/*
* 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/signal.h>
#include <linux/platform_device.h>
static struct clk *usb_host_clock;
static int ohci_ep93xx_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) {
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_ep93xx_hc_driver = {
.description = hcd_name,
.product_desc = "EP93xx OHCI",
.hcd_priv_size = sizeof(struct ohci_hcd),
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
.start = ohci_ep93xx_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_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);
ohci_hcd_init(hcd_to_ohci(hcd));
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);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
clk_disable(usb_host_clock);
return 0;
}
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,
},
};
MODULE_ALIAS("platform:ep93xx-ohci");
