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b5ea47570b
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Patrice Chotard <patrice.chotard@st.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
146 lines
3.3 KiB
C
146 lines
3.3 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[3];
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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 err1;
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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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/**
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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 err1;
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}
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}
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phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(dwc->dev));
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phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(dwc->dev));
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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 err2;
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}
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return 0;
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err2:
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phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(dwc->dev));
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phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(dwc->dev));
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err1:
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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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phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
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dev_name(dwc->dev));
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phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
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dev_name(dwc->dev));
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platform_device_unregister(dwc->xhci);
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}
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