ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/net/wireless/ath/ath9k/common-spectral.c b/marvell/linux/drivers/net/wireless/ath/ath9k/common-spectral.c
new file mode 100644
index 0000000..2119195
--- /dev/null
+++ b/marvell/linux/drivers/net/wireless/ath/ath9k/common-spectral.c
@@ -0,0 +1,1105 @@
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. 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);
+ if (IS_ERR(buf_file))
+ return NULL;
+
+ *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);