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 const struct ci_hdrc_platform_data ci_zynq_pdata = {
32	.capoffset	= DEF_CAPOFFSET,
33	.flags          = CI_HDRC_PHY_VBUS_CONTROL,
34};
35
36static const struct ci_hdrc_platform_data ci_zevio_pdata = {
37	.capoffset	= DEF_CAPOFFSET,
38	.flags		= CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
39};
40
41static const struct of_device_id ci_hdrc_usb2_of_match[] = {
42	{ .compatible = "chipidea,usb2" },
43	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
44	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
45	{ }
46};
47MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
48
49static int ci_hdrc_usb2_probe(struct platform_device *pdev)
50{
51	struct device *dev = &pdev->dev;
52	struct ci_hdrc_usb2_priv *priv;
53	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
54	int ret;
55	const struct of_device_id *match;
56
57	if (!ci_pdata) {
58		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
59		if (!ci_pdata)
60			return -ENOMEM;
61		*ci_pdata = ci_default_pdata;	/* struct copy */
62	}
63
64	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
65	if (match && match->data) {
66		/* struct copy */
67		*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
68	}
69
70	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
71	if (!priv)
72		return -ENOMEM;
73
74	priv->clk = devm_clk_get_optional(dev, NULL);
75	if (IS_ERR(priv->clk))
76		return PTR_ERR(priv->clk);
77
78	ret = clk_prepare_enable(priv->clk);
79	if (ret) {
80		dev_err(dev, "failed to enable the clock: %d\n", ret);
81		return ret;
82	}
83
84	ci_pdata->name = dev_name(dev);
85
86	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
87					   pdev->num_resources, ci_pdata);
88	if (IS_ERR(priv->ci_pdev)) {
89		ret = PTR_ERR(priv->ci_pdev);
90		if (ret != -EPROBE_DEFER)
91			dev_err(dev,
92				"failed to register ci_hdrc platform device: %d\n",
93				ret);
94		goto clk_err;
95	}
96
97	platform_set_drvdata(pdev, priv);
98
99	pm_runtime_no_callbacks(dev);
100	pm_runtime_enable(dev);
101
102	return 0;
103
104clk_err:
105	clk_disable_unprepare(priv->clk);
106	return ret;
107}
108
109static void ci_hdrc_usb2_remove(struct platform_device *pdev)
110{
111	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
112
113	pm_runtime_disable(&pdev->dev);
114	ci_hdrc_remove_device(priv->ci_pdev);
115	clk_disable_unprepare(priv->clk);
116}
117
118static struct platform_driver ci_hdrc_usb2_driver = {
119	.probe	= ci_hdrc_usb2_probe,
120	.remove_new = ci_hdrc_usb2_remove,
121	.driver	= {
122		.name		= "chipidea-usb2",
123		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
124	},
125};
126module_platform_driver(ci_hdrc_usb2_driver);
127
128MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
129MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
130MODULE_LICENSE("GPL");
131