185 lines
4.1 KiB
C
Executable file
185 lines
4.1 KiB
C
Executable file
/*
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* This file is part of wl1251
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*
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* Copyright (C) 2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include "reg.h"
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#include "ps.h"
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#include "cmd.h"
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#include "io.h"
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/* in ms */
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#define WL1251_WAKEUP_TIMEOUT 100
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void wl1251_elp_work(struct work_struct *work)
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{
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struct delayed_work *dwork;
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struct wl1251 *wl;
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dwork = to_delayed_work(work);
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wl = container_of(dwork, struct wl1251, elp_work);
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wl1251_debug(DEBUG_PSM, "elp work");
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mutex_lock(&wl->mutex);
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if (wl->elp || wl->station_mode == STATION_ACTIVE_MODE)
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goto out;
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wl1251_debug(DEBUG_PSM, "chip to elp");
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wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
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wl->elp = true;
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out:
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mutex_unlock(&wl->mutex);
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}
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#define ELP_ENTRY_DELAY 5
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/* Routines to toggle sleep mode while in ELP */
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void wl1251_ps_elp_sleep(struct wl1251 *wl)
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{
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unsigned long delay;
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if (wl->station_mode != STATION_ACTIVE_MODE) {
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delay = msecs_to_jiffies(ELP_ENTRY_DELAY);
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ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay);
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}
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}
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int wl1251_ps_elp_wakeup(struct wl1251 *wl)
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{
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unsigned long timeout, start;
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u32 elp_reg;
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cancel_delayed_work(&wl->elp_work);
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if (!wl->elp)
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return 0;
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wl1251_debug(DEBUG_PSM, "waking up chip from elp");
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start = jiffies;
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timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
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wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
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elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
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/*
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* FIXME: we should wait for irq from chip but, as a temporary
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* solution to simplify locking, let's poll instead
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*/
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while (!(elp_reg & ELPCTRL_WLAN_READY)) {
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if (time_after(jiffies, timeout)) {
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wl1251_error("elp wakeup timeout");
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return -ETIMEDOUT;
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}
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msleep(1);
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elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
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}
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wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
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jiffies_to_msecs(jiffies - start));
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wl->elp = false;
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return 0;
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}
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int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_station_mode mode)
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{
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int ret;
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switch (mode) {
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case STATION_POWER_SAVE_MODE:
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wl1251_debug(DEBUG_PSM, "entering psm");
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/* enable beacon filtering */
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ret = wl1251_acx_beacon_filter_opt(wl, true);
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if (ret < 0)
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return ret;
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ret = wl1251_acx_wake_up_conditions(wl,
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WAKE_UP_EVENT_DTIM_BITMAP,
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wl->listen_int);
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if (ret < 0)
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return ret;
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ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_ENABLE,
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WL1251_DEFAULT_BET_CONSECUTIVE);
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if (ret < 0)
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return ret;
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ret = wl1251_cmd_ps_mode(wl, CHIP_POWER_SAVE_MODE);
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if (ret < 0)
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return ret;
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ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
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if (ret < 0)
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return ret;
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break;
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case STATION_IDLE:
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wl1251_debug(DEBUG_PSM, "entering idle");
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ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
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if (ret < 0)
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return ret;
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ret = wl1251_cmd_template_set(wl, CMD_DISCONNECT, NULL, 0);
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if (ret < 0)
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return ret;
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break;
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case STATION_ACTIVE_MODE:
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default:
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wl1251_debug(DEBUG_PSM, "leaving psm");
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ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM);
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if (ret < 0)
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return ret;
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/* disable BET */
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ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_DISABLE,
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WL1251_DEFAULT_BET_CONSECUTIVE);
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if (ret < 0)
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return ret;
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/* disable beacon filtering */
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ret = wl1251_acx_beacon_filter_opt(wl, false);
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if (ret < 0)
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return ret;
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ret = wl1251_acx_wake_up_conditions(wl,
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WAKE_UP_EVENT_DTIM_BITMAP,
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wl->listen_int);
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if (ret < 0)
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return ret;
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ret = wl1251_cmd_ps_mode(wl, CHIP_ACTIVE_MODE);
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if (ret < 0)
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return ret;
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break;
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}
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wl->station_mode = mode;
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return ret;
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}
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