279 строки
8.7 KiB
C
279 строки
8.7 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2009 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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* Intel Linux Wireless <ilw@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/init.h>
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#include <net/mac80211.h>
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#include "iwl-eeprom.h"
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-commands.h"
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#include "iwl-debug.h"
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#include "iwl-power.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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*
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* The power level is set to INDEX_1 (the least deep state) by
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* default, and will, in the future, be the deepest state unless
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* otherwise required by pm_qos network latency requirements.
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*
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* Using INDEX_1 without pm_qos is ok because mac80211 will disable
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* PS when even checking every beacon for the TIM bit would exceed
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* the required latency.
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*/
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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 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 TU_TO_USEC 1024
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#define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
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#define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
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cpu_to_le32(X1), \
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cpu_to_le32(X2), \
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cpu_to_le32(X3), \
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cpu_to_le32(X4)}
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/* default power management (not Tx power) table values */
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/* for DTIM period 0 through IWL_POWER_RANGE_0_MAX */
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static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
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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 DTIM period IWL_POWER_RANGE_0_MAX + 1 through IWL_POWER_RANGE_1_MAX */
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static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
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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 DTIM period > IWL_POWER_RANGE_1_MAX */
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static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
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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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/* set card power command */
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static int iwl_set_power(struct iwl_priv *priv, void *cmd)
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{
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return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
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sizeof(struct iwl_powertable_cmd), cmd);
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}
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/* initialize to default */
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static void iwl_power_init_handle(struct iwl_priv *priv)
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{
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struct iwl_power_mgr *pow_data;
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int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM;
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struct iwl_powertable_cmd *cmd;
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int i;
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u16 lctl;
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IWL_DEBUG_POWER(priv, "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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lctl = iwl_pcie_link_ctl(priv);
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IWL_DEBUG_POWER(priv, "adjust power command flags\n");
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for (i = 0; i < IWL_POWER_NUM; i++) {
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cmd = &pow_data->pwr_range_0[i].cmd;
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if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
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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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/* adjust power command according to DTIM period and power level*/
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static int iwl_update_power_cmd(struct iwl_priv *priv,
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struct iwl_powertable_cmd *cmd, u16 mode)
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{
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struct iwl_power_vec_entry *range;
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struct iwl_power_mgr *pow_data;
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int i;
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u32 max_sleep = 0;
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u8 period;
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bool skip;
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if (mode > IWL_POWER_INDEX_5) {
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IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
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return -EINVAL;
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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 iwl_powertable_cmd));
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if (period == 0) {
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period = 1;
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skip = false;
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} else {
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skip = !!range[mode].no_dtim;
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}
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if (skip) {
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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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} else {
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max_sleep = 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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IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
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IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
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IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
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IWL_DEBUG_POWER(priv, "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 0;
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}
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/*
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* compute the final power mode index
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*/
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int iwl_power_update_mode(struct iwl_priv *priv, bool force)
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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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bool update_chains;
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/* Don't update the RX chain when chain noise calibration is running */
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update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
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priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
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final_mode = priv->power_data.user_power_setting;
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if (setting->power_disabled)
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final_mode = IWL_POWER_MODE_CAM;
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if (iwl_is_ready_rf(priv) &&
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((setting->power_mode != final_mode) || force)) {
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struct iwl_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_cmd(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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ret = iwl_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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if (priv->cfg->ops->lib->update_chain_flags && update_chains)
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priv->cfg->ops->lib->update_chain_flags(priv);
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else
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IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
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"calibration running: %d\n",
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priv->chain_noise_data.state);
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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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/* 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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if (mode >= IWL_POWER_NUM)
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return -EINVAL;
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priv->power_data.user_power_setting = mode;
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return iwl_power_update_mode(priv, 0);
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}
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EXPORT_SYMBOL(iwl_power_set_user_mode);
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/* initialize 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_INDEX_1;
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/* default to disabled until mac80211 says otherwise */
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priv->power_data.power_disabled = 1;
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}
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EXPORT_SYMBOL(iwl_power_initialize);
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