1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller |
4 | * Copyright 2015-2018 Socionext Inc. |
5 | * Author: |
6 | * Kunihiko Hayashi <hayashi.kunihiko@socionext.com> |
7 | */ |
8 | |
9 | #include <linux/mfd/syscon.h> |
10 | #include <linux/module.h> |
11 | #include <linux/of.h> |
12 | #include <linux/of_platform.h> |
13 | #include <linux/phy/phy.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/regmap.h> |
16 | #include <linux/regulator/consumer.h> |
17 | |
18 | #define SG_USBPHY1CTRL 0x500 |
19 | #define SG_USBPHY1CTRL2 0x504 |
20 | #define SG_USBPHY2CTRL 0x508 |
21 | #define SG_USBPHY2CTRL2 0x50c /* LD11 */ |
22 | #define SG_USBPHY12PLL 0x50c /* Pro4 */ |
23 | #define SG_USBPHY3CTRL 0x510 |
24 | #define SG_USBPHY3CTRL2 0x514 |
25 | #define SG_USBPHY4CTRL 0x518 /* Pro4 */ |
26 | #define SG_USBPHY4CTRL2 0x51c /* Pro4 */ |
27 | #define SG_USBPHY34PLL 0x51c /* Pro4 */ |
28 | |
29 | struct uniphier_u2phy_param { |
30 | u32 offset; |
31 | u32 value; |
32 | }; |
33 | |
34 | struct uniphier_u2phy_soc_data { |
35 | struct uniphier_u2phy_param config0; |
36 | struct uniphier_u2phy_param config1; |
37 | }; |
38 | |
39 | struct uniphier_u2phy_priv { |
40 | struct regmap *regmap; |
41 | struct phy *phy; |
42 | struct regulator *vbus; |
43 | const struct uniphier_u2phy_soc_data *data; |
44 | struct uniphier_u2phy_priv *next; |
45 | }; |
46 | |
47 | static int uniphier_u2phy_power_on(struct phy *phy) |
48 | { |
49 | struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); |
50 | int ret = 0; |
51 | |
52 | if (priv->vbus) |
53 | ret = regulator_enable(regulator: priv->vbus); |
54 | |
55 | return ret; |
56 | } |
57 | |
58 | static int uniphier_u2phy_power_off(struct phy *phy) |
59 | { |
60 | struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); |
61 | |
62 | if (priv->vbus) |
63 | regulator_disable(regulator: priv->vbus); |
64 | |
65 | return 0; |
66 | } |
67 | |
68 | static int uniphier_u2phy_init(struct phy *phy) |
69 | { |
70 | struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); |
71 | |
72 | if (!priv->data) |
73 | return 0; |
74 | |
75 | regmap_write(map: priv->regmap, reg: priv->data->config0.offset, |
76 | val: priv->data->config0.value); |
77 | regmap_write(map: priv->regmap, reg: priv->data->config1.offset, |
78 | val: priv->data->config1.value); |
79 | |
80 | return 0; |
81 | } |
82 | |
83 | static struct phy *uniphier_u2phy_xlate(struct device *dev, |
84 | const struct of_phandle_args *args) |
85 | { |
86 | struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev); |
87 | |
88 | while (priv && args->np != priv->phy->dev.of_node) |
89 | priv = priv->next; |
90 | |
91 | if (!priv) { |
92 | dev_err(dev, "Failed to find appropriate phy\n" ); |
93 | return ERR_PTR(error: -EINVAL); |
94 | } |
95 | |
96 | return priv->phy; |
97 | } |
98 | |
99 | static const struct phy_ops uniphier_u2phy_ops = { |
100 | .init = uniphier_u2phy_init, |
101 | .power_on = uniphier_u2phy_power_on, |
102 | .power_off = uniphier_u2phy_power_off, |
103 | .owner = THIS_MODULE, |
104 | }; |
105 | |
106 | static int uniphier_u2phy_probe(struct platform_device *pdev) |
107 | { |
108 | struct device *dev = &pdev->dev; |
109 | struct device_node *parent, *child; |
110 | struct uniphier_u2phy_priv *priv = NULL, *next = NULL; |
111 | struct phy_provider *phy_provider; |
112 | struct regmap *regmap; |
113 | const struct uniphier_u2phy_soc_data *data; |
114 | int ret, data_idx, ndatas; |
115 | |
116 | data = of_device_get_match_data(dev); |
117 | if (WARN_ON(!data)) |
118 | return -EINVAL; |
119 | |
120 | /* get number of data */ |
121 | for (ndatas = 0; data[ndatas].config0.offset; ndatas++) |
122 | ; |
123 | |
124 | parent = of_get_parent(node: dev->of_node); |
125 | regmap = syscon_node_to_regmap(np: parent); |
126 | of_node_put(node: parent); |
127 | if (IS_ERR(ptr: regmap)) { |
128 | dev_err(dev, "Failed to get regmap\n" ); |
129 | return PTR_ERR(ptr: regmap); |
130 | } |
131 | |
132 | for_each_child_of_node(dev->of_node, child) { |
133 | priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL); |
134 | if (!priv) { |
135 | ret = -ENOMEM; |
136 | goto out_put_child; |
137 | } |
138 | priv->regmap = regmap; |
139 | |
140 | priv->vbus = devm_regulator_get_optional(dev, id: "vbus" ); |
141 | if (IS_ERR(ptr: priv->vbus)) { |
142 | if (PTR_ERR(ptr: priv->vbus) == -EPROBE_DEFER) { |
143 | ret = PTR_ERR(ptr: priv->vbus); |
144 | goto out_put_child; |
145 | } |
146 | priv->vbus = NULL; |
147 | } |
148 | |
149 | priv->phy = devm_phy_create(dev, node: child, ops: &uniphier_u2phy_ops); |
150 | if (IS_ERR(ptr: priv->phy)) { |
151 | dev_err(dev, "Failed to create phy\n" ); |
152 | ret = PTR_ERR(ptr: priv->phy); |
153 | goto out_put_child; |
154 | } |
155 | |
156 | ret = of_property_read_u32(np: child, propname: "reg" , out_value: &data_idx); |
157 | if (ret) { |
158 | dev_err(dev, "Failed to get reg property\n" ); |
159 | goto out_put_child; |
160 | } |
161 | |
162 | if (data_idx < ndatas) |
163 | priv->data = &data[data_idx]; |
164 | else |
165 | dev_warn(dev, "No phy configuration: %s\n" , |
166 | child->full_name); |
167 | |
168 | phy_set_drvdata(phy: priv->phy, data: priv); |
169 | priv->next = next; |
170 | next = priv; |
171 | } |
172 | |
173 | dev_set_drvdata(dev, data: priv); |
174 | phy_provider = devm_of_phy_provider_register(dev, |
175 | uniphier_u2phy_xlate); |
176 | return PTR_ERR_OR_ZERO(ptr: phy_provider); |
177 | |
178 | out_put_child: |
179 | of_node_put(node: child); |
180 | |
181 | return ret; |
182 | } |
183 | |
184 | static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = { |
185 | { |
186 | .config0 = { SG_USBPHY1CTRL, 0x05142400 }, |
187 | .config1 = { SG_USBPHY12PLL, 0x00010010 }, |
188 | }, |
189 | { |
190 | .config0 = { SG_USBPHY2CTRL, 0x05142400 }, |
191 | .config1 = { SG_USBPHY12PLL, 0x00010010 }, |
192 | }, |
193 | { |
194 | .config0 = { SG_USBPHY3CTRL, 0x05142400 }, |
195 | .config1 = { SG_USBPHY34PLL, 0x00010010 }, |
196 | }, |
197 | { |
198 | .config0 = { SG_USBPHY4CTRL, 0x05142400 }, |
199 | .config1 = { SG_USBPHY34PLL, 0x00010010 }, |
200 | }, |
201 | { /* sentinel */ } |
202 | }; |
203 | |
204 | static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = { |
205 | { |
206 | .config0 = { SG_USBPHY1CTRL, 0x82280000 }, |
207 | .config1 = { SG_USBPHY1CTRL2, 0x00000106 }, |
208 | }, |
209 | { |
210 | .config0 = { SG_USBPHY2CTRL, 0x82280000 }, |
211 | .config1 = { SG_USBPHY2CTRL2, 0x00000106 }, |
212 | }, |
213 | { |
214 | .config0 = { SG_USBPHY3CTRL, 0x82280000 }, |
215 | .config1 = { SG_USBPHY3CTRL2, 0x00000106 }, |
216 | }, |
217 | { /* sentinel */ } |
218 | }; |
219 | |
220 | static const struct of_device_id uniphier_u2phy_match[] = { |
221 | { |
222 | .compatible = "socionext,uniphier-pro4-usb2-phy" , |
223 | .data = &uniphier_pro4_data, |
224 | }, |
225 | { |
226 | .compatible = "socionext,uniphier-ld11-usb2-phy" , |
227 | .data = &uniphier_ld11_data, |
228 | }, |
229 | { /* sentinel */ } |
230 | }; |
231 | MODULE_DEVICE_TABLE(of, uniphier_u2phy_match); |
232 | |
233 | static struct platform_driver uniphier_u2phy_driver = { |
234 | .probe = uniphier_u2phy_probe, |
235 | .driver = { |
236 | .name = "uniphier-usb2-phy" , |
237 | .of_match_table = uniphier_u2phy_match, |
238 | }, |
239 | }; |
240 | module_platform_driver(uniphier_u2phy_driver); |
241 | |
242 | MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>" ); |
243 | MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller" ); |
244 | MODULE_LICENSE("GPL v2" ); |
245 | |