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/*
* Generic platform ohci driver
*
* Copyright 2007 Michael Buesch <m@bues.ch>
* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
*
* Derived from the OCHI-SSB driver
* Derived from the OHCI-PCI driver
* Copyright 1999 Roman Weissgaerber
* Copyright 2000-2002 David Brownell
* Copyright 1999 Linus Torvalds
* Copyright 1999 Gregory P. Smith
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI generic platform driver"
static const char hcd_name[] = "ohci-platform";
static int ohci_platform_reset(struct usb_hcd *hcd)
{
struct platform_device *pdev = to_platform_device(hcd->self.controller);
struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (pdata->big_endian_desc)
ohci->flags |= OHCI_QUIRK_BE_DESC;
if (pdata->big_endian_mmio)
ohci->flags |= OHCI_QUIRK_BE_MMIO;
if (pdata->no_big_frame_no)
ohci->flags |= OHCI_QUIRK_FRAME_NO;
if (pdata->num_ports)
ohci->num_ports = pdata->num_ports;
return ohci_setup(hcd);
}
static struct hc_driver __read_mostly ohci_platform_hc_driver;
static const struct ohci_driver_overrides platform_overrides __initconst = {
.product_desc = "Generic Platform OHCI controller",
.reset = ohci_platform_reset,
};
static int ohci_platform_probe(struct platform_device *dev)
{
struct usb_hcd *hcd;
struct resource *res_mem;
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
int irq;
int err = -ENOMEM;
if (!pdata) {
WARN_ON(1);
return -ENODEV;
}
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(dev, 0);
if (irq < 0) {
dev_err(&dev->dev, "no irq provided");
return irq;
}
res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!res_mem) {
dev_err(&dev->dev, "no memory resource provided");
return -ENXIO;
}
if (pdata->power_on) {
err = pdata->power_on(dev);
if (err < 0)
return err;
}
hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
dev_name(&dev->dev));
if (!hcd) {
err = -ENOMEM;
goto err_power;
}
hcd->rsrc_start = res_mem->start;
hcd->rsrc_len = resource_size(res_mem);
hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
if (IS_ERR(hcd->regs)) {
err = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err)
goto err_put_hcd;
device_wakeup_enable(hcd->self.controller);
platform_set_drvdata(dev, hcd);
return err;
err_put_hcd:
usb_put_hcd(hcd);
err_power:
if (pdata->power_off)
pdata->power_off(dev);
return err;
}
static int ohci_platform_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
if (pdata->power_off)
pdata->power_off(dev);
return 0;
}
#ifdef CONFIG_PM
static int ohci_platform_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev->platform_data;
struct platform_device *pdev =
container_of(dev, struct platform_device, dev);
bool do_wakeup = device_may_wakeup(dev);
int ret;
ret = ohci_suspend(hcd, do_wakeup);
if (ret)
return ret;
if (pdata->power_suspend)
pdata->power_suspend(pdev);
return ret;
}
static int ohci_platform_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
struct platform_device *pdev =
container_of(dev, struct platform_device, dev);
if (pdata->power_on) {
int err = pdata->power_on(pdev);
if (err < 0)
return err;
}
ohci_resume(hcd, false);
return 0;
}
#else /* !CONFIG_PM */
#define ohci_platform_suspend NULL
#define ohci_platform_resume NULL
#endif /* CONFIG_PM */
static const struct platform_device_id ohci_platform_table[] = {
{ "ohci-platform", 0 },
{ }
};
MODULE_DEVICE_TABLE(platform, ohci_platform_table);
static const struct dev_pm_ops ohci_platform_pm_ops = {
.suspend = ohci_platform_suspend,
.resume = ohci_platform_resume,
};
static struct platform_driver ohci_platform_driver = {
.id_table = ohci_platform_table,
.probe = ohci_platform_probe,
.remove = ohci_platform_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.owner = THIS_MODULE,
.name = "ohci-platform",
.pm = &ohci_platform_pm_ops,
}
};
static int __init ohci_platform_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
return platform_driver_register(&ohci_platform_driver);
}
module_init(ohci_platform_init);
static void __exit ohci_platform_cleanup(void)
{
platform_driver_unregister(&ohci_platform_driver);
}
module_exit(ohci_platform_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");
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