166 lines
5.1 KiB
C
166 lines
5.1 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2007 - 2011 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/slab.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-io.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 allows the card to go to sleep when not busy.
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*
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* We calculate a sleep command based on the required latency, which
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* we get from mac80211. In order to handle thermal throttling, we can
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* also use pre-defined power levels.
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*/
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/*
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* This defines the old power levels. They are still used by default
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* (level 1) and for thermal throttle (levels 3 through 5)
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*/
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struct iwl_power_vec_entry {
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struct iwl_powertable_cmd cmd;
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u8 no_dtim; /* number of skip dtim */
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};
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static void iwl_legacy_power_sleep_cam_cmd(struct iwl_priv *priv,
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struct iwl_powertable_cmd *cmd)
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{
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memset(cmd, 0, sizeof(*cmd));
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if (priv->power_data.pci_pm)
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cmd->flags |= IWL_POWER_PCI_PM_MSK;
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IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
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}
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static int
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iwl_legacy_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
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{
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IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
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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",
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le32_to_cpu(cmd->tx_data_timeout));
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IWL_DEBUG_POWER(priv, "Rx timeout = %u\n",
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le32_to_cpu(cmd->rx_data_timeout));
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IWL_DEBUG_POWER(priv,
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"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 iwl_legacy_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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int
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iwl_legacy_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
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bool force)
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{
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int ret;
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bool update_chains;
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lockdep_assert_held(&priv->mutex);
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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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if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
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return 0;
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if (!iwl_legacy_is_ready_rf(priv))
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return -EIO;
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/* scan complete use sleep_power_next, need to be updated */
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memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
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if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
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IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
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return 0;
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}
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if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
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set_bit(STATUS_POWER_PMI, &priv->status);
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ret = iwl_legacy_set_power(priv, cmd);
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if (!ret) {
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if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
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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 if (priv->cfg->ops->lib->update_chain_flags)
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IWL_DEBUG_POWER(priv,
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"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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memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
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} else
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IWL_ERR(priv, "set power fail, ret = %d", ret);
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return ret;
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}
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int iwl_legacy_power_update_mode(struct iwl_priv *priv, bool force)
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{
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struct iwl_powertable_cmd cmd;
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iwl_legacy_power_sleep_cam_cmd(priv, &cmd);
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return iwl_legacy_power_set_mode(priv, &cmd, force);
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}
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EXPORT_SYMBOL(iwl_legacy_power_update_mode);
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/* initialize to default */
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void iwl_legacy_power_initialize(struct iwl_priv *priv)
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{
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u16 lctl = iwl_legacy_pcie_link_ctl(priv);
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priv->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
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priv->power_data.debug_sleep_level_override = -1;
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memset(&priv->power_data.sleep_cmd, 0,
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sizeof(priv->power_data.sleep_cmd));
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}
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EXPORT_SYMBOL(iwl_legacy_power_initialize);
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