From 02ded1b0d8e73dad7d2626c960ef20fb7dc30753 Mon Sep 17 00:00:00 2001 From: Robert Baldyga Date: Tue, 28 Jul 2015 07:19:59 +0200 Subject: usb: gadget: add 'quirk_stall_not_supp' to usb_gadget Due to some UDC controllers may not support stalling, usb gadget layer needs to provide a generic way to inform gadget functions about non-standard hardware limitations. This patch adds 'quirk_stall_not_supp' field to struct usb_gadget and helper function gadget_is_stall_supported(). It also sets 'quirk_stall_not_supp' to 1 in at91_udc driver, which has such limitation. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi --- include/linux/usb/gadget.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include') diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 31be84b7e645..f195a76548f6 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -573,6 +573,7 @@ struct usb_gadget { unsigned a_alt_hnp_support:1; unsigned quirk_ep_out_aligned_size:1; unsigned quirk_altset_not_supp:1; + unsigned quirk_stall_not_supp:1; unsigned is_selfpowered:1; unsigned deactivated:1; unsigned connected:1; @@ -620,6 +621,15 @@ static inline int gadget_is_altset_supported(struct usb_gadget *g) return !g->quirk_altset_not_supp; } +/** + * gadget_is_stall_supported - return true iff the hardware supports stalling + * @g: controller to check for quirk + */ +static inline int gadget_is_stall_supported(struct usb_gadget *g) +{ + return !g->quirk_stall_not_supp; +} + /** * gadget_is_dualspeed - return true iff the hardware handles high speed * @g: controller that might support both high and full speeds -- cgit v1.2.3