wl1271: moved scan operations to a separate file
The scanning code is going to get a bit more complex, with proper support for
active/passive scans together with 2.4GHz and 5GHz. In the future, also a
new type of scan (periodic scan) will be added. When all this is
implemented, the code is going to be much more complex, so we'd better
separate it into a separate file.
This patch doesn't have any impact on functionality.
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Saravanan Dhanabal <ext-saravanan.dhanabal@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl1271_scan.c b/drivers/net/wireless/wl12xx/wl1271_scan.c
new file mode 100644
index 0000000..eb9b4ec
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/wl1271_scan.c
@@ -0,0 +1,191 @@
+/*
+ * 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;
+}