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10a062ce AT |
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> | |
84bc70f9 | 15 | #include <linux/of_platform.h> |
10a062ce AT |
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 | ||
24 | struct ci_hdrc_usb2_priv { | |
25 | struct platform_device *ci_pdev; | |
26 | struct clk *clk; | |
27 | }; | |
28 | ||
d95699be | 29 | static const struct ci_hdrc_platform_data ci_default_pdata = { |
10a062ce AT |
30 | .capoffset = DEF_CAPOFFSET, |
31 | .flags = CI_HDRC_DISABLE_STREAMING, | |
32 | }; | |
33 | ||
84bc70f9 NS |
34 | static struct ci_hdrc_platform_data ci_zynq_pdata = { |
35 | .capoffset = DEF_CAPOFFSET, | |
36 | }; | |
37 | ||
38 | static 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 | }; | |
43 | MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); | |
44 | ||
10a062ce AT |
45 | static 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; | |
84bc70f9 | 51 | const struct of_device_id *match; |
10a062ce | 52 | |
d95699be RH |
53 | if (!ci_pdata) { |
54 | ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL); | |
55 | *ci_pdata = ci_default_pdata; /* struct copy */ | |
56 | } | |
10a062ce | 57 | |
84bc70f9 NS |
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 | ||
10a062ce AT |
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 | ||
101 | clk_err: | |
102 | if (!IS_ERR(priv->clk)) | |
103 | clk_disable_unprepare(priv->clk); | |
104 | return ret; | |
105 | } | |
106 | ||
107 | static 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 | ||
10a062ce AT |
118 | static 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", | |
10a062ce AT |
123 | .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), |
124 | }, | |
125 | }; | |
126 | module_platform_driver(ci_hdrc_usb2_driver); | |
127 | ||
128 | MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); | |
129 | MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); | |
130 | MODULE_LICENSE("GPL"); |