drivers/net/wireless/wl12xx/scan.h

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2009-2010 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #ifndef __SCAN_H__
  25 #define __SCAN_H__
  26
  27 #include "wl12xx.h"
  28
  29 int wl1271_scan(struct wl1271 *wl, struct ieee80211_vif *vif,
  30                 const u8 *ssid, size_t ssid_len,
  31                 struct cfg80211_scan_request *req);
  32 int wl1271_scan_stop(struct wl1271 *wl);
  33 int wl1271_scan_build_probe_req(struct wl1271 *wl,
  34                                 const u8 *ssid, size_t ssid_len,
  35                                 const u8 *ie, size_t ie_len, u8 band);
  36 void wl1271_scan_stm(struct wl1271 *wl, struct ieee80211_vif *vif);
  37 void wl1271_scan_complete_work(struct work_struct *work);
  38 int wl1271_scan_sched_scan_config(struct wl1271 *wl,
  39                                      struct wl12xx_vif *wlvif,
  40                                      struct cfg80211_sched_scan_request *req,
  41                                      struct ieee80211_sched_scan_ies *ies);
  42 int wl1271_scan_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif);
  43 void wl1271_scan_sched_scan_stop(struct wl1271 *wl);
  44 void wl1271_scan_sched_scan_results(struct wl1271 *wl);
  45
  46 #define WL1271_SCAN_MAX_CHANNELS       24
  47 #define WL1271_SCAN_DEFAULT_TAG        1
  48 #define WL1271_SCAN_CURRENT_TX_PWR     0
  49 #define WL1271_SCAN_OPT_ACTIVE         0
  50 #define WL1271_SCAN_OPT_PASSIVE        1
  51 #define WL1271_SCAN_OPT_SPLIT_SCAN     2
  52 #define WL1271_SCAN_OPT_PRIORITY_HIGH  4
  53 /* scan even if we fail to enter psm */
  54 #define WL1271_SCAN_OPT_FORCE          8
  55 #define WL1271_SCAN_BAND_2_4_GHZ 0
  56 #define WL1271_SCAN_BAND_5_GHZ 1
  57
  58 #define WL1271_SCAN_TIMEOUT    30000 /* msec */
  59
  60 enum {
  61         WL1271_SCAN_STATE_IDLE,
  62         WL1271_SCAN_STATE_2GHZ_ACTIVE,
  63         WL1271_SCAN_STATE_2GHZ_PASSIVE,
  64         WL1271_SCAN_STATE_5GHZ_ACTIVE,
  65         WL1271_SCAN_STATE_5GHZ_PASSIVE,
  66         WL1271_SCAN_STATE_DONE
  67 };
  68
  69 struct basic_scan_params {
  70         /* Scan option flags (WL1271_SCAN_OPT_*) */
  71         __le16 scan_options;
  72         u8 role_id;
  73         /* Number of scan channels in the list (maximum 30) */
  74         u8 n_ch;
  75         /* This field indicates the number of probe requests to send
  76            per channel for an active scan */
  77         u8 n_probe_reqs;
  78         u8 tid_trigger;
  79         u8 ssid_len;
  80         u8 use_ssid_list;
  81
  82         /* Rate bit field for sending the probes */
  83         __le32 tx_rate;
  84
  85         u8 ssid[IEEE80211_MAX_SSID_LEN];
  86         /* Band to scan */
  87         u8 band;
  88
  89         u8 scan_tag;
  90         u8 padding2[2];
  91 } __packed;
  92
  93 struct basic_scan_channel_params {
  94         /* Duration in TU to wait for frames on a channel for active scan */
  95         __le32 min_duration;
  96         __le32 max_duration;
  97         __le32 bssid_lsb;
  98         __le16 bssid_msb;
  99         u8 early_termination;
 100         u8 tx_power_att;
 101         u8 channel;
 102         /* FW internal use only! */
 103         u8 dfs_candidate;
 104         u8 activity_detected;
 105         u8 pad;
 106 } __packed;
 107
 108 struct wl1271_cmd_scan {
 109         struct wl1271_cmd_header header;
 110
 111         struct basic_scan_params params;
 112         struct basic_scan_channel_params channels[WL1271_SCAN_MAX_CHANNELS];
 113
 114         /* src mac address */
 115         u8 addr[ETH_ALEN];
 116         u8 padding[2];
 117 } __packed;
 118
 119 struct wl1271_cmd_trigger_scan_to {
 120         struct wl1271_cmd_header header;
 121
 122         __le32 timeout;
 123 } __packed;
 124
 125 #define MAX_CHANNELS_2GHZ       14
 126 #define MAX_CHANNELS_5GHZ       23
 127 #define MAX_CHANNELS_4GHZ       4
 128
 129 #define SCAN_MAX_CYCLE_INTERVALS 16
 130 #define SCAN_MAX_BANDS 3
 131
 132 enum {
 133         SCAN_SSID_FILTER_ANY      = 0,
 134         SCAN_SSID_FILTER_SPECIFIC = 1,
 135         SCAN_SSID_FILTER_LIST     = 2,
 136         SCAN_SSID_FILTER_DISABLED = 3
 137 };
 138
 139 enum {
 140         SCAN_BSS_TYPE_INDEPENDENT,
 141         SCAN_BSS_TYPE_INFRASTRUCTURE,
 142         SCAN_BSS_TYPE_ANY,
 143 };
 144
 145 #define SCAN_CHANNEL_FLAGS_DFS          BIT(0)
 146 #define SCAN_CHANNEL_FLAGS_DFS_ENABLED  BIT(1)
 147
 148 struct conn_scan_ch_params {
 149         __le16 min_duration;
 150         __le16 max_duration;
 151         __le16 passive_duration;
 152
 153         u8  channel;
 154         u8  tx_power_att;
 155
 156         /* bit 0: DFS channel; bit 1: DFS enabled */
 157         u8  flags;
 158
 159         u8  padding[3];
 160 } __packed;
 161
 162 struct wl1271_cmd_sched_scan_config {
 163         struct wl1271_cmd_header header;
 164
 165         __le32 intervals[SCAN_MAX_CYCLE_INTERVALS];
 166
 167         s8 rssi_threshold; /* for filtering (in dBm) */
 168         s8 snr_threshold;  /* for filtering (in dB) */
 169
 170         u8 cycles;       /* maximum number of scan cycles */
 171         u8 report_after; /* report when this number of results are received */
 172         u8 terminate;    /* stop scanning after reporting */
 173
 174         u8 tag;
 175         u8 bss_type; /* for filtering */
 176         u8 filter_type;
 177
 178         u8 ssid_len;     /* For SCAN_SSID_FILTER_SPECIFIC */
 179         u8 ssid[IEEE80211_MAX_SSID_LEN];
 180
 181         u8 n_probe_reqs; /* Number of probes requests per channel */
 182
 183         u8 passive[SCAN_MAX_BANDS];
 184         u8 active[SCAN_MAX_BANDS];
 185
 186         u8 dfs;
 187
 188         u8 padding[3];
 189
 190         struct conn_scan_ch_params channels_2[MAX_CHANNELS_2GHZ];
 191         struct conn_scan_ch_params channels_5[MAX_CHANNELS_5GHZ];
 192         struct conn_scan_ch_params channels_4[MAX_CHANNELS_4GHZ];
 193 } __packed;
 194
 195
 196 #define SCHED_SCAN_MAX_SSIDS 16
 197
 198 enum {
 199         SCAN_SSID_TYPE_PUBLIC = 0,
 200         SCAN_SSID_TYPE_HIDDEN = 1,
 201 };
 202
 203 struct wl1271_ssid {
 204         u8 type;
 205         u8 len;
 206         u8 ssid[IEEE80211_MAX_SSID_LEN];
 207         /* u8 padding[2]; */
 208 } __packed;
 209
 210 struct wl1271_cmd_sched_scan_ssid_list {
 211         struct wl1271_cmd_header header;
 212
 213         u8 n_ssids;
 214         struct wl1271_ssid ssids[SCHED_SCAN_MAX_SSIDS];
 215         u8 padding[3];
 216 } __packed;
 217
 218 struct wl1271_cmd_sched_scan_start {
 219         struct wl1271_cmd_header header;
 220
 221         u8 tag;
 222         u8 padding[3];
 223 } __packed;
 224
 225 struct wl1271_cmd_sched_scan_stop {
 226         struct wl1271_cmd_header header;
 227
 228         u8 tag;
 229         u8 padding[3];
 230 } __packed;
 231
 232
 233 #endif /* __WL1271_SCAN_H__ */