2 * This file is part of wl1271
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
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.
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.
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
30 #include "wl12xx_80211.h"
32 void wl1271_pspoll_work(struct work_struct *work)
34 struct delayed_work *dwork;
38 dwork = container_of(work, struct delayed_work, work);
39 wl = container_of(dwork, struct wl1271, pspoll_work);
41 wl1271_debug(DEBUG_EVENT, "pspoll work");
43 mutex_lock(&wl->mutex);
45 if (unlikely(wl->state == WL1271_STATE_OFF))
48 if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
51 if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
55 * if we end up here, then we were in powersave when the pspoll
56 * delivery failure occurred, and no-one changed state since, so
57 * we should go back to powersave.
59 ret = wl1271_ps_elp_wakeup(wl);
63 wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true);
65 wl1271_ps_elp_sleep(wl);
67 mutex_unlock(&wl->mutex);
70 static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl)
72 int delay = wl->conf.conn.ps_poll_recovery_period;
75 wl->ps_poll_failures++;
76 if (wl->ps_poll_failures == 1)
77 wl1271_info("AP with dysfunctional ps-poll, "
78 "trying to work around it.");
80 /* force active mode receive data from the AP */
81 if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
82 ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
83 wl->basic_rate, true);
86 set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
87 ieee80211_queue_delayed_work(wl->hw, &wl->pspoll_work,
88 msecs_to_jiffies(delay));
92 * If already in active mode, lets we should be getting data from
93 * the AP right away. If we enter PSM too fast after this, and data
94 * remains on the AP, we will get another event like this, and we'll
95 * go into active once more.
99 static int wl1271_event_ps_report(struct wl1271 *wl,
100 struct event_mailbox *mbox,
104 u32 total_retries = wl->conf.conn.psm_entry_retries;
106 wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
108 switch (mbox->ps_status) {
109 case EVENT_ENTER_POWER_SAVE_FAIL:
110 wl1271_debug(DEBUG_PSM, "PSM entry failed");
112 if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
113 /* remain in active mode */
114 wl->psm_entry_retry = 0;
118 if (wl->psm_entry_retry < total_retries) {
119 wl->psm_entry_retry++;
120 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
121 wl->basic_rate, true);
123 wl1271_info("No ack to nullfunc from AP.");
124 wl->psm_entry_retry = 0;
128 case EVENT_ENTER_POWER_SAVE_SUCCESS:
129 wl->psm_entry_retry = 0;
131 /* enable beacon filtering */
132 ret = wl1271_acx_beacon_filter_opt(wl, true);
136 /* enable beacon early termination */
137 ret = wl1271_acx_bet_enable(wl, true);
146 static void wl1271_event_rssi_trigger(struct wl1271 *wl,
147 struct event_mailbox *mbox)
149 enum nl80211_cqm_rssi_threshold_event event;
150 s8 metric = mbox->rssi_snr_trigger_metric[0];
152 wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
154 if (metric <= wl->rssi_thold)
155 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
157 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
159 if (event != wl->last_rssi_event)
160 ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
161 wl->last_rssi_event = event;
164 static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
166 wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
167 wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
168 wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
171 static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
175 bool beacon_loss = false;
176 bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
177 bool disconnect_sta = false;
178 unsigned long sta_bitmap = 0;
180 wl1271_event_mbox_dump(mbox);
182 vector = le32_to_cpu(mbox->events_vector);
183 vector &= ~(le32_to_cpu(mbox->events_mask));
184 wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
186 if (vector & SCAN_COMPLETE_EVENT_ID) {
187 wl1271_debug(DEBUG_EVENT, "status: 0x%x",
188 mbox->scheduled_scan_status);
193 /* disable dynamic PS when requested by the firmware */
194 if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
195 wl->bss_type == BSS_TYPE_STA_BSS) {
196 if (mbox->soft_gemini_sense_info)
197 ieee80211_disable_dyn_ps(wl->vif);
199 ieee80211_enable_dyn_ps(wl->vif);
203 * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
204 * filtering) is enabled. Without PSM, the stack will receive all
205 * beacons and can detect beacon loss by itself.
207 * As there's possibility that the driver disables PSM before receiving
208 * BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
211 if ((vector & BSS_LOSE_EVENT_ID) && !is_ap) {
212 wl1271_info("Beacon loss detected.");
214 /* indicate to the stack, that beacons have been lost */
218 if ((vector & PS_REPORT_EVENT_ID) && !is_ap) {
219 wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
220 ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
225 if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap)
226 wl1271_event_pspoll_delivery_fail(wl);
228 if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
229 wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
231 wl1271_event_rssi_trigger(wl, mbox);
234 if ((vector & DUMMY_PACKET_EVENT_ID) && !is_ap) {
235 wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
237 wl1271_tx_dummy_packet(wl);
241 * "TX retries exceeded" has a different meaning according to mode.
242 * In AP mode the offending station is disconnected. In STA mode we
243 * report connection loss.
245 if (vector & MAX_TX_RETRY_EVENT_ID) {
246 wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
248 sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
249 disconnect_sta = true;
255 if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
256 wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
257 sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
258 disconnect_sta = true;
261 if (wl->vif && beacon_loss)
262 ieee80211_connection_loss(wl->vif);
264 if (is_ap && disconnect_sta) {
265 u32 num_packets = wl->conf.tx.max_tx_retries;
266 struct ieee80211_sta *sta;
270 for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
272 h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
273 if (!wl1271_is_active_sta(wl, h))
276 addr = wl->links[h].addr;
279 sta = ieee80211_find_sta(wl->vif, addr);
281 wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
282 ieee80211_report_low_ack(sta, num_packets);
291 int wl1271_event_unmask(struct wl1271 *wl)
295 ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
302 void wl1271_event_mbox_config(struct wl1271 *wl)
304 wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
305 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
307 wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
308 wl->mbox_ptr[0], wl->mbox_ptr[1]);
311 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
313 struct event_mailbox mbox;
316 wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
321 /* first we read the mbox descriptor */
322 wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
323 sizeof(struct event_mailbox), false);
325 /* process the descriptor */
326 ret = wl1271_event_process(wl, &mbox);
330 /* then we let the firmware know it can go on...*/
331 wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);