1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver |
4 | * |
5 | * Copyright (C) 2016 David Lechner <david@lechnology.com> |
6 | */ |
7 | |
8 | #include <linux/clk.h> |
9 | #include <linux/io.h> |
10 | #include <linux/of.h> |
11 | #include <linux/mfd/da8xx-cfgchip.h> |
12 | #include <linux/mfd/syscon.h> |
13 | #include <linux/module.h> |
14 | #include <linux/phy/phy.h> |
15 | #include <linux/platform_data/phy-da8xx-usb.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regmap.h> |
18 | |
19 | #define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) |
20 | |
21 | struct da8xx_usb_phy { |
22 | struct phy_provider *phy_provider; |
23 | struct phy *usb11_phy; |
24 | struct phy *usb20_phy; |
25 | struct clk *usb11_clk; |
26 | struct clk *usb20_clk; |
27 | struct regmap *regmap; |
28 | }; |
29 | |
30 | static int da8xx_usb11_phy_power_on(struct phy *phy) |
31 | { |
32 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
33 | int ret; |
34 | |
35 | ret = clk_prepare_enable(clk: d_phy->usb11_clk); |
36 | if (ret) |
37 | return ret; |
38 | |
39 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, |
40 | CFGCHIP2_USB1SUSPENDM); |
41 | |
42 | return 0; |
43 | } |
44 | |
45 | static int da8xx_usb11_phy_power_off(struct phy *phy) |
46 | { |
47 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
48 | |
49 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, val: 0); |
50 | |
51 | clk_disable_unprepare(clk: d_phy->usb11_clk); |
52 | |
53 | return 0; |
54 | } |
55 | |
56 | static const struct phy_ops da8xx_usb11_phy_ops = { |
57 | .power_on = da8xx_usb11_phy_power_on, |
58 | .power_off = da8xx_usb11_phy_power_off, |
59 | .owner = THIS_MODULE, |
60 | }; |
61 | |
62 | static int da8xx_usb20_phy_power_on(struct phy *phy) |
63 | { |
64 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
65 | int ret; |
66 | |
67 | ret = clk_prepare_enable(clk: d_phy->usb20_clk); |
68 | if (ret) |
69 | return ret; |
70 | |
71 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, val: 0); |
72 | |
73 | return 0; |
74 | } |
75 | |
76 | static int da8xx_usb20_phy_power_off(struct phy *phy) |
77 | { |
78 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
79 | |
80 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, |
81 | CFGCHIP2_OTGPWRDN); |
82 | |
83 | clk_disable_unprepare(clk: d_phy->usb20_clk); |
84 | |
85 | return 0; |
86 | } |
87 | |
88 | static int da8xx_usb20_phy_set_mode(struct phy *phy, |
89 | enum phy_mode mode, int submode) |
90 | { |
91 | struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
92 | u32 val; |
93 | |
94 | switch (mode) { |
95 | case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ |
96 | val = CFGCHIP2_OTGMODE_FORCE_HOST; |
97 | break; |
98 | case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ |
99 | val = CFGCHIP2_OTGMODE_FORCE_DEVICE; |
100 | break; |
101 | case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ |
102 | val = CFGCHIP2_OTGMODE_NO_OVERRIDE; |
103 | break; |
104 | default: |
105 | return -EINVAL; |
106 | } |
107 | |
108 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, |
109 | val); |
110 | |
111 | return 0; |
112 | } |
113 | |
114 | static const struct phy_ops da8xx_usb20_phy_ops = { |
115 | .power_on = da8xx_usb20_phy_power_on, |
116 | .power_off = da8xx_usb20_phy_power_off, |
117 | .set_mode = da8xx_usb20_phy_set_mode, |
118 | .owner = THIS_MODULE, |
119 | }; |
120 | |
121 | static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, |
122 | const struct of_phandle_args *args) |
123 | { |
124 | struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); |
125 | |
126 | if (!d_phy) |
127 | return ERR_PTR(error: -ENODEV); |
128 | |
129 | switch (args->args[0]) { |
130 | case 0: |
131 | return d_phy->usb20_phy; |
132 | case 1: |
133 | return d_phy->usb11_phy; |
134 | default: |
135 | return ERR_PTR(error: -EINVAL); |
136 | } |
137 | } |
138 | |
139 | static int da8xx_usb_phy_probe(struct platform_device *pdev) |
140 | { |
141 | struct device *dev = &pdev->dev; |
142 | struct da8xx_usb_phy_platform_data *pdata = dev->platform_data; |
143 | struct device_node *node = dev->of_node; |
144 | struct da8xx_usb_phy *d_phy; |
145 | |
146 | d_phy = devm_kzalloc(dev, size: sizeof(*d_phy), GFP_KERNEL); |
147 | if (!d_phy) |
148 | return -ENOMEM; |
149 | |
150 | if (pdata) |
151 | d_phy->regmap = pdata->cfgchip; |
152 | else |
153 | d_phy->regmap = syscon_regmap_lookup_by_compatible( |
154 | s: "ti,da830-cfgchip" ); |
155 | if (IS_ERR(ptr: d_phy->regmap)) { |
156 | dev_err(dev, "Failed to get syscon\n" ); |
157 | return PTR_ERR(ptr: d_phy->regmap); |
158 | } |
159 | |
160 | d_phy->usb11_clk = devm_clk_get(dev, id: "usb1_clk48" ); |
161 | if (IS_ERR(ptr: d_phy->usb11_clk)) { |
162 | dev_err(dev, "Failed to get usb1_clk48\n" ); |
163 | return PTR_ERR(ptr: d_phy->usb11_clk); |
164 | } |
165 | |
166 | d_phy->usb20_clk = devm_clk_get(dev, id: "usb0_clk48" ); |
167 | if (IS_ERR(ptr: d_phy->usb20_clk)) { |
168 | dev_err(dev, "Failed to get usb0_clk48\n" ); |
169 | return PTR_ERR(ptr: d_phy->usb20_clk); |
170 | } |
171 | |
172 | d_phy->usb11_phy = devm_phy_create(dev, node, ops: &da8xx_usb11_phy_ops); |
173 | if (IS_ERR(ptr: d_phy->usb11_phy)) { |
174 | dev_err(dev, "Failed to create usb11 phy\n" ); |
175 | return PTR_ERR(ptr: d_phy->usb11_phy); |
176 | } |
177 | |
178 | d_phy->usb20_phy = devm_phy_create(dev, node, ops: &da8xx_usb20_phy_ops); |
179 | if (IS_ERR(ptr: d_phy->usb20_phy)) { |
180 | dev_err(dev, "Failed to create usb20 phy\n" ); |
181 | return PTR_ERR(ptr: d_phy->usb20_phy); |
182 | } |
183 | |
184 | platform_set_drvdata(pdev, data: d_phy); |
185 | phy_set_drvdata(phy: d_phy->usb11_phy, data: d_phy); |
186 | phy_set_drvdata(phy: d_phy->usb20_phy, data: d_phy); |
187 | |
188 | if (node) { |
189 | d_phy->phy_provider = devm_of_phy_provider_register(dev, |
190 | da8xx_usb_phy_of_xlate); |
191 | if (IS_ERR(ptr: d_phy->phy_provider)) { |
192 | dev_err(dev, "Failed to create phy provider\n" ); |
193 | return PTR_ERR(ptr: d_phy->phy_provider); |
194 | } |
195 | } else { |
196 | int ret; |
197 | |
198 | ret = phy_create_lookup(phy: d_phy->usb11_phy, con_id: "usb-phy" , |
199 | dev_id: "ohci-da8xx" ); |
200 | if (ret) |
201 | dev_warn(dev, "Failed to create usb11 phy lookup\n" ); |
202 | ret = phy_create_lookup(phy: d_phy->usb20_phy, con_id: "usb-phy" , |
203 | dev_id: "musb-da8xx" ); |
204 | if (ret) |
205 | dev_warn(dev, "Failed to create usb20 phy lookup\n" ); |
206 | } |
207 | |
208 | regmap_write_bits(map: d_phy->regmap, CFGCHIP(2), |
209 | PHY_INIT_BITS, PHY_INIT_BITS); |
210 | |
211 | return 0; |
212 | } |
213 | |
214 | static void da8xx_usb_phy_remove(struct platform_device *pdev) |
215 | { |
216 | struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); |
217 | |
218 | if (!pdev->dev.of_node) { |
219 | phy_remove_lookup(phy: d_phy->usb20_phy, con_id: "usb-phy" , dev_id: "musb-da8xx" ); |
220 | phy_remove_lookup(phy: d_phy->usb11_phy, con_id: "usb-phy" , dev_id: "ohci-da8xx" ); |
221 | } |
222 | } |
223 | |
224 | static const struct of_device_id da8xx_usb_phy_ids[] = { |
225 | { .compatible = "ti,da830-usb-phy" }, |
226 | { } |
227 | }; |
228 | MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); |
229 | |
230 | static struct platform_driver da8xx_usb_phy_driver = { |
231 | .probe = da8xx_usb_phy_probe, |
232 | .remove_new = da8xx_usb_phy_remove, |
233 | .driver = { |
234 | .name = "da8xx-usb-phy" , |
235 | .of_match_table = da8xx_usb_phy_ids, |
236 | }, |
237 | }; |
238 | |
239 | module_platform_driver(da8xx_usb_phy_driver); |
240 | |
241 | MODULE_ALIAS("platform:da8xx-usb-phy" ); |
242 | MODULE_AUTHOR("David Lechner <david@lechnology.com>" ); |
243 | MODULE_DESCRIPTION("TI DA8xx USB PHY driver" ); |
244 | MODULE_LICENSE("GPL v2" ); |
245 | |