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"
28 #define WL1271_WAKEUP_TIMEOUT 500
30 void wl1271_elp_work(struct work_struct *work)
32 struct delayed_work *dwork;
35 dwork = container_of(work, struct delayed_work, work);
36 wl = container_of(dwork, struct wl1271, elp_work);
38 wl1271_debug(DEBUG_PSM, "elp work");
40 mutex_lock(&wl->mutex);
42 if (wl->elp || !wl->psm)
45 wl1271_debug(DEBUG_PSM, "chip to elp");
46 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
50 mutex_unlock(&wl->mutex);
53 #define ELP_ENTRY_DELAY 5
55 /* Routines to toggle sleep mode while in ELP */
56 void wl1271_ps_elp_sleep(struct wl1271 *wl)
59 cancel_delayed_work(&wl->elp_work);
60 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
61 msecs_to_jiffies(ELP_ENTRY_DELAY));
65 int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
67 DECLARE_COMPLETION_ONSTACK(compl);
70 u32 start_time = jiffies;
76 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
79 * The spinlock is required here to synchronize both the work and
80 * the completion variable in one entity.
82 spin_lock_irqsave(&wl->wl_lock, flags);
83 if (work_pending(&wl->irq_work) || chip_awake)
86 wl->elp_compl = &compl;
87 spin_unlock_irqrestore(&wl->wl_lock, flags);
89 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
92 ret = wait_for_completion_timeout(
93 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
95 wl1271_error("ELP wakeup timeout!");
99 wl1271_error("ELP wakeup completion error.");
106 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
107 jiffies_to_msecs(jiffies - start_time));
111 spin_lock_irqsave(&wl->wl_lock, flags);
112 wl->elp_compl = NULL;
113 spin_unlock_irqrestore(&wl->wl_lock, flags);
120 int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode)
125 case STATION_POWER_SAVE_MODE:
126 wl1271_debug(DEBUG_PSM, "entering psm");
128 /* enable beacon filtering */
129 ret = wl1271_acx_beacon_filter_opt(wl, true);
133 /* enable beacon early termination */
134 ret = wl1271_acx_bet_enable(wl, true);
138 ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE);
142 wl1271_ps_elp_sleep(wl);
148 case STATION_ACTIVE_MODE:
150 wl1271_debug(DEBUG_PSM, "leaving psm");
151 ret = wl1271_ps_elp_wakeup(wl, false);
155 /* disable beacon early termination */
156 ret = wl1271_acx_bet_enable(wl, false);
160 /* disable beacon filtering */
161 ret = wl1271_acx_beacon_filter_opt(wl, false);
165 ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE);