blob: d6384e4aeef96ba77448fa048cbc6560a4d2353d [file] [log] [blame]
Mian Yousaf Kaukab4bc36fd2010-12-09 13:05:01 +01001/*
2 * Copyright (C) 2010 ST-Ericsson AB
3 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
4 *
5 * Based on omap2430.c
6 *
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.
11 *
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.
16 *
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.
20 */
21
22#include <linux/module.h>
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/clk.h>
26#include <linux/io.h>
27#include <linux/platform_device.h>
28
29#include "musb_core.h"
30
31struct ux500_glue {
32 struct device *dev;
33 struct platform_device *musb;
34 struct clk *clk;
35};
36#define glue_to_musb(g) platform_get_drvdata(g->musb)
37
38static int ux500_musb_init(struct musb *musb)
39{
40 musb->xceiv = otg_get_transceiver();
41 if (!musb->xceiv) {
42 pr_err("HS USB OTG: no transceiver configured\n");
43 return -ENODEV;
44 }
45
46 return 0;
47}
48
49static int ux500_musb_exit(struct musb *musb)
50{
51 otg_put_transceiver(musb->xceiv);
52
53 return 0;
54}
55
56static const struct musb_platform_ops ux500_ops = {
57 .init = ux500_musb_init,
58 .exit = ux500_musb_exit,
59};
60
61static int __init ux500_probe(struct platform_device *pdev)
62{
63 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
64 struct platform_device *musb;
65 struct ux500_glue *glue;
66 struct clk *clk;
67
68 int ret = -ENOMEM;
69
70 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
71 if (!glue) {
72 dev_err(&pdev->dev, "failed to allocate glue context\n");
73 goto err0;
74 }
75
76 musb = platform_device_alloc("musb-hdrc", -1);
77 if (!musb) {
78 dev_err(&pdev->dev, "failed to allocate musb device\n");
79 goto err1;
80 }
81
82 clk = clk_get(&pdev->dev, "usb");
83 if (IS_ERR(clk)) {
84 dev_err(&pdev->dev, "failed to get clock\n");
85 ret = PTR_ERR(clk);
86 goto err2;
87 }
88
89 ret = clk_enable(clk);
90 if (ret) {
91 dev_err(&pdev->dev, "failed to enable clock\n");
92 goto err3;
93 }
94
95 musb->dev.parent = &pdev->dev;
96
97 glue->dev = &pdev->dev;
98 glue->musb = musb;
99 glue->clk = clk;
100
101 pdata->platform_ops = &ux500_ops;
102
103 platform_set_drvdata(pdev, glue);
104
105 ret = platform_device_add_resources(musb, pdev->resource,
106 pdev->num_resources);
107 if (ret) {
108 dev_err(&pdev->dev, "failed to add resources\n");
109 goto err4;
110 }
111
112 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
113 if (ret) {
114 dev_err(&pdev->dev, "failed to add platform_data\n");
115 goto err4;
116 }
117
118 ret = platform_device_add(musb);
119 if (ret) {
120 dev_err(&pdev->dev, "failed to register musb device\n");
121 goto err4;
122 }
123
124 return 0;
125
126err4:
127 clk_disable(clk);
128
129err3:
130 clk_put(clk);
131
132err2:
133 platform_device_put(musb);
134
135err1:
136 kfree(glue);
137
138err0:
139 return ret;
140}
141
142static int __exit ux500_remove(struct platform_device *pdev)
143{
144 struct ux500_glue *glue = platform_get_drvdata(pdev);
145
146 platform_device_del(glue->musb);
147 platform_device_put(glue->musb);
148 clk_disable(glue->clk);
149 clk_put(glue->clk);
150 kfree(glue);
151
152 return 0;
153}
154
155#ifdef CONFIG_PM
156static int ux500_suspend(struct device *dev)
157{
158 struct ux500_glue *glue = dev_get_drvdata(dev);
159 struct musb *musb = glue_to_musb(glue);
160
161 otg_set_suspend(musb->xceiv, 1);
162 clk_disable(glue->clk);
163
164 return 0;
165}
166
167static int ux500_resume(struct device *dev)
168{
169 struct ux500_glue *glue = dev_get_drvdata(dev);
170 struct musb *musb = glue_to_musb(glue);
171 int ret;
172
173 ret = clk_enable(glue->clk);
174 if (ret) {
175 dev_err(dev, "failed to enable clock\n");
176 return ret;
177 }
178
179 otg_set_suspend(musb->xceiv, 0);
180
181 return 0;
182}
183
184static const struct dev_pm_ops ux500_pm_ops = {
185 .suspend = ux500_suspend,
186 .resume = ux500_resume,
187};
188
189#define DEV_PM_OPS (&ux500_pm_ops)
190#else
191#define DEV_PM_OPS NULL
192#endif
193
194static struct platform_driver ux500_driver = {
195 .remove = __exit_p(ux500_remove),
196 .driver = {
197 .name = "musb-ux500",
198 .pm = DEV_PM_OPS,
199 },
200};
201
202MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
203MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
204MODULE_LICENSE("GPL v2");
205
206static int __init ux500_init(void)
207{
208 return platform_driver_probe(&ux500_driver, ux500_probe);
209}
210subsys_initcall(ux500_init);
211
212static void __exit ux500_exit(void)
213{
214 platform_driver_unregister(&ux500_driver);
215}
216module_exit(ux500_exit);