Release 4.16 drivers/usb/host/xhci-plat.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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.
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/acpi.h>

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


static struct hc_driver __read_mostly xhci_plat_hc_driver;

static int xhci_plat_setup(struct usb_hcd *hcd);
static int xhci_plat_start(struct usb_hcd *hcd);


static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
	.extra_priv_size = sizeof(struct xhci_plat_priv),
	.reset = xhci_plat_setup,
	.start = xhci_plat_start,
};



static void xhci_priv_plat_start(struct usb_hcd *hcd)
{
	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

	if (priv->plat_start)
		priv->plat_start(hcd);
}

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7
20.59%
1
33.33%
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34
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3
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static int xhci_priv_init_quirk(struct usb_hcd *hcd)
{
	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

	if (!priv->init_quirk)
		return 0;

	return priv->init_quirk(hcd);
}

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2
100.00%



static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
{
	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

	if (!priv->resume_quirk)
		return 0;

	return priv->resume_quirk(hcd);
}

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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;
}

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1
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1
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23
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/* called during probe() after chip reset completes */


static int xhci_plat_setup(struct usb_hcd *hcd)
{
	int ret;


	ret = xhci_priv_init_quirk(hcd);
	if (ret)
		return ret;

	return xhci_gen_setup(hcd, xhci_plat_quirks);
}

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3
8.33%
1
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36
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5
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static int xhci_plat_start(struct usb_hcd *hcd)
{
	xhci_priv_plat_start(hcd);
	return xhci_run(hcd);
}

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#ifdef CONFIG_OF

static const struct xhci_plat_priv xhci_plat_marvell_armada = {
	.init_quirk = xhci_mvebu_mbus_init_quirk,
};


static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
	.init_quirk = xhci_rcar_init_quirk,
	.plat_start = xhci_rcar_start,
	.resume_quirk = xhci_rcar_resume_quirk,
};


static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
	.init_quirk = xhci_rcar_init_quirk,
	.plat_start = xhci_rcar_start,
	.resume_quirk = xhci_rcar_resume_quirk,
};


static const struct of_device_id usb_xhci_of_match[] = {
	{
		.compatible = "generic-xhci",
        }, {
		.compatible = "xhci-platform",
        }, {
		.compatible = "marvell,armada-375-xhci",
		.data = &xhci_plat_marvell_armada,
        }, {
		.compatible = "marvell,armada-380-xhci",
		.data = &xhci_plat_marvell_armada,
        }, {
		.compatible = "renesas,xhci-r8a7790",
		.data = &xhci_plat_renesas_rcar_gen2,
        }, {
		.compatible = "renesas,xhci-r8a7791",
		.data = &xhci_plat_renesas_rcar_gen2,
        }, {
		.compatible = "renesas,xhci-r8a7793",
		.data = &xhci_plat_renesas_rcar_gen2,
        }, {
		.compatible = "renesas,xhci-r8a7795",
		.data = &xhci_plat_renesas_rcar_gen3,
        }, {
		.compatible = "renesas,xhci-r8a7796",
		.data = &xhci_plat_renesas_rcar_gen3,
        }, {
		.compatible = "renesas,rcar-gen2-xhci",
		.data = &xhci_plat_renesas_rcar_gen2,
        }, {
		.compatible = "renesas,rcar-gen3-xhci",
		.data = &xhci_plat_renesas_rcar_gen3,
        },
	{},
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif



static int xhci_plat_probe(struct platform_device *pdev)
{
	const struct xhci_plat_priv *priv_match;
	const struct hc_driver	*driver;
	struct device		*sysdev;
	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_hc_driver;

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

	/*
         * sysdev must point to a device that is known to the system firmware
         * or PCI hardware. We handle these three cases here:
         * 1. xhci_plat comes from firmware
         * 2. xhci_plat is child of a device from firmware (dwc3-plat)
         * 3. xhci_plat is grandchild of a pci device (dwc3-pci)
         */
	for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) {
		if (is_of_node(sysdev->fwnode) ||
			is_acpi_device_node(sysdev->fwnode))
			break;
#ifdef CONFIG_PCI
		else if (sysdev->bus == &pci_bus_type)
			break;
#endif
	}

	if (!sysdev)
		sysdev = &pdev->dev;

	/* Try to set 64-bit DMA first */
	if (WARN_ON(!sysdev->dma_mask))
		/* Platform did not initialize dma_mask */
		ret = dma_coerce_mask_and_coherent(sysdev,
						   DMA_BIT_MASK(64));
	else
		ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64));

	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	if (ret) {
		ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(32));
		if (ret)
			return ret;
	}

	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);
	pm_runtime_get_noresume(&pdev->dev);

	hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
			       dev_name(&pdev->dev), NULL);
	if (!hcd) {
		ret = -ENOMEM;
		goto disable_runtime;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto put_hcd;
	}

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

	/*
         * 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 put_hcd;
	} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
		ret = -EPROBE_DEFER;
		goto put_hcd;
	}

	xhci = hcd_to_xhci(hcd);
	priv_match = of_device_get_match_data(&pdev->dev);
	if (priv_match) {
		struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

		/* Just copy data for now */
		if (priv_match)
			*priv = *priv_match;
	}

	device_wakeup_enable(hcd->self.controller);

	xhci->clk = clk;
	xhci->main_hcd = hcd;
	xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
			dev_name(&pdev->dev), hcd);
	if (!xhci->shared_hcd) {
		ret = -ENOMEM;
		goto disable_clk;
	}

	if (device_property_read_bool(sysdev, "usb2-lpm-disable"))
		xhci->quirks |= XHCI_HW_LPM_DISABLE;

	if (device_property_read_bool(sysdev, "usb3-lpm-capable"))
		xhci->quirks |= XHCI_LPM_SUPPORT;

	if (device_property_read_bool(&pdev->dev, "quirk-broken-port-ped"))
		xhci->quirks |= XHCI_BROKEN_PORT_PED;

	/* imod_interval is the interrupt moderation value in nanoseconds. */
	xhci->imod_interval = 40000;
	device_property_read_u32(sysdev, "imod-interval-ns",
				 &xhci->imod_interval);

	hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
	if (IS_ERR(hcd->usb_phy)) {
		ret = PTR_ERR(hcd->usb_phy);
		if (ret == -EPROBE_DEFER)
			goto put_usb3_hcd;
		hcd->usb_phy = NULL;
	} else {
		ret = usb_phy_init(hcd->usb_phy);
		if (ret)
			goto put_usb3_hcd;
	}

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

	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 dealloc_usb2_hcd;

	device_enable_async_suspend(&pdev->dev);
	pm_runtime_put_noidle(&pdev->dev);

	/*
         * Prevent runtime pm from being on as default, users should enable
         * runtime pm using power/control in sysfs.
         */
	pm_runtime_forbid(&pdev->dev);

	return 0;


dealloc_usb2_hcd:
	usb_remove_hcd(hcd);

disable_usb_phy:
	usb_phy_shutdown(hcd->usb_phy);

put_usb3_hcd:
	usb_put_hcd(xhci->shared_hcd);

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

put_hcd:
	usb_put_hcd(hcd);

disable_runtime:
	pm_runtime_put_noidle(&pdev->dev);
	pm_runtime_disable(&pdev->dev);

	return ret;
}

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67
8.42%
1
3.70%
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66
8.29%
2
7.41%
Arnd Bergmann
54
6.78%
1
3.70%
Adam Wallis
52
6.53%
2
7.41%
Duc Dang
36
4.52%
1
3.70%
Yoshihiro Shimoda
34
4.27%
1
3.70%
Roger Quadros
33
4.15%
2
7.41%
Varka Bhadram
23
2.89%
1
3.70%
Thomas Petazzoni
22
2.76%
2
7.41%
Xenia Ragiadakou
20
2.51%
1
3.70%
William Wu
19
2.39%
1
3.70%
Felipe Balbi
18
2.26%
1
3.70%
Thang Q. Nguyen
15
1.88%
1
3.70%
Himangi Saraogi
14
1.76%
1
3.70%
Pratyush Anand
13
1.63%
1
3.70%
Andrew Bresticker
9
1.13%
2
7.41%
Peter Chen
9
1.13%
1
3.70%
Geert Uytterhoeven
6
0.75%
1
3.70%
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4
0.50%
1
3.70%
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796
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27
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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;

	xhci->xhc_state |= XHCI_STATE_REMOVING;

	usb_remove_hcd(xhci->shared_hcd);
	usb_phy_shutdown(hcd->usb_phy);

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

	if (!IS_ERR(clk))
		clk_disable_unprepare(clk);
	usb_put_hcd(hcd);

	pm_runtime_set_suspended(&dev->dev);
	pm_runtime_disable(&dev->dev);

	return 0;
}

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22
20.18%
1
16.67%
Baolin Wang
16
14.68%
1
16.67%
Maxime Ripard
7
6.42%
1
16.67%
Guenter Roeck
6
5.50%
1
16.67%
Roger Quadros
5
4.59%
1
16.67%
Total
109
100.00%
6
100.00%



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

	/*
         * xhci_suspend() needs `do_wakeup` to know whether host is allowed
         * to do wakeup during suspend. Since xhci_plat_suspend is currently
         * only designed for system suspend, device_may_wakeup() is enough
         * to dertermine whether host is allowed to do wakeup. Need to
         * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
         * also applies to runtime suspend.
         */
	return xhci_suspend(xhci, device_may_wakeup(dev));
}

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2.27%
1
25.00%
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1
2.27%
1
25.00%
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4
100.00%



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

	ret = xhci_priv_resume_quirk(hcd);
	if (ret)
		return ret;

	return xhci_resume(xhci, 0);
}

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1
1.75%
1
33.33%
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57
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3
100.00%



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

	return xhci_suspend(xhci, true);
}

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static int __maybe_unused xhci_plat_runtime_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);
}

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static const struct dev_pm_ops xhci_plat_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)

	SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
			   xhci_plat_runtime_resume,
			   NULL)
};


static const struct acpi_device_id usb_xhci_acpi_match[] = {
	/* XHCI-compliant USB Controller */
	{ "PNP0D10", },
	{ }
};
MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);


static struct platform_driver usb_xhci_driver = {
	.probe	= xhci_plat_probe,
	.remove	= xhci_plat_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver	= {
		.name = "xhci-hcd",
		.pm = &xhci_plat_pm_ops,
		.of_match_table = of_match_ptr(usb_xhci_of_match),
		.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
        },
};
MODULE_ALIAS("platform:xhci-hcd");



static int __init xhci_plat_init(void)
{
	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
	return platform_driver_register(&usb_xhci_driver);
}
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module_init(xhci_plat_init);



static void __exit xhci_plat_exit(void)
{
	platform_driver_unregister(&usb_xhci_driver);
}
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module_exit(xhci_plat_exit);

MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
MODULE_LICENSE("GPL");
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18.63%
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21.43%
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9.71%
1
1.79%
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114
6.47%
4
7.14%
Gregory CLEMENT
98
5.57%
4
7.14%
Vikas Sajjan
94
5.34%
1
1.79%
Maxime Ripard
89
5.05%
2
3.57%
Roger Quadros
79
4.49%
3
5.36%
Duc Dang
70
3.98%
2
3.57%
Arnd Bergmann
61
3.46%
2
3.57%
Adam Wallis
57
3.24%
3
5.36%
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2.73%
3
5.36%
Simon Horman
25
1.42%
1
1.79%
Varka Bhadram
23
1.31%
1
1.79%
Thomas Petazzoni
22
1.25%
2
3.57%
Xenia Ragiadakou
22
1.25%
1
1.79%
William Wu
19
1.08%
1
1.79%
Thang Q. Nguyen
15
0.85%
1
1.79%
Himangi Saraogi
14
0.80%
1
1.79%
Pratyush Anand
13
0.74%
1
1.79%
Al Cooper
10
0.57%
1
1.79%
Geert Uytterhoeven
9
0.51%
1
1.79%
Peter Chen
9
0.51%
1
1.79%
Lu Baolu
6
0.34%
1
1.79%
Guenter Roeck
6
0.34%
1
1.79%
Heikki Krogerus
4
0.23%
1
1.79%
Greg Kroah-Hartman
2
0.11%
2
3.57%
Julia Lawall
2
0.11%
1
1.79%
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Directory: drivers/usb/host

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