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>
22 #include <linux/regulator/consumer.h>
25 #include "ci_hdrc_imx.h"
27 #define pdev_to_phy(pdev) \
28 ((struct usb_phy *)platform_get_drvdata(pdev))
30 struct ci_hdrc_imx_data {
32 struct platform_device *ci_pdev;
34 struct regulator *reg_vbus;
37 static const struct usbmisc_ops *usbmisc_ops;
39 /* Common functions shared by usbmisc drivers */
41 int usbmisc_set_ops(const struct usbmisc_ops *ops)
50 EXPORT_SYMBOL_GPL(usbmisc_set_ops);
52 void usbmisc_unset_ops(const struct usbmisc_ops *ops)
56 EXPORT_SYMBOL_GPL(usbmisc_unset_ops);
58 int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev)
60 struct device_node *np = dev->of_node;
61 struct of_phandle_args args;
66 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
69 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
71 memset(usbdev, 0, sizeof(*usbdev));
74 usbdev->index = args.args[0];
77 if (of_find_property(np, "disable-over-current", NULL))
78 usbdev->disable_oc = 1;
80 if (of_find_property(np, "external-vbus-divider", NULL))
85 EXPORT_SYMBOL_GPL(usbmisc_get_init_data);
87 /* End of common functions shared by usbmisc drivers*/
89 static int ci_hdrc_imx_probe(struct platform_device *pdev)
91 struct ci_hdrc_imx_data *data;
92 struct ci_hdrc_platform_data pdata = {
93 .name = "ci_hdrc_imx",
94 .capoffset = DEF_CAPOFFSET,
95 .flags = CI_HDRC_REQUIRE_TRANSCEIVER |
96 CI_HDRC_PULLUP_ON_VBUS |
97 CI_HDRC_DISABLE_STREAMING,
102 if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL)
104 return -EPROBE_DEFER;
106 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
108 dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
114 dev_err(&pdev->dev, "Can't get device resources!\n");
118 data->clk = devm_clk_get(&pdev->dev, NULL);
119 if (IS_ERR(data->clk)) {
121 "Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
122 return PTR_ERR(data->clk);
125 ret = clk_prepare_enable(data->clk);
128 "Failed to prepare or enable clock, err=%d\n", ret);
132 data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
133 if (!IS_ERR(data->phy)) {
134 ret = usb_phy_init(data->phy);
136 dev_err(&pdev->dev, "unable to init phy: %d\n", ret);
139 } else if (PTR_ERR(data->phy) == -EPROBE_DEFER) {
144 /* we only support host now, so enable vbus here */
145 data->reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
146 if (!IS_ERR(data->reg_vbus)) {
147 ret = regulator_enable(data->reg_vbus);
150 "Failed to enable vbus regulator, err=%d\n",
155 data->reg_vbus = NULL;
158 pdata.phy = data->phy;
160 if (!pdev->dev.dma_mask)
161 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
162 if (!pdev->dev.coherent_dma_mask)
163 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
165 if (usbmisc_ops && usbmisc_ops->init) {
166 ret = usbmisc_ops->init(&pdev->dev);
169 "usbmisc init failed, ret=%d\n", ret);
174 data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
175 pdev->resource, pdev->num_resources,
177 if (IS_ERR(data->ci_pdev)) {
178 ret = PTR_ERR(data->ci_pdev);
180 "Can't register ci_hdrc platform device, err=%d\n",
185 if (usbmisc_ops && usbmisc_ops->post) {
186 ret = usbmisc_ops->post(&pdev->dev);
189 "usbmisc post failed, ret=%d\n", ret);
194 platform_set_drvdata(pdev, data);
196 pm_runtime_no_callbacks(&pdev->dev);
197 pm_runtime_enable(&pdev->dev);
202 ci_hdrc_remove_device(data->ci_pdev);
205 regulator_disable(data->reg_vbus);
207 clk_disable_unprepare(data->clk);
211 static int ci_hdrc_imx_remove(struct platform_device *pdev)
213 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
215 pm_runtime_disable(&pdev->dev);
216 ci_hdrc_remove_device(data->ci_pdev);
219 regulator_disable(data->reg_vbus);
222 usb_phy_shutdown(data->phy);
223 module_put(data->phy->dev->driver->owner);
226 clk_disable_unprepare(data->clk);
231 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
232 { .compatible = "fsl,imx27-usb", },
235 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
237 static struct platform_driver ci_hdrc_imx_driver = {
238 .probe = ci_hdrc_imx_probe,
239 .remove = ci_hdrc_imx_remove,
242 .owner = THIS_MODULE,
243 .of_match_table = ci_hdrc_imx_dt_ids,
247 module_platform_driver(ci_hdrc_imx_driver);
249 MODULE_ALIAS("platform:imx-usb");
250 MODULE_LICENSE("GPL v2");
251 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
252 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
253 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");