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/gpio.h>
10 #include <linux/of_gpio.h>
11 #include <linux/phy/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 	return -ENXIO;
30 }
31 
32 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
33 {
34 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
35 
36 	if (priv->phy) {
37 		phy_put(priv->phy);
38 		priv->phy = NULL;
39 	}
40 
41 	return 0;
42 }
43 
44 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
45 				void __iomem *base, int enable)
46 {
47 	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
48 	int retval = -ENODEV;
49 
50 	if (priv->phy) {
51 		if (enable) {
52 			retval = phy_init(priv->phy);
53 
54 			if (!retval)
55 				retval = phy_power_on(priv->phy);
56 		} else {
57 			phy_power_off(priv->phy);
58 			phy_exit(priv->phy);
59 			retval = 0;
60 		}
61 	}
62 
63 	return retval;
64 }
65 
66 const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
67 	.platform_callback = {
68 		.hardware_init = usbhs_rcar2_hardware_init,
69 		.hardware_exit = usbhs_rcar2_hardware_exit,
70 		.power_ctrl = usbhs_rcar2_power_ctrl,
71 		.get_id = usbhs_get_id_as_gadget,
72 	},
73 	.driver_param = {
74 		.has_usb_dmac = 1,
75 		.has_new_pipe_configs = 1,
76 	},
77 };
78