forked from Minki/linux
7fd069d65d
It is no longer needed. The sysdev pointer is now used when assigning the ACPI companions to the xHCI ports and USB devices. Assigning the ACPI companion here resulted in the fwnode->secondary pointer to be replaced also for the parent dwc3 device since the primary fwnode (the ACPI companion) was shared. That was unintentional and it created potential side effects like resource leaks. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20220428111056.3558-3-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
139 lines
3.0 KiB
C
139 lines
3.0 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 - https://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/irq.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include "core.h"
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static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
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int irq, char *name)
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{
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struct platform_device *pdev = to_platform_device(dwc->dev);
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struct device_node *np = dev_of_node(&pdev->dev);
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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 = IORESOURCE_IRQ | irq_get_trigger_type(irq);
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if (!name && np)
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dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
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else
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dwc->xhci_resources[1].name = name;
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}
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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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dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
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goto out;
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}
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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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dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
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goto out;
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}
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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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dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
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goto out;
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}
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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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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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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 (DWC3_VER_IS_WITHIN(DWC3, ANY, 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 = device_create_managed_software_node(&xhci->dev, props, NULL);
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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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