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>
This commit is contained in:
Mohamed Abbas
committed by
John W. Linville
John W. Linville
parent
7eafd25d95
commit
5da4b55f78
423
drivers/net/wireless/iwlwifi/iwl-power.c
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423
drivers/net/wireless/iwlwifi/iwl-power.c
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@@ -0,0 +1,423 @@
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/******************************************************************************
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*
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* Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
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*
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* Portions of this file are derived from the ipw3945 project, as well
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* as portions of the ieee80211 subsystem header files.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* James P. Ketrenos <ipw2100-admin@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/init.h>
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#include <net/mac80211.h>
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#include "iwl-eeprom.h"
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#include "iwl-4965.h"
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#include "iwl-core.h"
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#include "iwl-4965-commands.h"
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#include "iwl-debug.h"
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#include "iwl-power.h"
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#include "iwl-helpers.h"
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/*
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* Setting power level allow the card to go to sleep when not busy
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* there are three factor that decide the power level to go to, they
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* are list here with its priority
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* 1- critical_power_setting this will be set according to card temperature.
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* 2- system_power_setting this will be set by system PM manager.
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* 3- user_power_setting this will be set by user either by writing to sys or
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* mac80211
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*
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* if system_power_setting and user_power_setting is set to auto
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* the power level will be decided according to association status and battery
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* status.
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*
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*/
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#define MSEC_TO_USEC 1024
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#define IWL_POWER_RANGE_0_MAX (2)
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#define IWL_POWER_RANGE_1_MAX (10)
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#define NOSLP __constant_cpu_to_le16(0), 0, 0
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#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
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#define SLP_TOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
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#define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
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__constant_cpu_to_le32(X1), \
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__constant_cpu_to_le32(X2), \
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__constant_cpu_to_le32(X3), \
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__constant_cpu_to_le32(X4)}
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#define IWL_POWER_ON_BATTERY IWL_POWER_INDEX_5
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#define IWL_POWER_ON_AC_DISASSOC IWL_POWER_MODE_CAM
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#define IWL_POWER_ON_AC_ASSOC IWL_POWER_MODE_CAM
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#define IWL_CT_KILL_TEMPERATURE 110
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#define IWL_MIN_POWER_TEMPERATURE 100
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#define IWL_REDUCED_POWER_TEMPERATURE 95
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/* default power management (not Tx power) table values */
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/* for tim 0-10 */
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static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
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{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
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};
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/* for tim = 3-10 */
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static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
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{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
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};
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/* for tim > 11 */
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static struct iwl_power_vec_entry range_2[IWL_POWER_AC] = {
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{{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
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{{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
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{{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
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{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
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};
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/* decide the right power level according to association status
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* and battery status
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*/
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static u16 iwl_get_auto_power_mode(struct iwl_priv *priv)
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{
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u16 mode = priv->power_data.user_power_setting;
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switch (priv->power_data.user_power_setting) {
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case IWL_POWER_AUTO:
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/* if running on battery */
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if (priv->power_data.is_battery_active)
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mode = IWL_POWER_ON_BATTERY;
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else if (iwl_is_associated(priv))
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mode = IWL_POWER_ON_AC_ASSOC;
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else
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mode = IWL_POWER_ON_AC_DISASSOC;
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break;
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case IWL_POWER_BATTERY:
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mode = IWL_POWER_INDEX_3;
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break;
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case IWL_POWER_AC:
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mode = IWL_POWER_MODE_CAM;
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break;
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}
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return mode;
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}
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/* initialize to default */
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static int iwl_power_init_handle(struct iwl_priv *priv)
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{
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int ret = 0, i;
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struct iwl_power_mgr *pow_data;
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int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
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u16 pci_pm;
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IWL_DEBUG_POWER("Initialize power \n");
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pow_data = &(priv->power_data);
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memset(pow_data, 0, sizeof(*pow_data));
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memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
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memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
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memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
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ret = pci_read_config_word(priv->pci_dev,
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PCI_LINK_CTRL, &pci_pm);
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if (ret != 0)
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return 0;
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else {
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struct iwl4965_powertable_cmd *cmd;
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IWL_DEBUG_POWER("adjust power command flags\n");
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for (i = 0; i < IWL_POWER_AC; i++) {
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cmd = &pow_data->pwr_range_0[i].cmd;
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if (pci_pm & 0x1)
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cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
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else
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cmd->flags |= IWL_POWER_PCI_PM_MSK;
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}
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}
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return ret;
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}
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/* adjust power command according to dtim period and power level*/
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static int iwl_update_power_command(struct iwl_priv *priv,
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struct iwl4965_powertable_cmd *cmd,
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u16 mode)
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{
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int ret = 0, i;
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u8 skip;
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u32 max_sleep = 0;
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struct iwl_power_vec_entry *range;
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u8 period = 0;
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struct iwl_power_mgr *pow_data;
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if (mode > IWL_POWER_INDEX_5) {
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IWL_DEBUG_POWER("Error invalid power mode \n");
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return -1;
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}
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pow_data = &(priv->power_data);
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if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
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range = &pow_data->pwr_range_0[0];
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else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
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range = &pow_data->pwr_range_1[0];
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else
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range = &pow_data->pwr_range_2[0];
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period = pow_data->dtim_period;
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memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
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if (period == 0) {
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period = 1;
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skip = 0;
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} else
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skip = range[mode].no_dtim;
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if (skip == 0) {
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max_sleep = period;
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cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
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} else {
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__le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
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max_sleep = le32_to_cpu(slp_itrvl);
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if (max_sleep == 0xFF)
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max_sleep = period * (skip + 1);
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else if (max_sleep > period)
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max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
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cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
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}
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for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
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if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
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cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
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}
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IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
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IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
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IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
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IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
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le32_to_cpu(cmd->sleep_interval[0]),
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le32_to_cpu(cmd->sleep_interval[1]),
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le32_to_cpu(cmd->sleep_interval[2]),
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le32_to_cpu(cmd->sleep_interval[3]),
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le32_to_cpu(cmd->sleep_interval[4]));
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return ret;
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}
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/*
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* calucaute the final power mode index
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*/
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int iwl_power_update_mode(struct iwl_priv *priv, u8 refresh)
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{
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struct iwl_power_mgr *setting = &(priv->power_data);
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int ret = 0;
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u16 uninitialized_var(final_mode);
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/* If on battery, set to 3,
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* if plugged into AC power, set to CAM ("continuously aware mode"),
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* else user level */
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switch (setting->system_power_setting) {
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case IWL_POWER_AUTO:
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final_mode = iwl_get_auto_power_mode(priv);
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break;
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case IWL_POWER_BATTERY:
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final_mode = IWL_POWER_INDEX_3;
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break;
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case IWL_POWER_AC:
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final_mode = IWL_POWER_MODE_CAM;
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break;
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default:
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final_mode = setting->system_power_setting;
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}
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if (setting->critical_power_setting > final_mode)
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final_mode = setting->critical_power_setting;
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/* driver only support CAM for non STA network */
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if (priv->iw_mode != IEEE80211_IF_TYPE_STA)
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final_mode = IWL_POWER_MODE_CAM;
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if (!iwl_is_rfkill(priv) && !setting->power_disabled &&
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((setting->power_mode != final_mode) || refresh)) {
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struct iwl4965_powertable_cmd cmd;
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if (final_mode != IWL_POWER_MODE_CAM)
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set_bit(STATUS_POWER_PMI, &priv->status);
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iwl_update_power_command(priv, &cmd, final_mode);
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cmd.keep_alive_beacons = 0;
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if (final_mode == IWL_POWER_INDEX_5)
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cmd.flags |= IWL_POWER_FAST_PD;
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if (priv->cfg->ops->lib->set_power)
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ret = priv->cfg->ops->lib->set_power(priv, &cmd);
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if (final_mode == IWL_POWER_MODE_CAM)
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clear_bit(STATUS_POWER_PMI, &priv->status);
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else
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set_bit(STATUS_POWER_PMI, &priv->status);
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if (priv->cfg->ops->lib->update_chain_flags)
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priv->cfg->ops->lib->update_chain_flags(priv);
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if (!ret)
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setting->power_mode = final_mode;
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}
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_update_mode);
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/* Allow other iwl code to disable/enable power management active
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* this will be usefull for rate scale to disable PM during heavy
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* Tx/Rx activities
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*/
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int iwl_power_disable_management(struct iwl_priv *priv)
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{
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u16 prev_mode;
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int ret = 0;
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if (priv->power_data.power_disabled)
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return -EBUSY;
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prev_mode = priv->power_data.user_power_setting;
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priv->power_data.user_power_setting = IWL_POWER_MODE_CAM;
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ret = iwl_power_update_mode(priv, 0);
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priv->power_data.power_disabled = 1;
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priv->power_data.user_power_setting = prev_mode;
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_disable_management);
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/* Allow other iwl code to disable/enable power management active
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* this will be usefull for rate scale to disable PM during hight
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* valume activities
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*/
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int iwl_power_enable_management(struct iwl_priv *priv)
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{
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int ret = 0;
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priv->power_data.power_disabled = 0;
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ret = iwl_power_update_mode(priv, 0);
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_enable_management);
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/* set user_power_setting */
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int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
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{
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int ret = 0;
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if (mode > IWL_POWER_LIMIT)
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return -EINVAL;
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priv->power_data.user_power_setting = mode;
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ret = iwl_power_update_mode(priv, 0);
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_set_user_mode);
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/* set system_power_setting. This should be set by over all
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* PM application.
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*/
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int iwl_power_set_system_mode(struct iwl_priv *priv, u16 mode)
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{
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int ret = 0;
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if (mode > IWL_POWER_LIMIT)
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return -EINVAL;
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priv->power_data.system_power_setting = mode;
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ret = iwl_power_update_mode(priv, 0);
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return ret;
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}
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EXPORT_SYMBOL(iwl_power_set_system_mode);
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/* initilize to default */
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void iwl_power_initialize(struct iwl_priv *priv)
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{
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iwl_power_init_handle(priv);
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priv->power_data.user_power_setting = IWL_POWER_AUTO;
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priv->power_data.power_disabled = 0;
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priv->power_data.system_power_setting = IWL_POWER_AUTO;
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priv->power_data.is_battery_active = 0;
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priv->power_data.power_disabled = 0;
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priv->power_data.critical_power_setting = 0;
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}
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EXPORT_SYMBOL(iwl_power_initialize);
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/* set critical_power_setting according to temperature value */
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int iwl_power_temperature_change(struct iwl_priv *priv)
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{
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int ret = 0;
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u16 new_critical = priv->power_data.critical_power_setting;
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s32 temperature = KELVIN_TO_CELSIUS(priv->last_temperature);
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if (temperature > IWL_CT_KILL_TEMPERATURE)
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return 0;
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else if (temperature > IWL_MIN_POWER_TEMPERATURE)
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new_critical = IWL_POWER_INDEX_5;
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else if (temperature > IWL_REDUCED_POWER_TEMPERATURE)
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new_critical = IWL_POWER_INDEX_3;
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else
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new_critical = IWL_POWER_MODE_CAM;
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if (new_critical != priv->power_data.critical_power_setting)
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priv->power_data.critical_power_setting = new_critical;
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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);
|
||||
Reference in New Issue
Block a user