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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3cd703f483
Commit08f871a3ac("usb: dwc3: host: convey the PHYs to xhci") added forwarding of the generic PHYs from DWC3 core to the instantiated XHCI-plat device. However XHCI(-plat) driver never gained support for generic PHYs, thus the lookup added by that commit is never used. In meantime the commitd64ff406e5("usb: dwc3: use bus->sysdev for DMA configuration") incorrectly changed the device used for creating lookup, making the lookup useless and generic PHYs inaccessible from XHCI device. However since commit178a0bce05("usb: core: hcd: integrate the PHY wrapper into the HCD core") USB HCD already handles generic PHYs acquired from the HCD's 'sysdev', which in this case is DWC3 core device. This means that creating any custom lookup entries for XHCI driver is no longer needed and can be simply removed. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
135 lines
2.9 KiB
C
135 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(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(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 != -EPROBE_DEFER)
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dev_err(dwc->dev, "missing host IRQ\n");
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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++].name = "usb3-lpm-capable";
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if (dwc->usb2_lpm_disable)
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props[prop_idx++].name = "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++].name = "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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