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/*
* 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
*
* Bus Glue for ep93xx.
*
* Written by Christopher Hoover <ch@hpl.hp.com>
* Based on fragments of previous driver by Russell King et al.
*
* Modified for LH7A404 from ohci-sa1111.c
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
*
* Modified for pxa27x from ohci-lh7a404.c
* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
*
* Modified for ep93xx from ohci-pxa27x.c
* by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
* Based on an earlier driver by Ray Lehtiniemi
*
* This file is licenced under the GPL.
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI EP93xx driver"
static const char hcd_name[] = "ohci-ep93xx";
static struct hc_driver __read_mostly ohci_ep93xx_hc_driver;
static struct clk *usb_host_clock;
static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int ret;
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
hcd = usb_create_hcd(&ohci_ep93xx_hc_driver, &pdev->dev, "ep93xx");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
usb_host_clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usb_host_clock)) {
ret = PTR_ERR(usb_host_clock);
goto err_put_hcd;
}
clk_enable(usb_host_clock);
ret = usb_add_hcd(hcd, irq, 0);
if (ret)
goto err_clk_disable;
return 0;
err_clk_disable:
clk_disable(usb_host_clock);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
clk_disable(usb_host_clock);
usb_put_hcd(hcd);
return 0;
}
#ifdef CONFIG_PM
static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
bool do_wakeup = device_may_wakeup(&pdev->dev);
int ret;
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
ret = ohci_suspend(hcd, do_wakeup);
if (ret)
return ret;
ep93xx_stop_hc(&pdev->dev);
return ret;
}
static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
clk_enable(usb_host_clock);
ohci_resume(hcd, false);
return 0;
}
#endif
static struct platform_driver ohci_hcd_ep93xx_driver = {
.probe = ohci_hcd_ep93xx_drv_probe,
.remove = ohci_hcd_ep93xx_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
.suspend = ohci_hcd_ep93xx_drv_suspend,
.resume = ohci_hcd_ep93xx_drv_resume,
#endif
.driver = {
.name = "ep93xx-ohci",
.owner = THIS_MODULE,
},
};
static int __init ohci_ep93xx_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_ep93xx_hc_driver, NULL);
return platform_driver_register(&ohci_hcd_ep93xx_driver);
}
module_init(ohci_ep93xx_init);
static void __exit ohci_ep93xx_cleanup(void)
{
platform_driver_unregister(&ohci_hcd_ep93xx_driver);
}
module_exit(ohci_ep93xx_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ep93xx-ohci");
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