ehci-xls.c

Go to the documentation of this file.

/*
 * EHCI HCD for Netlogic XLS processors.
 *
 * (C) Copyright 2011 Netlogic Microsystems Inc.
 *
 *  Based on various ehci-*.c drivers
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <linux/platform_device.h>

static int ehci_xls_setup(struct usb_hcd *hcd)
{
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);

    ehci->caps = hcd->regs;

    return ehci_setup(hcd);
}

int ehci_xls_probe_internal(const struct hc_driver *driver,
    struct platform_device *pdev)
{
    struct usb_hcd  *hcd;
    struct resource *res;
    int retval, irq;

    /* Get our IRQ from an earlier registered Platform Resource */
    irq = platform_get_irq(pdev, 0);
    if (irq < 0) {
        dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
                dev_name(&pdev->dev));
        return -ENODEV;
    }

    /* Get our Memory Handle */
    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    if (!res) {
        dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
                dev_name(&pdev->dev));
        return -ENODEV;
    }
    hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
    if (!hcd) {
        retval = -ENOMEM;
        goto err1;
    }

    hcd->rsrc_start = res->start;
    hcd->rsrc_len = resource_size(res);

    if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
                driver->description)) {
        dev_dbg(&pdev->dev, "controller already in use\n");
        retval = -EBUSY;
        goto err2;
    }
    hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);

    if (hcd->regs == NULL) {
        dev_dbg(&pdev->dev, "error mapping memory\n");
        retval = -EFAULT;
        goto err3;
    }

    retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
    if (retval != 0)
        goto err4;
    return retval;

err4:
    iounmap(hcd->regs);
err3:
    release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
    usb_put_hcd(hcd);
err1:
    dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
            retval);
    return retval;
}

static struct hc_driver ehci_xls_hc_driver = {
    .description    = hcd_name,
    .product_desc   = "XLS EHCI Host Controller",
    .hcd_priv_size  = sizeof(struct ehci_hcd),
    .irq        = ehci_irq,
    .flags      = HCD_USB2 | HCD_MEMORY,
    .reset      = ehci_xls_setup,
    .start      = ehci_run,
    .stop       = ehci_stop,
    .shutdown   = ehci_shutdown,

    .urb_enqueue    = ehci_urb_enqueue,
    .urb_dequeue    = ehci_urb_dequeue,
    .endpoint_disable = ehci_endpoint_disable,
    .endpoint_reset = ehci_endpoint_reset,

    .get_frame_number = ehci_get_frame,

    .hub_status_data = ehci_hub_status_data,
    .hub_control    = ehci_hub_control,
    .bus_suspend    = ehci_bus_suspend,
    .bus_resume = ehci_bus_resume,
    .relinquish_port = ehci_relinquish_port,
    .port_handed_over = ehci_port_handed_over,

    .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static int ehci_xls_probe(struct platform_device *pdev)
{
    if (usb_disabled())
        return -ENODEV;

    return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
}

static int ehci_xls_remove(struct platform_device *pdev)
{
    struct usb_hcd *hcd = platform_get_drvdata(pdev);

    usb_remove_hcd(hcd);
    iounmap(hcd->regs);
    release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
    usb_put_hcd(hcd);
    return 0;
}

MODULE_ALIAS("ehci-xls");

static struct platform_driver ehci_xls_driver = {
    .probe      = ehci_xls_probe,
    .remove     = ehci_xls_remove,
    .shutdown   = usb_hcd_platform_shutdown,
    .driver     = {
        .name = "ehci-xls",
    },
};