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.h"
  10 #include "xhci-plat.h"
  11 #include "xhci-rzv2m.h"
  12
  13 #define RZV2M_USB3_INTEN        0x1044  /* Interrupt Enable */
  14
  15 #define RZV2M_USB3_INT_XHC_ENA  BIT(0)
  16 #define RZV2M_USB3_INT_HSE_ENA  BIT(2)
  17 #define RZV2M_USB3_INT_ENA_VAL  (RZV2M_USB3_INT_XHC_ENA \
  18                                  | RZV2M_USB3_INT_HSE_ENA)
  19
  20 int xhci_rzv2m_init_quirk(struct usb_hcd *hcd)
  21 {
  22         struct device *dev = hcd->self.controller;
  23
  24         rzv2m_usb3drd_reset(dev->parent, true);
  25
  26         return 0;
  27 }
  28
  29 void xhci_rzv2m_start(struct usb_hcd *hcd)
  30 {
  31         u32 int_en;
  32
  33         if (hcd->regs) {
  34                 /* Interrupt Enable */
  35                 int_en = readl(hcd->regs + RZV2M_USB3_INTEN);
  36                 int_en |= RZV2M_USB3_INT_ENA_VAL;
  37                 writel(int_en, hcd->regs + RZV2M_USB3_INTEN);
  38         }
  39 }