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 const struct ci_hdrc_platform_data ci_zynq_pdata = {
32 	.capoffset	= DEF_CAPOFFSET,
33 };
34 
35 static 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 
40 static 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 };
46 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
47 
48 static 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 
103 clk_err:
104 	clk_disable_unprepare(priv->clk);
105 	return ret;
106 }
107 
108 static 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 
119 static 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 };
127 module_platform_driver(ci_hdrc_usb2_driver);
128 
129 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
130 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
131 MODULE_LICENSE("GPL");
132