+++ /dev/null
-/*
- * 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"
-
-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)
-{
- 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);
-
- channels[j].min_duration =
- cpu_to_le32(WL1271_SCAN_CHAN_MIN_DURATION);
- channels[j].max_duration =
- cpu_to_le32(WL1271_SCAN_CHAN_MAX_DURATION);
- 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;
- if(passive)
- 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 = WL1271_SCAN_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;
-
- 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 (wl1271_11a_enabled())
- 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:
- mutex_unlock(&wl->mutex);
- ieee80211_scan_completed(wl->hw, false);
- mutex_lock(&wl->mutex);
-
- kfree(wl->scan.scanned_ch);
- wl->scan.scanned_ch = NULL;
-
- wl->scan.state = WL1271_SCAN_STATE_IDLE;
- break;
-
- default:
- wl1271_error("invalid scan state");
- break;
- }
-}
-
-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 = kzalloc(req->n_channels *
- sizeof(*wl->scan.scanned_ch),
- GFP_KERNEL);
- wl1271_scan_stm(wl);
-
- return 0;
-}
projects / mv-sheeva.git / blobdiff