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[bwn] correctly calculate RSSI level.

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Tested:

* BCM4311, PHY-G, STA mode
* BCM4312, PHY-LP, STA mode
* BCM4321, PHY-N, STA moe
This commit is contained in:
Adrian Chadd 2016-05-17 21:24:10 +00:00
parent da019dfdd5
commit 3095d9fbc6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=300079
1 changed files with 12 additions and 0 deletions
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12
sys/dev/bwn/if_bwn.c
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@ -5770,13 +5770,25 @@ bwn_rxeof(struct bwn_mac *mac, struct mbuf *m, const void *_rxhdr)
rssi = max(rxhdr->phy.n.power1, rxhdr->ps2.n.power2);
else
rssi = max(rxhdr->phy.n.power0, rxhdr->phy.n.power1);
#if 0
DPRINTF(mac->mac_sc, BWN_DEBUG_RECV,
"%s: power0=%d, power1=%d, power2=%d\n",
__func__,
rxhdr->phy.n.power0,
rxhdr->phy.n.power1,
rxhdr->ps2.n.power2);
#endif
break;
default:
/* XXX TODO: implement rssi for other PHYs */
break;
}
/*
* RSSI here is absolute, not relative to the noise floor.
*/
noise = mac->mac_stats.link_noise;
rssi = rssi - noise;
/* RX radio tap */
if (ieee80211_radiotap_active(ic))