tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/of_platform.h>
16#include <linux/phy/phy.h>
17#include <linux/platform_device.h>
18#include <linux/usb/chipidea.h>
19#include <linux/usb/hcd.h>
20#include <linux/usb/ulpi.h>
21
22#include "ci.h"
23
24struct ci_hdrc_usb2_priv {
25 struct platform_device *ci_pdev;
26 struct clk *clk;
27};
28
29static const struct ci_hdrc_platform_data ci_default_pdata = {
30 .capoffset = DEF_CAPOFFSET,
31 .flags = CI_HDRC_DISABLE_STREAMING,
32};
33
34static struct ci_hdrc_platform_data ci_zynq_pdata = {
35 .capoffset = DEF_CAPOFFSET,
36};
37
38static const struct of_device_id ci_hdrc_usb2_of_match[] = {
39 { .compatible = "chipidea,usb2"},
40 { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
41 { }
42};
43MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
44
45static int ci_hdrc_usb2_probe(struct platform_device *pdev)
46{
47 struct device *dev = &pdev->dev;
48 struct ci_hdrc_usb2_priv *priv;
49 struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
50 int ret;
51 const struct of_device_id *match;
52
53 if (!ci_pdata) {
54 ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
55 *ci_pdata = ci_default_pdata; /* struct copy */
56 }
57
58 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
59 if (match && match->data) {
60 /* struct copy */
61 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
62 }
63
64 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
65 if (!priv)
66 return -ENOMEM;
67
68 priv->clk = devm_clk_get(dev, NULL);
69 if (!IS_ERR(priv->clk)) {
70 ret = clk_prepare_enable(priv->clk);
71 if (ret) {
72 dev_err(dev, "failed to enable the clock: %d\n", ret);
73 return ret;
74 }
75 }
76
77 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
78 if (ret)
79 goto clk_err;
80
81 ci_pdata->name = dev_name(dev);
82
83 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
84 pdev->num_resources, ci_pdata);
85 if (IS_ERR(priv->ci_pdev)) {
86 ret = PTR_ERR(priv->ci_pdev);
87 if (ret != -EPROBE_DEFER)
88 dev_err(dev,
89 "failed to register ci_hdrc platform device: %d\n",
90 ret);
91 goto clk_err;
92 }
93
94 platform_set_drvdata(pdev, priv);
95
96 pm_runtime_no_callbacks(dev);
97 pm_runtime_enable(dev);
98
99 return 0;
100
101clk_err:
102 if (!IS_ERR(priv->clk))
103 clk_disable_unprepare(priv->clk);
104 return ret;
105}
106
107static int ci_hdrc_usb2_remove(struct platform_device *pdev)
108{
109 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
110
111 pm_runtime_disable(&pdev->dev);
112 ci_hdrc_remove_device(priv->ci_pdev);
113 clk_disable_unprepare(priv->clk);
114
115 return 0;
116}
117
118static struct platform_driver ci_hdrc_usb2_driver = {
119 .probe = ci_hdrc_usb2_probe,
120 .remove = ci_hdrc_usb2_remove,
121 .driver = {
122 .name = "chipidea-usb2",
123 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
124 },
125};
126module_platform_driver(ci_hdrc_usb2_driver);
127
128MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
129MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
130MODULE_LICENSE("GPL");