diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/scan.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/scan.c | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/drivers/net/wireless/wl12xx/scan.c b/drivers/net/wireless/wl12xx/scan.c deleted file mode 100644 index 6f897b9d90c..00000000000 --- a/drivers/net/wireless/wl12xx/scan.c +++ /dev/null @@ -1,311 +0,0 @@ -/* - * 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 "wl12xx.h" -#include "cmd.h" -#include "scan.h" -#include "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); - - /* restore hardware connection monitoring template */ - if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) - wl1271_cmd_build_ap_probe_req(wl, wl->probereq); - - 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; -} |