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| author |   Robert Baldyga <r.baldyga@samsung.com> | 2015-07-28 07:19:59 +0200 |
|---|---|---|
| committer |   Felipe Balbi <balbi@ti.com> | 2015-07-30 11:43:35 -0500 |
| commit | 02ded1b0d8e73dad7d2626c960ef20fb7dc30753 (patch) | |
| tree | 7353424bd547ab0c43cc92312939a5edffde4ff6 /include/linux/usb/gadget.h | |
| parent | usb: gadget: add 'quirk_altset_not_supp' to usb_gadget (diff) | |
| download | linux-dev-02ded1b0d8e73dad7d2626c960ef20fb7dc30753.tar.xz linux-dev-02ded1b0d8e73dad7d2626c960ef20fb7dc30753.zip | |
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/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 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 */ |