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/usb/phy.h>
17#include "common.h"
18#include "rcar2.h"
19
20static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
21{
22	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
23
24	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
25		struct phy *phy = phy_get(&pdev->dev, "usb");
26
27		if (IS_ERR(phy))
28			return PTR_ERR(phy);
29
30		priv->phy = phy;
31		return 0;
32	}
33
34	if (IS_ENABLED(CONFIG_USB_PHY)) {
35		struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
36
37		if (IS_ERR(usb_phy))
38			return PTR_ERR(usb_phy);
39
40		priv->usb_phy = usb_phy;
41		return 0;
42	}
43
44	return -ENXIO;
45}
46
47static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
48{
49	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
50
51	if (priv->phy) {
52		phy_put(priv->phy);
53		priv->phy = NULL;
54	}
55
56	if (priv->usb_phy) {
57		usb_put_phy(priv->usb_phy);
58		priv->usb_phy = NULL;
59	}
60
61	return 0;
62}
63
64static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
65				void __iomem *base, int enable)
66{
67	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
68	int retval = -ENODEV;
69
70	if (priv->phy) {
71		if (enable) {
72			retval = phy_init(priv->phy);
73
74			if (!retval)
75				retval = phy_power_on(priv->phy);
76		} else {
77			phy_power_off(priv->phy);
78			phy_exit(priv->phy);
79			retval = 0;
80		}
81	}
82
83	if (priv->usb_phy) {
84		if (enable) {
85			retval = usb_phy_init(priv->usb_phy);
86
87			if (!retval)
88				retval = usb_phy_set_suspend(priv->usb_phy, 0);
89		} else {
90			usb_phy_set_suspend(priv->usb_phy, 1);
91			usb_phy_shutdown(priv->usb_phy);
92			retval = 0;
93		}
94	}
95
96	return retval;
97}
98
99static int usbhs_rcar2_get_id(struct platform_device *pdev)
100{
101	return USBHS_GADGET;
102}
103
104const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
105	.hardware_init = usbhs_rcar2_hardware_init,
106	.hardware_exit = usbhs_rcar2_hardware_exit,
107	.power_ctrl = usbhs_rcar2_power_ctrl,
108	.get_id = usbhs_rcar2_get_id,
109};
110