drivers/usb/host/xhci-plat.c - kernel/msm-4.9 - Gitiles

 /*
  * xhci-plat.c - xHCI host controller driver platform Bus Glue.
  *
  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
  * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  *
  * A lot of code borrowed from the Linux xHCI driver.
  *
  * 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.
  */

 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>

 #include "xhci.h"
 #include "xhci-mvebu.h"

 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	/*
 	 * As of now platform drivers don't provide MSI support so we ensure
 	 * here that the generic code does not try to make a pci_dev from our
 	 * dev struct in order to setup MSI
 	 */
 	xhci->quirks |= XHCI_PLAT;
 }

 /* called during probe() after chip reset completes */
 static int xhci_plat_setup(struct usb_hcd *hcd)
 {
 	return xhci_gen_setup(hcd, xhci_plat_quirks);
 }

 static const struct hc_driver xhci_plat_xhci_driver = {
 	.description =		"xhci-hcd",
 	.product_desc =		"xHCI Host Controller",
 	.hcd_priv_size =	sizeof(struct xhci_hcd *),

 	/*
 	 * generic hardware linkage
 	 */
 	.irq =			xhci_irq,
 	.flags =		HCD_MEMORY | HCD_USB3 | HCD_SHARED,

 	/*
 	 * basic lifecycle operations
 	 */
 	.reset =		xhci_plat_setup,
 	.start =		xhci_run,
 	.stop =			xhci_stop,
 	.shutdown =		xhci_shutdown,

 	/*
 	 * managing i/o requests and associated device resources
 	 */
 	.urb_enqueue =		xhci_urb_enqueue,
 	.urb_dequeue =		xhci_urb_dequeue,
 	.alloc_dev =		xhci_alloc_dev,
 	.free_dev =		xhci_free_dev,
 	.alloc_streams =	xhci_alloc_streams,
 	.free_streams =		xhci_free_streams,
 	.add_endpoint =		xhci_add_endpoint,
 	.drop_endpoint =	xhci_drop_endpoint,
 	.endpoint_reset =	xhci_endpoint_reset,
 	.check_bandwidth =	xhci_check_bandwidth,
 	.reset_bandwidth =	xhci_reset_bandwidth,
 	.address_device =	xhci_address_device,
 	.enable_device =	xhci_enable_device,
 	.update_hub_device =	xhci_update_hub_device,
 	.reset_device =		xhci_discover_or_reset_device,

 	/*
 	 * scheduling support
 	 */
 	.get_frame_number =	xhci_get_frame,

 	/* Root hub support */
 	.hub_control =		xhci_hub_control,
 	.hub_status_data =	xhci_hub_status_data,
 	.bus_suspend =		xhci_bus_suspend,
 	.bus_resume =		xhci_bus_resume,
 };

 static int xhci_plat_probe(struct platform_device *pdev)
 {
 	const struct hc_driver	*driver;
 	struct xhci_hcd		*xhci;
 	struct resource         *res;
 	struct usb_hcd		*hcd;
 	struct clk              *clk;
 	int			ret;
 	int			irq;

 	if (usb_disabled())
 		return -ENODEV;

 	driver = &xhci_plat_xhci_driver;

 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return -ENODEV;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)
 		return -ENODEV;

 	if (of_device_is_compatible(pdev->dev.of_node,
 				    "marvell,armada-375-xhci") ||
 	    of_device_is_compatible(pdev->dev.of_node,
 				    "marvell,armada-380-xhci")) {
 		ret = xhci_mvebu_mbus_init_quirk(pdev);
 		if (ret)
 			return ret;
 	}

 	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
 	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 	if (ret)
 		return ret;
 	if (!pdev->dev.dma_mask)
 		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
 	else
 		dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));

 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 	if (!hcd)
 		return -ENOMEM;

 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);

 	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 				driver->description)) {
 		dev_dbg(&pdev->dev, "controller already in use\n");
 		ret = -EBUSY;
 		goto put_hcd;
 	}

 	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 	if (!hcd->regs) {
 		dev_dbg(&pdev->dev, "error mapping memory\n");
 		ret = -EFAULT;
 		goto release_mem_region;
 	}

 	/*
 	 * Not all platforms have a clk so it is not an error if the
 	 * clock does not exists.
 	 */
 	clk = devm_clk_get(&pdev->dev, NULL);
 	if (!IS_ERR(clk)) {
 		ret = clk_prepare_enable(clk);
 		if (ret)
 			goto unmap_registers;
 	}

 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (ret)
 		goto disable_clk;

 	device_wakeup_enable(hcd->self.controller);

 	/* USB 2.0 roothub is stored in the platform_device now. */
 	hcd = platform_get_drvdata(pdev);
 	xhci = hcd_to_xhci(hcd);
 	xhci->clk = clk;
 	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
 			dev_name(&pdev->dev), hcd);
 	if (!xhci->shared_hcd) {
 		ret = -ENOMEM;
 		goto dealloc_usb2_hcd;
 	}

 	/*
 	 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
 	 * is called by usb_add_hcd().
 	 */
 	*((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;

 	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
 		xhci->shared_hcd->can_do_streams = 1;

 	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
 	if (ret)
 		goto put_usb3_hcd;

 	return 0;

 put_usb3_hcd:
 	usb_put_hcd(xhci->shared_hcd);

 dealloc_usb2_hcd:
 	usb_remove_hcd(hcd);

 disable_clk:
 	if (!IS_ERR(clk))
 		clk_disable_unprepare(clk);

 unmap_registers:
 	iounmap(hcd->regs);

 release_mem_region:
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

 put_hcd:
 	usb_put_hcd(hcd);

 	return ret;
 }

 static int xhci_plat_remove(struct platform_device *dev)
 {
 	struct usb_hcd	*hcd = platform_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	struct clk *clk = xhci->clk;

 	usb_remove_hcd(xhci->shared_hcd);
 	usb_put_hcd(xhci->shared_hcd);

 	usb_remove_hcd(hcd);
 	if (!IS_ERR(clk))
 		clk_disable_unprepare(clk);
 	iounmap(hcd->regs);
 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);
 	kfree(xhci);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int xhci_plat_suspend(struct device *dev)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);

 	return xhci_suspend(xhci);
 }

 static int xhci_plat_resume(struct device *dev)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);

 	return xhci_resume(xhci, 0);
 }

 static const struct dev_pm_ops xhci_plat_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
 };
 #define DEV_PM_OPS	(&xhci_plat_pm_ops)
 #else
 #define DEV_PM_OPS	NULL
 #endif /* CONFIG_PM */

 #ifdef CONFIG_OF
 static const struct of_device_id usb_xhci_of_match[] = {
 	{ .compatible = "generic-xhci" },
 	{ .compatible = "xhci-platform" },
 	{ .compatible = "marvell,armada-375-xhci"},
 	{ .compatible = "marvell,armada-380-xhci"},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
 #endif

 static struct platform_driver usb_xhci_driver = {
 	.probe	= xhci_plat_probe,
 	.remove	= xhci_plat_remove,
 	.driver	= {
 		.name = "xhci-hcd",
 		.pm = DEV_PM_OPS,
 		.of_match_table = of_match_ptr(usb_xhci_of_match),
 	},
 };
 MODULE_ALIAS("platform:xhci-hcd");

 int xhci_register_plat(void)
 {
 	return platform_driver_register(&usb_xhci_driver);
 }

 void xhci_unregister_plat(void)
 {
 	platform_driver_unregister(&usb_xhci_driver);
 }
	/*
	* xhci-plat.c - xHCI host controller driver platform Bus Glue.
	*
	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
	* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	*
	* A lot of code borrowed from the Linux xHCI driver.
	*
	* 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.
	*/

	#include <linux/clk.h>
	#include <linux/dma-mapping.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>

	#include "xhci.h"
	#include "xhci-mvebu.h"

	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
	{
	/*
	* As of now platform drivers don't provide MSI support so we ensure
	* here that the generic code does not try to make a pci_dev from our
	* dev struct in order to setup MSI
	*/
	xhci->quirks \|= XHCI_PLAT;
	}

	/* called during probe() after chip reset completes */
	static int xhci_plat_setup(struct usb_hcd *hcd)
	{
	return xhci_gen_setup(hcd, xhci_plat_quirks);
	}

	static const struct hc_driver xhci_plat_xhci_driver = {
	.description = "xhci-hcd",
	.product_desc = "xHCI Host Controller",
	.hcd_priv_size = sizeof(struct xhci_hcd *),

	/*
	* generic hardware linkage
	*/
	.irq = xhci_irq,
	.flags = HCD_MEMORY \| HCD_USB3 \| HCD_SHARED,

	/*
	* basic lifecycle operations
	*/
	.reset = xhci_plat_setup,
	.start = xhci_run,
	.stop = xhci_stop,
	.shutdown = xhci_shutdown,

	/*
	* managing i/o requests and associated device resources
	*/
	.urb_enqueue = xhci_urb_enqueue,
	.urb_dequeue = xhci_urb_dequeue,
	.alloc_dev = xhci_alloc_dev,
	.free_dev = xhci_free_dev,
	.alloc_streams = xhci_alloc_streams,
	.free_streams = xhci_free_streams,
	.add_endpoint = xhci_add_endpoint,
	.drop_endpoint = xhci_drop_endpoint,
	.endpoint_reset = xhci_endpoint_reset,
	.check_bandwidth = xhci_check_bandwidth,
	.reset_bandwidth = xhci_reset_bandwidth,
	.address_device = xhci_address_device,
	.enable_device = xhci_enable_device,
	.update_hub_device = xhci_update_hub_device,
	.reset_device = xhci_discover_or_reset_device,

	/*
	* scheduling support
	*/
	.get_frame_number = xhci_get_frame,

	/* Root hub support */
	.hub_control = xhci_hub_control,
	.hub_status_data = xhci_hub_status_data,
	.bus_suspend = xhci_bus_suspend,
	.bus_resume = xhci_bus_resume,
	};

	static int xhci_plat_probe(struct platform_device *pdev)
	{
	const struct hc_driver *driver;
	struct xhci_hcd *xhci;
	struct resource *res;
	struct usb_hcd *hcd;
	struct clk *clk;
	int ret;
	int irq;

	if (usb_disabled())
	return -ENODEV;

	driver = &xhci_plat_xhci_driver;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
	return -ENODEV;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
	return -ENODEV;

	if (of_device_is_compatible(pdev->dev.of_node,
	"marvell,armada-375-xhci") \|\|
	of_device_is_compatible(pdev->dev.of_node,
	"marvell,armada-380-xhci")) {
	ret = xhci_mvebu_mbus_init_quirk(pdev);
	if (ret)
	return ret;
	}

	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
	return ret;
	if (!pdev->dev.dma_mask)
	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	else
	dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd)
	return -ENOMEM;

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	driver->description)) {
	dev_dbg(&pdev->dev, "controller already in use\n");
	ret = -EBUSY;
	goto put_hcd;
	}

	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
	dev_dbg(&pdev->dev, "error mapping memory\n");
	ret = -EFAULT;
	goto release_mem_region;
	}

	/*
	* Not all platforms have a clk so it is not an error if the
	* clock does not exists.
	*/
	clk = devm_clk_get(&pdev->dev, NULL);
	if (!IS_ERR(clk)) {
	ret = clk_prepare_enable(clk);
	if (ret)
	goto unmap_registers;
	}

	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (ret)
	goto disable_clk;

	device_wakeup_enable(hcd->self.controller);

	/* USB 2.0 roothub is stored in the platform_device now. */
	hcd = platform_get_drvdata(pdev);
	xhci = hcd_to_xhci(hcd);
	xhci->clk = clk;
	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	dev_name(&pdev->dev), hcd);
	if (!xhci->shared_hcd) {
	ret = -ENOMEM;
	goto dealloc_usb2_hcd;
	}

	/*
	* Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
	* is called by usb_add_hcd().
	*/
	((struct xhci_hcd *) xhci->shared_hcd->hcd_priv) = xhci;

	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
	xhci->shared_hcd->can_do_streams = 1;

	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	if (ret)
	goto put_usb3_hcd;

	return 0;

	put_usb3_hcd:
	usb_put_hcd(xhci->shared_hcd);

	dealloc_usb2_hcd:
	usb_remove_hcd(hcd);

	disable_clk:
	if (!IS_ERR(clk))
	clk_disable_unprepare(clk);

	unmap_registers:
	iounmap(hcd->regs);

	release_mem_region:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

	put_hcd:
	usb_put_hcd(hcd);

	return ret;
	}

	static int xhci_plat_remove(struct platform_device *dev)
	{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	struct clk *clk = xhci->clk;

	usb_remove_hcd(xhci->shared_hcd);
	usb_put_hcd(xhci->shared_hcd);

	usb_remove_hcd(hcd);
	if (!IS_ERR(clk))
	clk_disable_unprepare(clk);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	kfree(xhci);

	return 0;
	}

	#ifdef CONFIG_PM
	static int xhci_plat_suspend(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct xhci_hcd *xhci = hcd_to_xhci(hcd);

	return xhci_suspend(xhci);
	}

	static int xhci_plat_resume(struct device *dev)
	{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct xhci_hcd *xhci = hcd_to_xhci(hcd);

	return xhci_resume(xhci, 0);
	}

	static const struct dev_pm_ops xhci_plat_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	};
	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	#else
	#define DEV_PM_OPS NULL
	#endif /* CONFIG_PM */

	#ifdef CONFIG_OF
	static const struct of_device_id usb_xhci_of_match[] = {
	{ .compatible = "generic-xhci" },
	{ .compatible = "xhci-platform" },
	{ .compatible = "marvell,armada-375-xhci"},
	{ .compatible = "marvell,armada-380-xhci"},
	{ },
	};
	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	#endif

	static struct platform_driver usb_xhci_driver = {
	.probe = xhci_plat_probe,
	.remove = xhci_plat_remove,
	.driver = {
	.name = "xhci-hcd",
	.pm = DEV_PM_OPS,
	.of_match_table = of_match_ptr(usb_xhci_of_match),
	},
	};
	MODULE_ALIAS("platform:xhci-hcd");

	int xhci_register_plat(void)
	{
	return platform_driver_register(&usb_xhci_driver);
	}

	void xhci_unregister_plat(void)
	{
	platform_driver_unregister(&usb_xhci_driver);
	}