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 void wl1271_elp_work(struct work_struct *work)
33 struct delayed_work *dwork;
36 dwork = container_of(work, struct delayed_work, work);
37 wl = container_of(dwork, struct wl1271, elp_work);
39 wl1271_debug(DEBUG_PSM, "elp work");
41 mutex_lock(&wl->mutex);
43 if (unlikely(wl->state == WL1271_STATE_OFF))
46 /* our work might have been already cancelled */
47 if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
50 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags) ||
51 (!test_bit(WL1271_FLAG_PSM, &wl->flags) &&
52 !test_bit(WL1271_FLAG_IDLE, &wl->flags)))
55 wl1271_debug(DEBUG_PSM, "chip to elp");
56 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
57 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
60 mutex_unlock(&wl->mutex);
63 #define ELP_ENTRY_DELAY 5
65 /* Routines to toggle sleep mode while in ELP */
66 void wl1271_ps_elp_sleep(struct wl1271 *wl)
68 /* we shouldn't get consecutive sleep requests */
69 if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
72 if (!test_bit(WL1271_FLAG_PSM, &wl->flags) &&
73 !test_bit(WL1271_FLAG_IDLE, &wl->flags))
76 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
77 msecs_to_jiffies(ELP_ENTRY_DELAY));
80 int wl1271_ps_elp_wakeup(struct wl1271 *wl)
82 DECLARE_COMPLETION_ONSTACK(compl);
85 u32 start_time = jiffies;
89 * we might try to wake up even if we didn't go to sleep
90 * before (e.g. on boot)
92 if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
95 /* don't cancel_sync as it might contend for a mutex and deadlock */
96 cancel_delayed_work(&wl->elp_work);
98 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
101 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
104 * The spinlock is required here to synchronize both the work and
105 * the completion variable in one entity.
107 spin_lock_irqsave(&wl->wl_lock, flags);
108 if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
111 wl->elp_compl = &compl;
112 spin_unlock_irqrestore(&wl->wl_lock, flags);
114 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
117 ret = wait_for_completion_timeout(
118 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
120 wl1271_error("ELP wakeup timeout!");
121 wl12xx_queue_recovery_work(wl);
124 } else if (ret < 0) {
125 wl1271_error("ELP wakeup completion error.");
130 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
132 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
133 jiffies_to_msecs(jiffies - start_time));
137 spin_lock_irqsave(&wl->wl_lock, flags);
138 wl->elp_compl = NULL;
139 spin_unlock_irqrestore(&wl->wl_lock, flags);
146 int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode,
147 u32 rates, bool send)
152 case STATION_POWER_SAVE_MODE:
153 wl1271_debug(DEBUG_PSM, "entering psm");
155 ret = wl1271_acx_wake_up_conditions(wl);
157 wl1271_error("couldn't set wake up conditions");
161 ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE);
165 set_bit(WL1271_FLAG_PSM, &wl->flags);
167 case STATION_ACTIVE_MODE:
169 wl1271_debug(DEBUG_PSM, "leaving psm");
171 /* disable beacon early termination */
172 if (wl->band == IEEE80211_BAND_2GHZ) {
173 ret = wl1271_acx_bet_enable(wl, false);
178 /* disable beacon filtering */
179 ret = wl1271_acx_beacon_filter_opt(wl, false);
183 ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE);
187 clear_bit(WL1271_FLAG_PSM, &wl->flags);
194 static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
198 struct ieee80211_tx_info *info;
200 int filtered[NUM_TX_QUEUES];
202 /* filter all frames currently the low level queus for this hlid */
203 for (i = 0; i < NUM_TX_QUEUES; i++) {
205 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
206 info = IEEE80211_SKB_CB(skb);
207 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
208 info->status.rates[0].idx = -1;
209 ieee80211_tx_status_ni(wl->hw, skb);
214 spin_lock_irqsave(&wl->wl_lock, flags);
215 for (i = 0; i < NUM_TX_QUEUES; i++)
216 wl->tx_queue_count[i] -= filtered[i];
217 spin_unlock_irqrestore(&wl->wl_lock, flags);
219 wl1271_handle_tx_low_watermark(wl);
222 void wl1271_ps_link_start(struct wl1271 *wl, u8 hlid, bool clean_queues)
224 struct ieee80211_sta *sta;
226 if (test_bit(hlid, &wl->ap_ps_map))
229 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d blks %d "
230 "clean_queues %d", hlid, wl->links[hlid].allocated_blks,
234 sta = ieee80211_find_sta(wl->vif, wl->links[hlid].addr);
236 wl1271_error("could not find sta %pM for starting ps",
237 wl->links[hlid].addr);
242 ieee80211_sta_ps_transition_ni(sta, true);
245 /* do we want to filter all frames from this link's queues? */
247 wl1271_ps_filter_frames(wl, hlid);
249 __set_bit(hlid, &wl->ap_ps_map);
252 void wl1271_ps_link_end(struct wl1271 *wl, u8 hlid)
254 struct ieee80211_sta *sta;
256 if (!test_bit(hlid, &wl->ap_ps_map))
259 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
261 __clear_bit(hlid, &wl->ap_ps_map);
264 sta = ieee80211_find_sta(wl->vif, wl->links[hlid].addr);
266 wl1271_error("could not find sta %pM for ending ps",
267 wl->links[hlid].addr);
271 ieee80211_sta_ps_transition_ni(sta, false);