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Commit 33f82f38 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti Committed by Greg Kroah-Hartman
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USB: gadget: Add USB controller driver for MSM SoC 



MSM SoC has chipidea USB controller. So use ci13xxx_udc core.
This driver depends on transceiver driver for clock control,
PHY initialization, VBUS detection.  Register for notify_event
callback to perform MSM specific quirks after controller is reset
and stopped.

Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f01ef574

drivers/usb/gadget/Kconfig

+21 −0
Original line number Diff line number Diff line
@@ -531,6 +531,27 @@ config USB_EG20T 
	default USB_GADGET

	select USB_GADGET_SELECTED



config USB_GADGET_CI13XXX_MSM

	boolean "MIPS USB CI13xxx for MSM"

	depends on ARCH_MSM

	select USB_GADGET_DUALSPEED

	select USB_MSM_OTG_72K

	help

	  MSM SoC has chipidea USB controller.  This driver uses

	  ci13xxx_udc core.

	  This driver depends on OTG driver for PHY initialization,

	  clock management, powering up VBUS, and power management.



	  Say "y" to link the driver statically, or "m" to build a

	  dynamically linked module called "ci13xxx_msm" and force all

	  gadget drivers to also be dynamically linked.



config USB_CI13XXX_MSM

	tristate

	depends on USB_GADGET_CI13XXX_MSM

	default USB_GADGET

	select USB_GADGET_SELECTED



#

# LAST -- dummy/emulated controller

#

drivers/usb/gadget/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ obj-$(CONFIG_USB_LANGWELL) += langwell_udc.o 
obj-$(CONFIG_USB_EG20T)		+= pch_udc.o

obj-$(CONFIG_USB_PXA_U2O)	+= mv_udc.o

mv_udc-y			:= mv_udc_core.o mv_udc_phy.o

obj-$(CONFIG_USB_CI13XXX_MSM)	+= ci13xxx_msm.o



#

# USB gadget drivers

drivers/usb/gadget/ci13xxx_msm.c

0 → 100644
+130 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 *

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/usb/msm_hsusb_hw.h>

#include <linux/usb/ulpi.h>



#include "ci13xxx_udc.c"



#define MSM_USB_BASE	(udc->regs)



static irqreturn_t msm_udc_irq(int irq, void *data)

{

	return udc_irq();

}



static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)

{

	struct device *dev = udc->gadget.dev.parent;

	int val;



	switch (event) {

	case CI13XXX_CONTROLLER_RESET_EVENT:

		dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");

		writel(0, USB_AHBBURST);

		writel(0, USB_AHBMODE);

		break;

	case CI13XXX_CONTROLLER_STOPPED_EVENT:

		dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");

		/*

		 * Put the transceiver in non-driving mode. Otherwise host

		 * may not detect soft-disconnection.

		 */

		val = otg_io_read(udc->transceiver, ULPI_FUNC_CTRL);

		val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;

		val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;

		otg_io_write(udc->transceiver, val, ULPI_FUNC_CTRL);

		break;

	default:

		dev_dbg(dev, "unknown ci13xxx_udc event\n");

		break;

	}

}



static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {

	.name			= "ci13xxx_msm",

	.flags			= CI13XXX_REGS_SHARED |

				  CI13XXX_REQUIRE_TRANSCEIVER |

				  CI13XXX_PULLUP_ON_VBUS |

				  CI13XXX_DISABLE_STREAMING,



	.notify_event		= ci13xxx_msm_notify_event,

};



static int ci13xxx_msm_probe(struct platform_device *pdev)

{

	struct resource *res;

	void __iomem *regs;

	int irq;

	int ret;



	dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(&pdev->dev, "failed to get platform resource mem\n");

		return -ENXIO;

	}



	regs = ioremap(res->start, resource_size(res));

	if (!regs) {

		dev_err(&pdev->dev, "ioremap failed\n");

		return -ENOMEM;

	}



	ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, regs);

	if (ret < 0) {

		dev_err(&pdev->dev, "udc_probe failed\n");

		goto iounmap;

	}



	irq = platform_get_irq(pdev, 0);

	if (irq < 0) {

		dev_err(&pdev->dev, "IRQ not found\n");

		ret = -ENXIO;

		goto udc_remove;

	}



	ret = request_irq(irq, msm_udc_irq, IRQF_SHARED, pdev->name, pdev);

	if (ret < 0) {

		dev_err(&pdev->dev, "request_irq failed\n");

		goto udc_remove;

	}



	return 0;



udc_remove:

	udc_remove();

iounmap:

	iounmap(regs);



	return ret;

}



static struct platform_driver ci13xxx_msm_driver = {

	.probe = ci13xxx_msm_probe,

	.driver = { .name = "msm_hsusb", },

};



static int __init ci13xxx_msm_init(void)

{

	return platform_driver_register(&ci13xxx_msm_driver);

}

module_init(ci13xxx_msm_init);

drivers/usb/gadget/gadget_chips.h

+8 −0
Original line number Diff line number Diff line
@@ -148,6 +148,12 @@ 
#define	gadget_is_pch(g)	0

#endif



#ifdef CONFIG_USB_GADGET_CI13XXX_MSM

#define gadget_is_ci13xxx_msm(g)	(!strcmp("ci13xxx_msm", (g)->name))

#else

#define gadget_is_ci13xxx_msm(g)	0

#endif



/**

 * usb_gadget_controller_number - support bcdDevice id convention

 * @gadget: the controller being driven
@@ -207,6 +213,8 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget) 
		return 0x26;

	else if (gadget_is_pch(gadget))

		return 0x27;

	else if (gadget_is_ci13xxx_msm(gadget))

		return 0x28;

	return -ENOENT;

}