/*
* Centralized txant update function. call it whenever wlc->stf->txant and/or wlc->stf->txchain
* change
*
* Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
* achieve various tx/rx antenna selection schemes
*
* legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means auto(last rx)
* for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 means last rx and
* do tx-antenna selection for SISO transmissions
* for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 means last rx and
* do tx-antenna selection for SISO transmissions
* for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 means both cores active
*/
static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc)
{
s8 txant;
txant = (s8) wlc->stf->txant;
ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1
|| txant == ANT_TX_LAST_RX);
if (WLC_PHY_11N_CAP(wlc->band)) {
if (txant == ANT_TX_FORCE_0) {
wlc->stf->phytxant = PHY_TXC_ANT_0;
} else if (txant == ANT_TX_FORCE_1) {
wlc->stf->phytxant = PHY_TXC_ANT_1;
if (WLCISNPHY(wlc->band) &&
NREV_GE(wlc->band->phyrev, 3)
&& NREV_LT(wlc->band->phyrev, 7)) {
wlc->stf->phytxant = PHY_TXC_ANT_2;
}
} else {
if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band))
wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
else {
/* keep this assert to catch out of sync wlc->stf->txcore */
ASSERT(wlc->stf->txchain > 0);
wlc->stf->phytxant =
wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
}
}
} else {
if (txant == ANT_TX_FORCE_0)
wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
else if (txant == ANT_TX_FORCE_1)
wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
else
wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
}
wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant);
}
/*
* Validate the chanspec for this locale, for 40MHZ we need to also check that the sidebands
* are valid 20MZH channels in this locale and they are also a legal HT combination
*/
static bool
wlc_valid_chanspec_ext(wlc_cm_info_t *wlc_cm, chanspec_t chspec, bool dualband)
{
struct wlc_info *wlc = wlc_cm->wlc;
u8 channel = CHSPEC_CHANNEL(chspec);
/* check the chanspec */
if (wf_chspec_malformed(chspec)) {
WL_ERROR("wl%d: malformed chanspec 0x%x\n",
wlc->pub->unit, chspec);
ASSERT(0);
return false;
}
if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
CHSPEC_WLCBANDUNIT(chspec))
return false;
/* Check a 20Mhz channel */
if (CHSPEC_IS20(chspec)) {
if (dualband)
return VALID_CHANNEL20_DB(wlc_cm->wlc, channel);
else
return VALID_CHANNEL20(wlc_cm->wlc, channel);
}
#ifdef SUPPORT_40MHZ
/* We know we are now checking a 40MHZ channel, so we should only be here
* for NPHYS
*/
if (WLCISNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band)) {
u8 upper_sideband = 0, idx;
u8 num_ch20_entries =
sizeof(chan20_info) / sizeof(struct chan20_info);
if (!VALID_40CHANSPEC_IN_BAND(wlc, CHSPEC_WLCBANDUNIT(chspec)))
return false;
if (dualband) {
if (!VALID_CHANNEL20_DB(wlc, LOWER_20_SB(channel)) ||
!VALID_CHANNEL20_DB(wlc, UPPER_20_SB(channel)))
return false;
} else {
if (!VALID_CHANNEL20(wlc, LOWER_20_SB(channel)) ||
!VALID_CHANNEL20(wlc, UPPER_20_SB(channel)))
return false;
}
/* find the lower sideband info in the sideband array */
for (idx = 0; idx < num_ch20_entries; idx++) {
if (chan20_info[idx].sb == LOWER_20_SB(channel))
upper_sideband = chan20_info[idx].adj_sbs;
}
/* check that the lower sideband allows an upper sideband */
if ((upper_sideband & (CH_UPPER_SB | CH_EWA_VALID)) ==
(CH_UPPER_SB | CH_EWA_VALID))
return true;
return false;
}
#endif /* 40 MHZ */
return false;
}
