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usb: gadget: add 'quirk_stall_not_supp' to usb_gadget

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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>
This commit is contained in:
Robert Baldyga 2015-07-28 07:19:59 +02:00 committed by Felipe Balbi
parent ffd9a0fcbb
commit 02ded1b0d8
2 changed files with 11 additions and 0 deletions
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1
drivers/usb/gadget/udc/at91_udc.c
View File

@ -825,6 +825,7 @@ static void udc_reinit(struct at91_udc *udc)
INIT_LIST_HEAD(&udc->gadget.ep_list);
INIT_LIST_HEAD(&udc->gadget.ep0->ep_list);
udc->gadget.quirk_stall_not_supp = 1;
for (i = 0; i < NUM_ENDPOINTS; i++) {
struct at91_ep *ep = &udc->ep[i];

10
include/linux/usb/gadget.h
View File

@ -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;
@ -620,6 +621,15 @@ static inline int gadget_is_altset_supported(struct usb_gadget *g)
return !g->quirk_altset_not_supp;
}
/**
* 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