drivers/usb/host/ehci-msm.c - kernel/msm-4.9 - Gitiles

 /* ehci-msm.c - HSUSB Host Controller Driver Implementation
  *
  * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
  *
  * Partly derived from ehci-fsl.c and ehci-hcd.c
  * Copyright (c) 2000-2004 by David Brownell
  * Copyright (c) 2005 MontaVista Software
  *
  * All source code in this file is licensed under the following license except
  * where indicated.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License 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, you can find it at http://www.fsf.org
  */

 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/usb/otg.h>
 #include <linux/usb/msm_hsusb_hw.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
 #include <linux/acpi.h>

 #include "ehci.h"

 #define MSM_USB_BASE (hcd->regs)

 #define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"

 static const char hcd_name[] = "ehci-msm";
 static struct hc_driver __read_mostly msm_hc_driver;

 static int ehci_msm_reset(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	int retval;

 	ehci->caps = USB_CAPLENGTH;
 	hcd->has_tt = 1;

 	retval = ehci_setup(hcd);
 	if (retval)
 		return retval;

 	/* select ULPI phy and clear other status/control bits in PORTSC */
 	writel(PORTSC_PTS_ULPI, USB_PORTSC);
 	/* bursts of unspecified length. */
 	writel(0, USB_AHBBURST);
 	/* Use the AHB transactor, allow posted data writes */
 	writel(0x8, USB_AHBMODE);
 	/* Disable streaming mode and select host mode */
 	writel(0x13, USB_USBMODE);
 	/* Disable ULPI_TX_PKT_EN_CLR_FIX which is valid only for HSIC */
 	writel(readl(USB_GENCONFIG_2) & ~ULPI_TX_PKT_EN_CLR_FIX, USB_GENCONFIG_2);

 	return 0;
 }

 static int ehci_msm_probe(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd;
 	struct resource *res;
 	struct usb_phy *phy;
 	int ret;

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

 	hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd) {
 		dev_err(&pdev->dev, "Unable to create HCD\n");
 		return  -ENOMEM;
 	}

 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Unable to get IRQ resource\n");
 		goto put_hcd;
 	}
 	hcd->irq = ret;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "Unable to get memory resource\n");
 		ret = -ENODEV;
 		goto put_hcd;
 	}

 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 	hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
 	if (!hcd->regs) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = -ENOMEM;
 		goto put_hcd;
 	}

 	/*
 	 * If there is an OTG driver, let it take care of PHY initialization,
 	 * clock management, powering up VBUS, mapping of registers address
 	 * space and power management.
 	 */
 	if (pdev->dev.of_node)
 		phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
 	else
 		phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);

 	if (IS_ERR(phy)) {
 		if (PTR_ERR(phy) == -EPROBE_DEFER) {
 			dev_err(&pdev->dev, "unable to find transceiver\n");
 			ret = -EPROBE_DEFER;
 			goto put_hcd;
 		}
 		phy = NULL;
 	}

 	hcd->usb_phy = phy;
 	device_init_wakeup(&pdev->dev, 1);

 	if (phy && phy->otg) {
 		/*
 		 * MSM OTG driver takes care of adding the HCD and
 		 * placing hardware into low power mode via runtime PM.
 		 */
 		ret = otg_set_host(phy->otg, &hcd->self);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "unable to register with transceiver\n");
 			goto put_hcd;
 		}

 		pm_runtime_no_callbacks(&pdev->dev);
 		pm_runtime_enable(&pdev->dev);
 	} else {
 		ret = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
 		if (ret)
 			goto put_hcd;
 	}

 	return 0;

 put_hcd:
 	usb_put_hcd(hcd);

 	return ret;
 }

 static int ehci_msm_remove(struct platform_device *pdev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(pdev);

 	device_init_wakeup(&pdev->dev, 0);
 	pm_runtime_disable(&pdev->dev);
 	pm_runtime_set_suspended(&pdev->dev);

 	if (hcd->usb_phy && hcd->usb_phy->otg)
 		otg_set_host(hcd->usb_phy->otg, NULL);
 	else
 		usb_remove_hcd(hcd);

 	usb_put_hcd(hcd);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int ehci_msm_pm_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	bool do_wakeup = device_may_wakeup(dev);

 	dev_dbg(dev, "ehci-msm PM suspend\n");

 	return ehci_suspend(hcd, do_wakeup);
 }

 static int ehci_msm_pm_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);

 	dev_dbg(dev, "ehci-msm PM resume\n");
 	ehci_resume(hcd, false);

 	return 0;
 }
 #else
 #define ehci_msm_pm_suspend	NULL
 #define ehci_msm_pm_resume	NULL
 #endif

 static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
 	.suspend         = ehci_msm_pm_suspend,
 	.resume          = ehci_msm_pm_resume,
 };

 static const struct acpi_device_id msm_ehci_acpi_ids[] = {
 	{ "QCOM8040", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, msm_ehci_acpi_ids);

 static const struct of_device_id msm_ehci_dt_match[] = {
 	{ .compatible = "qcom,ehci-host", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);

 static struct platform_driver ehci_msm_driver = {
 	.probe	= ehci_msm_probe,
 	.remove	= ehci_msm_remove,
 	.shutdown = usb_hcd_platform_shutdown,
 	.driver = {
 		   .name = "msm_hsusb_host",
 		   .pm = &ehci_msm_dev_pm_ops,
 		   .of_match_table = msm_ehci_dt_match,
 		   .acpi_match_table = ACPI_PTR(msm_ehci_acpi_ids),
 	},
 };

 static const struct ehci_driver_overrides msm_overrides __initconst = {
 	.reset = ehci_msm_reset,
 };

 static int __init ehci_msm_init(void)
 {
 	if (usb_disabled())
 		return -ENODEV;

 	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
 	ehci_init_driver(&msm_hc_driver, &msm_overrides);
 	return platform_driver_register(&ehci_msm_driver);
 }
 module_init(ehci_msm_init);

 static void __exit ehci_msm_cleanup(void)
 {
 	platform_driver_unregister(&ehci_msm_driver);
 }
 module_exit(ehci_msm_cleanup);

 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_ALIAS("platform:msm-ehci");
 MODULE_LICENSE("GPL");
	/* ehci-msm.c - HSUSB Host Controller Driver Implementation
	*
	* Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
	*
	* Partly derived from ehci-fsl.c and ehci-hcd.c
	* Copyright (c) 2000-2004 by David Brownell
	* Copyright (c) 2005 MontaVista Software
	*
	* All source code in this file is licensed under the following license except
	* where indicated.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License 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, you can find it at http://www.fsf.org
	*/

	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/usb/otg.h>
	#include <linux/usb/msm_hsusb_hw.h>
	#include <linux/usb.h>
	#include <linux/usb/hcd.h>
	#include <linux/acpi.h>

	#include "ehci.h"

	#define MSM_USB_BASE (hcd->regs)

	#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"

	static const char hcd_name[] = "ehci-msm";
	static struct hc_driver __read_mostly msm_hc_driver;

	static int ehci_msm_reset(struct usb_hcd *hcd)
	{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	ehci->caps = USB_CAPLENGTH;
	hcd->has_tt = 1;

	retval = ehci_setup(hcd);
	if (retval)
	return retval;

	/* select ULPI phy and clear other status/control bits in PORTSC */
	writel(PORTSC_PTS_ULPI, USB_PORTSC);
	/* bursts of unspecified length. */
	writel(0, USB_AHBBURST);
	/* Use the AHB transactor, allow posted data writes */
	writel(0x8, USB_AHBMODE);
	/* Disable streaming mode and select host mode */
	writel(0x13, USB_USBMODE);
	/* Disable ULPI_TX_PKT_EN_CLR_FIX which is valid only for HSIC */
	writel(readl(USB_GENCONFIG_2) & ~ULPI_TX_PKT_EN_CLR_FIX, USB_GENCONFIG_2);

	return 0;
	}

	static int ehci_msm_probe(struct platform_device *pdev)
	{
	struct usb_hcd *hcd;
	struct resource *res;
	struct usb_phy *phy;
	int ret;

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

	hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
	dev_err(&pdev->dev, "Unable to create HCD\n");
	return -ENOMEM;
	}

	ret = platform_get_irq(pdev, 0);
	if (ret < 0) {
	dev_err(&pdev->dev, "Unable to get IRQ resource\n");
	goto put_hcd;
	}
	hcd->irq = ret;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(&pdev->dev, "Unable to get memory resource\n");
	ret = -ENODEV;
	goto put_hcd;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
	dev_err(&pdev->dev, "ioremap failed\n");
	ret = -ENOMEM;
	goto put_hcd;
	}

	/*
	* If there is an OTG driver, let it take care of PHY initialization,
	* clock management, powering up VBUS, mapping of registers address
	* space and power management.
	*/
	if (pdev->dev.of_node)
	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	else
	phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);

	if (IS_ERR(phy)) {
	if (PTR_ERR(phy) == -EPROBE_DEFER) {
	dev_err(&pdev->dev, "unable to find transceiver\n");
	ret = -EPROBE_DEFER;
	goto put_hcd;
	}
	phy = NULL;
	}

	hcd->usb_phy = phy;
	device_init_wakeup(&pdev->dev, 1);

	if (phy && phy->otg) {
	/*
	* MSM OTG driver takes care of adding the HCD and
	* placing hardware into low power mode via runtime PM.
	*/
	ret = otg_set_host(phy->otg, &hcd->self);
	if (ret < 0) {
	dev_err(&pdev->dev, "unable to register with transceiver\n");
	goto put_hcd;
	}

	pm_runtime_no_callbacks(&pdev->dev);
	pm_runtime_enable(&pdev->dev);
	} else {
	ret = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
	if (ret)
	goto put_hcd;
	}

	return 0;

	put_hcd:
	usb_put_hcd(hcd);

	return ret;
	}

	static int ehci_msm_remove(struct platform_device *pdev)
	{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	device_init_wakeup(&pdev->dev, 0);
	pm_runtime_disable(&pdev->dev);
	pm_runtime_set_suspended(&pdev->dev);

	if (hcd->usb_phy && hcd->usb_phy->otg)
	otg_set_host(hcd->usb_phy->otg, NULL);
	else
	usb_remove_hcd(hcd);

	usb_put_hcd(hcd);

	return 0;
	}

	#ifdef CONFIG_PM
	static int ehci_msm_pm_suspend(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	bool do_wakeup = device_may_wakeup(dev);

	dev_dbg(dev, "ehci-msm PM suspend\n");

	return ehci_suspend(hcd, do_wakeup);
	}

	static int ehci_msm_pm_resume(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);

	dev_dbg(dev, "ehci-msm PM resume\n");
	ehci_resume(hcd, false);

	return 0;
	}
	#else
	#define ehci_msm_pm_suspend NULL
	#define ehci_msm_pm_resume NULL
	#endif

	static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
	.suspend = ehci_msm_pm_suspend,
	.resume = ehci_msm_pm_resume,
	};

	static const struct acpi_device_id msm_ehci_acpi_ids[] = {
	{ "QCOM8040", 0 },
	{ }
	};
	MODULE_DEVICE_TABLE(acpi, msm_ehci_acpi_ids);

	static const struct of_device_id msm_ehci_dt_match[] = {
	{ .compatible = "qcom,ehci-host", },
	{}
	};
	MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);

	static struct platform_driver ehci_msm_driver = {
	.probe = ehci_msm_probe,
	.remove = ehci_msm_remove,
	.shutdown = usb_hcd_platform_shutdown,
	.driver = {
	.name = "msm_hsusb_host",
	.pm = &ehci_msm_dev_pm_ops,
	.of_match_table = msm_ehci_dt_match,
	.acpi_match_table = ACPI_PTR(msm_ehci_acpi_ids),
	},
	};

	static const struct ehci_driver_overrides msm_overrides __initconst = {
	.reset = ehci_msm_reset,
	};

	static int __init ehci_msm_init(void)
	{
	if (usb_disabled())
	return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	ehci_init_driver(&msm_hc_driver, &msm_overrides);
	return platform_driver_register(&ehci_msm_driver);
	}
	module_init(ehci_msm_init);

	static void __exit ehci_msm_cleanup(void)
	{
	platform_driver_unregister(&ehci_msm_driver);
	}
	module_exit(ehci_msm_cleanup);

	MODULE_DESCRIPTION(DRIVER_DESC);
	MODULE_ALIAS("platform:msm-ehci");
	MODULE_LICENSE("GPL");