On Wed, Jul 08, 2015 at 01:19:31PM +0300, Roger Quadros wrote:
> The OTG core will use struct otg_hcd_ops to
> add/remove the HCD controller.
>
> The main purpose of this interface is to avoid directly
> calling usb_add/remove_hcd() from the OTG core as they
> wouldn't be defined in the built-in symbol table if
> CONFIG_USB is m.
>
Like patch 4, Would you let the OTG depends on HCD?
OTG needs dual-role, it is reasonable.
Peter
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
> ---
> include/linux/usb/hcd.h | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
> index c9aa779..4108288 100644
> --- a/include/linux/usb/hcd.h
> +++ b/include/linux/usb/hcd.h
> @@ -386,6 +386,20 @@ struct hc_driver {
>
> };
>
> +/**
> + * struct otg_hcd_ops - Interface between OTG core and HCD
> + *
> + * Provided by the HCD core to allow the OTG core to start/stop the HCD
> + *
> + * @add: function to add the HCD
> + * @remove: function to remove the HCD
> + */
> +struct otg_hcd_ops {
> + int (*add)(struct usb_hcd *hcd,
> + unsigned int irqnum, unsigned long irqflags);
> + void (*remove)(struct usb_hcd *hcd);
> +};
> +
> static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd)
> {
> return hcd->driver->flags & HCD_BH;
> --
> 2.1.4
>
--
Best Regards,
Peter Chen
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