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};
34
35static const struct ci_hdrc_platform_data ci_zevio_pdata = {
36	.capoffset	= DEF_CAPOFFSET,
37	.flags		= CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
38};
39
40static const struct of_device_id ci_hdrc_usb2_of_match[] = {
41	{ .compatible = "chipidea,usb2" },
42	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
43	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
44	{ }
45};
46MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
47
48static int ci_hdrc_usb2_probe(struct platform_device *pdev)
49{
50	struct device *dev = &pdev->dev;
51	struct ci_hdrc_usb2_priv *priv;
52	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
53	int ret;
54	const struct of_device_id *match;
55
56	if (!ci_pdata) {
57		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
58		if (!ci_pdata)
59			return -ENOMEM;
60		*ci_pdata = ci_default_pdata;	/* struct copy */
61	}
62
63	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
64	if (match && match->data) {
65		/* struct copy */
66		*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
67	}
68
69	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
70	if (!priv)
71		return -ENOMEM;
72
73	priv->clk = devm_clk_get_optional(dev, NULL);
74	if (IS_ERR(priv->clk))
75		return PTR_ERR(priv->clk);
76
77	ret = clk_prepare_enable(priv->clk);
78	if (ret) {
79		dev_err(dev, "failed to enable the clock: %d\n", ret);
80		return ret;
81	}
82
83	ci_pdata->name = dev_name(dev);
84
85	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
86					   pdev->num_resources, ci_pdata);
87	if (IS_ERR(priv->ci_pdev)) {
88		ret = PTR_ERR(priv->ci_pdev);
89		if (ret != -EPROBE_DEFER)
90			dev_err(dev,
91				"failed to register ci_hdrc platform device: %d\n",
92				ret);
93		goto clk_err;
94	}
95
96	platform_set_drvdata(pdev, priv);
97
98	pm_runtime_no_callbacks(dev);
99	pm_runtime_enable(dev);
100
101	return 0;
102
103clk_err:
104	clk_disable_unprepare(priv->clk);
105	return ret;
106}
107
108static int ci_hdrc_usb2_remove(struct platform_device *pdev)
109{
110	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
111
112	pm_runtime_disable(&pdev->dev);
113	ci_hdrc_remove_device(priv->ci_pdev);
114	clk_disable_unprepare(priv->clk);
115
116	return 0;
117}
118
119static struct platform_driver ci_hdrc_usb2_driver = {
120	.probe	= ci_hdrc_usb2_probe,
121	.remove	= ci_hdrc_usb2_remove,
122	.driver	= {
123		.name		= "chipidea-usb2",
124		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
125	},
126};
127module_platform_driver(ci_hdrc_usb2_driver);
128
129MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
130MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
131MODULE_LICENSE("GPL");
132