drivers/usb/host/xhci-rzv2m.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * xHCI host controller driver for RZ/V2M
   4  *
   5  * Copyright (C) 2022 Renesas Electronics Corporation
   6  */
   7
   8 #include <linux/usb/rzv2m_usb3drd.h>
   9 #include "xhci-plat.h"
  10 #include "xhci-rzv2m.h"
  11
  12 #define RZV2M_USB3_INTEN        0x1044  /* Interrupt Enable */
  13
  14 #define RZV2M_USB3_INT_XHC_ENA  BIT(0)
  15 #define RZV2M_USB3_INT_HSE_ENA  BIT(2)
  16 #define RZV2M_USB3_INT_ENA_VAL  (RZV2M_USB3_INT_XHC_ENA \
  17                                  | RZV2M_USB3_INT_HSE_ENA)
  18
  19 int xhci_rzv2m_init_quirk(struct usb_hcd *hcd)
  20 {
  21         struct device *dev = hcd->self.controller;
  22
  23         rzv2m_usb3drd_reset(dev->parent, true);
  24
  25         return 0;
  26 }
  27
  28 void xhci_rzv2m_start(struct usb_hcd *hcd)
  29 {
  30         u32 int_en;
  31
  32         if (hcd->regs) {
  33                 /* Interrupt Enable */
  34                 int_en = readl(hcd->regs + RZV2M_USB3_INTEN);
  35                 int_en |= RZV2M_USB3_INT_ENA_VAL;
  36                 writel(int_en, hcd->regs + RZV2M_USB3_INTEN);
  37         }
  38 }