diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-power.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-power.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c new file mode 100644 index 00000000000..2e71803e09b --- /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-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_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); |