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/*
* 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"
int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
struct cfg80211_scan_request *req, u8 active_scan,
u8 high_prio, u8 band, u8 probe_requests)
{
struct wl1271_cmd_trigger_scan_to *trigger = NULL;
struct wl1271_cmd_scan *params = NULL;
struct ieee80211_channel *channels;
u32 rate;
int i, j, n_ch, ret;
u16 scan_options = 0;
u8 ieee_band;
if (band == WL1271_SCAN_BAND_2_4_GHZ) {
ieee_band = IEEE80211_BAND_2GHZ;
rate = wl->conf.tx.basic_rate;
} else if (band == WL1271_SCAN_BAND_DUAL && wl1271_11a_enabled()) {
ieee_band = IEEE80211_BAND_2GHZ;
rate = wl->conf.tx.basic_rate;
} else if (band == WL1271_SCAN_BAND_5_GHZ && wl1271_11a_enabled()) {
ieee_band = IEEE80211_BAND_5GHZ;
rate = wl->conf.tx.basic_rate_5;
} else
return -EINVAL;
if (wl->hw->wiphy->bands[ieee_band]->channels == NULL)
return -EINVAL;
channels = wl->hw->wiphy->bands[ieee_band]->channels;
n_ch = wl->hw->wiphy->bands[ieee_band]->n_channels;
if (test_bit(WL1271_FLAG_SCANNING, &wl->flags))
return -EINVAL;
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params)
return -ENOMEM;
params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
params->params.rx_filter_options =
cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
if (!active_scan)
scan_options |= WL1271_SCAN_OPT_PASSIVE;
if (high_prio)
scan_options |= WL1271_SCAN_OPT_PRIORITY_HIGH;
params->params.scan_options = cpu_to_le16(scan_options);
params->params.num_probe_requests = probe_requests;
params->params.tx_rate = cpu_to_le32(rate);
params->params.tid_trigger = 0;
params->params.scan_tag = WL1271_SCAN_DEFAULT_TAG;
if (band == WL1271_SCAN_BAND_DUAL)
params->params.band = WL1271_SCAN_BAND_2_4_GHZ;
else
params->params.band = band;
for (i = 0, j = 0; i < n_ch && i < WL1271_SCAN_MAX_CHANNELS; i++) {
if (!(channels[i].flags & IEEE80211_CHAN_DISABLED)) {
params->channels[j].min_duration =
cpu_to_le32(WL1271_SCAN_CHAN_MIN_DURATION);
params->channels[j].max_duration =
cpu_to_le32(WL1271_SCAN_CHAN_MAX_DURATION);
memset(¶ms->channels[j].bssid_lsb, 0xff, 4);
memset(¶ms->channels[j].bssid_msb, 0xff, 2);
params->channels[j].early_termination = 0;
params->channels[j].tx_power_att =
WL1271_SCAN_CURRENT_TX_PWR;
params->channels[j].channel = channels[i].hw_value;
j++;
}
}
params->params.num_channels = j;
if (ssid_len && ssid) {
params->params.ssid_len = ssid_len;
memcpy(params->params.ssid, ssid, ssid_len);
}
ret = wl1271_cmd_build_probe_req(wl, ssid, ssid_len,
req->ie, req->ie_len, ieee_band);
if (ret < 0) {
wl1271_error("PROBE request template failed");
goto out;
}
trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
if (!trigger) {
ret = -ENOMEM;
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: ", params, sizeof(*params));
set_bit(WL1271_FLAG_SCANNING, &wl->flags);
if (wl1271_11a_enabled()) {
wl->scan.state = band;
if (band == WL1271_SCAN_BAND_DUAL) {
wl->scan.active = active_scan;
wl->scan.high_prio = high_prio;
wl->scan.probe_requests = probe_requests;
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;
} else
wl->scan.req = NULL;
}
ret = wl1271_cmd_send(wl, CMD_SCAN, params, sizeof(*params), 0);
if (ret < 0) {
wl1271_error("SCAN failed");
clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
goto out;
}
out:
kfree(params);
kfree(trigger);
return ret;
}
int wl1271_scan_complete(struct wl1271 *wl)
{
if (test_bit(WL1271_FLAG_SCANNING, &wl->flags)) {
if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
/* 2.4 GHz band scanned, scan 5 GHz band, pretend to
* the wl1271_scan function that we are not scanning
* as it checks that.
*/
clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
/* FIXME: ie missing! */
wl1271_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
wl->scan.req,
wl->scan.active,
wl->scan.high_prio,
WL1271_SCAN_BAND_5_GHZ,
wl->scan.probe_requests);
} else {
mutex_unlock(&wl->mutex);
ieee80211_scan_completed(wl->hw, false);
mutex_lock(&wl->mutex);
clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
}
}
return 0;
}
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