On Tue, Apr 05, 2016 at 05:05:16PM +0300, Roger Quadros wrote:
> This is the a_set_b_hnp_enable flag in the OTG state machine
> diagram and must be set when the A-Host has successfully set
> the b_hnp_enable feature of the OTG-B-Peripheral attached to it.
>
> When this bit changes we kick our OTG FSM to make note of the
> change and act accordingly.
Since we have still not added fsm.a_set_b_hnp_en in OTG FSM, and this
patch set is mainly for DRD, would you please move out this patch from
this set?
Peter
>
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
> ---
> drivers/usb/core/hub.c | 17 +++++++++++++++--
> 1 file changed, 15 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
> index 38cc4ba..27e3b4c 100644
> --- a/drivers/usb/core/hub.c
> +++ b/drivers/usb/core/hub.c
> @@ -2273,6 +2273,7 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
> && udev->parent == udev->bus->root_hub) {
> struct usb_otg_descriptor *desc = NULL;
> struct usb_bus *bus = udev->bus;
> + struct usb_hcd *hcd = bus_to_hcd(bus);
> unsigned port1 = udev->portnum;
>
> /* descriptor may appear anywhere in config */
> @@ -2302,6 +2303,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
> dev_err(&udev->dev, "can't set HNP mode: %d\n",
> err);
> bus->b_hnp_enable = 0;
> + } else {
> + /* notify OTG fsm about a_set_b_hnp_enable */
> + usb_otg_kick_fsm(hcd->otg_dev);
> }
> } else if (desc->bLength == sizeof
> (struct usb_otg_descriptor)) {
> @@ -2312,10 +2316,14 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
> USB_DEVICE_A_ALT_HNP_SUPPORT,
> 0, NULL, 0,
> USB_CTRL_SET_TIMEOUT);
> - if (err < 0)
> + if (err < 0) {
> dev_err(&udev->dev,
> "set a_alt_hnp_support failed: %d\n",
> err);
> + } else {
> + /* notify OTG fsm about a_set_b_hnp_enable */
> + usb_otg_kick_fsm(hcd->otg_dev);
> + }
> }
> }
> #endif
> @@ -4355,8 +4363,13 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
> */
> if (!hdev->parent) {
> delay = HUB_ROOT_RESET_TIME;
> - if (port1 == hdev->bus->otg_port)
> + if (port1 == hdev->bus->otg_port) {
> hdev->bus->b_hnp_enable = 0;
> +#ifdef CONFIG_USB_OTG
> + /* notify OTG fsm about a_set_b_hnp_enable change */
> + usb_otg_kick_fsm(hcd->otg_dev);
> +#endif
> + }
> }
>
> /* Some low speed devices have problems with the quick delay, so */
> --
> 2.5.0
>
> --
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--
Best Regards,
Peter Chen
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