iwlwifi: Add power level support

Add power level support

Signed-off-by: Mohamed Abbas <mabbas@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

9 files changed, 543 insertions, 226 deletions

diff --git a/drivers/net/wireless/iwlwifi/Makefile b/drivers/net/wireless/iwlwifi/Makefile
index 7bc569be4ba7..e2c05f5346ef 100644
--- a/drivers/net/wireless/iwlwifi/Makefile
+++ b/drivers/net/wireless/iwlwifi/Makefile
@@ -1,5 +1,5 @@
 obj-$(CONFIG_IWLCORE)   += iwlcore.o
-iwlcore-objs            := iwl-core.o iwl-eeprom.o iwl-hcmd.o
+iwlcore-objs            := iwl-core.o iwl-eeprom.o iwl-hcmd.o iwl-power.o
 iwlcore-$(CONFIG_IWLWIFI_DEBUGFS) += iwl-debugfs.o
 iwlcore-$(CONFIG_IWLWIFI_LEDS) += iwl-led.o
 iwlcore-$(CONFIG_IWLWIFI_RFKILL) += iwl-rfkill.o
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
index c03c04fe14c7..b2fa58d2d174 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-commands.h
@@ -1853,6 +1853,7 @@ struct iwl4965_spectrum_notification {
 #define IWL_POWER_DRIVER_ALLOW_SLEEP_MSK        __constant_cpu_to_le16(1 << 0)
 #define IWL_POWER_SLEEP_OVER_DTIM_MSK           __constant_cpu_to_le16(1 << 2)
 #define IWL_POWER_PCI_PM_MSK                    __constant_cpu_to_le16(1 << 3)
+#define IWL_POWER_FAST_PD                       __constant_cpu_to_le16(1 << 4)
 
 struct iwl4965_powertable_cmd {
         __le16 flags;
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 2b9471f16862..d051aac558f2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -702,8 +702,6 @@ int iwl4965_hw_nic_init(struct iwl_priv *priv)
         u32 val;
         u8 val_link;
 
-        iwl4965_power_init_handle(priv);
-
         /* nic_init */
         spin_lock_irqsave(&priv->lock, flags);
 
@@ -1433,6 +1431,17 @@ int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
         return 0;
 }
 
+/* set card power command */
+static int iwl4965_set_power(struct iwl_priv *priv,
+                      void *cmd)
+{
+        int ret = 0;
+
+        ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
+                                    sizeof(struct iwl4965_powertable_cmd),
+                                    cmd, NULL);
+        return ret;
+}
 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
 {
         IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
@@ -4336,6 +4345,8 @@ static struct iwl_lib_ops iwl4965_lib = {
                 .release_semaphore = iwlcore_eeprom_release_semaphore,
         },
         .radio_kill_sw = iwl4965_radio_kill_sw,
+        .set_power = iwl4965_set_power,
+        .update_chain_flags = iwl4965_update_chain_flags,
 };
 
 static struct iwl_ops iwl4965_ops = {
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.h b/drivers/net/wireless/iwlwifi/iwl-4965.h
index 78381f287de8..0550d12e5c60 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.h
@@ -44,6 +44,7 @@
 #include "iwl-prph.h"
 #include "iwl-debug.h"
 #include "iwl-led.h"
+#include "iwl-power.h"
 
 /* configuration for the iwl4965 */
 extern struct iwl_cfg iwl4965_agn_cfg;
@@ -257,31 +258,6 @@ enum iwl_pwr_src {
         IWL_PWR_SRC_VAUX,
 };
 
-struct iwl4965_power_vec_entry {
-        struct iwl4965_powertable_cmd cmd;
-        u8 no_dtim;
-};
-#define IWL_POWER_RANGE_0  (0)
-#define IWL_POWER_RANGE_1  (1)
-
-#define IWL_POWER_MODE_CAM      0x00    /* Continuously Aware Mode, always on */
-#define IWL_POWER_INDEX_3       0x03
-#define IWL_POWER_INDEX_5       0x05
-#define IWL_POWER_AC            0x06
-#define IWL_POWER_BATTERY       0x07
-#define IWL_POWER_LIMIT         0x07
-#define IWL_POWER_MASK          0x0F
-#define IWL_POWER_ENABLED       0x10
-#define IWL_POWER_LEVEL(x)      ((x) & IWL_POWER_MASK)
-
-struct iwl4965_power_mgr {
-        spinlock_t lock;
-        struct iwl4965_power_vec_entry pwr_range_0[IWL_POWER_AC];
-        struct iwl4965_power_vec_entry pwr_range_1[IWL_POWER_AC];
-        u8 active_index;
-        u32 dtim_val;
-};
-
 #define IEEE80211_DATA_LEN              2304
 #define IEEE80211_4ADDR_LEN             30
 #define IEEE80211_HLEN                  (IEEE80211_4ADDR_LEN)
@@ -674,6 +650,7 @@ extern unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
 extern int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv,
                                          struct iwl4965_rx_queue *q);
 extern __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr);
+extern void iwl4965_update_chain_flags(struct iwl_priv *priv);
 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src);
 
 int iwl4965_init_geos(struct iwl_priv *priv);
@@ -1100,7 +1077,7 @@ struct iwl_priv {
                 u64 bytes;
         } tx_stats[3], rx_stats[3];
 
-        struct iwl4965_power_mgr power_data;
+        struct iwl_power_mgr power_data;
 
         struct iwl4965_notif_statistics statistics;
         unsigned long last_statistics_time;
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 2dfd982d7d1f..c336b1991f1a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -37,6 +37,7 @@ struct iwl_priv; /* FIXME: remove */
 #include "iwl-4965.h" /* FIXME: remove */
 #include "iwl-core.h"
 #include "iwl-rfkill.h"
+#include "iwl-power.h"
 
 
 MODULE_DESCRIPTION("iwl core");
@@ -263,8 +264,10 @@ int iwlcore_low_level_notify(struct iwl_priv *priv,
                 if (ret)
                         IWL_ERROR("Unable to initialize RFKILL system. "
                                   "Ignoring error: %d\n", ret);
+                iwl_power_initialize(priv);
                 break;
         case IWLCORE_START_EVT:
+                iwl_power_update_mode(priv, 1);
                 break;
         case IWLCORE_STOP_EVT:
                 break;
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 51f61fb844f0..3d113dce8994 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -118,6 +118,9 @@ struct iwl_lib_ops {
         struct {
                 int (*set_pwr_src)(struct iwl_priv *priv, enum iwl_pwr_src src);
         } apm_ops;
+        /* power */
+        int (*set_power)(struct iwl_priv *priv, void *cmd);
+        void (*update_chain_flags)(struct iwl_priv *priv);
         /* eeprom operations (as defined in iwl-eeprom.h) */
         struct iwl_eeprom_ops eeprom_ops;
 };
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c
new file mode 100644
index 000000000000..a242628465a7
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-power.c
@@ -0,0 +1,423 @@
+/******************************************************************************
+ *
+ * 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);
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.h b/drivers/net/wireless/iwlwifi/iwl-power.h
new file mode 100644
index 000000000000..aad2784ca2ea
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-power.h
@@ -0,0 +1,76 @@
+/******************************************************************************
+ *
+ * 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
+ *****************************************************************************/
+#ifndef __iwl_power_setting_h__
+#define __iwl_power_setting_h__
+
+#include <net/mac80211.h>
+#include "iwl-4965-commands.h"
+
+struct iwl_priv;
+
+#define IWL_POWER_MODE_CAM      0x00    /* Continuously Aware Mode, always on */
+#define IWL_POWER_INDEX_3       0x03
+#define IWL_POWER_INDEX_5       0x05
+#define IWL_POWER_AC            0x06
+#define IWL_POWER_BATTERY       0x07
+#define IWL_POWER_AUTO          0x08
+#define IWL_POWER_LIMIT         0x08
+#define IWL_POWER_MASK          0x0F
+#define IWL_POWER_ENABLED       0x10
+
+/* Power management (not Tx power) structures */
+
+struct iwl_power_vec_entry {
+        struct iwl4965_powertable_cmd cmd;
+        u8 no_dtim;
+};
+
+struct iwl_power_mgr {
+        spinlock_t lock;
+        struct iwl_power_vec_entry pwr_range_0[IWL_POWER_AC];
+        struct iwl_power_vec_entry pwr_range_1[IWL_POWER_AC];
+        struct iwl_power_vec_entry pwr_range_2[IWL_POWER_AC];
+        u32 dtim_period;
+        /* final power level that used to calculate final power command */
+        u8 power_mode;
+        u8 user_power_setting; /* set by user through mac80211 or sysfs */
+        u8 system_power_setting; /* set by kernel syatem tools */
+        u8 critical_power_setting; /* set if driver over heated */
+        u8 is_battery_active; /* DC/AC power */
+        u8 power_disabled; /* flag to disable using power saving level */
+};
+
+int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh);
+int iwl_power_disable_management(struct iwl_priv *priv);
+int iwl_power_enable_management(struct iwl_priv *priv);
+int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode);
+int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode);
+void iwl_power_initialize(struct iwl_priv *priv);
+int iwl_power_temperature_change(struct iwl_priv *priv);
+
+#endif  /* __iwl_power_setting_h__ */
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 50f12a6133e8..6cb54580fe6b 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -879,6 +879,13 @@ static int iwl4965_commit_rxon(struct iwl_priv *priv)
         return 0;
 }
 
+void iwl4965_update_chain_flags(struct iwl_priv *priv)
+{
+
+        iwl4965_set_rxon_chain(priv);
+        iwl4965_commit_rxon(priv);
+}
+
 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 {
         struct iwl4965_bt_cmd bt_cmd = {
@@ -1366,184 +1373,6 @@ static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
         }
 }
 
-/*
- * Power management (not Tx power!) functions
- */
-#define MSEC_TO_USEC 1024
-
-#define NOSLP __constant_cpu_to_le16(0), 0, 0
-#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
-#define SLP_TIMEOUT(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)}
-
-
-/* default power management (not Tx power) table values */
-/* for tim  0-10 */
-static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
-        {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
-        {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
-        {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
-        {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
-        {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
-        {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
-};
-
-/* for tim > 10 */
-static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
-        {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
-        {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
-                 SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
-        {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
-                 SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
-        {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
-                 SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
-        {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
-        {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
-                 SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
-};
-
-int iwl4965_power_init_handle(struct iwl_priv *priv)
-{
-        int rc = 0, i;
-        struct iwl4965_power_mgr *pow_data;
-        int size = sizeof(struct iwl4965_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));
-
-        pow_data->active_index = IWL_POWER_RANGE_0;
-        pow_data->dtim_val = 0xffff;
-
-        memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
-        memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
-
-        rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
-        if (rc != 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 rc;
-}
-
-static int iwl4965_update_power_cmd(struct iwl_priv *priv,
-                                struct iwl4965_powertable_cmd *cmd, u32 mode)
-{
-        int rc = 0, i;
-        u8 skip;
-        u32 max_sleep = 0;
-        struct iwl4965_power_vec_entry *range;
-        u8 period = 0;
-        struct iwl4965_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->active_index == IWL_POWER_RANGE_0)
-                range = &pow_data->pwr_range_0[0];
-        else
-                range = &pow_data->pwr_range_1[1];
-
-        memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
-
-#ifdef IWL_MAC80211_DISABLE
-        if (priv->assoc_network != NULL) {
-                unsigned long flags;
-
-                period = priv->assoc_network->tim.tim_period;
-        }
-#endif  /*IWL_MAC80211_DISABLE */
-        skip = range[mode].no_dtim;
-
-        if (period == 0) {
-                period = 1;
-                skip = 0;
-        }
-
-        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) / 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 rc;
-}
-
-static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
-{
-        u32 uninitialized_var(final_mode);
-        int rc;
-        struct iwl4965_powertable_cmd cmd;
-
-        /* If on battery, set to 3,
-         * if plugged into AC power, set to CAM ("continuously aware mode"),
-         * else user level */
-        switch (mode) {
-        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 = mode;
-                break;
-        }
-
-        cmd.keep_alive_beacons = 0;
-
-        iwl4965_update_power_cmd(priv, &cmd, final_mode);
-
-        rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
-
-        if (final_mode == IWL_POWER_MODE_CAM)
-                clear_bit(STATUS_POWER_PMI, &priv->status);
-        else
-                set_bit(STATUS_POWER_PMI, &priv->status);
-
-        return rc;
-}
-
 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
 {
         /* Filter incoming packets to determine if they are targeted toward
@@ -5304,8 +5133,6 @@ static void iwl4965_alive_start(struct iwl_priv *priv)
         priv->active_rate = priv->rates_mask;
         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
 
-        iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
-
         if (iwl_is_associated(priv)) {
                 struct iwl4965_rxon_cmd *active_rxon =
                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
@@ -5838,6 +5665,8 @@ static void iwl4965_bg_request_scan(struct work_struct *data)
                                 direct_mask,
                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
 
+        scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
+                               RXON_FILTER_BCON_AWARE_MSK);
         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
             scan->channel_count * sizeof(struct iwl4965_scan_channel);
         cmd.data = scan;
@@ -6000,6 +5829,7 @@ static void iwl4965_post_associate(struct iwl_priv *priv)
 
         iwl4965_activate_qos(priv, 0);
 
+        iwl_power_update_mode(priv, 0);
         /* we have just associated, don't start scan too early */
         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
 }
@@ -6990,6 +6820,8 @@ static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
                 iwl4965_commit_rxon(priv);
         }
 
+        iwl_power_update_mode(priv, 0);
+
         /* Per mac80211.h: This is only used in IBSS mode... */
         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
 
@@ -7321,20 +7153,11 @@ static ssize_t store_power_level(struct device *d,
                 goto out;
         }
 
-        if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
-                mode = IWL_POWER_AC;
-        else
-                mode |= IWL_POWER_ENABLED;
-
-        if (mode != priv->power_mode) {
-                rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
-                if (rc) {
-                        IWL_DEBUG_MAC80211("failed setting power mode.\n");
-                        goto out;
-                }
-                priv->power_mode = mode;
+        rc = iwl_power_set_user_mode(priv, mode);
+        if (rc) {
+                IWL_DEBUG_MAC80211("failed setting power mode.\n");
+                goto out;
         }
-
         rc = count;
 
  out:
@@ -7364,7 +7187,7 @@ static ssize_t show_power_level(struct device *d,
                                 struct device_attribute *attr, char *buf)
 {
         struct iwl_priv *priv = dev_get_drvdata(d);
-        int level = IWL_POWER_LEVEL(priv->power_mode);
+        int level = priv->power_data.power_mode;
         char *p = buf;
 
         p += sprintf(p, "%d ", level);
@@ -7382,14 +7205,14 @@ static ssize_t show_power_level(struct device *d,
                              timeout_duration[level - 1] / 1000,
                              period_duration[level - 1] / 1000);
         }
-
+/*
         if (!(priv->power_mode & IWL_POWER_ENABLED))
                 p += sprintf(p, " OFF\n");
         else
                 p += sprintf(p, " \n");
-
+*/
+        p += sprintf(p, " \n");
         return (p - buf + 1);
-
 }
 
 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,