[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:
 * James P. Ketrenos <ipw2100-admin@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/version.h>
#include <linux/init.h>

#include <net/mac80211.h>

#include "iwl-eeprom.h"
#include "iwl-4965.h"
#include "iwl-core.h"
#include "iwl-4965-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_AC] = {
	{{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_AC] = {
	{{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_AC] = {
	{{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}
};

/* 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 = priv->power_data.user_power_setting;

	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;
	case IWL_POWER_BATTERY:
		mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_AC:
		mode = IWL_POWER_MODE_CAM;
		break;
	}
	return mode;
}

/* initialize to default */
static int iwl_power_init_handle(struct iwl_priv *priv)
{
	int ret = 0, i;
	struct iwl_power_mgr *pow_data;
	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
	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);

	ret = pci_read_config_word(priv->pci_dev,
				  PCI_LINK_CTRL, &pci_pm);
	if (ret != 0)
		return 0;
	else {
		struct iwl4965_powertable_cmd *cmd;

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

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

			if (pci_pm & 0x1)
				cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
			else
				cmd->flags |= IWL_POWER_PCI_PM_MSK;
		}
	}
	return ret;
}

/* adjust power command according to dtim period and power level*/
static int iwl_update_power_command(struct iwl_priv *priv,
				    struct iwl4965_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 iwl4965_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;
}


/*
 * calucaute the final power mode index
 */
int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh)
{
	struct iwl_power_mgr *setting = &(priv->power_data);
	int ret = 0;
	u16 uninitialized_var(final_mode);

       /* 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_AUTO:
		final_mode = iwl_get_auto_power_mode(priv);
		break;
	case IWL_POWER_BATTERY:
		final_mode = IWL_POWER_INDEX_3;
		break;
	case IWL_POWER_AC:
		final_mode = IWL_POWER_MODE_CAM;
		break;
	default:
		final_mode = setting->system_power_setting;
	}

	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 != IEEE80211_IF_TYPE_STA)
		final_mode = IWL_POWER_MODE_CAM;

	if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
	    ((setting->power_mode != final_mode) || refresh)) {
		struct iwl4965_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;

		if (priv->cfg->ops->lib->set_power)
			ret = priv->cfg->ops->lib->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)
			priv->cfg->ops->lib->update_chain_flags(priv);

		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 usefull for rate scale to disable PM during heavy
 * Tx/Rx activities
 */
int iwl_power_disable_management(struct iwl_priv *priv)
{
	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;

	return ret;
}
EXPORT_SYMBOL(iwl_power_disable_management);

/* Allow other iwl code to disable/enable power management active
 * this will be usefull for rate scale to disable PM during hight
 * valume 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)
{
	int ret = 0;

	if (mode > IWL_POWER_LIMIT)
		return -EINVAL;

	priv->power_data.user_power_setting = mode;

	ret = iwl_power_update_mode(priv, 0);

	return ret;
}
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)
{
	int ret = 0;

	if (mode > IWL_POWER_LIMIT)
		return -EINVAL;

	priv->power_data.system_power_setting = mode;

	ret = iwl_power_update_mode(priv, 0);

	return ret;
}
EXPORT_SYMBOL(iwl_power_set_system_mode);

/* initilize 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_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);
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:
	25	* James P. Ketrenos <ipw2100-admin@linux.intel.com>
	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>
	32	#include <linux/version.h>
	33	#include <linux/init.h>
	34
	35	#include <net/mac80211.h>
	36
	37	#include "iwl-eeprom.h"
	38	#include "iwl-4965.h"
	39	#include "iwl-core.h"
	40	#include "iwl-4965-commands.h"
	41	#include "iwl-debug.h"
	42	#include "iwl-power.h"
	43	#include "iwl-helpers.h"
	44
	45	/*
	46	* Setting power level allow the card to go to sleep when not busy
	47	* there are three factor that decide the power level to go to, they
	48	* are list here with its priority
	49	* 1- critical_power_setting this will be set according to card temperature.
	50	* 2- system_power_setting this will be set by system PM manager.
	51	* 3- user_power_setting this will be set by user either by writing to sys or
	52	* mac80211
	53	*
	54	* if system_power_setting and user_power_setting is set to auto
	55	* the power level will be decided according to association status and battery
	56	* status.
	57	*
	58	*/
	59
	60	#define MSEC_TO_USEC 1024
	61	#define IWL_POWER_RANGE_0_MAX (2)
	62	#define IWL_POWER_RANGE_1_MAX (10)
	63
	64
65	#define NOSLP __constant_cpu_to_le16(0), 0, 0
66	#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
67	#define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
68	#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
69	__constant_cpu_to_le32(X1), \
70	__constant_cpu_to_le32(X2), \
71	__constant_cpu_to_le32(X3), \
72	__constant_cpu_to_le32(X4)}
73
74	#define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
75	#define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
76	#define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
77
78
79	#define IWL_CT_KILL_TEMPERATURE 110
80	#define IWL_MIN_POWER_TEMPERATURE 100
81	#define IWL_REDUCED_POWER_TEMPERATURE 95
82
83	/* default power management (not Tx power) table values */
84	/* for tim 0-10 */
85	static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
86	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
87	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
88	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
89	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
90	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
91	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
92	};
93
94
95	/* for tim = 3-10 */
96	static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
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, 4)}, 0},
99	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
100	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
101	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
102	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
103	};
104
105	/* for tim > 11 */
106	static struct iwl_power_vec_entry range_2[IWL_POWER_AC] = {
107	{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
108	{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
109	{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
110	{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
111	{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
112	{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
113	};
114
115	/* decide the right power level according to association status
116	* and battery status
117	*/
118	static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
119	{
120	u16 mode = priv->power_data.user_power_setting;
121
122	switch (priv->power_data.user_power_setting) {
123	case IWL_POWER_AUTO:
124	/* if running on battery */
125	if (priv->power_data.is_battery_active)
126	mode = IWL_POWER_ON_BATTERY;
127	else if (iwl_is_associated(priv))
128	mode = IWL_POWER_ON_AC_ASSOC;
129	else
130	mode = IWL_POWER_ON_AC_DISASSOC;
131	break;
132	case IWL_POWER_BATTERY:
133	mode = IWL_POWER_INDEX_3;
134	break;
135	case IWL_POWER_AC:
136	mode = IWL_POWER_MODE_CAM;
137	break;
138	}
139	return mode;
140	}
141
142	/* initialize to default */
143	static int iwl_power_init_handle(struct iwl_priv *priv)
144	{
145	int ret = 0, i;
146	struct iwl_power_mgr *pow_data;
147	int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
148	u16 pci_pm;
149
150	IWL_DEBUG_POWER("Initialize power \n");
151
152	pow_data = &(priv->power_data);
153
154	memset(pow_data, 0, sizeof(*pow_data));
155
156	memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
157	memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
158	memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
159
160	ret = pci_read_config_word(priv->pci_dev,
161	PCI_LINK_CTRL, &pci_pm);
162	if (ret != 0)
163	return 0;
164	else {
165	struct iwl4965_powertable_cmd *cmd;
166
167	IWL_DEBUG_POWER("adjust power command flags\n");
168
169	for (i = 0; i < IWL_POWER_AC; i++) {
170	cmd = &pow_data->pwr_range_0[i].cmd;
171
172	if (pci_pm & 0x1)
173	cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
174	else
175	cmd->flags \|= IWL_POWER_PCI_PM_MSK;
176	}
177	}
178	return ret;
179	}
180
181	/* adjust power command according to dtim period and power level*/
182	static int iwl_update_power_command(struct iwl_priv *priv,
183	struct iwl4965_powertable_cmd *cmd,
184	u16 mode)
185	{
186	int ret = 0, i;
187	u8 skip;
188	u32 max_sleep = 0;
189	struct iwl_power_vec_entry *range;
190	u8 period = 0;
191	struct iwl_power_mgr *pow_data;
192
193	if (mode > IWL_POWER_INDEX_5) {
194	IWL_DEBUG_POWER("Error invalid power mode \n");
195	return -1;
196	}
197	pow_data = &(priv->power_data);
198
199	if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
200	range = &pow_data->pwr_range_0[0];
201	else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
202	range = &pow_data->pwr_range_1[0];
203	else
204	range = &pow_data->pwr_range_2[0];
205
206	period = pow_data->dtim_period;
207	memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
208
209	if (period == 0) {
210	period = 1;
211	skip = 0;
212	} else
213	skip = range[mode].no_dtim;
214
215	if (skip == 0) {
216	max_sleep = period;
217	cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
218	} else {
219	__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
220	max_sleep = le32_to_cpu(slp_itrvl);
221	if (max_sleep == 0xFF)
222	max_sleep = period * (skip + 1);
223	else if (max_sleep > period)
224	max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
225	cmd->flags \|= IWL_POWER_SLEEP_OVER_DTIM_MSK;
226	}
227
228	for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
229	if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
230	cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
231	}
232
233	IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
234	IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
235	IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
236	IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
237	le32_to_cpu(cmd->sleep_interval[0]),
238	le32_to_cpu(cmd->sleep_interval[1]),
239	le32_to_cpu(cmd->sleep_interval[2]),
240	le32_to_cpu(cmd->sleep_interval[3]),
241	le32_to_cpu(cmd->sleep_interval[4]));
242
243	return ret;
244	}
245
246
247	/*
248	* calucaute the final power mode index
249	*/
250	int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh)
251	{
252	struct iwl_power_mgr *setting = &(priv->power_data);
253	int ret = 0;
254	u16 uninitialized_var(final_mode);
255
256	/* If on battery, set to 3,
257	* if plugged into AC power, set to CAM ("continuously aware mode"),
258	* else user level */
259
260	switch (setting->system_power_setting) {
261	case IWL_POWER_AUTO:
262	final_mode = iwl_get_auto_power_mode(priv);
263	break;
264	case IWL_POWER_BATTERY:
265	final_mode = IWL_POWER_INDEX_3;
266	break;
267	case IWL_POWER_AC:
268	final_mode = IWL_POWER_MODE_CAM;
269	break;
270	default:
271	final_mode = setting->system_power_setting;
272	}
273
274	if (setting->critical_power_setting > final_mode)
275	final_mode = setting->critical_power_setting;
276
277	/* driver only support CAM for non STA network */
278	if (priv->iw_mode != IEEE80211_IF_TYPE_STA)
279	final_mode = IWL_POWER_MODE_CAM;
280
281	if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
282	((setting->power_mode != final_mode) \|\| refresh)) {
283	struct iwl4965_powertable_cmd cmd;
284
285	if (final_mode != IWL_POWER_MODE_CAM)
286	set_bit(STATUS_POWER_PMI, &priv->status);
287
288	iwl_update_power_command(priv, &cmd, final_mode);
289	cmd.keep_alive_beacons = 0;
290
291	if (final_mode == IWL_POWER_INDEX_5)
292	cmd.flags \|= IWL_POWER_FAST_PD;
293
294	if (priv->cfg->ops->lib->set_power)
295	ret = priv->cfg->ops->lib->set_power(priv, &cmd);
296
297	if (final_mode == IWL_POWER_MODE_CAM)
298	clear_bit(STATUS_POWER_PMI, &priv->status);
299	else
300	set_bit(STATUS_POWER_PMI, &priv->status);
301
302	if (priv->cfg->ops->lib->update_chain_flags)
303	priv->cfg->ops->lib->update_chain_flags(priv);
304
305	if (!ret)
306	setting->power_mode = final_mode;
307	}
308
309	return ret;
310	}
311	EXPORT_SYMBOL(iwl_power_update_mode);
312
313	/* Allow other iwl code to disable/enable power management active
314	* this will be usefull for rate scale to disable PM during heavy
315	* Tx/Rx activities
316	*/
317	int iwl_power_disable_management(struct iwl_priv *priv)
318	{
319	u16 prev_mode;
320	int ret = 0;
321
322	if (priv->power_data.power_disabled)
323	return -EBUSY;
324
325	prev_mode = priv->power_data.user_power_setting;
326	priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
327	ret = iwl_power_update_mode(priv, 0);
328	priv->power_data.power_disabled = 1;
329	priv->power_data.user_power_setting = prev_mode;
330
331	return ret;
332	}
333	EXPORT_SYMBOL(iwl_power_disable_management);
334
335	/* Allow other iwl code to disable/enable power management active
336	* this will be usefull for rate scale to disable PM during hight
337	* valume activities
338	*/
339	int iwl_power_enable_management(struct iwl_priv *priv)
340	{
341	int ret = 0;
342
343	priv->power_data.power_disabled = 0;
344	ret = iwl_power_update_mode(priv, 0);
345	return ret;
346	}
347	EXPORT_SYMBOL(iwl_power_enable_management);
348
349	/* set user_power_setting */
350	int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
351	{
352	int ret = 0;
353
354	if (mode > IWL_POWER_LIMIT)
355	return -EINVAL;
356
357	priv->power_data.user_power_setting = mode;
358
359	ret = iwl_power_update_mode(priv, 0);
360
361	return ret;
362	}
363	EXPORT_SYMBOL(iwl_power_set_user_mode);
364
365
366	/* set system_power_setting. This should be set by over all
367	* PM application.
368	*/
369	int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
370	{
371	int ret = 0;
372
373	if (mode > IWL_POWER_LIMIT)
374	return -EINVAL;
375
376	priv->power_data.system_power_setting = mode;
377
378	ret = iwl_power_update_mode(priv, 0);
379
380	return ret;
381	}
382	EXPORT_SYMBOL(iwl_power_set_system_mode);
383
384	/* initilize to default */
385	void iwl_power_initialize(struct iwl_priv *priv)
386	{
387
388	iwl_power_init_handle(priv);
389	priv->power_data.user_power_setting = IWL_POWER_AUTO;
390	priv->power_data.power_disabled = 0;
391	priv->power_data.system_power_setting = IWL_POWER_AUTO;
392	priv->power_data.is_battery_active = 0;
393	priv->power_data.power_disabled = 0;
394	priv->power_data.critical_power_setting = 0;
395	}
396	EXPORT_SYMBOL(iwl_power_initialize);
397
398	/* set critical_power_setting according to temperature value */
399	int iwl_power_temperature_change(struct iwl_priv *priv)
400	{
401	int ret = 0;
402	u16 new_critical = priv->power_data.critical_power_setting;
403	s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
404
405	if (temperature > IWL_CT_KILL_TEMPERATURE)
406	return 0;
407	else if (temperature > IWL_MIN_POWER_TEMPERATURE)
408	new_critical = IWL_POWER_INDEX_5;
409	else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
410	new_critical = IWL_POWER_INDEX_3;
411	else
412	new_critical = IWL_POWER_MODE_CAM;
413
414	if (new_critical != priv->power_data.critical_power_setting)
415	priv->power_data.critical_power_setting = new_critical;
416
417	if (priv->power_data.critical_power_setting >
418	priv->power_data.power_mode)
419	ret = iwl_power_update_mode(priv, 0);
420
421	return ret;
422	}
423	EXPORT_SYMBOL(iwl_power_temperature_change);