| /****************************************************************************** |
| * |
| * 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" |
| |
| /* |
| * 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); |