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
 29int wl1271_scan(struct wl1271 *wl, const u8 *ssid, size_t ssid_len,
 30		struct cfg80211_scan_request *req);
 31int wl1271_scan_stop(struct wl1271 *wl);
 32int wl1271_scan_build_probe_req(struct wl1271 *wl,
 33				const u8 *ssid, size_t ssid_len,
 34				const u8 *ie, size_t ie_len, u8 band);
 35void wl1271_scan_stm(struct wl1271 *wl);
 36void wl1271_scan_complete_work(struct work_struct *work);
 37int wl1271_scan_sched_scan_config(struct wl1271 *wl,
 38				     struct cfg80211_sched_scan_request *req,
 39				     struct ieee80211_sched_scan_ies *ies);
 40int wl1271_scan_sched_scan_start(struct wl1271 *wl);
 41void wl1271_scan_sched_scan_stop(struct wl1271 *wl);
 42void wl1271_scan_sched_scan_results(struct wl1271 *wl);
 43
 44#define WL1271_SCAN_MAX_CHANNELS       24
 45#define WL1271_SCAN_DEFAULT_TAG        1
 46#define WL1271_SCAN_CURRENT_TX_PWR     0
 47#define WL1271_SCAN_OPT_ACTIVE         0
 48#define WL1271_SCAN_OPT_PASSIVE	       1
 49#define WL1271_SCAN_OPT_PRIORITY_HIGH  4
 50#define WL1271_SCAN_BAND_2_4_GHZ 0
 51#define WL1271_SCAN_BAND_5_GHZ 1
 52
 53#define WL1271_SCAN_TIMEOUT    10000 /* msec */
 54
 55enum {
 56	WL1271_SCAN_STATE_IDLE,
 57	WL1271_SCAN_STATE_2GHZ_ACTIVE,
 58	WL1271_SCAN_STATE_2GHZ_PASSIVE,
 59	WL1271_SCAN_STATE_5GHZ_ACTIVE,
 60	WL1271_SCAN_STATE_5GHZ_PASSIVE,
 61	WL1271_SCAN_STATE_DONE
 62};
 63
 64struct basic_scan_params {
 65	__le32 rx_config_options;
 66	__le32 rx_filter_options;
 67	/* Scan option flags (WL1271_SCAN_OPT_*) */
 68	__le16 scan_options;
 69	/* Number of scan channels in the list (maximum 30) */
 70	u8 n_ch;
 71	/* This field indicates the number of probe requests to send
 72	   per channel for an active scan */
 73	u8 n_probe_reqs;
 74	/* Rate bit field for sending the probes */
 75	__le32 tx_rate;
 76	u8 tid_trigger;
 77	u8 ssid_len;
 78	/* in order to align */
 79	u8 padding1[2];
 80	u8 ssid[IW_ESSID_MAX_SIZE];
 81	/* Band to scan */
 82	u8 band;
 83	u8 use_ssid_list;
 84	u8 scan_tag;
 85	u8 padding2;
 86} __packed;
 87
 88struct basic_scan_channel_params {
 89	/* Duration in TU to wait for frames on a channel for active scan */
 90	__le32 min_duration;
 91	__le32 max_duration;
 92	__le32 bssid_lsb;
 93	__le16 bssid_msb;
 94	u8 early_termination;
 95	u8 tx_power_att;
 96	u8 channel;
 97	/* FW internal use only! */
 98	u8 dfs_candidate;
 99	u8 activity_detected;
100	u8 pad;
101} __packed;
102
103struct wl1271_cmd_scan {
104	struct wl1271_cmd_header header;
105
106	struct basic_scan_params params;
107	struct basic_scan_channel_params channels[WL1271_SCAN_MAX_CHANNELS];
108} __packed;
109
110struct wl1271_cmd_trigger_scan_to {
111	struct wl1271_cmd_header header;
112
113	__le32 timeout;
114} __packed;
115
116#define MAX_CHANNELS_2GHZ	14
117#define MAX_CHANNELS_5GHZ	23
118#define MAX_CHANNELS_4GHZ	4
119
120#define SCAN_MAX_CYCLE_INTERVALS 16
121#define SCAN_MAX_BANDS 3
122
123enum {
124	SCAN_SSID_FILTER_ANY      = 0,
125	SCAN_SSID_FILTER_SPECIFIC = 1,
126	SCAN_SSID_FILTER_LIST     = 2,
127	SCAN_SSID_FILTER_DISABLED = 3
128};
129
130enum {
131	SCAN_BSS_TYPE_INDEPENDENT,
132	SCAN_BSS_TYPE_INFRASTRUCTURE,
133	SCAN_BSS_TYPE_ANY,
134};
135
136#define SCAN_CHANNEL_FLAGS_DFS		BIT(0)
137#define SCAN_CHANNEL_FLAGS_DFS_ENABLED	BIT(1)
138
139struct conn_scan_ch_params {
140	__le16 min_duration;
141	__le16 max_duration;
142	__le16 passive_duration;
143
144	u8  channel;
145	u8  tx_power_att;
146
147	/* bit 0: DFS channel; bit 1: DFS enabled */
148	u8  flags;
149
150	u8  padding[3];
151} __packed;
152
153struct wl1271_cmd_sched_scan_config {
154	struct wl1271_cmd_header header;
155
156	__le32 intervals[SCAN_MAX_CYCLE_INTERVALS];
157
158	s8 rssi_threshold; /* for filtering (in dBm) */
159	s8 snr_threshold;  /* for filtering (in dB) */
160
161	u8 cycles;       /* maximum number of scan cycles */
162	u8 report_after; /* report when this number of results are received */
163	u8 terminate;    /* stop scanning after reporting */
164
165	u8 tag;
166	u8 bss_type; /* for filtering */
167	u8 filter_type;
168
169	u8 ssid_len;     /* For SCAN_SSID_FILTER_SPECIFIC */
170	u8 ssid[IW_ESSID_MAX_SIZE];
171
172	u8 n_probe_reqs; /* Number of probes requests per channel */
173
174	u8 passive[SCAN_MAX_BANDS];
175	u8 active[SCAN_MAX_BANDS];
176
177	u8 dfs;
178
179	u8 padding[3];
180
181	struct conn_scan_ch_params channels_2[MAX_CHANNELS_2GHZ];
182	struct conn_scan_ch_params channels_5[MAX_CHANNELS_5GHZ];
183	struct conn_scan_ch_params channels_4[MAX_CHANNELS_4GHZ];
184} __packed;
185
186
187#define SCHED_SCAN_MAX_SSIDS 8
188
189enum {
190	SCAN_SSID_TYPE_PUBLIC = 0,
191	SCAN_SSID_TYPE_HIDDEN = 1,
192};
193
194struct wl1271_ssid {
195	u8 type;
196	u8 len;
197	u8 ssid[IW_ESSID_MAX_SIZE];
198	/* u8 padding[2]; */
199} __packed;
200
201struct wl1271_cmd_sched_scan_ssid_list {
202	struct wl1271_cmd_header header;
203
204	u8 n_ssids;
205	struct wl1271_ssid ssids[SCHED_SCAN_MAX_SSIDS];
206	u8 padding[3];
207} __packed;
208
209struct wl1271_cmd_sched_scan_start {
210	struct wl1271_cmd_header header;
211
212	u8 tag;
213	u8 padding[3];
214} __packed;
215
216struct wl1271_cmd_sched_scan_stop {
217	struct wl1271_cmd_header header;
218
219	u8 tag;
220	u8 padding[3];
221} __packed;
222
223
224#endif /* __WL1271_SCAN_H__ */