Commit 5db5025d authored by Biju Das's avatar Biju Das Committed by Greg Kroah-Hartman
Browse files

usb: host: xhci-rcar: Add Renesas RZ/G3E USB3 Host driver support 



The USB3.2 Gen2 Host controller (a.k.a USB3HOST), IP found on the RZ/G3E
SoC is similar to R-Car XHCI, but it doesn't require any firmware.

Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250916150255.4231-7-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2ef16e4e

drivers/usb/host/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -93,7 +93,7 @@ config USB_XHCI_RCAR 
	default ARCH_RENESAS

	help

	  Say 'Y' to enable the support for the xHCI host controller

	  found in Renesas R-Car ARM SoCs.

	  found in Renesas R-Car and RZ/G3E alike ARM SoCs.



config USB_XHCI_RZV2M

	bool "xHCI support for Renesas RZ/V2M SoC"

drivers/usb/host/xhci-rcar.c

+55 −0
Original line number Diff line number Diff line
@@ -11,10 +11,12 @@ 
#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/usb/phy.h>

#include <linux/reset.h>



#include "xhci.h"

#include "xhci-plat.h"

#include "xhci-rcar-regs.h"

#include "xhci-rzg3e-regs.h"

#include "xhci-rzv2m.h"



#define XHCI_RCAR_FIRMWARE_NAME_V1	"r8a779x_usb3_v1.dlmem"
@@ -67,6 +69,48 @@ static void xhci_rcar_start(struct usb_hcd *hcd) 
	}

}



static void xhci_rzg3e_start(struct usb_hcd *hcd)

{

	u32 int_en;



	if (hcd->regs) {

		/* Update the controller initial setting */

		writel(0x03130200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(0));

		writel(0x00160200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(1));

		writel(0x03150000, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(2));

		writel(0x03130200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(3));

		writel(0x00180000, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(4));



		/* Interrupt Enable */

		int_en = readl(hcd->regs + RZG3E_USB3_HOST_INTEN);

		int_en |= RZG3E_USB3_HOST_INTEN_ENA;

		writel(int_en, hcd->regs + RZG3E_USB3_HOST_INTEN);

	}

}



static int xhci_rzg3e_resume(struct usb_hcd *hcd)

{

	struct xhci_hcd *xhci = hcd_to_xhci(hcd);



	return reset_control_deassert(xhci->reset);

}



static int xhci_rzg3e_post_resume(struct usb_hcd *hcd)

{

	xhci_rzg3e_start(hcd);



	return 0;

}



static int xhci_rzg3e_suspend(struct usb_hcd *hcd)

{

	struct xhci_hcd *xhci = hcd_to_xhci(hcd);



	reset_control_assert(xhci->reset);



	return 0;

}



static int xhci_rcar_download_firmware(struct usb_hcd *hcd)

{

	struct device *dev = hcd->self.controller;
@@ -190,6 +234,14 @@ static const struct xhci_plat_priv xhci_plat_renesas_rzv2m = { 
	.plat_start = xhci_rzv2m_start,

};



static const struct xhci_plat_priv xhci_plat_renesas_rzg3e = {

	.quirks = XHCI_NO_64BIT_SUPPORT | XHCI_RESET_ON_RESUME | XHCI_SUSPEND_RESUME_CLKS,

	.plat_start = xhci_rzg3e_start,

	.suspend_quirk = xhci_rzg3e_suspend,

	.resume_quirk = xhci_rzg3e_resume,

	.post_resume_quirk = xhci_rzg3e_post_resume,

};



static const struct of_device_id usb_xhci_of_match[] = {

	{

		.compatible = "renesas,xhci-r8a7790",
@@ -206,6 +258,9 @@ static const struct of_device_id usb_xhci_of_match[] = { 
	}, {

		.compatible = "renesas,xhci-r8a7796",

		.data = &xhci_plat_renesas_rcar_gen3,

	}, {

		.compatible = "renesas,r9a09g047-xhci",

		.data = &xhci_plat_renesas_rzg3e,

	}, {

		.compatible = "renesas,rcar-gen2-xhci",

		.data = &xhci_plat_renesas_rcar_gen2,

drivers/usb/host/xhci-rzg3e-regs.h

0 → 100644
+12 −0
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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __XHCI_RZG3E_H

#define __XHCI_RZG3E_H



#define RZG3E_USB3_HOST_INTEN		0x1044	/* Interrupt Enable */

#define RZG3E_USB3_HOST_U3P0PIPESC(x)	(0x10c0 + (x) * 4) /* PIPE Status and Control Register */



#define RZG3E_USB3_HOST_INTEN_XHC	BIT(0)

#define RZG3E_USB3_HOST_INTEN_HSE	BIT(2)

#define RZG3E_USB3_HOST_INTEN_ENA	(RZG3E_USB3_HOST_INTEN_XHC | RZG3E_USB3_HOST_INTEN_HSE)



#endif /* __XHCI_RZG3E_H */