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 
21 struct ci_hdrc_usb2_priv {
22 	struct platform_device	*ci_pdev;
23 	struct clk		*clk;
24 };
25 
26 static const struct ci_hdrc_platform_data ci_default_pdata = {
27 	.capoffset	= DEF_CAPOFFSET,
28 	.flags		= CI_HDRC_DISABLE_STREAMING,
29 };
30 
31 static struct ci_hdrc_platform_data ci_zynq_pdata = {
32 	.capoffset	= DEF_CAPOFFSET,
33 };
34 
35 static 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 };
40 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
41 
42 static 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 
96 clk_err:
97 	if (!IS_ERR(priv->clk))
98 		clk_disable_unprepare(priv->clk);
99 	return ret;
100 }
101 
102 static 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 
113 static 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 };
121 module_platform_driver(ci_hdrc_usb2_driver);
122 
123 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
124 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
125 MODULE_LICENSE("GPL");
126