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/gpio.h>
10#include <linux/of_gpio.h>
11#include <linux/phy/phy.h>
12#include "common.h"
13#include "rcar2.h"
14
15static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
16{
17	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
18
19	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
20		struct phy *phy = phy_get(&pdev->dev, "usb");
21
22		if (IS_ERR(phy))
23			return PTR_ERR(phy);
24
25		priv->phy = phy;
26		return 0;
27	}
28
29	return -ENXIO;
30}
31
32static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
33{
34	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
35
36	if (priv->phy) {
37		phy_put(priv->phy);
38		priv->phy = NULL;
39	}
40
41	return 0;
42}
43
44static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
45				void __iomem *base, int enable)
46{
47	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
48	int retval = -ENODEV;
49
50	if (priv->phy) {
51		if (enable) {
52			retval = phy_init(priv->phy);
53
54			if (!retval)
55				retval = phy_power_on(priv->phy);
56		} else {
57			phy_power_off(priv->phy);
58			phy_exit(priv->phy);
59			retval = 0;
60		}
61	}
62
63	return retval;
64}
65
66const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
67	.platform_callback = {
68		.hardware_init = usbhs_rcar2_hardware_init,
69		.hardware_exit = usbhs_rcar2_hardware_exit,
70		.power_ctrl = usbhs_rcar2_power_ctrl,
71		.get_id = usbhs_get_id_as_gadget,
72	},
73	.driver_param = {
74		.has_usb_dmac = 1,
75		.has_new_pipe_configs = 1,
76	},
77};