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f2e60041 DL |
1 | /* |
2 | * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver | |
3 | * | |
4 | * Copyright (C) 2016 David Lechner <david@lechnology.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/clk.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/of.h> | |
19 | #include <linux/mfd/da8xx-cfgchip.h> | |
20 | #include <linux/mfd/syscon.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/phy/phy.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/regmap.h> | |
25 | ||
23e9b38d AB |
26 | #define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) |
27 | ||
f2e60041 DL |
28 | struct da8xx_usb_phy { |
29 | struct phy_provider *phy_provider; | |
30 | struct phy *usb11_phy; | |
31 | struct phy *usb20_phy; | |
32 | struct clk *usb11_clk; | |
33 | struct clk *usb20_clk; | |
34 | struct regmap *regmap; | |
35 | }; | |
36 | ||
37 | static int da8xx_usb11_phy_power_on(struct phy *phy) | |
38 | { | |
39 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); | |
40 | int ret; | |
41 | ||
42 | ret = clk_prepare_enable(d_phy->usb11_clk); | |
43 | if (ret) | |
44 | return ret; | |
45 | ||
46 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, | |
47 | CFGCHIP2_USB1SUSPENDM); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | static int da8xx_usb11_phy_power_off(struct phy *phy) | |
53 | { | |
54 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); | |
55 | ||
56 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0); | |
57 | ||
58 | clk_disable_unprepare(d_phy->usb11_clk); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static const struct phy_ops da8xx_usb11_phy_ops = { | |
64 | .power_on = da8xx_usb11_phy_power_on, | |
65 | .power_off = da8xx_usb11_phy_power_off, | |
66 | .owner = THIS_MODULE, | |
67 | }; | |
68 | ||
69 | static int da8xx_usb20_phy_power_on(struct phy *phy) | |
70 | { | |
71 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); | |
72 | int ret; | |
73 | ||
74 | ret = clk_prepare_enable(d_phy->usb20_clk); | |
75 | if (ret) | |
76 | return ret; | |
77 | ||
78 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static int da8xx_usb20_phy_power_off(struct phy *phy) | |
84 | { | |
85 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); | |
86 | ||
87 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, | |
88 | CFGCHIP2_OTGPWRDN); | |
89 | ||
90 | clk_disable_unprepare(d_phy->usb20_clk); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static int da8xx_usb20_phy_set_mode(struct phy *phy, enum phy_mode mode) | |
96 | { | |
97 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); | |
98 | u32 val; | |
99 | ||
100 | switch (mode) { | |
101 | case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ | |
102 | val = CFGCHIP2_OTGMODE_FORCE_HOST; | |
103 | break; | |
104 | case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ | |
105 | val = CFGCHIP2_OTGMODE_FORCE_DEVICE; | |
106 | break; | |
107 | case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ | |
108 | val = CFGCHIP2_OTGMODE_NO_OVERRIDE; | |
109 | break; | |
110 | default: | |
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, | |
115 | val); | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static const struct phy_ops da8xx_usb20_phy_ops = { | |
121 | .power_on = da8xx_usb20_phy_power_on, | |
122 | .power_off = da8xx_usb20_phy_power_off, | |
123 | .set_mode = da8xx_usb20_phy_set_mode, | |
124 | .owner = THIS_MODULE, | |
125 | }; | |
126 | ||
127 | static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, | |
128 | struct of_phandle_args *args) | |
129 | { | |
130 | struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); | |
131 | ||
132 | if (!d_phy) | |
133 | return ERR_PTR(-ENODEV); | |
134 | ||
135 | switch (args->args[0]) { | |
136 | case 0: | |
137 | return d_phy->usb20_phy; | |
138 | case 1: | |
139 | return d_phy->usb11_phy; | |
140 | default: | |
141 | return ERR_PTR(-EINVAL); | |
142 | } | |
143 | } | |
144 | ||
145 | static int da8xx_usb_phy_probe(struct platform_device *pdev) | |
146 | { | |
147 | struct device *dev = &pdev->dev; | |
148 | struct device_node *node = dev->of_node; | |
149 | struct da8xx_usb_phy *d_phy; | |
150 | ||
151 | d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); | |
152 | if (!d_phy) | |
153 | return -ENOMEM; | |
154 | ||
155 | if (node) | |
156 | d_phy->regmap = syscon_regmap_lookup_by_compatible( | |
157 | "ti,da830-cfgchip"); | |
158 | else | |
4033d952 | 159 | d_phy->regmap = syscon_regmap_lookup_by_pdevname("syscon"); |
f2e60041 DL |
160 | if (IS_ERR(d_phy->regmap)) { |
161 | dev_err(dev, "Failed to get syscon\n"); | |
162 | return PTR_ERR(d_phy->regmap); | |
163 | } | |
164 | ||
165 | d_phy->usb11_clk = devm_clk_get(dev, "usb11_phy"); | |
166 | if (IS_ERR(d_phy->usb11_clk)) { | |
167 | dev_err(dev, "Failed to get usb11_phy clock\n"); | |
168 | return PTR_ERR(d_phy->usb11_clk); | |
169 | } | |
170 | ||
171 | d_phy->usb20_clk = devm_clk_get(dev, "usb20_phy"); | |
172 | if (IS_ERR(d_phy->usb20_clk)) { | |
173 | dev_err(dev, "Failed to get usb20_phy clock\n"); | |
174 | return PTR_ERR(d_phy->usb20_clk); | |
175 | } | |
176 | ||
177 | d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops); | |
178 | if (IS_ERR(d_phy->usb11_phy)) { | |
179 | dev_err(dev, "Failed to create usb11 phy\n"); | |
180 | return PTR_ERR(d_phy->usb11_phy); | |
181 | } | |
182 | ||
183 | d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops); | |
184 | if (IS_ERR(d_phy->usb20_phy)) { | |
185 | dev_err(dev, "Failed to create usb20 phy\n"); | |
186 | return PTR_ERR(d_phy->usb20_phy); | |
187 | } | |
188 | ||
189 | platform_set_drvdata(pdev, d_phy); | |
190 | phy_set_drvdata(d_phy->usb11_phy, d_phy); | |
191 | phy_set_drvdata(d_phy->usb20_phy, d_phy); | |
192 | ||
193 | if (node) { | |
194 | d_phy->phy_provider = devm_of_phy_provider_register(dev, | |
195 | da8xx_usb_phy_of_xlate); | |
196 | if (IS_ERR(d_phy->phy_provider)) { | |
197 | dev_err(dev, "Failed to create phy provider\n"); | |
198 | return PTR_ERR(d_phy->phy_provider); | |
199 | } | |
200 | } else { | |
201 | int ret; | |
202 | ||
76632542 AH |
203 | ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy", |
204 | "ohci-da8xx"); | |
f2e60041 DL |
205 | if (ret) |
206 | dev_warn(dev, "Failed to create usb11 phy lookup\n"); | |
207 | ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy", | |
208 | "musb-da8xx"); | |
209 | if (ret) | |
210 | dev_warn(dev, "Failed to create usb20 phy lookup\n"); | |
211 | } | |
212 | ||
23e9b38d AB |
213 | regmap_write_bits(d_phy->regmap, CFGCHIP(2), |
214 | PHY_INIT_BITS, PHY_INIT_BITS); | |
215 | ||
f2e60041 DL |
216 | return 0; |
217 | } | |
218 | ||
219 | static int da8xx_usb_phy_remove(struct platform_device *pdev) | |
220 | { | |
221 | struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); | |
222 | ||
223 | if (!pdev->dev.of_node) { | |
224 | phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx"); | |
76632542 | 225 | phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx"); |
f2e60041 DL |
226 | } |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static const struct of_device_id da8xx_usb_phy_ids[] = { | |
232 | { .compatible = "ti,da830-usb-phy" }, | |
233 | { } | |
234 | }; | |
235 | MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); | |
236 | ||
237 | static struct platform_driver da8xx_usb_phy_driver = { | |
238 | .probe = da8xx_usb_phy_probe, | |
239 | .remove = da8xx_usb_phy_remove, | |
240 | .driver = { | |
241 | .name = "da8xx-usb-phy", | |
242 | .of_match_table = da8xx_usb_phy_ids, | |
243 | }, | |
244 | }; | |
245 | ||
246 | module_platform_driver(da8xx_usb_phy_driver); | |
247 | ||
248 | MODULE_ALIAS("platform:da8xx-usb-phy"); | |
249 | MODULE_AUTHOR("David Lechner <david@lechnology.com>"); | |
250 | MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); | |
251 | MODULE_LICENSE("GPL v2"); |