Release 4.16 drivers/usb/dwc3/host.c

// SPDX-License-Identifier: GPL-2.0
/**
 * host.c - DesignWare USB3 DRD Controller Host Glue
 *
 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
 *
 * Authors: Felipe Balbi <balbi@ti.com>,
 */

#include <linux/platform_device.h>

#include "core.h"



static int dwc3_host_get_irq(struct dwc3 *dwc)
{
	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
	int irq;

	irq = platform_get_irq_byname(dwc3_pdev, "host");
	if (irq > 0)
		goto out;

	if (irq == -EPROBE_DEFER)
		goto out;

	irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
	if (irq > 0)
		goto out;

	if (irq == -EPROBE_DEFER)
		goto out;

	irq = platform_get_irq(dwc3_pdev, 0);
	if (irq > 0)
		goto out;

	if (irq != -EPROBE_DEFER)
		dev_err(dwc->dev, "missing host IRQ\n");

	if (!irq)
		irq = -EINVAL;

out:
	return irq;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
89
67.94%
1
33.33%
Felipe Balbi
42
32.06%
2
66.67%
Total
131
100.00%
3
100.00%



int dwc3_host_init(struct dwc3 *dwc)
{
	struct property_entry	props[3];
	struct platform_device	*xhci;
	int			ret, irq;
	struct resource		*res;
	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
	int			prop_idx = 0;

	irq = dwc3_host_get_irq(dwc);
	if (irq < 0)
		return irq;

	res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
	if (!res)
		res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
				"dwc_usb3");
	if (!res)
		res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
	if (!res)
		return -ENOMEM;

	dwc->xhci_resources[1].start = irq;
	dwc->xhci_resources[1].end = irq;
	dwc->xhci_resources[1].flags = res->flags;
	dwc->xhci_resources[1].name = res->name;

	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
	if (!xhci) {
		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
		return -ENOMEM;
	}

	xhci->dev.parent	= dwc->dev;

	dwc->xhci = xhci;

	ret = platform_device_add_resources(xhci, dwc->xhci_resources,
						DWC3_XHCI_RESOURCES_NUM);
	if (ret) {
		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
		goto err1;
	}

	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));

	if (dwc->usb3_lpm_capable)
		props[prop_idx++].name = "usb3-lpm-capable";

	/**
         * WORKAROUND: dwc3 revisions <=3.00a have a limitation
         * where Port Disable command doesn't work.
         *
         * The suggested workaround is that we avoid Port Disable
         * completely.
         *
         * This following flag tells XHCI to do just that.
         */
	if (dwc->revision <= DWC3_REVISION_300A)
		props[prop_idx++].name = "quirk-broken-port-ped";

	if (prop_idx) {
		ret = platform_device_add_properties(xhci, props);
		if (ret) {
			dev_err(dwc->dev, "failed to add properties to xHCI\n");
			goto err1;
		}
	}

	phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
			  dev_name(dwc->dev));
	phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
			  dev_name(dwc->dev));

	ret = platform_device_add(xhci);
	if (ret) {
		dev_err(dwc->dev, "failed to register xHCI device\n");
		goto err2;
	}

	return 0;
err2:
	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
			  dev_name(dwc->dev));
	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
			  dev_name(dwc->dev));
err1:
	platform_device_put(xhci);
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Felipe Balbi
219
50.81%
4
33.33%
Heikki Krogerus
87
20.19%
2
16.67%
Roger Quadros
78
18.10%
1
8.33%
Pratyush Anand
35
8.12%
1
8.33%
Ido Shayevitz
4
0.93%
1
8.33%
Arnd Bergmann
4
0.93%
1
8.33%
Robert Baldyga
3
0.70%
1
8.33%
Vivek Gautam
1
0.23%
1
8.33%
Total
431
100.00%
12
100.00%



void dwc3_host_exit(struct dwc3 *dwc)
{
	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
			  dev_name(dwc->dev));
	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
			  dev_name(dwc->dev));
	platform_device_unregister(dwc->xhci);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Heikki Krogerus
32
65.31%
1
50.00%
Felipe Balbi
17
34.69%
1
50.00%
Total
49
100.00%
2
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Felipe Balbi
284
45.88%
4
28.57%
Roger Quadros
167
26.98%
1
7.14%
Heikki Krogerus
119
19.22%
2
14.29%
Pratyush Anand
35
5.65%
1
7.14%
Ido Shayevitz
4
0.65%
1
7.14%
Arnd Bergmann
4
0.65%
1
7.14%
Robert Baldyga
3
0.48%
1
7.14%
Greg Kroah-Hartman
2
0.32%
2
14.29%
Vivek Gautam
1
0.16%
1
7.14%
Total
619
100.00%
14
100.00%
Directory: drivers/usb/dwc3

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