1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver R-Car Gen. 2 initialization and power control
4 *
5 * Copyright (C) 2014 Ulrich Hecht
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 */
8
9#include <linux/phy/phy.h>
10#include "common.h"
11#include "rcar2.h"
12
13static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
14{
15	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
16
17	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
18		struct phy *phy = phy_get(&pdev->dev, "usb");
19
20		if (IS_ERR(phy))
21			return PTR_ERR(phy);
22
23		priv->phy = phy;
24		return 0;
25	}
26
27	return -ENXIO;
28}
29
30static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
31{
32	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
33
34	if (priv->phy) {
35		phy_put(&pdev->dev, priv->phy);
36		priv->phy = NULL;
37	}
38
39	return 0;
40}
41
42static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
43				void __iomem *base, int enable)
44{
45	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
46	int retval = -ENODEV;
47
48	if (priv->phy) {
49		if (enable) {
50			retval = phy_init(priv->phy);
51
52			if (!retval)
53				retval = phy_power_on(priv->phy);
54		} else {
55			phy_power_off(priv->phy);
56			phy_exit(priv->phy);
57			retval = 0;
58		}
59	}
60
61	return retval;
62}
63
64const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
65	.platform_callback = {
66		.hardware_init = usbhs_rcar2_hardware_init,
67		.hardware_exit = usbhs_rcar2_hardware_exit,
68		.power_ctrl = usbhs_rcar2_power_ctrl,
69		.get_id = usbhs_get_id_as_gadget,
70	},
71	.driver_param = {
72		.has_usb_dmac = 1,
73		.has_new_pipe_configs = 1,
74	},
75};
76