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>
26 #include <linux/err.h>
28 #include <linux/platform_device.h>
30 #include "musb_core.h"
34 struct platform_device *musb;
37 #define glue_to_musb(g) platform_get_drvdata(g->musb)
39 static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
42 irqreturn_t retval = IRQ_NONE;
43 struct musb *musb = __hci;
45 spin_lock_irqsave(&musb->lock, flags);
47 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
48 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
49 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
51 if (musb->int_usb || musb->int_tx || musb->int_rx)
52 retval = musb_interrupt(musb);
54 spin_unlock_irqrestore(&musb->lock, flags);
59 static int ux500_musb_init(struct musb *musb)
61 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
62 if (IS_ERR_OR_NULL(musb->xceiv)) {
63 pr_err("HS USB OTG: no transceiver configured\n");
67 musb->isr = ux500_musb_interrupt;
72 static int ux500_musb_exit(struct musb *musb)
74 usb_put_phy(musb->xceiv);
79 static const struct musb_platform_ops ux500_ops = {
80 .init = ux500_musb_init,
81 .exit = ux500_musb_exit,
84 static int __devinit ux500_probe(struct platform_device *pdev)
86 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
87 struct platform_device *musb;
88 struct ux500_glue *glue;
92 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
94 dev_err(&pdev->dev, "failed to allocate glue context\n");
98 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
100 dev_err(&pdev->dev, "failed to allocate musb device\n");
104 clk = clk_get(&pdev->dev, "usb");
106 dev_err(&pdev->dev, "failed to get clock\n");
111 ret = clk_enable(clk);
113 dev_err(&pdev->dev, "failed to enable clock\n");
117 musb->dev.parent = &pdev->dev;
118 musb->dev.dma_mask = pdev->dev.dma_mask;
119 musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
121 glue->dev = &pdev->dev;
125 pdata->platform_ops = &ux500_ops;
127 platform_set_drvdata(pdev, glue);
129 ret = platform_device_add_resources(musb, pdev->resource,
130 pdev->num_resources);
132 dev_err(&pdev->dev, "failed to add resources\n");
136 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
138 dev_err(&pdev->dev, "failed to add platform_data\n");
142 ret = platform_device_add(musb);
144 dev_err(&pdev->dev, "failed to register musb device\n");
157 platform_device_put(musb);
166 static int __devexit ux500_remove(struct platform_device *pdev)
168 struct ux500_glue *glue = platform_get_drvdata(pdev);
170 platform_device_unregister(glue->musb);
171 clk_disable(glue->clk);
179 static int ux500_suspend(struct device *dev)
181 struct ux500_glue *glue = dev_get_drvdata(dev);
182 struct musb *musb = glue_to_musb(glue);
184 usb_phy_set_suspend(musb->xceiv, 1);
185 clk_disable(glue->clk);
190 static int ux500_resume(struct device *dev)
192 struct ux500_glue *glue = dev_get_drvdata(dev);
193 struct musb *musb = glue_to_musb(glue);
196 ret = clk_enable(glue->clk);
198 dev_err(dev, "failed to enable clock\n");
202 usb_phy_set_suspend(musb->xceiv, 0);
207 static const struct dev_pm_ops ux500_pm_ops = {
208 .suspend = ux500_suspend,
209 .resume = ux500_resume,
212 #define DEV_PM_OPS (&ux500_pm_ops)
214 #define DEV_PM_OPS NULL
217 static struct platform_driver ux500_driver = {
218 .probe = ux500_probe,
219 .remove = ux500_remove,
221 .name = "musb-ux500",
226 MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
227 MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
228 MODULE_LICENSE("GPL v2");
229 module_platform_driver(ux500_driver);