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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <linux/relay.h> #include <linux/random.h> #include "ath9k.h" static s8 fix_rssi_inv_only(u8 rssi_val) { if (rssi_val == 128) rssi_val = 0; return (s8) rssi_val; } static void ath_debug_send_fft_sample(struct ath_spec_scan_priv *spec_priv, struct fft_sample_tlv *fft_sample_tlv) { int length; if (!spec_priv->rfs_chan_spec_scan) return; length = __be16_to_cpu(fft_sample_tlv->length) + sizeof(*fft_sample_tlv); relay_write(spec_priv->rfs_chan_spec_scan, fft_sample_tlv, length); } typedef int (ath_cmn_fft_idx_validator) (u8 *sample_end, int bytes_read); static int ath_cmn_max_idx_verify_ht20_fft(u8 *sample_end, int bytes_read) { struct ath_ht20_mag_info *mag_info; u8 *sample; u16 max_magnitude; u8 max_index; u8 max_exp; /* Sanity check so that we don't read outside the read * buffer */ if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN - 1) return -1; mag_info = (struct ath_ht20_mag_info *) (sample_end - sizeof(struct ath_ht20_mag_info) + 1); sample = sample_end - SPECTRAL_HT20_SAMPLE_LEN + 1; max_index = spectral_max_index_ht20(mag_info->all_bins); max_magnitude = spectral_max_magnitude(mag_info->all_bins); max_exp = mag_info->max_exp & 0xf; /* Don't try to read something outside the read buffer * in case of a missing byte (so bins[0] will be outside * the read buffer) */ if (bytes_read < SPECTRAL_HT20_SAMPLE_LEN && max_index < 1) return -1; if ((sample[max_index] & 0xf8) != ((max_magnitude >> max_exp) & 0xf8)) return -1; else return 0; } static int ath_cmn_max_idx_verify_ht20_40_fft(u8 *sample_end, int bytes_read) { struct ath_ht20_40_mag_info *mag_info; u8 *sample; u16 lower_mag, upper_mag; u8 lower_max_index, upper_max_index; u8 max_exp; int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2; /* Sanity check so that we don't read outside the read * buffer */ if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN - 1) return -1; mag_info = (struct ath_ht20_40_mag_info *) (sample_end - sizeof(struct ath_ht20_40_mag_info) + 1); sample = sample_end - SPECTRAL_HT20_40_SAMPLE_LEN + 1; lower_mag = spectral_max_magnitude(mag_info->lower_bins); lower_max_index = spectral_max_index_ht40(mag_info->lower_bins); upper_mag = spectral_max_magnitude(mag_info->upper_bins); upper_max_index = spectral_max_index_ht40(mag_info->upper_bins); max_exp = mag_info->max_exp & 0xf; /* Don't try to read something outside the read buffer * in case of a missing byte (so bins[0] will be outside * the read buffer) */ if (bytes_read < SPECTRAL_HT20_40_SAMPLE_LEN && ((upper_max_index < 1) || (lower_max_index < 1))) return -1; if (((sample[upper_max_index + dc_pos] & 0xf8) != ((upper_mag >> max_exp) & 0xf8)) || ((sample[lower_max_index] & 0xf8) != ((lower_mag >> max_exp) & 0xf8))) return -1; else return 0; } typedef int (ath_cmn_fft_sample_handler) (struct ath_rx_status *rs, struct ath_spec_scan_priv *spec_priv, u8 *sample_buf, u64 tsf, u16 freq, int chan_type); static int ath_cmn_process_ht20_fft(struct ath_rx_status *rs, struct ath_spec_scan_priv *spec_priv, u8 *sample_buf, u64 tsf, u16 freq, int chan_type) { struct fft_sample_ht20 fft_sample_20; struct ath_common *common = ath9k_hw_common(spec_priv->ah); struct ath_hw *ah = spec_priv->ah; struct ath_ht20_mag_info *mag_info; struct fft_sample_tlv *tlv; int i = 0; int ret = 0; int dc_pos = SPECTRAL_HT20_NUM_BINS / 2; u16 magnitude, tmp_mag, length; u8 max_index, bitmap_w, max_exp; length = sizeof(fft_sample_20) - sizeof(struct fft_sample_tlv); fft_sample_20.tlv.type = ATH_FFT_SAMPLE_HT20; fft_sample_20.tlv.length = __cpu_to_be16(length); fft_sample_20.freq = __cpu_to_be16(freq); fft_sample_20.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); fft_sample_20.noise = ah->noise; mag_info = (struct ath_ht20_mag_info *) (sample_buf + SPECTRAL_HT20_NUM_BINS); magnitude = spectral_max_magnitude(mag_info->all_bins); fft_sample_20.max_magnitude = __cpu_to_be16(magnitude); max_index = spectral_max_index_ht20(mag_info->all_bins); fft_sample_20.max_index = max_index; bitmap_w = spectral_bitmap_weight(mag_info->all_bins); fft_sample_20.bitmap_weight = bitmap_w; max_exp = mag_info->max_exp & 0xf; fft_sample_20.max_exp = max_exp; fft_sample_20.tsf = __cpu_to_be64(tsf); memcpy(fft_sample_20.data, sample_buf, SPECTRAL_HT20_NUM_BINS); ath_dbg(common, SPECTRAL_SCAN, "FFT HT20 frame: max mag 0x%X," "max_mag_idx %i\n", magnitude >> max_exp, max_index); if ((fft_sample_20.data[max_index] & 0xf8) != ((magnitude >> max_exp) & 0xf8)) { ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n"); ret = -1; } /* DC value (value in the middle) is the blind spot of the spectral * sample and invalid, interpolate it. */ fft_sample_20.data[dc_pos] = (fft_sample_20.data[dc_pos + 1] + fft_sample_20.data[dc_pos - 1]) / 2; /* Check if the maximum magnitude is indeed maximum, * also if the maximum value was at dc_pos, calculate * a new one (since value at dc_pos is invalid). */ if (max_index == dc_pos) { tmp_mag = 0; for (i = 0; i < dc_pos; i++) { if (fft_sample_20.data[i] > tmp_mag) { tmp_mag = fft_sample_20.data[i]; fft_sample_20.max_index = i; } } magnitude = tmp_mag << max_exp; fft_sample_20.max_magnitude = __cpu_to_be16(magnitude); ath_dbg(common, SPECTRAL_SCAN, "Calculated new lower max 0x%X at %i\n", tmp_mag, fft_sample_20.max_index); } else for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) { if (fft_sample_20.data[i] == (magnitude >> max_exp)) ath_dbg(common, SPECTRAL_SCAN, "Got max: 0x%X at index %i\n", fft_sample_20.data[i], i); if (fft_sample_20.data[i] > (magnitude >> max_exp)) { ath_dbg(common, SPECTRAL_SCAN, "Got bin %i greater than max: 0x%X\n", i, fft_sample_20.data[i]); ret = -1; } } if (ret < 0) return ret; tlv = (struct fft_sample_tlv *)&fft_sample_20; ath_debug_send_fft_sample(spec_priv, tlv); return 0; } static int ath_cmn_process_ht20_40_fft(struct ath_rx_status *rs, struct ath_spec_scan_priv *spec_priv, u8 *sample_buf, u64 tsf, u16 freq, int chan_type) { struct fft_sample_ht20_40 fft_sample_40; struct ath_common *common = ath9k_hw_common(spec_priv->ah); struct ath_hw *ah = spec_priv->ah; struct ath9k_hw_cal_data *caldata = ah->caldata; struct ath_ht20_40_mag_info *mag_info; struct fft_sample_tlv *tlv; int dc_pos = SPECTRAL_HT20_40_NUM_BINS / 2; int i = 0; int ret = 0; s16 ext_nf; u16 lower_mag, upper_mag, tmp_mag, length; s8 lower_rssi, upper_rssi; u8 lower_max_index, upper_max_index; u8 lower_bitmap_w, upper_bitmap_w, max_exp; if (caldata) ext_nf = ath9k_hw_getchan_noise(ah, ah->curchan, caldata->nfCalHist[3].privNF); else ext_nf = ATH_DEFAULT_NOISE_FLOOR; length = sizeof(fft_sample_40) - sizeof(struct fft_sample_tlv); fft_sample_40.tlv.type = ATH_FFT_SAMPLE_HT20_40; fft_sample_40.tlv.length = __cpu_to_be16(length); fft_sample_40.freq = __cpu_to_be16(freq); fft_sample_40.channel_type = chan_type; if (chan_type == NL80211_CHAN_HT40PLUS) { lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]); fft_sample_40.lower_noise = ah->noise; fft_sample_40.upper_noise = ext_nf; } else { lower_rssi = fix_rssi_inv_only(rs->rs_rssi_ext[0]); upper_rssi = fix_rssi_inv_only(rs->rs_rssi_ctl[0]); fft_sample_40.lower_noise = ext_nf; fft_sample_40.upper_noise = ah->noise; } fft_sample_40.lower_rssi = lower_rssi; fft_sample_40.upper_rssi = upper_rssi; mag_info = (struct ath_ht20_40_mag_info *) (sample_buf + SPECTRAL_HT20_40_NUM_BINS); lower_mag = spectral_max_magnitude(mag_info->lower_bins); fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag); upper_mag = spectral_max_magnitude(mag_info->upper_bins); fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag); lower_max_index = spectral_max_index_ht40(mag_info->lower_bins); fft_sample_40.lower_max_index = lower_max_index; upper_max_index = spectral_max_index_ht40(mag_info->upper_bins); fft_sample_40.upper_max_index = upper_max_index; lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins); fft_sample_40.lower_bitmap_weight = lower_bitmap_w; upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins); fft_sample_40.upper_bitmap_weight = upper_bitmap_w; max_exp = mag_info->max_exp & 0xf; fft_sample_40.max_exp = max_exp; fft_sample_40.tsf = __cpu_to_be64(tsf); memcpy(fft_sample_40.data, sample_buf, SPECTRAL_HT20_40_NUM_BINS); ath_dbg(common, SPECTRAL_SCAN, "FFT HT20/40 frame: lower mag 0x%X," "lower_mag_idx %i, upper mag 0x%X," "upper_mag_idx %i\n", lower_mag >> max_exp, lower_max_index, upper_mag >> max_exp, upper_max_index); /* Check if we got the expected magnitude values at * the expected bins */ if (((fft_sample_40.data[upper_max_index + dc_pos] & 0xf8) != ((upper_mag >> max_exp) & 0xf8)) || ((fft_sample_40.data[lower_max_index] & 0xf8) != ((lower_mag >> max_exp) & 0xf8))) { ath_dbg(common, SPECTRAL_SCAN, "Magnitude mismatch !\n"); ret = -1; } /* DC value (value in the middle) is the blind spot of the spectral * sample and invalid, interpolate it. */ fft_sample_40.data[dc_pos] = (fft_sample_40.data[dc_pos + 1] + fft_sample_40.data[dc_pos - 1]) / 2; /* Check if the maximum magnitudes are indeed maximum, * also if the maximum value was at dc_pos, calculate * a new one (since value at dc_pos is invalid). */ if (lower_max_index == dc_pos) { tmp_mag = 0; for (i = 0; i < dc_pos; i++) { if (fft_sample_40.data[i] > tmp_mag) { tmp_mag = fft_sample_40.data[i]; fft_sample_40.lower_max_index = i; } } lower_mag = tmp_mag << max_exp; fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag); ath_dbg(common, SPECTRAL_SCAN, "Calculated new lower max 0x%X at %i\n", tmp_mag, fft_sample_40.lower_max_index); } else for (i = 0; i < dc_pos; i++) { if (fft_sample_40.data[i] == (lower_mag >> max_exp)) ath_dbg(common, SPECTRAL_SCAN, "Got lower mag: 0x%X at index %i\n", fft_sample_40.data[i], i); if (fft_sample_40.data[i] > (lower_mag >> max_exp)) { ath_dbg(common, SPECTRAL_SCAN, "Got lower bin %i higher than max: 0x%X\n", i, fft_sample_40.data[i]); ret = -1; } } if (upper_max_index == dc_pos) { tmp_mag = 0; for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) { if (fft_sample_40.data[i] > tmp_mag) { tmp_mag = fft_sample_40.data[i]; fft_sample_40.upper_max_index = i; } } upper_mag = tmp_mag << max_exp; fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag); ath_dbg(common, SPECTRAL_SCAN, "Calculated new upper max 0x%X at %i\n", tmp_mag, fft_sample_40.upper_max_index); } else for (i = dc_pos; i < SPECTRAL_HT20_40_NUM_BINS; i++) { if (fft_sample_40.data[i] == (upper_mag >> max_exp)) ath_dbg(common, SPECTRAL_SCAN, "Got upper mag: 0x%X at index %i\n", fft_sample_40.data[i], i); if (fft_sample_40.data[i] > (upper_mag >> max_exp)) { ath_dbg(common, SPECTRAL_SCAN, "Got upper bin %i higher than max: 0x%X\n", i, fft_sample_40.data[i]); ret = -1; } } if (ret < 0) return ret; tlv = (struct fft_sample_tlv *)&fft_sample_40; ath_debug_send_fft_sample(spec_priv, tlv); return 0; } static inline void ath_cmn_copy_fft_frame(u8 *in, u8 *out, int sample_len, int sample_bytes) { switch (sample_bytes - sample_len) { case -1: /* First byte missing */ memcpy(&out[1], in, sample_len - 1); break; case 0: /* Length correct, nothing to do. */ memcpy(out, in, sample_len); break; case 1: /* MAC added 2 extra bytes AND first byte * is missing. */ memcpy(&out[1], in, 30); out[31] = in[31]; memcpy(&out[32], &in[33], sample_len - 32); break; case 2: /* MAC added 2 extra bytes at bin 30 and 32, * remove them. */ memcpy(out, in, 30); out[30] = in[31]; memcpy(&out[31], &in[33], sample_len - 31); break; default: break; } } static int ath_cmn_is_fft_buf_full(struct ath_spec_scan_priv *spec_priv) { int i = 0; int ret = 0; struct rchan_buf *buf; struct rchan *rc = spec_priv->rfs_chan_spec_scan; for_each_possible_cpu(i) { if ((buf = *per_cpu_ptr(rc->buf, i))) { ret += relay_buf_full(buf); } } if (ret) return 1; else return 0; } /* returns 1 if this was a spectral frame, even if not handled. */ int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr, struct ath_rx_status *rs, u64 tsf) { u8 sample_buf[SPECTRAL_SAMPLE_MAX_LEN] = {0}; struct ath_hw *ah = spec_priv->ah; struct ath_common *common = ath9k_hw_common(spec_priv->ah); struct ath_softc *sc = (struct ath_softc *)common->priv; u8 num_bins, *vdata = (u8 *)hdr; struct ath_radar_info *radar_info; int len = rs->rs_datalen; int i; int got_slen = 0; u8 *sample_start; int sample_bytes = 0; int ret = 0; u16 fft_len, sample_len, freq = ah->curchan->chan->center_freq; enum nl80211_channel_type chan_type; ath_cmn_fft_idx_validator *fft_idx_validator; ath_cmn_fft_sample_handler *fft_handler; /* AR9280 and before report via ATH9K_PHYERR_RADAR, AR93xx and newer * via ATH9K_PHYERR_SPECTRAL. Haven't seen ATH9K_PHYERR_FALSE_RADAR_EXT * yet, but this is supposed to be possible as well. */ if (rs->rs_phyerr != ATH9K_PHYERR_RADAR && rs->rs_phyerr != ATH9K_PHYERR_FALSE_RADAR_EXT && rs->rs_phyerr != ATH9K_PHYERR_SPECTRAL) return 0; /* check if spectral scan bit is set. This does not have to be checked * if received through a SPECTRAL phy error, but shouldn't hurt. */ radar_info = ((struct ath_radar_info *)&vdata[len]) - 1; if (!(radar_info->pulse_bw_info & SPECTRAL_SCAN_BITMASK)) return 0; if (!spec_priv->rfs_chan_spec_scan) return 1; /* Output buffers are full, no need to process anything * since there is no space to put the result anyway */ ret = ath_cmn_is_fft_buf_full(spec_priv); if (ret == 1) { ath_dbg(common, SPECTRAL_SCAN, "FFT report ignored, no space " "left on output buffers\n"); return 1; } chan_type = cfg80211_get_chandef_type(&common->hw->conf.chandef); if ((chan_type == NL80211_CHAN_HT40MINUS) || (chan_type == NL80211_CHAN_HT40PLUS)) { fft_len = SPECTRAL_HT20_40_TOTAL_DATA_LEN; sample_len = SPECTRAL_HT20_40_SAMPLE_LEN; num_bins = SPECTRAL_HT20_40_NUM_BINS; fft_idx_validator = &ath_cmn_max_idx_verify_ht20_40_fft; fft_handler = &ath_cmn_process_ht20_40_fft; } else { fft_len = SPECTRAL_HT20_TOTAL_DATA_LEN; sample_len = SPECTRAL_HT20_SAMPLE_LEN; num_bins = SPECTRAL_HT20_NUM_BINS; fft_idx_validator = ath_cmn_max_idx_verify_ht20_fft; fft_handler = &ath_cmn_process_ht20_fft; } ath_dbg(common, SPECTRAL_SCAN, "Got radar dump bw_info: 0x%X," "len: %i fft_len: %i\n", radar_info->pulse_bw_info, len, fft_len); sample_start = vdata; for (i = 0; i < len - 2; i++) { sample_bytes++; /* Only a single sample received, no need to look * for the sample's end, do the correction based * on the packet's length instead. Note that hw * will always put the radar_info structure on * the end. */ if (len <= fft_len + 2) { sample_bytes = len - sizeof(struct ath_radar_info); got_slen = 1; } /* Search for the end of the FFT frame between * sample_len - 1 and sample_len + 2. exp_max is 3 * bits long and it's the only value on the last * byte of the frame so since it'll be smaller than * the next byte (the first bin of the next sample) * 90% of the time, we can use it as a separator. */ if (vdata[i] <= 0x7 && sample_bytes >= sample_len - 1) { /* Got a frame length within boundaries, there are * four scenarios here: * * a) sample_len -> We got the correct length * b) sample_len + 2 -> 2 bytes added around bin[31] * c) sample_len - 1 -> The first byte is missing * d) sample_len + 1 -> b + c at the same time * * When MAC adds 2 extra bytes, bin[31] and bin[32] * have the same value, so we can use that for further * verification in cases b and d. */ /* Did we go too far ? If so we couldn't determine * this sample's boundaries, discard any further * data */ if ((sample_bytes > sample_len + 2) || ((sample_bytes > sample_len) && (sample_start[31] != sample_start[32]))) break; /* See if we got a valid frame by checking the * consistency of mag_info fields. This is to * prevent from "fixing" a correct frame. * Failure is non-fatal, later frames may * be valid. */ if (!fft_idx_validator(&vdata[i], i)) { ath_dbg(common, SPECTRAL_SCAN, "Found valid fft frame at %i\n", i); got_slen = 1; } /* We expect 1 - 2 more bytes */ else if ((sample_start[31] == sample_start[32]) && (sample_bytes >= sample_len) && (sample_bytes < sample_len + 2) && (vdata[i + 1] <= 0x7)) continue; /* Try to distinguish cases a and c */ else if ((sample_bytes == sample_len - 1) && (vdata[i + 1] <= 0x7)) continue; got_slen = 1; } if (got_slen) { ath_dbg(common, SPECTRAL_SCAN, "FFT frame len: %i\n", sample_bytes); /* Only try to fix a frame if it's the only one * on the report, else just skip it. */ if (sample_bytes != sample_len && len <= fft_len + 2) { ath_cmn_copy_fft_frame(sample_start, sample_buf, sample_len, sample_bytes); ret = fft_handler(rs, spec_priv, sample_buf, tsf, freq, chan_type); if (ret == 0) RX_STAT_INC(sc, rx_spectral_sample_good); else RX_STAT_INC(sc, rx_spectral_sample_err); memset(sample_buf, 0, SPECTRAL_SAMPLE_MAX_LEN); /* Mix the received bins to the /dev/random * pool */ add_device_randomness(sample_buf, num_bins); } /* Process a normal frame */ if (sample_bytes == sample_len) { ret = fft_handler(rs, spec_priv, sample_start, tsf, freq, chan_type); if (ret == 0) RX_STAT_INC(sc, rx_spectral_sample_good); else RX_STAT_INC(sc, rx_spectral_sample_err); /* Mix the received bins to the /dev/random * pool */ add_device_randomness(sample_start, num_bins); } /* Short report processed, break out of the * loop. */ if (len <= fft_len + 2) return 1; sample_start = &vdata[i + 1]; /* -1 to grab sample_len -1, -2 since * they 'll get increased by one. In case * of failure try to recover by going byte * by byte instead. */ if (ret == 0) { i += num_bins - 2; sample_bytes = num_bins - 2; } got_slen = 0; } } i -= num_bins - 2; if (len - i != sizeof(struct ath_radar_info)) ath_dbg(common, SPECTRAL_SCAN, "FFT report truncated" "(bytes left: %i)\n", len - i); return 1; } EXPORT_SYMBOL(ath_cmn_process_fft); /*********************/ /* spectral_scan_ctl */ /*********************/ static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ath_spec_scan_priv *spec_priv = file->private_data; char *mode = ""; unsigned int len; switch (spec_priv->spectral_mode) { case SPECTRAL_DISABLED: mode = "disable"; break; case SPECTRAL_BACKGROUND: mode = "background"; break; case SPECTRAL_CHANSCAN: mode = "chanscan"; break; case SPECTRAL_MANUAL: mode = "manual"; break; } len = strlen(mode); return simple_read_from_buffer(user_buf, count, ppos, mode, len); } void ath9k_cmn_spectral_scan_trigger(struct ath_common *common, struct ath_spec_scan_priv *spec_priv) { struct ath_hw *ah = spec_priv->ah; u32 rxfilter; if (IS_ENABLED(CONFIG_ATH9K_TX99)) return; if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { ath_err(common, "spectrum analyzer not implemented on this hardware\n"); return; } if (!spec_priv->spec_config.enabled) return; ath_ps_ops(common)->wakeup(common); rxfilter = ath9k_hw_getrxfilter(ah); ath9k_hw_setrxfilter(ah, rxfilter | ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR); /* TODO: usually this should not be neccesary, but for some reason * (or in some mode?) the trigger must be called after the * configuration, otherwise the register will have its values reset * (on my ar9220 to value 0x01002310) */ ath9k_cmn_spectral_scan_config(common, spec_priv, spec_priv->spectral_mode); ath9k_hw_ops(ah)->spectral_scan_trigger(ah); ath_ps_ops(common)->restore(common); } EXPORT_SYMBOL(ath9k_cmn_spectral_scan_trigger); int ath9k_cmn_spectral_scan_config(struct ath_common *common, struct ath_spec_scan_priv *spec_priv, enum spectral_mode spectral_mode) { struct ath_hw *ah = spec_priv->ah; if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { ath_err(common, "spectrum analyzer not implemented on this hardware\n"); return -1; } switch (spectral_mode) { case SPECTRAL_DISABLED: spec_priv->spec_config.enabled = 0; break; case SPECTRAL_BACKGROUND: /* send endless samples. * TODO: is this really useful for "background"? */ spec_priv->spec_config.endless = 1; spec_priv->spec_config.enabled = 1; break; case SPECTRAL_CHANSCAN: case SPECTRAL_MANUAL: spec_priv->spec_config.endless = 0; spec_priv->spec_config.enabled = 1; break; default: return -1; } ath_ps_ops(common)->wakeup(common); ath9k_hw_ops(ah)->spectral_scan_config(ah, &spec_priv->spec_config); ath_ps_ops(common)->restore(common); spec_priv->spectral_mode = spectral_mode; return 0; } EXPORT_SYMBOL(ath9k_cmn_spectral_scan_config); static ssize_t write_file_spec_scan_ctl(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct ath_spec_scan_priv *spec_priv = file->private_data; struct ath_common *common = ath9k_hw_common(spec_priv->ah); char buf[32]; ssize_t len; if (IS_ENABLED(CONFIG_ATH9K_TX99)) return -EOPNOTSUPP; len = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, len)) return -EFAULT; buf[len] = '\0'; if (strncmp("trigger", buf, 7) == 0) { ath9k_cmn_spectral_scan_trigger(common, spec_priv); } else if (strncmp("background", buf, 10) == 0) { ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_BACKGROUND); ath_dbg(common, CONFIG, "spectral scan: background mode enabled\n"); } else if (strncmp("chanscan", buf, 8) == 0) { ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_CHANSCAN); ath_dbg(common, CONFIG, "spectral scan: channel scan mode enabled\n"); } else if (strncmp("manual", buf, 6) == 0) { ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_MANUAL); ath_dbg(common, CONFIG, "spectral scan: manual mode enabled\n"); } else if (strncmp("disable", buf, 7) == 0) { ath9k_cmn_spectral_scan_config(common, spec_priv, SPECTRAL_DISABLED); ath_dbg(common, CONFIG, "spectral scan: disabled\n"); } else { return -EINVAL; } return count; } static const struct file_operations fops_spec_scan_ctl = { .read = read_file_spec_scan_ctl, .write = write_file_spec_scan_ctl, .open = simple_open, .owner = THIS_MODULE, .llseek = default_llseek, }; /*************************/ /* spectral_short_repeat */ /*************************/ static ssize_t read_file_spectral_short_repeat(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ath_spec_scan_priv *spec_priv = file->private_data; char buf[32]; unsigned int len; len = sprintf(buf, "%d\n", spec_priv->spec_config.short_repeat); return simple_read_from_buffer(user_buf, count, ppos, buf, len); } static ssize_t write_file_spectral_short_repeat(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct ath_spec_scan_priv *spec_priv = 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 > 1) return -EINVAL; spec_priv->spec_config.short_repeat = val; return count; } static const struct file_operations fops_spectral_short_repeat = { .read = read_file_spectral_short_repeat, .write = write_file_spectral_short_repeat, .open = simple_open, .owner = THIS_MODULE, .llseek = default_llseek, }; /******************/ /* spectral_count */ /******************/ static ssize_t read_file_spectral_count(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ath_spec_scan_priv *spec_priv = file->private_data; char buf[32]; unsigned int len; len = sprintf(buf, "%d\n", spec_priv->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_spec_scan_priv *spec_priv = 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; spec_priv->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_spec_scan_priv *spec_priv = file->private_data; char buf[32]; unsigned int len; len = sprintf(buf, "%d\n", spec_priv->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_spec_scan_priv *spec_priv = 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; spec_priv->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_spec_scan_priv *spec_priv = file->private_data; char buf[32]; unsigned int len; len = sprintf(buf, "%d\n", spec_priv->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_spec_scan_priv *spec_priv = 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; spec_priv->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_cmn_spectral_deinit_debug(struct ath_spec_scan_priv *spec_priv) { if (spec_priv->rfs_chan_spec_scan) { relay_close(spec_priv->rfs_chan_spec_scan); spec_priv->rfs_chan_spec_scan = NULL; } } EXPORT_SYMBOL(ath9k_cmn_spectral_deinit_debug); void ath9k_cmn_spectral_init_debug(struct ath_spec_scan_priv *spec_priv, struct dentry *debugfs_phy) { spec_priv->rfs_chan_spec_scan = relay_open("spectral_scan", debugfs_phy, 1024, 256, &rfs_spec_scan_cb, NULL); if (!spec_priv->rfs_chan_spec_scan) return; debugfs_create_file("spectral_scan_ctl", 0600, debugfs_phy, spec_priv, &fops_spec_scan_ctl); debugfs_create_file("spectral_short_repeat", 0600, debugfs_phy, spec_priv, &fops_spectral_short_repeat); debugfs_create_file("spectral_count", 0600, debugfs_phy, spec_priv, &fops_spectral_count); debugfs_create_file("spectral_period", 0600, debugfs_phy, spec_priv, &fops_spectral_period); debugfs_create_file("spectral_fft_period", 0600, debugfs_phy, spec_priv, &fops_spectral_fft_period); } EXPORT_SYMBOL(ath9k_cmn_spectral_init_debug); |