1 /*
2  * Copyright (C) 2014 Marvell Technology Group Ltd.
3  *
4  * Antoine Tenart <antoine.tenart@free-electrons.com>
5  *
6  * This file is licensed under the terms of the GNU General Public
7  * License version 2. This program is licensed "as is" without any
8  * warranty of any kind, whether express or implied.
9  */
10 
11 #include <linux/clk.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/phy/phy.h>
16 #include <linux/platform_device.h>
17 #include <linux/usb/chipidea.h>
18 #include <linux/usb/hcd.h>
19 #include <linux/usb/ulpi.h>
20 
21 #include "ci.h"
22 
23 struct ci_hdrc_usb2_priv {
24 	struct platform_device	*ci_pdev;
25 	struct clk		*clk;
26 };
27 
28 static struct ci_hdrc_platform_data ci_default_pdata = {
29 	.capoffset	= DEF_CAPOFFSET,
30 	.flags		= CI_HDRC_DISABLE_STREAMING,
31 };
32 
33 static int ci_hdrc_usb2_probe(struct platform_device *pdev)
34 {
35 	struct device *dev = &pdev->dev;
36 	struct ci_hdrc_usb2_priv *priv;
37 	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
38 	int ret;
39 
40 	if (!ci_pdata)
41 		ci_pdata = &ci_default_pdata;
42 
43 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
44 	if (!priv)
45 		return -ENOMEM;
46 
47 	priv->clk = devm_clk_get(dev, NULL);
48 	if (!IS_ERR(priv->clk)) {
49 		ret = clk_prepare_enable(priv->clk);
50 		if (ret) {
51 			dev_err(dev, "failed to enable the clock: %d\n", ret);
52 			return ret;
53 		}
54 	}
55 
56 	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
57 	if (ret)
58 		goto clk_err;
59 
60 	ci_pdata->name = dev_name(dev);
61 
62 	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
63 					   pdev->num_resources, ci_pdata);
64 	if (IS_ERR(priv->ci_pdev)) {
65 		ret = PTR_ERR(priv->ci_pdev);
66 		if (ret != -EPROBE_DEFER)
67 			dev_err(dev,
68 				"failed to register ci_hdrc platform device: %d\n",
69 				ret);
70 		goto clk_err;
71 	}
72 
73 	platform_set_drvdata(pdev, priv);
74 
75 	pm_runtime_no_callbacks(dev);
76 	pm_runtime_enable(dev);
77 
78 	return 0;
79 
80 clk_err:
81 	if (!IS_ERR(priv->clk))
82 		clk_disable_unprepare(priv->clk);
83 	return ret;
84 }
85 
86 static int ci_hdrc_usb2_remove(struct platform_device *pdev)
87 {
88 	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
89 
90 	pm_runtime_disable(&pdev->dev);
91 	ci_hdrc_remove_device(priv->ci_pdev);
92 	clk_disable_unprepare(priv->clk);
93 
94 	return 0;
95 }
96 
97 static const struct of_device_id ci_hdrc_usb2_of_match[] = {
98 	{ .compatible = "chipidea,usb2" },
99 	{ }
100 };
101 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
102 
103 static struct platform_driver ci_hdrc_usb2_driver = {
104 	.probe	= ci_hdrc_usb2_probe,
105 	.remove	= ci_hdrc_usb2_remove,
106 	.driver	= {
107 		.name		= "chipidea-usb2",
108 		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
109 	},
110 };
111 module_platform_driver(ci_hdrc_usb2_driver);
112 
113 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
114 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
115 MODULE_LICENSE("GPL");
116