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
usbhs_rcar2_hardware_init(struct platform_device * pdev)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
usbhs_rcar2_hardware_exit(struct platform_device * pdev)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
usbhs_rcar2_power_ctrl(struct platform_device * pdev,void __iomem * base,int enable)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