1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (c) 2017 NXP. */
#include <common.h>
#include <init.h>
#include <io.h>
#include <of.h>
#include <errno.h>
#include <driver.h>
#include <malloc.h>
#include <usb/phy.h>
#include <linux/phy/phy.h>
#include <linux/clk.h>
#include <linux/err.h>
#define PHY_CTRL0 0x0
#define PHY_CTRL0_REF_SSP_EN BIT(2)
#define PHY_CTRL1 0x4
#define PHY_CTRL1_RESET BIT(0)
#define PHY_CTRL1_COMMONONN BIT(1)
#define PHY_CTRL1_ATERESET BIT(3)
#define PHY_CTRL1_VDATSRCENB0 BIT(19)
#define PHY_CTRL1_VDATDETENB0 BIT(20)
#define PHY_CTRL2 0x8
#define PHY_CTRL2_TXENABLEN0 BIT(8)
struct imx8mq_usb_phy {
struct phy *phy;
struct clk *clk;
void __iomem *base;
};
static int imx8mq_usb_phy_init(struct phy *phy)
{
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
u32 value;
value = readl(imx_phy->base + PHY_CTRL1);
value &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0 |
PHY_CTRL1_COMMONONN);
value |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET;
writel(value, imx_phy->base + PHY_CTRL1);
value = readl(imx_phy->base + PHY_CTRL0);
value |= PHY_CTRL0_REF_SSP_EN;
writel(value, imx_phy->base + PHY_CTRL0);
value = readl(imx_phy->base + PHY_CTRL2);
value |= PHY_CTRL2_TXENABLEN0;
writel(value, imx_phy->base + PHY_CTRL2);
value = readl(imx_phy->base + PHY_CTRL1);
value &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET);
writel(value, imx_phy->base + PHY_CTRL1);
return 0;
}
static int imx8mq_phy_power_on(struct phy *phy)
{
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
return clk_enable(imx_phy->clk);
}
static int imx8mq_phy_power_off(struct phy *phy)
{
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
clk_disable(imx_phy->clk);
return 0;
}
static struct phy_ops imx8mq_usb_phy_ops = {
.init = imx8mq_usb_phy_init,
.power_on = imx8mq_phy_power_on,
.power_off = imx8mq_phy_power_off,
};
static struct phy *imx8mq_usb_phy_xlate(struct device_d *dev,
struct of_phandle_args *args)
{
struct imx8mq_usb_phy *imx_phy = dev->priv;
return imx_phy->phy;
}
static int imx8mq_usb_phy_probe(struct device_d *dev)
{
struct phy_provider *phy_provider;
struct imx8mq_usb_phy *imx_phy;
imx_phy = xzalloc(sizeof(*imx_phy));
dev->priv = imx_phy;
imx_phy->clk = clk_get(dev, "phy");
if (IS_ERR(imx_phy->clk))
return PTR_ERR(imx_phy->clk);
imx_phy->base = dev_get_mem_region(dev, 0);
if (IS_ERR(imx_phy->base))
return PTR_ERR(imx_phy->base);
imx_phy->phy = phy_create(dev, NULL, &imx8mq_usb_phy_ops, NULL);
if (IS_ERR(imx_phy->phy))
return PTR_ERR(imx_phy->phy);
phy_set_drvdata(imx_phy->phy, imx_phy);
phy_provider = of_phy_provider_register(dev, imx8mq_usb_phy_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
static const struct of_device_id imx8mq_usb_phy_of_match[] = {
{.compatible = "fsl,imx8mq-usb-phy",},
{ },
};
static struct driver_d imx8mq_usb_phy_driver = {
.name = "imx8mq-usb-phy",
.probe = imx8mq_usb_phy_probe,
.of_compatible = DRV_OF_COMPAT(imx8mq_usb_phy_of_match),
};
device_platform_driver(imx8mq_usb_phy_driver);
|
