2 * Copyright 2012 Freescale Semiconductor, Inc.
3 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
4 * on behalf of DENX Software Engineering GmbH
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:
10 * http://www.opensource.org/licenses/gpl-license.html
11 * http://www.gnu.org/copyleft/gpl.html
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>
24 #include "ci_hdrc_imx.h"
26 struct ci_hdrc_imx_data {
28 struct platform_device *ci_pdev;
30 struct imx_usbmisc_data *usbmisc_data;
33 /* Common functions shared by usbmisc drivers */
35 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
37 struct device_node *np = dev->of_node;
38 struct of_phandle_args args;
39 struct imx_usbmisc_data *data;
43 * In case the fsl,usbmisc property is not present this device doesn't
44 * need usbmisc. Return NULL (which is no error here)
46 if (!of_get_property(np, "fsl,usbmisc", NULL))
49 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
51 return ERR_PTR(-ENOMEM);
53 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
56 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
61 data->index = args.args[0];
64 if (of_find_property(np, "disable-over-current", NULL))
67 if (of_find_property(np, "external-vbus-divider", NULL))
73 /* End of common functions shared by usbmisc drivers*/
75 static int ci_hdrc_imx_probe(struct platform_device *pdev)
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,
86 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
88 dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
92 data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
93 if (IS_ERR(data->usbmisc_data))
94 return PTR_ERR(data->usbmisc_data);
96 data->clk = devm_clk_get(&pdev->dev, NULL);
97 if (IS_ERR(data->clk)) {
99 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
100 return PTR_ERR(data->clk);
103 ret = clk_prepare_enable(data->clk);
106 "Failed to prepare or enable clock, err=%d\n", ret);
110 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
111 if (!IS_ERR(data->phy)) {
112 ret = usb_phy_init(data->phy);
114 dev_err(&pdev->dev, "unable to init phy: %d\n", ret);
117 } else if (PTR_ERR(data->phy) == -EPROBE_DEFER) {
122 pdata.phy = data->phy;
124 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
128 if (data->usbmisc_data) {
129 ret = imx_usbmisc_init(data->usbmisc_data);
131 dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
137 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
138 pdev->resource, pdev->num_resources,
140 if (IS_ERR(data->ci_pdev)) {
141 ret = PTR_ERR(data->ci_pdev);
143 "Can't register ci_hdrc platform device, err=%d\n",
148 if (data->usbmisc_data) {
149 ret = imx_usbmisc_init_post(data->usbmisc_data);
151 dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
157 platform_set_drvdata(pdev, data);
159 pm_runtime_no_callbacks(&pdev->dev);
160 pm_runtime_enable(&pdev->dev);
165 ci_hdrc_remove_device(data->ci_pdev);
168 usb_phy_shutdown(data->phy);
170 clk_disable_unprepare(data->clk);
174 static int ci_hdrc_imx_remove(struct platform_device *pdev)
176 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
178 pm_runtime_disable(&pdev->dev);
179 ci_hdrc_remove_device(data->ci_pdev);
182 usb_phy_shutdown(data->phy);
184 clk_disable_unprepare(data->clk);
189 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
190 { .compatible = "fsl,imx27-usb", },
193 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
195 static struct platform_driver ci_hdrc_imx_driver = {
196 .probe = ci_hdrc_imx_probe,
197 .remove = ci_hdrc_imx_remove,
200 .owner = THIS_MODULE,
201 .of_match_table = ci_hdrc_imx_dt_ids,
205 module_platform_driver(ci_hdrc_imx_driver);
207 MODULE_ALIAS("platform:imx-usb");
208 MODULE_LICENSE("GPL v2");
209 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
210 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
211 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");