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Commit b9392d99 authored by Gregory Herrero's avatar Gregory Herrero Committed by Felipe Balbi
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usb: dwc2: host: add function to compare frame index 



This function allow comparing frame index used for
descriptor list which has 64 entries.

Acked-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarGregory Herrero <gregory.herrero@intel.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 2b046bc5

drivers/usb/dwc2/hcd.h

+13 −0
Original line number Diff line number Diff line
@@ -534,6 +534,19 @@ static inline bool dbg_perio(void) { return false; } 
/* Packet size for any kind of endpoint descriptor */

#define dwc2_max_packet(wmaxpacketsize) ((wmaxpacketsize) & 0x07ff)



/*

 * Returns true if frame1 index is greater than frame2 index. The comparison

 * is done modulo FRLISTEN_64_SIZE. This accounts for the rollover of the

 * frame number when the max index frame number is reached.

 */

static inline bool dwc2_frame_idx_num_gt(u16 fr_idx1, u16 fr_idx2)

{

	u16 diff = fr_idx1 - fr_idx2;

	u16 sign = diff & (FRLISTEN_64_SIZE >> 1);



	return diff && !sign;

}



/*

 * Returns true if frame1 is less than or equal to frame2. The comparison is

 * done modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the