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/phy/phy.h>
13 #include <linux/platform_device.h>
14 #include <linux/property.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 const struct ci_hdrc_platform_data *data;
55 int ret;
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 data = device_get_match_data(&pdev->dev);
65 if (data)
66 /* struct copy */
67 *ci_pdata = *data;
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
ci_hdrc_usb2_remove(struct platform_device * pdev)108 static void 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
117 static struct platform_driver ci_hdrc_usb2_driver = {
118 .probe = ci_hdrc_usb2_probe,
119 .remove_new = ci_hdrc_usb2_remove,
120 .driver = {
121 .name = "chipidea-usb2",
122 .of_match_table = ci_hdrc_usb2_of_match,
123 },
124 };
125 module_platform_driver(ci_hdrc_usb2_driver);
126
127 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
128 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
129 MODULE_LICENSE("GPL");
130