On Mon, May 02, 2016 at 03:18:55PM +0300, Roger Quadros wrote:
> Introduce usb_otg_add/remove_hcd() for use by host
> controllers that are part of OTG/dual-role port.
>
> Non Device tree platforms can use the otg_dev argument
> to specify the OTG controller device. If otg_dev is NULL
> then the device tree node's otg-controller property is used to
> get the otg_dev device.
>
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Acked-by: Peter Chen <peter.chen@xxxxxxx>
> ---
> drivers/usb/core/hcd.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/usb/hcd.h | 4 ++++
> 2 files changed, 59 insertions(+)
>
> diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
> index 9484539..cfc8232 100644
> --- a/drivers/usb/core/hcd.c
> +++ b/drivers/usb/core/hcd.c
> @@ -46,6 +46,11 @@
> #include <linux/usb.h>
> #include <linux/usb/hcd.h>
> #include <linux/usb/phy.h>
> +#include <linux/usb/otg.h>
> +#include <linux/usb/of.h>
> +
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
>
> #include "usb.h"
>
> @@ -3013,6 +3018,56 @@ void usb_remove_hcd(struct usb_hcd *hcd)
> }
> EXPORT_SYMBOL_GPL(usb_remove_hcd);
>
> +static struct otg_hcd_ops otg_hcd_intf = {
> + .add = usb_add_hcd,
> + .remove = usb_remove_hcd,
> + .usb_bus_start_enum = usb_bus_start_enum,
> + .usb_control_msg = usb_control_msg,
> + .usb_hub_find_child = usb_hub_find_child,
> +};
> +
> +/**
> + * usb_otg_add_hcd - Register the HCD with OTG core.
> + * @hcd: the usb_hcd structure to initialize
> + * @irqnum: Interrupt line to allocate
> + * @irqflags: Interrupt type flags
> + * @otg_dev: OTG controller device managing this HCD
> + *
> + * Registers the HCD with OTG core. OTG core will call usb_add_hcd()
> + * or usb_remove_hcd() as necessary.
> + * If otg_dev is NULL then device tree node is checked for OTG
> + * controller device via the otg-controller property.
> + */
> +int usb_otg_add_hcd(struct usb_hcd *hcd,
> + unsigned int irqnum, unsigned long irqflags,
> + struct device *otg_dev)
> +{
> + struct device *dev = hcd->self.controller;
> +
> + if (!otg_dev) {
> + hcd->otg_dev = of_usb_get_otg(dev->of_node);
> + if (!hcd->otg_dev)
> + return -ENODEV;
> + } else {
> + hcd->otg_dev = otg_dev;
> + }
> +
> + return usb_otg_register_hcd(hcd, irqnum, irqflags, &otg_hcd_intf);
> +}
> +EXPORT_SYMBOL_GPL(usb_otg_add_hcd);
> +
> +/**
> + * usb_otg_remove_hcd - Unregister the HCD with OTG core.
> + * @hcd: the usb_hcd structure to remove
> + *
> + * Unregisters the HCD from the OTG core.
> + */
> +void usb_otg_remove_hcd(struct usb_hcd *hcd)
> +{
> + usb_otg_unregister_hcd(hcd);
> +}
> +EXPORT_SYMBOL_GPL(usb_otg_remove_hcd);
> +
> void
> usb_hcd_platform_shutdown(struct platform_device *dev)
> {
> diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
> index 2017cd4..adcf2e7 100644
> --- a/include/linux/usb/hcd.h
> +++ b/include/linux/usb/hcd.h
> @@ -472,6 +472,10 @@ extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
> extern int usb_add_hcd(struct usb_hcd *hcd,
> unsigned int irqnum, unsigned long irqflags);
> extern void usb_remove_hcd(struct usb_hcd *hcd);
> +extern int usb_otg_add_hcd(struct usb_hcd *hcd,
> + unsigned int irqnum, unsigned long irqflags,
> + struct device *otg_dev);
> +extern void usb_otg_remove_hcd(struct usb_hcd *hcd);
> extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1);
>
> struct platform_device;
> --
> 2.7.4
>
> --
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--
Best Regards,
Peter Chen
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