Commit de18757e authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Felipe Balbi
Browse files

usb: renesas_usbhs: add R-Car Gen3 power control 



Since the usb2 phy driver for gen3 (phy-rcar-gen3-usb2) cannot access
LPSTS and UGCTRL2 registers in the HSUSB module, this driver have to
initialize the registers. So, this patch adds such handling code into
rcar3.c.

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: default avatarFelipe Balbi <balbi@kernel.org>
parent 7580862b

drivers/usb/renesas_usbhs/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 


obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs.o



renesas_usbhs-y			:= common.o mod.o pipe.o fifo.o rcar2.o

renesas_usbhs-y			:= common.o mod.o pipe.o fifo.o rcar2.o rcar3.o



ifneq ($(CONFIG_USB_RENESAS_USBHS_HCD),)

	renesas_usbhs-y		+= mod_host.o

drivers/usb/renesas_usbhs/common.c

+10 −4
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/sysfs.h>

#include "common.h"

#include "rcar2.h"

#include "rcar3.h"



/*

 *		image of renesas_usbhs
@@ -477,18 +478,16 @@ static const struct of_device_id usbhs_of_match[] = { 
		.data = (void *)USBHS_TYPE_RCAR_GEN2,

	},

	{

		/* Gen3 is compatible with Gen2 */

		.compatible = "renesas,usbhs-r8a7795",

		.data = (void *)USBHS_TYPE_RCAR_GEN2,

		.data = (void *)USBHS_TYPE_RCAR_GEN3,

	},

	{

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

		.data = (void *)USBHS_TYPE_RCAR_GEN2,

	},

	{

		/* Gen3 is compatible with Gen2 */

		.compatible = "renesas,rcar-gen3-usbhs",

		.data = (void *)USBHS_TYPE_RCAR_GEN2,

		.data = (void *)USBHS_TYPE_RCAR_GEN3,

	},

	{ },

};
@@ -578,6 +577,13 @@ static int usbhs_probe(struct platform_device *pdev) 
			priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);

		}

		break;

	case USBHS_TYPE_RCAR_GEN3:

		priv->pfunc = usbhs_rcar3_ops;

		if (!priv->dparam.pipe_configs) {

			priv->dparam.pipe_configs = usbhsc_new_pipe;

			priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);

		}

		break;

	default:

		if (!info->platform_callback.get_id) {

			dev_err(&pdev->dev, "no platform callbacks");

drivers/usb/renesas_usbhs/rcar3.c

0 → 100644
+54 −0
Original line number Diff line number Diff line 
/*

 * Renesas USB driver R-Car Gen. 3 initialization and power control

 *

 * Copyright (C) 2016 Renesas Electronics Corporation

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */



#include <linux/io.h>

#include "common.h"

#include "rcar3.h"



#define LPSTS		0x102

#define UGCTRL2		0x184	/* 32-bit register */



/* Low Power Status register (LPSTS) */

#define LPSTS_SUSPM	0x4000



/* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */

#define UGCTRL2_RESERVED_3	0x00000001	/* bit[3:0] should be B'0001 */

#define UGCTRL2_USB0SEL_OTG	0x00000030



void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)

{

	iowrite32(data, priv->base + reg);

}



static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,

				void __iomem *base, int enable)

{

	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);



	usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG);



	if (enable)

		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);

	else

		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);



	return 0;

}



static int usbhs_rcar3_get_id(struct platform_device *pdev)

{

	return USBHS_GADGET;

}



const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {

	.power_ctrl = usbhs_rcar3_power_ctrl,

	.get_id = usbhs_rcar3_get_id,

};

drivers/usb/renesas_usbhs/rcar3.h

0 → 100644
+3 −0
Original line number Diff line number Diff line 
#include "common.h"



extern const struct renesas_usbhs_platform_callback usbhs_rcar3_ops;

include/linux/usb/renesas_usbhs.h

+1 −0
Original line number Diff line number Diff line
@@ -184,6 +184,7 @@ struct renesas_usbhs_driver_param { 
};



#define USBHS_TYPE_RCAR_GEN2	1

#define USBHS_TYPE_RCAR_GEN3	2



/*

 * option:

CRA Git | Maintained and supported by SUSTech CRA and CCSE