1/*
2 * Renesas USB driver R-Car Gen. 2 initialization and power control
3 *
4 * Copyright (C) 2014 Ulrich Hecht
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9 * GNU General Public License for more details.
10 *
11 */
12
13#include <linux/gpio.h>
14#include <linux/of_gpio.h>
15#include <linux/phy/phy.h>
16#include <linux/platform_data/gpio-rcar.h>
17#include <linux/usb/phy.h>
18#include "common.h"
19#include "rcar2.h"
20
21static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
22{
23	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
24
25	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
26		struct phy *phy = phy_get(&pdev->dev, "usb");
27
28		if (IS_ERR(phy))
29			return PTR_ERR(phy);
30
31		priv->phy = phy;
32		return 0;
33	}
34
35	if (IS_ENABLED(CONFIG_USB_PHY)) {
36		struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
37
38		if (IS_ERR(usb_phy))
39			return PTR_ERR(usb_phy);
40
41		priv->usb_phy = usb_phy;
42		return 0;
43	}
44
45	return -ENXIO;
46}
47
48static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
49{
50	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
51
52	if (priv->phy) {
53		phy_put(priv->phy);
54		priv->phy = NULL;
55	}
56
57	if (priv->usb_phy) {
58		usb_put_phy(priv->usb_phy);
59		priv->usb_phy = NULL;
60	}
61
62	return 0;
63}
64
65static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
66				void __iomem *base, int enable)
67{
68	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
69	int retval = -ENODEV;
70
71	if (priv->phy) {
72		if (enable) {
73			retval = phy_init(priv->phy);
74
75			if (!retval)
76				retval = phy_power_on(priv->phy);
77		} else {
78			phy_power_off(priv->phy);
79			phy_exit(priv->phy);
80			retval = 0;
81		}
82	}
83
84	if (priv->usb_phy) {
85		if (enable) {
86			retval = usb_phy_init(priv->usb_phy);
87
88			if (!retval)
89				retval = usb_phy_set_suspend(priv->usb_phy, 0);
90		} else {
91			usb_phy_set_suspend(priv->usb_phy, 1);
92			usb_phy_shutdown(priv->usb_phy);
93			retval = 0;
94		}
95	}
96
97	return retval;
98}
99
100static int usbhs_rcar2_get_id(struct platform_device *pdev)
101{
102	return USBHS_GADGET;
103}
104
105const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
106	.hardware_init = usbhs_rcar2_hardware_init,
107	.hardware_exit = usbhs_rcar2_hardware_exit,
108	.power_ctrl = usbhs_rcar2_power_ctrl,
109	.get_id = usbhs_rcar2_get_id,
110};
111