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 .flags = CI_HDRC_PHY_VBUS_CONTROL,
34 };
35
36 static const struct ci_hdrc_platform_data ci_zevio_pdata = {
37 .capoffset = DEF_CAPOFFSET,
38 .flags = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
39 };
40
41 static const struct of_device_id ci_hdrc_usb2_of_match[] = {
42 { .compatible = "chipidea,usb2" },
43 { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
44 { .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
45 { }
46 };
47 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
48
ci_hdrc_usb2_probe(struct platform_device * pdev)49 static int ci_hdrc_usb2_probe(struct platform_device *pdev)
50 {
51 struct device *dev = &pdev->dev;
52 struct ci_hdrc_usb2_priv *priv;
53 struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
54 int ret;
55 const struct of_device_id *match;
56
57 if (!ci_pdata) {
58 ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
59 if (!ci_pdata)
60 return -ENOMEM;
61 *ci_pdata = ci_default_pdata; /* struct copy */
62 }
63
64 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
65 if (match && match->data) {
66 /* struct copy */
67 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
68 }
69
70 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
71 if (!priv)
72 return -ENOMEM;
73
74 priv->clk = devm_clk_get_optional(dev, NULL);
75 if (IS_ERR(priv->clk))
76 return PTR_ERR(priv->clk);
77
78 ret = clk_prepare_enable(priv->clk);
79 if (ret) {
80 dev_err(dev, "failed to enable the clock: %d\n", ret);
81 return ret;
82 }
83
84 ci_pdata->name = dev_name(dev);
85
86 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
87 pdev->num_resources, ci_pdata);
88 if (IS_ERR(priv->ci_pdev)) {
89 ret = PTR_ERR(priv->ci_pdev);
90 if (ret != -EPROBE_DEFER)
91 dev_err(dev,
92 "failed to register ci_hdrc platform device: %d\n",
93 ret);
94 goto clk_err;
95 }
96
97 platform_set_drvdata(pdev, priv);
98
99 pm_runtime_no_callbacks(dev);
100 pm_runtime_enable(dev);
101
102 return 0;
103
104 clk_err:
105 clk_disable_unprepare(priv->clk);
106 return ret;
107 }
108
ci_hdrc_usb2_remove(struct platform_device * pdev)109 static int ci_hdrc_usb2_remove(struct platform_device *pdev)
110 {
111 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
112
113 pm_runtime_disable(&pdev->dev);
114 ci_hdrc_remove_device(priv->ci_pdev);
115 clk_disable_unprepare(priv->clk);
116
117 return 0;
118 }
119
120 static struct platform_driver ci_hdrc_usb2_driver = {
121 .probe = ci_hdrc_usb2_probe,
122 .remove = ci_hdrc_usb2_remove,
123 .driver = {
124 .name = "chipidea-usb2",
125 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
126 },
127 };
128 module_platform_driver(ci_hdrc_usb2_driver);
129
130 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
131 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
132 MODULE_LICENSE("GPL");
133