usb: chipidea: imx: remove PHY operations
[firefly-linux-kernel-4.4.55.git] / drivers / usb / chipidea / ci_hdrc_imx.c
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>
22
23 #include "ci.h"
24 #include "ci_hdrc_imx.h"
25
26 struct ci_hdrc_imx_data {
27         struct usb_phy *phy;
28         struct platform_device *ci_pdev;
29         struct clk *clk;
30         struct imx_usbmisc_data *usbmisc_data;
31 };
32
33 /* Common functions shared by usbmisc drivers */
34
35 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
36 {
37         struct device_node *np = dev->of_node;
38         struct of_phandle_args args;
39         struct imx_usbmisc_data *data;
40         int ret;
41
42         /*
43          * In case the fsl,usbmisc property is not present this device doesn't
44          * need usbmisc. Return NULL (which is no error here)
45          */
46         if (!of_get_property(np, "fsl,usbmisc", NULL))
47                 return NULL;
48
49         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
50         if (!data)
51                 return ERR_PTR(-ENOMEM);
52
53         ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
54                                         0, &args);
55         if (ret) {
56                 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
57                         ret);
58                 return ERR_PTR(ret);
59         }
60
61         data->index = args.args[0];
62         of_node_put(args.np);
63
64         if (of_find_property(np, "disable-over-current", NULL))
65                 data->disable_oc = 1;
66
67         if (of_find_property(np, "external-vbus-divider", NULL))
68                 data->evdo = 1;
69
70         return data;
71 }
72
73 /* End of common functions shared by usbmisc drivers*/
74
75 static int ci_hdrc_imx_probe(struct platform_device *pdev)
76 {
77         struct ci_hdrc_imx_data *data;
78         struct ci_hdrc_platform_data pdata = {
79                 .name           = "ci_hdrc_imx",
80                 .capoffset      = DEF_CAPOFFSET,
81                 .flags          = CI_HDRC_REQUIRE_TRANSCEIVER |
82                                   CI_HDRC_DISABLE_STREAMING,
83         };
84         int ret;
85
86         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
87         if (!data) {
88                 dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
89                 return -ENOMEM;
90         }
91
92         data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
93         if (IS_ERR(data->usbmisc_data))
94                 return PTR_ERR(data->usbmisc_data);
95
96         data->clk = devm_clk_get(&pdev->dev, NULL);
97         if (IS_ERR(data->clk)) {
98                 dev_err(&pdev->dev,
99                         "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
100                 return PTR_ERR(data->clk);
101         }
102
103         ret = clk_prepare_enable(data->clk);
104         if (ret) {
105                 dev_err(&pdev->dev,
106                         "Failed to prepare or enable clock, err=%d\n", ret);
107                 return ret;
108         }
109
110         data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
111         if (IS_ERR(data->phy)) {
112                 ret = PTR_ERR(data->phy);
113                 goto err_clk;
114         }
115
116         pdata.phy = data->phy;
117
118         if (!pdev->dev.dma_mask)
119                 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
120         if (!pdev->dev.coherent_dma_mask)
121                 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
122
123         if (data->usbmisc_data) {
124                 ret = imx_usbmisc_init(data->usbmisc_data);
125                 if (ret) {
126                         dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
127                                         ret);
128                         goto err_clk;
129                 }
130         }
131
132         data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
133                                 pdev->resource, pdev->num_resources,
134                                 &pdata);
135         if (IS_ERR(data->ci_pdev)) {
136                 ret = PTR_ERR(data->ci_pdev);
137                 dev_err(&pdev->dev,
138                         "Can't register ci_hdrc platform device, err=%d\n",
139                         ret);
140                 goto err_clk;
141         }
142
143         if (data->usbmisc_data) {
144                 ret = imx_usbmisc_init_post(data->usbmisc_data);
145                 if (ret) {
146                         dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
147                                         ret);
148                         goto disable_device;
149                 }
150         }
151
152         platform_set_drvdata(pdev, data);
153
154         pm_runtime_no_callbacks(&pdev->dev);
155         pm_runtime_enable(&pdev->dev);
156
157         return 0;
158
159 disable_device:
160         ci_hdrc_remove_device(data->ci_pdev);
161 err_clk:
162         clk_disable_unprepare(data->clk);
163         return ret;
164 }
165
166 static int ci_hdrc_imx_remove(struct platform_device *pdev)
167 {
168         struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
169
170         pm_runtime_disable(&pdev->dev);
171         ci_hdrc_remove_device(data->ci_pdev);
172         clk_disable_unprepare(data->clk);
173
174         return 0;
175 }
176
177 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
178         { .compatible = "fsl,imx27-usb", },
179         { /* sentinel */ }
180 };
181 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
182
183 static struct platform_driver ci_hdrc_imx_driver = {
184         .probe = ci_hdrc_imx_probe,
185         .remove = ci_hdrc_imx_remove,
186         .driver = {
187                 .name = "imx_usb",
188                 .owner = THIS_MODULE,
189                 .of_match_table = ci_hdrc_imx_dt_ids,
190          },
191 };
192
193 module_platform_driver(ci_hdrc_imx_driver);
194
195 MODULE_ALIAS("platform:imx-usb");
196 MODULE_LICENSE("GPL v2");
197 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
198 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
199 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");