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
29 #define WL1271_WAKEUP_TIMEOUT 500
31 #define ELP_ENTRY_DELAY 30
32 #define ELP_ENTRY_DELAY_FORCE_PS 5
34 void wl1271_elp_work(struct work_struct *work)
36 struct delayed_work *dwork;
38 struct wl12xx_vif *wlvif;
41 dwork = container_of(work, struct delayed_work, work);
42 wl = container_of(dwork, struct wl1271, elp_work);
44 wl1271_debug(DEBUG_PSM, "elp work");
46 mutex_lock(&wl->mutex);
48 if (unlikely(wl->state != WLCORE_STATE_ON))
51 /* our work might have been already cancelled */
52 if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
55 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
58 wl12xx_for_each_wlvif(wl, wlvif) {
59 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
60 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
64 wl1271_debug(DEBUG_PSM, "chip to elp");
65 ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
67 wl12xx_queue_recovery_work(wl);
71 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
74 mutex_unlock(&wl->mutex);
77 /* Routines to toggle sleep mode while in ELP */
78 void wl1271_ps_elp_sleep(struct wl1271 *wl)
80 struct wl12xx_vif *wlvif;
83 /* We do not enter elp sleep in PLT mode */
87 if (wl->sleep_auth != WL1271_PSM_ELP)
90 /* we shouldn't get consecutive sleep requests */
91 if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
94 wl12xx_for_each_wlvif(wl, wlvif) {
95 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
96 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
100 timeout = wl->conf.conn.forced_ps ?
101 ELP_ENTRY_DELAY_FORCE_PS : ELP_ENTRY_DELAY;
102 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
103 msecs_to_jiffies(timeout));
105 EXPORT_SYMBOL_GPL(wl1271_ps_elp_sleep);
107 int wl1271_ps_elp_wakeup(struct wl1271 *wl)
109 DECLARE_COMPLETION_ONSTACK(compl);
112 unsigned long start_time = jiffies;
113 bool pending = false;
116 * we might try to wake up even if we didn't go to sleep
117 * before (e.g. on boot)
119 if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
122 /* don't cancel_sync as it might contend for a mutex and deadlock */
123 cancel_delayed_work(&wl->elp_work);
125 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
128 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
131 * The spinlock is required here to synchronize both the work and
132 * the completion variable in one entity.
134 spin_lock_irqsave(&wl->wl_lock, flags);
135 if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
138 wl->elp_compl = &compl;
139 spin_unlock_irqrestore(&wl->wl_lock, flags);
141 ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
143 wl12xx_queue_recovery_work(wl);
148 ret = wait_for_completion_timeout(
149 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
151 wl1271_error("ELP wakeup timeout!");
152 wl12xx_queue_recovery_work(wl);
158 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
160 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
161 jiffies_to_msecs(jiffies - start_time));
165 spin_lock_irqsave(&wl->wl_lock, flags);
166 wl->elp_compl = NULL;
167 spin_unlock_irqrestore(&wl->wl_lock, flags);
173 EXPORT_SYMBOL_GPL(wl1271_ps_elp_wakeup);
175 int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
176 enum wl1271_cmd_ps_mode mode)
179 u16 timeout = wl->conf.conn.dynamic_ps_timeout;
182 case STATION_AUTO_PS_MODE:
183 case STATION_POWER_SAVE_MODE:
184 wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
187 ret = wl1271_acx_wake_up_conditions(wl, wlvif,
188 wl->conf.conn.wake_up_event,
189 wl->conf.conn.listen_interval);
191 wl1271_error("couldn't set wake up conditions");
195 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
199 set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
202 * enable beacon early termination.
203 * Not relevant for 5GHz and for high rates.
205 if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
206 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
207 ret = wl1271_acx_bet_enable(wl, wlvif, true);
212 case STATION_ACTIVE_MODE:
213 wl1271_debug(DEBUG_PSM, "leaving psm");
215 /* disable beacon early termination */
216 if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
217 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
218 ret = wl1271_acx_bet_enable(wl, wlvif, false);
223 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
227 clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
230 wl1271_warning("trying to set ps to unsupported mode %d", mode);
237 static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
241 struct ieee80211_tx_info *info;
243 int filtered[NUM_TX_QUEUES];
244 struct wl1271_link *lnk = &wl->links[hlid];
246 /* filter all frames currently in the low level queues for this hlid */
247 for (i = 0; i < NUM_TX_QUEUES; i++) {
249 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
252 if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
255 info = IEEE80211_SKB_CB(skb);
256 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
257 info->status.rates[0].idx = -1;
258 ieee80211_tx_status_ni(wl->hw, skb);
262 spin_lock_irqsave(&wl->wl_lock, flags);
263 for (i = 0; i < NUM_TX_QUEUES; i++) {
264 wl->tx_queue_count[i] -= filtered[i];
266 lnk->wlvif->tx_queue_count[i] -= filtered[i];
268 spin_unlock_irqrestore(&wl->wl_lock, flags);
270 wl1271_handle_tx_low_watermark(wl);
273 void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
274 u8 hlid, bool clean_queues)
276 struct ieee80211_sta *sta;
277 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
279 if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
282 if (!test_bit(hlid, wlvif->ap.sta_hlid_map) ||
283 test_bit(hlid, &wl->ap_ps_map))
286 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
287 "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
291 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
293 wl1271_error("could not find sta %pM for starting ps",
294 wl->links[hlid].addr);
299 ieee80211_sta_ps_transition_ni(sta, true);
302 /* do we want to filter all frames from this link's queues? */
304 wl1271_ps_filter_frames(wl, hlid);
306 __set_bit(hlid, &wl->ap_ps_map);
309 void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
311 struct ieee80211_sta *sta;
312 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
314 if (!test_bit(hlid, &wl->ap_ps_map))
317 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
319 __clear_bit(hlid, &wl->ap_ps_map);
322 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
324 wl1271_error("could not find sta %pM for ending ps",
325 wl->links[hlid].addr);
329 ieee80211_sta_ps_transition_ni(sta, false);