port and add comment for gccfg with gd/at/st

port/dwc2/README.md

@@ -14,7 +14,7 @@
 
 ## AT32
 
-- AT32F415xx
+- AT32F402xx、AT32F405xx、AT32F415xx、AT32F423xx、AT32F425xx、AT32F435xx、AT32F437xx
 
 ## GD32
 

port/dwc2/usb_glue_at.c

@@ -0,0 +1,30 @@
+#include "usb_config.h"
+#include "stdint.h"
+#include "usb_dwc2_reg.h"
+
+/* you can find this config in function: usb_global_init, file:at32fxxx_usb.c, for example:
+ *
+ *  usbx->gccfg_bit.pwrdown = TRUE;
+ *  usbx->gccfg_bit.avalidsesen = TRUE;
+ *  usbx->gccfg_bit.bvalidsesen = TRUE;
+ * 
+*/
+
+uint32_t usbd_get_dwc2_gccfg_conf(void)
+{
+#ifdef CONFIG_USB_HS
+    return (1 << 16);
+#else
+    // return ((1 << 16) | (1 << 18) | (1 << 19));
+    return (1 << 16);
+#endif
+}
+
+uint32_t usbh_get_dwc2_gccfg_conf(void)
+{
+#ifdef CONFIG_USB_DWC2_ULPI_PHY
+    return (1 << 16);
+#else
+    return (1 << 16);
+#endif
+}

port/dwc2/usb_glue_gd.c

@@ -0,0 +1,27 @@
+#include "usb_config.h"
+#include "stdint.h"
+#include "usb_dwc2_reg.h"
+
+/* you can find this config in function:usb_core_init, file:drv_usb_core.c, for example:
+ *
+ *  usb_regs->gr->GCCFG |= GCCFG_PWRON | GCCFG_VBUSACEN | GCCFG_VBUSBCEN;
+ * 
+*/
+
+uint32_t usbd_get_dwc2_gccfg_conf(void)
+{
+#ifdef CONFIG_USB_HS
+    return 0;
+#else
+    return ((1 << 16) | (1 << 18) | (1 << 19));
+#endif
+}
+
+uint32_t usbh_get_dwc2_gccfg_conf(void)
+{
+#ifdef CONFIG_USB_DWC2_ULPI_PHY
+    return 0;
+#else
+    return ((1 << 16) | (1 << 18) | (1 << 19));
+#endif
+}

port/dwc2/usb_glue_st.c

@@ -2,7 +2,14 @@
 #include "stdint.h"
 #include "usb_dwc2_reg.h"
 
-/* st different chips maybe have a little difference in this register, you should check this */
+/* you can find this config in function: USB_DevInit, file:stm32xxx_ll_usb.c, for example:
+ *
+ *  USBx->GCCFG |= USB_OTG_GCCFG_PWRDWN;
+ *  USBx->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
+ *  USBx->GCCFG &= ~USB_OTG_GCCFG_VBUSBSEN;
+ *  USBx->GCCFG &= ~USB_OTG_GCCFG_VBUSASEN;
+ * 
+*/
 
 uint32_t usbd_get_dwc2_gccfg_conf(void)
 {