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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
// SPDX-License-Identifier: GPL-2.0
/*
* Phy provider for USB 3.0 controller on HiSilicon 3660 platform
*
* Copyright (C) 2017-2018 Hilisicon Electronics Co., Ltd.
* http://www.huawei.com
*
* Authors: Yu Chen <chenyu56@huawei.com>
*/
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#define PERI_CRG_CLK_EN4 0x40
#define PERI_CRG_CLK_DIS4 0x44
#define GT_CLK_USB3OTG_REF BIT(0)
#define GT_ACLK_USB3OTG BIT(1)
#define PERI_CRG_RSTEN4 0x90
#define PERI_CRG_RSTDIS4 0x94
#define IP_RST_USB3OTGPHY_POR BIT(3)
#define IP_RST_USB3OTG BIT(5)
#define PERI_CRG_ISODIS 0x148
#define USB_REFCLK_ISO_EN BIT(25)
#define PCTRL_PERI_CTRL3 0x10
#define PCTRL_PERI_CTRL3_MSK_START 16
#define USB_TCXO_EN BIT(1)
#define PCTRL_PERI_CTRL24 0x64
#define SC_CLK_USB3PHY_3MUX1_SEL BIT(25)
#define USBOTG3_CTRL0 0x00
#define SC_USB3PHY_ABB_GT_EN BIT(15)
#define USBOTG3_CTRL2 0x08
#define USBOTG3CTRL2_POWERDOWN_HSP BIT(0)
#define USBOTG3CTRL2_POWERDOWN_SSP BIT(1)
#define USBOTG3_CTRL3 0x0C
#define USBOTG3_CTRL3_VBUSVLDEXT BIT(6)
#define USBOTG3_CTRL3_VBUSVLDEXTSEL BIT(5)
#define USBOTG3_CTRL4 0x10
#define USBOTG3_CTRL7 0x1c
#define REF_SSP_EN BIT(16)
/* This value config the default txtune parameter of the usb 2.0 phy */
#define HI3660_USB_DEFAULT_PHY_PARAM 0x1c466e3
struct hi3660_priv {
struct device *dev;
struct regmap *peri_crg;
struct regmap *pctrl;
struct regmap *otg_bc;
u32 eye_diagram_param;
};
static int hi3660_phy_init(struct phy *phy)
{
struct hi3660_priv *priv = phy_get_drvdata(phy);
u32 val, mask;
int ret;
/* usb refclk iso disable */
ret = regmap_write(priv->peri_crg, PERI_CRG_ISODIS, USB_REFCLK_ISO_EN);
if (ret)
goto out;
/* enable usb_tcxo_en */
val = USB_TCXO_EN | (USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START);
ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3, val);
if (ret)
goto out;
/* assert phy */
val = IP_RST_USB3OTGPHY_POR | IP_RST_USB3OTG;
ret = regmap_write(priv->peri_crg, PERI_CRG_RSTEN4, val);
if (ret)
goto out;
/* enable phy ref clk */
val = SC_USB3PHY_ABB_GT_EN;
mask = val;
ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL0, mask, val);
if (ret)
goto out;
val = REF_SSP_EN;
mask = val;
ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL7, mask, val);
if (ret)
goto out;
/* exit from IDDQ mode */
mask = USBOTG3CTRL2_POWERDOWN_HSP | USBOTG3CTRL2_POWERDOWN_SSP;
ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL2, mask, 0);
if (ret)
goto out;
/* delay for exit from IDDQ mode */
usleep_range(100, 120);
/* deassert phy */
val = IP_RST_USB3OTGPHY_POR | IP_RST_USB3OTG;
ret = regmap_write(priv->peri_crg, PERI_CRG_RSTDIS4, val);
if (ret)
goto out;
/* delay for phy deasserted */
usleep_range(10000, 15000);
/* fake vbus valid signal */
val = USBOTG3_CTRL3_VBUSVLDEXT | USBOTG3_CTRL3_VBUSVLDEXTSEL;
mask = val;
ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL3, mask, val);
if (ret)
goto out;
/* delay for vbus valid */
usleep_range(100, 120);
ret = regmap_write(priv->otg_bc, USBOTG3_CTRL4,
priv->eye_diagram_param);
if (ret)
goto out;
return 0;
out:
dev_err(priv->dev, "failed to init phy ret: %d\n", ret);
return ret;
}
static int hi3660_phy_exit(struct phy *phy)
{
struct hi3660_priv *priv = phy_get_drvdata(phy);
u32 val;
int ret;
/* assert phy */
val = IP_RST_USB3OTGPHY_POR;
ret = regmap_write(priv->peri_crg, PERI_CRG_RSTEN4, val);
if (ret)
goto out;
/* disable usb_tcxo_en */
val = USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START;
ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3, val);
if (ret)
goto out;
return 0;
out:
dev_err(priv->dev, "failed to exit phy ret: %d\n", ret);
return ret;
}
static struct phy_ops hi3660_phy_ops = {
.init = hi3660_phy_init,
.exit = hi3660_phy_exit,
.owner = THIS_MODULE,
};
static int hi3660_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
struct phy *phy;
struct hi3660_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
priv->peri_crg = syscon_regmap_lookup_by_phandle(dev->of_node,
"hisilicon,pericrg-syscon");
if (IS_ERR(priv->peri_crg)) {
dev_err(dev, "no hisilicon,pericrg-syscon\n");
return PTR_ERR(priv->peri_crg);
}
priv->pctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
"hisilicon,pctrl-syscon");
if (IS_ERR(priv->pctrl)) {
dev_err(dev, "no hisilicon,pctrl-syscon\n");
return PTR_ERR(priv->pctrl);
}
/* node of hi3660 phy is a sub-node of usb3_otg_bc */
priv->otg_bc = syscon_node_to_regmap(dev->parent->of_node);
if (IS_ERR(priv->otg_bc)) {
dev_err(dev, "no hisilicon,usb3-otg-bc-syscon\n");
return PTR_ERR(priv->otg_bc);
}
if (of_property_read_u32(dev->of_node, "hisilicon,eye-diagram-param",
&(priv->eye_diagram_param)))
priv->eye_diagram_param = HI3660_USB_DEFAULT_PHY_PARAM;
phy = devm_phy_create(dev, NULL, &hi3660_phy_ops);
if (IS_ERR(phy))
return PTR_ERR(phy);
phy_set_drvdata(phy, priv);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
static const struct of_device_id hi3660_phy_of_match[] = {
{.compatible = "hisilicon,hi3660-usb-phy",},
{ }
};
MODULE_DEVICE_TABLE(of, hi3660_phy_of_match);
static struct platform_driver hi3660_phy_driver = {
.probe = hi3660_phy_probe,
.driver = {
.name = "hi3660-usb-phy",
.of_match_table = hi3660_phy_of_match,
}
};
module_platform_driver(hi3660_phy_driver);
MODULE_AUTHOR("Yu Chen <chenyu56@huawei.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Hilisicon Hi3660 USB3 PHY Driver");
|
