Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 1821 insertions, 0 deletions

diff --git a/drivers/net/wireless/bcmdhd.1.88.45.x.cn/dhd_pno.c b/drivers/net/wireless/bcmdhd.1.88.45.x.cn/dhd_pno.c
new file mode 100755
index 00000000..56f51aee
--- /dev/null
+++ b/drivers/net/wireless/bcmdhd.1.88.45.x.cn/dhd_pno.c
@@ -0,0 +1,1821 @@
+/*
+ * Broadcom Dongle Host Driver (DHD)
+ * Prefered Network Offload and Wi-Fi Location Service(WLS) code.
+ *
+ * $Copyright Open Broadcom Corporation$
+ *
+ * $Id: dhd_pno.c 420056 2013-08-24 00:53:12Z $
+ */
+#include <typedefs.h>
+#include <osl.h>
+
+#include <epivers.h>
+#include <bcmutils.h>
+
+#include <bcmendian.h>
+#include <linuxver.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/sort.h>
+#include <dngl_stats.h>
+#include <wlioctl.h>
+
+#include <proto/bcmevent.h>
+#include <dhd.h>
+#include <dhd_pno.h>
+#include <dhd_dbg.h>
+
+#ifdef __BIG_ENDIAN
+#include <bcmendian.h>
+#define htod32(i) (bcmswap32(i))
+#define htod16(i) (bcmswap16(i))
+#define dtoh32(i) (bcmswap32(i))
+#define dtoh16(i) (bcmswap16(i))
+#define htodchanspec(i) htod16(i)
+#define dtohchanspec(i) dtoh16(i)
+#else
+#define htod32(i) i
+#define htod16(i) i
+#define dtoh32(i) i
+#define dtoh16(i) i
+#define htodchanspec(i) i
+#define dtohchanspec(i) i
+#endif /* IL_BIGENDINA */
+
+#define NULL_CHECK(p, s, err)  \
+			do { \
+				if (!(p)) { \
+					printf("NULL POINTER (%s) : %s\n", __FUNCTION__, (s)); \
+					err = BCME_ERROR; \
+					return err; \
+				} \
+			} while (0)
+#define PNO_GET_PNOSTATE(dhd) ((dhd_pno_status_info_t *)dhd->pno_state)
+#define PNO_BESTNET_LEN 1024
+#define PNO_ON 1
+#define PNO_OFF 0
+#define CHANNEL_2G_MAX 14
+#define MAX_NODE_CNT 5
+#define WLS_SUPPORTED(pno_state) (pno_state->wls_supported == TRUE)
+#define TIME_DIFF(timestamp1, timestamp2) (abs((uint32)(timestamp1/1000)  \
+						- (uint32)(timestamp2/1000)))
+
+#define ENTRY_OVERHEAD strlen("bssid=\nssid=\nfreq=\nlevel=\nage=\ndist=\ndistSd=\n====")
+#define TIME_MIN_DIFF 5
+static inline bool
+is_dfs(uint16 channel)
+{
+	if (channel >= 52 && channel <= 64)			/* class 2 */
+		return TRUE;
+	else if (channel >= 100 && channel <= 140)	/* class 4 */
+		return TRUE;
+	else
+		return FALSE;
+}
+static int
+_dhd_pno_clean(dhd_pub_t *dhd)
+{
+	int pfn = 0;
+	int err;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	/* Disable PNO */
+	err = dhd_iovar(dhd, 0, "pfn", (char *)&pfn, sizeof(pfn), 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfn(error : %d)\n",
+			__FUNCTION__, err));
+		goto exit;
+	}
+	_pno_state->pno_status = DHD_PNO_DISABLED;
+	err = dhd_iovar(dhd, 0, "pfnclear", NULL, 0, 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfnclear(error : %d)\n",
+			__FUNCTION__, err));
+	}
+exit:
+	return err;
+}
+
+static int
+_dhd_pno_suspend(dhd_pub_t *dhd)
+{
+	int err;
+	int suspend = 1;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	err = dhd_iovar(dhd, 0, "pfn_suspend", (char *)&suspend, sizeof(suspend), 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to suspend pfn(error :%d)\n", __FUNCTION__, err));
+		goto exit;
+
+	}
+	_pno_state->pno_status = DHD_PNO_SUSPEND;
+exit:
+	return err;
+}
+static int
+_dhd_pno_enable(dhd_pub_t *dhd, int enable)
+{
+	int err = BCME_OK;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+
+	if (enable & 0xfffe) {
+		DHD_ERROR(("%s invalid value\n", __FUNCTION__));
+		err = BCME_BADARG;
+		goto exit;
+	}
+	if (!dhd_support_sta_mode(dhd)) {
+		DHD_ERROR(("PNO is not allowed for non-STA mode"));
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	if (enable) {
+		if ((_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) &&
+			dhd_is_associated(dhd, NULL, NULL)) {
+			DHD_ERROR(("%s Legacy PNO mode cannot be enabled "
+				"in assoc mode , ignore it\n", __FUNCTION__));
+			err = BCME_BADOPTION;
+			goto exit;
+		}
+	}
+	/* Enable/Disable PNO */
+	err = dhd_iovar(dhd, 0, "pfn", (char *)&enable, sizeof(enable), 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfn_set\n", __FUNCTION__));
+		goto exit;
+	}
+	_pno_state->pno_status = (enable)?
+		DHD_PNO_ENABLED : DHD_PNO_DISABLED;
+	if (!enable)
+		_pno_state->pno_mode = DHD_PNO_NONE_MODE;
+
+	DHD_PNO(("%s set pno as %s\n",
+		__FUNCTION__, enable ? "Enable" : "Disable"));
+exit:
+	return err;
+}
+
+static int
+_dhd_pno_set(dhd_pub_t *dhd, const dhd_pno_params_t *pno_params, dhd_pno_mode_t mode)
+{
+	int err = BCME_OK;
+	wl_pfn_param_t pfn_param;
+	dhd_pno_params_t *_params;
+	dhd_pno_status_info_t *_pno_state;
+	bool combined_scan = FALSE;
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+
+	memset(&pfn_param, 0, sizeof(pfn_param));
+
+	/* set pfn parameters */
+	pfn_param.version = htod32(PFN_VERSION);
+	pfn_param.flags = ((PFN_LIST_ORDER << SORT_CRITERIA_BIT) |
+		(ENABLE << IMMEDIATE_SCAN_BIT) | (ENABLE << REPORT_SEPERATELY_BIT));
+	if (mode == DHD_PNO_LEGACY_MODE) {
+		/* check and set extra pno params */
+		if ((pno_params->params_legacy.pno_repeat != 0) ||
+			(pno_params->params_legacy.pno_freq_expo_max != 0)) {
+			pfn_param.flags |= htod16(ENABLE << ENABLE_ADAPTSCAN_BIT);
+			pfn_param.repeat = (uchar) (pno_params->params_legacy.pno_repeat);
+			pfn_param.exp = (uchar) (pno_params->params_legacy.pno_freq_expo_max);
+		}
+		/* set up pno scan fr */
+		if (pno_params->params_legacy.scan_fr != 0)
+			pfn_param.scan_freq = htod32(pno_params->params_legacy.scan_fr);
+		if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
+			DHD_PNO(("will enable combined scan with BATCHIG SCAN MODE\n"));
+			mode |= DHD_PNO_BATCH_MODE;
+			combined_scan = TRUE;
+		} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
+			DHD_PNO(("will enable combined scan with HOTLIST SCAN MODE\n"));
+			mode |= DHD_PNO_HOTLIST_MODE;
+			combined_scan = TRUE;
+		}
+	}
+	if (mode & (DHD_PNO_BATCH_MODE | DHD_PNO_HOTLIST_MODE)) {
+		/* Scan frequency of 30 sec */
+		pfn_param.scan_freq = htod32(30);
+		/* slow adapt scan is off by default */
+		pfn_param.slow_freq = htod32(0);
+		/* RSSI margin of 30 dBm */
+		pfn_param.rssi_margin = htod16(30);
+		/* Network timeout 60 sec */
+		pfn_param.lost_network_timeout = htod32(60);
+		/* best n = 2 by default */
+		pfn_param.bestn = DEFAULT_BESTN;
+		/* mscan m=0 by default, so not record best networks by default */
+		pfn_param.mscan = DEFAULT_MSCAN;
+		/*  default repeat = 10 */
+		pfn_param.repeat = DEFAULT_REPEAT;
+		/* by default, maximum scan interval = 2^2
+		 * scan_freq when adaptive scan is turned on
+		 */
+		pfn_param.exp = DEFAULT_EXP;
+		if (mode == DHD_PNO_BATCH_MODE) {
+			/* In case of BATCH SCAN */
+			if (pno_params->params_batch.bestn)
+				pfn_param.bestn = pno_params->params_batch.bestn;
+			if (pno_params->params_batch.scan_fr)
+				pfn_param.scan_freq = htod32(pno_params->params_batch.scan_fr);
+			if (pno_params->params_batch.mscan)
+				pfn_param.mscan = pno_params->params_batch.mscan;
+			/* enable broadcast scan */
+			pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
+		} else if (mode == DHD_PNO_HOTLIST_MODE) {
+			/* In case of HOTLIST SCAN */
+			if (pno_params->params_hotlist.scan_fr)
+				pfn_param.scan_freq = htod32(pno_params->params_hotlist.scan_fr);
+			pfn_param.bestn = 0;
+			pfn_param.repeat = 0;
+			/* enable broadcast scan */
+			pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
+		}
+		if (combined_scan) {
+			/* Disable Adaptive Scan */
+			pfn_param.flags &= ~(htod16(ENABLE << ENABLE_ADAPTSCAN_BIT));
+			pfn_param.flags |= (ENABLE << ENABLE_BD_SCAN_BIT);
+			pfn_param.repeat = 0;
+			pfn_param.exp = 0;
+			if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
+				/* In case of Legacy PNO + BATCH SCAN */
+				_params = &(_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS]);
+				if (_params->params_batch.bestn)
+					pfn_param.bestn = _params->params_batch.bestn;
+				if (_params->params_batch.scan_fr)
+					pfn_param.scan_freq = htod32(_params->params_batch.scan_fr);
+				if (_params->params_batch.mscan)
+					pfn_param.mscan = _params->params_batch.mscan;
+			} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
+				/* In case of Legacy PNO + HOTLIST SCAN */
+				_params = &(_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS]);
+				if (_params->params_hotlist.scan_fr)
+				pfn_param.scan_freq = htod32(_params->params_hotlist.scan_fr);
+				pfn_param.bestn = 0;
+				pfn_param.repeat = 0;
+			}
+		}
+	}
+	if (pfn_param.scan_freq < htod32(PNO_SCAN_MIN_FW_SEC) ||
+		pfn_param.scan_freq > htod32(PNO_SCAN_MAX_FW_SEC)) {
+		DHD_ERROR(("%s pno freq(%d sec) is not valid \n",
+			__FUNCTION__, PNO_SCAN_MIN_FW_SEC));
+		err = BCME_BADARG;
+		goto exit;
+	}
+	if (mode == DHD_PNO_BATCH_MODE) {
+		int _tmp = pfn_param.bestn;
+		/* set bestn to calculate the max mscan which firmware supports */
+		err = dhd_iovar(dhd, 0, "pfnmscan", (char *)&_tmp, sizeof(_tmp), 1);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to set pfnmscan\n", __FUNCTION__));
+			goto exit;
+		}
+		/* get max mscan which the firmware supports */
+		err = dhd_iovar(dhd, 0, "pfnmscan", (char *)&_tmp, sizeof(_tmp), 0);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to get pfnmscan\n", __FUNCTION__));
+			goto exit;
+		}
+		DHD_PNO((" returned mscan : %d, set bestn : %d\n", _tmp, pfn_param.bestn));
+		pfn_param.mscan = MIN(pfn_param.mscan, _tmp);
+	}
+	err = dhd_iovar(dhd, 0, "pfn_set", (char *)&pfn_param, sizeof(pfn_param), 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfn_set\n", __FUNCTION__));
+		goto exit;
+	}
+	/* need to return mscan if this is for batch scan instead of err */
+	err = (mode == DHD_PNO_BATCH_MODE)? pfn_param.mscan : err;
+exit:
+	return err;
+}
+static int
+_dhd_pno_add_ssid(dhd_pub_t *dhd, wlc_ssid_t* ssids_list, int nssid)
+{
+	int err = BCME_OK;
+	int i = 0;
+	wl_pfn_t pfn_element;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	if (nssid) {
+		NULL_CHECK(ssids_list, "ssid list is NULL", err);
+	}
+	memset(&pfn_element, 0, sizeof(pfn_element));
+	{
+		int j;
+		for (j = 0; j < nssid; j++) {
+			DHD_PNO(("%d: scan  for  %s size = %d\n", j,
+				ssids_list[j].SSID, ssids_list[j].SSID_len));
+		}
+	}
+	/* Check for broadcast ssid */
+	for (i = 0; i < nssid; i++) {
+		if (!ssids_list[i].SSID_len) {
+			DHD_ERROR(("%d: Broadcast SSID is ilegal for PNO setting\n", i));
+			err = BCME_ERROR;
+			goto exit;
+		}
+	}
+	/* set all pfn ssid */
+	for (i = 0; i < nssid; i++) {
+		pfn_element.infra = htod32(DOT11_BSSTYPE_INFRASTRUCTURE);
+		pfn_element.auth = (DOT11_OPEN_SYSTEM);
+		pfn_element.wpa_auth = htod32(WPA_AUTH_PFN_ANY);
+		pfn_element.wsec = htod32(0);
+		pfn_element.infra = htod32(1);
+		pfn_element.flags = htod32(ENABLE << WL_PFN_HIDDEN_BIT);
+		memcpy((char *)pfn_element.ssid.SSID, ssids_list[i].SSID,
+			ssids_list[i].SSID_len);
+		pfn_element.ssid.SSID_len = ssids_list[i].SSID_len;
+		err = dhd_iovar(dhd, 0, "pfn_add", (char *)&pfn_element,
+			sizeof(pfn_element), 1);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to execute pfn_add\n", __FUNCTION__));
+			goto exit;
+		}
+	}
+exit:
+	return err;
+}
+/* qsort compare function */
+static int
+_dhd_pno_cmpfunc(const void *a, const void *b)
+{
+	return (*(uint16*)a - *(uint16*)b);
+}
+static int
+_dhd_pno_chan_merge(uint16 *d_chan_list, int *nchan,
+	uint16 *chan_list1, int nchan1, uint16 *chan_list2, int nchan2)
+{
+	int err = BCME_OK;
+	int i = 0, j = 0, k = 0;
+	uint16 tmp;
+	NULL_CHECK(d_chan_list, "d_chan_list is NULL", err);
+	NULL_CHECK(nchan, "nchan is NULL", err);
+	NULL_CHECK(chan_list1, "chan_list1 is NULL", err);
+	NULL_CHECK(chan_list2, "chan_list2 is NULL", err);
+	/* chan_list1 and chan_list2 should be sorted at first */
+	while (i < nchan1 && j < nchan2) {
+		tmp = chan_list1[i] < chan_list2[j]?
+			chan_list1[i++] : chan_list2[j++];
+		for (; i < nchan1 && chan_list1[i] == tmp; i++);
+		for (; j < nchan2 && chan_list2[j] == tmp; j++);
+		d_chan_list[k++] = tmp;
+	}
+
+	while (i < nchan1) {
+		tmp = chan_list1[i++];
+		for (; i < nchan1 && chan_list1[i] == tmp; i++);
+		d_chan_list[k++] = tmp;
+	}
+
+	while (j < nchan2) {
+		tmp = chan_list2[j++];
+		for (; j < nchan2 && chan_list2[j] == tmp; j++);
+		d_chan_list[k++] = tmp;
+
+	}
+	*nchan = k;
+	return err;
+}
+static int
+_dhd_pno_get_channels(dhd_pub_t *dhd, uint16 *d_chan_list,
+	int *nchan, uint8 band, bool skip_dfs)
+{
+	int err = BCME_OK;
+	int i, j;
+	uint32 chan_buf[WL_NUMCHANNELS + 1];
+	wl_uint32_list_t *list;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	if (*nchan) {
+		NULL_CHECK(d_chan_list, "d_chan_list is NULL", err);
+	}
+	list = (wl_uint32_list_t *) (void *)chan_buf;
+	list->count = htod32(WL_NUMCHANNELS);
+	err = dhd_wl_ioctl_cmd(dhd, WLC_GET_VALID_CHANNELS, chan_buf, sizeof(chan_buf), FALSE, 0);
+	if (err < 0) {
+		DHD_ERROR(("failed to get channel list (err: %d)\n", err));
+		goto exit;
+	}
+	for (i = 0, j = 0; i < dtoh32(list->count) && i < *nchan; i++) {
+		if (band == WLC_BAND_2G) {
+			if (dtoh32(list->element[i]) > CHANNEL_2G_MAX)
+				continue;
+		} else if (band == WLC_BAND_5G) {
+			if (dtoh32(list->element[i]) <= CHANNEL_2G_MAX)
+				continue;
+			if (skip_dfs && is_dfs(dtoh32(list->element[i])))
+				continue;
+
+		} else { /* All channels */
+			if (skip_dfs && is_dfs(dtoh32(list->element[i])))
+				continue;
+		}
+		d_chan_list[j++] = dtoh32(list->element[i]);
+	}
+	*nchan = j;
+exit:
+	return err;
+}
+static int
+_dhd_pno_convert_format(dhd_pub_t *dhd, struct dhd_pno_batch_params *params_batch,
+	char *buf, int nbufsize)
+{
+	int err = BCME_OK;
+	int bytes_written = 0, nreadsize = 0;
+	int t_delta = 0;
+	int nleftsize = nbufsize;
+	uint8 cnt = 0;
+	char *bp = buf;
+	char eabuf[ETHER_ADDR_STR_LEN];
+#ifdef PNO_DEBUG
+	char *_base_bp;
+	char msg[150];
+#endif
+	dhd_pno_bestnet_entry_t *iter, *next;
+	dhd_pno_scan_results_t *siter, *snext;
+	dhd_pno_best_header_t *phead, *pprev;
+	NULL_CHECK(params_batch, "params_batch is NULL", err);
+	if (nbufsize > 0)
+		NULL_CHECK(buf, "buf is NULL", err);
+	/* initialize the buffer */
+	memset(buf, 0, nbufsize);
+	DHD_PNO(("%s enter \n", __FUNCTION__));
+	/* # of scans */
+	if (!params_batch->get_batch.batch_started) {
+		bp += nreadsize = sprintf(bp, "scancount=%d\n",
+			params_batch->get_batch.expired_tot_scan_cnt);
+		nleftsize -= nreadsize;
+		params_batch->get_batch.batch_started = TRUE;
+	}
+	DHD_PNO(("%s scancount %d\n", __FUNCTION__, params_batch->get_batch.expired_tot_scan_cnt));
+	/* preestimate scan count until which scan result this report is going to end */
+	list_for_each_entry_safe(siter, snext,
+		&params_batch->get_batch.expired_scan_results_list, list) {
+		phead = siter->bestnetheader;
+		while (phead != NULL) {
+			/* if left_size is less than bestheader total size , stop this */
+			if (nleftsize <=
+				(phead->tot_size + phead->tot_cnt * ENTRY_OVERHEAD))
+				goto exit;
+			/* increase scan count */
+			cnt++;
+			/* # best of each scan */
+			DHD_PNO(("\n<loop : %d, apcount %d>\n", cnt - 1, phead->tot_cnt));
+			/* attribute of the scan */
+			if (phead->reason & PNO_STATUS_ABORT_MASK) {
+				bp += nreadsize = sprintf(bp, "trunc\n");
+				nleftsize -= nreadsize;
+			}
+			list_for_each_entry_safe(iter, next,
+				&phead->entry_list, list) {
+				t_delta = jiffies_to_msecs(jiffies - iter->recorded_time);
+#ifdef PNO_DEBUG
+				_base_bp = bp;
+				memset(msg, 0, sizeof(msg));
+#endif
+				/* BSSID info */
+				bp += nreadsize = sprintf(bp, "bssid=%s\n",
+				bcm_ether_ntoa((const struct ether_addr *)&iter->BSSID, eabuf));
+				nleftsize -= nreadsize;
+				/* SSID */
+				bp += nreadsize = sprintf(bp, "ssid=%s\n", iter->SSID);
+				nleftsize -= nreadsize;
+				/* channel */
+				bp += nreadsize = sprintf(bp, "freq=%d\n",
+				wf_channel2mhz(iter->channel,
+				iter->channel <= CH_MAX_2G_CHANNEL?
+				WF_CHAN_FACTOR_2_4_G : WF_CHAN_FACTOR_5_G));
+				nleftsize -= nreadsize;
+				/* RSSI */
+				bp += nreadsize = sprintf(bp, "level=%d\n", iter->RSSI);
+				nleftsize -= nreadsize;
+				/* add the time consumed in Driver to the timestamp of firmware */
+				iter->timestamp += t_delta;
+				bp += nreadsize = sprintf(bp, "age=%d\n", iter->timestamp);
+				nleftsize -= nreadsize;
+				/* RTT0 */
+				bp += nreadsize = sprintf(bp, "dist=%d\n",
+				(iter->rtt0 == 0)? -1 : iter->rtt0);
+				nleftsize -= nreadsize;
+				/* RTT1 */
+				bp += nreadsize = sprintf(bp, "distSd=%d\n",
+				(iter->rtt0 == 0)? -1 : iter->rtt1);
+				nleftsize -= nreadsize;
+				bp += nreadsize = sprintf(bp, "%s", AP_END_MARKER);
+				nleftsize -= nreadsize;
+				list_del(&iter->list);
+				MFREE(dhd->osh, iter, BESTNET_ENTRY_SIZE);
+#ifdef PNO_DEBUG
+				memcpy(msg, _base_bp, bp - _base_bp);
+				DHD_PNO(("Entry : \n%s", msg));
+#endif
+			}
+			bp += nreadsize = sprintf(bp, "%s", SCAN_END_MARKER);
+			DHD_PNO(("%s", SCAN_END_MARKER));
+			nleftsize -= nreadsize;
+			pprev = phead;
+			/* reset the header */
+			siter->bestnetheader = phead = phead->next;
+			MFREE(dhd->osh, pprev, BEST_HEADER_SIZE);
+
+			siter->cnt_header--;
+		}
+		if (phead == NULL) {
+			/* we store all entry in this scan , so it is ok to delete */
+			list_del(&siter->list);
+			MFREE(dhd->osh, siter, SCAN_RESULTS_SIZE);
+		}
+	}
+exit:
+	if (cnt < params_batch->get_batch.expired_tot_scan_cnt) {
+		DHD_ERROR(("Buffer size is small to save all batch entry,"
+			" cnt : %d (remained_scan_cnt): %d\n",
+			cnt, params_batch->get_batch.expired_tot_scan_cnt - cnt));
+	}
+	params_batch->get_batch.expired_tot_scan_cnt -= cnt;
+	/* set FALSE only if the link list  is empty after returning the data */
+	if (list_empty(&params_batch->get_batch.expired_scan_results_list)) {
+		params_batch->get_batch.batch_started = FALSE;
+		bp += sprintf(bp, "%s", RESULTS_END_MARKER);
+		DHD_PNO(("%s", RESULTS_END_MARKER));
+		DHD_PNO(("%s : Getting the batching data is complete\n", __FUNCTION__));
+	}
+	/* return used memory in buffer */
+	bytes_written = (int32)(bp - buf);
+	return bytes_written;
+}
+static int
+_dhd_pno_clear_all_batch_results(dhd_pub_t *dhd, struct list_head *head, bool only_last)
+{
+	int err = BCME_OK;
+	int removed_scan_cnt = 0;
+	dhd_pno_scan_results_t *siter, *snext;
+	dhd_pno_best_header_t *phead, *pprev;
+	dhd_pno_bestnet_entry_t *iter, *next;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(head, "head is NULL", err);
+	NULL_CHECK(head->next, "head->next is NULL", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	list_for_each_entry_safe(siter, snext,
+		head, list) {
+		if (only_last) {
+			/* in case that we need to delete only last one */
+			if (!list_is_last(&siter->list, head)) {
+				/* skip if the one is not last */
+				continue;
+			}
+		}
+		/* delete all data belong if the one is last */
+		phead = siter->bestnetheader;
+		while (phead != NULL) {
+			removed_scan_cnt++;
+			list_for_each_entry_safe(iter, next,
+			&phead->entry_list, list) {
+				list_del(&iter->list);
+				MFREE(dhd->osh, iter, BESTNET_ENTRY_SIZE);
+			}
+			pprev = phead;
+			phead = phead->next;
+			MFREE(dhd->osh, pprev, BEST_HEADER_SIZE);
+		}
+		if (phead == NULL) {
+			/* it is ok to delete top node */
+			list_del(&siter->list);
+			MFREE(dhd->osh, siter, SCAN_RESULTS_SIZE);
+		}
+	}
+	return removed_scan_cnt;
+}
+
+static int
+_dhd_pno_cfg(dhd_pub_t *dhd, uint16 *channel_list, int nchan)
+{
+	int err = BCME_OK;
+	int i = 0;
+	wl_pfn_cfg_t pfncfg_param;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	if (nchan) {
+		NULL_CHECK(channel_list, "nchan is NULL", err);
+	}
+	DHD_PNO(("%s enter :  nchan : %d\n", __FUNCTION__, nchan));
+	memset(&pfncfg_param, 0, sizeof(wl_pfn_cfg_t));
+	/* Setup default values */
+	pfncfg_param.reporttype = htod32(WL_PFN_REPORT_ALLNET);
+	pfncfg_param.channel_num = htod32(0);
+
+	for (i = 0; i < nchan && nchan < WL_NUMCHANNELS; i++)
+		pfncfg_param.channel_list[i] = channel_list[i];
+
+	pfncfg_param.channel_num = htod32(nchan);
+	err = dhd_iovar(dhd, 0, "pfn_cfg", (char *)&pfncfg_param, sizeof(pfncfg_param), 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfn_cfg\n", __FUNCTION__));
+		goto exit;
+	}
+exit:
+	return err;
+}
+static int
+_dhd_pno_reinitialize_prof(dhd_pub_t *dhd, dhd_pno_params_t *params, dhd_pno_mode_t mode)
+{
+	int err = BCME_OK;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL\n", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL\n", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	mutex_lock(&_pno_state->pno_mutex);
+	switch (mode) {
+	case DHD_PNO_LEGACY_MODE: {
+		struct dhd_pno_ssid *iter, *next;
+		if (params->params_legacy.nssid > 0) {
+			list_for_each_entry_safe(iter, next,
+				&params->params_legacy.ssid_list, list) {
+				list_del(&iter->list);
+				kfree(iter);
+			}
+		}
+		params->params_legacy.scan_fr = 0;
+		params->params_legacy.pno_freq_expo_max = 0;
+		params->params_legacy.pno_repeat = 0;
+		params->params_legacy.nchan = 0;
+		memset(params->params_legacy.chan_list, 0,
+			sizeof(params->params_legacy.chan_list));
+		break;
+	}
+	case DHD_PNO_BATCH_MODE: {
+		params->params_batch.scan_fr = 0;
+		params->params_batch.mscan = 0;
+		params->params_batch.nchan = 0;
+		params->params_batch.rtt = 0;
+		params->params_batch.bestn = 0;
+		params->params_batch.nchan = 0;
+		params->params_batch.band = WLC_BAND_AUTO;
+		memset(params->params_batch.chan_list, 0,
+			sizeof(params->params_batch.chan_list));
+		params->params_batch.get_batch.batch_started = FALSE;
+		params->params_batch.get_batch.buf = NULL;
+		params->params_batch.get_batch.bufsize = 0;
+		params->params_batch.get_batch.reason = 0;
+		_dhd_pno_clear_all_batch_results(dhd,
+			&params->params_batch.get_batch.scan_results_list, FALSE);
+		_dhd_pno_clear_all_batch_results(dhd,
+			&params->params_batch.get_batch.expired_scan_results_list, FALSE);
+		params->params_batch.get_batch.tot_scan_cnt = 0;
+		params->params_batch.get_batch.expired_tot_scan_cnt = 0;
+		params->params_batch.get_batch.top_node_cnt = 0;
+		INIT_LIST_HEAD(&params->params_batch.get_batch.scan_results_list);
+		INIT_LIST_HEAD(&params->params_batch.get_batch.expired_scan_results_list);
+		break;
+	}
+	case DHD_PNO_HOTLIST_MODE: {
+		struct dhd_pno_bssid *iter, *next;
+		if (params->params_hotlist.nbssid > 0) {
+			list_for_each_entry_safe(iter, next,
+				&params->params_hotlist.bssid_list, list) {
+				list_del(&iter->list);
+				kfree(iter);
+			}
+		}
+		params->params_hotlist.scan_fr = 0;
+		params->params_hotlist.nbssid = 0;
+		params->params_hotlist.nchan = 0;
+		params->params_batch.band = WLC_BAND_AUTO;
+		memset(params->params_hotlist.chan_list, 0,
+			sizeof(params->params_hotlist.chan_list));
+		break;
+	}
+	default:
+		DHD_ERROR(("%s : unknown mode : %d\n", __FUNCTION__, mode));
+		break;
+	}
+	mutex_unlock(&_pno_state->pno_mutex);
+	return err;
+}
+static int
+_dhd_pno_add_bssid(dhd_pub_t *dhd, wl_pfn_bssid_t *p_pfn_bssid, int nbssid)
+{
+	int err = BCME_OK;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	if (nbssid) {
+		NULL_CHECK(p_pfn_bssid, "bssid list is NULL", err);
+	}
+	err = dhd_iovar(dhd, 0, "pfn_add_bssid", (char *)&p_pfn_bssid,
+		sizeof(wl_pfn_bssid_t) * nbssid, 1);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to execute pfn_cfg\n", __FUNCTION__));
+		goto exit;
+	}
+exit:
+	return err;
+}
+int
+dhd_pno_stop_for_ssid(dhd_pub_t *dhd)
+{
+	int err = BCME_OK;
+	uint32 mode = 0;
+	dhd_pno_status_info_t *_pno_state;
+	dhd_pno_params_t *_params;
+	wl_pfn_bssid_t *p_pfn_bssid;
+	NULL_CHECK(dhd, "dev is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	if (!(_pno_state->pno_mode & DHD_PNO_LEGACY_MODE)) {
+		DHD_ERROR(("%s : LEGACY PNO MODE is not enabled\n", __FUNCTION__));
+		goto exit;
+	}
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+	/* restart Batch mode  if the batch mode is on */
+	if (_pno_state->pno_mode & (DHD_PNO_BATCH_MODE | DHD_PNO_HOTLIST_MODE)) {
+		/* retrieve the batching data from firmware into host */
+		dhd_pno_get_for_batch(dhd, NULL, 0, PNO_STATUS_DISABLE);
+		/* save current pno_mode before calling dhd_pno_clean */
+		mode = _pno_state->pno_mode;
+		_dhd_pno_clean(dhd);
+		/* restore previous pno_mode */
+		_pno_state->pno_mode = mode;
+		if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
+			_params = &(_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS]);
+			/* restart BATCH SCAN */
+			err = dhd_pno_set_for_batch(dhd, &_params->params_batch);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_BATCH_MODE;
+				DHD_ERROR(("%s : failed to restart batch scan(err: %d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
+			/* restart HOTLIST SCAN */
+			struct dhd_pno_bssid *iter, *next;
+			_params = &(_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS]);
+			p_pfn_bssid = kzalloc(sizeof(wl_pfn_bssid_t) *
+			_params->params_hotlist.nbssid, GFP_KERNEL);
+			if (p_pfn_bssid == NULL) {
+				DHD_ERROR(("%s : failed to allocate wl_pfn_bssid_t array"
+				" (count: %d)",
+					__FUNCTION__, _params->params_hotlist.nbssid));
+				err = BCME_ERROR;
+				_pno_state->pno_mode &= ~DHD_PNO_HOTLIST_MODE;
+				goto exit;
+			}
+			/* convert dhd_pno_bssid to wl_pfn_bssid */
+			list_for_each_entry_safe(iter, next,
+			&_params->params_hotlist.bssid_list, list) {
+				memcpy(&p_pfn_bssid->macaddr,
+				&iter->macaddr, ETHER_ADDR_LEN);
+				p_pfn_bssid->flags = iter->flags;
+				p_pfn_bssid++;
+			}
+			err = dhd_pno_set_for_hotlist(dhd, p_pfn_bssid, &_params->params_hotlist);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_HOTLIST_MODE;
+				DHD_ERROR(("%s : failed to restart hotlist scan(err: %d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		}
+	} else {
+		err = _dhd_pno_clean(dhd);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_clean (err: %d)\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+exit:
+	return err;
+}
+
+int
+dhd_pno_enable(dhd_pub_t *dhd, int enable)
+{
+	int err = BCME_OK;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	return (_dhd_pno_enable(dhd, enable));
+}
+
+int
+dhd_pno_set_for_ssid(dhd_pub_t *dhd, wlc_ssid_t* ssid_list, int nssid,
+	uint16  scan_fr, int pno_repeat, int pno_freq_expo_max, uint16 *channel_list, int nchan)
+{
+	struct dhd_pno_ssid *_pno_ssid;
+	dhd_pno_params_t *_params;
+	dhd_pno_params_t *_params2;
+	dhd_pno_status_info_t *_pno_state;
+	uint16 _chan_list[WL_NUMCHANNELS];
+	int32 tot_nchan = 0;
+	int err = BCME_OK;
+	int i;
+	int mode = 0;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	DHD_PNO(("%s enter : scan_fr :%d, pno_repeat :%d,"
+			"pno_freq_expo_max: %d, nchan :%d\n", __FUNCTION__,
+			scan_fr, pno_repeat, pno_freq_expo_max, nchan));
+
+	_params = &(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS]);
+	if (!(_pno_state->pno_mode & DHD_PNO_LEGACY_MODE)) {
+		_pno_state->pno_mode |= DHD_PNO_LEGACY_MODE;
+		err = _dhd_pno_reinitialize_prof(dhd, _params, DHD_PNO_LEGACY_MODE);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to reinitialize profile (err %d)\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+	memset(_chan_list, 0, sizeof(_chan_list));
+	tot_nchan = nchan;
+	if (tot_nchan > 0 && channel_list) {
+		for (i = 0; i < nchan; i++)
+		_params->params_legacy.chan_list[i] = _chan_list[i] = channel_list[i];
+	}
+	if (_pno_state->pno_mode & (DHD_PNO_BATCH_MODE | DHD_PNO_HOTLIST_MODE)) {
+		DHD_PNO(("BATCH SCAN is on progress in firmware\n"));
+		/* retrieve the batching data from firmware into host */
+		dhd_pno_get_for_batch(dhd, NULL, 0, PNO_STATUS_DISABLE);
+		/* store current pno_mode before disabling pno */
+		mode = _pno_state->pno_mode;
+		err = _dhd_pno_enable(dhd, PNO_OFF);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to disable PNO\n", __FUNCTION__));
+			goto exit;
+		}
+		/* restore the previous mode */
+		_pno_state->pno_mode = mode;
+		/* use superset of channel list between two mode */
+		if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
+			_params2 = &(_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS]);
+			if (_params2->params_batch.nchan > 0 && nchan > 0) {
+				err = _dhd_pno_chan_merge(_chan_list, &tot_nchan,
+					&_params2->params_batch.chan_list[0],
+					_params2->params_batch.nchan,
+					&channel_list[0], nchan);
+				if (err < 0) {
+					DHD_ERROR(("%s : failed to merge channel list"
+					" between legacy and batch\n",
+						__FUNCTION__));
+					goto exit;
+				}
+			}  else {
+				DHD_PNO(("superset channel will use"
+				" all channels in firmware\n"));
+			}
+		} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
+			_params2 = &(_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS]);
+			if (_params2->params_hotlist.nchan > 0 && nchan > 0) {
+				err = _dhd_pno_chan_merge(_chan_list, &tot_nchan,
+					&_params2->params_hotlist.chan_list[0],
+					_params2->params_hotlist.nchan,
+					&channel_list[0], nchan);
+				if (err < 0) {
+					DHD_ERROR(("%s : failed to merge channel list"
+					" between legacy and hotlist\n",
+						__FUNCTION__));
+					goto exit;
+				}
+			}
+		}
+	}
+	_params->params_legacy.scan_fr = scan_fr;
+	_params->params_legacy.pno_repeat = pno_repeat;
+	_params->params_legacy.pno_freq_expo_max = pno_freq_expo_max;
+	_params->params_legacy.nchan = nchan;
+	_params->params_legacy.nssid = nssid;
+	INIT_LIST_HEAD(&_params->params_legacy.ssid_list);
+	if ((err = _dhd_pno_set(dhd, _params, DHD_PNO_LEGACY_MODE)) < 0) {
+		DHD_ERROR(("failed to set call pno_set (err %d) in firmware\n", err));
+		goto exit;
+	}
+	if ((err = _dhd_pno_add_ssid(dhd, ssid_list, nssid)) < 0) {
+		DHD_ERROR(("failed to add ssid list (err %d) in firmware\n", err));
+		goto exit;
+	}
+	for (i = 0; i < nssid; i++) {
+		_pno_ssid = kzalloc(sizeof(struct dhd_pno_ssid), GFP_KERNEL);
+		if (_pno_ssid == NULL) {
+			DHD_ERROR(("%s : failed to allocate struct dhd_pno_ssid\n",
+				__FUNCTION__));
+			goto exit;
+		}
+		_pno_ssid->SSID_len = ssid_list[i].SSID_len;
+		memcpy(_pno_ssid->SSID, ssid_list[i].SSID, _pno_ssid->SSID_len);
+		list_add_tail(&_pno_ssid->list, &_params->params_legacy.ssid_list);
+
+	}
+	if (tot_nchan > 0) {
+		if ((err = _dhd_pno_cfg(dhd, _chan_list, tot_nchan)) < 0) {
+			DHD_ERROR(("%s : failed to set call pno_cfg (err %d) in firmware\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+	if (_pno_state->pno_status == DHD_PNO_DISABLED) {
+		if ((err = _dhd_pno_enable(dhd, PNO_ON)) < 0)
+			DHD_ERROR(("%s : failed to enable PNO\n", __FUNCTION__));
+	}
+exit:
+	/* clear mode in case of error */
+	if (err < 0)
+		_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+	return err;
+}
+int
+dhd_pno_set_for_batch(dhd_pub_t *dhd, struct dhd_pno_batch_params *batch_params)
+{
+	int err = BCME_OK;
+	uint16 _chan_list[WL_NUMCHANNELS];
+	int rem_nchan = 0, tot_nchan = 0;
+	int mode = 0, mscan = 0;
+	int i = 0;
+	dhd_pno_params_t *_params;
+	dhd_pno_params_t *_params2;
+	dhd_pno_status_info_t *_pno_state;
+	wlc_ssid_t *p_ssid_list = NULL;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	NULL_CHECK(batch_params, "batch_params is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n", __FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	_params = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS];
+	if (!(_pno_state->pno_mode & DHD_PNO_BATCH_MODE)) {
+		_pno_state->pno_mode |= DHD_PNO_BATCH_MODE;
+		err = _dhd_pno_reinitialize_prof(dhd, _params, DHD_PNO_BATCH_MODE);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_reinitialize_prof\n",
+				__FUNCTION__));
+			goto exit;
+		}
+	}
+	_params->params_batch.scan_fr = batch_params->scan_fr;
+	_params->params_batch.bestn = batch_params->bestn;
+	_params->params_batch.mscan = (batch_params->mscan)?
+		batch_params->mscan : DEFAULT_BATCH_MSCAN;
+	_params->params_batch.nchan = batch_params->nchan;
+	memcpy(_params->params_batch.chan_list, batch_params->chan_list,
+		sizeof(_params->params_batch.chan_list));
+
+	memset(_chan_list, 0, sizeof(_chan_list));
+
+	rem_nchan = ARRAYSIZE(batch_params->chan_list) - batch_params->nchan;
+	if (batch_params->band == WLC_BAND_2G || batch_params->band == WLC_BAND_5G) {
+		/* get a valid channel list based on band B or A */
+		err = _dhd_pno_get_channels(dhd,
+		&_params->params_batch.chan_list[batch_params->nchan],
+		&rem_nchan, batch_params->band, FALSE);
+		if (err < 0) {
+			DHD_ERROR(("%s: failed to get valid channel list(band : %d)\n",
+				__FUNCTION__, batch_params->band));
+			goto exit;
+		}
+		/* now we need to update nchan because rem_chan has valid channel count */
+		_params->params_batch.nchan += rem_nchan;
+		/* need to sort channel list */
+		sort(_params->params_batch.chan_list, _params->params_batch.nchan,
+			sizeof(_params->params_batch.chan_list[0]), _dhd_pno_cmpfunc, NULL);
+	}
+#ifdef PNO_DEBUG
+{
+		DHD_PNO(("Channel list : "));
+		for (i = 0; i < _params->params_batch.nchan; i++) {
+			DHD_PNO(("%d ", _params->params_batch.chan_list[i]));
+		}
+		DHD_PNO(("\n"));
+}
+#endif
+	if (_params->params_batch.nchan) {
+		/* copy the channel list into local array */
+		memcpy(_chan_list, _params->params_batch.chan_list, sizeof(_chan_list));
+		tot_nchan = _params->params_batch.nchan;
+	}
+	if (_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) {
+		struct dhd_pno_ssid *iter, *next;
+		DHD_PNO(("PNO SSID is on progress in firmware\n"));
+		/* store current pno_mode before disabling pno */
+		mode = _pno_state->pno_mode;
+		err = _dhd_pno_enable(dhd, PNO_OFF);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to disable PNO\n", __FUNCTION__));
+			goto exit;
+		}
+		/* restore the previous mode */
+		_pno_state->pno_mode = mode;
+		/* Use the superset for channelist between two mode */
+		_params2 = &(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS]);
+		if (_params2->params_legacy.nchan > 0 && _params->params_batch.nchan > 0) {
+			err = _dhd_pno_chan_merge(_chan_list, &tot_nchan,
+				&_params2->params_legacy.chan_list[0],
+				_params2->params_legacy.nchan,
+				&_params->params_batch.chan_list[0], _params->params_batch.nchan);
+			if (err < 0) {
+				DHD_ERROR(("%s : failed to merge channel list"
+				" between legacy and batch\n",
+					__FUNCTION__));
+				goto exit;
+			}
+		} else {
+			DHD_PNO(("superset channel will use all channels in firmware\n"));
+		}
+		p_ssid_list = kzalloc(sizeof(wlc_ssid_t) *
+							_params2->params_legacy.nssid, GFP_KERNEL);
+		if (p_ssid_list == NULL) {
+			DHD_ERROR(("%s : failed to allocate wlc_ssid_t array (count: %d)",
+				__FUNCTION__, _params2->params_legacy.nssid));
+			err = BCME_ERROR;
+			_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+			goto exit;
+		}
+		i = 0;
+		/* convert dhd_pno_ssid to dhd_pno_ssid */
+		list_for_each_entry_safe(iter, next, &_params2->params_legacy.ssid_list, list) {
+			p_ssid_list[i].SSID_len = iter->SSID_len;
+			memcpy(p_ssid_list->SSID, iter->SSID, p_ssid_list[i].SSID_len);
+			i++;
+		}
+		if ((err = _dhd_pno_add_ssid(dhd, p_ssid_list,
+			_params2->params_legacy.nssid)) < 0) {
+			DHD_ERROR(("failed to add ssid list (err %d) in firmware\n", err));
+			goto exit;
+		}
+	}
+	if ((err = _dhd_pno_set(dhd, _params, DHD_PNO_BATCH_MODE)) < 0) {
+		DHD_ERROR(("%s : failed to set call pno_set (err %d) in firmware\n",
+			__FUNCTION__, err));
+		goto exit;
+	} else {
+		/* we need to return mscan */
+		mscan = err;
+	}
+	if (tot_nchan > 0) {
+		if ((err = _dhd_pno_cfg(dhd, _chan_list, tot_nchan)) < 0) {
+			DHD_ERROR(("%s : failed to set call pno_cfg (err %d) in firmware\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+	if (_pno_state->pno_status == DHD_PNO_DISABLED) {
+		if ((err = _dhd_pno_enable(dhd, PNO_ON)) < 0)
+			DHD_ERROR(("%s : failed to enable PNO\n", __FUNCTION__));
+	}
+exit:
+	/* clear mode in case of error */
+	if (err < 0)
+		_pno_state->pno_mode &= ~DHD_PNO_BATCH_MODE;
+	else {
+		/* return #max scan firmware can do */
+		err = mscan;
+	}
+	if (p_ssid_list)
+		kfree(p_ssid_list);
+	return err;
+}
+
+static int
+_dhd_pno_get_for_batch(dhd_pub_t *dhd, char *buf, int bufsize, int reason)
+{
+	int err = BCME_OK;
+	int i, j;
+	uint32 timestamp = 0;
+	dhd_pno_params_t *_params = NULL;
+	dhd_pno_status_info_t *_pno_state = NULL;
+	wl_pfn_lscanresults_t *plbestnet = NULL;
+	wl_pfn_lnet_info_t *plnetinfo;
+	dhd_pno_bestnet_entry_t *pbestnet_entry;
+	dhd_pno_best_header_t *pbestnetheader = NULL;
+	dhd_pno_scan_results_t *pscan_results = NULL, *siter, *snext;
+	bool allocate_header = FALSE;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n", __FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	if (!(_pno_state->pno_mode & DHD_PNO_BATCH_MODE)) {
+		DHD_ERROR(("%s: Batching SCAN mode is not enabled\n", __FUNCTION__));
+		goto exit;
+	}
+	mutex_lock(&_pno_state->pno_mutex);
+	_params = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS];
+	if (buf && bufsize) {
+		if (!list_empty(&_params->params_batch.get_batch.expired_scan_results_list)) {
+			/* need to check whether we have cashed data or not */
+			DHD_PNO(("%s: have cashed batching data in Driver\n",
+				__FUNCTION__));
+			/* convert to results format */
+			goto convert_format;
+		} else {
+			/* this is a first try to get batching results */
+			if (!list_empty(&_params->params_batch.get_batch.scan_results_list)) {
+				/* move the scan_results_list to expired_scan_results_lists */
+				list_for_each_entry_safe(siter, snext,
+					&_params->params_batch.get_batch.scan_results_list, list) {
+					list_move_tail(&siter->list,
+					&_params->params_batch.get_batch.expired_scan_results_list);
+				}
+				_params->params_batch.get_batch.top_node_cnt = 0;
+				_params->params_batch.get_batch.expired_tot_scan_cnt =
+					_params->params_batch.get_batch.tot_scan_cnt;
+				_params->params_batch.get_batch.tot_scan_cnt = 0;
+				goto convert_format;
+			}
+		}
+	}
+	/* create dhd_pno_scan_results_t whenever we got event WLC_E_PFN_BEST_BATCHING */
+	pscan_results = (dhd_pno_scan_results_t *)MALLOC(dhd->osh, SCAN_RESULTS_SIZE);
+	if (pscan_results == NULL) {
+		err = BCME_NOMEM;
+		DHD_ERROR(("failed to allocate dhd_pno_scan_results_t\n"));
+		goto exit;
+	}
+	pscan_results->bestnetheader = NULL;
+	pscan_results->cnt_header = 0;
+	/* add the element into list unless total node cnt is less than MAX_NODE_ CNT */
+	if (_params->params_batch.get_batch.top_node_cnt < MAX_NODE_CNT) {
+		list_add(&pscan_results->list, &_params->params_batch.get_batch.scan_results_list);
+		_params->params_batch.get_batch.top_node_cnt++;
+	} else {
+		int _removed_scan_cnt;
+		/* remove oldest one and add new one */
+		DHD_PNO(("%s : Remove oldest node and add new one\n", __FUNCTION__));
+		_removed_scan_cnt = _dhd_pno_clear_all_batch_results(dhd,
+			&_params->params_batch.get_batch.scan_results_list, TRUE);
+		_params->params_batch.get_batch.tot_scan_cnt -= _removed_scan_cnt;
+		list_add(&pscan_results->list, &_params->params_batch.get_batch.scan_results_list);
+
+	}
+	plbestnet = (wl_pfn_lscanresults_t *)MALLOC(dhd->osh, PNO_BESTNET_LEN);
+	NULL_CHECK(plbestnet, "failed to allocate buffer for bestnet", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	memset(plbestnet, 0, PNO_BESTNET_LEN);
+	while (plbestnet->status != PFN_COMPLETE) {
+		memset(plbestnet, 0, PNO_BESTNET_LEN);
+		err = dhd_iovar(dhd, 0, "pfnlbest", (char *)plbestnet, PNO_BESTNET_LEN, 0);
+		if (err < 0) {
+			if (err == BCME_EPERM) {
+				DHD_ERROR(("we cannot get the batching data "
+					"during scanning in firmware, try again\n,"));
+				msleep(500);
+				continue;
+			} else {
+				DHD_ERROR(("%s : failed to execute pfnlbest (err :%d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		}
+		DHD_PNO(("ver %d, status : %d, count %d\n", plbestnet->version,
+			plbestnet->status, plbestnet->count));
+		if (plbestnet->version != PFN_LSCANRESULT_VERSION) {
+			err = BCME_VERSION;
+			DHD_ERROR(("bestnet version(%d) is mismatch with Driver version(%d)\n",
+				plbestnet->version, PFN_LSCANRESULT_VERSION));
+			goto exit;
+		}
+		plnetinfo = plbestnet->netinfo;
+		for (i = 0; i < plbestnet->count; i++) {
+			pbestnet_entry = (dhd_pno_bestnet_entry_t *)
+			MALLOC(dhd->osh, BESTNET_ENTRY_SIZE);
+			if (pbestnet_entry == NULL) {
+				err = BCME_NOMEM;
+				DHD_ERROR(("failed to allocate dhd_pno_bestnet_entry\n"));
+				goto exit;
+			}
+			pbestnet_entry->recorded_time = jiffies; /* record the current time */
+			/* create header for the first entry */
+			allocate_header = (i == 0)? TRUE : FALSE;
+			/* check whether the new generation is started or not */
+			if (timestamp && (TIME_DIFF(timestamp, plnetinfo->timestamp)
+				> TIME_MIN_DIFF))
+				allocate_header = TRUE;
+			timestamp = plnetinfo->timestamp;
+			if (allocate_header) {
+				pbestnetheader = (dhd_pno_best_header_t *)
+				MALLOC(dhd->osh, BEST_HEADER_SIZE);
+				if (pbestnetheader == NULL) {
+					err = BCME_NOMEM;
+					if (pbestnet_entry)
+						MFREE(dhd->osh, pbestnet_entry,
+						BESTNET_ENTRY_SIZE);
+					DHD_ERROR(("failed to allocate dhd_pno_bestnet_entry\n"));
+					goto exit;
+				}
+				/* increase total cnt of bestnet header */
+				pscan_results->cnt_header++;
+				/* need to record the reason to call dhd_pno_get_for_bach */
+				if (reason)
+					pbestnetheader->reason = (ENABLE << reason);
+				memset(pbestnetheader, 0, BEST_HEADER_SIZE);
+				/* initialize the head of linked list */
+				INIT_LIST_HEAD(&(pbestnetheader->entry_list));
+				/* link the pbestnet heaer into existed list */
+				if (pscan_results->bestnetheader == NULL)
+					/* In case of header */
+					pscan_results->bestnetheader = pbestnetheader;
+				else {
+					dhd_pno_best_header_t *head = pscan_results->bestnetheader;
+					pscan_results->bestnetheader = pbestnetheader;
+					pbestnetheader->next = head;
+				}
+			}
+			/* fills the best network info */
+			pbestnet_entry->channel = plnetinfo->pfnsubnet.channel;
+			pbestnet_entry->RSSI = plnetinfo->RSSI;
+			if (pbestnet_entry->RSSI > 0) {
+				/* if RSSI is positive value, we assume that
+				 * this scan is aborted by other scan
+				 */
+				pbestnet_entry->RSSI *= -1;
+				pbestnetheader->reason = (ENABLE << PNO_STATUS_ABORT);
+			}
+			pbestnet_entry->rtt0 = plnetinfo->rtt0;
+			pbestnet_entry->rtt1 = plnetinfo->rtt1;
+			pbestnet_entry->timestamp = plnetinfo->timestamp;
+			pbestnet_entry->SSID_len = plnetinfo->pfnsubnet.SSID_len;
+			memcpy(pbestnet_entry->SSID, plnetinfo->pfnsubnet.SSID,
+				pbestnet_entry->SSID_len);
+			memcpy(&pbestnet_entry->BSSID, &plnetinfo->pfnsubnet.BSSID, ETHER_ADDR_LEN);
+			/* add the element into list */
+			list_add_tail(&pbestnet_entry->list, &pbestnetheader->entry_list);
+			/* increase best entry count */
+			pbestnetheader->tot_cnt++;
+			pbestnetheader->tot_size += BESTNET_ENTRY_SIZE;
+			DHD_PNO(("Header %d\n", pscan_results->cnt_header - 1));
+			DHD_PNO(("\tSSID : "));
+			for (j = 0; j < plnetinfo->pfnsubnet.SSID_len; j++)
+				DHD_PNO(("%c", plnetinfo->pfnsubnet.SSID[j]));
+			DHD_PNO(("\n"));
+			DHD_PNO(("\tBSSID: %02x:%02x:%02x:%02x:%02x:%02x\n",
+				plnetinfo->pfnsubnet.BSSID.octet[0],
+				plnetinfo->pfnsubnet.BSSID.octet[1],
+				plnetinfo->pfnsubnet.BSSID.octet[2],
+				plnetinfo->pfnsubnet.BSSID.octet[3],
+				plnetinfo->pfnsubnet.BSSID.octet[4],
+				plnetinfo->pfnsubnet.BSSID.octet[5]));
+			DHD_PNO(("\tchannel: %d, RSSI: %d, timestamp: %d ms\n",
+				plnetinfo->pfnsubnet.channel,
+				plnetinfo->RSSI, plnetinfo->timestamp));
+			DHD_PNO(("\tRTT0 : %d, RTT1: %d\n", plnetinfo->rtt0, plnetinfo->rtt1));
+			plnetinfo++;
+		}
+	}
+	/* increase total scan count using current scan count */
+	_params->params_batch.get_batch.tot_scan_cnt += pscan_results->cnt_header;
+
+	if (buf && bufsize) {
+		/* This is a first try to get batching results */
+		if (!list_empty(&_params->params_batch.get_batch.scan_results_list)) {
+			/* move the scan_results_list to expired_scan_results_lists */
+			list_for_each_entry_safe(siter, snext,
+				&_params->params_batch.get_batch.scan_results_list, list) {
+				list_move_tail(&siter->list,
+					&_params->params_batch.get_batch.expired_scan_results_list);
+			}
+			/* reset gloval values after  moving to expired list */
+			_params->params_batch.get_batch.top_node_cnt = 0;
+			_params->params_batch.get_batch.expired_tot_scan_cnt =
+				_params->params_batch.get_batch.tot_scan_cnt;
+			_params->params_batch.get_batch.tot_scan_cnt = 0;
+		}
+convert_format:
+		if (!list_empty(&_params->params_batch.get_batch.expired_scan_results_list)) {
+			err = _dhd_pno_convert_format(dhd, &_params->params_batch, buf, bufsize);
+			if (err < 0) {
+				DHD_ERROR(("failed to convert the data into upper layer format\n"));
+				goto exit;
+			}
+		}
+	}
+exit:
+	if (plbestnet)
+		MFREE(dhd->osh, plbestnet, PNO_BESTNET_LEN);
+	_params->params_batch.get_batch.buf = NULL;
+	_params->params_batch.get_batch.bufsize = 0;
+	mutex_unlock(&_pno_state->pno_mutex);
+	complete(&_pno_state->get_batch_done);
+	return err;
+}
+static void
+_dhd_pno_get_batch_handler(struct work_struct *work)
+{
+	dhd_pno_status_info_t *_pno_state;
+	dhd_pub_t *dhd;
+	struct dhd_pno_batch_params *params_batch;
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	_pno_state = container_of(work, struct dhd_pno_status_info, work);
+	dhd = _pno_state->dhd;
+	if (dhd == NULL) {
+		DHD_ERROR(("%s : dhd is NULL\n", __FUNCTION__));
+		return;
+	}
+	params_batch = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS].params_batch;
+	_dhd_pno_get_for_batch(dhd, params_batch->get_batch.buf,
+		params_batch->get_batch.bufsize, params_batch->get_batch.reason);
+
+}
+
+int
+dhd_pno_get_for_batch(dhd_pub_t *dhd, char *buf, int bufsize, int reason)
+{
+	int err = BCME_OK;
+	dhd_pno_status_info_t *_pno_state;
+	struct dhd_pno_batch_params *params_batch;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n", __FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	params_batch = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS].params_batch;
+	if (!(_pno_state->pno_mode & DHD_PNO_BATCH_MODE)) {
+		DHD_ERROR(("%s: Batching SCAN mode is not enabled\n", __FUNCTION__));
+		goto exit;
+	}
+	params_batch->get_batch.buf = buf;
+	params_batch->get_batch.bufsize = bufsize;
+	params_batch->get_batch.reason = reason;
+	schedule_work(&_pno_state->work);
+	wait_for_completion(&_pno_state->get_batch_done);
+exit:
+	return err;
+}
+
+int
+dhd_pno_stop_for_batch(dhd_pub_t *dhd)
+{
+	int err = BCME_OK;
+	int mode = 0;
+	int i = 0;
+	dhd_pno_status_info_t *_pno_state;
+	dhd_pno_params_t *_params;
+	wl_pfn_bssid_t *p_pfn_bssid;
+	wlc_ssid_t *p_ssid_list = NULL;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n",
+			__FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	if (!(_pno_state->pno_mode & DHD_PNO_BATCH_MODE)) {
+		DHD_ERROR(("%s : PNO BATCH MODE is not enabled\n", __FUNCTION__));
+		goto exit;
+	}
+	_pno_state->pno_mode &= ~DHD_PNO_BATCH_MODE;
+	if (_pno_state->pno_mode & (DHD_PNO_LEGACY_MODE | DHD_PNO_HOTLIST_MODE)) {
+		mode = _pno_state->pno_mode;
+		_dhd_pno_clean(dhd);
+		_pno_state->pno_mode = mode;
+		/* restart Legacy PNO if the Legacy PNO is on */
+		if (_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) {
+			struct dhd_pno_legacy_params *_params_legacy;
+			struct dhd_pno_ssid *iter, *next;
+			_params_legacy =
+				&(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS].params_legacy);
+			p_ssid_list = kzalloc(sizeof(wlc_ssid_t) *
+				_params_legacy->nssid, GFP_KERNEL);
+			if (p_ssid_list == NULL) {
+				DHD_ERROR(("%s : failed to allocate wlc_ssid_t array (count: %d)",
+					__FUNCTION__, _params_legacy->nssid));
+				err = BCME_ERROR;
+				_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+				goto exit;
+			}
+			i = 0;
+			/* convert dhd_pno_ssid to dhd_pno_ssid */
+			list_for_each_entry_safe(iter, next, &_params_legacy->ssid_list, list) {
+				p_ssid_list[i].SSID_len = iter->SSID_len;
+				memcpy(p_ssid_list[i].SSID, iter->SSID, p_ssid_list[i].SSID_len);
+				i++;
+			}
+			err = dhd_pno_set_for_ssid(dhd, p_ssid_list, _params_legacy->nssid,
+				_params_legacy->scan_fr, _params_legacy->pno_repeat,
+				_params_legacy->pno_freq_expo_max, _params_legacy->chan_list,
+				_params_legacy->nchan);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+				DHD_ERROR(("%s : failed to restart legacy PNO scan(err: %d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		} else if (_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE) {
+			struct dhd_pno_bssid *iter, *next;
+			_params = &(_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS]);
+			p_pfn_bssid = kzalloc(sizeof(wl_pfn_bssid_t) *
+				_params->params_hotlist.nbssid, GFP_KERNEL);
+			if (p_pfn_bssid == NULL) {
+				DHD_ERROR(("%s : failed to allocate wl_pfn_bssid_t array"
+					" (count: %d)",
+					__FUNCTION__, _params->params_hotlist.nbssid));
+				err = BCME_ERROR;
+				_pno_state->pno_mode &= ~DHD_PNO_HOTLIST_MODE;
+				goto exit;
+			}
+			i = 0;
+			/* convert dhd_pno_bssid to wl_pfn_bssid */
+			list_for_each_entry_safe(iter, next,
+				&_params->params_hotlist.bssid_list, list) {
+				memcpy(&p_pfn_bssid[i].macaddr, &iter->macaddr, ETHER_ADDR_LEN);
+				p_pfn_bssid[i].flags = iter->flags;
+				i++;
+			}
+			err = dhd_pno_set_for_hotlist(dhd, p_pfn_bssid, &_params->params_hotlist);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_HOTLIST_MODE;
+				DHD_ERROR(("%s : failed to restart hotlist scan(err: %d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		}
+	} else {
+		err = _dhd_pno_clean(dhd);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_clean (err: %d)\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+exit:
+	_params = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS];
+	_dhd_pno_reinitialize_prof(dhd, _params, DHD_PNO_BATCH_MODE);
+	if (p_ssid_list)
+		kfree(p_ssid_list);
+	return err;
+}
+
+int
+dhd_pno_set_for_hotlist(dhd_pub_t *dhd, wl_pfn_bssid_t *p_pfn_bssid,
+	struct dhd_pno_hotlist_params *hotlist_params)
+{
+	int err = BCME_OK;
+	int i;
+	uint16 _chan_list[WL_NUMCHANNELS];
+	int rem_nchan = 0;
+	int tot_nchan = 0;
+	int mode = 0;
+	dhd_pno_params_t *_params;
+	dhd_pno_params_t *_params2;
+	struct dhd_pno_bssid *_pno_bssid;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	NULL_CHECK(hotlist_params, "hotlist_params is NULL", err);
+	NULL_CHECK(p_pfn_bssid, "p_pfn_bssid is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+
+	if (!dhd_support_sta_mode(dhd)) {
+		err = BCME_BADOPTION;
+		goto exit;
+	}
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n", __FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	_params = &_pno_state->pno_params_arr[INDEX_OF_HOTLIST_PARAMS];
+	if (!(_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE)) {
+		_pno_state->pno_mode |= DHD_PNO_HOTLIST_MODE;
+		err = _dhd_pno_reinitialize_prof(dhd, _params, DHD_PNO_HOTLIST_MODE);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_reinitialize_prof\n",
+				__FUNCTION__));
+			goto exit;
+		}
+	}
+	_params->params_batch.nchan = hotlist_params->nchan;
+	_params->params_batch.scan_fr = hotlist_params->scan_fr;
+	if (hotlist_params->nchan)
+		memcpy(_params->params_hotlist.chan_list, hotlist_params->chan_list,
+			sizeof(_params->params_hotlist.chan_list));
+	memset(_chan_list, 0, sizeof(_chan_list));
+
+	rem_nchan = ARRAYSIZE(hotlist_params->chan_list) - hotlist_params->nchan;
+	if (hotlist_params->band == WLC_BAND_2G || hotlist_params->band == WLC_BAND_5G) {
+		/* get a valid channel list based on band B or A */
+		err = _dhd_pno_get_channels(dhd,
+		&_params->params_hotlist.chan_list[hotlist_params->nchan],
+		&rem_nchan, hotlist_params->band, FALSE);
+		if (err < 0) {
+			DHD_ERROR(("%s: failed to get valid channel list(band : %d)\n",
+				__FUNCTION__, hotlist_params->band));
+			goto exit;
+		}
+		/* now we need to update nchan because rem_chan has valid channel count */
+		_params->params_hotlist.nchan += rem_nchan;
+		/* need to sort channel list */
+		sort(_params->params_hotlist.chan_list, _params->params_hotlist.nchan,
+			sizeof(_params->params_hotlist.chan_list[0]), _dhd_pno_cmpfunc, NULL);
+	}
+#ifdef PNO_DEBUG
+{
+		int i;
+		DHD_PNO(("Channel list : "));
+		for (i = 0; i < _params->params_batch.nchan; i++) {
+			DHD_PNO(("%d ", _params->params_batch.chan_list[i]));
+		}
+		DHD_PNO(("\n"));
+}
+#endif
+	if (_params->params_hotlist.nchan) {
+		/* copy the channel list into local array */
+		memcpy(_chan_list, _params->params_hotlist.chan_list,
+			sizeof(_chan_list));
+		tot_nchan = _params->params_hotlist.nchan;
+	}
+	if (_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) {
+			DHD_PNO(("PNO SSID is on progress in firmware\n"));
+			/* store current pno_mode before disabling pno */
+			mode = _pno_state->pno_mode;
+			err = _dhd_pno_enable(dhd, PNO_OFF);
+			if (err < 0) {
+				DHD_ERROR(("%s : failed to disable PNO\n", __FUNCTION__));
+				goto exit;
+			}
+			/* restore the previous mode */
+			_pno_state->pno_mode = mode;
+			/* Use the superset for channelist between two mode */
+			_params2 = &(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS]);
+			if (_params2->params_legacy.nchan > 0 &&
+				_params->params_hotlist.nchan > 0) {
+				err = _dhd_pno_chan_merge(_chan_list, &tot_nchan,
+					&_params2->params_legacy.chan_list[0],
+					_params2->params_legacy.nchan,
+					&_params->params_hotlist.chan_list[0],
+					_params->params_hotlist.nchan);
+				if (err < 0) {
+					DHD_ERROR(("%s : failed to merge channel list"
+						"between legacy and hotlist\n",
+						__FUNCTION__));
+					goto exit;
+				}
+			}
+
+	}
+
+	INIT_LIST_HEAD(&(_params->params_hotlist.bssid_list));
+
+	err = _dhd_pno_add_bssid(dhd, p_pfn_bssid, hotlist_params->nbssid);
+	if (err < 0) {
+		DHD_ERROR(("%s : failed to call _dhd_pno_add_bssid(err :%d)\n",
+			__FUNCTION__, err));
+		goto exit;
+	}
+	if ((err = _dhd_pno_set(dhd, _params, DHD_PNO_HOTLIST_MODE)) < 0) {
+		DHD_ERROR(("%s : failed to set call pno_set (err %d) in firmware\n",
+			__FUNCTION__, err));
+		goto exit;
+	}
+	if (tot_nchan > 0) {
+		if ((err = _dhd_pno_cfg(dhd, _chan_list, tot_nchan)) < 0) {
+			DHD_ERROR(("%s : failed to set call pno_cfg (err %d) in firmware\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+	for (i = 0; i < hotlist_params->nbssid; i++) {
+		_pno_bssid = kzalloc(sizeof(struct dhd_pno_bssid), GFP_KERNEL);
+		NULL_CHECK(_pno_bssid, "_pfn_bssid is NULL", err);
+		memcpy(&_pno_bssid->macaddr, &p_pfn_bssid[i].macaddr, ETHER_ADDR_LEN);
+		_pno_bssid->flags = p_pfn_bssid[i].flags;
+		list_add_tail(&_pno_bssid->list, &_params->params_hotlist.bssid_list);
+	}
+	_params->params_hotlist.nbssid = hotlist_params->nbssid;
+	if (_pno_state->pno_status == DHD_PNO_DISABLED) {
+		if ((err = _dhd_pno_enable(dhd, PNO_ON)) < 0)
+			DHD_ERROR(("%s : failed to enable PNO\n", __FUNCTION__));
+	}
+exit:
+	/* clear mode in case of error */
+	if (err < 0)
+		_pno_state->pno_mode &= ~DHD_PNO_HOTLIST_MODE;
+	return err;
+}
+
+int
+dhd_pno_stop_for_hotlist(dhd_pub_t *dhd)
+{
+	int err = BCME_OK;
+	uint32 mode = 0;
+	dhd_pno_status_info_t *_pno_state;
+	dhd_pno_params_t *_params;
+	wlc_ssid_t *p_ssid_list;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n",
+			__FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+
+	if (!(_pno_state->pno_mode & DHD_PNO_HOTLIST_MODE)) {
+		DHD_ERROR(("%s : Hotlist MODE is not enabled\n",
+			__FUNCTION__));
+		goto exit;
+	}
+	_pno_state->pno_mode &= ~DHD_PNO_BATCH_MODE;
+
+	if (_pno_state->pno_mode & (DHD_PNO_LEGACY_MODE | DHD_PNO_BATCH_MODE)) {
+		/* retrieve the batching data from firmware into host */
+		dhd_pno_get_for_batch(dhd, NULL, 0, PNO_STATUS_DISABLE);
+		/* save current pno_mode before calling dhd_pno_clean */
+		mode = _pno_state->pno_mode;
+		err = _dhd_pno_clean(dhd);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_clean (err: %d)\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+		/* restore previos pno mode */
+		_pno_state->pno_mode = mode;
+		if (_pno_state->pno_mode & DHD_PNO_LEGACY_MODE) {
+			/* restart Legacy PNO Scan */
+			struct dhd_pno_legacy_params *_params_legacy;
+			struct dhd_pno_ssid *iter, *next;
+			_params_legacy =
+			&(_pno_state->pno_params_arr[INDEX_OF_LEGACY_PARAMS].params_legacy);
+			p_ssid_list =
+			kzalloc(sizeof(wlc_ssid_t) * _params_legacy->nssid, GFP_KERNEL);
+			if (p_ssid_list == NULL) {
+				DHD_ERROR(("%s : failed to allocate wlc_ssid_t array (count: %d)",
+					__FUNCTION__, _params_legacy->nssid));
+				err = BCME_ERROR;
+				_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+				goto exit;
+			}
+			/* convert dhd_pno_ssid to dhd_pno_ssid */
+			list_for_each_entry_safe(iter, next, &_params_legacy->ssid_list, list) {
+				p_ssid_list->SSID_len = iter->SSID_len;
+				memcpy(p_ssid_list->SSID, iter->SSID, p_ssid_list->SSID_len);
+				p_ssid_list++;
+			}
+			err = dhd_pno_set_for_ssid(dhd, p_ssid_list, _params_legacy->nssid,
+				_params_legacy->scan_fr, _params_legacy->pno_repeat,
+				_params_legacy->pno_freq_expo_max, _params_legacy->chan_list,
+				_params_legacy->nchan);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_LEGACY_MODE;
+				DHD_ERROR(("%s : failed to restart legacy PNO scan(err: %d)\n",
+					__FUNCTION__, err));
+				goto exit;
+			}
+		} else if (_pno_state->pno_mode & DHD_PNO_BATCH_MODE) {
+			/* restart Batching Scan */
+			_params = &(_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS]);
+			/* restart BATCH SCAN */
+			err = dhd_pno_set_for_batch(dhd, &_params->params_batch);
+			if (err < 0) {
+				_pno_state->pno_mode &= ~DHD_PNO_BATCH_MODE;
+				DHD_ERROR(("%s : failed to restart batch scan(err: %d)\n",
+					__FUNCTION__,  err));
+				goto exit;
+			}
+		}
+	} else {
+		err = _dhd_pno_clean(dhd);
+		if (err < 0) {
+			DHD_ERROR(("%s : failed to call _dhd_pno_clean (err: %d)\n",
+				__FUNCTION__, err));
+			goto exit;
+		}
+	}
+exit:
+	return err;
+}
+
+int
+dhd_pno_event_handler(dhd_pub_t *dhd, wl_event_msg_t *event, void *event_data)
+{
+	int err = BCME_OK;
+	uint status, event_type, flags, datalen;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	NULL_CHECK(dhd->pno_state, "pno_state is NULL", err);
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	if (!WLS_SUPPORTED(_pno_state)) {
+		DHD_ERROR(("%s : wifi location service is not supported\n", __FUNCTION__));
+		err = BCME_UNSUPPORTED;
+		goto exit;
+	}
+	event_type = ntoh32(event->event_type);
+	flags = ntoh16(event->flags);
+	status = ntoh32(event->status);
+	datalen = ntoh32(event->datalen);
+	DHD_PNO(("%s enter : event_type :%d\n", __FUNCTION__, event_type));
+	switch (event_type) {
+	case WLC_E_PFN_BSSID_NET_FOUND:
+	case WLC_E_PFN_BSSID_NET_LOST:
+		/* TODO : need to implement event logic using generic netlink */
+		break;
+	case WLC_E_PFN_BEST_BATCHING:
+	{
+		struct dhd_pno_batch_params *params_batch;
+		params_batch = &_pno_state->pno_params_arr[INDEX_OF_BATCH_PARAMS].params_batch;
+		DHD_PNO(("%s : WLC_E_PFN_BEST_BATCHING\n", __FUNCTION__));
+		params_batch->get_batch.buf = NULL;
+		params_batch->get_batch.bufsize = 0;
+		params_batch->get_batch.reason = PNO_STATUS_EVENT;
+		schedule_work(&_pno_state->work);
+		break;
+	}
+	default:
+		DHD_ERROR(("unknown event : %d\n", event_type));
+	}
+exit:
+	return err;
+}
+
+int dhd_pno_init(dhd_pub_t *dhd)
+{
+	int err = BCME_OK;
+	dhd_pno_status_info_t *_pno_state;
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	UNUSED_PARAMETER(_dhd_pno_suspend);
+	if (dhd->pno_state)
+		goto exit;
+	dhd->pno_state = MALLOC(dhd->osh, sizeof(dhd_pno_status_info_t));
+	memset(dhd->pno_state, 0, sizeof(dhd_pno_status_info_t));
+	NULL_CHECK(dhd, "failed to create dhd_pno_state", err);
+	/* need to check whether current firmware support batching and hotlist scan */
+	_pno_state = PNO_GET_PNOSTATE(dhd);
+	_pno_state->wls_supported = TRUE;
+	_pno_state->dhd = dhd;
+	mutex_init(&_pno_state->pno_mutex);
+	INIT_WORK(&_pno_state->work, _dhd_pno_get_batch_handler);
+	init_completion(&_pno_state->get_batch_done);
+	err = dhd_iovar(dhd, 0, "pfnlbest", NULL, 0, 0);
+	if (err == BCME_UNSUPPORTED) {
+		_pno_state->wls_supported = FALSE;
+		DHD_INFO(("Current firmware doesn't support"
+			" Android Location Service\n"));
+	}
+exit:
+	return err;
+}
+int dhd_pno_deinit(dhd_pub_t *dhd)
+{
+	int err = BCME_OK;
+	dhd_pno_status_info_t *_pno_state = PNO_GET_PNOSTATE(dhd);
+	NULL_CHECK(dhd, "dhd is NULL", err);
+	DHD_PNO(("%s enter\n", __FUNCTION__));
+	cancel_work_sync(&_pno_state->work);
+	if (dhd->pno_state)
+		MFREE(dhd->osh, dhd->pno_state, sizeof(dhd_pno_status_info_t));
+	dhd->pno_state = NULL;
+	return err;
+}