2 * Copyright (C) 2010 ST-Ericsson AB
3 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/clk.h>
27 #include <linux/platform_device.h>
29 #include "musb_core.h"
33 struct platform_device *musb;
36 #define glue_to_musb(g) platform_get_drvdata(g->musb)
38 static int ux500_musb_init(struct musb *musb)
40 musb->xceiv = otg_get_transceiver();
42 pr_err("HS USB OTG: no transceiver configured\n");
49 static int ux500_musb_exit(struct musb *musb)
51 otg_put_transceiver(musb->xceiv);
56 static const struct musb_platform_ops ux500_ops = {
57 .init = ux500_musb_init,
58 .exit = ux500_musb_exit,
61 static int __init ux500_probe(struct platform_device *pdev)
63 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
64 struct platform_device *musb;
65 struct ux500_glue *glue;
70 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
72 dev_err(&pdev->dev, "failed to allocate glue context\n");
76 musb = platform_device_alloc("musb-hdrc", -1);
78 dev_err(&pdev->dev, "failed to allocate musb device\n");
82 clk = clk_get(&pdev->dev, "usb");
84 dev_err(&pdev->dev, "failed to get clock\n");
89 ret = clk_enable(clk);
91 dev_err(&pdev->dev, "failed to enable clock\n");
95 musb->dev.parent = &pdev->dev;
97 glue->dev = &pdev->dev;
101 pdata->platform_ops = &ux500_ops;
103 platform_set_drvdata(pdev, glue);
105 ret = platform_device_add_resources(musb, pdev->resource,
106 pdev->num_resources);
108 dev_err(&pdev->dev, "failed to add resources\n");
112 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
114 dev_err(&pdev->dev, "failed to add platform_data\n");
118 ret = platform_device_add(musb);
120 dev_err(&pdev->dev, "failed to register musb device\n");
133 platform_device_put(musb);
142 static int __exit ux500_remove(struct platform_device *pdev)
144 struct ux500_glue *glue = platform_get_drvdata(pdev);
146 platform_device_del(glue->musb);
147 platform_device_put(glue->musb);
148 clk_disable(glue->clk);
156 static int ux500_suspend(struct device *dev)
158 struct ux500_glue *glue = dev_get_drvdata(dev);
159 struct musb *musb = glue_to_musb(glue);
161 otg_set_suspend(musb->xceiv, 1);
162 clk_disable(glue->clk);
167 static int ux500_resume(struct device *dev)
169 struct ux500_glue *glue = dev_get_drvdata(dev);
170 struct musb *musb = glue_to_musb(glue);
173 ret = clk_enable(glue->clk);
175 dev_err(dev, "failed to enable clock\n");
179 otg_set_suspend(musb->xceiv, 0);
184 static const struct dev_pm_ops ux500_pm_ops = {
185 .suspend = ux500_suspend,
186 .resume = ux500_resume,
189 #define DEV_PM_OPS (&ux500_pm_ops)
191 #define DEV_PM_OPS NULL
194 static struct platform_driver ux500_driver = {
195 .remove = __exit_p(ux500_remove),
197 .name = "musb-ux500",
202 MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
203 MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
204 MODULE_LICENSE("GPL v2");
206 static int __init ux500_init(void)
208 return platform_driver_probe(&ux500_driver, ux500_probe);
210 subsys_initcall(ux500_init);
212 static void __exit ux500_exit(void)
214 platform_driver_unregister(&ux500_driver);
216 module_exit(ux500_exit);