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  1/******************************************************************************
  2 *
  3 * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
  4 *
  5 * Portions of this file are derived from the ipw3945 project, as well
  6 * as portions of the ieee80211 subsystem header files.
  7 *
  8 * This program is free software; you can redistribute it and/or modify it
  9 * under the terms of version 2 of the GNU General Public License as
 10 * published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful, but WITHOUT
 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 15 * more details.
 16 *
 17 * You should have received a copy of the GNU General Public License along with
 18 * this program; if not, write to the Free Software Foundation, Inc.,
 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 20 *
 21 * The full GNU General Public License is included in this distribution in the
 22 * file called LICENSE.
 23 *
 24 * Contact Information:
 25 *  Intel Linux Wireless <ilw@linux.intel.com>
 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 27 *****************************************************************************/
 28#ifndef __iwl_tt_setting_h__
 29#define __iwl_tt_setting_h__
 30
 31#include "iwl-commands.h"
 32
 33#define IWL_ABSOLUTE_ZERO		0
 34#define IWL_ABSOLUTE_MAX		0xFFFFFFFF
 35#define IWL_TT_INCREASE_MARGIN	5
 36#define IWL_TT_CT_KILL_MARGIN	3
 37
 38enum iwl_antenna_ok {
 39	IWL_ANT_OK_NONE,
 40	IWL_ANT_OK_SINGLE,
 41	IWL_ANT_OK_MULTI,
 42};
 43
 44/* Thermal Throttling State Machine states */
 45enum  iwl_tt_state {
 46	IWL_TI_0,	/* normal temperature, system power state */
 47	IWL_TI_1,	/* high temperature detect, low power state */
 48	IWL_TI_2,	/* higher temperature detected, lower power state */
 49	IWL_TI_CT_KILL, /* critical temperature detected, lowest power state */
 50	IWL_TI_STATE_MAX
 51};
 52
 53/**
 54 * struct iwl_tt_restriction - Thermal Throttling restriction table
 55 * @tx_stream: number of tx stream allowed
 56 * @is_ht: ht enable/disable
 57 * @rx_stream: number of rx stream allowed
 58 *
 59 * This table is used by advance thermal throttling management
 60 * based on the current thermal throttling state, and determines
 61 * the number of tx/rx streams and the status of HT operation.
 62 */
 63struct iwl_tt_restriction {
 64	enum iwl_antenna_ok tx_stream;
 65	enum iwl_antenna_ok rx_stream;
 66	bool is_ht;
 67};
 68
 69/**
 70 * struct iwl_tt_trans - Thermal Throttling transaction table
 71 * @next_state:  next thermal throttling mode
 72 * @tt_low: low temperature threshold to change state
 73 * @tt_high: high temperature threshold to change state
 74 *
 75 * This is used by the advanced thermal throttling algorithm
 76 * to determine the next thermal state to go based on the
 77 * current temperature.
 78 */
 79struct iwl_tt_trans {
 80	enum iwl_tt_state next_state;
 81	u32 tt_low;
 82	u32 tt_high;
 83};
 84
 85/**
 86 * struct iwl_tt_mgnt - Thermal Throttling Management structure
 87 * @advanced_tt:    advanced thermal throttle required
 88 * @state:          current Thermal Throttling state
 89 * @tt_power_mode:  Thermal Throttling power mode index
 90 *		    being used to set power level when
 91 *		    when thermal throttling state != IWL_TI_0
 92 *		    the tt_power_mode should set to different
 93 *		    power mode based on the current tt state
 94 * @tt_previous_temperature: last measured temperature
 95 * @iwl_tt_restriction: ptr to restriction tbl, used by advance
 96 *		    thermal throttling to determine how many tx/rx streams
 97 *		    should be used in tt state; and can HT be enabled or not
 98 * @iwl_tt_trans: ptr to adv trans table, used by advance thermal throttling
 99 *		    state transaction
100 * @ct_kill_toggle: used to toggle the CSR bit when checking uCode temperature
101 * @ct_kill_exit_tm: timer to exit thermal kill
102 */
103struct iwl_tt_mgmt {
104	enum iwl_tt_state state;
105	bool advanced_tt;
106	u8 tt_power_mode;
107	bool ct_kill_toggle;
108#ifdef CONFIG_IWLWIFI_DEBUG
109	s32 tt_previous_temp;
110#endif
111	struct iwl_tt_restriction *restriction;
112	struct iwl_tt_trans *transaction;
113	struct timer_list ct_kill_exit_tm;
114	struct timer_list ct_kill_waiting_tm;
115};
116
117u8 iwl_tt_current_power_mode(struct iwl_priv *priv);
118bool iwl_tt_is_low_power_state(struct iwl_priv *priv);
119bool iwl_ht_enabled(struct iwl_priv *priv);
120bool iwl_check_for_ct_kill(struct iwl_priv *priv);
121enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv);
122enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv);
123void iwl_tt_enter_ct_kill(struct iwl_priv *priv);
124void iwl_tt_exit_ct_kill(struct iwl_priv *priv);
125void iwl_tt_handler(struct iwl_priv *priv);
126void iwl_tt_initialize(struct iwl_priv *priv);
127void iwl_tt_exit(struct iwl_priv *priv);
128
129#endif  /* __iwl_tt_setting_h__ */