diff options
| author | Robert Baldyga <r.baldyga@samsung.com> | 2015-07-28 07:20:00 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-07-30 11:43:35 -0500 |
| commit | ca1023c81dd10f76a5d0a8be2fdbe724fe7a126a (patch) | |
| tree | 8fe9edd162240bf8d449b8b313c55239f60dadfc /include/linux/usb/gadget.h | |
| parent | 02ded1b0d8e73dad7d2626c960ef20fb7dc30753 (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.h | 10 |
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 */ |