP_FDR[epnum], xfer_packet_len(xfer));
-
-    // TX ready for transfer
-    csr_set(epnum, UDP_CSR_TXPKTRDY_Msk);
-  }
-
   return true;
 }
+#endif
 
 // Stall endpoint
 void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr)
@@ -435,11 +414,13 @@ void dcd_int_handler(uint8_t rhport)
         if (xact_len)
         {
           // write to EP fifo
+#if 0 // TODO support dcd_edpt_xfer_fifo
           if (xfer->ff)
           {
             tu_fifo_read_n_const_addr_full_words(xfer->ff, (void *) &UDP->UDP_FDR[epnum], xact_len);
           }
           else
+#endif
           {
             xact_ep_write(epnum, xfer->buffer, xact_len);
           }
@@ -468,11 +449,13 @@ void dcd_int_handler(uint8_t rhport)
         uint16_t const xact_len = (uint16_t) ((UDP->UDP_CSR[epnum] & UDP_CSR_RXBYTECNT_Msk) >> UDP_CSR_RXBYTECNT_Pos);
 
         // Read from EP fifo
+#if 0 // TODO support dcd_edpt_xfer_fifo API
         if (xfer->ff)
         {
           tu_fifo_write_n_const_addr_full_words(xfer->ff, (const void *) &UDP->UDP_FDR[epnum], xact_len);
         }
         else
+#endif
         {
           xact_ep_read(epnum, xfer->buffer, xact_len);
         }