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/*
* This file is part of wl18xx
*
* Copyright (C) 2012 Texas Instruments. All rights reserved.
*
* 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 "scan.h"
#include "../wlcore/debug.h"
static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *cmd,
struct wlcore_scan_channels *cmd_channels)
{
memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
cmd->dfs = cmd_channels->dfs;
cmd->passive_active = cmd_channels->passive_active;
memcpy(cmd->channels_2, cmd_channels->channels_2,
sizeof(cmd->channels_2));
memcpy(cmd->channels_5, cmd_channels->channels_5,
sizeof(cmd->channels_5));
/* channels_4 are not supported, so no need to copy them */
}
static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
struct cfg80211_scan_request *req)
{
struct wl18xx_cmd_scan_params *cmd;
struct wlcore_scan_channels *cmd_channels = NULL;
int ret;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
ret = -ENOMEM;
goto out;
}
cmd->role_id = wlvif->role_id;
if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
ret = -EINVAL;
goto out;
}
cmd->scan_type = SCAN_TYPE_SEARCH;
cmd->rssi_threshold = -127;
cmd->snr_threshold = 0;
cmd->bss_type = SCAN_BSS_TYPE_ANY;
cmd->ssid_from_list = 0;
cmd->filter = 0;
cmd->add_broadcast = 0;
cmd->urgency = 0;
cmd->protect = 0;
cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
cmd->terminate_after = 0;
/* configure channels */
WARN_ON(req->n_ssids > 1);
cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
if (!cmd_channels) {
ret = -ENOMEM;
goto out;
}
wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
req->n_channels, req->n_ssids,
SCAN_TYPE_SEARCH);
wl18xx_adjust_channels(cmd, cmd_channels);
/*
* all the cycles params (except total cycles) should
* remain 0 for normal scan
*/
cmd->total_cycles = 1;
if (req->no_cck)
cmd->rate = WL18XX_SCAN_RATE_6;
cmd->tag = WL1271_SCAN_DEFAULT_TAG;
if (req->n_ssids) {
cmd->ssid_len = req->ssids[0].ssid_len;
memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
}
/* TODO: per-band ies? */
if (cmd->active[0]) {
u8 band = IEEE80211_BAND_2GHZ;
ret = wl12xx_cmd_build_probe_req(wl, wlvif,
cmd->role_id, band,
req->ssids ? req->ssids[0].ssid : NULL,
req->ssids ? req->ssids[0].ssid_len : 0,
req->ie,
req->ie_len,
NULL,
0,
false);
if (ret < 0) {
wl1271_error("2.4GHz PROBE request template failed");
goto out;
}
}
if (cmd->active[1] || cmd->dfs) {
u8 band = IEEE80211_BAND_5GHZ;
ret = wl12xx_cmd_build_probe_req(wl, wlvif,
cmd->role_id, band,
req->ssids ? req->ssids[0].ssid : NULL,
req->ssids ? req->ssids[0].ssid_len : 0,
req->ie,
req->ie_len,
NULL,
0,
false);
if (ret < 0) {
wl1271_error("5GHz PROBE request template failed");
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_channels);
kfree(cmd);
return ret;
}
void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
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));
}
static
int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
struct wl12xx_vif *wlvif,
struct cfg80211_sched_scan_request *req,
struct ieee80211_scan_ies *ies)
{
struct wl18xx_cmd_scan_params *cmd;
struct wlcore_scan_channels *cmd_channels = NULL;
struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
int ret;
int filter_type;
wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
if (filter_type < 0)
return filter_type;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
ret = -ENOMEM;
goto out;
}
cmd->role_id = wlvif->role_id;
if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
ret = -EINVAL;
goto out;
}
cmd->scan_type = SCAN_TYPE_PERIODIC;
cmd->rssi_threshold = c->rssi_threshold;
cmd->snr_threshold = c->snr_threshold;
/* don't filter on BSS type */
cmd->bss_type = SCAN_BSS_TYPE_ANY;
cmd->ssid_from_list = 1;
if (filter_type == SCAN_SSID_FILTER_LIST)
cmd->filter = 1;
cmd->add_broadcast = 0;
cmd->urgency = 0;
cmd->protect = 0;
cmd->n_probe_reqs = c->num_probe_reqs;
/* don't stop scanning automatically when something is found */
cmd->terminate_after = 0;
cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
if (!cmd_channels) {
ret = -ENOMEM;
goto out;
}
/* configure channels */
wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
req->n_channels, req->n_ssids,
SCAN_TYPE_PERIODIC);
wl18xx_adjust_channels(cmd, cmd_channels);
cmd->short_cycles_sec = 0;
cmd->long_cycles_sec = cpu_to_le16(req->interval);
cmd->short_cycles_count = 0;
cmd->total_cycles = 0;
cmd->tag = WL1271_SCAN_DEFAULT_TAG;
/* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
cmd->report_threshold = 1;
cmd->terminate_on_report = 0;
if (cmd->active[0]) {
u8 band = IEEE80211_BAND_2GHZ;
ret = wl12xx_cmd_build_probe_req(wl, wlvif,
cmd->role_id, band,
req->ssids ? req->ssids[0].ssid : NULL,
req->ssids ? req->ssids[0].ssid_len : 0,
ies->ies[band],
ies->len[band],
ies->common_ies,
ies->common_ie_len,
true);
if (ret < 0) {
wl1271_error("2.4GHz PROBE request template failed");
goto out;
}
}
if (cmd->active[1] || cmd->dfs) {
u8 band = IEEE80211_BAND_5GHZ;
ret = wl12xx_cmd_build_probe_req(wl, wlvif,
cmd->role_id, band,
req->ssids ? req->ssids[0].ssid : NULL,
req->ssids ? req->ssids[0].ssid_len : 0,
ies->ies[band],
ies->len[band],
ies->common_ies,
ies->common_ie_len,
true);
if (ret < 0) {
wl1271_error("5GHz PROBE request template failed");
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_channels);
kfree(cmd);
return ret;
}
int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
struct cfg80211_sched_scan_request *req,
struct ieee80211_scan_ies *ies)
{
return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
}
static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
u8 scan_type)
{
struct wl18xx_cmd_scan_stop *stop;
int ret;
wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
stop = kzalloc(sizeof(*stop), GFP_KERNEL);
if (!stop) {
wl1271_error("failed to alloc memory to send sched scan stop");
return -ENOMEM;
}
stop->role_id = wlvif->role_id;
stop->scan_type = scan_type;
ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
if (ret < 0) {
wl1271_error("failed to send sched scan stop command");
goto out_free;
}
out_free:
kfree(stop);
return ret;
}
void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
__wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
}
int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
struct cfg80211_scan_request *req)
{
return wl18xx_scan_send(wl, wlvif, req);
}
int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
{
return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
}
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