/*
* Return the centre frequency for the current operating channel and
* event.
*
* This is for post-Owl 11n chips which report pri/extension channel
* events.
*/
static inline uint16_t
dfs_get_event_freqcentre(struct ath_dfs *dfs, int is_pri, int is_ext, int is_dc)
{
struct ieee80211com *ic;
int chan_offset = 0, chan_width;
/* Handle edge cases during startup/transition, shouldn't happen! */
if (dfs == NULL)
return (0);
if (dfs->ic == NULL || dfs->ic->ic_curchan == NULL)
return (0);
ic = dfs->ic;
/*
*
* For wide channels, DC and ext frequencies need a bit of hand-holding
* based on whether it's an upper or lower channel.
*/
chan_width = dfs_get_event_freqwidth(dfs);
if (IEEE80211_IS_CHAN_11N_HT40PLUS(ic->ic_curchan))
chan_offset = chan_width;
else if (IEEE80211_IS_CHAN_11N_HT40MINUS(ic->ic_curchan))
chan_offset = -chan_width;
else
chan_offset = 0;
/*
* Check for DC events first - the sowl code may just set all
* the bits together..
*/
if (is_dc) {
/*
* XXX TODO: Should DC events be considered 40MHz wide here?
*/
return (ieee80211_chan2freq(ic, ic->ic_curchan) +
(chan_offset / 2));
}
/*
* For non-wide channels, the centre frequency is just ic_freq.
* The centre frequency for pri events is still ic_freq.
*/
if (is_pri) {
return (ieee80211_chan2freq(ic, ic->ic_curchan));
}
if (is_ext) {
return (ieee80211_chan2freq(ic, ic->ic_curchan) + chan_width);
}
/* XXX shouldn't get here */
return (ieee80211_chan2freq(ic, ic->ic_curchan));
}
/*
* Calculate the channel centre in MHz.
*/
static int
tlv_calc_freq_info(struct ath_dfs *dfs, struct rx_radar_status *rs)
{
uint32_t chan_centre;
uint32_t chan_width;
int chan_offset;
/*
* For now, just handle up to VHT80 correctly.
*/
if (dfs->ic == NULL || dfs->ic->ic_curchan == NULL) {
DFS_PRINTK("%s: dfs->ic=%p, that or curchan is null?\n",
__func__, dfs->ic);
return (0);
/*
* For now, the only 11ac channel with freq1/freq2 setup is
* VHT80.
*
* XXX should have a flag macro to check this!
*/
} else if (IEEE80211_IS_CHAN_11AC_VHT80(dfs->ic->ic_curchan)) {
/* 11AC, so cfreq1/cfreq2 are setup */
/*
* XXX if it's 80+80 this won't work - need to use seg
* appropriately!
*/
chan_centre = dfs->ic->ic_ieee2mhz(
dfs->ic->ic_curchan->ic_vhtop_ch_freq_seg1,
dfs->ic->ic_curchan->ic_flags);
} else {
/* HT20/HT40 */
/*
* XXX this is hard-coded - it should be 5 or 10 for
* half/quarter appropriately.
*/
chan_width = 20;
/* Grab default channel centre */
chan_centre = ieee80211_chan2freq(dfs->ic,
dfs->ic->ic_curchan);
/* Calculate offset based on HT40U/HT40D and VHT40U/VHT40D */
if (IEEE80211_IS_CHAN_11N_HT40PLUS(dfs->ic->ic_curchan) ||
dfs->ic->ic_curchan->ic_flags & IEEE80211_CHAN_VHT40PLUS)
chan_offset = chan_width;
else if (IEEE80211_IS_CHAN_11N_HT40MINUS(dfs->ic->ic_curchan) ||
dfs->ic->ic_curchan->ic_flags & IEEE80211_CHAN_VHT40MINUS)
chan_offset = -chan_width;
else
chan_offset = 0;
/* Calculate new _real_ channel centre */
chan_centre += (chan_offset / 2);
}
/*
* XXX half/quarter rate support!
*/
/* Return ev_chan_centre in MHz */
return (chan_centre);
}
