1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) 2015 Linaro Ltd. |
4 | * Copyright (c) 2015 HiSilicon Limited. |
5 | */ |
6 | |
7 | #include <linux/mfd/syscon.h> |
8 | #include <linux/mod_devicetable.h> |
9 | #include <linux/module.h> |
10 | #include <linux/platform_device.h> |
11 | #include <linux/phy/phy.h> |
12 | #include <linux/regmap.h> |
13 | |
14 | #define SC_PERIPH_CTRL4 0x00c |
15 | |
16 | #define CTRL4_PICO_SIDDQ BIT(6) |
17 | #define CTRL4_PICO_OGDISABLE BIT(8) |
18 | #define CTRL4_PICO_VBUSVLDEXT BIT(10) |
19 | #define CTRL4_PICO_VBUSVLDEXTSEL BIT(11) |
20 | #define CTRL4_OTG_PHY_SEL BIT(21) |
21 | |
22 | #define SC_PERIPH_CTRL5 0x010 |
23 | |
24 | #define CTRL5_USBOTG_RES_SEL BIT(3) |
25 | #define CTRL5_PICOPHY_ACAENB BIT(4) |
26 | #define CTRL5_PICOPHY_BC_MODE BIT(5) |
27 | #define CTRL5_PICOPHY_CHRGSEL BIT(6) |
28 | #define CTRL5_PICOPHY_VDATSRCEND BIT(7) |
29 | #define CTRL5_PICOPHY_VDATDETENB BIT(8) |
30 | #define CTRL5_PICOPHY_DCDENB BIT(9) |
31 | #define CTRL5_PICOPHY_IDDIG BIT(10) |
32 | |
33 | #define SC_PERIPH_CTRL8 0x018 |
34 | #define SC_PERIPH_RSTEN0 0x300 |
35 | #define SC_PERIPH_RSTDIS0 0x304 |
36 | |
37 | #define RST0_USBOTG_BUS BIT(4) |
38 | #define RST0_POR_PICOPHY BIT(5) |
39 | #define RST0_USBOTG BIT(6) |
40 | #define RST0_USBOTG_32K BIT(7) |
41 | |
42 | #define EYE_PATTERN_PARA 0x7053348c |
43 | |
44 | struct hi6220_priv { |
45 | struct regmap *reg; |
46 | struct device *dev; |
47 | }; |
48 | |
49 | static void hi6220_phy_init(struct hi6220_priv *priv) |
50 | { |
51 | struct regmap *reg = priv->reg; |
52 | u32 val, mask; |
53 | |
54 | val = RST0_USBOTG_BUS | RST0_POR_PICOPHY | |
55 | RST0_USBOTG | RST0_USBOTG_32K; |
56 | mask = val; |
57 | regmap_update_bits(map: reg, SC_PERIPH_RSTEN0, mask, val); |
58 | regmap_update_bits(map: reg, SC_PERIPH_RSTDIS0, mask, val); |
59 | } |
60 | |
61 | static int hi6220_phy_setup(struct hi6220_priv *priv, bool on) |
62 | { |
63 | struct regmap *reg = priv->reg; |
64 | u32 val, mask; |
65 | int ret; |
66 | |
67 | if (on) { |
68 | val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB; |
69 | mask = val | CTRL5_PICOPHY_BC_MODE; |
70 | ret = regmap_update_bits(map: reg, SC_PERIPH_CTRL5, mask, val); |
71 | if (ret) |
72 | goto out; |
73 | |
74 | val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL | |
75 | CTRL4_OTG_PHY_SEL; |
76 | mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE; |
77 | ret = regmap_update_bits(map: reg, SC_PERIPH_CTRL4, mask, val); |
78 | if (ret) |
79 | goto out; |
80 | |
81 | ret = regmap_write(map: reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA); |
82 | if (ret) |
83 | goto out; |
84 | } else { |
85 | val = CTRL4_PICO_SIDDQ; |
86 | mask = val; |
87 | ret = regmap_update_bits(map: reg, SC_PERIPH_CTRL4, mask, val); |
88 | if (ret) |
89 | goto out; |
90 | } |
91 | |
92 | return 0; |
93 | out: |
94 | dev_err(priv->dev, "failed to setup phy ret: %d\n" , ret); |
95 | return ret; |
96 | } |
97 | |
98 | static int hi6220_phy_start(struct phy *phy) |
99 | { |
100 | struct hi6220_priv *priv = phy_get_drvdata(phy); |
101 | |
102 | return hi6220_phy_setup(priv, on: true); |
103 | } |
104 | |
105 | static int hi6220_phy_exit(struct phy *phy) |
106 | { |
107 | struct hi6220_priv *priv = phy_get_drvdata(phy); |
108 | |
109 | return hi6220_phy_setup(priv, on: false); |
110 | } |
111 | |
112 | static const struct phy_ops hi6220_phy_ops = { |
113 | .init = hi6220_phy_start, |
114 | .exit = hi6220_phy_exit, |
115 | .owner = THIS_MODULE, |
116 | }; |
117 | |
118 | static int hi6220_phy_probe(struct platform_device *pdev) |
119 | { |
120 | struct phy_provider *phy_provider; |
121 | struct device *dev = &pdev->dev; |
122 | struct phy *phy; |
123 | struct hi6220_priv *priv; |
124 | |
125 | priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL); |
126 | if (!priv) |
127 | return -ENOMEM; |
128 | |
129 | priv->dev = dev; |
130 | priv->reg = syscon_regmap_lookup_by_phandle(np: dev->of_node, |
131 | property: "hisilicon,peripheral-syscon" ); |
132 | if (IS_ERR(ptr: priv->reg)) { |
133 | dev_err(dev, "no hisilicon,peripheral-syscon\n" ); |
134 | return PTR_ERR(ptr: priv->reg); |
135 | } |
136 | |
137 | hi6220_phy_init(priv); |
138 | |
139 | phy = devm_phy_create(dev, NULL, ops: &hi6220_phy_ops); |
140 | if (IS_ERR(ptr: phy)) |
141 | return PTR_ERR(ptr: phy); |
142 | |
143 | phy_set_drvdata(phy, data: priv); |
144 | phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); |
145 | return PTR_ERR_OR_ZERO(ptr: phy_provider); |
146 | } |
147 | |
148 | static const struct of_device_id hi6220_phy_of_match[] = { |
149 | {.compatible = "hisilicon,hi6220-usb-phy" ,}, |
150 | { }, |
151 | }; |
152 | MODULE_DEVICE_TABLE(of, hi6220_phy_of_match); |
153 | |
154 | static struct platform_driver hi6220_phy_driver = { |
155 | .probe = hi6220_phy_probe, |
156 | .driver = { |
157 | .name = "hi6220-usb-phy" , |
158 | .of_match_table = hi6220_phy_of_match, |
159 | } |
160 | }; |
161 | module_platform_driver(hi6220_phy_driver); |
162 | |
163 | MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver" ); |
164 | MODULE_ALIAS("platform:hi6220-usb-phy" ); |
165 | MODULE_LICENSE("GPL" ); |
166 | |