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/**
* host.c - DesignWare USB3 DRD Controller Host Glue
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/platform_device.h>
#include "core.h"
static int dwc3_host_get_irq(struct dwc3 *dwc)
{
struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
int irq;
irq = platform_get_irq_byname(dwc3_pdev, "host");
if (irq > 0)
goto out;
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
if (irq > 0)
goto out;
if (irq == -EPROBE_DEFER)
goto out;
irq = platform_get_irq(dwc3_pdev, 0);
if (irq > 0)
goto out;
if (irq != -EPROBE_DEFER)
dev_err(dwc->dev, "missing host IRQ\n");
if (!irq)
irq = -EINVAL;
out:
return irq;
}
int dwc3_host_init(struct dwc3 *dwc)
{
struct property_entry props[3];
struct platform_device *xhci;
int ret, irq;
struct resource *res;
struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
int prop_idx = 0;
irq = dwc3_host_get_irq(dwc);
if (irq < 0)
return irq;
res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
if (!res)
res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
"dwc_usb3");
if (!res)
res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
if (!res)
return -ENOMEM;
dwc->xhci_resources[1].start = irq;
dwc->xhci_resources[1].end = irq;
dwc->xhci_resources[1].flags = res->flags;
dwc->xhci_resources[1].name = res->name;
xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
if (!xhci) {
dev_err(dwc->dev, "couldn't allocate xHCI device\n");
return -ENOMEM;
}
xhci->dev.parent = dwc->dev;
dwc->xhci = xhci;
ret = platform_device_add_resources(xhci, dwc->xhci_resources,
DWC3_XHCI_RESOURCES_NUM);
if (ret) {
dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
goto err1;
}
memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
if (dwc->usb3_lpm_capable)
props[prop_idx++].name = "usb3-lpm-capable";
/**
* WORKAROUND: dwc3 revisions <=3.00a have a limitation
* where Port Disable command doesn't work.
*
* The suggested workaround is that we avoid Port Disable
* completely.
*
* This following flag tells XHCI to do just that.
*/
if (dwc->revision <= DWC3_REVISION_300A)
props[prop_idx++].name = "quirk-broken-port-ped";
if (prop_idx) {
ret = platform_device_add_properties(xhci, props);
if (ret) {
dev_err(dwc->dev, "failed to add properties to xHCI\n");
goto err1;
}
}
phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
dev_name(dwc->dev));
phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
dev_name(dwc->dev));
ret = platform_device_add(xhci);
if (ret) {
dev_err(dwc->dev, "failed to register xHCI device\n");
goto err2;
}
return 0;
err2:
phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
dev_name(dwc->dev));
phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
dev_name(dwc->dev));
err1:
platform_device_put(xhci);
return ret;
}
void dwc3_host_exit(struct dwc3 *dwc)
{
phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
dev_name(dwc->dev));
phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
dev_name(dwc->dev));
platform_device_unregister(dwc->xhci);
}
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