[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-power.c

/******************************************************************************
 *
 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License 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 Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *****************************************************************************/


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>

#include <net/mac80211.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-commands.h"
#include "iwl-debug.h"
#include "iwl-power.h"

/*
 * Setting power level allow the card to go to sleep when not busy
 * there are three factor that decide the power level to go to, they
 * are list here with its priority
 *  1- critical_power_setting this will be set according to card temperature.
 *  2- system_power_setting this will be set by system PM manager.
 *  3- user_power_setting this will be set by user either by writing to sys or
 *  	mac80211
 *
 * if system_power_setting and user_power_setting is set to auto
 * the power level will be decided according to association status and battery
 * status.
 *
 */

#define MSEC_TO_USEC 1024
#define IWL_POWER_RANGE_0_MAX  (2)
#define IWL_POWER_RANGE_1_MAX  (10)


#define IWL_POWER_ON_BATTERY		IWL_POWER_INDEX_5
#define IWL_POWER_ON_AC_DISASSOC	IWL_POWER_MODE_CAM
#define IWL_POWER_ON_AC_ASSOC		IWL_POWER_MODE_CAM


#define IWL_CT_KILL_TEMPERATURE		110
#define IWL_MIN_POWER_TEMPERATURE	100
#define IWL_REDUCED_POWER_TEMPERATURE	95

/* default power management (not Tx power) table values */
/* for TIM  0-10 */
static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
};


/* for TIM = 3-10 */
static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
};

/* for TIM > 11 */
static struct iwl_power_vec_entry range_2[IWL_POWER_MAX] = {
	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
};


/* set card power command */
static int iwl_set_power(struct iwl_priv *priv, void *cmd)
{
	return iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
				      sizeof(struct iwl_powertable_cmd),
				      cmd, NULL);
}
/* decide the right power level according to association status
 * and battery status
 */
static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
{
	u16 mode;

	switch (priv->power_data.user_power_setting) {
	case IWL_POWER_AUTO:
		/* if running on battery */
		if (priv->power_data.is_battery_active)
			mode = IWL_POWER_ON_BATTERY;
		else if (iwl_is_associated(priv))
			mode = IWL_POWER_ON_AC_ASSOC;
		else
			mode = IWL_POWER_ON_AC_DISASSOC;
		break;
	default:
		mode = priv->power_data.user_power_setting;
		break;
	}
	return mode;
}

/* initialize to default */
static void iwl_power_init_handle(struct iwl_priv *priv)
{
	struct iwl_power_mgr *pow_data;
	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
	struct iwl_powertable_cmd *cmd;
	int i;
	u16 pci_pm;

	IWL_DEBUG_POWER(priv, "Initialize power \n");

	pow_data = &priv->power_data;

	memset(pow_data, 0, sizeof(*pow_data));

	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
	memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);

	pci_read_config_word(priv->pci_dev, PCI_CFG_LINK_CTRL, &pci_pm);

	IWL_DEBUG_POWER(priv, "adjust power command flags\n");

	for (i = 0; i < IWL_POWER_MAX; i++) {
		cmd = &pow_data->pwr_range_0[i].cmd;

		if (pci_pm & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
			cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
		else
			cmd->flags |= IWL_POWER_PCI_PM_MSK;
	}
}

/* adjust power command according to DTIM period and power level*/
static int iwl_update_power_cmd(struct iwl_priv *priv,
				struct iwl_powertable_cmd *cmd, u16 mode)
{
	struct iwl_power_vec_entry *range;
	struct iwl_power_mgr *pow_data;
	int i;
	u32 max_sleep = 0;
	u8 period;
	bool skip;

	if (mode > IWL_POWER_INDEX_5) {
		IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
		return -EINVAL;
	}

	pow_data = &priv->power_data;

	if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
		range = &pow_data->pwr_range_0[0];
	else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
		range = &pow_data->pwr_range_1[0];
	else
		range = &pow_data->pwr_range_2[0];

	period = pow_data->dtim_period;
	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));

	if (period == 0) {
		period = 1;
		skip = false;
	} else {
		skip = !!range[mode].no_dtim;
	}

	if (skip) {
		__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
		max_sleep = le32_to_cpu(slp_itrvl);
		if (max_sleep == 0xFF)
			max_sleep = period * (skip + 1);
		else if (max_sleep >  period)
			max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
		cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
	} else {
		max_sleep = period;
		cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
	}

	for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
		if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
			cmd->sleep_interval[i] = cpu_to_le32(max_sleep);

	IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
	IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
			le32_to_cpu(cmd->sleep_interval[0]),
			le32_to_cpu(cmd->sleep_interval[1]),
			le32_to_cpu(cmd->sleep_interval[2]),
			le32_to_cpu(cmd->sleep_interval[3]),
			le32_to_cpu(cmd->sleep_interval[4]));

	return 0;
}


/*
 * compute the final power mode index
 */
int iwl_power_update_mode(struct iwl_priv *priv, bool force)
{
	struct iwl_power_mgr *setting = &(priv->power_data);
	int ret = 0;
	u16 uninitialized_var(final_mode);
	bool update_chains;

	/* Don't update the RX chain when chain noise calibration is running */
	update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
			priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;

	/* If on battery, set to 3,
	 * if plugged into AC power, set to CAM ("continuously aware mode"),
	 * else user level */

	switch (setting->system_power_setting) {
	case IWL_POWER_SYS_AUTO:
		final_mode = iwl_get_auto_power_mode(priv);
		break;
	case IWL_POWER_SYS_BATTERY:
		final_mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_SYS_AC:
		final_mode = IWL_POWER_MODE_CAM;
		break;
	default:
		final_mode = IWL_POWER_INDEX_3;
		WARN_ON(1);
	}

	if (setting->critical_power_setting > final_mode)
		final_mode = setting->critical_power_setting;

	/* driver only support CAM for non STA network */
	if (priv->iw_mode != NL80211_IFTYPE_STATION)
		final_mode = IWL_POWER_MODE_CAM;

	if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
	    ((setting->power_mode != final_mode) || force)) {
		struct iwl_powertable_cmd cmd;

		if (final_mode != IWL_POWER_MODE_CAM)
			set_bit(STATUS_POWER_PMI, &priv->status);

		iwl_update_power_cmd(priv, &cmd, final_mode);
		cmd.keep_alive_beacons = 0;

		if (final_mode == IWL_POWER_INDEX_5)
			cmd.flags |= IWL_POWER_FAST_PD;

		ret = iwl_set_power(priv, &cmd);

		if (final_mode == IWL_POWER_MODE_CAM)
			clear_bit(STATUS_POWER_PMI, &priv->status);
		else
			set_bit(STATUS_POWER_PMI, &priv->status);

		if (priv->cfg->ops->lib->update_chain_flags && update_chains)
			priv->cfg->ops->lib->update_chain_flags(priv);
		else
			IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
					"calibration running: %d\n",
					priv->chain_noise_data.state);
		if (!ret)
			setting->power_mode = final_mode;
	}

	return ret;
}
EXPORT_SYMBOL(iwl_power_update_mode);

/* Allow other iwl code to disable/enable power management active
 * this will be useful for rate scale to disable PM during heavy
 * Tx/Rx activities
 */
int iwl_power_disable_management(struct iwl_priv *priv, u32 ms)
{
	u16 prev_mode;
	int ret = 0;

	if (priv->power_data.power_disabled)
		return -EBUSY;

	prev_mode = priv->power_data.user_power_setting;
	priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
	ret = iwl_power_update_mode(priv, 0);
	priv->power_data.power_disabled = 1;
	priv->power_data.user_power_setting = prev_mode;
	cancel_delayed_work(&priv->set_power_save);
	if (ms)
		queue_delayed_work(priv->workqueue, &priv->set_power_save,
				   msecs_to_jiffies(ms));


	return ret;
}
EXPORT_SYMBOL(iwl_power_disable_management);

/* Allow other iwl code to disable/enable power management active
 * this will be useful for rate scale to disable PM during high
 * volume activities
 */
int iwl_power_enable_management(struct iwl_priv *priv)
{
	int ret = 0;

	priv->power_data.power_disabled = 0;
	ret = iwl_power_update_mode(priv, 0);
	return ret;
}
EXPORT_SYMBOL(iwl_power_enable_management);

/* set user_power_setting */
int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
{
	if (mode > IWL_POWER_MAX)
		return -EINVAL;

	priv->power_data.user_power_setting = mode;

	return iwl_power_update_mode(priv, 0);
}
EXPORT_SYMBOL(iwl_power_set_user_mode);

/* set system_power_setting. This should be set by over all
 * PM application.
 */
int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
{
	if (mode < IWL_POWER_SYS_MAX)
		priv->power_data.system_power_setting = mode;
	else
		return -EINVAL;
	return iwl_power_update_mode(priv, 0);
}
EXPORT_SYMBOL(iwl_power_set_system_mode);

/* initialize to default */
void iwl_power_initialize(struct iwl_priv *priv)
{
	iwl_power_init_handle(priv);
	priv->power_data.user_power_setting = IWL_POWER_AUTO;
	priv->power_data.system_power_setting = IWL_POWER_SYS_AUTO;
	priv->power_data.power_disabled = 0;
	priv->power_data.is_battery_active = 0;
	priv->power_data.critical_power_setting = 0;
}
EXPORT_SYMBOL(iwl_power_initialize);

/* set critical_power_setting according to temperature value */
int iwl_power_temperature_change(struct iwl_priv *priv)
{
	int ret = 0;
	s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
	u16 new_critical = priv->power_data.critical_power_setting;

	if (temperature > IWL_CT_KILL_TEMPERATURE)
		return 0;
	else if (temperature > IWL_MIN_POWER_TEMPERATURE)
		new_critical = IWL_POWER_INDEX_5;
	else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
		new_critical = IWL_POWER_INDEX_3;
	else
		new_critical = IWL_POWER_MODE_CAM;

	if (new_critical != priv->power_data.critical_power_setting)
		priv->power_data.critical_power_setting = new_critical;

	if (priv->power_data.critical_power_setting >
				priv->power_data.power_mode)
		ret = iwl_power_update_mode(priv, 0);

	return ret;
}
EXPORT_SYMBOL(iwl_power_temperature_change);

static void iwl_bg_set_power_save(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work,
				struct iwl_priv, set_power_save.work);
	IWL_DEBUG_POWER(priv, "update power\n");

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	mutex_lock(&priv->mutex);

	/* on starting association we disable power management
	 * until association, if association failed then this
	 * timer will expire and enable PM again.
	 */
	if (!iwl_is_associated(priv))
		iwl_power_enable_management(priv);

	mutex_unlock(&priv->mutex);
}
void iwl_setup_power_deferred_work(struct iwl_priv *priv)
{
	INIT_DELAYED_WORK(&priv->set_power_save, iwl_bg_set_power_save);
}
EXPORT_SYMBOL(iwl_setup_power_deferred_work);

void iwl_power_cancel_timeout(struct iwl_priv *priv)
{
	cancel_delayed_work(&priv->set_power_save);
}
EXPORT_SYMBOL(iwl_power_cancel_timeout);
Commit	Line	Data
5da4b55f MA	1	/******************************************************************************
5da4b55f MA	2	*
01f8162a	3	* Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
5da4b55f MA	4	*
	5	* Portions of this file are derived from the ipw3945 project, as well
	6	* as portions of the ieee80211 subsystem header files.
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of version 2 of the GNU General Public License as
	10	* published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but WITHOUT
	13	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	14	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	15	* more details.
	16	*
	17	* You should have received a copy of the GNU General Public License along with
	18	* this program; if not, write to the Free Software Foundation, Inc.,
	19	* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
	20	*
	21	* The full GNU General Public License is included in this distribution in the
	22	* file called LICENSE.
	23	*
	24	* Contact Information:
759ef89f	25	* Intel Linux Wireless <ilw@linux.intel.com>
5da4b55f MA	26	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	27	*****************************************************************************/
	28
	29
	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
5da4b55f MA	32	#include <linux/init.h>
	33
	34	#include <net/mac80211.h>
	35
	36	#include "iwl-eeprom.h"
3e0d4cb1	37	#include "iwl-dev.h"
5da4b55f	38	#include "iwl-core.h"
5a36ba0e	39	#include "iwl-commands.h"
5da4b55f MA	40	#include "iwl-debug.h"
5da4b55f MA	41	#include "iwl-power.h"
5da4b55f MA	42
	43	/*
	44	* Setting power level allow the card to go to sleep when not busy
	45	* there are three factor that decide the power level to go to, they
	46	* are list here with its priority
	47	* 1- critical_power_setting this will be set according to card temperature.
	48	* 2- system_power_setting this will be set by system PM manager.
	49	* 3- user_power_setting this will be set by user either by writing to sys or
	50	* mac80211
	51	*
	52	* if system_power_setting and user_power_setting is set to auto
	53	* the power level will be decided according to association status and battery
	54	* status.
	55	*
	56	*/
	57
	58	#define MSEC_TO_USEC 1024
	59	#define IWL_POWER_RANGE_0_MAX (2)
	60	#define IWL_POWER_RANGE_1_MAX (10)
	61
	62
5da4b55f MA	63
	64	#define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
	65	#define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
	66	#define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
	67
	68
	69	#define IWL_CT_KILL_TEMPERATURE 110
	70	#define IWL_MIN_POWER_TEMPERATURE 100
	71	#define IWL_REDUCED_POWER_TEMPERATURE 95
	72
	73	/* default power management (not Tx power) table values */
a96a27f9	74	/* for TIM 0-10 */
298df1f6	75	static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
5da4b55f MA	76	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	77	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	78	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	79	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
	80	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
	81	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
	82	};
	83
	84
a96a27f9	85	/* for TIM = 3-10 */
298df1f6	86	static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
5da4b55f MA	87	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	88	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
	89	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
	90	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
	91	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
	92	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
	93	};
	94
a96a27f9	95	/* for TIM > 11 */
298df1f6	96	static struct iwl_power_vec_entry range_2[IWL_POWER_MAX] = {
5da4b55f MA	97	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	98	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
	99	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
	100	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	101	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	102	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
	103	};
	104
d25aabb0	105
ca579617 MA	106	/* set card power command */
	107	static int iwl_set_power(struct iwl_priv priv, void cmd)
	108	{
	109	return iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
	110	sizeof(struct iwl_powertable_cmd),
	111	cmd, NULL);
	112	}
5da4b55f MA	113	/* decide the right power level according to association status
	114	* and battery status
	115	*/
	116	static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
	117	{
298df1f6	118	u16 mode;
5da4b55f MA	119
	120	switch (priv->power_data.user_power_setting) {
	121	case IWL_POWER_AUTO:
	122	/* if running on battery */
	123	if (priv->power_data.is_battery_active)
	124	mode = IWL_POWER_ON_BATTERY;
	125	else if (iwl_is_associated(priv))
	126	mode = IWL_POWER_ON_AC_ASSOC;
	127	else
	128	mode = IWL_POWER_ON_AC_DISASSOC;
	129	break;
298df1f6 EK	130	default:
	131	mode = priv->power_data.user_power_setting;
	132	break;
5da4b55f MA	133	}
	134	return mode;
	135	}
	136
	137	/* initialize to default */
5cd19c5f	138	static void iwl_power_init_handle(struct iwl_priv *priv)
5da4b55f	139	{
5da4b55f	140	struct iwl_power_mgr *pow_data;
298df1f6	141	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
e7b63581 TW	142	struct iwl_powertable_cmd *cmd;
e7b63581 TW	143	int i;
5da4b55f MA	144	u16 pci_pm;
5da4b55f MA	145
e1623446	146	IWL_DEBUG_POWER(priv, "Initialize power \n");
5da4b55f	147
5cd19c5f	148	pow_data = &priv->power_data;
5da4b55f MA	149
	150	memset(pow_data, 0, sizeof(*pow_data));
	151
	152	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
	153	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
	154	memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
	155
e7b63581	156	pci_read_config_word(priv->pci_dev, PCI_CFG_LINK_CTRL, &pci_pm);
5da4b55f	157
e1623446	158	IWL_DEBUG_POWER(priv, "adjust power command flags\n");
5da4b55f	159
e7b63581 TW	160	for (i = 0; i < IWL_POWER_MAX; i++) {
e7b63581 TW	161	cmd = &pow_data->pwr_range_0[i].cmd;
5da4b55f	162
e7b63581 TW	163	if (pci_pm & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
	164	cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
	165	else
	166	cmd->flags \|= IWL_POWER_PCI_PM_MSK;
5da4b55f	167	}
5da4b55f MA	168	}
5da4b55f MA	169
a96a27f9	170	/* adjust power command according to DTIM period and power level*/
5cd19c5f WT	171	static int iwl_update_power_cmd(struct iwl_priv *priv,
5cd19c5f WT	172	struct iwl_powertable_cmd *cmd, u16 mode)
5da4b55f	173	{
5da4b55f	174	struct iwl_power_vec_entry *range;
5da4b55f	175	struct iwl_power_mgr *pow_data;
5cd19c5f WT	176	int i;
	177	u32 max_sleep = 0;
	178	u8 period;
	179	bool skip;
5da4b55f MA	180
5da4b55f MA	181	if (mode > IWL_POWER_INDEX_5) {
e1623446	182	IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
5cd19c5f	183	return -EINVAL;
5da4b55f	184	}
5cd19c5f WT	185
5cd19c5f WT	186	pow_data = &priv->power_data;
5da4b55f MA	187
	188	if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
	189	range = &pow_data->pwr_range_0[0];
	190	else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
	191	range = &pow_data->pwr_range_1[0];
	192	else
	193	range = &pow_data->pwr_range_2[0];
	194
	195	period = pow_data->dtim_period;
ca579617	196	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
5da4b55f MA	197
	198	if (period == 0) {
	199	period = 1;
5cd19c5f	200	skip = false;
5da4b55f	201	} else {
5cd19c5f WT	202	skip = !!range[mode].no_dtim;
	203	}
	204
	205	if (skip) {
5da4b55f MA	206	__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
	207	max_sleep = le32_to_cpu(slp_itrvl);
	208	if (max_sleep == 0xFF)
	209	max_sleep = period * (skip + 1);
	210	else if (max_sleep > period)
	211	max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
	212	cmd->flags \|= IWL_POWER_SLEEP_OVER_DTIM_MSK;
5cd19c5f WT	213	} else {
	214	max_sleep = period;
	215	cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
5da4b55f MA	216	}
5da4b55f MA	217
5cd19c5f	218	for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
5da4b55f MA	219	if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
5da4b55f MA	220	cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
5da4b55f	221
e1623446 TW	222	IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
	223	IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	224	IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	225	IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
5da4b55f MA	226	le32_to_cpu(cmd->sleep_interval[0]),
	227	le32_to_cpu(cmd->sleep_interval[1]),
	228	le32_to_cpu(cmd->sleep_interval[2]),
	229	le32_to_cpu(cmd->sleep_interval[3]),
	230	le32_to_cpu(cmd->sleep_interval[4]));
	231
5cd19c5f	232	return 0;
5da4b55f MA	233	}
	234
	235
	236	/*
a33c2f47	237	* compute the final power mode index
5da4b55f	238	*/
04816448	239	int iwl_power_update_mode(struct iwl_priv *priv, bool force)
5da4b55f MA	240	{
	241	struct iwl_power_mgr *setting = &(priv->power_data);
	242	int ret = 0;
	243	u16 uninitialized_var(final_mode);
a71c8f62	244	bool update_chains;
5da4b55f	245
04816448	246	/* Don't update the RX chain when chain noise calibration is running */
a71c8f62 WT	247	update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE \|\|
a71c8f62 WT	248	priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
04816448	249
a33c2f47 EG	250	/* If on battery, set to 3,
	251	* if plugged into AC power, set to CAM ("continuously aware mode"),
	252	* else user level */
5da4b55f MA	253
5da4b55f MA	254	switch (setting->system_power_setting) {
298df1f6	255	case IWL_POWER_SYS_AUTO:
5da4b55f MA	256	final_mode = iwl_get_auto_power_mode(priv);
5da4b55f MA	257	break;
298df1f6	258	case IWL_POWER_SYS_BATTERY:
5da4b55f MA	259	final_mode = IWL_POWER_INDEX_3;
5da4b55f MA	260	break;
298df1f6	261	case IWL_POWER_SYS_AC:
5da4b55f MA	262	final_mode = IWL_POWER_MODE_CAM;
	263	break;
	264	default:
298df1f6 EK	265	final_mode = IWL_POWER_INDEX_3;
298df1f6 EK	266	WARN_ON(1);
5da4b55f MA	267	}
	268
	269	if (setting->critical_power_setting > final_mode)
	270	final_mode = setting->critical_power_setting;
	271
	272	/* driver only support CAM for non STA network */
05c914fe	273	if (priv->iw_mode != NL80211_IFTYPE_STATION)
5da4b55f MA	274	final_mode = IWL_POWER_MODE_CAM;
	275
	276	if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
04816448	277	((setting->power_mode != final_mode) \|\| force)) {
ca579617	278	struct iwl_powertable_cmd cmd;
5da4b55f MA	279
	280	if (final_mode != IWL_POWER_MODE_CAM)
	281	set_bit(STATUS_POWER_PMI, &priv->status);
	282
5cd19c5f	283	iwl_update_power_cmd(priv, &cmd, final_mode);
5da4b55f MA	284	cmd.keep_alive_beacons = 0;
	285
	286	if (final_mode == IWL_POWER_INDEX_5)
	287	cmd.flags \|= IWL_POWER_FAST_PD;
	288
ca579617	289	ret = iwl_set_power(priv, &cmd);
5da4b55f MA	290
	291	if (final_mode == IWL_POWER_MODE_CAM)
	292	clear_bit(STATUS_POWER_PMI, &priv->status);
	293	else
	294	set_bit(STATUS_POWER_PMI, &priv->status);
	295
a71c8f62	296	if (priv->cfg->ops->lib->update_chain_flags && update_chains)
5da4b55f	297	priv->cfg->ops->lib->update_chain_flags(priv);
a71c8f62	298	else
e1623446	299	IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
a71c8f62 WT	300	"calibration running: %d\n",
a71c8f62 WT	301	priv->chain_noise_data.state);
5da4b55f MA	302	if (!ret)
	303	setting->power_mode = final_mode;
	304	}
	305
	306	return ret;
	307	}
	308	EXPORT_SYMBOL(iwl_power_update_mode);
	309
	310	/* Allow other iwl code to disable/enable power management active
a96a27f9	311	* this will be useful for rate scale to disable PM during heavy
5da4b55f MA	312	* Tx/Rx activities
5da4b55f MA	313	*/
c90a74ba	314	int iwl_power_disable_management(struct iwl_priv *priv, u32 ms)
5da4b55f MA	315	{
	316	u16 prev_mode;
	317	int ret = 0;
	318
	319	if (priv->power_data.power_disabled)
	320	return -EBUSY;
	321
	322	prev_mode = priv->power_data.user_power_setting;
	323	priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
	324	ret = iwl_power_update_mode(priv, 0);
	325	priv->power_data.power_disabled = 1;
	326	priv->power_data.user_power_setting = prev_mode;
c90a74ba EG	327	cancel_delayed_work(&priv->set_power_save);
	328	if (ms)
	329	queue_delayed_work(priv->workqueue, &priv->set_power_save,
	330	msecs_to_jiffies(ms));
	331
5da4b55f MA	332
	333	return ret;
	334	}
	335	EXPORT_SYMBOL(iwl_power_disable_management);
	336
	337	/* Allow other iwl code to disable/enable power management active
a96a27f9 TW	338	* this will be useful for rate scale to disable PM during high
a96a27f9 TW	339	* volume activities
5da4b55f MA	340	*/
	341	int iwl_power_enable_management(struct iwl_priv *priv)
	342	{
	343	int ret = 0;
	344
	345	priv->power_data.power_disabled = 0;
	346	ret = iwl_power_update_mode(priv, 0);
	347	return ret;
	348	}
	349	EXPORT_SYMBOL(iwl_power_enable_management);
	350
	351	/* set user_power_setting */
	352	int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
	353	{
d25aabb0	354	if (mode > IWL_POWER_MAX)
5da4b55f MA	355	return -EINVAL;
	356
	357	priv->power_data.user_power_setting = mode;
	358
04816448	359	return iwl_power_update_mode(priv, 0);
5da4b55f MA	360	}
	361	EXPORT_SYMBOL(iwl_power_set_user_mode);
	362
5da4b55f MA	363	/* set system_power_setting. This should be set by over all
	364	* PM application.
	365	*/
	366	int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
	367	{
d25aabb0 WT	368	if (mode < IWL_POWER_SYS_MAX)
	369	priv->power_data.system_power_setting = mode;
	370	else
5da4b55f	371	return -EINVAL;
04816448	372	return iwl_power_update_mode(priv, 0);
5da4b55f MA	373	}
	374	EXPORT_SYMBOL(iwl_power_set_system_mode);
	375
a96a27f9	376	/* initialize to default */
5da4b55f MA	377	void iwl_power_initialize(struct iwl_priv *priv)
5da4b55f MA	378	{
5da4b55f MA	379	iwl_power_init_handle(priv);
5da4b55f MA	380	priv->power_data.user_power_setting = IWL_POWER_AUTO;
298df1f6	381	priv->power_data.system_power_setting = IWL_POWER_SYS_AUTO;
5da4b55f	382	priv->power_data.power_disabled = 0;
5cd19c5f	383	priv->power_data.is_battery_active = 0;
5da4b55f MA	384	priv->power_data.critical_power_setting = 0;
	385	}
	386	EXPORT_SYMBOL(iwl_power_initialize);
	387
	388	/* set critical_power_setting according to temperature value */
	389	int iwl_power_temperature_change(struct iwl_priv *priv)
	390	{
	391	int ret = 0;
5da4b55f	392	s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
5cd19c5f	393	u16 new_critical = priv->power_data.critical_power_setting;
5da4b55f MA	394
	395	if (temperature > IWL_CT_KILL_TEMPERATURE)
	396	return 0;
	397	else if (temperature > IWL_MIN_POWER_TEMPERATURE)
	398	new_critical = IWL_POWER_INDEX_5;
	399	else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
	400	new_critical = IWL_POWER_INDEX_3;
	401	else
	402	new_critical = IWL_POWER_MODE_CAM;
	403
	404	if (new_critical != priv->power_data.critical_power_setting)
	405	priv->power_data.critical_power_setting = new_critical;
	406
	407	if (priv->power_data.critical_power_setting >
	408	priv->power_data.power_mode)
	409	ret = iwl_power_update_mode(priv, 0);
	410
	411	return ret;
	412	}
	413	EXPORT_SYMBOL(iwl_power_temperature_change);
c90a74ba EG	414
	415	static void iwl_bg_set_power_save(struct work_struct *work)
	416	{
	417	struct iwl_priv *priv = container_of(work,
	418	struct iwl_priv, set_power_save.work);
e1623446	419	IWL_DEBUG_POWER(priv, "update power\n");
c90a74ba EG	420
	421	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
	422	return;
	423
	424	mutex_lock(&priv->mutex);
	425
a96a27f9	426	/* on starting association we disable power management
c90a74ba EG	427	* until association, if association failed then this
	428	* timer will expire and enable PM again.
	429	*/
	430	if (!iwl_is_associated(priv))
	431	iwl_power_enable_management(priv);
	432
	433	mutex_unlock(&priv->mutex);
	434	}
	435	void iwl_setup_power_deferred_work(struct iwl_priv *priv)
	436	{
	437	INIT_DELAYED_WORK(&priv->set_power_save, iwl_bg_set_power_save);
	438	}
	439	EXPORT_SYMBOL(iwl_setup_power_deferred_work);
	440
	441	void iwl_power_cancel_timeout(struct iwl_priv *priv)
	442	{
	443	cancel_delayed_work(&priv->set_power_save);
	444	}
	445	EXPORT_SYMBOL(iwl_power_cancel_timeout);