Commit 6abfa0f5 authored by Thinh Nguyen's avatar Thinh Nguyen Committed by Felipe Balbi
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usb: dwc3: gadget: Report isoc transfer frame number 



Implement the new frame_number API to report the isochronous interval
frame number. This patch checks and reports the interval in which the
isoc transfer was transmitted or received via the Isoc-First TRB SOF
number field.

Signed-off-by: default avatarThinh Nguyen <thinhn@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 6b69753f

drivers/usb/dwc3/core.h

+1 −0
Original line number Diff line number Diff line
@@ -784,6 +784,7 @@ enum dwc3_link_state { 
#define DWC3_TRB_CTRL_ISP_IMI		BIT(10)

#define DWC3_TRB_CTRL_IOC		BIT(11)

#define DWC3_TRB_CTRL_SID_SOFN(n)	(((n) & 0xffff) << 14)

#define DWC3_TRB_CTRL_GET_SID_SOFN(n)	(((n) & (0xffff << 14)) >> 14)



#define DWC3_TRBCTL_TYPE(n)		((n) & (0x3f << 4))

#define DWC3_TRBCTL_NORMAL		DWC3_TRB_CTRL_TRBCTL(1)

drivers/usb/dwc3/gadget.c

+13 −0
Original line number Diff line number Diff line
@@ -2339,6 +2339,19 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, 
	if (chain && (trb->ctrl & DWC3_TRB_CTRL_HWO))

		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;



	/*

	 * For isochronous transfers, the first TRB in a service interval must

	 * have the Isoc-First type. Track and report its interval frame number.

	 */

	if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&

	    (trb->ctrl & DWC3_TRBCTL_ISOCHRONOUS_FIRST)) {

		unsigned int frame_number;



		frame_number = DWC3_TRB_CTRL_GET_SID_SOFN(trb->ctrl);

		frame_number &= ~(dep->interval - 1);

		req->request.frame_number = frame_number;

	}



	/*

	 * If we're dealing with unaligned size OUT transfer, we will be left

	 * with one TRB pending in the ring. We need to manually clear HWO bit

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