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33 #ifndef __IF_ATH_TSF_H__
34 #define __IF_ATH_TSF_H__
37 * Extend 15-bit time stamp from rx descriptor to
38 * a full 64-bit TSF using the specified TSF.
40 static __inline u_int64_t
41 ath_extend_tsf15(u_int32_t rstamp, u_int64_t tsf)
43 if ((tsf & 0x7fff) < rstamp)
46 return ((tsf &~ 0x7fff) | rstamp);
50 * Extend 32-bit time stamp from rx descriptor to
51 * a full 64-bit TSF using the specified TSF.
53 static __inline u_int64_t
54 ath_extend_tsf32(u_int32_t rstamp, u_int64_t tsf)
56 u_int32_t tsf_low = tsf & 0xffffffff;
57 u_int64_t tsf64 = (tsf & ~0xffffffffULL) | rstamp;
59 if (rstamp > tsf_low && (rstamp - tsf_low > 0x10000000))
60 tsf64 -= 0x100000000ULL;
62 if (rstamp < tsf_low && (tsf_low - rstamp > 0x10000000))
63 tsf64 += 0x100000000ULL;
69 * Extend the TSF from the RX descriptor to a full 64 bit TSF.
70 * Earlier hardware versions only wrote the low 15 bits of the
71 * TSF into the RX descriptor; later versions (AR5416 and up)
72 * include the 32 bit TSF value.
74 static __inline u_int64_t
75 ath_extend_tsf(struct ath_softc *sc, u_int32_t rstamp, u_int64_t tsf)
78 return ath_extend_tsf32(rstamp, tsf);
80 return ath_extend_tsf15(rstamp, tsf);