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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5eb5afb078
We should not be reaching into property entries and initialize them by hand, but rather use proper initializer macros. This way we can alter internal representation of property entries with no visible changes to their users. Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Felipe Balbi <balbi@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/**
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* host.c - DesignWare USB3 DRD Controller Host Glue
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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*/
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#include <linux/platform_device.h>
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#include "core.h"
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static int dwc3_host_get_irq(struct dwc3 *dwc)
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{
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struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
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int irq;
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irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
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if (irq > 0)
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goto out;
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if (irq == -EPROBE_DEFER)
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goto out;
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irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
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if (irq > 0)
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goto out;
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if (irq == -EPROBE_DEFER)
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goto out;
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irq = platform_get_irq(dwc3_pdev, 0);
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if (irq > 0)
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goto out;
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if (!irq)
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irq = -EINVAL;
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out:
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return irq;
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}
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int dwc3_host_init(struct dwc3 *dwc)
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{
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struct property_entry props[4];
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struct platform_device *xhci;
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int ret, irq;
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struct resource *res;
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struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
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int prop_idx = 0;
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irq = dwc3_host_get_irq(dwc);
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if (irq < 0)
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return irq;
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res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
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if (!res)
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res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
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"dwc_usb3");
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if (!res)
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res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
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if (!res)
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return -ENOMEM;
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dwc->xhci_resources[1].start = irq;
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dwc->xhci_resources[1].end = irq;
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dwc->xhci_resources[1].flags = res->flags;
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dwc->xhci_resources[1].name = res->name;
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xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
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if (!xhci) {
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dev_err(dwc->dev, "couldn't allocate xHCI device\n");
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return -ENOMEM;
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}
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xhci->dev.parent = dwc->dev;
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dwc->xhci = xhci;
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ret = platform_device_add_resources(xhci, dwc->xhci_resources,
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DWC3_XHCI_RESOURCES_NUM);
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if (ret) {
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dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
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goto err;
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}
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memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
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if (dwc->usb3_lpm_capable)
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props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
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if (dwc->usb2_lpm_disable)
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props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
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/**
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* WORKAROUND: dwc3 revisions <=3.00a have a limitation
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* where Port Disable command doesn't work.
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*
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* The suggested workaround is that we avoid Port Disable
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* completely.
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*
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* This following flag tells XHCI to do just that.
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*/
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if (dwc->revision <= DWC3_REVISION_300A)
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props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
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if (prop_idx) {
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ret = platform_device_add_properties(xhci, props);
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if (ret) {
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dev_err(dwc->dev, "failed to add properties to xHCI\n");
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goto err;
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}
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}
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ret = platform_device_add(xhci);
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if (ret) {
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dev_err(dwc->dev, "failed to register xHCI device\n");
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goto err;
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}
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return 0;
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err:
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platform_device_put(xhci);
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return ret;
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}
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void dwc3_host_exit(struct dwc3 *dwc)
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{
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platform_device_unregister(dwc->xhci);
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}
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