1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2020 MediaTek Inc. All Rights Reserved.
4 *
5 * Author: Weijie Gao <weijie.gao@mediatek.com>
6 */
7
8#include <clk.h>
9#include <dm.h>
10#include <generic-phy.h>
11#include <misc.h>
12#include <reset.h>
13#include <dm/device_compat.h>
14#include <linux/delay.h>
15#include <mach/mt7620-sysc.h>
16
17struct mt7620_usb_phy {
18	struct udevice *sysc;
19	struct clk_bulk clocks;
20	struct reset_ctl_bulk resets;
21};
22
23static int mt7620_usb_phy_power_on(struct phy *_phy)
24{
25	struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev);
26	u32 mode = MT7620_SYSC_USB_HOST_MODE;
27	int ret;
28
29	reset_deassert_bulk(&phy->resets);
30
31	clk_enable_bulk(&phy->clocks);
32
33	mdelay(10);
34
35	ret = misc_ioctl(phy->sysc, MT7620_SYSC_IOCTL_SET_USB_MODE, &mode);
36	if (ret) {
37		dev_err(_phy->dev,
38			"mt7620_usbphy: failed to set USB host mode\n");
39		return ret;
40	}
41
42	mdelay(10);
43
44	return 0;
45}
46
47static int mt7620_usb_phy_power_off(struct phy *_phy)
48{
49	struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev);
50
51	clk_disable_bulk(&phy->clocks);
52
53	reset_assert_bulk(&phy->resets);
54
55	return 0;
56}
57
58static int mt7620_usb_phy_probe(struct udevice *dev)
59{
60	struct mt7620_usb_phy *phy = dev_get_priv(dev);
61	struct ofnode_phandle_args sysc_args;
62	int ret;
63
64	ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "mediatek,sysc", NULL,
65					     0, 0, &sysc_args);
66	if (ret) {
67		dev_err(dev, "mt7620_usbphy: sysc property not found\n");
68		return ret;
69	}
70
71	ret = uclass_get_device_by_ofnode(UCLASS_MISC, sysc_args.node,
72					  &phy->sysc);
73	if (ret) {
74		dev_err(dev, "mt7620_usbphy: failed to sysc device\n");
75		return ret;
76	}
77
78	ret = clk_get_bulk(dev, &phy->clocks);
79	if (ret) {
80		dev_err(dev, "mt7620_usbphy: failed to get clocks\n");
81		return ret;
82	}
83
84	ret = reset_get_bulk(dev, &phy->resets);
85	if (ret) {
86		dev_err(dev, "mt7620_usbphy: failed to get reset control\n");
87		return ret;
88	}
89
90	return 0;
91}
92
93static struct phy_ops mt7620_usb_phy_ops = {
94	.power_on = mt7620_usb_phy_power_on,
95	.power_off = mt7620_usb_phy_power_off,
96};
97
98static const struct udevice_id mt7620_usb_phy_ids[] = {
99	{ .compatible = "mediatek,mt7620-usbphy" },
100	{ }
101};
102
103U_BOOT_DRIVER(mt7620_usb_phy) = {
104	.name		= "mt7620_usb_phy",
105	.id		= UCLASS_PHY,
106	.of_match	= mt7620_usb_phy_ids,
107	.ops		= &mt7620_usb_phy_ops,
108	.probe		= mt7620_usb_phy_probe,
109	.priv_auto	= sizeof(struct mt7620_usb_phy),
110};
111