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133 lines
3.0 KiB
133 lines
3.0 KiB
// 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 <[email protected]>, |
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*/ |
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#include <linux/acpi.h> |
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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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ACPI_COMPANION_SET(&xhci->dev, ACPI_COMPANION(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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