From aed1da913b2112c9b1bee6cbe03f5dd9b35334c8 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Sun, 17 Apr 2016 12:00:34 +0100
Subject: [PATCH] stmhal: L4: Modify usbd_conf.c to support L4 MCU.

Original patch was authored by Tobias Badertscher / @tobbad, but it was
reworked to split UART edits from USB edits.
---
 stmhal/usbd_conf.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/stmhal/usbd_conf.c b/stmhal/usbd_conf.c
index ad449d9a1b..1da987d89a 100644
--- a/stmhal/usbd_conf.c
+++ b/stmhal/usbd_conf.c
@@ -94,6 +94,20 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd)
     /* Enable USB FS Clocks */ 
     __USB_OTG_FS_CLK_ENABLE();
     
+#if defined (MCU_SERIES_L4)
+    /* Enable VDDUSB */
+    if(__HAL_RCC_PWR_IS_CLK_DISABLED())
+    {
+      __HAL_RCC_PWR_CLK_ENABLE();
+      HAL_PWREx_EnableVddUSB();
+      __HAL_RCC_PWR_CLK_DISABLE();
+    }
+    else
+    {
+      HAL_PWREx_EnableVddUSB();
+    }
+#endif
+
     /* Set USBFS Interrupt priority */
     HAL_NVIC_SetPriority(OTG_FS_IRQn, IRQ_PRI_OTG_FS, IRQ_SUBPRI_OTG_FS);
     
@@ -296,9 +310,11 @@ void HAL_PCD_ResetCallback(PCD_HandleTypeDef *hpcd)
   /* Set USB Current Speed */
   switch(hpcd->Init.speed)
   {
+#if defined(PCD_SPEED_HIGH)
   case PCD_SPEED_HIGH:
     speed = USBD_SPEED_HIGH;
     break;
+#endif
     
   case PCD_SPEED_FULL:
     speed = USBD_SPEED_FULL;    
@@ -399,6 +415,10 @@ if (pdev->id ==  USB_PHY_FS_ID)
   pcd_fs_handle.Init.phy_itface = PCD_PHY_EMBEDDED;
   pcd_fs_handle.Init.Sof_enable = 1;
   pcd_fs_handle.Init.speed = PCD_SPEED_FULL;
+#if defined(MCU_SERIES_L4)
+  pcd_fs_handle.Init.lpm_enable = DISABLE;
+  pcd_fs_handle.Init.battery_charging_enable = DISABLE;
+#endif
 #if !defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
   pcd_fs_handle.Init.vbus_sensing_enable = 0; // No VBUS Sensing on USB0
 #else