/*
* 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);
}
/*
* Parse the radar summary frame.
*
* The frame contents _minus_ the TLV are passed in.
*/
static void
radar_summary_parse(struct ath_dfs *dfs, const char *buf, size_t len,
struct rx_radar_status *rsu)
{
uint32_t rs[2];
int freq_centre, freq;
/* Drop out if we have < 2 DWORDs available */
if (len < sizeof(rs)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR |
ATH_DEBUG_DFS_PHYERR_SUM,
"%s: len (%zu) < expected (%zu)!",
__func__,
len,
sizeof(rs));
}
/*
* Since the TLVs may be unaligned for some reason
* we take a private copy into aligned memory.
* This enables us to use the HAL-like accessor macros
* into the DWORDs to access sub-DWORD fields.
*/
OS_MEMCPY(rs, buf, sizeof(rs));
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: two 32 bit values are: %08x %08x", __func__, rs[0], rs[1]);
// DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR, "%s (p=%p):", __func__, buf);
/* Populate the fields from the summary report */
rsu->tsf_offset =
MS(rs[RADAR_REPORT_PULSE_REG_2], RADAR_REPORT_PULSE_TSF_OFFSET);
rsu->pulse_duration =
MS(rs[RADAR_REPORT_PULSE_REG_2], RADAR_REPORT_PULSE_DUR);
rsu->is_chirp =
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_IS_CHIRP);
rsu->sidx = sign_extend_32(
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_SIDX),
10);
rsu->freq_offset =
calc_freq_offset(rsu->sidx, PERE_IS_OVERSAMPLING(dfs));
/* These are only relevant if the pulse is a chirp */
rsu->delta_peak = sign_extend_32(
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_DELTA_PEAK),
6);
rsu->delta_diff =
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_DELTA_DIFF);
/* WAR for FCC Type 4*/
/*
* HW is giving longer pulse duration (in case of VHT80, with traffic)
* which fails to detect FCC type4 radar pulses. Added a work around to
* fix the pulse duration and duration delta.
*
* IF VHT80
* && (primary_channel==30MHz || primary_channel== -30MHz)
* && -4 <= pulse_index <= 4
* && !chirp
* && pulse duration > 20 us
* THEN
* Set pulse duration to 20 us
*/
freq = ieee80211_chan2freq(dfs->ic, dfs->ic->ic_curchan);
freq_centre = dfs->ic->ic_curchan->ic_vhtop_ch_freq_seg1;
if ((IEEE80211_IS_CHAN_11AC_VHT80(dfs->ic->ic_curchan) &&
(abs(freq - freq_centre) == 30) &&
!rsu->is_chirp &&
abs(rsu->sidx) <= 4 &&
rsu->pulse_duration > 20)){
rsu->pulse_duration = 20;
}
}