[deliverable/linux.git] / drivers / usb / musb / ux500.c

/*
 * Copyright (C) 2010 ST-Ericsson AB
 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
 *
 * Based on omap2430.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>

#include "musb_core.h"

struct ux500_glue {
	struct device		*dev;
	struct platform_device	*musb;
	struct clk		*clk;
};
#define glue_to_musb(g)	platform_get_drvdata(g->musb)

static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
{
	unsigned long   flags;
	irqreturn_t     retval = IRQ_NONE;
	struct musb     *musb = __hci;

	spin_lock_irqsave(&musb->lock, flags);

	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);

	if (musb->int_usb || musb->int_tx || musb->int_rx)
		retval = musb_interrupt(musb);

	spin_unlock_irqrestore(&musb->lock, flags);

	return retval;
}

static int ux500_musb_init(struct musb *musb)
{
	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
	if (IS_ERR_OR_NULL(musb->xceiv)) {
		pr_err("HS USB OTG: no transceiver configured\n");
		return -ENODEV;
	}

	musb->isr = ux500_musb_interrupt;

	return 0;
}

static int ux500_musb_exit(struct musb *musb)
{
	usb_put_phy(musb->xceiv);

	return 0;
}

static const struct musb_platform_ops ux500_ops = {
	.init		= ux500_musb_init,
	.exit		= ux500_musb_exit,
};

static int ux500_probe(struct platform_device *pdev)
{
	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;
	struct platform_device		*musb;
	struct ux500_glue		*glue;
	struct clk			*clk;
	int				ret = -ENOMEM;

	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	if (!glue) {
		dev_err(&pdev->dev, "failed to allocate glue context\n");
		goto err0;
	}

	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
	if (!musb) {
		dev_err(&pdev->dev, "failed to allocate musb device\n");
		goto err1;
	}

	clk = clk_get(&pdev->dev, "usb");
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "failed to get clock\n");
		ret = PTR_ERR(clk);
		goto err3;
	}

	ret = clk_prepare_enable(clk);
	if (ret) {
		dev_err(&pdev->dev, "failed to enable clock\n");
		goto err4;
	}

	musb->dev.parent		= &pdev->dev;
	musb->dev.dma_mask		= pdev->dev.dma_mask;
	musb->dev.coherent_dma_mask	= pdev->dev.coherent_dma_mask;

	glue->dev			= &pdev->dev;
	glue->musb			= musb;
	glue->clk			= clk;

	pdata->platform_ops		= &ux500_ops;

	platform_set_drvdata(pdev, glue);

	ret = platform_device_add_resources(musb, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(&pdev->dev, "failed to add resources\n");
		goto err5;
	}

	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	if (ret) {
		dev_err(&pdev->dev, "failed to add platform_data\n");
		goto err5;
	}

	ret = platform_device_add(musb);
	if (ret) {
		dev_err(&pdev->dev, "failed to register musb device\n");
		goto err5;
	}

	return 0;

err5:
	clk_disable_unprepare(clk);

err4:
	clk_put(clk);

err3:
	platform_device_put(musb);

err1:
	kfree(glue);

err0:
	return ret;
}

static int ux500_remove(struct platform_device *pdev)
{
	struct ux500_glue	*glue = platform_get_drvdata(pdev);

	platform_device_unregister(glue->musb);
	clk_disable_unprepare(glue->clk);
	clk_put(glue->clk);
	kfree(glue);

	return 0;
}

#ifdef CONFIG_PM
static int ux500_suspend(struct device *dev)
{
	struct ux500_glue	*glue = dev_get_drvdata(dev);
	struct musb		*musb = glue_to_musb(glue);

	usb_phy_set_suspend(musb->xceiv, 1);
	clk_disable_unprepare(glue->clk);

	return 0;
}

static int ux500_resume(struct device *dev)
{
	struct ux500_glue	*glue = dev_get_drvdata(dev);
	struct musb		*musb = glue_to_musb(glue);
	int			ret;

	ret = clk_prepare_enable(glue->clk);
	if (ret) {
		dev_err(dev, "failed to enable clock\n");
		return ret;
	}

	usb_phy_set_suspend(musb->xceiv, 0);

	return 0;
}

static const struct dev_pm_ops ux500_pm_ops = {
	.suspend	= ux500_suspend,
	.resume		= ux500_resume,
};

#define DEV_PM_OPS	(&ux500_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif

static struct platform_driver ux500_driver = {
	.probe		= ux500_probe,
	.remove		= ux500_remove,
	.driver		= {
		.name	= "musb-ux500",
		.pm	= DEV_PM_OPS,
	},
};

MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
MODULE_LICENSE("GPL v2");
module_platform_driver(ux500_driver);
Commit	Line	Data
4bc36fd3 MYK	1	/*
	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>
ded017ee	26	#include <linux/err.h>
4bc36fd3 MYK	27	#include <linux/io.h>
	28	#include <linux/platform_device.h>
	29
	30	#include "musb_core.h"
	31
	32	struct ux500_glue {
	33	struct device *dev;
	34	struct platform_device *musb;
	35	struct clk *clk;
	36	};
	37	#define glue_to_musb(g) platform_get_drvdata(g->musb)
	38
baef653a PDS	39	static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
	40	{
	41	unsigned long flags;
	42	irqreturn_t retval = IRQ_NONE;
	43	struct musb *musb = __hci;
	44
	45	spin_lock_irqsave(&musb->lock, flags);
	46
	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);
	50
	51	if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
	52	retval = musb_interrupt(musb);
	53
	54	spin_unlock_irqrestore(&musb->lock, flags);
	55
	56	return retval;
	57	}
	58
4bc36fd3 MYK	59	static int ux500_musb_init(struct musb *musb)
4bc36fd3 MYK	60	{
662dca54	61	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee	62	if (IS_ERR_OR_NULL(musb->xceiv)) {
4bc36fd3 MYK	63	pr_err("HS USB OTG: no transceiver configured\n");
	64	return -ENODEV;
	65	}
	66
baef653a PDS	67	musb->isr = ux500_musb_interrupt;
baef653a PDS	68
4bc36fd3 MYK	69	return 0;
	70	}
	71
	72	static int ux500_musb_exit(struct musb *musb)
	73	{
721002ec	74	usb_put_phy(musb->xceiv);
4bc36fd3 MYK	75
	76	return 0;
	77	}
	78
	79	static const struct musb_platform_ops ux500_ops = {
	80	.init = ux500_musb_init,
	81	.exit = ux500_musb_exit,
	82	};
	83
41ac7b3a	84	static int ux500_probe(struct platform_device *pdev)
4bc36fd3 MYK	85	{
	86	struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
	87	struct platform_device *musb;
	88	struct ux500_glue *glue;
	89	struct clk *clk;
4bc36fd3 MYK	90	int ret = -ENOMEM;
	91
	92	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
	93	if (!glue) {
	94	dev_err(&pdev->dev, "failed to allocate glue context\n");
	95	goto err0;
	96	}
	97
2f771164	98	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
4bc36fd3 MYK	99	if (!musb) {
4bc36fd3 MYK	100	dev_err(&pdev->dev, "failed to allocate musb device\n");
2f771164	101	goto err1;
4bc36fd3 MYK	102	}
	103
	104	clk = clk_get(&pdev->dev, "usb");
	105	if (IS_ERR(clk)) {
	106	dev_err(&pdev->dev, "failed to get clock\n");
	107	ret = PTR_ERR(clk);
65b3d52d	108	goto err3;
4bc36fd3 MYK	109	}
4bc36fd3 MYK	110
99d17cfa	111	ret = clk_prepare_enable(clk);
4bc36fd3 MYK	112	if (ret) {
4bc36fd3 MYK	113	dev_err(&pdev->dev, "failed to enable clock\n");
65b3d52d	114	goto err4;
4bc36fd3 MYK	115	}
	116
	117	musb->dev.parent = &pdev->dev;
87266064 MYK	118	musb->dev.dma_mask = pdev->dev.dma_mask;
87266064 MYK	119	musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
4bc36fd3 MYK	120
	121	glue->dev = &pdev->dev;
	122	glue->musb = musb;
	123	glue->clk = clk;
	124
	125	pdata->platform_ops = &ux500_ops;
	126
	127	platform_set_drvdata(pdev, glue);
	128
	129	ret = platform_device_add_resources(musb, pdev->resource,
	130	pdev->num_resources);
	131	if (ret) {
	132	dev_err(&pdev->dev, "failed to add resources\n");
65b3d52d	133	goto err5;
4bc36fd3 MYK	134	}
	135
	136	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
	137	if (ret) {
	138	dev_err(&pdev->dev, "failed to add platform_data\n");
65b3d52d	139	goto err5;
4bc36fd3 MYK	140	}
	141
	142	ret = platform_device_add(musb);
	143	if (ret) {
	144	dev_err(&pdev->dev, "failed to register musb device\n");
65b3d52d	145	goto err5;
4bc36fd3 MYK	146	}
	147
	148	return 0;
	149
65b3d52d	150	err5:
99d17cfa	151	clk_disable_unprepare(clk);
4bc36fd3	152
65b3d52d	153	err4:
4bc36fd3 MYK	154	clk_put(clk);
4bc36fd3 MYK	155
65b3d52d	156	err3:
4bc36fd3 MYK	157	platform_device_put(musb);
	158
	159	err1:
	160	kfree(glue);
	161
	162	err0:
	163	return ret;
	164	}
	165
fb4e98ab	166	static int ux500_remove(struct platform_device *pdev)
4bc36fd3 MYK	167	{
	168	struct ux500_glue *glue = platform_get_drvdata(pdev);
	169
4b0de6f3	170	platform_device_unregister(glue->musb);
99d17cfa	171	clk_disable_unprepare(glue->clk);
4bc36fd3 MYK	172	clk_put(glue->clk);
	173	kfree(glue);
	174
	175	return 0;
	176	}
	177
	178	#ifdef CONFIG_PM
	179	static int ux500_suspend(struct device *dev)
	180	{
	181	struct ux500_glue *glue = dev_get_drvdata(dev);
	182	struct musb *musb = glue_to_musb(glue);
	183
b96d3b08	184	usb_phy_set_suspend(musb->xceiv, 1);
99d17cfa	185	clk_disable_unprepare(glue->clk);
4bc36fd3 MYK	186
	187	return 0;
	188	}
	189
	190	static int ux500_resume(struct device *dev)
	191	{
	192	struct ux500_glue *glue = dev_get_drvdata(dev);
	193	struct musb *musb = glue_to_musb(glue);
	194	int ret;
	195
99d17cfa	196	ret = clk_prepare_enable(glue->clk);
4bc36fd3 MYK	197	if (ret) {
	198	dev_err(dev, "failed to enable clock\n");
	199	return ret;
	200	}
	201
b96d3b08	202	usb_phy_set_suspend(musb->xceiv, 0);
4bc36fd3 MYK	203
	204	return 0;
	205	}
	206
	207	static const struct dev_pm_ops ux500_pm_ops = {
	208	.suspend = ux500_suspend,
	209	.resume = ux500_resume,
	210	};
	211
	212	#define DEV_PM_OPS (&ux500_pm_ops)
	213	#else
	214	#define DEV_PM_OPS NULL
	215	#endif
	216
	217	static struct platform_driver ux500_driver = {
e9e8c85e	218	.probe = ux500_probe,
7690417d	219	.remove = ux500_remove,
4bc36fd3 MYK	220	.driver = {
	221	.name = "musb-ux500",
	222	.pm = DEV_PM_OPS,
	223	},
	224	};
	225
	226	MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
	227	MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
	228	MODULE_LICENSE("GPL v2");
0e7090a6	229	module_platform_driver(ux500_driver);