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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/module.h>
3#include <linux/platform_device.h>
4#include <linux/dma-mapping.h>
5#include <linux/usb/otg.h>
6#include <linux/usb/usb_phy_generic.h>
7#include <linux/slab.h>
8#include <linux/clk.h>
9#include <linux/of.h>
10#include <linux/of_address.h>
11#include <linux/usb/of.h>
12
13#include "phy-am335x-control.h"
14#include "phy-generic.h"
15
16struct am335x_phy {
17 struct usb_phy_generic usb_phy_gen;
18 struct phy_control *phy_ctrl;
19 int id;
20 enum usb_dr_mode dr_mode;
21};
22
23static int am335x_init(struct usb_phy *phy)
24{
25 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
26
27 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
28 return 0;
29}
30
31static void am335x_shutdown(struct usb_phy *phy)
32{
33 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
34
35 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
36}
37
38static int am335x_phy_probe(struct platform_device *pdev)
39{
40 struct am335x_phy *am_phy;
41 struct device *dev = &pdev->dev;
42 int ret;
43
44 am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
45 if (!am_phy)
46 return -ENOMEM;
47
48 am_phy->phy_ctrl = am335x_get_phy_control(dev);
49 if (!am_phy->phy_ctrl)
50 return -EPROBE_DEFER;
51
52 am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
53 if (am_phy->id < 0) {
54 dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
55 return am_phy->id;
56 }
57
58 am_phy->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1);
59
60 ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen);
61 if (ret)
62 return ret;
63
64 am_phy->usb_phy_gen.phy.init = am335x_init;
65 am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
66
67 platform_set_drvdata(pdev, am_phy);
68 device_init_wakeup(dev, true);
69
70 /*
71 * If we leave PHY wakeup enabled then AM33XX wakes up
72 * immediately from DS0. To avoid this we mark dev->power.can_wakeup
73 * to false. The same is checked in suspend routine to decide
74 * on whether to enable PHY wakeup or not.
75 * PHY wakeup works fine in standby mode, there by allowing us to
76 * handle remote wakeup, wakeup on disconnect and connect.
77 */
78
79 device_set_wakeup_enable(dev, false);
80 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
81
82 return usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
83}
84
85static int am335x_phy_remove(struct platform_device *pdev)
86{
87 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
88
89 usb_remove_phy(&am_phy->usb_phy_gen.phy);
90 return 0;
91}
92
93#ifdef CONFIG_PM_SLEEP
94static int am335x_phy_suspend(struct device *dev)
95{
96 struct am335x_phy *am_phy = dev_get_drvdata(dev);
97
98 /*
99 * Enable phy wakeup only if dev->power.can_wakeup is true.
100 * Make sure to enable wakeup to support remote wakeup in
101 * standby mode ( same is not supported in OFF(DS0) mode).
102 * Enable it by doing
103 * echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
104 */
105
106 if (device_may_wakeup(dev))
107 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
108
109 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
110
111 return 0;
112}
113
114static int am335x_phy_resume(struct device *dev)
115{
116 struct am335x_phy *am_phy = dev_get_drvdata(dev);
117
118 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
119
120 if (device_may_wakeup(dev))
121 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
122
123 return 0;
124}
125#endif
126
127static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume);
128
129static const struct of_device_id am335x_phy_ids[] = {
130 { .compatible = "ti,am335x-usb-phy" },
131 { }
132};
133MODULE_DEVICE_TABLE(of, am335x_phy_ids);
134
135static struct platform_driver am335x_phy_driver = {
136 .probe = am335x_phy_probe,
137 .remove = am335x_phy_remove,
138 .driver = {
139 .name = "am335x-phy-driver",
140 .pm = &am335x_pm_ops,
141 .of_match_table = am335x_phy_ids,
142 },
143};
144
145module_platform_driver(am335x_phy_driver);
146MODULE_LICENSE("GPL v2");
1#include <linux/module.h>
2#include <linux/platform_device.h>
3#include <linux/dma-mapping.h>
4#include <linux/usb/otg.h>
5#include <linux/usb/usb_phy_gen_xceiv.h>
6#include <linux/slab.h>
7#include <linux/clk.h>
8#include <linux/regulator/consumer.h>
9#include <linux/of.h>
10#include <linux/of_address.h>
11
12#include "am35x-phy-control.h"
13#include "phy-generic.h"
14
15struct am335x_phy {
16 struct usb_phy_gen_xceiv usb_phy_gen;
17 struct phy_control *phy_ctrl;
18 int id;
19};
20
21static int am335x_init(struct usb_phy *phy)
22{
23 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
24
25 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
26 return 0;
27}
28
29static void am335x_shutdown(struct usb_phy *phy)
30{
31 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
32
33 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
34}
35
36static int am335x_phy_probe(struct platform_device *pdev)
37{
38 struct am335x_phy *am_phy;
39 struct device *dev = &pdev->dev;
40 int ret;
41
42 am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
43 if (!am_phy)
44 return -ENOMEM;
45
46 am_phy->phy_ctrl = am335x_get_phy_control(dev);
47 if (!am_phy->phy_ctrl)
48 return -EPROBE_DEFER;
49 am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
50 if (am_phy->id < 0) {
51 dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
52 return am_phy->id;
53 }
54
55 ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
56 if (ret)
57 return ret;
58
59 ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
60 if (ret)
61 return ret;
62 am_phy->usb_phy_gen.phy.init = am335x_init;
63 am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
64
65 platform_set_drvdata(pdev, am_phy);
66 device_init_wakeup(dev, true);
67
68 /*
69 * If we leave PHY wakeup enabled then AM33XX wakes up
70 * immediately from DS0. To avoid this we mark dev->power.can_wakeup
71 * to false. The same is checked in suspend routine to decide
72 * on whether to enable PHY wakeup or not.
73 * PHY wakeup works fine in standby mode, there by allowing us to
74 * handle remote wakeup, wakeup on disconnect and connect.
75 */
76
77 device_set_wakeup_enable(dev, false);
78 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
79
80 return 0;
81}
82
83static int am335x_phy_remove(struct platform_device *pdev)
84{
85 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
86
87 usb_remove_phy(&am_phy->usb_phy_gen.phy);
88 return 0;
89}
90
91#ifdef CONFIG_PM_SLEEP
92static int am335x_phy_suspend(struct device *dev)
93{
94 struct platform_device *pdev = to_platform_device(dev);
95 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
96
97 /*
98 * Enable phy wakeup only if dev->power.can_wakeup is true.
99 * Make sure to enable wakeup to support remote wakeup in
100 * standby mode ( same is not supported in OFF(DS0) mode).
101 * Enable it by doing
102 * echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
103 */
104
105 if (device_may_wakeup(dev))
106 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
107
108 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
109
110 return 0;
111}
112
113static int am335x_phy_resume(struct device *dev)
114{
115 struct platform_device *pdev = to_platform_device(dev);
116 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
117
118 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
119
120 if (device_may_wakeup(dev))
121 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
122
123 return 0;
124}
125
126static const struct dev_pm_ops am335x_pm_ops = {
127 SET_SYSTEM_SLEEP_PM_OPS(am335x_phy_suspend, am335x_phy_resume)
128};
129
130#define DEV_PM_OPS (&am335x_pm_ops)
131#else
132#define DEV_PM_OPS NULL
133#endif
134
135static const struct of_device_id am335x_phy_ids[] = {
136 { .compatible = "ti,am335x-usb-phy" },
137 { }
138};
139MODULE_DEVICE_TABLE(of, am335x_phy_ids);
140
141static struct platform_driver am335x_phy_driver = {
142 .probe = am335x_phy_probe,
143 .remove = am335x_phy_remove,
144 .driver = {
145 .name = "am335x-phy-driver",
146 .owner = THIS_MODULE,
147 .pm = DEV_PM_OPS,
148 .of_match_table = am335x_phy_ids,
149 },
150};
151
152module_platform_driver(am335x_phy_driver);
153MODULE_LICENSE("GPL v2");