1
2
3
4
5
6
7
8
9
10
11#include <linux/mfd/syscon.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/phy/phy.h>
15#include <linux/regmap.h>
16
17#define SC_PERIPH_CTRL4 0x00c
18
19#define CTRL4_PICO_SIDDQ BIT(6)
20#define CTRL4_PICO_OGDISABLE BIT(8)
21#define CTRL4_PICO_VBUSVLDEXT BIT(10)
22#define CTRL4_PICO_VBUSVLDEXTSEL BIT(11)
23#define CTRL4_OTG_PHY_SEL BIT(21)
24
25#define SC_PERIPH_CTRL5 0x010
26
27#define CTRL5_USBOTG_RES_SEL BIT(3)
28#define CTRL5_PICOPHY_ACAENB BIT(4)
29#define CTRL5_PICOPHY_BC_MODE BIT(5)
30#define CTRL5_PICOPHY_CHRGSEL BIT(6)
31#define CTRL5_PICOPHY_VDATSRCEND BIT(7)
32#define CTRL5_PICOPHY_VDATDETENB BIT(8)
33#define CTRL5_PICOPHY_DCDENB BIT(9)
34#define CTRL5_PICOPHY_IDDIG BIT(10)
35
36#define SC_PERIPH_CTRL8 0x018
37#define SC_PERIPH_RSTEN0 0x300
38#define SC_PERIPH_RSTDIS0 0x304
39
40#define RST0_USBOTG_BUS BIT(4)
41#define RST0_POR_PICOPHY BIT(5)
42#define RST0_USBOTG BIT(6)
43#define RST0_USBOTG_32K BIT(7)
44
45#define EYE_PATTERN_PARA 0x7053348c
46
47struct hi6220_priv {
48 struct regmap *reg;
49 struct device *dev;
50};
51
52static void hi6220_phy_init(struct hi6220_priv *priv)
53{
54 struct regmap *reg = priv->reg;
55 u32 val, mask;
56
57 val = RST0_USBOTG_BUS | RST0_POR_PICOPHY |
58 RST0_USBOTG | RST0_USBOTG_32K;
59 mask = val;
60 regmap_update_bits(reg, SC_PERIPH_RSTEN0, mask, val);
61 regmap_update_bits(reg, SC_PERIPH_RSTDIS0, mask, val);
62}
63
64static int hi6220_phy_setup(struct hi6220_priv *priv, bool on)
65{
66 struct regmap *reg = priv->reg;
67 u32 val, mask;
68 int ret;
69
70 if (on) {
71 val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB;
72 mask = val | CTRL5_PICOPHY_BC_MODE;
73 ret = regmap_update_bits(reg, SC_PERIPH_CTRL5, mask, val);
74 if (ret)
75 goto out;
76
77 val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL |
78 CTRL4_OTG_PHY_SEL;
79 mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE;
80 ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
81 if (ret)
82 goto out;
83
84 ret = regmap_write(reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA);
85 if (ret)
86 goto out;
87 } else {
88 val = CTRL4_PICO_SIDDQ;
89 mask = val;
90 ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
91 if (ret)
92 goto out;
93 }
94
95 return 0;
96out:
97 dev_err(priv->dev, "failed to setup phy ret: %d\n", ret);
98 return ret;
99}
100
101static int hi6220_phy_start(struct phy *phy)
102{
103 struct hi6220_priv *priv = phy_get_drvdata(phy);
104
105 return hi6220_phy_setup(priv, true);
106}
107
108static int hi6220_phy_exit(struct phy *phy)
109{
110 struct hi6220_priv *priv = phy_get_drvdata(phy);
111
112 return hi6220_phy_setup(priv, false);
113}
114
115static const struct phy_ops hi6220_phy_ops = {
116 .init = hi6220_phy_start,
117 .exit = hi6220_phy_exit,
118 .owner = THIS_MODULE,
119};
120
121static int hi6220_phy_probe(struct platform_device *pdev)
122{
123 struct phy_provider *phy_provider;
124 struct device *dev = &pdev->dev;
125 struct phy *phy;
126 struct hi6220_priv *priv;
127
128 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
129 if (!priv)
130 return -ENOMEM;
131
132 priv->dev = dev;
133 priv->reg = syscon_regmap_lookup_by_phandle(dev->of_node,
134 "hisilicon,peripheral-syscon");
135 if (IS_ERR(priv->reg)) {
136 dev_err(dev, "no hisilicon,peripheral-syscon\n");
137 return PTR_ERR(priv->reg);
138 }
139
140 hi6220_phy_init(priv);
141
142 phy = devm_phy_create(dev, NULL, &hi6220_phy_ops);
143 if (IS_ERR(phy))
144 return PTR_ERR(phy);
145
146 phy_set_drvdata(phy, priv);
147 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
148 return PTR_ERR_OR_ZERO(phy_provider);
149}
150
151static const struct of_device_id hi6220_phy_of_match[] = {
152 {.compatible = "hisilicon,hi6220-usb-phy",},
153 { },
154};
155MODULE_DEVICE_TABLE(of, hi6220_phy_of_match);
156
157static struct platform_driver hi6220_phy_driver = {
158 .probe = hi6220_phy_probe,
159 .driver = {
160 .name = "hi6220-usb-phy",
161 .of_match_table = hi6220_phy_of_match,
162 }
163};
164module_platform_driver(hi6220_phy_driver);
165
166MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver");
167MODULE_ALIAS("platform:hi6220-usb-phy");
168MODULE_LICENSE("GPL");
169
