- Used the same mechanism to collect spectral scan data as used by the existing
ath9k code.
- Minor refactoring done to the code to separate the ath9k and ath9k_htc
related spectral scan functions into separate files.
This work was done at the WiNGS Lab at the University of Wisconsin Madison.
---
drivers/net/wireless/ath/ath9k/Makefile | 2 +-
drivers/net/wireless/ath/ath9k/ar9002_phy.c | 13 +-
drivers/net/wireless/ath/ath9k/ath9k.h | 1 +
drivers/net/wireless/ath/ath9k/htc.h | 7 +
drivers/net/wireless/ath/ath9k/htc_drv_debug.c | 3 +
drivers/net/wireless/ath/ath9k/htc_drv_init.c | 8 +
drivers/net/wireless/ath/ath9k/htc_drv_main.c | 81 ++++-
drivers/net/wireless/ath/ath9k/htc_drv_txrx.c | 14 +
drivers/net/wireless/ath/ath9k/spectral.h | 19 -
drivers/net/wireless/ath/ath9k/spectral_ath9k.h | 39 ++
drivers/net/wireless/ath/ath9k/spectral_htc.c | 549 +++++++++++++++++++++++
drivers/net/wireless/ath/ath9k/spectral_htc.h | 40 ++
12 files changed, 752 insertions(+), 24 deletions(-)
create mode 100644 drivers/net/wireless/ath/ath9k/spectral_ath9k.h
create mode 100644 drivers/net/wireless/ath/ath9k/spectral_htc.c
create mode 100644 drivers/net/wireless/ath/ath9k/spectral_htc.h
diff --git a/drivers/net/wireless/ath/ath9k/Makefile
b/drivers/net/wireless/ath/ath9k/Makefile
index 8e1c7b0..56555a9 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -64,6 +64,6 @@ ath9k_htc-y += htc_hst.o \
htc_drv_init.o \
htc_drv_gpio.o
-ath9k_htc-$(CONFIG_ATH9K_HTC_DEBUGFS) += htc_drv_debug.o
+ath9k_htc-$(CONFIG_ATH9K_HTC_DEBUGFS) += htc_drv_debug.o spectral_htc.o
obj-$(CONFIG_ATH9K_HTC) += ath9k_htc.o
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index 9a2afa2..21340c9 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -622,7 +622,7 @@ static void ar9002_hw_spectral_scan_config(struct ath_hw
*ah,
struct ath_spec_scan *param)
{
u8 count;
-
+
if (!param->enabled) {
REG_CLR_BIT(ah, AR_PHY_SPECTRAL_SCAN,
AR_PHY_SPECTRAL_SCAN_ENABLE);
@@ -641,13 +641,20 @@ static void ar9002_hw_spectral_scan_config(struct ath_hw
*ah,
/* on AR92xx, the highest bit of count will make the the chip send
* spectral samples endlessly. Check if this really was intended,
* and fix otherwise.
+ *
+ * For AR9271 chipsets, set count = 0 using the debugfs mechanism.
*/
count = param->count;
- if (param->endless)
+ if (param->endless) {
count = 0x80;
- else if (count & 0x80)
+
+ if (AR_SREV_9271(ah)) {
+ count = 0;
+ }
+ } else if (count & 0x80)
count = 0x7f;
+
REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
AR_PHY_SPECTRAL_SCAN_COUNT, count);
REG_RMW_FIELD(ah, AR_PHY_SPECTRAL_SCAN,
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h
b/drivers/net/wireless/ath/ath9k/ath9k.h
index 44d7449..8b59901 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -28,6 +28,7 @@
#include "mci.h"
#include "dfs.h"
#include "spectral.h"
+#include "spectral_ath9k.h"
struct ath_node;
diff --git a/drivers/net/wireless/ath/ath9k/htc.h
b/drivers/net/wireless/ath/ath9k/htc.h
index dab1f0c..5fb778e 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -31,6 +31,8 @@
#include "htc_hst.h"
#include "hif_usb.h"
#include "wmi.h"
+#include "spectral.h"
+#include "spectral_htc.h"
#define ATH_STA_SHORT_CALINTERVAL 1000 /* 1 second */
#define ATH_AP_SHORT_CALINTERVAL 100 /* 100 ms */
@@ -529,6 +531,11 @@ struct ath9k_htc_priv {
struct ath9k_debug debug;
#endif
struct mutex mutex;
+
+ /* relay(fs) channel for spectral scan */
+ struct rchan *rfs_chan_spec_scan;
+ enum spectral_mode spectral_mode;
+ struct ath_spec_scan spec_config;
};
static inline void ath_read_cachesize(struct ath_common *common, int *csz)
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
index fb071ee..e63bab3 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
@@ -992,6 +992,9 @@ int ath9k_htc_init_debug(struct ath_hw *ah)
priv->hw->wiphy->debugfsdir);
if (!priv->debug.debugfs_phy)
return -ENOMEM;
+
+ /* Initialize the debugFS files for the spectral scans */
+ ath9k_htc_spectral_init_debug(priv);
debugfs_create_file("tgt_int_stats", S_IRUSR, priv->debug.debugfs_phy,
priv, &fops_tgt_int_stats);
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 8a3bd5f..71a80ba 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -449,6 +449,14 @@ static void ath9k_init_misc(struct ath9k_htc_priv *priv)
common->last_rssi = ATH_RSSI_DUMMY_MARKER;
priv->ah->opmode = NL80211_IFTYPE_STATION;
+
+ priv->spec_config.enabled = 0;
+ /* Set false for AR9271. */
+ priv->spec_config.short_repeat = false;
+ priv->spec_config.count = 8;
+ priv->spec_config.endless = false;
+ priv->spec_config.period = 18;
+ priv->spec_config.fft_period = 0x02;
}
static int ath9k_init_priv(struct ath9k_htc_priv *priv,
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index f46cd02..d9312a4 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -310,7 +310,11 @@ static int ath9k_htc_set_channel(struct ath9k_htc_priv
*priv,
mod_timer(&priv->tx.cleanup_timer,
jiffies + msecs_to_jiffies(ATH9K_HTC_TX_CLEANUP_INTERVAL));
-
+
+ /* perform spectral scan if requested. */
+ if (test_bit(ATH_OP_SCANNING, &priv->op_flags) &&
+ priv->spectral_mode == SPECTRAL_CHANSCAN)
+ ath9k_htc_spectral_scan_trigger(hw);
err:
ath9k_htc_ps_restore(priv);
return ret;
@@ -1158,6 +1162,81 @@ static void ath9k_htc_remove_interface(struct
ieee80211_hw *hw,
mutex_unlock(&priv->mutex);
}
+/* Start generating the spectral scans. */
+void ath9k_htc_spectral_scan_trigger(struct ieee80211_hw *hw)
+{
+ struct ath9k_htc_priv *priv = hw->priv;
+ struct ath_hw *ah = priv->ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ u32 rxfilter;
+
+ /* TODO: Is this condition required?
+ if (config_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;
+ }
+
+ ath9k_htc_ps_wakeup(priv);
+ 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_htc_spectral_scan_config(hw, priv->spectral_mode);
+ ath9k_hw_ops(ah)->spectral_scan_trigger(ah);
+ ath9k_htc_ps_restore(priv);
+}
+
+/* Configure the status of the spectral scan feature. */
+int ath9k_htc_spectral_scan_config(struct ieee80211_hw *hw,
+ enum spectral_mode spectral_mode)
+{
+ struct ath9k_htc_priv *priv = hw->priv;
+ struct ath_hw *ah = priv->ah;
+ struct ath_common *common = ath9k_hw_common(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:
+ priv->spec_config.enabled = 0;
+ break;
+ case SPECTRAL_BACKGROUND:
+ /* send endless samples.
+ */
+ priv->spec_config.endless = 1;
+ priv->spec_config.enabled = 1;
+ break;
+ case SPECTRAL_CHANSCAN:
+ case SPECTRAL_MANUAL:
+ priv->spec_config.endless = 0;
+ priv->spec_config.enabled = 1;
+ break;
+ default:
+ return -1;
+ }
+
+ ath9k_htc_ps_wakeup(priv);
+ ath9k_hw_ops(ah)->spectral_scan_config(ah, &priv->spec_config);
+ ath9k_htc_ps_restore(priv);
+
+ priv->spectral_mode = spectral_mode;
+
+ return 0;
+}
+
static int ath9k_htc_config(struct ieee80211_hw *hw, u32 changed)
{
struct ath9k_htc_priv *priv = hw->priv;
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
index e8149e3..d77a6b7 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
@@ -1010,6 +1010,20 @@ static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
* separately to avoid doing two lookups for a rate for each frame.
*/
hdr = (struct ieee80211_hdr *)skb->data;
+
+ /*
+ * Process PHY errors and return so that the packet
+ * can be dropped.
+ */
+ if (rx_stats.rs_status & ATH9K_RXERR_PHY) {
+ /* TODO: Not using DFS processing now. */
+ if (ath_htc_process_fft(priv, hdr, &rx_stats,
rx_status->mactime)) {
+ /* TODO: Add code for collecting statistics about spectral scan */
+ }
+
+ goto rx_next;
+ }
+
if (!ath9k_cmn_rx_accept(common, hdr, rx_status, &rx_stats,
&decrypt_error, priv->rxfilter))
goto rx_next;
diff --git a/drivers/net/wireless/ath/ath9k/spectral.h
b/drivers/net/wireless/ath/ath9k/spectral.h
index ead6341..d321f7f 100644
--- a/drivers/net/wireless/ath/ath9k/spectral.h
+++ b/drivers/net/wireless/ath/ath9k/spectral.h
@@ -190,23 +190,4 @@ struct fft_sample_ht20_40 {
u8 data[SPECTRAL_HT20_40_NUM_BINS];
} __packed;
-void ath9k_spectral_init_debug(struct ath_softc *sc);
-void ath9k_spectral_deinit_debug(struct ath_softc *sc);
-
-void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw);
-int ath9k_spectral_scan_config(struct ieee80211_hw *hw,
- enum spectral_mode spectral_mode);
-
-#ifdef CONFIG_ATH9K_DEBUGFS
-int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
- struct ath_rx_status *rs, u64 tsf);
-#else
-static inline int ath_process_fft(struct ath_softc *sc,
- struct ieee80211_hdr *hdr,
- struct ath_rx_status *rs, u64 tsf)
-{
- return 0;
-}
-#endif /* CONFIG_ATH9K_DEBUGFS */
-
#endif /* SPECTRAL_H */
diff --git a/drivers/net/wireless/ath/ath9k/spectral_ath9k.h
b/drivers/net/wireless/ath/ath9k/spectral_ath9k.h
new file mode 100644
index 0000000..08ae2c3
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/spectral_ath9k.h
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+#ifndef SPECTRAL_ATH9K_H
+#define SPECTRAL_ATH9K_H
+
+void ath9k_spectral_init_debug(struct ath_softc *sc);
+void ath9k_spectral_deinit_debug(struct ath_softc *sc);
+
+void ath9k_spectral_scan_trigger(struct ieee80211_hw *hw);
+int ath9k_spectral_scan_config(struct ieee80211_hw *hw,
+ enum spectral_mode spectral_mode);
+
+#ifdef CONFIG_ATH9K_DEBUGFS
+int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
+ struct ath_rx_status *rs, u64 tsf);
+#else
+static inline int ath_process_fft(struct ath_softc *sc,
+ struct ieee80211_hdr *hdr,
+ struct ath_rx_status *rs, u64 tsf)
+{
+ return 0;
+}
+#endif /* CONFIG_ATH9K_DEBUGFS */
+
+#endif /* SPECTRAL_ATH9K_H */
diff --git a/drivers/net/wireless/ath/ath9k/spectral_htc.c
b/drivers/net/wireless/ath/ath9k/spectral_htc.c
new file mode 100644
index 0000000..0e72c1a
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/spectral_htc.c
@@ -0,0 +1,549 @@
+/*
+ * 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 "htc.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 ath9k_htc_priv *priv,
+ struct fft_sample_tlv *fft_sample_tlv)
+{
+ int length;
+
+ if (!priv->rfs_chan_spec_scan)
+ return;
+
+ length = __be16_to_cpu(fft_sample_tlv->length) +
+ sizeof(*fft_sample_tlv);
+
+ relay_write(priv->rfs_chan_spec_scan, fft_sample_tlv, length);
+}
+
+/* returns 1 if this was a spectral frame, even if not handled. */
+int ath_htc_process_fft(struct ath9k_htc_priv *priv,
+ struct ieee80211_hdr *hdr,
+ struct ath_rx_status *rs, u64 tsf)
+{
+ struct ath_hw *ah = priv->ah;
+ u8 num_bins, *bins, *vdata = (u8 *)hdr;
+ struct fft_sample_ht20 fft_sample_20;
+ struct fft_sample_ht20_40 fft_sample_40;
+ struct fft_sample_tlv *tlv;
+ struct ath_radar_info *radar_info;
+ int len = be16_to_cpu(rs->rs_datalen);
+ int dc_pos;
+ u16 fft_len, length, freq = ah->curchan->chan->center_freq;
+ enum nl80211_channel_type chan_type;
+
+ /* 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;
+
+ chan_type = cfg80211_get_chandef_type(&priv->hw->conf.chandef);
+ if ((chan_type == NL80211_CHAN_HT40MINUS) ||
+ (chan_type == NL80211_CHAN_HT40PLUS)) {
+ fft_len = SPECTRAL_HT20_40_TOTAL_DATA_LEN;
+ num_bins = SPECTRAL_HT20_40_NUM_BINS;
+ bins = (u8 *)fft_sample_40.data;
+ } else {
+ fft_len = SPECTRAL_HT20_TOTAL_DATA_LEN;
+ num_bins = SPECTRAL_HT20_NUM_BINS;
+ bins = (u8 *)fft_sample_20.data;
+ }
+
+ /* Variation in the data length is possible and will be fixed later */
+ if ((len > fft_len + 2) || (len < fft_len - 1))
+ return 1;
+
+ switch (len - fft_len) {
+ case 0:
+ /* length correct, nothing to do. */
+ memcpy(bins, vdata, num_bins);
+ break;
+ case -1:
+ /* first byte missing, duplicate it. */
+ memcpy(&bins[1], vdata, num_bins - 1);
+ bins[0] = vdata[0];
+ break;
+ case 2:
+ /* MAC added 2 extra bytes at bin 30 and 32, remove them. */
+ memcpy(bins, vdata, 30);
+ bins[30] = vdata[31];
+ memcpy(&bins[31], &vdata[33], num_bins - 31);
+ break;
+ case 1:
+ /* MAC added 2 extra bytes AND first byte is missing. */
+ bins[0] = vdata[0];
+ memcpy(&bins[1], vdata, 30);
+ bins[31] = vdata[31];
+ memcpy(&bins[32], &vdata[33], num_bins - 32);
+ break;
+ default:
+ return 1;
+ }
+
+ /* DC value (value in the middle) is the blind spot of the spectral
+ * sample and invalid, interpolate it.
+ */
+ dc_pos = num_bins / 2;
+ bins[dc_pos] = (bins[dc_pos + 1] + bins[dc_pos - 1]) / 2;
+
+ if ((chan_type == NL80211_CHAN_HT40MINUS) ||
+ (chan_type == NL80211_CHAN_HT40PLUS)) {
+ s8 lower_rssi, upper_rssi;
+ s16 ext_nf;
+ u8 lower_max_index, upper_max_index;
+ u8 lower_bitmap_w, upper_bitmap_w;
+ u16 lower_mag, upper_mag;
+ struct ath9k_hw_cal_data *caldata = ah->caldata;
+ struct ath_ht20_40_mag_info *mag_info;
+
+ 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 *)radar_info) - 1;
+ lower_mag = spectral_max_magnitude(mag_info->lower_bins);
+ upper_mag = spectral_max_magnitude(mag_info->upper_bins);
+ fft_sample_40.lower_max_magnitude = __cpu_to_be16(lower_mag);
+ fft_sample_40.upper_max_magnitude = __cpu_to_be16(upper_mag);
+ lower_max_index = spectral_max_index(mag_info->lower_bins);
+ upper_max_index = spectral_max_index(mag_info->upper_bins);
+ fft_sample_40.lower_max_index = lower_max_index;
+ fft_sample_40.upper_max_index = upper_max_index;
+ lower_bitmap_w = spectral_bitmap_weight(mag_info->lower_bins);
+ upper_bitmap_w = spectral_bitmap_weight(mag_info->upper_bins);
+ fft_sample_40.lower_bitmap_weight = lower_bitmap_w;
+ fft_sample_40.upper_bitmap_weight = upper_bitmap_w;
+ fft_sample_40.max_exp = mag_info->max_exp & 0xf;
+
+ fft_sample_40.tsf = __cpu_to_be64(tsf);
+
+ tlv = (struct fft_sample_tlv *)&fft_sample_40;
+ } else {
+ u8 max_index, bitmap_w;
+ u16 magnitude;
+ struct ath_ht20_mag_info *mag_info;
+
+ 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 *)radar_info) - 1;
+ magnitude = spectral_max_magnitude(mag_info->all_bins);
+ fft_sample_20.max_magnitude = __cpu_to_be16(magnitude);
+ max_index = spectral_max_index(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;
+ fft_sample_20.max_exp = mag_info->max_exp & 0xf;
+
+ fft_sample_20.tsf = __cpu_to_be64(tsf);
+
+ tlv = (struct fft_sample_tlv *)&fft_sample_20;
+ }
+
+ ath_debug_send_fft_sample(priv, tlv);
+
+ return 1;
+}
+
+/*********************/
+/* 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 ath9k_htc_priv *priv = file->private_data;
+ char *mode = "";
+ unsigned int len;
+
+ switch (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);
+}
+
+static ssize_t write_file_spec_scan_ctl(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath9k_htc_priv *priv = file->private_data;
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ char buf[32];
+ ssize_t len;
+
+ /* TODO: Is it required for ath9k_htc??
+ if (config_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_htc_spectral_scan_trigger(priv->hw);
+ } else if (strncmp("background", buf, 9) == 0) {
+ ath9k_htc_spectral_scan_config(priv->hw, SPECTRAL_BACKGROUND);
+ ath_dbg(common, CONFIG, "spectral scan: background mode
enabled\n");
+ } else if (strncmp("chanscan", buf, 8) == 0) {
+ ath9k_htc_spectral_scan_config(priv->hw, SPECTRAL_CHANSCAN);
+ ath_dbg(common, CONFIG, "spectral scan: channel scan mode
enabled\n");
+ } else if (strncmp("manual", buf, 6) == 0) {
+ ath9k_htc_spectral_scan_config(priv->hw, SPECTRAL_MANUAL);
+ ath_dbg(common, CONFIG, "spectral scan: manual mode enabled\n");
+ } else if (strncmp("disable", buf, 7) == 0) {
+ ath9k_htc_spectral_scan_config(priv->hw, 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 ath9k_htc_priv *priv = file->private_data;
+ char buf[32];
+ unsigned int len;
+
+ len = sprintf(buf, "%d\n", 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 ath9k_htc_priv *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 < 0 || val > 1)
+ return -EINVAL;
+
+ 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 ath9k_htc_priv *priv = file->private_data;
+ char buf[32];
+ unsigned int len;
+
+ len = sprintf(buf, "%d\n", 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 ath9k_htc_priv *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 < 0 || val > 255)
+ return -EINVAL;
+
+ 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 ath9k_htc_priv *priv = file->private_data;
+ char buf[32];
+ unsigned int len;
+
+ len = sprintf(buf, "%d\n", 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 ath9k_htc_priv *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 < 0 || val > 255)
+ return -EINVAL;
+
+ 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 ath9k_htc_priv *priv = file->private_data;
+ char buf[32];
+ unsigned int len;
+
+ len = sprintf(buf, "%d\n", 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 ath9k_htc_priv *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 < 0 || val > 15)
+ return -EINVAL;
+
+ 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_htc_spectral_deinit_debug(struct ath9k_htc_priv *priv)
+{
+ if (config_enabled(CONFIG_ATH9K_DEBUGFS) && priv->rfs_chan_spec_scan) {
+ relay_close(priv->rfs_chan_spec_scan);
+ priv->rfs_chan_spec_scan = NULL;
+ }
+}
+
+void ath9k_htc_spectral_init_debug(struct ath9k_htc_priv *priv)
+{
+ priv->rfs_chan_spec_scan = relay_open("spectral_scan",
+ priv->debug.debugfs_phy,
+ 1024, 256, &rfs_spec_scan_cb,
+ NULL);
+ debugfs_create_file("spectral_scan_ctl",
+ S_IRUSR | S_IWUSR,
+ priv->debug.debugfs_phy, priv,
+ &fops_spec_scan_ctl);
+ debugfs_create_file("spectral_short_repeat",
+ S_IRUSR | S_IWUSR,
+ priv->debug.debugfs_phy, priv,
+ &fops_spectral_short_repeat);
+ debugfs_create_file("spectral_count",
+ S_IRUSR | S_IWUSR,
+ priv->debug.debugfs_phy, priv,
+ &fops_spectral_count);
+ debugfs_create_file("spectral_period",
+ S_IRUSR | S_IWUSR,
+ priv->debug.debugfs_phy, priv,
+ &fops_spectral_period);
+ debugfs_create_file("spectral_fft_period",
+ S_IRUSR | S_IWUSR,
+ priv->debug.debugfs_phy, priv,
+ &fops_spectral_fft_period);
+}
diff --git a/drivers/net/wireless/ath/ath9k/spectral_htc.h
b/drivers/net/wireless/ath/ath9k/spectral_htc.h
new file mode 100644
index 0000000..546a8ac
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/spectral_htc.h
@@ -0,0 +1,40 @@
+/*
+ * 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.
+ */
+
+#ifndef SPECTRAL_HTC_H
+#define SPECTRAL_HTC_H
+
+/* Added a separate set of spectral scan functions for the ath9k_htc driver */
+void ath9k_htc_spectral_init_debug(struct ath9k_htc_priv *priv);
+void ath9k_htc_spectral_deinit_debug(struct ath9k_htc_priv *priv);
+
+void ath9k_htc_spectral_scan_trigger(struct ieee80211_hw *hw);
+int ath9k_htc_spectral_scan_config(struct ieee80211_hw *hw,
+ enum spectral_mode spectral_mode);
+
+#ifdef CONFIG_ATH9K_HTC_DEBUGFS
+int ath_htc_process_fft(struct ath9k_htc_priv *priv, struct ieee80211_hdr *hdr,
+ struct ath_rx_status *rs, u64 tsf);
+#else
+static inline int ath_htc_process_fft(struct ath9k_htc_priv *priv,
+ struct ieee80211_hdr *hdr,
+ struct ath_rx_status *rs, u64 tsf)
+{
+ return 0;
+}
+#endif /* CONFIG_ATH9K_HTC_DEBUGFS */
+
+#endif /* SPECTRAL_HTC_H */
--
1.7.5.4
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