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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
21struct 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
30static 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(d_phy->usb11_clk);
36 if (ret)
37 return ret;
38
39 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM,
40 CFGCHIP2_USB1SUSPENDM);
41
42 return 0;
43}
44
45static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0);
50
51 clk_disable_unprepare(d_phy->usb11_clk);
52
53 return 0;
54}
55
56static 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
62static 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(d_phy->usb20_clk);
68 if (ret)
69 return ret;
70
71 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0);
72
73 return 0;
74}
75
76static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN,
81 CFGCHIP2_OTGPWRDN);
82
83 clk_disable_unprepare(d_phy->usb20_clk);
84
85 return 0;
86}
87
88static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK,
109 val);
110
111 return 0;
112}
113
114static 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
121static struct phy *da8xx_usb_phy_of_xlate(struct device *dev,
122 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(-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(-EINVAL);
136 }
137}
138
139static 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, 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 "ti,da830-cfgchip");
155 if (IS_ERR(d_phy->regmap)) {
156 dev_err(dev, "Failed to get syscon\n");
157 return PTR_ERR(d_phy->regmap);
158 }
159
160 d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48");
161 if (IS_ERR(d_phy->usb11_clk)) {
162 dev_err(dev, "Failed to get usb1_clk48\n");
163 return PTR_ERR(d_phy->usb11_clk);
164 }
165
166 d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48");
167 if (IS_ERR(d_phy->usb20_clk)) {
168 dev_err(dev, "Failed to get usb0_clk48\n");
169 return PTR_ERR(d_phy->usb20_clk);
170 }
171
172 d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops);
173 if (IS_ERR(d_phy->usb11_phy)) {
174 dev_err(dev, "Failed to create usb11 phy\n");
175 return PTR_ERR(d_phy->usb11_phy);
176 }
177
178 d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops);
179 if (IS_ERR(d_phy->usb20_phy)) {
180 dev_err(dev, "Failed to create usb20 phy\n");
181 return PTR_ERR(d_phy->usb20_phy);
182 }
183
184 platform_set_drvdata(pdev, d_phy);
185 phy_set_drvdata(d_phy->usb11_phy, d_phy);
186 phy_set_drvdata(d_phy->usb20_phy, 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(d_phy->phy_provider)) {
192 dev_err(dev, "Failed to create phy provider\n");
193 return PTR_ERR(d_phy->phy_provider);
194 }
195 } else {
196 int ret;
197
198 ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy",
199 "ohci-da8xx");
200 if (ret)
201 dev_warn(dev, "Failed to create usb11 phy lookup\n");
202 ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy",
203 "musb-da8xx");
204 if (ret)
205 dev_warn(dev, "Failed to create usb20 phy lookup\n");
206 }
207
208 regmap_write_bits(d_phy->regmap, CFGCHIP(2),
209 PHY_INIT_BITS, PHY_INIT_BITS);
210
211 return 0;
212}
213
214static int 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(d_phy->usb20_phy, "usb-phy", "musb-da8xx");
220 phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx");
221 }
222
223 return 0;
224}
225
226static const struct of_device_id da8xx_usb_phy_ids[] = {
227 { .compatible = "ti,da830-usb-phy" },
228 { }
229};
230MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids);
231
232static struct platform_driver da8xx_usb_phy_driver = {
233 .probe = da8xx_usb_phy_probe,
234 .remove = da8xx_usb_phy_remove,
235 .driver = {
236 .name = "da8xx-usb-phy",
237 .of_match_table = da8xx_usb_phy_ids,
238 },
239};
240
241module_platform_driver(da8xx_usb_phy_driver);
242
243MODULE_ALIAS("platform:da8xx-usb-phy");
244MODULE_AUTHOR("David Lechner <david@lechnology.com>");
245MODULE_DESCRIPTION("TI DA8xx USB PHY driver");
246MODULE_LICENSE("GPL v2");
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
21struct 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
30static 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(d_phy->usb11_clk);
36 if (ret)
37 return ret;
38
39 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM,
40 CFGCHIP2_USB1SUSPENDM);
41
42 return 0;
43}
44
45static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0);
50
51 clk_disable_unprepare(d_phy->usb11_clk);
52
53 return 0;
54}
55
56static 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
62static 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(d_phy->usb20_clk);
68 if (ret)
69 return ret;
70
71 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0);
72
73 return 0;
74}
75
76static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN,
81 CFGCHIP2_OTGPWRDN);
82
83 clk_disable_unprepare(d_phy->usb20_clk);
84
85 return 0;
86}
87
88static 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(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK,
109 val);
110
111 return 0;
112}
113
114static 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
121static struct phy *da8xx_usb_phy_of_xlate(struct device *dev,
122 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(-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(-EINVAL);
136 }
137}
138
139static 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, 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 "ti,da830-cfgchip");
155 if (IS_ERR(d_phy->regmap)) {
156 dev_err(dev, "Failed to get syscon\n");
157 return PTR_ERR(d_phy->regmap);
158 }
159
160 d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48");
161 if (IS_ERR(d_phy->usb11_clk)) {
162 dev_err(dev, "Failed to get usb1_clk48\n");
163 return PTR_ERR(d_phy->usb11_clk);
164 }
165
166 d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48");
167 if (IS_ERR(d_phy->usb20_clk)) {
168 dev_err(dev, "Failed to get usb0_clk48\n");
169 return PTR_ERR(d_phy->usb20_clk);
170 }
171
172 d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops);
173 if (IS_ERR(d_phy->usb11_phy)) {
174 dev_err(dev, "Failed to create usb11 phy\n");
175 return PTR_ERR(d_phy->usb11_phy);
176 }
177
178 d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops);
179 if (IS_ERR(d_phy->usb20_phy)) {
180 dev_err(dev, "Failed to create usb20 phy\n");
181 return PTR_ERR(d_phy->usb20_phy);
182 }
183
184 platform_set_drvdata(pdev, d_phy);
185 phy_set_drvdata(d_phy->usb11_phy, d_phy);
186 phy_set_drvdata(d_phy->usb20_phy, 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(d_phy->phy_provider)) {
192 dev_err(dev, "Failed to create phy provider\n");
193 return PTR_ERR(d_phy->phy_provider);
194 }
195 } else {
196 int ret;
197
198 ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy",
199 "ohci-da8xx");
200 if (ret)
201 dev_warn(dev, "Failed to create usb11 phy lookup\n");
202 ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy",
203 "musb-da8xx");
204 if (ret)
205 dev_warn(dev, "Failed to create usb20 phy lookup\n");
206 }
207
208 regmap_write_bits(d_phy->regmap, CFGCHIP(2),
209 PHY_INIT_BITS, PHY_INIT_BITS);
210
211 return 0;
212}
213
214static 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(d_phy->usb20_phy, "usb-phy", "musb-da8xx");
220 phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx");
221 }
222}
223
224static const struct of_device_id da8xx_usb_phy_ids[] = {
225 { .compatible = "ti,da830-usb-phy" },
226 { }
227};
228MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids);
229
230static 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
239module_platform_driver(da8xx_usb_phy_driver);
240
241MODULE_ALIAS("platform:da8xx-usb-phy");
242MODULE_AUTHOR("David Lechner <david@lechnology.com>");
243MODULE_DESCRIPTION("TI DA8xx USB PHY driver");
244MODULE_LICENSE("GPL v2");