From 81cf8a5eec6b563a59048650157af1a2c8cc74d7 Mon Sep 17 00:00:00 2001
From: Gunar Schorcht <gunar@schorcht.net>
Date: Tue, 7 Mar 2023 23:40:02 +0100
Subject: [PATCH] cpu/gd32v: add periph_usbdev support

---
 cpu/gd32v/Kconfig                       | 1 +
 cpu/gd32v/Makefile.dep                  | 4 ++++
 cpu/gd32v/include/periph_cpu.h          | 3 ++-
 cpu/gd32v/include/vendor/usbdev_gd32v.h | 2 +-
 4 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/cpu/gd32v/Kconfig b/cpu/gd32v/Kconfig
index 43714dc786..02e8c2a6d4 100644
--- a/cpu/gd32v/Kconfig
+++ b/cpu/gd32v/Kconfig
@@ -30,6 +30,7 @@ config CPU_FAM_GD32V
 
     select MODULE_PERIPH_CLIC if TEST_KCONFIG
     select MODULE_PERIPH_WDT if MODULE_PERIPH_PM && HAS_PERIPH_WDT
+    select MODULE_USBDEV_SYNOPSYS_DWC2 if MODULE_PERIPH_USBDEV
     select ZTIMER_USEC if MODULE_PERIPH_I2C
     select PACKAGE_NMSIS_SDK
 
diff --git a/cpu/gd32v/Makefile.dep b/cpu/gd32v/Makefile.dep
index 21499ed618..dea7d86970 100644
--- a/cpu/gd32v/Makefile.dep
+++ b/cpu/gd32v/Makefile.dep
@@ -11,4 +11,8 @@ ifneq (,$(filter periph_i2c,$(USEMODULE)))
   USEMODULE += ztimer_usec
 endif
 
+ifneq (,$(filter periph_usbdev,$(USEMODULE)))
+  USEMODULE += usbdev_synopsys_dwc2
+endif
+
 include $(RIOTCPU)/riscv_common/Makefile.dep
diff --git a/cpu/gd32v/include/periph_cpu.h b/cpu/gd32v/include/periph_cpu.h
index 8fed2b6977..17431ea199 100644
--- a/cpu/gd32v/include/periph_cpu.h
+++ b/cpu/gd32v/include/periph_cpu.h
@@ -462,7 +462,8 @@ typedef struct {
  * @name    USB device definitions
  * @{
  */
-#define USBDEV_NUM_ENDPOINTS    4   /**< Number of USB OTG FS endpoints including EP0 */
+#define USBDEV_SET_ADDR_AFTER_STATUS    0   /**< Set device address after SETUP stage */
+#define USBDEV_NUM_ENDPOINTS            4   /**< Number of USB OTG FS endpoints including EP0 */
 /** @} */
 
 /**
diff --git a/cpu/gd32v/include/vendor/usbdev_gd32v.h b/cpu/gd32v/include/vendor/usbdev_gd32v.h
index db81063ad5..6e3f1ccc52 100644
--- a/cpu/gd32v/include/vendor/usbdev_gd32v.h
+++ b/cpu/gd32v/include/vendor/usbdev_gd32v.h
@@ -70,7 +70,7 @@
 #endif
 
 /**
- * @brief   Total size of the FIFO
+ * @brief   Total size of the FIFO in bytes
  */
 #define DWC2_USB_OTG_FS_TOTAL_FIFO_SIZE (1280)