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/*
* Realtek Semiconductor Corp.
*
* ehci-dwc.c: DWC USB host controller
*
* Tony Wu (tonywu@realtek.com)
* Jan. 10, 2009
*/
#include <linux/platform_device.h>
#define EHCI_DWC_NAME "dwc_ehci"
/* called during probe() after chip reset completes */
static int
ehci_dwc_setup (struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
int retval = 0;
retval = ehci_halt (ehci);
if (retval)
return retval;
/* data structure init */
retval = ehci_init (hcd);
if (retval)
return retval;
if (ehci_is_TDI (ehci))
ehci_reset (ehci);
#ifdef CONFIG_USB_SUSPEND
/* REVISIT: the controller works fine for wakeup iff the root hub
* itself is "globally" suspended, but usbcore currently doesn't
* understand such things.
*
* System suspend currently expects to be able to suspend the entire
* device tree, device-at-a-time. If we failed selective suspend
* reports, system suspend would fail; so the root hub code must claim
* success. That's lying to usbcore, and it matters for for runtime
* PM scenarios with selective suspend and remote wakeup...
*/
if (ehci->no_selective_suspend && device_can_wakeup (&pdev->dev))
ehci_warn (ehci, "selective suspend/wakeup unavailable\n");
#endif
ehci_port_power(ehci, 0);
return retval;
}
struct hc_driver ehci_dwc_hc_driver = {
.description = hcd_name,
.product_desc = "EHCI Host Controller",
.hcd_priv_size = sizeof (struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_dwc_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ehci_get_frame,
/*
* root hub support
*/
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
#endif
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
};
int
ehci_dwc_drv_probe (struct platform_device *pdev)
{
struct hc_driver *phcd;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
int retval;
u32 dwc_usb_irq;
phcd = &ehci_dwc_hc_driver;
res = platform_get_resource (pdev, IORESOURCE_IRQ, 0);
if (res == NULL)
{
printk (KERN_ERR __FILE__ ": get irq resource failed!\n");
retval = -ENOMEM;
return retval;
}
dwc_usb_irq = res->start;
hcd = usb_create_hcd (phcd, &pdev->dev, dev_name(&pdev->dev));
if (hcd == NULL)
{
retval = -ENOMEM;
return retval;
}
res = platform_get_resource (pdev, IORESOURCE_MEM, 0);
if (res == NULL)
{
printk (KERN_ERR __FILE__ ": get memory resource failed!\n");
retval = -ENOMEM;
return retval;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = res->end - res->start + 1;
if (request_mem_region (hcd->rsrc_start, hcd->rsrc_len, EHCI_DWC_NAME) == NULL)
{
printk (KERN_ERR __FILE__ ": request_mem_region failed\n");
retval = -ENOMEM;
return retval;
}
hcd->regs = (void *) ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs)
{
printk(KERN_ERR __FILE__ ": ioremap failed\n");
release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
retval = -ENOMEM;
return retval;
}
ehci = hcd_to_ehci (hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs + HC_LENGTH (readl (&ehci->caps->hc_capbase));
ehci->hcs_params = readl (&ehci->caps->hcs_params);
retval = usb_add_hcd (hcd, dwc_usb_irq, IRQF_SHARED);
if (retval != 0)
{
release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
iounmap(hcd->regs);
}
return retval;
}
static int
ehci_dwc_drv_remove (struct platform_device *pdev)
{
struct usb_hcd *hcd;
hcd = platform_get_drvdata (pdev);
usb_remove_hcd (hcd);
if (hcd->driver->flags & HCD_MEMORY)
{
iounmap (hcd->regs);
release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
}
else
release_region (hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd (hcd);
return 0;
}
struct platform_driver ehci_dwc_driver = {
.probe = ehci_dwc_drv_probe,
.remove = ehci_dwc_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "dwc_ehci",
},
};
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