2 * Copyright 2012 Freescale Semiconductor, Inc.
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
12 #include <linux/module.h>
13 #include <linux/of_platform.h>
14 #include <linux/clk.h>
15 #include <linux/err.h>
18 #include "ci13xxx_imx.h"
22 #define BM_OVER_CUR_DIS BIT(7)
24 struct imx6q_usbmisc {
28 struct usbmisc_usb_device usbdev[USB_DEV_MAX];
31 static struct imx6q_usbmisc *usbmisc;
33 static struct usbmisc_usb_device *get_usbdev(struct device *dev)
37 for (i = 0; i < USB_DEV_MAX; i++) {
38 if (usbmisc->usbdev[i].dev == dev)
39 return &usbmisc->usbdev[i];
40 else if (!usbmisc->usbdev[i].dev)
45 return ERR_PTR(-EBUSY);
47 ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]);
51 return &usbmisc->usbdev[i];
54 static int usbmisc_imx6q_init(struct device *dev)
57 struct usbmisc_usb_device *usbdev;
61 usbdev = get_usbdev(dev);
63 return PTR_ERR(usbdev);
65 if (usbdev->disable_oc) {
66 spin_lock_irqsave(&usbmisc->lock, flags);
67 reg = readl(usbmisc->base + usbdev->index * 4);
68 writel(reg | BM_OVER_CUR_DIS,
69 usbmisc->base + usbdev->index * 4);
70 spin_unlock_irqrestore(&usbmisc->lock, flags);
76 static const struct usbmisc_ops imx6q_usbmisc_ops = {
77 .init = usbmisc_imx6q_init,
80 static const struct of_device_id usbmisc_imx6q_dt_ids[] = {
81 { .compatible = "fsl,imx6q-usbmisc"},
85 static int usbmisc_imx6q_probe(struct platform_device *pdev)
88 struct imx6q_usbmisc *data;
94 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
98 spin_lock_init(&data->lock);
100 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
101 data->base = devm_request_and_ioremap(&pdev->dev, res);
103 return -EADDRNOTAVAIL;
105 data->clk = devm_clk_get(&pdev->dev, NULL);
106 if (IS_ERR(data->clk)) {
108 "failed to get clock, err=%ld\n", PTR_ERR(data->clk));
109 return PTR_ERR(data->clk);
112 ret = clk_prepare_enable(data->clk);
115 "clk_prepare_enable failed, err=%d\n", ret);
119 ret = usbmisc_set_ops(&imx6q_usbmisc_ops);
121 clk_disable_unprepare(data->clk);
130 static int usbmisc_imx6q_remove(struct platform_device *pdev)
132 usbmisc_unset_ops(&imx6q_usbmisc_ops);
133 clk_disable_unprepare(usbmisc->clk);
137 static struct platform_driver usbmisc_imx6q_driver = {
138 .probe = usbmisc_imx6q_probe,
139 .remove = usbmisc_imx6q_remove,
141 .name = "usbmisc_imx6q",
142 .owner = THIS_MODULE,
143 .of_match_table = usbmisc_imx6q_dt_ids,
147 int __init usbmisc_imx6q_drv_init(void)
149 return platform_driver_register(&usbmisc_imx6q_driver);
151 subsys_initcall(usbmisc_imx6q_drv_init);
153 void __exit usbmisc_imx6q_drv_exit(void)
155 platform_driver_unregister(&usbmisc_imx6q_driver);
157 module_exit(usbmisc_imx6q_drv_exit);
159 MODULE_ALIAS("platform:usbmisc-imx6q");
160 MODULE_LICENSE("GPL v2");
161 MODULE_DESCRIPTION("driver for imx6q usb non-core registers");
162 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");