+++ /dev/null
-/*
- * This file is part of wl1251
- *
- * Copyright (C) 2008 Nokia Corporation
- *
- * Contact: Kalle Valo <kalle.valo@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include "wl1251_reg.h"
-#include "wl1251_ps.h"
-#include "wl1251_cmd.h"
-#include "wl1251_io.h"
-
-/* in ms */
-#define WL1251_WAKEUP_TIMEOUT 100
-
-void wl1251_elp_work(struct work_struct *work)
-{
- struct delayed_work *dwork;
- struct wl1251 *wl;
-
- dwork = container_of(work, struct delayed_work, work);
- wl = container_of(dwork, struct wl1251, elp_work);
-
- wl1251_debug(DEBUG_PSM, "elp work");
-
- mutex_lock(&wl->mutex);
-
- if (wl->elp || !wl->psm)
- goto out;
-
- wl1251_debug(DEBUG_PSM, "chip to elp");
- wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
- wl->elp = true;
-
-out:
- mutex_unlock(&wl->mutex);
-}
-
-#define ELP_ENTRY_DELAY 5
-
-/* Routines to toggle sleep mode while in ELP */
-void wl1251_ps_elp_sleep(struct wl1251 *wl)
-{
- unsigned long delay;
-
- if (wl->psm) {
- cancel_delayed_work(&wl->elp_work);
- delay = msecs_to_jiffies(ELP_ENTRY_DELAY);
- ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay);
- }
-}
-
-int wl1251_ps_elp_wakeup(struct wl1251 *wl)
-{
- unsigned long timeout, start;
- u32 elp_reg;
-
- if (!wl->elp)
- return 0;
-
- wl1251_debug(DEBUG_PSM, "waking up chip from elp");
-
- start = jiffies;
- timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
-
- wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
-
- elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
-
- /*
- * FIXME: we should wait for irq from chip but, as a temporary
- * solution to simplify locking, let's poll instead
- */
- while (!(elp_reg & ELPCTRL_WLAN_READY)) {
- if (time_after(jiffies, timeout)) {
- wl1251_error("elp wakeup timeout");
- return -ETIMEDOUT;
- }
- msleep(1);
- elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
- }
-
- wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
- jiffies_to_msecs(jiffies - start));
-
- wl->elp = false;
-
- return 0;
-}
-
-static int wl1251_ps_set_elp(struct wl1251 *wl, bool enable)
-{
- int ret;
-
- if (enable) {
- wl1251_debug(DEBUG_PSM, "sleep auth psm/elp");
-
- ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
- if (ret < 0)
- return ret;
-
- wl1251_ps_elp_sleep(wl);
- } else {
- wl1251_debug(DEBUG_PSM, "sleep auth cam");
-
- /*
- * When the target is in ELP, we can only
- * access the ELP control register. Thus,
- * we have to wake the target up before
- * changing the power authorization.
- */
-
- wl1251_ps_elp_wakeup(wl);
-
- ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM);
- if (ret < 0)
- return ret;
- }
-
- return 0;
-}
-
-int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_cmd_ps_mode mode)
-{
- int ret;
-
- switch (mode) {
- case STATION_POWER_SAVE_MODE:
- wl1251_debug(DEBUG_PSM, "entering psm");
-
- /* enable beacon filtering */
- ret = wl1251_acx_beacon_filter_opt(wl, true);
- if (ret < 0)
- return ret;
-
- ret = wl1251_acx_wake_up_conditions(wl,
- WAKE_UP_EVENT_DTIM_BITMAP,
- wl->listen_int);
- if (ret < 0)
- return ret;
-
- ret = wl1251_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE);
- if (ret < 0)
- return ret;
-
- ret = wl1251_ps_set_elp(wl, true);
- if (ret < 0)
- return ret;
-
- wl->psm = 1;
- break;
- case STATION_ACTIVE_MODE:
- default:
- wl1251_debug(DEBUG_PSM, "leaving psm");
- ret = wl1251_ps_set_elp(wl, false);
- if (ret < 0)
- return ret;
-
- /* disable beacon filtering */
- ret = wl1251_acx_beacon_filter_opt(wl, false);
- if (ret < 0)
- return ret;
-
- ret = wl1251_acx_wake_up_conditions(wl,
- WAKE_UP_EVENT_DTIM_BITMAP,
- wl->listen_int);
- if (ret < 0)
- return ret;
-
- ret = wl1251_cmd_ps_mode(wl, STATION_ACTIVE_MODE);
- if (ret < 0)
- return ret;
-
- wl->psm = 0;
- break;
- }
-
- return ret;
-}
-
projects / mv-sheeva.git / blobdiff