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/of_device.h>
12#include <linux/phy/phy.h>
13#include "common.h"
14#include "rza.h"
15
16static int usbhs_rza2_hardware_init(struct platform_device *pdev)
17{
18	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
19	struct phy *phy = phy_get(&pdev->dev, "usb");
20
21	if (IS_ERR(phy))
22		return PTR_ERR(phy);
23
24	priv->phy = phy;
25	return 0;
26}
27
28static int usbhs_rza2_hardware_exit(struct platform_device *pdev)
29{
30	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
31
32	phy_put(priv->phy);
33	priv->phy = NULL;
34
35	return 0;
36}
37
38static int usbhs_rza2_power_ctrl(struct platform_device *pdev,
39				void __iomem *base, int enable)
40{
41	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
42	int retval = 0;
43
44	if (!priv->phy)
45		return -ENODEV;
46
47	if (enable) {
48		retval = phy_init(priv->phy);
49		usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
50		udelay(100);	/* Wait for PLL to become stable */
51		if (!retval)
52			retval = phy_power_on(priv->phy);
53	} else {
54		usbhs_bset(priv, SUSPMODE, SUSPM, 0);
55		phy_power_off(priv->phy);
56		phy_exit(priv->phy);
57	}
58
59	return retval;
60}
61
62const struct renesas_usbhs_platform_info usbhs_rza2_plat_info = {
63	.platform_callback = {
64		.hardware_init = usbhs_rza2_hardware_init,
65		.hardware_exit = usbhs_rza2_hardware_exit,
66		.power_ctrl = usbhs_rza2_power_ctrl,
67		.get_id = usbhs_get_id_as_gadget,
68	},
69	.driver_param = {
70		.has_cnen = 1,
71		.cfifo_byte_addr = 1,
72		.has_new_pipe_configs = 1,
73	},
74};