544 lines
15 KiB
C
544 lines
15 KiB
C
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/*
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* Copyright (c) 2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/relay.h>
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#include "ath9k.h"
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static s8 fix_rssi_inv_only(u8 rssi_val)
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{
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if (rssi_val == 128)
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rssi_val = 0;
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return (s8) rssi_val;
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}
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static void ath_debug_send_fft_sample(struct ath_softc *sc,
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struct fft_sample_tlv *fft_sample_tlv)
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{
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int length;
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if (!sc->rfs_chan_spec_scan)
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return;
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length = __be16_to_cpu(fft_sample_tlv->length) +
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sizeof(*fft_sample_tlv);
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relay_write(sc->rfs_chan_spec_scan, fft_sample_tlv, length);
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}
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/* returns 1 if this was a spectral frame, even if not handled. */
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int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
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struct ath_rx_status *rs, u64 tsf)
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{
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struct ath_hw *ah = sc->sc_ah;
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u8 num_bins, *bins, *vdata = (u8 *)hdr;
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struct fft_sample_ht20 fft_sample_20;
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struct fft_sample_ht20_40 fft_sample_40;
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struct fft_sample_tlv *tlv;
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struct ath_radar_info *radar_info;
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int len = rs->rs_datalen;
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int dc_pos;
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u16 fft_len, length, freq = ah->curchan->chan->center_freq;
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enum nl80211_channel_type chan_type;
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/* AR9280 and before report via ATH9K_PHYERR_RADAR, AR93xx and newer
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* via ATH9K_PHYERR_SPECTRAL. Haven't seen ATH9K_PHYERR_FALSE_RADAR_EXT
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* yet, but this is supposed to be possible as well.
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*/
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if (rs->rs_phyerr != ATH9K_PHYERR_RADAR &&
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rs->rs_phyerr != ATH9K_PHYERR_FALSE_RADAR_EXT &&
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rs->rs_phyerr != ATH9K_PHYERR_SPECTRAL)
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return 0;
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/* check if spectral scan bit is set. This does not have to be checked
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* if received through a SPECTRAL phy error, but shouldn't hurt.
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*/
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radar_info = ((struct ath_radar_info *)&vdata[len]) - 1;
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if (!(radar_info->pulse_bw_info & SPECTRAL_SCAN_BITMASK))
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return 0;
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chan_type = cfg80211_get_chandef_type(&sc->hw->conf.chandef);
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if ((chan_type == NL80211_CHAN_HT40MINUS) ||
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(chan_type == NL80211_CHAN_HT40PLUS)) {
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fft_len = SPECTRAL_HT20_40_TOTAL_DATA_LEN;
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num_bins = SPECTRAL_HT20_40_NUM_BINS;
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bins = (u8 *)fft_sample_40.data;
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} else {
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fft_len = SPECTRAL_HT20_TOTAL_DATA_LEN;
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num_bins = SPECTRAL_HT20_NUM_BINS;
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bins = (u8 *)fft_sample_20.data;
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}
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/* Variation in the data length is possible and will be fixed later */
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if ((len > fft_len + 2) || (len < fft_len - 1))
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return 1;
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switch (len - fft_len) {
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case 0:
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/* length correct, nothing to do. */
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memcpy(bins, vdata, num_bins);
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break;
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case -1:
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/* first byte missing, duplicate it. */
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memcpy(&bins[1], vdata, num_bins - 1);
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bins[0] = vdata[0];
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break;
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case 2:
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/* MAC added 2 extra bytes at bin 30 and 32, remove them. */
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memcpy(bins, vdata, 30);
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bins[30] = vdata[31];
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memcpy(&bins[31], &vdata[33], num_bins - 31);
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break;
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case 1:
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/* MAC added 2 extra bytes AND first byte is missing. */
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bins[0] = vdata[0];
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memcpy(&bins[1], vdata, 30);
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bins[31] = vdata[31];
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memcpy(&bins[32], &vdata[33], num_bins - 32);
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break;
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default:
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return 1;
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}
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/* DC value (value in the middle) is the blind spot of the spectral
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* sample and invalid, interpolate it.
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*/
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dc_pos = num_bins / 2;
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bins[dc_pos] = (bins[dc_pos + 1] + bins[dc_pos - 1]) / 2;
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if ((chan_type == NL80211_CHAN_HT40MINUS) ||
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(chan_type == NL80211_CHAN_HT40PLUS)) {
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s8 lower_rssi, upper_rssi;
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s16 ext_nf;
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u8 lower_max_index, upper_max_index;
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u8 lower_bitmap_w, upper_bitmap_w;
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u16 lower_mag, upper_mag;
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struct ath9k_hw_cal_data *caldata = ah->caldata;
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struct ath_ht20_40_mag_info *mag_info;
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if (caldata)
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ext_nf = ath9k_hw_getchan_noise(ah, ah->curchan,
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caldata->nfCalHist[3].privNF);
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else
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ext_nf = ATH_DEFAULT_NOISE_FLOOR;
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length = sizeof(fft_sample_40) - sizeof(struct fft_sample_tlv);
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fft_sample_40.tlv.type = ATH_FFT_SAMPLE_HT20_40;
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fft_sample_40.tlv.length = __cpu_to_be16(length);
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fft_sample_40.freq = __cpu_to_be16(freq);
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fft_sample_40.channel_type = chan_type;
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if (chan_type == NL80211_CHAN_HT40PLUS) {
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lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
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upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
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fft_sample_40.lower_noise = ah->noise;
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fft_sample_40.upper_noise = ext_nf;
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} else {
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lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]);
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upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
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fft_sample_40.lower_noise = ext_nf;
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fft_sample_40.upper_noise = ah->noise;
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}
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fft_sample_40.lower_rssi = lower_rssi;
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fft_sample_40.upper_rssi = upper_rssi;
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mag_info = ((struct ath_ht20_40_mag_info *)radar_info) - 1;
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lower_mag = spectral_max_magnitude(mag_info->lower_bins);
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upper_mag = spectral_max_magnitude(mag_info->upper_bins);
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fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag);
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fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag);
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lower_max_index = spectral_max_index(mag_info->lower_bins);
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upper_max_index = spectral_max_index(mag_info->upper_bins);
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fft_sample_40.lower_max_index = lower_max_index;
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fft_sample_40.upper_max_index = upper_max_index;
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lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins);
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upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins);
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fft_sample_40.lower_bitmap_weight = lower_bitmap_w;
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fft_sample_40.upper_bitmap_weight = upper_bitmap_w;
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fft_sample_40.max_exp = mag_info->max_exp & 0xf;
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fft_sample_40.tsf = __cpu_to_be64(tsf);
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tlv = (struct fft_sample_tlv *)&fft_sample_40;
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} else {
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u8 max_index, bitmap_w;
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u16 magnitude;
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struct ath_ht20_mag_info *mag_info;
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length = sizeof(fft_sample_20) - sizeof(struct fft_sample_tlv);
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fft_sample_20.tlv.type = ATH_FFT_SAMPLE_HT20;
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fft_sample_20.tlv.length = __cpu_to_be16(length);
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fft_sample_20.freq = __cpu_to_be16(freq);
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fft_sample_20.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]);
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fft_sample_20.noise = ah->noise;
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mag_info = ((struct ath_ht20_mag_info *)radar_info) - 1;
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magnitude = spectral_max_magnitude(mag_info->all_bins);
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fft_sample_20.max_magnitude = __cpu_to_be16(magnitude);
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max_index = spectral_max_index(mag_info->all_bins);
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fft_sample_20.max_index = max_index;
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bitmap_w = spectral_bitmap_weight(mag_info->all_bins);
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fft_sample_20.bitmap_weight = bitmap_w;
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fft_sample_20.max_exp = mag_info->max_exp & 0xf;
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fft_sample_20.tsf = __cpu_to_be64(tsf);
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tlv = (struct fft_sample_tlv *)&fft_sample_20;
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}
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ath_debug_send_fft_sample(sc, tlv);
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return 1;
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}
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/*********************/
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/* spectral_scan_ctl */
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/*********************/
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static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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char *mode = "";
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unsigned int len;
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switch (sc->spectral_mode) {
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case SPECTRAL_DISABLED:
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mode = "disable";
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break;
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case SPECTRAL_BACKGROUND:
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mode = "background";
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break;
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case SPECTRAL_CHANSCAN:
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mode = "chanscan";
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break;
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case SPECTRAL_MANUAL:
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mode = "manual";
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break;
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}
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len = strlen(mode);
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return simple_read_from_buffer(user_buf, count, ppos, mode, len);
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}
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static ssize_t write_file_spec_scan_ctl(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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char buf[32];
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ssize_t len;
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if (config_enabled(CONFIG_ATH9K_TX99))
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return -EOPNOTSUPP;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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if (strncmp("trigger", buf, 7) == 0) {
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ath9k_spectral_scan_trigger(sc->hw);
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} else if (strncmp("background", buf, 10) == 0) {
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ath9k_spectral_scan_config(sc->hw, SPECTRAL_BACKGROUND);
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ath_dbg(common, CONFIG, "spectral scan: background mode enabled\n");
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} else if (strncmp("chanscan", buf, 8) == 0) {
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ath9k_spectral_scan_config(sc->hw, SPECTRAL_CHANSCAN);
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ath_dbg(common, CONFIG, "spectral scan: channel scan mode enabled\n");
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} else if (strncmp("manual", buf, 6) == 0) {
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ath9k_spectral_scan_config(sc->hw, SPECTRAL_MANUAL);
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ath_dbg(common, CONFIG, "spectral scan: manual mode enabled\n");
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} else if (strncmp("disable", buf, 7) == 0) {
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ath9k_spectral_scan_config(sc->hw, SPECTRAL_DISABLED);
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ath_dbg(common, CONFIG, "spectral scan: disabled\n");
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} else {
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return -EINVAL;
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}
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return count;
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}
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static const struct file_operations fops_spec_scan_ctl = {
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.read = read_file_spec_scan_ctl,
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.write = write_file_spec_scan_ctl,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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/*************************/
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/* spectral_short_repeat */
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/*************************/
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static ssize_t read_file_spectral_short_repeat(struct file *file,
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char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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char buf[32];
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unsigned int len;
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len = sprintf(buf, "%d\n", sc->spec_config.short_repeat);
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return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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}
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static ssize_t write_file_spectral_short_repeat(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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unsigned long val;
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char buf[32];
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ssize_t len;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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if (kstrtoul(buf, 0, &val))
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return -EINVAL;
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if (val > 1)
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return -EINVAL;
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sc->spec_config.short_repeat = val;
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return count;
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}
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static const struct file_operations fops_spectral_short_repeat = {
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.read = read_file_spectral_short_repeat,
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.write = write_file_spectral_short_repeat,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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/******************/
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/* spectral_count */
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/******************/
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static ssize_t read_file_spectral_count(struct file *file,
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char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
char buf[32];
|
||
|
|
unsigned int len;
|
||
|
|
|
||
|
|
len = sprintf(buf, "%d\n", sc->spec_config.count);
|
||
|
|
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t write_file_spectral_count(struct file *file,
|
||
|
|
const char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
unsigned long val;
|
||
|
|
char buf[32];
|
||
|
|
ssize_t len;
|
||
|
|
|
||
|
|
len = min(count, sizeof(buf) - 1);
|
||
|
|
if (copy_from_user(buf, user_buf, len))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
buf[len] = '\0';
|
||
|
|
if (kstrtoul(buf, 0, &val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val > 255)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sc->spec_config.count = val;
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spectral_count = {
|
||
|
|
.read = read_file_spectral_count,
|
||
|
|
.write = write_file_spectral_count,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*******************/
|
||
|
|
/* spectral_period */
|
||
|
|
/*******************/
|
||
|
|
|
||
|
|
static ssize_t read_file_spectral_period(struct file *file,
|
||
|
|
char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
char buf[32];
|
||
|
|
unsigned int len;
|
||
|
|
|
||
|
|
len = sprintf(buf, "%d\n", sc->spec_config.period);
|
||
|
|
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t write_file_spectral_period(struct file *file,
|
||
|
|
const char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
unsigned long val;
|
||
|
|
char buf[32];
|
||
|
|
ssize_t len;
|
||
|
|
|
||
|
|
len = min(count, sizeof(buf) - 1);
|
||
|
|
if (copy_from_user(buf, user_buf, len))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
buf[len] = '\0';
|
||
|
|
if (kstrtoul(buf, 0, &val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val > 255)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sc->spec_config.period = val;
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spectral_period = {
|
||
|
|
.read = read_file_spectral_period,
|
||
|
|
.write = write_file_spectral_period,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
/***********************/
|
||
|
|
/* spectral_fft_period */
|
||
|
|
/***********************/
|
||
|
|
|
||
|
|
static ssize_t read_file_spectral_fft_period(struct file *file,
|
||
|
|
char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
char buf[32];
|
||
|
|
unsigned int len;
|
||
|
|
|
||
|
|
len = sprintf(buf, "%d\n", sc->spec_config.fft_period);
|
||
|
|
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t write_file_spectral_fft_period(struct file *file,
|
||
|
|
const char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath_softc *sc = file->private_data;
|
||
|
|
unsigned long val;
|
||
|
|
char buf[32];
|
||
|
|
ssize_t len;
|
||
|
|
|
||
|
|
len = min(count, sizeof(buf) - 1);
|
||
|
|
if (copy_from_user(buf, user_buf, len))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
buf[len] = '\0';
|
||
|
|
if (kstrtoul(buf, 0, &val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val > 15)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sc->spec_config.fft_period = val;
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spectral_fft_period = {
|
||
|
|
.read = read_file_spectral_fft_period,
|
||
|
|
.write = write_file_spectral_fft_period,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*******************/
|
||
|
|
/* Relay interface */
|
||
|
|
/*******************/
|
||
|
|
|
||
|
|
static struct dentry *create_buf_file_handler(const char *filename,
|
||
|
|
struct dentry *parent,
|
||
|
|
umode_t mode,
|
||
|
|
struct rchan_buf *buf,
|
||
|
|
int *is_global)
|
||
|
|
{
|
||
|
|
struct dentry *buf_file;
|
||
|
|
|
||
|
|
buf_file = debugfs_create_file(filename, mode, parent, buf,
|
||
|
|
&relay_file_operations);
|
||
|
|
*is_global = 1;
|
||
|
|
return buf_file;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int remove_buf_file_handler(struct dentry *dentry)
|
||
|
|
{
|
||
|
|
debugfs_remove(dentry);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct rchan_callbacks rfs_spec_scan_cb = {
|
||
|
|
.create_buf_file = create_buf_file_handler,
|
||
|
|
.remove_buf_file = remove_buf_file_handler,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*********************/
|
||
|
|
/* Debug Init/Deinit */
|
||
|
|
/*********************/
|
||
|
|
|
||
|
|
void ath9k_spectral_deinit_debug(struct ath_softc *sc)
|
||
|
|
{
|
||
|
|
if (config_enabled(CONFIG_ATH9K_DEBUGFS) && sc->rfs_chan_spec_scan) {
|
||
|
|
relay_close(sc->rfs_chan_spec_scan);
|
||
|
|
sc->rfs_chan_spec_scan = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ath9k_spectral_init_debug(struct ath_softc *sc)
|
||
|
|
{
|
||
|
|
sc->rfs_chan_spec_scan = relay_open("spectral_scan",
|
||
|
|
sc->debug.debugfs_phy,
|
||
|
|
1024, 256, &rfs_spec_scan_cb,
|
||
|
|
NULL);
|
||
|
|
debugfs_create_file("spectral_scan_ctl",
|
||
|
|
S_IRUSR | S_IWUSR,
|
||
|
|
sc->debug.debugfs_phy, sc,
|
||
|
|
&fops_spec_scan_ctl);
|
||
|
|
debugfs_create_file("spectral_short_repeat",
|
||
|
|
S_IRUSR | S_IWUSR,
|
||
|
|
sc->debug.debugfs_phy, sc,
|
||
|
|
&fops_spectral_short_repeat);
|
||
|
|
debugfs_create_file("spectral_count",
|
||
|
|
S_IRUSR | S_IWUSR,
|
||
|
|
sc->debug.debugfs_phy, sc,
|
||
|
|
&fops_spectral_count);
|
||
|
|
debugfs_create_file("spectral_period",
|
||
|
|
S_IRUSR | S_IWUSR,
|
||
|
|
sc->debug.debugfs_phy, sc,
|
||
|
|
&fops_spectral_period);
|
||
|
|
debugfs_create_file("spectral_fft_period",
|
||
|
|
S_IRUSR | S_IWUSR,
|
||
|
|
sc->debug.debugfs_phy, sc,
|
||
|
|
&fops_spectral_fft_period);
|
||
|
|
}
|