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Provide a NDIS tx power level converstion to/from net80211, this uses a loookup

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table to approximate mW<->dBM.

Submitted by:	Paul B. Mahol
This commit is contained in:
thompsa 2009-01-12 17:15:09 +00:00
parent d559dffeaf
commit fc7deb78dc
1 changed files with 30 additions and 1 deletions

31
sys/dev/if_ndis/if_ndis.c

@ -101,6 +101,17 @@ int ndisusb_halt = 1;
SYSCTL_INT(_hw_ndisusb, OID_AUTO, halt, CTLFLAG_RW, &ndisusb_halt, 0,
"Halt NDIS USB driver when it's attached");
/* 0 - 30 dBm to mW conversion table */
const uint16_t dBm2mW[] = {
1, 1, 1, 1, 2, 2, 2, 2, 3, 3,
3, 4, 4, 4, 5, 6, 6, 7, 8, 9,
10, 11, 13, 14, 16, 18, 20, 22, 25, 28,
32, 35, 40, 45, 50, 56, 63, 71, 79, 89,
100, 112, 126, 141, 158, 178, 200, 224, 251, 282,
316, 355, 398, 447, 501, 562, 631, 708, 794, 891,
1000
};
MODULE_DEPEND(ndis, ether, 1, 1, 1);
MODULE_DEPEND(ndis, wlan, 1, 1, 1);
MODULE_DEPEND(ndis, ndisapi, 1, 1, 1);
@ -739,7 +750,7 @@ ndis_attach(dev)
ic->ic_ifp = ifp;
ic->ic_opmode = IEEE80211_M_STA;
ic->ic_phytype = IEEE80211_T_DS;
ic->ic_caps = IEEE80211_C_STA | IEEE80211_C_IBSS;
ic->ic_caps = IEEE80211_C_STA | IEEE80211_C_IBSS | IEEE80211_C_TXPMGT;
setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
len = 0;
r = ndis_get_info(sc, OID_802_11_NETWORK_TYPES_SUPPORTED,
@ -2312,6 +2323,13 @@ ndis_setstate_80211(sc)
arg = NDIS_80211_POWERMODE_CAM;
ndis_set_info(sc, OID_802_11_POWER_MODE, &arg, &len);
/* Set TX power */
if (ic->ic_txpowlimit < sizeof(dBm2mW)) {
len = sizeof(arg);
arg = dBm2mW[ic->ic_txpowlimit];
ndis_set_info(sc, OID_802_11_TX_POWER_LEVEL, &arg, &len);
}
/*
* Default encryption mode to off, authentication
* to open and privacy to 'accept everything.'
@ -2778,6 +2796,17 @@ ndis_getstate_80211(sc)
ic->ic_flags |= IEEE80211_F_PMGTON;
}
/* Get TX power */
len = sizeof(arg);
rval = ndis_get_info(sc, OID_802_11_TX_POWER_LEVEL, &arg, &len);
if (!rval) {
for (i = 0; i < sizeof(dBm2mW); i++)
if (dBm2mW[i] >= arg)
break;
ic->ic_txpowlimit = i;
}
/*
* Use the current association information to reflect
* what channel we're on.