1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2016, NVIDIA Corporation
4 */
5
6#include <linux/clk.h>
7#include <linux/module.h>
8#include <linux/of_device.h>
9#include <linux/reset.h>
10
11#include <linux/usb/chipidea.h>
12
13#include "ci.h"
14
15struct tegra_udc {
16	struct ci_hdrc_platform_data data;
17	struct platform_device *dev;
18
19	struct usb_phy *phy;
20	struct clk *clk;
21};
22
23struct tegra_udc_soc_info {
24	unsigned long flags;
25};
26
27static const struct tegra_udc_soc_info tegra_udc_soc_info = {
28	.flags = CI_HDRC_REQUIRES_ALIGNED_DMA,
29};
30
31static const struct of_device_id tegra_udc_of_match[] = {
32	{
33		.compatible = "nvidia,tegra20-udc",
34		.data = &tegra_udc_soc_info,
35	}, {
36		.compatible = "nvidia,tegra30-udc",
37		.data = &tegra_udc_soc_info,
38	}, {
39		.compatible = "nvidia,tegra114-udc",
40		.data = &tegra_udc_soc_info,
41	}, {
42		.compatible = "nvidia,tegra124-udc",
43		.data = &tegra_udc_soc_info,
44	}, {
45		/* sentinel */
46	}
47};
48MODULE_DEVICE_TABLE(of, tegra_udc_of_match);
49
50static int tegra_udc_probe(struct platform_device *pdev)
51{
52	const struct tegra_udc_soc_info *soc;
53	struct tegra_udc *udc;
54	int err;
55
56	udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
57	if (!udc)
58		return -ENOMEM;
59
60	soc = of_device_get_match_data(&pdev->dev);
61	if (!soc) {
62		dev_err(&pdev->dev, "failed to match OF data\n");
63		return -EINVAL;
64	}
65
66	udc->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0);
67	if (IS_ERR(udc->phy)) {
68		err = PTR_ERR(udc->phy);
69		dev_err(&pdev->dev, "failed to get PHY: %d\n", err);
70		return err;
71	}
72
73	udc->clk = devm_clk_get(&pdev->dev, NULL);
74	if (IS_ERR(udc->clk)) {
75		err = PTR_ERR(udc->clk);
76		dev_err(&pdev->dev, "failed to get clock: %d\n", err);
77		return err;
78	}
79
80	err = clk_prepare_enable(udc->clk);
81	if (err < 0) {
82		dev_err(&pdev->dev, "failed to enable clock: %d\n", err);
83		return err;
84	}
85
86	/* setup and register ChipIdea HDRC device */
87	udc->data.name = "tegra-udc";
88	udc->data.flags = soc->flags;
89	udc->data.usb_phy = udc->phy;
90	udc->data.capoffset = DEF_CAPOFFSET;
91
92	udc->dev = ci_hdrc_add_device(&pdev->dev, pdev->resource,
93				      pdev->num_resources, &udc->data);
94	if (IS_ERR(udc->dev)) {
95		err = PTR_ERR(udc->dev);
96		dev_err(&pdev->dev, "failed to add HDRC device: %d\n", err);
97		goto fail_power_off;
98	}
99
100	platform_set_drvdata(pdev, udc);
101
102	return 0;
103
104fail_power_off:
105	clk_disable_unprepare(udc->clk);
106	return err;
107}
108
109static int tegra_udc_remove(struct platform_device *pdev)
110{
111	struct tegra_udc *udc = platform_get_drvdata(pdev);
112
113	ci_hdrc_remove_device(udc->dev);
114	clk_disable_unprepare(udc->clk);
115
116	return 0;
117}
118
119static struct platform_driver tegra_udc_driver = {
120	.driver = {
121		.name = "tegra-udc",
122		.of_match_table = tegra_udc_of_match,
123	},
124	.probe = tegra_udc_probe,
125	.remove = tegra_udc_remove,
126};
127module_platform_driver(tegra_udc_driver);
128
129MODULE_DESCRIPTION("NVIDIA Tegra USB device mode driver");
130MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
131MODULE_ALIAS("platform:tegra-udc");
132MODULE_LICENSE("GPL v2");
133