drivers/usb/gadget/ci13xxx_msm.c - kernel/msm - Gitiles

 /* Copyright (c) 2010-2012, 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.
  *
  */

 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/usb/msm_hsusb_hw.h>
 #include <linux/usb/ulpi.h>
 #include <linux/gpio.h>

 #include "ci13xxx_udc.c"

 #define MSM_USB_BASE	(udc->regs)

 struct ci13xxx_udc_context {
 	int irq;
 	void __iomem *regs;
 	int wake_gpio;
 	int wake_irq;
 	bool wake_irq_state;
 };

 static struct ci13xxx_udc_context _udc_ctxt;

 static irqreturn_t msm_udc_irq(int irq, void *data)
 {
 	return udc_irq();
 }

 static void ci13xxx_msm_suspend(void)
 {
 	struct device *dev = _udc->gadget.dev.parent;
 	dev_dbg(dev, "ci13xxx_msm_suspend\n");

 	if (_udc_ctxt.wake_irq && !_udc_ctxt.wake_irq_state) {
 		enable_irq_wake(_udc_ctxt.wake_irq);
 		enable_irq(_udc_ctxt.wake_irq);
 		_udc_ctxt.wake_irq_state = true;
 	}
 }

 static void ci13xxx_msm_resume(void)
 {
 	struct device *dev = _udc->gadget.dev.parent;
 	dev_dbg(dev, "ci13xxx_msm_resume\n");

 	if (_udc_ctxt.wake_irq && _udc_ctxt.wake_irq_state) {
 		disable_irq_wake(_udc_ctxt.wake_irq);
 		disable_irq_nosync(_udc_ctxt.wake_irq);
 		_udc_ctxt.wake_irq_state = false;
 	}
 }

 static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
 {
 	struct device *dev = udc->gadget.dev.parent;

 	switch (event) {
 	case CI13XXX_CONTROLLER_RESET_EVENT:
 		dev_info(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
 		writel(0, USB_AHBBURST);
 		writel_relaxed(0x08, USB_AHBMODE);
 		break;
 	case CI13XXX_CONTROLLER_DISCONNECT_EVENT:
 		dev_info(dev, "CI13XXX_CONTROLLER_DISCONNECT_EVENT received\n");
 		ci13xxx_msm_resume();
 		break;
 	case CI13XXX_CONTROLLER_SUSPEND_EVENT:
 		dev_info(dev, "CI13XXX_CONTROLLER_SUSPEND_EVENT received\n");
 		ci13xxx_msm_suspend();
 		break;
 	case CI13XXX_CONTROLLER_RESUME_EVENT:
 		dev_info(dev, "CI13XXX_CONTROLLER_RESUME_EVENT received\n");
 		ci13xxx_msm_resume();
 		break;

 	default:
 		dev_dbg(dev, "unknown ci13xxx_udc event\n");
 		break;
 	}
 }

 static irqreturn_t ci13xxx_msm_resume_irq(int irq, void *data)
 {
 	struct ci13xxx *udc = _udc;

 	if (udc->transceiver && udc->vbus_active && udc->suspended)
 		usb_phy_set_suspend(udc->transceiver, 0);
 	else if (!udc->suspended)
 		ci13xxx_msm_resume();

 	return IRQ_HANDLED;
 }

 static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
 	.name			= "ci13xxx_msm",
 	.flags			= CI13XXX_REGS_SHARED |
 				  CI13XXX_REQUIRE_TRANSCEIVER |
 				  CI13XXX_PULLUP_ON_VBUS |
 				  CI13XXX_ZERO_ITC |
 				  CI13XXX_DISABLE_STREAMING |
 				  CI13XXX_IS_OTG,

 	.notify_event		= ci13xxx_msm_notify_event,
 };

 static int ci13xxx_msm_install_wake_gpio(struct platform_device *pdev,
 				struct resource *res)
 {
 	int wake_irq;
 	int ret;

 	dev_dbg(&pdev->dev, "ci13xxx_msm_install_wake_gpio\n");

 	_udc_ctxt.wake_gpio = res->start;
 	gpio_request(_udc_ctxt.wake_gpio, "USB_RESUME");
 	gpio_direction_input(_udc_ctxt.wake_gpio);
 	wake_irq = gpio_to_irq(_udc_ctxt.wake_gpio);
 	if (wake_irq < 0) {
 		dev_err(&pdev->dev, "could not register USB_RESUME GPIO.\n");
 		return -ENXIO;
 	}

 	dev_dbg(&pdev->dev, "_udc_ctxt.gpio_irq = %d and irq = %d\n",
 			_udc_ctxt.wake_gpio, wake_irq);
 	ret = request_irq(wake_irq, ci13xxx_msm_resume_irq,
 		IRQF_TRIGGER_RISING | IRQF_ONESHOT, "usb resume", NULL);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "could not register USB_RESUME IRQ.\n");
 		goto gpio_free;
 	}
 	disable_irq(wake_irq);
 	_udc_ctxt.wake_irq = wake_irq;

 	return 0;

 gpio_free:
 	gpio_free(_udc_ctxt.wake_gpio);
 	_udc_ctxt.wake_gpio = 0;
 	return ret;
 }

 static void ci13xxx_msm_uninstall_wake_gpio(struct platform_device *pdev)
 {
 	dev_dbg(&pdev->dev, "ci13xxx_msm_uninstall_wake_gpio\n");

 	if (_udc_ctxt.wake_gpio) {
 		gpio_free(_udc_ctxt.wake_gpio);
 		_udc_ctxt.wake_gpio = 0;
 	}
 }

 static int ci13xxx_msm_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	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;
 	}

 	_udc_ctxt.regs = ioremap(res->start, resource_size(res));
 	if (!_udc_ctxt.regs) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 		return -ENOMEM;
 	}

 	ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, _udc_ctxt.regs);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "udc_probe failed\n");
 		goto iounmap;
 	}

 	_udc_ctxt.irq = platform_get_irq(pdev, 0);
 	if (_udc_ctxt.irq < 0) {
 		dev_err(&pdev->dev, "IRQ not found\n");
 		ret = -ENXIO;
 		goto udc_remove;
 	}

 	res = platform_get_resource_byname(pdev, IORESOURCE_IO, "USB_RESUME");
 	if (res) {
 		ret = ci13xxx_msm_install_wake_gpio(pdev, res);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "gpio irq install failed\n");
 			goto udc_remove;
 		}
 	}

 	ret = request_irq(_udc_ctxt.irq, msm_udc_irq, IRQF_SHARED, pdev->name,
 					  pdev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "request_irq failed\n");
 		goto gpio_uninstall;
 	}

 	pm_runtime_no_callbacks(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);

 	return 0;

 gpio_uninstall:
 	ci13xxx_msm_uninstall_wake_gpio(pdev);
 udc_remove:
 	udc_remove();
 iounmap:
 	iounmap(_udc_ctxt.regs);

 	return ret;
 }

 int ci13xxx_msm_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 	free_irq(_udc_ctxt.irq, pdev);
 	ci13xxx_msm_uninstall_wake_gpio(pdev);
 	udc_remove();
 	iounmap(_udc_ctxt.regs);
 	return 0;
 }

 void msm_hw_bam_disable(bool bam_disable)
 {
 	u32 val;
 	struct ci13xxx *udc = _udc;

 	if (bam_disable)
 		val = readl_relaxed(USB_GENCONFIG) | GENCONFIG_BAM_DISABLE;
 	else
 		val = readl_relaxed(USB_GENCONFIG) & ~GENCONFIG_BAM_DISABLE;

 	writel_relaxed(val, USB_GENCONFIG);
 }

 static struct platform_driver ci13xxx_msm_driver = {
 	.probe = ci13xxx_msm_probe,
 	.driver = { .name = "msm_hsusb", },
 	.remove = ci13xxx_msm_remove,
 };
 MODULE_ALIAS("platform:msm_hsusb");

 static int __init ci13xxx_msm_init(void)
 {
 	return platform_driver_register(&ci13xxx_msm_driver);
 }
 module_init(ci13xxx_msm_init);

 static void __exit ci13xxx_msm_exit(void)
 {
 	platform_driver_unregister(&ci13xxx_msm_driver);
 }
 module_exit(ci13xxx_msm_exit);

 MODULE_LICENSE("GPL v2");
	/* Copyright (c) 2010-2012, 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.
	*
	*/

	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/usb/msm_hsusb_hw.h>
	#include <linux/usb/ulpi.h>
	#include <linux/gpio.h>

	#include "ci13xxx_udc.c"

	#define MSM_USB_BASE (udc->regs)

	struct ci13xxx_udc_context {
	int irq;
	void __iomem *regs;
	int wake_gpio;
	int wake_irq;
	bool wake_irq_state;
	};

	static struct ci13xxx_udc_context _udc_ctxt;

	static irqreturn_t msm_udc_irq(int irq, void *data)
	{
	return udc_irq();
	}

	static void ci13xxx_msm_suspend(void)
	{
	struct device *dev = _udc->gadget.dev.parent;
	dev_dbg(dev, "ci13xxx_msm_suspend\n");

	if (_udc_ctxt.wake_irq && !_udc_ctxt.wake_irq_state) {
	enable_irq_wake(_udc_ctxt.wake_irq);
	enable_irq(_udc_ctxt.wake_irq);
	_udc_ctxt.wake_irq_state = true;
	}
	}

	static void ci13xxx_msm_resume(void)
	{
	struct device *dev = _udc->gadget.dev.parent;
	dev_dbg(dev, "ci13xxx_msm_resume\n");

	if (_udc_ctxt.wake_irq && _udc_ctxt.wake_irq_state) {
	disable_irq_wake(_udc_ctxt.wake_irq);
	disable_irq_nosync(_udc_ctxt.wake_irq);
	_udc_ctxt.wake_irq_state = false;
	}
	}

	static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
	{
	struct device *dev = udc->gadget.dev.parent;

	switch (event) {
	case CI13XXX_CONTROLLER_RESET_EVENT:
	dev_info(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
	writel(0, USB_AHBBURST);
	writel_relaxed(0x08, USB_AHBMODE);
	break;
	case CI13XXX_CONTROLLER_DISCONNECT_EVENT:
	dev_info(dev, "CI13XXX_CONTROLLER_DISCONNECT_EVENT received\n");
	ci13xxx_msm_resume();
	break;
	case CI13XXX_CONTROLLER_SUSPEND_EVENT:
	dev_info(dev, "CI13XXX_CONTROLLER_SUSPEND_EVENT received\n");
	ci13xxx_msm_suspend();
	break;
	case CI13XXX_CONTROLLER_RESUME_EVENT:
	dev_info(dev, "CI13XXX_CONTROLLER_RESUME_EVENT received\n");
	ci13xxx_msm_resume();
	break;

	default:
	dev_dbg(dev, "unknown ci13xxx_udc event\n");
	break;
	}
	}

	static irqreturn_t ci13xxx_msm_resume_irq(int irq, void *data)
	{
	struct ci13xxx *udc = _udc;

	if (udc->transceiver && udc->vbus_active && udc->suspended)
	usb_phy_set_suspend(udc->transceiver, 0);
	else if (!udc->suspended)
	ci13xxx_msm_resume();

	return IRQ_HANDLED;
	}

	static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
	.name = "ci13xxx_msm",
	.flags = CI13XXX_REGS_SHARED \|
	CI13XXX_REQUIRE_TRANSCEIVER \|
	CI13XXX_PULLUP_ON_VBUS \|
	CI13XXX_ZERO_ITC \|
	CI13XXX_DISABLE_STREAMING \|
	CI13XXX_IS_OTG,

	.notify_event = ci13xxx_msm_notify_event,
	};

	static int ci13xxx_msm_install_wake_gpio(struct platform_device *pdev,
	struct resource *res)
	{
	int wake_irq;
	int ret;

	dev_dbg(&pdev->dev, "ci13xxx_msm_install_wake_gpio\n");

	_udc_ctxt.wake_gpio = res->start;
	gpio_request(_udc_ctxt.wake_gpio, "USB_RESUME");
	gpio_direction_input(_udc_ctxt.wake_gpio);
	wake_irq = gpio_to_irq(_udc_ctxt.wake_gpio);
	if (wake_irq < 0) {
	dev_err(&pdev->dev, "could not register USB_RESUME GPIO.\n");
	return -ENXIO;
	}

	dev_dbg(&pdev->dev, "_udc_ctxt.gpio_irq = %d and irq = %d\n",
	_udc_ctxt.wake_gpio, wake_irq);
	ret = request_irq(wake_irq, ci13xxx_msm_resume_irq,
	IRQF_TRIGGER_RISING \| IRQF_ONESHOT, "usb resume", NULL);
	if (ret < 0) {
	dev_err(&pdev->dev, "could not register USB_RESUME IRQ.\n");
	goto gpio_free;
	}
	disable_irq(wake_irq);
	_udc_ctxt.wake_irq = wake_irq;

	return 0;

	gpio_free:
	gpio_free(_udc_ctxt.wake_gpio);
	_udc_ctxt.wake_gpio = 0;
	return ret;
	}

	static void ci13xxx_msm_uninstall_wake_gpio(struct platform_device *pdev)
	{
	dev_dbg(&pdev->dev, "ci13xxx_msm_uninstall_wake_gpio\n");

	if (_udc_ctxt.wake_gpio) {
	gpio_free(_udc_ctxt.wake_gpio);
	_udc_ctxt.wake_gpio = 0;
	}
	}

	static int ci13xxx_msm_probe(struct platform_device *pdev)
	{
	struct resource *res;
	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;
	}

	_udc_ctxt.regs = ioremap(res->start, resource_size(res));
	if (!_udc_ctxt.regs) {
	dev_err(&pdev->dev, "ioremap failed\n");
	return -ENOMEM;
	}

	ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, _udc_ctxt.regs);
	if (ret < 0) {
	dev_err(&pdev->dev, "udc_probe failed\n");
	goto iounmap;
	}

	_udc_ctxt.irq = platform_get_irq(pdev, 0);
	if (_udc_ctxt.irq < 0) {
	dev_err(&pdev->dev, "IRQ not found\n");
	ret = -ENXIO;
	goto udc_remove;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_IO, "USB_RESUME");
	if (res) {
	ret = ci13xxx_msm_install_wake_gpio(pdev, res);
	if (ret < 0) {
	dev_err(&pdev->dev, "gpio irq install failed\n");
	goto udc_remove;
	}
	}

	ret = request_irq(_udc_ctxt.irq, msm_udc_irq, IRQF_SHARED, pdev->name,
	pdev);
	if (ret < 0) {
	dev_err(&pdev->dev, "request_irq failed\n");
	goto gpio_uninstall;
	}

	pm_runtime_no_callbacks(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	return 0;

	gpio_uninstall:
	ci13xxx_msm_uninstall_wake_gpio(pdev);
	udc_remove:
	udc_remove();
	iounmap:
	iounmap(_udc_ctxt.regs);

	return ret;
	}

	int ci13xxx_msm_remove(struct platform_device *pdev)
	{
	pm_runtime_disable(&pdev->dev);
	free_irq(_udc_ctxt.irq, pdev);
	ci13xxx_msm_uninstall_wake_gpio(pdev);
	udc_remove();
	iounmap(_udc_ctxt.regs);
	return 0;
	}

	void msm_hw_bam_disable(bool bam_disable)
	{
	u32 val;
	struct ci13xxx *udc = _udc;

	if (bam_disable)
	val = readl_relaxed(USB_GENCONFIG) \| GENCONFIG_BAM_DISABLE;
	else
	val = readl_relaxed(USB_GENCONFIG) & ~GENCONFIG_BAM_DISABLE;

	writel_relaxed(val, USB_GENCONFIG);
	}

	static struct platform_driver ci13xxx_msm_driver = {
	.probe = ci13xxx_msm_probe,
	.driver = { .name = "msm_hsusb", },
	.remove = ci13xxx_msm_remove,
	};
	MODULE_ALIAS("platform:msm_hsusb");

	static int __init ci13xxx_msm_init(void)
	{
	return platform_driver_register(&ci13xxx_msm_driver);
	}
	module_init(ci13xxx_msm_init);

	static void __exit ci13xxx_msm_exit(void)
	{
	platform_driver_unregister(&ci13xxx_msm_driver);
	}
	module_exit(ci13xxx_msm_exit);

	MODULE_LICENSE("GPL v2");