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
24 #include "wl1271_reg.h"
25 #include "wl1271_ps.h"
26 #include "wl1271_spi.h"
27 #include "wl1271_io.h"
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 (test_bit(WL1271_FLAG_IN_ELP, &wl->flags) ||
44 !test_bit(WL1271_FLAG_PSM, &wl->flags))
47 wl1271_debug(DEBUG_PSM, "chip to elp");
48 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
49 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
52 mutex_unlock(&wl->mutex);
55 #define ELP_ENTRY_DELAY 5
57 /* Routines to toggle sleep mode while in ELP */
58 void wl1271_ps_elp_sleep(struct wl1271 *wl)
60 if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
61 cancel_delayed_work(&wl->elp_work);
62 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
63 msecs_to_jiffies(ELP_ENTRY_DELAY));
67 int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
69 DECLARE_COMPLETION_ONSTACK(compl);
72 u32 start_time = jiffies;
75 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
78 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
81 * The spinlock is required here to synchronize both the work and
82 * the completion variable in one entity.
84 spin_lock_irqsave(&wl->wl_lock, flags);
85 if (work_pending(&wl->irq_work) || chip_awake)
88 wl->elp_compl = &compl;
89 spin_unlock_irqrestore(&wl->wl_lock, flags);
91 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
94 ret = wait_for_completion_timeout(
95 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
97 wl1271_error("ELP wakeup timeout!");
100 } else if (ret < 0) {
101 wl1271_error("ELP wakeup completion error.");
106 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
108 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
109 jiffies_to_msecs(jiffies - start_time));
113 spin_lock_irqsave(&wl->wl_lock, flags);
114 wl->elp_compl = NULL;
115 spin_unlock_irqrestore(&wl->wl_lock, flags);
122 int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode,
128 case STATION_POWER_SAVE_MODE:
129 wl1271_debug(DEBUG_PSM, "entering psm");
131 ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE, send);
135 set_bit(WL1271_FLAG_PSM, &wl->flags);
137 case STATION_ACTIVE_MODE:
139 wl1271_debug(DEBUG_PSM, "leaving psm");
140 ret = wl1271_ps_elp_wakeup(wl, false);
144 /* disable beacon early termination */
145 ret = wl1271_acx_bet_enable(wl, false);
149 /* disable beacon filtering */
150 ret = wl1271_acx_beacon_filter_opt(wl, false);
154 ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE, send);
158 clear_bit(WL1271_FLAG_PSM, &wl->flags);