ohci-xls.c

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/*
 * OHCI HCD for Netlogic XLS processors.
 *
 * (C) Copyright 2011 Netlogic Microsystems Inc.
 *
 *  Based on ohci-au1xxx.c, and other Linux OHCI 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>
#include <linux/signal.h>

static int ohci_xls_probe_internal(const struct hc_driver *driver,
            struct platform_device *dev)
{
    struct resource *res;
    struct usb_hcd *hcd;
    int retval, irq;

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

    /* Get our Memory Handle */
    res = platform_get_resource(dev, IORESOURCE_MEM, 0);
    if (!res) {
        dev_err(&dev->dev, "MMIO Handle incorrect!\n");
        return -ENODEV;
    }

    hcd = usb_create_hcd(driver, &dev->dev, "XLS");
    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(&dev->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(&dev->dev, "error mapping memory\n");
        retval = -EFAULT;
        goto err3;
    }

    retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | 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(&dev->dev, "init fail, %d\n", retval);
    return retval;
}

static int ohci_xls_reset(struct usb_hcd *hcd)
{
    struct ohci_hcd *ohci = hcd_to_ohci(hcd);

    ohci_hcd_init(ohci);
    return ohci_init(ohci);
}

static int __devinit ohci_xls_start(struct usb_hcd *hcd)
{
    struct ohci_hcd *ohci;
    int ret;

    ohci = hcd_to_ohci(hcd);
    ret = ohci_run(ohci);
    if (ret < 0) {
        dev_err(hcd->self.controller, "can't start %s\n",
            hcd->self.bus_name);
        ohci_stop(hcd);
        return ret;
    }
    return 0;
}

static struct hc_driver ohci_xls_hc_driver = {
    .description    = hcd_name,
    .product_desc   = "XLS OHCI Host Controller",
    .hcd_priv_size  = sizeof(struct ohci_hcd),
    .irq        = ohci_irq,
    .flags      = HCD_MEMORY | HCD_USB11,
    .reset      = ohci_xls_reset,
    .start      = ohci_xls_start,
    .stop       = ohci_stop,
    .shutdown   = ohci_shutdown,
    .urb_enqueue    = ohci_urb_enqueue,
    .urb_dequeue    = ohci_urb_dequeue,
    .endpoint_disable = ohci_endpoint_disable,
    .get_frame_number = ohci_get_frame,
    .hub_status_data = ohci_hub_status_data,
    .hub_control    = ohci_hub_control,
#ifdef CONFIG_PM
    .bus_suspend    = ohci_bus_suspend,
    .bus_resume = ohci_bus_resume,
#endif
    .start_port_reset = ohci_start_port_reset,
};

static int ohci_xls_probe(struct platform_device *dev)
{
    int ret;

    pr_debug("In ohci_xls_probe");
    if (usb_disabled())
        return -ENODEV;
    ret = ohci_xls_probe_internal(&ohci_xls_hc_driver, dev);
    return ret;
}

static int ohci_xls_remove(struct platform_device *dev)
{
    struct usb_hcd *hcd = platform_get_drvdata(dev);

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

static struct platform_driver ohci_xls_driver = {
    .probe      = ohci_xls_probe,
    .remove     = ohci_xls_remove,
    .shutdown   = usb_hcd_platform_shutdown,
    .driver     = {
        .name   = "ohci-xls-0",
        .owner  = THIS_MODULE,
    },
};