From: Li Jun <[email protected]> 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.
Signed-off-by: Li Jun <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
