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 #define WL1271_WAKEUP_TIMEOUT 500
32 void wl1271_elp_work(struct work_struct *work)
34 struct delayed_work *dwork;
36 struct wl12xx_vif *wlvif;
38 dwork = container_of(work, struct delayed_work, work);
39 wl = container_of(dwork, struct wl1271, elp_work);
41 wl1271_debug(DEBUG_PSM, "elp work");
43 mutex_lock(&wl->mutex);
45 if (unlikely(wl->state == WL1271_STATE_OFF))
48 /* our work might have been already cancelled */
49 if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
52 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
55 wl12xx_for_each_wlvif(wl, wlvif) {
56 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
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 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
66 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
69 mutex_unlock(&wl->mutex);
72 /* Routines to toggle sleep mode while in ELP */
73 void wl1271_ps_elp_sleep(struct wl1271 *wl)
75 struct wl12xx_vif *wlvif;
77 /* we shouldn't get consecutive sleep requests */
78 if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
81 wl12xx_for_each_wlvif(wl, wlvif) {
82 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
85 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
86 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
90 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
91 msecs_to_jiffies(wl->conf.conn.dynamic_ps_timeout));
94 int wl1271_ps_elp_wakeup(struct wl1271 *wl)
96 DECLARE_COMPLETION_ONSTACK(compl);
99 u32 start_time = jiffies;
100 bool pending = false;
103 * we might try to wake up even if we didn't go to sleep
104 * before (e.g. on boot)
106 if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
109 /* don't cancel_sync as it might contend for a mutex and deadlock */
110 cancel_delayed_work(&wl->elp_work);
112 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
115 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
118 * The spinlock is required here to synchronize both the work and
119 * the completion variable in one entity.
121 spin_lock_irqsave(&wl->wl_lock, flags);
122 if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
125 wl->elp_compl = &compl;
126 spin_unlock_irqrestore(&wl->wl_lock, flags);
128 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
131 ret = wait_for_completion_timeout(
132 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
134 wl1271_error("ELP wakeup timeout!");
135 wl12xx_queue_recovery_work(wl);
138 } else if (ret < 0) {
139 wl1271_error("ELP wakeup completion error.");
144 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
146 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
147 jiffies_to_msecs(jiffies - start_time));
151 spin_lock_irqsave(&wl->wl_lock, flags);
152 wl->elp_compl = NULL;
153 spin_unlock_irqrestore(&wl->wl_lock, flags);
160 int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
161 enum wl1271_cmd_ps_mode mode)
164 u16 timeout = wl->conf.conn.dynamic_ps_timeout;
167 case STATION_AUTO_PS_MODE:
168 case STATION_POWER_SAVE_MODE:
169 wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
172 ret = wl1271_acx_wake_up_conditions(wl, wlvif,
173 wl->conf.conn.wake_up_event,
174 wl->conf.conn.listen_interval);
176 wl1271_error("couldn't set wake up conditions");
180 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
184 set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
186 /* enable beacon early termination. Not relevant for 5GHz */
187 if (wlvif->band == IEEE80211_BAND_2GHZ) {
188 ret = wl1271_acx_bet_enable(wl, wlvif, true);
193 case STATION_ACTIVE_MODE:
194 wl1271_debug(DEBUG_PSM, "leaving psm");
196 /* disable beacon early termination */
197 if (wlvif->band == IEEE80211_BAND_2GHZ) {
198 ret = wl1271_acx_bet_enable(wl, wlvif, false);
203 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
207 clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
210 wl1271_warning("trying to set ps to unsupported mode %d", mode);
217 static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
221 struct ieee80211_tx_info *info;
223 int filtered[NUM_TX_QUEUES];
225 /* filter all frames currently in the low level queues for this hlid */
226 for (i = 0; i < NUM_TX_QUEUES; i++) {
228 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
231 if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
234 info = IEEE80211_SKB_CB(skb);
235 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
236 info->status.rates[0].idx = -1;
237 ieee80211_tx_status_ni(wl->hw, skb);
241 spin_lock_irqsave(&wl->wl_lock, flags);
242 for (i = 0; i < NUM_TX_QUEUES; i++)
243 wl->tx_queue_count[i] -= filtered[i];
244 spin_unlock_irqrestore(&wl->wl_lock, flags);
246 wl1271_handle_tx_low_watermark(wl);
249 void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
250 u8 hlid, bool clean_queues)
252 struct ieee80211_sta *sta;
253 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
255 if (test_bit(hlid, &wl->ap_ps_map))
258 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
259 "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
263 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
265 wl1271_error("could not find sta %pM for starting ps",
266 wl->links[hlid].addr);
271 ieee80211_sta_ps_transition_ni(sta, true);
274 /* do we want to filter all frames from this link's queues? */
276 wl1271_ps_filter_frames(wl, hlid);
278 __set_bit(hlid, &wl->ap_ps_map);
281 void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
283 struct ieee80211_sta *sta;
284 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
286 if (!test_bit(hlid, &wl->ap_ps_map))
289 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
291 __clear_bit(hlid, &wl->ap_ps_map);
294 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
296 wl1271_error("could not find sta %pM for ending ps",
297 wl->links[hlid].addr);
301 ieee80211_sta_ps_transition_ni(sta, false);