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RZ/V2M is similar to R-Car XHCI but it doesn't require any firmware, we need to reset the USB Host reset release in DRD Module before accessing host registers. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20230121145853.4792-10-biju.das.jz@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
39 lines
838 B
C
39 lines
838 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* xHCI host controller driver for RZ/V2M
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*
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* Copyright (C) 2022 Renesas Electronics Corporation
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*/
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#include <linux/usb/rzv2m_usb3drd.h>
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#include "xhci-plat.h"
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#include "xhci-rzv2m.h"
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#define RZV2M_USB3_INTEN 0x1044 /* Interrupt Enable */
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#define RZV2M_USB3_INT_XHC_ENA BIT(0)
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#define RZV2M_USB3_INT_HSE_ENA BIT(2)
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#define RZV2M_USB3_INT_ENA_VAL (RZV2M_USB3_INT_XHC_ENA \
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| RZV2M_USB3_INT_HSE_ENA)
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int xhci_rzv2m_init_quirk(struct usb_hcd *hcd)
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{
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struct device *dev = hcd->self.controller;
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rzv2m_usb3drd_reset(dev->parent, true);
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return 0;
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}
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void xhci_rzv2m_start(struct usb_hcd *hcd)
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{
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u32 int_en;
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if (hcd->regs) {
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/* Interrupt Enable */
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int_en = readl(hcd->regs + RZV2M_USB3_INTEN);
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int_en |= RZV2M_USB3_INT_ENA_VAL;
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writel(int_en, hcd->regs + RZV2M_USB3_INTEN);
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}
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}
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