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
13static 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
30static 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
42static 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
64const 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};

 
  1/*
  2 * Renesas USB driver R-Car Gen. 2 initialization and power control
  3 *
  4 * Copyright (C) 2014 Ulrich Hecht
  5 *
  6 * This program is distributed in the hope that it will be useful,
  7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  9 * GNU General Public License for more details.
 10 *
 11 */
 12
 13#include <linux/gpio.h>
 14#include <linux/of_gpio.h>
 15#include <linux/phy/phy.h>
 16#include <linux/usb/phy.h>
 17#include "common.h"
 18#include "rcar2.h"
 19
 20static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
 21{
 22	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 23
 24	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
 25		struct phy *phy = phy_get(&pdev->dev, "usb");
 26
 27		if (IS_ERR(phy))
 28			return PTR_ERR(phy);
 29
 30		priv->phy = phy;
 31		return 0;
 32	}
 33
 34	if (IS_ENABLED(CONFIG_USB_PHY)) {
 35		struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
 36
 37		if (IS_ERR(usb_phy))
 38			return PTR_ERR(usb_phy);
 39
 40		priv->usb_phy = usb_phy;
 41		return 0;
 42	}
 43
 44	return -ENXIO;
 45}
 46
 47static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
 48{
 49	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 50
 51	if (priv->phy) {
 52		phy_put(priv->phy);
 53		priv->phy = NULL;
 54	}
 55
 56	if (priv->usb_phy) {
 57		usb_put_phy(priv->usb_phy);
 58		priv->usb_phy = NULL;
 59	}
 60
 61	return 0;
 62}
 63
 64static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
 65				void __iomem *base, int enable)
 66{
 67	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 68	int retval = -ENODEV;
 69
 70	if (priv->phy) {
 71		if (enable) {
 72			retval = phy_init(priv->phy);
 73
 74			if (!retval)
 75				retval = phy_power_on(priv->phy);
 76		} else {
 77			phy_power_off(priv->phy);
 78			phy_exit(priv->phy);
 79			retval = 0;
 80		}
 81	}
 82
 83	if (priv->usb_phy) {
 84		if (enable) {
 85			retval = usb_phy_init(priv->usb_phy);
 86
 87			if (!retval)
 88				retval = usb_phy_set_suspend(priv->usb_phy, 0);
 89		} else {
 90			usb_phy_set_suspend(priv->usb_phy, 1);
 91			usb_phy_shutdown(priv->usb_phy);
 92			retval = 0;
 93		}
 94	}
 95
 96	return retval;
 97}
 98
 99static int usbhs_rcar2_get_id(struct platform_device *pdev)
100{
101	return USBHS_GADGET;
102}
103
104const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
105	.hardware_init = usbhs_rcar2_hardware_init,
106	.hardware_exit = usbhs_rcar2_hardware_exit,
107	.power_ctrl = usbhs_rcar2_power_ctrl,
108	.get_id = usbhs_rcar2_get_id,
 
109};