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/******************************************************************************
*
* Copyright(c) 2007 - 2011 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/slab.h>
#include <linux/init.h>
#include <net/mac80211.h>
#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-commands.h"
#include "iwl-debug.h"
#include "iwl-power.h"
/*
* Setting power level allows the card to go to sleep when not busy.
*
* We calculate a sleep command based on the required latency, which
* we get from mac80211. In order to handle thermal throttling, we can
* also use pre-defined power levels.
*/
/*
* This defines the old power levels. They are still used by default
* (level 1) and for thermal throttle (levels 3 through 5)
*/
struct iwl_power_vec_entry {
struct iwl_powertable_cmd cmd;
u8 no_dtim; /* number of skip dtim */
};
static void iwl_legacy_power_sleep_cam_cmd(struct iwl_priv *priv,
struct iwl_powertable_cmd *cmd)
{
memset(cmd, 0, sizeof(*cmd));
if (priv->power_data.pci_pm)
cmd->flags |= IWL_POWER_PCI_PM_MSK;
IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
}
static int
iwl_legacy_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
{
IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
IWL_DEBUG_POWER(priv, "Tx timeout = %u\n",
le32_to_cpu(cmd->tx_data_timeout));
IWL_DEBUG_POWER(priv, "Rx timeout = %u\n",
le32_to_cpu(cmd->rx_data_timeout));
IWL_DEBUG_POWER(priv,
"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 iwl_legacy_send_cmd_pdu(priv, POWER_TABLE_CMD,
sizeof(struct iwl_powertable_cmd), cmd);
}
int
iwl_legacy_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
bool force)
{
int ret;
bool update_chains;
lockdep_assert_held(&priv->mutex);
/* 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 (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
return 0;
if (!iwl_legacy_is_ready_rf(priv))
return -EIO;
/* scan complete use sleep_power_next, need to be updated */
memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
return 0;
}
if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
set_bit(STATUS_POWER_PMI, &priv->status);
ret = iwl_legacy_set_power(priv, cmd);
if (!ret) {
if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
clear_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 if (priv->cfg->ops->lib->update_chain_flags)
IWL_DEBUG_POWER(priv,
"Cannot update the power, chain noise "
"calibration running: %d\n",
priv->chain_noise_data.state);
memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
} else
IWL_ERR(priv, "set power fail, ret = %d", ret);
return ret;
}
int iwl_legacy_power_update_mode(struct iwl_priv *priv, bool force)
{
struct iwl_powertable_cmd cmd;
iwl_legacy_power_sleep_cam_cmd(priv, &cmd);
return iwl_legacy_power_set_mode(priv, &cmd, force);
}
EXPORT_SYMBOL(iwl_legacy_power_update_mode);
/* initialize to default */
void iwl_legacy_power_initialize(struct iwl_priv *priv)
{
u16 lctl = iwl_legacy_pcie_link_ctl(priv);
priv->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
priv->power_data.debug_sleep_level_override = -1;
memset(&priv->power_data.sleep_cmd, 0,
sizeof(priv->power_data.sleep_cmd));
}
EXPORT_SYMBOL(iwl_legacy_power_initialize);
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