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15302800 RZ |
1 | /* |
2 | * Copyright 2012 Freescale Semiconductor, Inc. | |
3 | * Copyright (C) 2012 Marek Vasut <marex@denx.de> | |
4 | * on behalf of DENX Software Engineering GmbH | |
5 | * | |
6 | * The code contained herein is licensed under the GNU General Public | |
7 | * License. You may obtain a copy of the GNU General Public License | |
8 | * Version 2 or later at the following locations: | |
9 | * | |
10 | * http://www.opensource.org/licenses/gpl-license.html | |
11 | * http://www.gnu.org/copyleft/gpl.html | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/of_platform.h> | |
16 | #include <linux/of_gpio.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/pm_runtime.h> | |
19 | #include <linux/dma-mapping.h> | |
20 | #include <linux/usb/chipidea.h> | |
21 | #include <linux/clk.h> | |
15302800 RZ |
22 | |
23 | #include "ci.h" | |
8e22978c | 24 | #include "ci_hdrc_imx.h" |
15302800 | 25 | |
8e22978c | 26 | struct ci_hdrc_imx_data { |
15302800 RZ |
27 | struct usb_phy *phy; |
28 | struct platform_device *ci_pdev; | |
29 | struct clk *clk; | |
15302800 RZ |
30 | }; |
31 | ||
d142d6be RZ |
32 | static const struct usbmisc_ops *usbmisc_ops; |
33 | ||
34 | /* Common functions shared by usbmisc drivers */ | |
35 | ||
36 | int usbmisc_set_ops(const struct usbmisc_ops *ops) | |
37 | { | |
38 | if (usbmisc_ops) | |
39 | return -EBUSY; | |
40 | ||
41 | usbmisc_ops = ops; | |
42 | ||
43 | return 0; | |
44 | } | |
45 | EXPORT_SYMBOL_GPL(usbmisc_set_ops); | |
46 | ||
47 | void usbmisc_unset_ops(const struct usbmisc_ops *ops) | |
48 | { | |
49 | usbmisc_ops = NULL; | |
50 | } | |
51 | EXPORT_SYMBOL_GPL(usbmisc_unset_ops); | |
52 | ||
53 | int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) | |
54 | { | |
55 | struct device_node *np = dev->of_node; | |
56 | struct of_phandle_args args; | |
57 | int ret; | |
58 | ||
59 | usbdev->dev = dev; | |
60 | ||
61 | ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells", | |
62 | 0, &args); | |
63 | if (ret) { | |
64 | dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n", | |
65 | ret); | |
66 | memset(usbdev, 0, sizeof(*usbdev)); | |
67 | return ret; | |
68 | } | |
69 | usbdev->index = args.args[0]; | |
70 | of_node_put(args.np); | |
71 | ||
72 | if (of_find_property(np, "disable-over-current", NULL)) | |
73 | usbdev->disable_oc = 1; | |
74 | ||
a0685330 MG |
75 | if (of_find_property(np, "external-vbus-divider", NULL)) |
76 | usbdev->evdo = 1; | |
77 | ||
d142d6be RZ |
78 | return 0; |
79 | } | |
80 | EXPORT_SYMBOL_GPL(usbmisc_get_init_data); | |
81 | ||
82 | /* End of common functions shared by usbmisc drivers*/ | |
83 | ||
8e22978c | 84 | static int ci_hdrc_imx_probe(struct platform_device *pdev) |
15302800 | 85 | { |
8e22978c AS |
86 | struct ci_hdrc_imx_data *data; |
87 | struct ci_hdrc_platform_data pdata = { | |
88 | .name = "ci_hdrc_imx", | |
f6a3b3a3 | 89 | .capoffset = DEF_CAPOFFSET, |
8e22978c | 90 | .flags = CI_HDRC_REQUIRE_TRANSCEIVER | |
8e22978c | 91 | CI_HDRC_DISABLE_STREAMING, |
f6a3b3a3 | 92 | }; |
15302800 RZ |
93 | int ret; |
94 | ||
d142d6be RZ |
95 | if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL) |
96 | && !usbmisc_ops) | |
97 | return -EPROBE_DEFER; | |
98 | ||
15302800 RZ |
99 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
100 | if (!data) { | |
8e22978c | 101 | dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n"); |
15302800 RZ |
102 | return -ENOMEM; |
103 | } | |
104 | ||
15302800 RZ |
105 | data->clk = devm_clk_get(&pdev->dev, NULL); |
106 | if (IS_ERR(data->clk)) { | |
107 | dev_err(&pdev->dev, | |
108 | "Failed to get clock, err=%ld\n", PTR_ERR(data->clk)); | |
109 | return PTR_ERR(data->clk); | |
110 | } | |
111 | ||
112 | ret = clk_prepare_enable(data->clk); | |
113 | if (ret) { | |
114 | dev_err(&pdev->dev, | |
115 | "Failed to prepare or enable clock, err=%d\n", ret); | |
116 | return ret; | |
117 | } | |
118 | ||
046916de FE |
119 | data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0); |
120 | if (!IS_ERR(data->phy)) { | |
121 | ret = usb_phy_init(data->phy); | |
ea1418b5 SH |
122 | if (ret) { |
123 | dev_err(&pdev->dev, "unable to init phy: %d\n", ret); | |
124 | goto err_clk; | |
15302800 | 125 | } |
046916de | 126 | } else if (PTR_ERR(data->phy) == -EPROBE_DEFER) { |
ea1418b5 SH |
127 | ret = -EPROBE_DEFER; |
128 | goto err_clk; | |
15302800 RZ |
129 | } |
130 | ||
f6a3b3a3 | 131 | pdata.phy = data->phy; |
15302800 | 132 | |
3b9561e9 SW |
133 | if (!pdev->dev.dma_mask) |
134 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; | |
135 | if (!pdev->dev.coherent_dma_mask) | |
136 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
d142d6be RZ |
137 | |
138 | if (usbmisc_ops && usbmisc_ops->init) { | |
139 | ret = usbmisc_ops->init(&pdev->dev); | |
140 | if (ret) { | |
141 | dev_err(&pdev->dev, | |
142 | "usbmisc init failed, ret=%d\n", ret); | |
1542d9c3 | 143 | goto err_clk; |
d142d6be RZ |
144 | } |
145 | } | |
146 | ||
8e22978c | 147 | data->ci_pdev = ci_hdrc_add_device(&pdev->dev, |
15302800 | 148 | pdev->resource, pdev->num_resources, |
f6a3b3a3 | 149 | &pdata); |
770719df FE |
150 | if (IS_ERR(data->ci_pdev)) { |
151 | ret = PTR_ERR(data->ci_pdev); | |
15302800 RZ |
152 | dev_err(&pdev->dev, |
153 | "Can't register ci_hdrc platform device, err=%d\n", | |
154 | ret); | |
1542d9c3 | 155 | goto err_clk; |
15302800 RZ |
156 | } |
157 | ||
a0685330 MG |
158 | if (usbmisc_ops && usbmisc_ops->post) { |
159 | ret = usbmisc_ops->post(&pdev->dev); | |
160 | if (ret) { | |
161 | dev_err(&pdev->dev, | |
162 | "usbmisc post failed, ret=%d\n", ret); | |
770719df | 163 | goto disable_device; |
a0685330 MG |
164 | } |
165 | } | |
166 | ||
15302800 RZ |
167 | platform_set_drvdata(pdev, data); |
168 | ||
169 | pm_runtime_no_callbacks(&pdev->dev); | |
170 | pm_runtime_enable(&pdev->dev); | |
171 | ||
172 | return 0; | |
173 | ||
770719df | 174 | disable_device: |
8e22978c | 175 | ci_hdrc_remove_device(data->ci_pdev); |
ea1418b5 | 176 | err_clk: |
15302800 RZ |
177 | clk_disable_unprepare(data->clk); |
178 | return ret; | |
179 | } | |
180 | ||
8e22978c | 181 | static int ci_hdrc_imx_remove(struct platform_device *pdev) |
15302800 | 182 | { |
8e22978c | 183 | struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev); |
15302800 RZ |
184 | |
185 | pm_runtime_disable(&pdev->dev); | |
8e22978c | 186 | ci_hdrc_remove_device(data->ci_pdev); |
15302800 | 187 | |
769d92c4 | 188 | if (data->phy) |
15302800 | 189 | usb_phy_shutdown(data->phy); |
15302800 | 190 | |
15302800 RZ |
191 | clk_disable_unprepare(data->clk); |
192 | ||
15302800 RZ |
193 | return 0; |
194 | } | |
195 | ||
8e22978c | 196 | static const struct of_device_id ci_hdrc_imx_dt_ids[] = { |
15302800 RZ |
197 | { .compatible = "fsl,imx27-usb", }, |
198 | { /* sentinel */ } | |
199 | }; | |
8e22978c | 200 | MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids); |
15302800 | 201 | |
8e22978c AS |
202 | static struct platform_driver ci_hdrc_imx_driver = { |
203 | .probe = ci_hdrc_imx_probe, | |
204 | .remove = ci_hdrc_imx_remove, | |
15302800 RZ |
205 | .driver = { |
206 | .name = "imx_usb", | |
207 | .owner = THIS_MODULE, | |
8e22978c | 208 | .of_match_table = ci_hdrc_imx_dt_ids, |
15302800 RZ |
209 | }, |
210 | }; | |
211 | ||
8e22978c | 212 | module_platform_driver(ci_hdrc_imx_driver); |
15302800 RZ |
213 | |
214 | MODULE_ALIAS("platform:imx-usb"); | |
215 | MODULE_LICENSE("GPL v2"); | |
8e22978c | 216 | MODULE_DESCRIPTION("CI HDRC i.MX USB binding"); |
15302800 RZ |
217 | MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); |
218 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |