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  */
7 
8 #include <linux/gpio.h>
9 #include <linux/of_gpio.h>
10 #include <linux/phy/phy.h>
11 #include <linux/usb/phy.h>
12 #include "common.h"
13 #include "rcar2.h"
14 
15 static 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 	if (IS_ENABLED(CONFIG_USB_PHY)) {
30 		struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
31 
32 		if (IS_ERR(usb_phy))
33 			return PTR_ERR(usb_phy);
34 
35 		priv->usb_phy = usb_phy;
36 		return 0;
37 	}
38 
39 	return -ENXIO;
40 }
41 
42 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
43 {
44 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
45 
46 	if (priv->phy) {
47 		phy_put(priv->phy);
48 		priv->phy = NULL;
49 	}
50 
51 	if (priv->usb_phy) {
52 		usb_put_phy(priv->usb_phy);
53 		priv->usb_phy = NULL;
54 	}
55 
56 	return 0;
57 }
58 
59 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
60 				void __iomem *base, int enable)
61 {
62 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
63 	int retval = -ENODEV;
64 
65 	if (priv->phy) {
66 		if (enable) {
67 			retval = phy_init(priv->phy);
68 
69 			if (!retval)
70 				retval = phy_power_on(priv->phy);
71 		} else {
72 			phy_power_off(priv->phy);
73 			phy_exit(priv->phy);
74 			retval = 0;
75 		}
76 	}
77 
78 	if (priv->usb_phy) {
79 		if (enable) {
80 			retval = usb_phy_init(priv->usb_phy);
81 
82 			if (!retval)
83 				retval = usb_phy_set_suspend(priv->usb_phy, 0);
84 		} else {
85 			usb_phy_set_suspend(priv->usb_phy, 1);
86 			usb_phy_shutdown(priv->usb_phy);
87 			retval = 0;
88 		}
89 	}
90 
91 	return retval;
92 }
93 
94 static int usbhs_rcar2_get_id(struct platform_device *pdev)
95 {
96 	return USBHS_GADGET;
97 }
98 
99 const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
100 	.hardware_init = usbhs_rcar2_hardware_init,
101 	.hardware_exit = usbhs_rcar2_hardware_exit,
102 	.power_ctrl = usbhs_rcar2_power_ctrl,
103 	.get_id = usbhs_rcar2_get_id,
104 };
105