1/*
 2 * Renesas USB driver R-Car Gen. 3 initialization and power control
 3 *
 4 * Copyright (C) 2016 Renesas Electronics Corporation
 5 *
 6 * This program is free software; you can redistribute it and/or modify
 7 * it under the terms of the GNU General Public License version 2 as
 8 * published by the Free Software Foundation.
 9 *
10 */
11
12#include <linux/io.h>
13#include "common.h"
14#include "rcar3.h"
15
16#define LPSTS		0x102
17#define UGCTRL2		0x184	/* 32-bit register */
18
19/* Low Power Status register (LPSTS) */
20#define LPSTS_SUSPM	0x4000
21
22/* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */
23#define UGCTRL2_RESERVED_3	0x00000001	/* bit[3:0] should be B'0001 */
24#define UGCTRL2_USB0SEL_OTG	0x00000030
25
26void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data)
27{
28	iowrite32(data, priv->base + reg);
29}
30
31static int usbhs_rcar3_power_ctrl(struct platform_device *pdev,
32				void __iomem *base, int enable)
33{
34	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
35
36	usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG);
37
38	if (enable)
39		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM);
40	else
41		usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0);
42
43	return 0;
44}
45
46static int usbhs_rcar3_get_id(struct platform_device *pdev)
47{
48	return USBHS_GADGET;
49}
50
51const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {
52	.power_ctrl = usbhs_rcar3_power_ctrl,
53	.get_id = usbhs_rcar3_get_id,
54};