/*
* 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];
/* 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 (%d) < expected (%d)!\n",
__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\n", __func__, rs[0], rs[1]);
// DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR, "%s (p=%p):\n", __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);
}
static void
radar_summary_print(struct ath_dfs *dfs, struct rx_radar_status *rsu)
{
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" pulsedur=%d\n", rsu->pulse_duration);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" rssi=%d\n", rsu->rssi);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" ischirp=%d\n", rsu->is_chirp);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" sidx=%d\n", rsu->sidx);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" raw tsf=%d\n", rsu->raw_tsf);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" tsf_offset=%d\n", rsu->tsf_offset);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" cooked tsf=%d\n", rsu->raw_tsf - rsu->tsf_offset);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" frequency offset=%d.%d MHz (oversampling=%d)\n",
(int) (rsu->freq_offset / 1000),
(int) abs(rsu->freq_offset % 1000),
PERE_IS_OVERSAMPLING(dfs));
}
/*
* Calculate the centre frequency and low/high range for a radar pulse event.
*
* XXX TODO: Handle half/quarter rates correctly!
* XXX TODO: handle VHT160 correctly!
* XXX TODO: handle VHT80+80 correctly!
*/
static int
tlv_calc_event_freq_pulse(struct ath_dfs *dfs, struct rx_radar_status *rs,
uint32_t *freq_centre, uint32_t *freq_lo, uint32_t *freq_hi)
{
int chan_width;
int chan_centre;
/* Fetch the channel centre frequency in MHz */
chan_centre = tlv_calc_freq_info(dfs, rs);
/* Convert to KHz */
chan_centre *= 1000;
/*
* XXX hard-code event width to be 2 * bin size for now;
* XXX this needs to take into account the core clock speed
* XXX for half/quarter rate mode.
*/
if (PERE_IS_OVERSAMPLING(dfs))
chan_width = (44000 * 2 / 128);
else
chan_width = (40000 * 2 / 128);
/* XXX adjust chan_width for half/quarter rate! */
/*
* Now we can do the math to figure out the correct channel range.
*/
(*freq_centre) = (uint32_t) (chan_centre + rs->freq_offset);
(*freq_lo) = (uint32_t) ((chan_centre + rs->freq_offset)
- chan_width);
(*freq_hi) = (uint32_t) ((chan_centre + rs->freq_offset)
+ chan_width);
return (1);
}
/*
* The chirp bandwidth in KHz is defined as:
*
* totalBW(KHz) = delta_peak(mean)
* * [ (bin resolution in KHz) / (radar_fft_long_period in uS) ]
* * pulse_duration (us)
*
* The bin resolution depends upon oversampling.
*
* For now, we treat the radar_fft_long_period as a hard-coded 8uS.
*/
static int
tlv_calc_event_freq_chirp(struct ath_dfs *dfs, struct rx_radar_status *rs,
uint32_t *freq_centre, uint32_t *freq_lo, uint32_t *freq_hi)
{
int32_t bin_resolution; /* KHz * 100 */
int32_t radar_fft_long_period = 8; /* microseconds */
int32_t delta_peak;
int32_t pulse_duration;
int32_t total_bw;
int32_t chan_centre;
int32_t freq_1, freq_2;
/*
* KHz isn't enough resolution here!
* So treat it as deci-hertz (10Hz) and convert back to KHz
* later.
*/
if (PERE_IS_OVERSAMPLING(dfs))
bin_resolution = (44000 * 100) / 128;
else
bin_resolution = (40000 * 100) / 128;
delta_peak = rs->delta_peak;
pulse_duration = rs->pulse_duration;
total_bw = delta_peak * (bin_resolution / radar_fft_long_period) *
pulse_duration;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR | ATH_DEBUG_DFS_PHYERR_SUM,
"%s: delta_peak=%d, pulse_duration=%d, bin_resolution=%d.%dKHz, "
"radar_fft_long_period=%d, total_bw=%d.%dKHz\n",
__func__,
delta_peak,
pulse_duration,
bin_resolution / 1000,
bin_resolution % 1000,
radar_fft_long_period,
total_bw / 100,
abs(total_bw % 100));
total_bw /= 100; /* back to KHz */
/* Grab the channel centre frequency in MHz */
chan_centre = tlv_calc_freq_info(dfs, rs);
/* Early abort! */
if (chan_centre == 0) {
(*freq_centre) = 0;
return (0);
}
/* Convert to KHz */
chan_centre *= 1000;
/*
* sidx is the starting frequency; total_bw is a signed value and
* for negative chirps (ie, moving down in frequency rather than up)
* the end frequency may be less than the start frequency.
*/
if (total_bw > 0) {
freq_1 = chan_centre + rs->freq_offset;
freq_2 = chan_centre + rs->freq_offset + total_bw;
} else {
freq_1 = chan_centre + rs->freq_offset + total_bw;
freq_2 = chan_centre + rs->freq_offset;
}
(*freq_lo) = (uint32_t)(freq_1);
(*freq_hi) = (uint32_t)(freq_2);
(*freq_centre) = (uint32_t) (freq_1 + (abs(total_bw) / 2));
return (1);
}
/*
* 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;
}
}
