tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2014 Marvell Technology Group Ltd.
4 *
5 * Antoine Tenart <antoine.tenart@free-electrons.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/dma-mapping.h>
10#include <linux/module.h>
11#include <linux/of.h>
12#include <linux/of_platform.h>
13#include <linux/phy/phy.h>
14#include <linux/platform_device.h>
15#include <linux/usb/chipidea.h>
16#include <linux/usb/hcd.h>
17#include <linux/usb/ulpi.h>
18
19#include "ci.h"
20
21struct ci_hdrc_usb2_priv {
22 struct platform_device *ci_pdev;
23 struct clk *clk;
24};
25
26static const struct ci_hdrc_platform_data ci_default_pdata = {
27 .capoffset = DEF_CAPOFFSET,
28 .flags = CI_HDRC_DISABLE_STREAMING,
29};
30
31static struct ci_hdrc_platform_data ci_zynq_pdata = {
32 .capoffset = DEF_CAPOFFSET,
33};
34
35static const struct of_device_id ci_hdrc_usb2_of_match[] = {
36 { .compatible = "chipidea,usb2"},
37 { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
38 { }
39};
40MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
41
42static int ci_hdrc_usb2_probe(struct platform_device *pdev)
43{
44 struct device *dev = &pdev->dev;
45 struct ci_hdrc_usb2_priv *priv;
46 struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
47 int ret;
48 const struct of_device_id *match;
49
50 if (!ci_pdata) {
51 ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
52 if (!ci_pdata)
53 return -ENOMEM;
54 *ci_pdata = ci_default_pdata; /* struct copy */
55 }
56
57 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
58 if (match && match->data) {
59 /* struct copy */
60 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
61 }
62
63 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
64 if (!priv)
65 return -ENOMEM;
66
67 priv->clk = devm_clk_get(dev, NULL);
68 if (!IS_ERR(priv->clk)) {
69 ret = clk_prepare_enable(priv->clk);
70 if (ret) {
71 dev_err(dev, "failed to enable the clock: %d\n", ret);
72 return ret;
73 }
74 }
75
76 ci_pdata->name = dev_name(dev);
77
78 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
79 pdev->num_resources, ci_pdata);
80 if (IS_ERR(priv->ci_pdev)) {
81 ret = PTR_ERR(priv->ci_pdev);
82 if (ret != -EPROBE_DEFER)
83 dev_err(dev,
84 "failed to register ci_hdrc platform device: %d\n",
85 ret);
86 goto clk_err;
87 }
88
89 platform_set_drvdata(pdev, priv);
90
91 pm_runtime_no_callbacks(dev);
92 pm_runtime_enable(dev);
93
94 return 0;
95
96clk_err:
97 if (!IS_ERR(priv->clk))
98 clk_disable_unprepare(priv->clk);
99 return ret;
100}
101
102static int ci_hdrc_usb2_remove(struct platform_device *pdev)
103{
104 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
105
106 pm_runtime_disable(&pdev->dev);
107 ci_hdrc_remove_device(priv->ci_pdev);
108 clk_disable_unprepare(priv->clk);
109
110 return 0;
111}
112
113static struct platform_driver ci_hdrc_usb2_driver = {
114 .probe = ci_hdrc_usb2_probe,
115 .remove = ci_hdrc_usb2_remove,
116 .driver = {
117 .name = "chipidea-usb2",
118 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
119 },
120};
121module_platform_driver(ci_hdrc_usb2_driver);
122
123MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
124MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
125MODULE_LICENSE("GPL");