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Commit 92d1635d authored by Vardan Mikayelyan's avatar Vardan Mikayelyan Committed by Felipe Balbi
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usb: dwc2: gadget: Add dwc2_gadget_incr_frame_num() 



Increases and checks targeted frame number of current ep
if overrun happened, sets flag and masks with DSTS_SOFFN_LIMIT

Added following fields to struct dwc2_hsotg_ep
-target_frame: Targeted frame num to setup next ISOC transfer
-frame_overrun: Indicates SOF number overrun in DSTS

Tested-by: default avatarJohn Keeping <john@metanate.com>
Signed-off-by: default avatarVardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 6b58cb07

drivers/usb/dwc2/core.h

+5 −0
Original line number Diff line number Diff line
@@ -177,6 +177,8 @@ struct dwc2_hsotg_req; 
 * @fifo_load: The amount of data loaded into the FIFO (periodic IN)

 * @last_load: The offset of data for the last start of request.

 * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN

 * @target_frame: Targeted frame num to setup next ISOC transfer

 * @frame_overrun: Indicates SOF number overrun in DSTS

 *

 * This is the driver's state for each registered enpoint, allowing it

 * to keep track of transactions that need doing. Each endpoint has a
@@ -214,6 +216,9 @@ struct dwc2_hsotg_ep { 
	unsigned int            isochronous:1;

	unsigned int            send_zlp:1;

	unsigned int            has_correct_parity:1;

	unsigned int            target_frame;

#define TARGET_FRAME_INITIAL   0xFFFFFFFF

	bool			frame_overrun;



	char                    name[10];

};

drivers/usb/dwc2/gadget.c

+19 −0
Original line number Diff line number Diff line
@@ -96,6 +96,25 @@ static inline bool using_dma(struct dwc2_hsotg *hsotg) 
	return hsotg->g_using_dma;

}



/**

 * dwc2_gadget_incr_frame_num - Increments the targeted frame number.

 * @hs_ep: The endpoint

 * @increment: The value to increment by

 *

 * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT.

 * If an overrun occurs it will wrap the value and set the frame_overrun flag.

 */

static inline void dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep)

{

	hs_ep->target_frame += hs_ep->interval;

	if (hs_ep->target_frame > DSTS_SOFFN_LIMIT) {

		hs_ep->frame_overrun = 1;

		hs_ep->target_frame &= DSTS_SOFFN_LIMIT;

	} else {

		hs_ep->frame_overrun = 0;

	}

}



/**

 * dwc2_hsotg_en_gsint - enable one or more of the general interrupt

 * @hsotg: The device state