[net-next-2.6.git] / drivers / net / wireless / wl12xx / wl1271_scan.c

/*
 * This file is part of wl1271
 *
 * Copyright (C) 2009-2010 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/ieee80211.h>

#include "wl1271.h"
#include "wl1271_cmd.h"
#include "wl1271_scan.h"
#include "wl1271_acx.h"

void wl1271_scan_complete_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, scan_complete_work);

	wl1271_debug(DEBUG_SCAN, "Scanning complete");

	mutex_lock(&wl->mutex);

	if (wl->scan.state == WL1271_SCAN_STATE_IDLE) {
		mutex_unlock(&wl->mutex);
		return;
	}

	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	kfree(wl->scan.scanned_ch);
	wl->scan.scanned_ch = NULL;
	wl->scan.req = NULL;
	ieee80211_scan_completed(wl->hw, false);

	if (wl->scan.failed) {
		wl1271_info("Scan completed due to error.");
		ieee80211_queue_work(wl->hw, &wl->recovery_work);
	}
	mutex_unlock(&wl->mutex);

}


static int wl1271_get_scan_channels(struct wl1271 *wl,
				    struct cfg80211_scan_request *req,
				    struct basic_scan_channel_params *channels,
				    enum ieee80211_band band, bool passive)
{
	struct conf_scan_settings *c = &wl->conf.scan;
	int i, j;
	u32 flags;

	for (i = 0, j = 0;
	     i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
	     i++) {

		flags = req->channels[i]->flags;

		if (!wl->scan.scanned_ch[i] &&
		    !(flags & IEEE80211_CHAN_DISABLED) &&
		    ((!!(flags & IEEE80211_CHAN_PASSIVE_SCAN)) == passive) &&
		    (req->channels[i]->band == band)) {

			wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
				     req->channels[i]->band,
				     req->channels[i]->center_freq);
			wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
				     req->channels[i]->hw_value,
				     req->channels[i]->flags);
			wl1271_debug(DEBUG_SCAN,
				     "max_antenna_gain %d, max_power %d",
				     req->channels[i]->max_antenna_gain,
				     req->channels[i]->max_power);
			wl1271_debug(DEBUG_SCAN, "beacon_found %d",
				     req->channels[i]->beacon_found);

			if (!passive) {
				channels[j].min_duration =
					cpu_to_le32(c->min_dwell_time_active);
				channels[j].max_duration =
					cpu_to_le32(c->max_dwell_time_active);
			} else {
				channels[j].min_duration =
					cpu_to_le32(c->min_dwell_time_passive);
				channels[j].max_duration =
					cpu_to_le32(c->max_dwell_time_passive);
			}
			channels[j].early_termination = 0;
			channels[j].tx_power_att = req->channels[i]->max_power;
			channels[j].channel = req->channels[i]->hw_value;

			memset(&channels[j].bssid_lsb, 0xff, 4);
			memset(&channels[j].bssid_msb, 0xff, 2);

			/* Mark the channels we already used */
			wl->scan.scanned_ch[i] = true;

			j++;
		}
	}

	return j;
}

#define WL1271_NOTHING_TO_SCAN 1

static int wl1271_scan_send(struct wl1271 *wl, enum ieee80211_band band,
			     bool passive, u32 basic_rate)
{
	struct wl1271_cmd_scan *cmd;
	struct wl1271_cmd_trigger_scan_to *trigger;
	int ret;
	u16 scan_options = 0;

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
	if (!cmd || !trigger) {
		ret = -ENOMEM;
		goto out;
	}

	/* We always use high priority scans */
	scan_options = WL1271_SCAN_OPT_PRIORITY_HIGH;

	/* No SSIDs means that we have a forced passive scan */
	if (passive || wl->scan.req->n_ssids == 0)
		scan_options |= WL1271_SCAN_OPT_PASSIVE;

	cmd->params.scan_options = cpu_to_le16(scan_options);

	cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
						    cmd->channels,
						    band, passive);
	if (cmd->params.n_ch == 0) {
		ret = WL1271_NOTHING_TO_SCAN;
		goto out;
	}

	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
	cmd->params.rx_filter_options =
		cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);

	cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	cmd->params.tid_trigger = 0;
	cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;

	if (band == IEEE80211_BAND_2GHZ)
		cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
	else
		cmd->params.band = WL1271_SCAN_BAND_5_GHZ;

	if (wl->scan.ssid_len && wl->scan.ssid) {
		cmd->params.ssid_len = wl->scan.ssid_len;
		memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
	}

	ret = wl1271_cmd_build_probe_req(wl, wl->scan.ssid, wl->scan.ssid_len,
					 wl->scan.req->ie, wl->scan.req->ie_len,
					 band);
	if (ret < 0) {
		wl1271_error("PROBE request template failed");
		goto out;
	}

	/* disable the timeout */
	trigger->timeout = 0;
	ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
			      sizeof(*trigger), 0);
	if (ret < 0) {
		wl1271_error("trigger scan to failed for hw scan");
		goto out;
	}

	wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));

	ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
	if (ret < 0) {
		wl1271_error("SCAN failed");
		goto out;
	}

out:
	kfree(cmd);
	kfree(trigger);
	return ret;
}

void wl1271_scan_stm(struct wl1271 *wl)
{
	int ret = 0;

	switch (wl->scan.state) {
	case WL1271_SCAN_STATE_IDLE:
		break;

	case WL1271_SCAN_STATE_2GHZ_ACTIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, false,
				       wl->conf.tx.basic_rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_2GHZ_PASSIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, true,
				       wl->conf.tx.basic_rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			if (wl->enable_11a)
				wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
			else
				wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_ACTIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, false,
				       wl->conf.tx.basic_rate_5);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_PASSIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, true,
				       wl->conf.tx.basic_rate_5);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_DONE:
		wl->scan.failed = false;
		cancel_delayed_work(&wl->scan_complete_work);
		ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
					     msecs_to_jiffies(0));
		break;

	default:
		wl1271_error("invalid scan state");
		break;
	}

	if (ret < 0) {
		cancel_delayed_work(&wl->scan_complete_work);
		ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
					     msecs_to_jiffies(0));
	}
}

int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
		struct cfg80211_scan_request *req)
{
	if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
		return -EBUSY;

	wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;

	if (ssid_len && ssid) {
		wl->scan.ssid_len = ssid_len;
		memcpy(wl->scan.ssid, ssid, ssid_len);
	} else {
		wl->scan.ssid_len = 0;
	}

	wl->scan.req = req;

	wl->scan.scanned_ch = kcalloc(req->n_channels,
				      sizeof(*wl->scan.scanned_ch),
				      GFP_KERNEL);
	/* we assume failure so that timeout scenarios are handled correctly */
	wl->scan.failed = true;
	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
				     msecs_to_jiffies(WL1271_SCAN_TIMEOUT));

	wl1271_scan_stm(wl);

	return 0;
}
Commit	Line	Data
34dd2aaa LC	1	/*
	2	* This file is part of wl1271
	3	*
	4	* Copyright (C) 2009-2010 Nokia Corporation
	5	*
	6	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*
	22	*/
	23
	24	#include <linux/ieee80211.h>
	25
	26	#include "wl1271.h"
	27	#include "wl1271_cmd.h"
	28	#include "wl1271_scan.h"
	29	#include "wl1271_acx.h"
	30
c454f1d9 JO	31	void wl1271_scan_complete_work(struct work_struct *work)
c454f1d9 JO	32	{
78abd320 JO	33	struct delayed_work *dwork;
	34	struct wl1271 *wl;
	35
	36	dwork = container_of(work, struct delayed_work, work);
	37	wl = container_of(dwork, struct wl1271, scan_complete_work);
c454f1d9 JO	38
	39	wl1271_debug(DEBUG_SCAN, "Scanning complete");
	40
	41	mutex_lock(&wl->mutex);
52a2a375 JO	42
	43	if (wl->scan.state == WL1271_SCAN_STATE_IDLE) {
	44	mutex_unlock(&wl->mutex);
	45	return;
	46	}
	47
c454f1d9 JO	48	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	49	kfree(wl->scan.scanned_ch);
	50	wl->scan.scanned_ch = NULL;
b739a42c	51	wl->scan.req = NULL;
c454f1d9	52	ieee80211_scan_completed(wl->hw, false);
78abd320 JO	53
	54	if (wl->scan.failed) {
	55	wl1271_info("Scan completed due to error.");
	56	ieee80211_queue_work(wl->hw, &wl->recovery_work);
	57	}
b739a42c JO	58	mutex_unlock(&wl->mutex);
b739a42c JO	59
c454f1d9 JO	60	}
	61
	62
08688d6b LC	63	static int wl1271_get_scan_channels(struct wl1271 *wl,
	64	struct cfg80211_scan_request *req,
	65	struct basic_scan_channel_params *channels,
	66	enum ieee80211_band band, bool passive)
34dd2aaa	67	{
bea39d6a	68	struct conf_scan_settings *c = &wl->conf.scan;
08688d6b LC	69	int i, j;
08688d6b LC	70	u32 flags;
34dd2aaa	71
08688d6b LC	72	for (i = 0, j = 0;
	73	i < req->n_channels && j < WL1271_SCAN_MAX_CHANNELS;
	74	i++) {
34dd2aaa	75
08688d6b	76	flags = req->channels[i]->flags;
34dd2aaa	77
08688d6b LC	78	if (!wl->scan.scanned_ch[i] &&
	79	!(flags & IEEE80211_CHAN_DISABLED) &&
	80	((!!(flags & IEEE80211_CHAN_PASSIVE_SCAN)) == passive) &&
	81	(req->channels[i]->band == band)) {
34dd2aaa	82
08688d6b LC	83	wl1271_debug(DEBUG_SCAN, "band %d, center_freq %d ",
	84	req->channels[i]->band,
	85	req->channels[i]->center_freq);
	86	wl1271_debug(DEBUG_SCAN, "hw_value %d, flags %X",
	87	req->channels[i]->hw_value,
	88	req->channels[i]->flags);
	89	wl1271_debug(DEBUG_SCAN,
	90	"max_antenna_gain %d, max_power %d",
	91	req->channels[i]->max_antenna_gain,
	92	req->channels[i]->max_power);
	93	wl1271_debug(DEBUG_SCAN, "beacon_found %d",
	94	req->channels[i]->beacon_found);
34dd2aaa	95
bea39d6a JO	96	if (!passive) {
	97	channels[j].min_duration =
	98	cpu_to_le32(c->min_dwell_time_active);
	99	channels[j].max_duration =
	100	cpu_to_le32(c->max_dwell_time_active);
	101	} else {
	102	channels[j].min_duration =
	103	cpu_to_le32(c->min_dwell_time_passive);
	104	channels[j].max_duration =
	105	cpu_to_le32(c->max_dwell_time_passive);
	106	}
08688d6b	107	channels[j].early_termination = 0;
3cc7b544	108	channels[j].tx_power_att = req->channels[i]->max_power;
08688d6b LC	109	channels[j].channel = req->channels[i]->hw_value;
	110
	111	memset(&channels[j].bssid_lsb, 0xff, 4);
	112	memset(&channels[j].bssid_msb, 0xff, 2);
	113
	114	/* Mark the channels we already used */
	115	wl->scan.scanned_ch[i] = true;
	116
34dd2aaa LC	117	j++;
	118	}
	119	}
	120
08688d6b LC	121	return j;
08688d6b LC	122	}
34dd2aaa	123
08688d6b LC	124	#define WL1271_NOTHING_TO_SCAN 1
	125
	126	static int wl1271_scan_send(struct wl1271 *wl, enum ieee80211_band band,
	127	bool passive, u32 basic_rate)
	128	{
	129	struct wl1271_cmd_scan *cmd;
	130	struct wl1271_cmd_trigger_scan_to *trigger;
	131	int ret;
	132	u16 scan_options = 0;
	133
	134	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	135	trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
	136	if (!cmd \|\| !trigger) {
	137	ret = -ENOMEM;
	138	goto out;
34dd2aaa LC	139	}
34dd2aaa LC	140
08688d6b LC	141	/* We always use high priority scans */
08688d6b LC	142	scan_options = WL1271_SCAN_OPT_PRIORITY_HIGH;
4f35c025 LC	143
	144	/* No SSIDs means that we have a forced passive scan */
	145	if (passive \|\| wl->scan.req->n_ssids == 0)
08688d6b	146	scan_options \|= WL1271_SCAN_OPT_PASSIVE;
4f35c025	147
08688d6b LC	148	cmd->params.scan_options = cpu_to_le16(scan_options);
	149
	150	cmd->params.n_ch = wl1271_get_scan_channels(wl, wl->scan.req,
	151	cmd->channels,
	152	band, passive);
	153	if (cmd->params.n_ch == 0) {
	154	ret = WL1271_NOTHING_TO_SCAN;
34dd2aaa LC	155	goto out;
	156	}
	157
08688d6b LC	158	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	159	cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
	160	cmd->params.rx_filter_options =
	161	cpu_to_le32(CFG_RX_PRSP_EN \| CFG_RX_MGMT_EN \| CFG_RX_BCN_EN);
	162
bea39d6a	163	cmd->params.n_probe_reqs = wl->conf.scan.num_probe_reqs;
08688d6b LC	164	cmd->params.tx_rate = cpu_to_le32(basic_rate);
	165	cmd->params.tid_trigger = 0;
	166	cmd->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
	167
	168	if (band == IEEE80211_BAND_2GHZ)
	169	cmd->params.band = WL1271_SCAN_BAND_2_4_GHZ;
	170	else
	171	cmd->params.band = WL1271_SCAN_BAND_5_GHZ;
	172
	173	if (wl->scan.ssid_len && wl->scan.ssid) {
	174	cmd->params.ssid_len = wl->scan.ssid_len;
	175	memcpy(cmd->params.ssid, wl->scan.ssid, wl->scan.ssid_len);
	176	}
	177
	178	ret = wl1271_cmd_build_probe_req(wl, wl->scan.ssid, wl->scan.ssid_len,
	179	wl->scan.req->ie, wl->scan.req->ie_len,
	180	band);
	181	if (ret < 0) {
	182	wl1271_error("PROBE request template failed");
34dd2aaa LC	183	goto out;
	184	}
	185
	186	/* disable the timeout */
	187	trigger->timeout = 0;
34dd2aaa LC	188	ret = wl1271_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
	189	sizeof(*trigger), 0);
	190	if (ret < 0) {
	191	wl1271_error("trigger scan to failed for hw scan");
	192	goto out;
	193	}
	194
08688d6b	195	wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
34dd2aaa	196
08688d6b	197	ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
34dd2aaa LC	198	if (ret < 0) {
34dd2aaa LC	199	wl1271_error("SCAN failed");
34dd2aaa LC	200	goto out;
	201	}
	202
	203	out:
08688d6b	204	kfree(cmd);
34dd2aaa LC	205	kfree(trigger);
	206	return ret;
	207	}
	208
08688d6b	209	void wl1271_scan_stm(struct wl1271 *wl)
34dd2aaa	210	{
78abd320	211	int ret = 0;
08688d6b LC	212
	213	switch (wl->scan.state) {
	214	case WL1271_SCAN_STATE_IDLE:
	215	break;
	216
	217	case WL1271_SCAN_STATE_2GHZ_ACTIVE:
	218	ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, false,
	219	wl->conf.tx.basic_rate);
	220	if (ret == WL1271_NOTHING_TO_SCAN) {
	221	wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
	222	wl1271_scan_stm(wl);
	223	}
	224
	225	break;
	226
	227	case WL1271_SCAN_STATE_2GHZ_PASSIVE:
	228	ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, true,
	229	wl->conf.tx.basic_rate);
	230	if (ret == WL1271_NOTHING_TO_SCAN) {
02fabb0e	231	if (wl->enable_11a)
08688d6b LC	232	wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
	233	else
	234	wl->scan.state = WL1271_SCAN_STATE_DONE;
	235	wl1271_scan_stm(wl);
34dd2aaa	236	}
08688d6b LC	237
	238	break;
	239
	240	case WL1271_SCAN_STATE_5GHZ_ACTIVE:
	241	ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, false,
	242	wl->conf.tx.basic_rate_5);
	243	if (ret == WL1271_NOTHING_TO_SCAN) {
	244	wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
	245	wl1271_scan_stm(wl);
	246	}
	247
	248	break;
	249
	250	case WL1271_SCAN_STATE_5GHZ_PASSIVE:
	251	ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, true,
	252	wl->conf.tx.basic_rate_5);
	253	if (ret == WL1271_NOTHING_TO_SCAN) {
	254	wl->scan.state = WL1271_SCAN_STATE_DONE;
	255	wl1271_scan_stm(wl);
	256	}
	257
	258	break;
	259
	260	case WL1271_SCAN_STATE_DONE:
78abd320 JO	261	wl->scan.failed = false;
	262	cancel_delayed_work(&wl->scan_complete_work);
	263	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
	264	msecs_to_jiffies(0));
08688d6b LC	265	break;
	266
	267	default:
	268	wl1271_error("invalid scan state");
	269	break;
34dd2aaa	270	}
78abd320 JO	271
	272	if (ret < 0) {
	273	cancel_delayed_work(&wl->scan_complete_work);
	274	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
	275	msecs_to_jiffies(0));
	276	}
08688d6b LC	277	}
	278
	279	int wl1271_scan(struct wl1271 wl, const u8 ssid, size_t ssid_len,
	280	struct cfg80211_scan_request *req)
	281	{
	282	if (wl->scan.state != WL1271_SCAN_STATE_IDLE)
	283	return -EBUSY;
	284
	285	wl->scan.state = WL1271_SCAN_STATE_2GHZ_ACTIVE;
	286
	287	if (ssid_len && ssid) {
	288	wl->scan.ssid_len = ssid_len;
	289	memcpy(wl->scan.ssid, ssid, ssid_len);
	290	} else {
	291	wl->scan.ssid_len = 0;
	292	}
	293
	294	wl->scan.req = req;
	295
baeb2ffa	296	wl->scan.scanned_ch = kcalloc(req->n_channels,
08688d6b LC	297	sizeof(*wl->scan.scanned_ch),
08688d6b LC	298	GFP_KERNEL);
78abd320 JO	299	/* we assume failure so that timeout scenarios are handled correctly */
	300	wl->scan.failed = true;
	301	ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
	302	msecs_to_jiffies(WL1271_SCAN_TIMEOUT));
	303
08688d6b LC	304	wl1271_scan_stm(wl);
08688d6b LC	305
34dd2aaa LC	306	return 0;
34dd2aaa LC	307	}