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

/******************************************************************************
 *
 * Copyright(c) 2007 - 2008 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"
#include "iwl-helpers.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 NOSLP __constant_cpu_to_le16(0), 0, 0
#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
#define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
				     __constant_cpu_to_le32(X1), \
				     __constant_cpu_to_le32(X2), \
				     __constant_cpu_to_le32(X3), \
				     __constant_cpu_to_le32(X4)}

#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;
	/* FIXME: remove battery and ac from here */
	case IWL_POWER_BATTERY:
		mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_AC:
		mode = IWL_POWER_MODE_CAM;
		break;
	default:
		mode = priv->power_data.user_power_setting;
		break;
	}
	return mode;
}

/* initialize to default */
static int 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("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("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;
	}
	return 0;
}

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

	if (mode > IWL_POWER_INDEX_5) {
		IWL_DEBUG_POWER("Error invalid power mode \n");
		return -1;
	}
	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 = 0;
	} else
		skip = range[mode].no_dtim;

	if (skip == 0) {
		max_sleep = period;
		cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
	} else {
		__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;
	}

	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("Flags value = 0x%08X\n", cmd->flags);
	IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	IWL_DEBUG_POWER("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 ret;
}


/*
 * 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_command(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("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_LIMIT)
		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_LIMIT)
		return -EINVAL;

	priv->power_data.system_power_setting = mode;

	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.power_disabled = 0;
	priv->power_data.system_power_setting = IWL_POWER_SYS_AUTO;
	priv->power_data.is_battery_active = 0;
	priv->power_data.power_disabled = 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;
	u16 new_critical = priv->power_data.critical_power_setting;
	s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);

	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(IWL_DL_STATE, "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	/******************************************************************************
	2	*
	3	* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
	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"
	41	#include "iwl-power.h"
	42	#include "iwl-helpers.h"
	43
	44	/*
	45	* Setting power level allow the card to go to sleep when not busy
	46	* there are three factor that decide the power level to go to, they
	47	* are list here with its priority
	48	* 1- critical_power_setting this will be set according to card temperature.
	49	* 2- system_power_setting this will be set by system PM manager.
	50	* 3- user_power_setting this will be set by user either by writing to sys or
	51	* mac80211
	52	*
	53	* if system_power_setting and user_power_setting is set to auto
	54	* the power level will be decided according to association status and battery
	55	* status.
	56	*
	57	*/
	58
	59	#define MSEC_TO_USEC 1024
	60	#define IWL_POWER_RANGE_0_MAX (2)
	61	#define IWL_POWER_RANGE_1_MAX (10)
	62
	63
	64	#define NOSLP __constant_cpu_to_le16(0), 0, 0
	65	#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
	66	#define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
	67	#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
	68	__constant_cpu_to_le32(X1), \
	69	__constant_cpu_to_le32(X2), \
	70	__constant_cpu_to_le32(X3), \
	71	__constant_cpu_to_le32(X4)}
	72
	73	#define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
	74	#define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
	75	#define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
	76
	77
	78	#define IWL_CT_KILL_TEMPERATURE 110
	79	#define IWL_MIN_POWER_TEMPERATURE 100
	80	#define IWL_REDUCED_POWER_TEMPERATURE 95
	81
	82	/* default power management (not Tx power) table values */
a96a27f9	83	/* for TIM 0-10 */
298df1f6	84	static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
5da4b55f MA	85	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	86	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	87	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
	88	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
	89	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
	90	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
	91	};
	92
	93
a96a27f9	94	/* for TIM = 3-10 */
298df1f6	95	static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
5da4b55f MA	96	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	97	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
	98	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
	99	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
	100	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
	101	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
	102	};
	103
a96a27f9	104	/* for TIM > 11 */
298df1f6	105	static struct iwl_power_vec_entry range_2[IWL_POWER_MAX] = {
5da4b55f MA	106	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
	107	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
	108	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
	109	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	110	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
	111	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
	112	};
	113
ca579617 MA	114	/* set card power command */
	115	static int iwl_set_power(struct iwl_priv priv, void cmd)
	116	{
	117	return iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
	118	sizeof(struct iwl_powertable_cmd),
	119	cmd, NULL);
	120	}
5da4b55f MA	121	/* decide the right power level according to association status
	122	* and battery status
	123	*/
	124	static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
	125	{
298df1f6	126	u16 mode;
5da4b55f MA	127
	128	switch (priv->power_data.user_power_setting) {
	129	case IWL_POWER_AUTO:
	130	/* if running on battery */
	131	if (priv->power_data.is_battery_active)
	132	mode = IWL_POWER_ON_BATTERY;
	133	else if (iwl_is_associated(priv))
	134	mode = IWL_POWER_ON_AC_ASSOC;
	135	else
	136	mode = IWL_POWER_ON_AC_DISASSOC;
	137	break;
298df1f6	138	/* FIXME: remove battery and ac from here */
5da4b55f MA	139	case IWL_POWER_BATTERY:
	140	mode = IWL_POWER_INDEX_3;
	141	break;
	142	case IWL_POWER_AC:
	143	mode = IWL_POWER_MODE_CAM;
	144	break;
298df1f6 EK	145	default:
	146	mode = priv->power_data.user_power_setting;
	147	break;
5da4b55f MA	148	}
	149	return mode;
	150	}
	151
	152	/* initialize to default */
	153	static int iwl_power_init_handle(struct iwl_priv *priv)
	154	{
5da4b55f	155	struct iwl_power_mgr *pow_data;
298df1f6	156	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
e7b63581 TW	157	struct iwl_powertable_cmd *cmd;
e7b63581 TW	158	int i;
5da4b55f MA	159	u16 pci_pm;
	160
	161	IWL_DEBUG_POWER("Initialize power \n");
	162
	163	pow_data = &(priv->power_data);
	164
	165	memset(pow_data, 0, sizeof(*pow_data));
	166
	167	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
	168	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
	169	memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
	170
e7b63581	171	pci_read_config_word(priv->pci_dev, PCI_CFG_LINK_CTRL, &pci_pm);
5da4b55f	172
e7b63581	173	IWL_DEBUG_POWER("adjust power command flags\n");
5da4b55f	174
e7b63581 TW	175	for (i = 0; i < IWL_POWER_MAX; i++) {
e7b63581 TW	176	cmd = &pow_data->pwr_range_0[i].cmd;
5da4b55f	177
e7b63581 TW	178	if (pci_pm & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
	179	cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
	180	else
	181	cmd->flags \|= IWL_POWER_PCI_PM_MSK;
5da4b55f	182	}
e7b63581	183	return 0;
5da4b55f MA	184	}
5da4b55f MA	185
a96a27f9	186	/* adjust power command according to DTIM period and power level*/
5da4b55f	187	static int iwl_update_power_command(struct iwl_priv *priv,
ca579617	188	struct iwl_powertable_cmd *cmd,
5da4b55f MA	189	u16 mode)
	190	{
	191	int ret = 0, i;
	192	u8 skip;
	193	u32 max_sleep = 0;
	194	struct iwl_power_vec_entry *range;
	195	u8 period = 0;
	196	struct iwl_power_mgr *pow_data;
	197
	198	if (mode > IWL_POWER_INDEX_5) {
	199	IWL_DEBUG_POWER("Error invalid power mode \n");
	200	return -1;
	201	}
	202	pow_data = &(priv->power_data);
	203
	204	if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
	205	range = &pow_data->pwr_range_0[0];
	206	else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
	207	range = &pow_data->pwr_range_1[0];
	208	else
	209	range = &pow_data->pwr_range_2[0];
	210
	211	period = pow_data->dtim_period;
ca579617	212	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
5da4b55f MA	213
	214	if (period == 0) {
	215	period = 1;
	216	skip = 0;
	217	} else
	218	skip = range[mode].no_dtim;
	219
	220	if (skip == 0) {
	221	max_sleep = period;
	222	cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
	223	} else {
	224	__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
	225	max_sleep = le32_to_cpu(slp_itrvl);
	226	if (max_sleep == 0xFF)
	227	max_sleep = period * (skip + 1);
	228	else if (max_sleep > period)
	229	max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
	230	cmd->flags \|= IWL_POWER_SLEEP_OVER_DTIM_MSK;
	231	}
	232
	233	for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
	234	if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
	235	cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
	236	}
	237
	238	IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
	239	IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
	240	IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
	241	IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
	242	le32_to_cpu(cmd->sleep_interval[0]),
	243	le32_to_cpu(cmd->sleep_interval[1]),
	244	le32_to_cpu(cmd->sleep_interval[2]),
	245	le32_to_cpu(cmd->sleep_interval[3]),
	246	le32_to_cpu(cmd->sleep_interval[4]));
	247
	248	return ret;
	249	}
	250
	251
	252	/*
a33c2f47	253	* compute the final power mode index
5da4b55f	254	*/
04816448	255	int iwl_power_update_mode(struct iwl_priv *priv, bool force)
5da4b55f MA	256	{
	257	struct iwl_power_mgr *setting = &(priv->power_data);
	258	int ret = 0;
	259	u16 uninitialized_var(final_mode);
a71c8f62	260	bool update_chains;
5da4b55f	261
04816448	262	/* Don't update the RX chain when chain noise calibration is running */
a71c8f62 WT	263	update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE \|\|
a71c8f62 WT	264	priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
04816448	265
a33c2f47 EG	266	/* If on battery, set to 3,
	267	* if plugged into AC power, set to CAM ("continuously aware mode"),
	268	* else user level */
5da4b55f MA	269
5da4b55f MA	270	switch (setting->system_power_setting) {
298df1f6	271	case IWL_POWER_SYS_AUTO:
5da4b55f MA	272	final_mode = iwl_get_auto_power_mode(priv);
5da4b55f MA	273	break;
298df1f6	274	case IWL_POWER_SYS_BATTERY:
5da4b55f MA	275	final_mode = IWL_POWER_INDEX_3;
5da4b55f MA	276	break;
298df1f6	277	case IWL_POWER_SYS_AC:
5da4b55f MA	278	final_mode = IWL_POWER_MODE_CAM;
	279	break;
	280	default:
298df1f6 EK	281	final_mode = IWL_POWER_INDEX_3;
298df1f6 EK	282	WARN_ON(1);
5da4b55f MA	283	}
	284
	285	if (setting->critical_power_setting > final_mode)
	286	final_mode = setting->critical_power_setting;
	287
	288	/* driver only support CAM for non STA network */
05c914fe	289	if (priv->iw_mode != NL80211_IFTYPE_STATION)
5da4b55f MA	290	final_mode = IWL_POWER_MODE_CAM;
	291
	292	if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
04816448	293	((setting->power_mode != final_mode) \|\| force)) {
ca579617	294	struct iwl_powertable_cmd cmd;
5da4b55f MA	295
	296	if (final_mode != IWL_POWER_MODE_CAM)
	297	set_bit(STATUS_POWER_PMI, &priv->status);
	298
	299	iwl_update_power_command(priv, &cmd, final_mode);
	300	cmd.keep_alive_beacons = 0;
	301
	302	if (final_mode == IWL_POWER_INDEX_5)
	303	cmd.flags \|= IWL_POWER_FAST_PD;
	304
ca579617	305	ret = iwl_set_power(priv, &cmd);
5da4b55f MA	306
	307	if (final_mode == IWL_POWER_MODE_CAM)
	308	clear_bit(STATUS_POWER_PMI, &priv->status);
	309	else
	310	set_bit(STATUS_POWER_PMI, &priv->status);
	311
a71c8f62	312	if (priv->cfg->ops->lib->update_chain_flags && update_chains)
5da4b55f	313	priv->cfg->ops->lib->update_chain_flags(priv);
a71c8f62 WT	314	else
	315	IWL_DEBUG_POWER("Cannot update the power, chain noise "
	316	"calibration running: %d\n",
	317	priv->chain_noise_data.state);
5da4b55f MA	318	if (!ret)
	319	setting->power_mode = final_mode;
	320	}
	321
	322	return ret;
	323	}
	324	EXPORT_SYMBOL(iwl_power_update_mode);
	325
	326	/* Allow other iwl code to disable/enable power management active
a96a27f9	327	* this will be useful for rate scale to disable PM during heavy
5da4b55f MA	328	* Tx/Rx activities
5da4b55f MA	329	*/
c90a74ba	330	int iwl_power_disable_management(struct iwl_priv *priv, u32 ms)
5da4b55f MA	331	{
	332	u16 prev_mode;
	333	int ret = 0;
	334
	335	if (priv->power_data.power_disabled)
	336	return -EBUSY;
	337
	338	prev_mode = priv->power_data.user_power_setting;
	339	priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
	340	ret = iwl_power_update_mode(priv, 0);
	341	priv->power_data.power_disabled = 1;
	342	priv->power_data.user_power_setting = prev_mode;
c90a74ba EG	343	cancel_delayed_work(&priv->set_power_save);
	344	if (ms)
	345	queue_delayed_work(priv->workqueue, &priv->set_power_save,
	346	msecs_to_jiffies(ms));
	347
5da4b55f MA	348
	349	return ret;
	350	}
	351	EXPORT_SYMBOL(iwl_power_disable_management);
	352
	353	/* Allow other iwl code to disable/enable power management active
a96a27f9 TW	354	* this will be useful for rate scale to disable PM during high
a96a27f9 TW	355	* volume activities
5da4b55f MA	356	*/
	357	int iwl_power_enable_management(struct iwl_priv *priv)
	358	{
	359	int ret = 0;
	360
	361	priv->power_data.power_disabled = 0;
	362	ret = iwl_power_update_mode(priv, 0);
	363	return ret;
	364	}
	365	EXPORT_SYMBOL(iwl_power_enable_management);
	366
	367	/* set user_power_setting */
	368	int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
	369	{
5da4b55f MA	370	if (mode > IWL_POWER_LIMIT)
	371	return -EINVAL;
	372
	373	priv->power_data.user_power_setting = mode;
	374
04816448	375	return iwl_power_update_mode(priv, 0);
5da4b55f MA	376	}
	377	EXPORT_SYMBOL(iwl_power_set_user_mode);
	378
5da4b55f MA	379	/* set system_power_setting. This should be set by over all
	380	* PM application.
	381	*/
	382	int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
	383	{
5da4b55f MA	384	if (mode > IWL_POWER_LIMIT)
	385	return -EINVAL;
	386
	387	priv->power_data.system_power_setting = mode;
	388
04816448	389	return iwl_power_update_mode(priv, 0);
5da4b55f MA	390	}
	391	EXPORT_SYMBOL(iwl_power_set_system_mode);
	392
a96a27f9	393	/* initialize to default */
5da4b55f MA	394	void iwl_power_initialize(struct iwl_priv *priv)
	395	{
	396
	397	iwl_power_init_handle(priv);
	398	priv->power_data.user_power_setting = IWL_POWER_AUTO;
	399	priv->power_data.power_disabled = 0;
298df1f6	400	priv->power_data.system_power_setting = IWL_POWER_SYS_AUTO;
5da4b55f MA	401	priv->power_data.is_battery_active = 0;
	402	priv->power_data.power_disabled = 0;
	403	priv->power_data.critical_power_setting = 0;
	404	}
	405	EXPORT_SYMBOL(iwl_power_initialize);
	406
	407	/* set critical_power_setting according to temperature value */
	408	int iwl_power_temperature_change(struct iwl_priv *priv)
	409	{
	410	int ret = 0;
	411	u16 new_critical = priv->power_data.critical_power_setting;
	412	s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
	413
	414	if (temperature > IWL_CT_KILL_TEMPERATURE)
	415	return 0;
	416	else if (temperature > IWL_MIN_POWER_TEMPERATURE)
	417	new_critical = IWL_POWER_INDEX_5;
	418	else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
	419	new_critical = IWL_POWER_INDEX_3;
	420	else
	421	new_critical = IWL_POWER_MODE_CAM;
	422
	423	if (new_critical != priv->power_data.critical_power_setting)
	424	priv->power_data.critical_power_setting = new_critical;
	425
	426	if (priv->power_data.critical_power_setting >
	427	priv->power_data.power_mode)
	428	ret = iwl_power_update_mode(priv, 0);
	429
	430	return ret;
	431	}
	432	EXPORT_SYMBOL(iwl_power_temperature_change);
c90a74ba EG	433
	434	static void iwl_bg_set_power_save(struct work_struct *work)
	435	{
	436	struct iwl_priv *priv = container_of(work,
	437	struct iwl_priv, set_power_save.work);
	438	IWL_DEBUG(IWL_DL_STATE, "update power\n");
	439
	440	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
	441	return;
	442
	443	mutex_lock(&priv->mutex);
	444
a96a27f9	445	/* on starting association we disable power management
c90a74ba EG	446	* until association, if association failed then this
	447	* timer will expire and enable PM again.
	448	*/
	449	if (!iwl_is_associated(priv))
	450	iwl_power_enable_management(priv);
	451
	452	mutex_unlock(&priv->mutex);
	453	}
	454	void iwl_setup_power_deferred_work(struct iwl_priv *priv)
	455	{
	456	INIT_DELAYED_WORK(&priv->set_power_save, iwl_bg_set_power_save);
	457	}
	458	EXPORT_SYMBOL(iwl_setup_power_deferred_work);
	459
	460	void iwl_power_cancel_timeout(struct iwl_priv *priv)
	461	{
	462	cancel_delayed_work(&priv->set_power_save);
	463	}
	464	EXPORT_SYMBOL(iwl_power_cancel_timeout);