summaryrefslogtreecommitdiff
path: root/include/linux/usb/gadget.h
diff options
context:
space:
mode:
authorRobert Baldyga <r.baldyga@samsung.com>2015-07-28 07:20:00 +0200
committerFelipe Balbi <balbi@ti.com>2015-07-30 11:43:35 -0500
commitca1023c81dd10f76a5d0a8be2fdbe724fe7a126a (patch)
tree8fe9edd162240bf8d449b8b313c55239f60dadfc /include/linux/usb/gadget.h
parent02ded1b0d8e73dad7d2626c960ef20fb7dc30753 (diff)
usb: gadget: add 'quirk_zlp_not_supp' to usb_gadget
Due to some UDC controllers may not support zlp, usb gadget layer needs to provide a generic way to inform gadget functions about non-standard hardware limitations. This patch adds 'quirk_zlp_not_supp' field to struct usb_gadget and helper function gadget_is_zlp_supported(). It also sets 'quirk_zlp_not_supp' to 1 in musb UDC driver, which has such limitation. [ balbi@ti.com : make it build ] Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'include/linux/usb/gadget.h')
-rw-r--r--include/linux/usb/gadget.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index f195a76548f6..353a72096dda 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -574,6 +574,7 @@ struct usb_gadget {
unsigned quirk_ep_out_aligned_size:1;
unsigned quirk_altset_not_supp:1;
unsigned quirk_stall_not_supp:1;
+ unsigned quirk_zlp_not_supp:1;
unsigned is_selfpowered:1;
unsigned deactivated:1;
unsigned connected:1;
@@ -631,6 +632,15 @@ static inline int gadget_is_stall_supported(struct usb_gadget *g)
}
/**
+ * gadget_is_zlp_supported - return true iff the hardware supports zlp
+ * @g: controller to check for quirk
+ */
+static inline int gadget_is_zlp_supported(struct usb_gadget *g)
+{
+ return !g->quirk_zlp_not_supp;
+}
+
+/**
* gadget_is_dualspeed - return true iff the hardware handles high speed
* @g: controller that might support both high and full speeds
*/