162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
|
/*
|
||
|
|
* 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"
|
||
|
|
|
||
|
|
#define WL1251_WAKEUP_TIMEOUT 2000
|
||
|
|
|
||
|
|
/* Routines to toggle sleep mode while in ELP */
|
||
|
|
void wl1251_ps_elp_sleep(struct wl1251 *wl)
|
||
|
|
{
|
||
|
|
if (wl->elp || !wl->psm)
|
||
|
|
return;
|
||
|
|
|
||
|
|
wl1251_debug(DEBUG_PSM, "chip to elp");
|
||
|
|
|
||
|
|
wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
|
||
|
|
|
||
|
|
wl->elp = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
int wl1251_ps_elp_wakeup(struct wl1251 *wl)
|
||
|
|
{
|
||
|
|
unsigned long timeout;
|
||
|
|
u32 elp_reg;
|
||
|
|
|
||
|
|
if (!wl->elp)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
wl1251_debug(DEBUG_PSM, "waking up chip from elp");
|
||
|
|
|
||
|
|
timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
|
||
|
|
|
||
|
|
wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
|
||
|
|
|
||
|
|
elp_reg = wl1251_read32(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_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
|
||
|
|
}
|
||
|
|
|
||
|
|
wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
|
||
|
|
jiffies_to_msecs(jiffies) -
|
||
|
|
(jiffies_to_msecs(timeout) - WL1251_WAKEUP_TIMEOUT));
|
||
|
|
|
||
|
|
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");
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|