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 "common.h"
12 #include "rcar2.h"
13 
14 static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
15 {
16 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
17 
18 	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
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 
28 	return -ENXIO;
29 }
30 
31 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
32 {
33 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
34 
35 	if (priv->phy) {
36 		phy_put(priv->phy);
37 		priv->phy = NULL;
38 	}
39 
40 	return 0;
41 }
42 
43 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
44 				void __iomem *base, int enable)
45 {
46 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
47 	int retval = -ENODEV;
48 
49 	if (priv->phy) {
50 		if (enable) {
51 			retval = phy_init(priv->phy);
52 
53 			if (!retval)
54 				retval = phy_power_on(priv->phy);
55 		} else {
56 			phy_power_off(priv->phy);
57 			phy_exit(priv->phy);
58 			retval = 0;
59 		}
60 	}
61 
62 	return retval;
63 }
64 
65 static int usbhs_rcar2_get_id(struct platform_device *pdev)
66 {
67 	return USBHS_GADGET;
68 }
69 
70 const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
71 	.hardware_init = usbhs_rcar2_hardware_init,
72 	.hardware_exit = usbhs_rcar2_hardware_exit,
73 	.power_ctrl = usbhs_rcar2_power_ctrl,
74 	.get_id = usbhs_rcar2_get_id,
75 };
76