From ffd9a0fcbbed300b55f84e8397e96c2edd06cbdf Mon Sep 17 00:00:00 2001 From: Robert Baldyga Date: Tue, 28 Jul 2015 07:19:58 +0200 Subject: usb: gadget: add 'quirk_altset_not_supp' to usb_gadget Due to some UDC controllers may not support altsettings, usb gadget layer needs to provide a generic way to inform gadget functions about non-standard hardware limitations. This patch adds 'quirk_altset_not_supp' field to struct usb_gadget and helper function gadget_is_altset_supported(). It also sets 'quirk_altset_not_supp' to 1 in pxa25x_udc and pxa27x_udc drivers, which have such limitation. Signed-off-by: Robert Baldyga Signed-off-by: Felipe Balbi --- include/linux/usb/gadget.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux/usb') diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index cea0511a1bc9..31be84b7e645 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -572,6 +572,7 @@ struct usb_gadget { unsigned a_hnp_support:1; unsigned a_alt_hnp_support:1; unsigned quirk_ep_out_aligned_size:1; + unsigned quirk_altset_not_supp:1; unsigned is_selfpowered:1; unsigned deactivated:1; unsigned connected:1; @@ -609,6 +610,16 @@ usb_ep_align_maybe(struct usb_gadget *g, struct usb_ep *ep, size_t len) round_up(len, (size_t)ep->desc->wMaxPacketSize); } +/** + * gadget_is_altset_supported - return true iff the hardware supports + * altsettings + * @g: controller to check for quirk + */ +static inline int gadget_is_altset_supported(struct usb_gadget *g) +{ + return !g->quirk_altset_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