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
17 struct mt7620_usb_phy {
18 struct udevice *sysc;
19 struct clk_bulk clocks;
20 struct reset_ctl_bulk resets;
21 };
22
mt7620_usb_phy_power_on(struct phy * _phy)23 static 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
mt7620_usb_phy_power_off(struct phy * _phy)47 static 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
mt7620_usb_phy_probe(struct udevice * dev)58 static 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
93 static 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
98 static const struct udevice_id mt7620_usb_phy_ids[] = {
99 { .compatible = "mediatek,mt7620-usbphy" },
100 { }
101 };
102
103 U_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