summaryrefslogtreecommitdiff
path: root/drivers/usb/phy/phy-am335x.c
blob: 0e3c60cb669a63c7a1d1bb7bd673f212f854c425 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_gen_xceiv.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/of.h>
#include <linux/of_address.h>

#include "am35x-phy-control.h"
#include "phy-generic.h"

struct am335x_phy {
	struct usb_phy_gen_xceiv usb_phy_gen;
	struct phy_control *phy_ctrl;
	int id;
};

static int am335x_init(struct usb_phy *phy)
{
	struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
	return 0;
}

static void am335x_shutdown(struct usb_phy *phy)
{
	struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
}

static int am335x_phy_probe(struct platform_device *pdev)
{
	struct am335x_phy *am_phy;
	struct device *dev = &pdev->dev;
	int ret;

	am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
	if (!am_phy)
		return -ENOMEM;

	am_phy->phy_ctrl = am335x_get_phy_control(dev);
	if (!am_phy->phy_ctrl)
		return -EPROBE_DEFER;
	am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
	if (am_phy->id < 0) {
		dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
		return am_phy->id;
	}

	ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
	if (ret)
		return ret;

	ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
	if (ret)
		return ret;
	am_phy->usb_phy_gen.phy.init = am335x_init;
	am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;

	platform_set_drvdata(pdev, am_phy);

	return 0;
}

static int am335x_phy_remove(struct platform_device *pdev)
{
	struct am335x_phy *am_phy = platform_get_drvdata(pdev);

	usb_remove_phy(&am_phy->usb_phy_gen.phy);
	return 0;
}

#ifdef CONFIG_PM_RUNTIME

static int am335x_phy_runtime_suspend(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct am335x_phy *am_phy = platform_get_drvdata(pdev);

	if (device_may_wakeup(dev))
		phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
	return 0;
}

static int am335x_phy_runtime_resume(struct device *dev)
{
	struct platform_device	*pdev = to_platform_device(dev);
	struct am335x_phy	*am_phy = platform_get_drvdata(pdev);

	phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
	if (device_may_wakeup(dev))
		phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
	return 0;
}

static const struct dev_pm_ops am335x_pm_ops = {
	SET_RUNTIME_PM_OPS(am335x_phy_runtime_suspend,
			am335x_phy_runtime_resume, NULL)
};

#define DEV_PM_OPS	(&am335x_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif

static const struct of_device_id am335x_phy_ids[] = {
	{ .compatible = "ti,am335x-usb-phy" },
	{ }
};
MODULE_DEVICE_TABLE(of, am335x_phy_ids);

static struct platform_driver am335x_phy_driver = {
	.probe          = am335x_phy_probe,
	.remove         = am335x_phy_remove,
	.driver         = {
		.name   = "am335x-phy-driver",
		.owner  = THIS_MODULE,
		.pm = DEV_PM_OPS,
		.of_match_table = am335x_phy_ids,
	},
};

module_platform_driver(am335x_phy_driver);
MODULE_LICENSE("GPL v2");