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authorRobert Baldyga <r.baldyga@samsung.com>2015-07-28 07:19:59 +0200
committerFelipe Balbi <balbi@ti.com>2015-07-30 11:43:35 -0500
commit02ded1b0d8e73dad7d2626c960ef20fb7dc30753 (patch)
tree7353424bd547ab0c43cc92312939a5edffde4ff6 /include/linux/usb
parentffd9a0fcbbed300b55f84e8397e96c2edd06cbdf (diff)
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 <r.baldyga@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'include/linux/usb')
-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 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;
@@ -621,6 +622,15 @@ static inline int gadget_is_altset_supported(struct usb_gadget *g)
}
/**
+ * 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
*/