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Commit c4fffe58 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
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USB: EHCI: Allow more methods for overriding 



Some EHCI compliant controllers may operate in Full-Speed only
mode. HCD_USB11 flag needs to be set instead of HCD_USB2 flag
for this reason. Allow controller drivers to override the
default hc_driver flags.

Some controller drivers may use root hub PM hooks to manage
the controller clocks and gpio. Allow controller drivers to
override bus_suspend and bus_resume methods.

Change-Id: I264b2173d0a48e31e581fa248b371e386c16823c
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent 40a16350

drivers/usb/host/ehci-hcd.c

+6 −0
Original line number Diff line number Diff line
@@ -1221,8 +1221,14 @@ void ehci_init_driver(struct hc_driver *drv, 


	if (over) {

		drv->hcd_priv_size += over->extra_priv_size;

		if (over->flags)

			drv->flags = over->flags;

		if (over->reset)

			drv->reset = over->reset;

		if (over->bus_suspend)

			drv->bus_suspend = over->bus_suspend;

		if (over->bus_resume)

			drv->bus_resume = over->bus_resume;

	}

}

EXPORT_SYMBOL_GPL(ehci_init_driver);

drivers/usb/host/ehci-hub.c

+4 −3
Original line number Diff line number Diff line
@@ -218,7 +218,7 @@ static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, 
	spin_unlock_irq(&ehci->lock);

}



static int ehci_bus_suspend (struct usb_hcd *hcd)

int ehci_bus_suspend(struct usb_hcd *hcd)

{

	struct ehci_hcd		*ehci = hcd_to_ehci (hcd);

	int			port;
@@ -359,10 +359,10 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) 
	hrtimer_cancel(&ehci->hrtimer);

	return 0;

}



EXPORT_SYMBOL(ehci_bus_suspend);



/* caller has locked the root hub, and should reset/reinit on error */

static int __maybe_unused ehci_bus_resume(struct usb_hcd *hcd)

int __maybe_unused ehci_bus_resume(struct usb_hcd *hcd)

{

	struct ehci_hcd		*ehci = hcd_to_ehci (hcd);

	u32			temp;
@@ -515,6 +515,7 @@ skip_clear_resume: 
	spin_unlock_irq(&ehci->lock);

	return -ESHUTDOWN;

}

EXPORT_SYMBOL(ehci_bus_resume);



#else

drivers/usb/host/ehci.h

+5 −0
Original line number Diff line number Diff line
@@ -802,7 +802,10 @@ static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x) 


struct ehci_driver_overrides {

	size_t		extra_priv_size;

	int		flags;

	int		(*reset)(struct usb_hcd *hcd);

	int		(*bus_suspend)(struct usb_hcd *hcd);

	int		(*bus_resume)(struct usb_hcd *hcd);

};



extern void	ehci_init_driver(struct hc_driver *drv,
@@ -810,6 +813,8 @@ extern void ehci_init_driver(struct hc_driver *drv, 
extern int	ehci_setup(struct usb_hcd *hcd);



#ifdef CONFIG_PM

extern int ehci_bus_suspend(struct usb_hcd *hcd);

extern int ehci_bus_resume(struct usb_hcd *hcd);

extern int	ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);

extern int	ehci_resume(struct usb_hcd *hcd, bool hibernated);

#endif	/* CONFIG_PM */