2 * This file is part of wl1251
4 * Copyright (C) 2008 Nokia Corporation
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
28 #define WL1251_WAKEUP_TIMEOUT 100
30 void wl1251_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 wl1251, elp_work);
38 wl1251_debug(DEBUG_PSM, "elp work");
40 mutex_lock(&wl->mutex);
42 if (wl->elp || wl->station_mode == STATION_ACTIVE_MODE)
45 wl1251_debug(DEBUG_PSM, "chip to elp");
46 wl1251_write_elp(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 wl1251_ps_elp_sleep(struct wl1251 *wl)
60 if (wl->station_mode != STATION_ACTIVE_MODE) {
61 delay = msecs_to_jiffies(ELP_ENTRY_DELAY);
62 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay);
66 int wl1251_ps_elp_wakeup(struct wl1251 *wl)
68 unsigned long timeout, start;
71 if (delayed_work_pending(&wl->elp_work))
72 cancel_delayed_work(&wl->elp_work);
77 wl1251_debug(DEBUG_PSM, "waking up chip from elp");
80 timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
82 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
84 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
87 * FIXME: we should wait for irq from chip but, as a temporary
88 * solution to simplify locking, let's poll instead
90 while (!(elp_reg & ELPCTRL_WLAN_READY)) {
91 if (time_after(jiffies, timeout)) {
92 wl1251_error("elp wakeup timeout");
96 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
99 wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
100 jiffies_to_msecs(jiffies - start));
107 int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_station_mode mode)
112 case STATION_POWER_SAVE_MODE:
113 wl1251_debug(DEBUG_PSM, "entering psm");
115 ret = wl1251_acx_wake_up_conditions(wl,
116 WAKE_UP_EVENT_DTIM_BITMAP,
121 #if 0 /* problems seen on one router */
122 ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_ENABLE,
123 WL1251_DEFAULT_BET_CONSECUTIVE);
128 ret = wl1251_cmd_ps_mode(wl, CHIP_POWER_SAVE_MODE);
132 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
137 wl1251_debug(DEBUG_PSM, "entering idle");
139 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
143 ret = wl1251_cmd_template_set(wl, CMD_DISCONNECT, NULL, 0);
147 case STATION_ACTIVE_MODE:
149 wl1251_debug(DEBUG_PSM, "leaving psm");
151 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM);
157 ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_DISABLE,
158 WL1251_DEFAULT_BET_CONSECUTIVE);
163 /* disable beacon filtering */
164 ret = wl1251_acx_beacon_filter_opt(wl, false);
168 ret = wl1251_acx_wake_up_conditions(wl,
169 WAKE_UP_EVENT_DTIM_BITMAP,
174 ret = wl1251_cmd_ps_mode(wl, CHIP_ACTIVE_MODE);
180 wl->station_mode = mode;
181 wl->ps_transitioning = true;
182 wl->ps_change_jiffies = jiffies;