/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * (C) Copyright 2002 Hewlett-Packard Company
 * (C) Copyright 2003-2005 MontaVista Software Inc.
 *
 * Bus Glue for PPC On-Chip OHCI driver
 * Tested on Freescale MPC5200 and IBM STB04xxx
 *
 * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
 *
 * This file is licenced under the GPL.
 */

#include <linux/platform_device.h>
#include <linux/signal.h>

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */

/**
 * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller.
 *
 * Store this function in the HCD's struct pci_driver as probe().
 */
static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
                          struct platform_device *pdev)
{
        int retval;
        struct usb_hcd *hcd;
        struct ohci_hcd *ohci;
        struct resource *res;
        int irq;

        pr_debug("initializing PPC-SOC USB Controller\n");

        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
        if (!res) {
                pr_debug(__FILE__ ": no irq\n");
                return -ENODEV;
        }
        irq = res->start;

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                pr_debug(__FILE__ ": no reg addr\n");
                return -ENODEV;
        }

        hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
        if (!hcd)
                return -ENOMEM;
        hcd->rsrc_start = res->start;
        hcd->rsrc_len = res->end - res->start + 1;

        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
                pr_debug(__FILE__ ": request_mem_region failed\n");
                retval = -EBUSY;
                goto err1;
        }

        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
        if (!hcd->regs) {
                pr_debug(__FILE__ ": ioremap failed\n");
                retval = -ENOMEM;
                goto err2;
        }

        ohci = hcd_to_ohci(hcd);
        ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;

#ifdef CONFIG_PPC_MPC52xx
        /* MPC52xx doesn't need frame_no shift */
        ohci->flags |= OHCI_QUIRK_FRAME_NO;
#endif
        ohci_hcd_init(ohci);

        retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
        if (retval == 0)
                return retval;

        pr_debug("Removing PPC-SOC USB Controller\n");

        iounmap(hcd->regs);
 err2:
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
        usb_put_hcd(hcd);
        return retval;
}


/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

/**
 * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
 * @pdev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_ppc_soc_probe().
 * It is always called from a thread
 * context, normally "rmmod", "apmd", or something similar.
 *
 */
static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
                struct platform_device *pdev)
{
        usb_remove_hcd(hcd);

        pr_debug("stopping PPC-SOC USB Controller\n");

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

static int __devinit
ohci_ppc_soc_start(struct usb_hcd *hcd)
{
        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
        int             ret;

        if ((ret = ohci_init(ohci)) < 0)
                return ret;

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

        return 0;
}

static const struct hc_driver ohci_ppc_soc_hc_driver = {
        .description =          hcd_name,
        .hcd_priv_size =        sizeof(struct ohci_hcd),

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

        /*
         * basic lifecycle operations
         */
        .start =                ohci_ppc_soc_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_ppc_soc_drv_probe(struct platform_device *pdev)
{
        int ret;

        if (usb_disabled())
                return -ENODEV;

        ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
        return ret;
}

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

        usb_hcd_ppc_soc_remove(hcd, pdev);
        return 0;
}

static struct platform_driver ohci_hcd_ppc_soc_driver = {
        .probe          = ohci_hcd_ppc_soc_drv_probe,
        .remove         = ohci_hcd_ppc_soc_drv_remove,
        .shutdown       = usb_hcd_platform_shutdown,
#ifdef  CONFIG_PM
        /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
        /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
#endif
        .driver         = {
                .name   = "ppc-soc-ohci",
                .owner  = THIS_MODULE,
        },
};

MODULE_ALIAS("platform:ppc-soc-ohci");