On Wed, May 28, 2014 at 03:09:16PM +0800, Li Jun wrote:
> From: Li Jun <b47624@xxxxxxxxxxxxx>
>
> Peripheral answers OTG status selector request from host according to
> host request flag of gadget, length is 1. this flag may be set by application
> via kernel interface.
via ioctl or sysfs?
Does the HNP polling be used when the B-device wants to give up host
role?
Peter
>
> Signed-off-by: Li Jun <b47624@xxxxxxxxxxxxx>
> ---
> drivers/usb/chipidea/udc.c | 22 +++++++++++++++++-----
> 1 file changed, 17 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index d683968..163adf9 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -815,7 +815,10 @@ __acquires(hwep->lock)
> return -ENOMEM;
>
> req->complete = isr_get_status_complete;
> - req->length = 2;
> + if (setup->wIndex == OTG_STS_SELECTOR)
> + req->length = 1;
> + else
> + req->length = 2;
> req->buf = kzalloc(req->length, gfp_flags);
> if (req->buf == NULL) {
> retval = -ENOMEM;
> @@ -823,8 +826,16 @@ __acquires(hwep->lock)
> }
>
> if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
> - /* Assume that device is bus powered for now. */
> - *(u16 *)req->buf = ci->remote_wakeup << 1;
> + if ((setup->wIndex == OTG_STS_SELECTOR) &&
> + ci_otg_is_fsm_mode(ci)) {
> + if (ci->gadget.host_request_flag)
> + *(u8 *)req->buf = HOST_REQUEST_FLAG;
> + else
> + *(u8 *)req->buf = 0;
> + } else {
> + /* Assume that device is bus powered for now. */
> + *(u16 *)req->buf = ci->remote_wakeup << 1;
> + }
> retval = 0;
> } else if ((setup->bRequestType & USB_RECIP_MASK) \
> == USB_RECIP_ENDPOINT) {
> @@ -1003,8 +1014,9 @@ __acquires(ci->lock)
> type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
> type != (USB_DIR_IN|USB_RECIP_INTERFACE))
> goto delegate;
> - if (le16_to_cpu(req.wLength) != 2 ||
> - le16_to_cpu(req.wValue) != 0)
> + if ((le16_to_cpu(req.wLength) != 2 &&
> + le16_to_cpu(req.wLength) != 1) ||
> + le16_to_cpu(req.wValue) != 0)
> break;
> err = isr_get_status_response(ci, &req);
> break;
> --
> 1.7.9.5
>
--
Best Regards,
Peter Chen
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