diff options
Diffstat (limited to 'drivers/net/wireless/wl1251/ps.c')
| -rw-r--r-- | drivers/net/wireless/wl1251/ps.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/drivers/net/wireless/wl1251/ps.c b/drivers/net/wireless/wl1251/ps.c deleted file mode 100644 index 5ed47c8373d..00000000000 --- a/drivers/net/wireless/wl1251/ps.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * This file is part of wl1251 - * - * Copyright (C) 2008 Nokia Corporation - * - * 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 "reg.h" -#include "ps.h" -#include "cmd.h" -#include "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; -} - |