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Commit 02ded1b0 authored by Robert Baldyga's avatar Robert Baldyga Committed by Felipe Balbi
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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: default avatarRobert Baldyga <r.baldyga@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent ffd9a0fc

drivers/usb/gadget/udc/at91_udc.c

+1 −0
Original line number Diff line number Diff line
@@ -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];

include/linux/usb/gadget.h

+10 −0
Original line number Diff line number Diff line
@@ -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