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
131
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2014 Marvell Technology Group Ltd.
*
* Antoine Tenart <antoine.tenart@free-electrons.com>
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ulpi.h>
#include "ci.h"
struct ci_hdrc_usb2_priv {
struct platform_device *ci_pdev;
struct clk *clk;
};
static const struct ci_hdrc_platform_data ci_default_pdata = {
.capoffset = DEF_CAPOFFSET,
.flags = CI_HDRC_DISABLE_STREAMING,
};
static const struct ci_hdrc_platform_data ci_zynq_pdata = {
.capoffset = DEF_CAPOFFSET,
};
static const struct ci_hdrc_platform_data ci_zevio_pdata = {
.capoffset = DEF_CAPOFFSET,
.flags = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
};
static const struct of_device_id ci_hdrc_usb2_of_match[] = {
{ .compatible = "chipidea,usb2" },
{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
{ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
static int ci_hdrc_usb2_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ci_hdrc_usb2_priv *priv;
struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
int ret;
const struct of_device_id *match;
if (!ci_pdata) {
ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
if (!ci_pdata)
return -ENOMEM;
*ci_pdata = ci_default_pdata; /* struct copy */
}
match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
if (match && match->data) {
/* struct copy */
*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
}
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->clk = devm_clk_get_optional(dev, NULL);
if (IS_ERR(priv->clk))
return PTR_ERR(priv->clk);
ret = clk_prepare_enable(priv->clk);
if (ret) {
dev_err(dev, "failed to enable the clock: %d\n", ret);
return ret;
}
ci_pdata->name = dev_name(dev);
priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
pdev->num_resources, ci_pdata);
if (IS_ERR(priv->ci_pdev)) {
ret = PTR_ERR(priv->ci_pdev);
if (ret != -EPROBE_DEFER)
dev_err(dev,
"failed to register ci_hdrc platform device: %d\n",
ret);
goto clk_err;
}
platform_set_drvdata(pdev, priv);
pm_runtime_no_callbacks(dev);
pm_runtime_enable(dev);
return 0;
clk_err:
clk_disable_unprepare(priv->clk);
return ret;
}
static int ci_hdrc_usb2_remove(struct platform_device *pdev)
{
struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
ci_hdrc_remove_device(priv->ci_pdev);
clk_disable_unprepare(priv->clk);
return 0;
}
static struct platform_driver ci_hdrc_usb2_driver = {
.probe = ci_hdrc_usb2_probe,
.remove = ci_hdrc_usb2_remove,
.driver = {
.name = "chipidea-usb2",
.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
},
};
module_platform_driver(ci_hdrc_usb2_driver);
MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
MODULE_LICENSE("GPL");
|
