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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
*/
#include <common.h>
#include <log.h>
#include <asm/io.h>
#include <bitfield.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <generic-phy.h>
#include <linux/libfdt.h>
#include <regmap.h>
#include <reset-uclass.h>
#include <syscon.h>
#include <wait_bit.h>
#include <linux/bitops.h>
#include <linux/compat.h>
DECLARE_GLOBAL_DATA_PTR;
/* Default PHY_SEL and REFCLKSEL configuration */
#define STIH407_USB_PICOPHY_CTRL_PORT_CONF 0x6
/* ports parameters overriding */
#define STIH407_USB_PICOPHY_PARAM_DEF 0x39a4dc
#define PHYPARAM_REG 1
#define PHYCTRL_REG 2
#define PHYPARAM_NB 3
struct sti_usb_phy {
struct regmap *regmap;
struct reset_ctl global_ctl;
struct reset_ctl port_ctl;
int param;
int ctrl;
};
static int sti_usb_phy_deassert(struct sti_usb_phy *phy)
{
int ret;
ret = reset_deassert(&phy->global_ctl);
if (ret < 0) {
pr_err("PHY global deassert failed: %d", ret);
return ret;
}
ret = reset_deassert(&phy->port_ctl);
if (ret < 0)
pr_err("PHY port deassert failed: %d", ret);
return ret;
}
static int sti_usb_phy_init(struct phy *usb_phy)
{
struct udevice *dev = usb_phy->dev;
struct sti_usb_phy *phy = dev_get_priv(dev);
void __iomem *reg;
/* set ctrl picophy value */
reg = (void __iomem *)phy->regmap->ranges[0].start + phy->ctrl;
/* CTRL_PORT mask is 0x1f */
clrsetbits_le32(reg, 0x1f, STIH407_USB_PICOPHY_CTRL_PORT_CONF);
/* set ports parameters overriding */
reg = (void __iomem *)phy->regmap->ranges[0].start + phy->param;
/* PARAM_DEF mask is 0xffffffff */
clrsetbits_le32(reg, 0xffffffff, STIH407_USB_PICOPHY_PARAM_DEF);
return sti_usb_phy_deassert(phy);
}
static int sti_usb_phy_exit(struct phy *usb_phy)
{
struct udevice *dev = usb_phy->dev;
struct sti_usb_phy *phy = dev_get_priv(dev);
int ret;
ret = reset_assert(&phy->port_ctl);
if (ret < 0) {
pr_err("PHY port assert failed: %d", ret);
return ret;
}
ret = reset_assert(&phy->global_ctl);
if (ret < 0)
pr_err("PHY global assert failed: %d", ret);
return ret;
}
struct phy_ops sti_usb_phy_ops = {
.init = sti_usb_phy_init,
.exit = sti_usb_phy_exit,
};
int sti_usb_phy_probe(struct udevice *dev)
{
struct sti_usb_phy *priv = dev_get_priv(dev);
struct udevice *syscon;
struct ofnode_phandle_args syscfg_phandle;
u32 cells[PHYPARAM_NB];
int ret, count;
/* get corresponding syscon phandle */
ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0,
&syscfg_phandle);
if (ret < 0) {
pr_err("Can't get syscfg phandle: %d\n", ret);
return ret;
}
ret = uclass_get_device_by_ofnode(UCLASS_SYSCON, syscfg_phandle.node,
&syscon);
if (ret) {
pr_err("unable to find syscon device (%d)\n", ret);
return ret;
}
priv->regmap = syscon_get_regmap(syscon);
if (!priv->regmap) {
pr_err("unable to find regmap\n");
return -ENODEV;
}
/* get phy param offset */
count = fdtdec_get_int_array_count(gd->fdt_blob, dev_of_offset(dev),
"st,syscfg", cells,
ARRAY_SIZE(cells));
if (count < 0) {
pr_err("Bad PHY st,syscfg property %d\n", count);
return -EINVAL;
}
if (count > PHYPARAM_NB) {
pr_err("Unsupported PHY param count %d\n", count);
return -EINVAL;
}
priv->param = cells[PHYPARAM_REG];
priv->ctrl = cells[PHYCTRL_REG];
/* get global reset control */
ret = reset_get_by_name(dev, "global", &priv->global_ctl);
if (ret) {
pr_err("can't get global reset for %s (%d)", dev->name, ret);
return ret;
}
/* get port reset control */
ret = reset_get_by_name(dev, "port", &priv->port_ctl);
if (ret) {
pr_err("can't get port reset for %s (%d)", dev->name, ret);
return ret;
}
return 0;
}
static const struct udevice_id sti_usb_phy_ids[] = {
{ .compatible = "st,stih407-usb2-phy" },
{ }
};
U_BOOT_DRIVER(sti_usb_phy) = {
.name = "sti_usb_phy",
.id = UCLASS_PHY,
.of_match = sti_usb_phy_ids,
.probe = sti_usb_phy_probe,
.ops = &sti_usb_phy_ops,
.priv_auto_alloc_size = sizeof(struct sti_usb_phy),
};
|
