Commit | Line | Data |
---|---|---|
30e9a0b2 ZG |
1 | /* |
2 | * Copyright (c) 2015 Linaro Ltd. | |
3 | * Copyright (c) 2015 Hisilicon Limited. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
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 | ||
47 | struct hi6220_priv { | |
48 | struct regmap *reg; | |
49 | struct device *dev; | |
50 | }; | |
51 | ||
52 | static 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 | ||
64 | static 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; | |
96 | out: | |
97 | dev_err(priv->dev, "failed to setup phy ret: %d\n", ret); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | static 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 | ||
108 | static 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 | ||
115 | static struct phy_ops hi6220_phy_ops = { | |
116 | .init = hi6220_phy_start, | |
117 | .exit = hi6220_phy_exit, | |
118 | .owner = THIS_MODULE, | |
119 | }; | |
120 | ||
121 | static 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 | ||
151 | static const struct of_device_id hi6220_phy_of_match[] = { | |
152 | {.compatible = "hisilicon,hi6220-usb-phy",}, | |
153 | { }, | |
154 | }; | |
155 | MODULE_DEVICE_TABLE(of, hi6220_phy_of_match); | |
156 | ||
157 | static 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 | }; | |
164 | module_platform_driver(hi6220_phy_driver); | |
165 | ||
166 | MODULE_DESCRIPTION("HISILICON HI6220 USB PHY driver"); | |
167 | MODULE_ALIAS("platform:hi6220-usb-phy"); | |
168 | MODULE_LICENSE("GPL"); |