1 files changed, 326 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wl18xx/scan.c b/drivers/net/wireless/ti/wl18xx/scan.c
new file mode 100644
index 000000000000..09d944505ac0
--- /dev/null
+++ b/drivers/net/wireless/ti/wl18xx/scan.c
@@ -0,0 +1,326 @@
+/*
+ * 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_2));
+        /* 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,
+                                 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,
+                                 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_sched_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->ie[band],
+                                 ies->len[band],
+                                 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->ie[band],
+                                 ies->len[band],
+                                 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_sched_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);
+}