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  * Copyright (C) 2019 Renesas Electronics Corporation
7  */
8 
9 #include <linux/phy/phy.h>
10 #include "common.h"
11 #include "rcar2.h"
12 
13 static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
14 {
15 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
16 
17 	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
18 		struct phy *phy = phy_get(&pdev->dev, "usb");
19 
20 		if (IS_ERR(phy))
21 			return PTR_ERR(phy);
22 
23 		priv->phy = phy;
24 		return 0;
25 	}
26 
27 	return -ENXIO;
28 }
29 
30 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
31 {
32 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
33 
34 	if (priv->phy) {
35 		phy_put(&pdev->dev, priv->phy);
36 		priv->phy = NULL;
37 	}
38 
39 	return 0;
40 }
41 
42 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
43 				void __iomem *base, int enable)
44 {
45 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
46 	int retval = -ENODEV;
47 
48 	if (priv->phy) {
49 		if (enable) {
50 			retval = phy_init(priv->phy);
51 
52 			if (!retval)
53 				retval = phy_power_on(priv->phy);
54 		} else {
55 			phy_power_off(priv->phy);
56 			phy_exit(priv->phy);
57 			retval = 0;
58 		}
59 	}
60 
61 	return retval;
62 }
63 
64 const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
65 	.platform_callback = {
66 		.hardware_init = usbhs_rcar2_hardware_init,
67 		.hardware_exit = usbhs_rcar2_hardware_exit,
68 		.power_ctrl = usbhs_rcar2_power_ctrl,
69 		.get_id = usbhs_get_id_as_gadget,
70 	},
71 	.driver_param = {
72 		.has_usb_dmac = 1,
73 		.has_new_pipe_configs = 1,
74 	},
75 };
76