1 files changed, 0 insertions, 311 deletions
diff --git a/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c b/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c
deleted file mode 100644
index 491305c81fce..000000000000
--- a/drivers/net/wireless/ath/ath9k/dfs_pattern_detector.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/*
- * Copyright (c) 2012 Neratec Solutions AG
- *
- * 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/slab.h>
-#include <linux/export.h>
-
-#include "dfs_pattern_detector.h"
-#include "dfs_pri_detector.h"
-#include "ath9k.h"
-
-/*
- * tolerated deviation of radar time stamp in usecs on both sides
- * TODO: this might need to be HW-dependent
- */
-#define PRI_TOLERANCE	16
-
-/**
- * struct radar_types - contains array of patterns defined for one DFS domain
- * @domain: DFS regulatory domain
- * @num_radar_types: number of radar types to follow
- * @radar_types: radar types array
- */
-struct radar_types {
-	enum nl80211_dfs_regions region;
-	u32 num_radar_types;
-	const struct radar_detector_specs *radar_types;
-};
-
-/* percentage on ppb threshold to trigger detection */
-#define MIN_PPB_THRESH	50
-#define PPB_THRESH(PPB) ((PPB * MIN_PPB_THRESH + 50) / 100)
-#define PRF2PRI(PRF) ((1000000 + PRF / 2) / PRF)
-/* percentage of pulse width tolerance */
-#define WIDTH_TOLERANCE 5
-#define WIDTH_LOWER(X) ((X*(100-WIDTH_TOLERANCE)+50)/100)
-#define WIDTH_UPPER(X) ((X*(100+WIDTH_TOLERANCE)+50)/100)
-
-#define ETSI_PATTERN(ID, WMIN, WMAX, PMIN, PMAX, PRF, PPB)	\
-{								\
-	ID, WIDTH_LOWER(WMIN), WIDTH_UPPER(WMAX),		\
-	(PRF2PRI(PMAX) - PRI_TOLERANCE),			\
-	(PRF2PRI(PMIN) * PRF + PRI_TOLERANCE), PRF, PPB * PRF,	\
-	PPB_THRESH(PPB), PRI_TOLERANCE,				\
-}
-
-/* radar types as defined by ETSI EN-301-893 v1.5.1 */
-static const struct radar_detector_specs etsi_radar_ref_types_v15[] = {
-	ETSI_PATTERN(0,  0,  1,  700,  700, 1, 18),
-	ETSI_PATTERN(1,  0,  5,  200, 1000, 1, 10),
-	ETSI_PATTERN(2,  0, 15,  200, 1600, 1, 15),
-	ETSI_PATTERN(3,  0, 15, 2300, 4000, 1, 25),
-	ETSI_PATTERN(4, 20, 30, 2000, 4000, 1, 20),
-	ETSI_PATTERN(5,  0,  2,  300,  400, 3, 10),
-	ETSI_PATTERN(6,  0,  2,  400, 1200, 3, 15),
-};
-
-static const struct radar_types etsi_radar_types_v15 = {
-	.region			= NL80211_DFS_ETSI,
-	.num_radar_types	= ARRAY_SIZE(etsi_radar_ref_types_v15),
-	.radar_types		= etsi_radar_ref_types_v15,
-};
-
-/* for now, we support ETSI radar types, FCC and JP are TODO */
-static const struct radar_types *dfs_domains[] = {
-	&etsi_radar_types_v15,
-};
-
-/**
- * get_dfs_domain_radar_types() - get radar types for a given DFS domain
- * @param domain DFS domain
- * @return radar_types ptr on success, NULL if DFS domain is not supported
- */
-static const struct radar_types *
-get_dfs_domain_radar_types(enum nl80211_dfs_regions region)
-{
-	u32 i;
-	for (i = 0; i < ARRAY_SIZE(dfs_domains); i++) {
-		if (dfs_domains[i]->region == region)
-			return dfs_domains[i];
-	}
-	return NULL;
-}
-
-/**
- * struct channel_detector - detector elements for a DFS channel
- * @head: list_head
- * @freq: frequency for this channel detector in MHz
- * @detectors: array of dynamically created detector elements for this freq
- *
- * Channel detectors are required to provide multi-channel DFS detection, e.g.
- * to support off-channel scanning. A pattern detector has a list of channels
- * radar pulses have been reported for in the past.
- */
-struct channel_detector {
-	struct list_head head;
-	u16 freq;
-	struct pri_detector **detectors;
-};
-
-/* channel_detector_reset() - reset detector lines for a given channel */
-static void channel_detector_reset(struct dfs_pattern_detector *dpd,
-				   struct channel_detector *cd)
-{
-	u32 i;
-	if (cd == NULL)
-		return;
-	for (i = 0; i < dpd->num_radar_types; i++)
-		cd->detectors[i]->reset(cd->detectors[i], dpd->last_pulse_ts);
-}
-
-/* channel_detector_exit() - destructor */
-static void channel_detector_exit(struct dfs_pattern_detector *dpd,
-				  struct channel_detector *cd)
-{
-	u32 i;
-	if (cd == NULL)
-		return;
-	list_del(&cd->head);
-	for (i = 0; i < dpd->num_radar_types; i++) {
-		struct pri_detector *de = cd->detectors[i];
-		if (de != NULL)
-			de->exit(de);
-	}
-	kfree(cd->detectors);
-	kfree(cd);
-}
-
-static struct channel_detector *
-channel_detector_create(struct dfs_pattern_detector *dpd, u16 freq)
-{
-	u32 sz, i;
-	struct channel_detector *cd;
-	struct ath_common *common = ath9k_hw_common(dpd->ah);
-
-	cd = kmalloc(sizeof(*cd), GFP_ATOMIC);
-	if (cd == NULL)
-		goto fail;
-
-	INIT_LIST_HEAD(&cd->head);
-	cd->freq = freq;
-	sz = sizeof(cd->detectors) * dpd->num_radar_types;
-	cd->detectors = kzalloc(sz, GFP_ATOMIC);
-	if (cd->detectors == NULL)
-		goto fail;
-
-	for (i = 0; i < dpd->num_radar_types; i++) {
-		const struct radar_detector_specs *rs = &dpd->radar_spec[i];
-		struct pri_detector *de = pri_detector_init(rs);
-		if (de == NULL)
-			goto fail;
-		cd->detectors[i] = de;
-	}
-	list_add(&cd->head, &dpd->channel_detectors);
-	return cd;
-
-fail:
-	ath_dbg(common, DFS,
-		"failed to allocate channel_detector for freq=%d\n", freq);
-	channel_detector_exit(dpd, cd);
-	return NULL;
-}
-
-/**
- * channel_detector_get() - get channel detector for given frequency
- * @param dpd instance pointer
- * @param freq frequency in MHz
- * @return pointer to channel detector on success, NULL otherwise
- *
- * Return existing channel detector for the given frequency or return a
- * newly create one.
- */
-static struct channel_detector *
-channel_detector_get(struct dfs_pattern_detector *dpd, u16 freq)
-{
-	struct channel_detector *cd;
-	list_for_each_entry(cd, &dpd->channel_detectors, head) {
-		if (cd->freq == freq)
-			return cd;
-	}
-	return channel_detector_create(dpd, freq);
-}
-
-/*
- * DFS Pattern Detector
- */
-
-/* dpd_reset(): reset all channel detectors */
-static void dpd_reset(struct dfs_pattern_detector *dpd)
-{
-	struct channel_detector *cd;
-	if (!list_empty(&dpd->channel_detectors))
-		list_for_each_entry(cd, &dpd->channel_detectors, head)
-			channel_detector_reset(dpd, cd);
-
-}
-static void dpd_exit(struct dfs_pattern_detector *dpd)
-{
-	struct channel_detector *cd, *cd0;
-	if (!list_empty(&dpd->channel_detectors))
-		list_for_each_entry_safe(cd, cd0, &dpd->channel_detectors, head)
-			channel_detector_exit(dpd, cd);
-	kfree(dpd);
-}
-
-static bool
-dpd_add_pulse(struct dfs_pattern_detector *dpd, struct pulse_event *event)
-{
-	u32 i;
-	struct channel_detector *cd;
-
-	/*
-	 * pulses received for a non-supported or un-initialized
-	 * domain are treated as detected radars for fail-safety
-	 */
-	if (dpd->region == NL80211_DFS_UNSET)
-		return true;
-
-	cd = channel_detector_get(dpd, event->freq);
-	if (cd == NULL)
-		return false;
-
-	dpd->last_pulse_ts = event->ts;
-	/* reset detector on time stamp wraparound, caused by TSF reset */
-	if (event->ts < dpd->last_pulse_ts)
-		dpd_reset(dpd);
-
-	/* do type individual pattern matching */
-	for (i = 0; i < dpd->num_radar_types; i++) {
-		struct pri_detector *pd = cd->detectors[i];
-		struct pri_sequence *ps = pd->add_pulse(pd, event);
-		if (ps != NULL) {
-			ath_dbg(ath9k_hw_common(dpd->ah), DFS,
-				"DFS: radar found on freq=%d: id=%d, pri=%d, "
-				"count=%d, count_false=%d\n",
-				event->freq, pd->rs->type_id,
-				ps->pri, ps->count, ps->count_falses);
-			channel_detector_reset(dpd, cd);
-			return true;
-		}
-	}
-	return false;
-}
-
-static bool dpd_set_domain(struct dfs_pattern_detector *dpd,
-			   enum nl80211_dfs_regions region)
-{
-	const struct radar_types *rt;
-	struct channel_detector *cd, *cd0;
-
-	if (dpd->region == region)
-		return true;
-
-	dpd->region = NL80211_DFS_UNSET;
-
-	rt = get_dfs_domain_radar_types(region);
-	if (rt == NULL)
-		return false;
-
-	/* delete all channel detectors for previous DFS domain */
-	if (!list_empty(&dpd->channel_detectors))
-		list_for_each_entry_safe(cd, cd0, &dpd->channel_detectors, head)
-			channel_detector_exit(dpd, cd);
-	dpd->radar_spec = rt->radar_types;
-	dpd->num_radar_types = rt->num_radar_types;
-
-	dpd->region = region;
-	return true;
-}
-
-static struct dfs_pattern_detector default_dpd = {
-	.exit		= dpd_exit,
-	.set_dfs_domain	= dpd_set_domain,
-	.add_pulse	= dpd_add_pulse,
-	.region		= NL80211_DFS_UNSET,
-};
-
-struct dfs_pattern_detector *
-dfs_pattern_detector_init(struct ath_hw *ah, enum nl80211_dfs_regions region)
-{
-	struct dfs_pattern_detector *dpd;
-	struct ath_common *common = ath9k_hw_common(ah);
-
-	dpd = kmalloc(sizeof(*dpd), GFP_KERNEL);
-	if (dpd == NULL)
-		return NULL;
-
-	*dpd = default_dpd;
-	INIT_LIST_HEAD(&dpd->channel_detectors);
-
-	dpd->ah = ah;
-	if (dpd->set_dfs_domain(dpd, region))
-		return dpd;
-
-	ath_dbg(common, DFS,"Could not set DFS domain to %d", region);
-	kfree(dpd);
-	return NULL;
-}
-EXPORT_SYMBOL(dfs_pattern_detector_init);