ohci-sh.c

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/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * Copyright (C) 2008 Renesas Solutions Corp.
 *
 * Author : Yoshihiro Shimoda <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/platform_device.h>

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

    ohci_hcd_init(ohci);
    ohci_init(ohci);
    ohci_run(ohci);
    return 0;
}

static const struct hc_driver ohci_sh_hc_driver = {
    .description =      hcd_name,
    .product_desc =     "SuperH OHCI",
    .hcd_priv_size =    sizeof(struct ohci_hcd),

    /*
     * generic hardware linkage
     */
    .irq =          ohci_irq,
    .flags =        HCD_USB11 | HCD_MEMORY,

    /*
     * basic lifecycle operations
     */
    .start =        ohci_sh_start,
    .stop =         ohci_stop,
    .shutdown =     ohci_shutdown,

    /*
     * managing i/o requests and associated device resources
     */
    .urb_enqueue =      ohci_urb_enqueue,
    .urb_dequeue =      ohci_urb_dequeue,
    .endpoint_disable = ohci_endpoint_disable,

    /*
     * scheduling support
     */
    .get_frame_number = ohci_get_frame,

    /*
     * root hub support
     */
    .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_hcd_sh_probe(struct platform_device *pdev)
{
    struct resource *res = NULL;
    struct usb_hcd *hcd = NULL;
    int irq = -1;
    int ret;

    if (usb_disabled())
        return -ENODEV;

    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    if (!res) {
        dev_err(&pdev->dev, "platform_get_resource error.\n");
        return -ENODEV;
    }

    irq = platform_get_irq(pdev, 0);
    if (irq < 0) {
        dev_err(&pdev->dev, "platform_get_irq error.\n");
        return -ENODEV;
    }

    /* initialize hcd */
    hcd = usb_create_hcd(&ohci_sh_hc_driver, &pdev->dev, (char *)hcd_name);
    if (!hcd) {
        dev_err(&pdev->dev, "Failed to create hcd\n");
        return -ENOMEM;
    }

    hcd->regs = (void __iomem *)res->start;
    hcd->rsrc_start = res->start;
    hcd->rsrc_len = resource_size(res);
    ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
    if (ret != 0) {
        dev_err(&pdev->dev, "Failed to add hcd\n");
        usb_put_hcd(hcd);
        return ret;
    }

    return ret;
}

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

    usb_remove_hcd(hcd);
    usb_put_hcd(hcd);

    return 0;
}

static struct platform_driver ohci_hcd_sh_driver = {
    .probe      = ohci_hcd_sh_probe,
    .remove     = ohci_hcd_sh_remove,
    .shutdown   = usb_hcd_platform_shutdown,
    .driver     = {
        .name   = "sh_ohci",
        .owner  = THIS_MODULE,
    },
};

MODULE_ALIAS("platform:sh_ohci");