1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Renesas USB driver RZ/A2 initialization and power control
4 *
5 * Copyright (C) 2019 Chris Brandt
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 */
8
9#include <linux/delay.h>
10#include <linux/io.h>
11#include <linux/phy/phy.h>
12#include "common.h"
13#include "rza.h"
14
15static int usbhs_rza2_hardware_init(struct platform_device *pdev)
16{
17	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
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
27static int usbhs_rza2_hardware_exit(struct platform_device *pdev)
28{
29	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
30
31	phy_put(&pdev->dev, priv->phy);
32	priv->phy = NULL;
33
34	return 0;
35}
36
37static int usbhs_rza2_power_ctrl(struct platform_device *pdev,
38				void __iomem *base, int enable)
39{
40	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
41	int retval = 0;
42
43	if (!priv->phy)
44		return -ENODEV;
45
46	if (enable) {
47		retval = phy_init(priv->phy);
48		usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
49		udelay(100);	/* Wait for PLL to become stable */
50		if (!retval)
51			retval = phy_power_on(priv->phy);
52	} else {
53		usbhs_bset(priv, SUSPMODE, SUSPM, 0);
54		phy_power_off(priv->phy);
55		phy_exit(priv->phy);
56	}
57
58	return retval;
59}
60
61const struct renesas_usbhs_platform_info usbhs_rza2_plat_info = {
62	.platform_callback = {
63		.hardware_init = usbhs_rza2_hardware_init,
64		.hardware_exit = usbhs_rza2_hardware_exit,
65		.power_ctrl = usbhs_rza2_power_ctrl,
66		.get_id = usbhs_get_id_as_gadget,
67	},
68	.driver_param = {
69		.has_cnen = 1,
70		.cfifo_byte_addr = 1,
71		.has_new_pipe_configs = 1,
72	},
73};
74