tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
20int 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
29void 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}