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Commit 4bc36fd3 authored by Mian Yousaf Kaukab's avatar Mian Yousaf Kaukab Committed by Felipe Balbi
Browse files

usb: musb: add support for ux500 platform 



Initial support for u8500 and u5500 platform.

Signed-off-by: default avatarMian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Acked-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent a9c03783

drivers/usb/musb/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -60,6 +60,10 @@ config USB_MUSB_BLACKFIN 
	bool "Blackfin"

	depends on (BF54x && !BF544) || (BF52x && ! BF522 && !BF523)



config USB_MUSB_UX500

	bool "U8500 and U5500"

	depends on (ARCH_U8500 && AB8500_USB) || (ARCH_U5500)



endchoice



choice

drivers/usb/musb/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ obj-$(CONFIG_USB_MUSB_TUSB6010) += tusb6010.o 
obj-$(CONFIG_USB_MUSB_DAVINCI)			+= davinci.o

obj-$(CONFIG_USB_MUSB_DA8XX)			+= da8xx.o

obj-$(CONFIG_USB_MUSB_BLACKFIN)			+= blackfin.o

obj-$(CONFIG_USB_MUSB_UX500)			+= ux500.o



# the kconfig must guarantee that only one of the

# possible I/O schemes will be enabled at a time ...

drivers/usb/musb/musb_core.c

+4 −1
Original line number Diff line number Diff line
@@ -1069,6 +1069,8 @@ static void musb_shutdown(struct platform_device *pdev) 
#if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_OMAP2PLUS) \

	|| defined(CONFIG_USB_MUSB_AM35X)

static ushort __initdata fifo_mode = 4;

#elif defined(CONFIG_USB_MUSB_UX500)

static ushort __initdata fifo_mode = 5;

#else

static ushort __initdata fifo_mode = 2;

#endif
@@ -1539,7 +1541,8 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb) 
/*-------------------------------------------------------------------------*/



#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) || \

	defined(CONFIG_ARCH_OMAP4)

	defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_ARCH_U8500) || \

	defined(CONFIG_ARCH_U5500)



static irqreturn_t generic_interrupt(int irq, void *__hci)

{

drivers/usb/musb/ux500.c

0 → 100644
+216 −0
Original line number Diff line number Diff line 
/*

 * 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/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 int ux500_musb_init(struct musb *musb)

{

	musb->xceiv = otg_get_transceiver();

	if (!musb->xceiv) {

		pr_err("HS USB OTG: no transceiver configured\n");

		return -ENODEV;

	}



	return 0;

}



static int ux500_musb_exit(struct musb *musb)

{

	otg_put_transceiver(musb->xceiv);



	return 0;

}



static const struct musb_platform_ops ux500_ops = {

	.init		= ux500_musb_init,

	.exit		= ux500_musb_exit,

};



static int __init 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", -1);

	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 err2;

	}



	ret = clk_enable(clk);

	if (ret) {

		dev_err(&pdev->dev, "failed to enable clock\n");

		goto err3;

	}



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



	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 err4;

	}



	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));

	if (ret) {

		dev_err(&pdev->dev, "failed to add platform_data\n");

		goto err4;

	}



	ret = platform_device_add(musb);

	if (ret) {

		dev_err(&pdev->dev, "failed to register musb device\n");

		goto err4;

	}



	return 0;



err4:

	clk_disable(clk);



err3:

	clk_put(clk);



err2:

	platform_device_put(musb);



err1:

	kfree(glue);



err0:

	return ret;

}



static int __exit ux500_remove(struct platform_device *pdev)

{

	struct ux500_glue	*glue = platform_get_drvdata(pdev);



	platform_device_del(glue->musb);

	platform_device_put(glue->musb);

	clk_disable(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);



	otg_set_suspend(musb->xceiv, 1);

	clk_disable(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_enable(glue->clk);

	if (ret) {

		dev_err(dev, "failed to enable clock\n");

		return ret;

	}



	otg_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 = {

	.remove		= __exit_p(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");



static int __init ux500_init(void)

{

	return platform_driver_probe(&ux500_driver, ux500_probe);

}

subsys_initcall(ux500_init);



static void __exit ux500_exit(void)

{

	platform_driver_unregister(&ux500_driver);

}

module_exit(ux500_exit);